fix(cli): cover every npm install lifecycle hook

npm runs prepublish, preprepare and postprepare on install too, so a project
using one of those would have had its install layer split and the hook would
run against a source tree that is not there yet.

.github/scripts/run_langgraph_cli_test.py

@@ -41,7 +41,7 @@ def test(config: pathlib.Path, port: int, tag: str, verbose: bool):
         )
 
         # Compose up with wait (implies detach), similar to `langgraph up --wait`
-        args_up = [*args, "up", "--remove-orphans", "--wait", "--wait-timeout", "180"]
+        args_up = [*args, "up", "--remove-orphans", "--wait"]
 
         compose_cmd = ["docker", "compose"]
         if capabilities.compose_type == "standalone":

.github/workflows/_integration_test.yml

@@ -71,7 +71,7 @@ jobs:
           if [ -f ../.env ]; then echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> ../.env; fi
           # Run the integration test using the built tag
           REPO_ROOT=$(git rev-parse --show-toplevel)
-          timeout --kill-after=30 300 python "$REPO_ROOT/.github/scripts/run_langgraph_cli_test.py" -t ${{ matrix.example.tag }}
+          timeout 60 python "$REPO_ROOT/.github/scripts/run_langgraph_cli_test.py" -t ${{ matrix.example.tag }}
 
       - name: Build JS service
         if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
@@ -98,7 +98,7 @@ jobs:
         run: |
           cp apps/agent/.env.example apps/agent/.env
           echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> apps/agent/.env
-          timeout --kill-after=30 300 python ../../../.github/scripts/run_langgraph_cli_test.py -t langgraph-test-g -c apps/agent/langgraph.json
+          timeout 60 python ../../../.github/scripts/run_langgraph_cli_test.py -t langgraph-test-g -c apps/agent/langgraph.json
 
       - name: Build prerelease reqs service
         if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
@@ -113,11 +113,11 @@ jobs:
         run: |
           cp ../.env.example .env
           echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> .env
-          timeout --kill-after=30 300 python ../../../../.github/scripts/run_langgraph_cli_test.py -t langgraph-test-h
+          timeout 60 python ../../../../.github/scripts/run_langgraph_cli_test.py -t langgraph-test-h
           echo "Finished starting up langgraph-test-h"
           LANGGRAPH_VERSION=$(docker run --rm --entrypoint "" langgraph-test-h python -c "import sys; from importlib.metadata import version; v = version('langgraph'); print(v);")
-          if [ "$LANGGRAPH_VERSION" != "1.2.6" ]; then
-            echo "LANGGRAPH_VERSION != 1.2.6; $LANGGRAPH_VERSION"
+          if [ "$LANGGRAPH_VERSION" != "1.1.5" ]; then
+            echo "LANGGRAPH_VERSION != 1.1.5; $LANGGRAPH_VERSION"
             exit 1
           fi
           LANGCHAIN_OPENAI_VERSION=$(docker run --rm --entrypoint "" langgraph-test-h python -c "import sys; from importlib.metadata import version; v = version('langchain-openai'); print(v);")
@@ -150,7 +150,7 @@ jobs:
         run: |
           cp .env.example .env
           echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> .env
-          timeout --kill-after=30 300 python ../../../../.github/scripts/run_langgraph_cli_test.py -t langgraph-test-uv-simple
+          timeout 60 python ../../../../.github/scripts/run_langgraph_cli_test.py -t langgraph-test-uv-simple
 
       - name: Build uv monorepo service
         if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
@@ -165,4 +165,4 @@ jobs:
         run: |
           cp .env.example .env
           echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> .env
-          timeout --kill-after=30 300 python ../../../../../../.github/scripts/run_langgraph_cli_test.py -t langgraph-test-uv-monorepo
+          timeout 60 python ../../../../../../.github/scripts/run_langgraph_cli_test.py -t langgraph-test-uv-monorepo

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
       sdk_py: ${{ steps.filter.outputs.sdk_py || 'true' }}
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-      - uses: dorny/paths-filter@ceb8a2b8f2d89434be7ff52d3de7ec3738c5cc9d # v4
+      - uses: dorny/paths-filter@7b450fff21473bca461d4b92ce414b9d0420d706 # v4
         if: github.event_name != 'workflow_dispatch'
         id: filter
         with:

.github/workflows/deploy-redirects.yml

@@ -7,10 +7,6 @@ on:
     paths:
       - 'docs/**'
       - '.github/workflows/deploy-redirects.yml'
-  # llms.txt is fetched from docs.langchain.com at build time, so redeploy on a
-  # schedule to pick up docs changes that never touch this repo.
-  schedule:
-    - cron: '17 6 * * 1'
   workflow_dispatch:
 
 permissions:
@@ -50,4 +46,4 @@ jobs:
 
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@368f82528645a54fb793d4d04e342629a3f51346 # v5.0.1
+        uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5.0.0

.github/workflows/release.yml

@@ -139,10 +139,23 @@ jobs:
             echo EOF
           } >> "$GITHUB_OUTPUT"
 
+  test-pypi-publish:
+    needs:
+      - build
+      - release-notes
+    permissions:
+      contents: read
+      id-token: write
+    uses: ./.github/workflows/_test_release.yml
+    with:
+      working-directory: ${{ inputs.working-directory }}
+    secrets: inherit
+
   pre-release-checks:
     needs:
       - build
       - release-notes
+      - test-pypi-publish
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -167,20 +180,31 @@ jobs:
           enable-cache: false
           working-directory: ${{ inputs.working-directory }}
 
-      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
-        with:
-          name: dist
-          path: ${{ inputs.working-directory }}/dist/
-
-      - name: Import dist package
+      - name: Import published package
         shell: bash
         working-directory: ${{ inputs.working-directory }}
         env:
           PKG_NAME: ${{ needs.build.outputs.pkg-name }}
           VERSION: ${{ needs.build.outputs.version }}
-        # Install directly from the locally-built wheel (no index resolution needed).
+        # Here we use:
+        # - The default regular PyPI index as the *primary* index, meaning
+        #   that it takes priority (https://pypi.org/simple)
+        # - The test PyPI index as an extra index, so that any dependencies that
+        #   are not found on test PyPI can be resolved and installed anyway.
+        #   (https://test.pypi.org/simple). This will include the PKG_NAME==VERSION
+        #   package because VERSION will not have been uploaded to regular PyPI yet.
+        # - attempt install again after 5 seconds if it fails because there is
+        #   sometimes a delay in availability on test pypi
         run: |
-          uv run pip install dist/*.whl
+          uv run pip install \
+            --extra-index-url https://test.pypi.org/simple/ \
+            "$PKG_NAME==$VERSION" || \
+          ( \
+            sleep 5 && \
+            uv run pip install \
+              --extra-index-url https://test.pypi.org/simple/ \
+              "$PKG_NAME==$VERSION" \
+          )
 
           if [[ "$PKG_NAME" == *prebuilt* ]]; then
             uv run pip install langgraph
@@ -202,7 +226,7 @@ jobs:
         run: uv sync --group test
         working-directory: ${{ inputs.working-directory }}
 
-      # Overwrite the local version of the package with the built version
+      # Overwrite the local version of the package with the test PyPI version.
       - name: Import published package (again)
         working-directory: ${{ inputs.working-directory }}
         shell: bash
@@ -210,25 +234,14 @@ jobs:
           PKG_NAME: ${{ needs.build.outputs.pkg-name }}
           VERSION: ${{ needs.build.outputs.version }}
         run: |
-          uv run pip install dist/*.whl
+          uv run pip install \
+            --extra-index-url https://test.pypi.org/simple/ \
+            "$PKG_NAME==$VERSION"
 
       - name: Run unit tests
         run: make test
         working-directory: ${{ inputs.working-directory }}
 
-  test-pypi-publish:
-    needs:
-      - build
-      - release-notes
-      - pre-release-checks
-    permissions:
-      contents: read
-      id-token: write
-    uses: ./.github/workflows/_test_release.yml
-    with:
-      working-directory: ${{ inputs.working-directory }}
-    secrets: inherit
-
   publish:
     needs:
       - build

.gitignore

@@ -76,12 +76,7 @@ __pypackages__/
 
 # Environments
 .env
-.env.*
 .envrc
-*.crt
-*.key
-*.pem
-credentials.json
 .venv
 .venvs
 env/
@@ -103,7 +98,6 @@ dmypy.json
 
 .vercel
 .turbo
-node_modules/
 .editorconfig
 .scratch
 .worktrees/

AGENTS.md

@@ -2,14 +2,6 @@
 
 This repository is a monorepo. Each library lives in a subdirectory under `libs/`.
 
-<corridor>
-
-## Corridor security analysis
-
-When Corridor's `analyzePlan` tool is available, create a plan and use the tool to analyze it before generating or modifying code. Apply the resulting security guidance before writing code.
-
-</corridor>
-
 When you modify code in any library, run the following commands in that library's directory before creating a pull request:
 
 - `make format` – run code formatters

CLAUDE.md

@@ -0,0 +1,57 @@
+# AGENTS Instructions
+
+This repository is a monorepo. Each library lives in a subdirectory under `libs/`.
+
+When you modify code in any library, run the following commands in that library's directory before creating a pull request:
+
+- `make format` – run code formatters
+- `make lint` – run the linter
+- `make test` – execute the test suite
+
+To run a particular test file or to pass additional pytest options you can specify the `TEST` variable:
+
+```
+TEST=path/to/test.py make test
+```
+
+Other pytest arguments can also be supplied inside the `TEST` variable.
+
+## Libraries
+
+The repository contains several Python and JavaScript/TypeScript libraries.
+Below is a high-level overview:
+
+- **checkpoint** – base interfaces for LangGraph checkpointers.
+- **checkpoint-postgres** – Postgres implementation of the checkpoint saver.
+- **checkpoint-sqlite** – SQLite implementation of the checkpoint saver.
+- **cli** – official command-line interface for LangGraph.
+- **langgraph** – core framework for building stateful, multi-actor agents.
+- **prebuilt** – high-level APIs for creating and running agents and tools.
+- **sdk-js** – JS/TS SDK for interacting with the LangGraph REST API.
+- **sdk-py** – Python SDK for the LangGraph Server API.
+
+### Dependency map
+
+The diagram below lists downstream libraries for each production dependency as
+declared in that library's `pyproject.toml` (or `package.json`).
+
+```text
+checkpoint
+├── checkpoint-postgres
+├── checkpoint-sqlite
+├── prebuilt
+└── langgraph
+
+prebuilt
+└── langgraph
+
+sdk-py
+├── langgraph
+└── cli
+
+sdk-js (standalone)
+```
+
+Changes to a library may impact all of its dependents shown above.
+
+- Do NOT use Sphinx-style double backtick formatting (` ``code`` `). Use single backticks (`` `code` ``) for inline code references in docstrings and comments.

docs/generate_redirects.py

@@ -12,26 +12,13 @@ which is SEO-friendly and treated similarly to 301 redirects by Google.
 To add new redirects, simply edit redirects.json and re-run this script.
 """
 
-import http.client
 import json
 import os
-import urllib.error
-import urllib.parse
-import urllib.request
 from pathlib import Path
 
 # Default fallback URL for any path not in the redirect map
 DEFAULT_REDIRECT = "https://docs.langchain.com/oss/python/langgraph/overview"
 
-# The docs site regenerates this index on every deploy, so fetching it here
-# keeps the published llms.txt from drifting. The URL is a hardcoded constant,
-# never built from input, and both it and the post-redirect URL are checked
-# against ALLOWED_LLMS_HOST before anything is read.
-CANONICAL_LLMS_URL = "https://docs.langchain.com/oss/python/langgraph/llms.txt"
-ALLOWED_LLMS_HOST = "docs.langchain.com"
-LLMS_FETCH_TIMEOUT = 30
-LLMS_MAX_BYTES = 1_000_000
-
 HTML_TEMPLATE = """<!doctype html>
 <html lang="en">
 <head>
@@ -88,64 +75,6 @@ CATCHALL_404_TEMPLATE = """<!doctype html>
 """
 
 
-def is_allowed_llms_url(url):
-    """Return True if url is HTTPS on the one host we accept content from."""
-    parsed = urllib.parse.urlsplit(url)
-    return parsed.scheme == "https" and parsed.hostname == ALLOWED_LLMS_HOST
-
-
-def fetch_canonical_llms_txt():
-    """Return the published LangGraph index, or None if it cannot be used.
-
-    Returning None leaves the caller on the committed docs/llms.txt, so a
-    docs.langchain.com outage degrades to a stale file rather than a broken
-    deploy or a published error page.
-    """
-    if not is_allowed_llms_url(CANONICAL_LLMS_URL):
-        print(f"Refusing to fetch {CANONICAL_LLMS_URL}: host not allowed")
-        return None
-
-    try:
-        with urllib.request.urlopen(  # noqa: S310 - constant, allowlisted URL
-            CANONICAL_LLMS_URL, timeout=LLMS_FETCH_TIMEOUT
-        ) as response:
-            # urlopen follows redirects, so re-check where it actually landed.
-            if not is_allowed_llms_url(response.url):
-                print(f"Refusing {CANONICAL_LLMS_URL}: redirected to {response.url}")
-                return None
-            body = response.read(LLMS_MAX_BYTES + 1)
-    # A connection dropped mid-body raises http.client.IncompleteRead, which
-    # descends from HTTPException rather than OSError, so catching only the
-    # urllib and OS errors would let it escape and fail the whole deploy.
-    except (
-        urllib.error.URLError,
-        http.client.HTTPException,
-        TimeoutError,
-        OSError,
-    ) as exc:
-        print(f"Could not fetch {CANONICAL_LLMS_URL}: {type(exc).__name__}: {exc}")
-        return None
-
-    if len(body) > LLMS_MAX_BYTES:
-        print(f"Refusing {CANONICAL_LLMS_URL}: larger than {LLMS_MAX_BYTES} bytes")
-        return None
-
-    try:
-        text = body.decode("utf-8")
-    except UnicodeDecodeError as exc:
-        print(f"Refusing {CANONICAL_LLMS_URL}: not valid UTF-8: {exc}")
-        return None
-
-    # An index opens with a markdown heading and links to the docs site. A
-    # body that does not is an error page or a truncated response, not content
-    # worth publishing.
-    if not text.startswith("# ") or f"https://{ALLOWED_LLMS_HOST}/" not in text:
-        print(f"Refusing {CANONICAL_LLMS_URL}: does not look like an llms.txt index")
-        return None
-
-    return text
-
-
 def generate_redirects():
     script_dir = Path(__file__).parent
     output_dir = script_dir / "_site"
@@ -197,19 +126,14 @@ def generate_redirects():
     catchall_404.write_text(CATCHALL_404_TEMPLATE.format(default_url=DEFAULT_REDIRECT))
     print(f"Created: {catchall_404}")
 
-    # llms.txt can't be redirected via HTML, so publish the docs site's own
-    # generated index. The committed copy is only a fallback.
-    llms_txt = fetch_canonical_llms_txt()
-    if llms_txt is not None:
-        (output_dir / "llms.txt").write_text(llms_txt)
-        print(f"Fetched: {output_dir / 'llms.txt'} (from {CANONICAL_LLMS_URL})")
-    else:
-        src = script_dir / "llms.txt"
+    # Copy static files (like llms.txt) that can't be redirected via HTML
+    static_files = ["llms.txt"]
+    for static_file in static_files:
+        src = script_dir / static_file
         if src.exists():
-            (output_dir / "llms.txt").write_text(src.read_text())
-            print(f"Copied: {output_dir / 'llms.txt'} (fallback, may be stale)")
-        else:
-            print("No llms.txt fetched and no committed fallback; skipping")
+            dst = output_dir / static_file
+            dst.write_text(src.read_text())
+            print(f"Copied: {dst}")
 
     print(f"\nGenerated {len(redirects)} redirect files in {output_dir}")
 

docs/llms.txt

@@ -1,49 +1,35 @@
-# Docs by LangChain: LangGraph (Python)
+# LangGraph
 
-> Markdown index of the LangGraph (Python) documentation.
+LangGraph documentation has moved to docs.langchain.com.
 
-## LangGraph (Python)
+## Overview
 
-- [Memory](https://docs.langchain.com/oss/python/langgraph/add-memory.md)
-- [Build a custom RAG agent with LangGraph](https://docs.langchain.com/oss/python/langgraph/agentic-rag.md)
-- [Application structure](https://docs.langchain.com/oss/python/langgraph/application-structure.md)
-- [Backward compatibility](https://docs.langchain.com/oss/python/langgraph/backward-compatibility.md)
-- [Case studies](https://docs.langchain.com/oss/python/langgraph/case-studies.md)
-- [Changelog](https://docs.langchain.com/oss/python/langgraph/changelog-js.md)
-- [Changelog](https://docs.langchain.com/oss/python/langgraph/changelog-py.md)
-- [Checkpointers](https://docs.langchain.com/oss/python/langgraph/checkpointers.md)
-- [Choosing between Graph and Functional APIs](https://docs.langchain.com/oss/python/langgraph/choosing-apis.md)
-- [Deployment](https://docs.langchain.com/oss/python/langgraph/deploy.md)
-- [GRAPH_RECURSION_LIMIT](https://docs.langchain.com/oss/python/langgraph/errors/GRAPH_RECURSION_LIMIT.md)
-- [INVALID_CHAT_HISTORY](https://docs.langchain.com/oss/python/langgraph/errors/INVALID_CHAT_HISTORY.md)
-- [INVALID_CONCURRENT_GRAPH_UPDATE](https://docs.langchain.com/oss/python/langgraph/errors/INVALID_CONCURRENT_GRAPH_UPDATE.md)
-- [INVALID_GRAPH_NODE_RETURN_VALUE](https://docs.langchain.com/oss/python/langgraph/errors/INVALID_GRAPH_NODE_RETURN_VALUE.md)
-- [MISSING_CHECKPOINTER](https://docs.langchain.com/oss/python/langgraph/errors/MISSING_CHECKPOINTER.md)
-- [MULTIPLE_SUBGRAPHS](https://docs.langchain.com/oss/python/langgraph/errors/MULTIPLE_SUBGRAPHS.md)
-- [Event streaming](https://docs.langchain.com/oss/python/langgraph/event-streaming.md)
-- [Fault tolerance](https://docs.langchain.com/oss/python/langgraph/fault-tolerance.md)
-- [Custom stream channels](https://docs.langchain.com/oss/python/langgraph/frontend/custom-stream-channels.md)
-- [Graph execution](https://docs.langchain.com/oss/python/langgraph/frontend/graph-execution.md)
-- [Overview](https://docs.langchain.com/oss/python/langgraph/frontend/overview.md)
-- [Functional API overview](https://docs.langchain.com/oss/python/langgraph/functional-api.md)
-- [Graph API overview](https://docs.langchain.com/oss/python/langgraph/graph-api.md)
-- [Install LangGraph](https://docs.langchain.com/oss/python/langgraph/install.md)
-- [Interrupts](https://docs.langchain.com/oss/python/langgraph/interrupts.md)
-- [Run a local server](https://docs.langchain.com/oss/python/langgraph/local-server.md)
-- [LangSmith Observability](https://docs.langchain.com/oss/python/langgraph/observability.md)
-- [LangGraph overview](https://docs.langchain.com/oss/python/langgraph/overview.md)
-- [Persistence](https://docs.langchain.com/oss/python/langgraph/persistence.md)
-- [LangGraph runtime](https://docs.langchain.com/oss/python/langgraph/pregel.md)
-- [Quickstart](https://docs.langchain.com/oss/python/langgraph/quickstart.md)
-- [Build a custom SQL agent](https://docs.langchain.com/oss/python/langgraph/sql-agent.md)
-- [Stores](https://docs.langchain.com/oss/python/langgraph/stores.md)
-- [Streaming](https://docs.langchain.com/oss/python/langgraph/streaming.md)
-- [LangSmith Studio](https://docs.langchain.com/oss/python/langgraph/studio.md)
-- [Test](https://docs.langchain.com/oss/python/langgraph/test.md)
-- [Thinking in LangGraph](https://docs.langchain.com/oss/python/langgraph/thinking-in-langgraph.md)
-- [Agent Chat UI](https://docs.langchain.com/oss/python/langgraph/ui.md)
-- [Use the functional API](https://docs.langchain.com/oss/python/langgraph/use-functional-api.md)
-- [Use the graph API](https://docs.langchain.com/oss/python/langgraph/use-graph-api.md)
-- [Subgraphs](https://docs.langchain.com/oss/python/langgraph/use-subgraphs.md)
-- [Use time-travel](https://docs.langchain.com/oss/python/langgraph/use-time-travel.md)
-- [Workflows and agents](https://docs.langchain.com/oss/python/langgraph/workflows-agents.md)
+- [LangGraph Overview](https://docs.langchain.com/oss/python/langgraph/overview): Introduction to LangGraph, a library for building stateful, multi-actor applications with LLMs.
+- [Why LangGraph?](https://docs.langchain.com/oss/python/langgraph/why-langgraph): Motivation for LangGraph and its key features.
+
+## Core Concepts
+
+- [Graph API](https://docs.langchain.com/oss/python/langgraph/graph-api): Learn how to define state, create nodes, and connect them with edges.
+- [Streaming](https://docs.langchain.com/oss/python/langgraph/streaming): Stream outputs from your graph for better UX.
+- [Persistence](https://docs.langchain.com/oss/python/langgraph/persistence): Add memory and checkpointing to your graphs.
+- [Add Memory](https://docs.langchain.com/oss/python/langgraph/add-memory): Implement short-term and long-term memory.
+- [Workflows & Agents](https://docs.langchain.com/oss/python/langgraph/workflows-agents): Build agents and workflows with LangGraph.
+
+## How-To Guides
+
+- [Use Subgraphs](https://docs.langchain.com/oss/python/langgraph/use-subgraphs): Compose graphs using subgraphs.
+- [Observability](https://docs.langchain.com/oss/python/langgraph/observability): Add tracing and debugging to your graphs.
+- [Common Errors](https://docs.langchain.com/oss/python/langgraph/common-errors): Troubleshoot common LangGraph errors.
+
+## Tutorials
+
+- [Agentic RAG](https://docs.langchain.com/oss/python/langgraph/agentic-rag): Build an agentic RAG system with LangGraph.
+- [SQL Agent](https://docs.langchain.com/oss/python/langgraph/sql-agent): Create a SQL agent with LangGraph.
+
+## Reference
+
+- [API Reference](https://reference.langchain.com/python/langgraph/): Complete API documentation for LangGraph.
+
+## LangGraph Platform
+
+For deploying LangGraph applications in production, see the [LangSmith documentation](https://docs.langchain.com/langsmith/agent-server).

libs/checkpoint-conformance/langgraph/checkpoint/conformance/spec/test_delta_channel_history.py

@@ -267,61 +267,6 @@ async def test_history_seed_ancestor_own_writes_are_replayed(
     )
 
 
-# Every uuid4 `build_delta_chain` tags its own writes with sorts between these
-# two, so task_id order is fixed and always disagrees with task_path order.
-TASK_ID_SORTS_FIRST = "00000000-0000-0000-0000-000000000000"
-TASK_ID_SORTS_LAST = "ffffffff-ffff-ffff-ffff-ffffffffffff"
-
-
-async def test_history_orders_parallel_writes_by_task_path(
-    saver: BaseCheckpointSaver,
-) -> None:
-    """Writes from parallel tasks replay in task_path order, not task_id order."""
-    configs = await build_delta_chain(
-        saver,
-        thread_id=str(uuid4()),
-        channel="ch",
-        snapshots_at_steps=[0],
-        total_steps=3,
-    )
-    step_1, head = configs[1], configs[2]
-    await saver.aput_writes(
-        step_1, [("ch", "second")], TASK_ID_SORTS_FIRST, "~pull, 02"
-    )
-    await saver.aput_writes(step_1, [("ch", "first")], TASK_ID_SORTS_LAST, "~pull, 01")
-
-    result = await saver.aget_delta_channel_history(config=head, channels=["ch"])
-    values = [w[2] for w in result["ch"]["writes"]]
-    assert values == [1, "first", "second"], (
-        f"Expected task_path order [1, 'first', 'second'], got {values}. "
-        "Ordering by (task_id, idx) alone yields [1, 'second', 'first']."
-    )
-
-
-async def test_history_orders_pathless_writes_first(
-    saver: BaseCheckpointSaver,
-) -> None:
-    """Writes stored without a task_path (graph input) replay before task writes."""
-    configs = await build_delta_chain(
-        saver,
-        thread_id=str(uuid4()),
-        channel="ch",
-        snapshots_at_steps=[0],
-        total_steps=3,
-    )
-    step_1, head = configs[1], configs[2]
-    await saver.aput_writes(
-        step_1, [("ch", "from_node")], TASK_ID_SORTS_FIRST, "~pull, a"
-    )
-    await saver.aput_writes(step_1, [("ch", "from_input")], TASK_ID_SORTS_LAST)
-
-    result = await saver.aget_delta_channel_history(config=head, channels=["ch"])
-    values = [w[2] for w in result["ch"]["writes"]]
-    assert values == [1, "from_input", "from_node"], (
-        f"Expected pathless writes first, got {values}"
-    )
-
-
 ALL_DELTA_CHANNEL_HISTORY_TESTS = [
     test_history_returns_writes_oldest_first,
     test_history_seed_is_nearest_snapshot,
@@ -331,8 +276,6 @@ ALL_DELTA_CHANNEL_HISTORY_TESTS = [
     test_history_walk_to_root_no_seed,
     test_history_migration_plain_value_as_seed,
     test_history_seed_ancestor_own_writes_are_replayed,
-    test_history_orders_parallel_writes_by_task_path,
-    test_history_orders_pathless_writes_first,
 ]
 
 

libs/checkpoint-conformance/langgraph/checkpoint/conformance/spec/test_get_tuple.py

@@ -176,35 +176,6 @@ async def test_get_tuple_pending_writes(saver: BaseCheckpointSaver) -> None:
     )
 
 
-async def test_get_tuple_pending_writes_in_writes_sort_key_order(
-    saver: BaseCheckpointSaver,
-) -> None:
-    """pending_writes come back in writes_sort_key order, not put or task_id order."""
-    config = generate_config(str(uuid4()))
-    stored = await saver.aput(config, generate_checkpoint(), generate_metadata(), {})
-    await saver.aput_writes(
-        stored, [("ch", "b")], "00000000-0000-0000-0000-000000000000", "~pull, 02"
-    )
-    await saver.aput_writes(
-        stored,
-        [("ch", "a1"), ("ch", "a2")],
-        "ffffffff-ffff-ffff-ffff-ffffffffffff",
-        "~pull, 01",
-    )
-    await saver.aput_writes(
-        stored, [("ch", "input")], "88888888-8888-8888-8888-888888888888"
-    )
-
-    tup = await saver.aget_tuple(stored)
-    assert tup is not None
-    values = [w[2] for w in tup.pending_writes or []]
-    assert values == ["input", "a1", "a2", "b"], (
-        f"Expected writes_sort_key order ['input', 'a1', 'a2', 'b'], got {values}. "
-        "Put order gives ['b', 'a1', 'a2', 'input'], task_id order gives "
-        "['b', 'input', 'a1', 'a2']."
-    )
-
-
 async def test_get_tuple_respects_namespace(saver: BaseCheckpointSaver) -> None:
     """checkpoint_ns filtering."""
     tid = str(uuid4())
@@ -252,7 +223,6 @@ ALL_GET_TUPLE_TESTS = [
     test_get_tuple_metadata,
     test_get_tuple_parent_config,
     test_get_tuple_pending_writes,
-    test_get_tuple_pending_writes_in_writes_sort_key_order,
     test_get_tuple_respects_namespace,
     test_get_tuple_nonexistent_checkpoint_id,
 ]

libs/checkpoint-conformance/tests/test_validate_memory.py

@@ -14,8 +14,8 @@ async def memory_checkpointer():
 
 
 @pytest.mark.asyncio
-async def test_validate_memory():
-    """InMemorySaver passes the tests of every capability it implements."""
+async def test_validate_memory_base():
+    """InMemorySaver passes all base capability tests."""
     report = await validate(memory_checkpointer)
     report.print_report()
-    assert report.passed_all(), f"Capability tests failed: {report.to_dict()}"
+    assert report.passed_all_base(), f"Base tests failed: {report.to_dict()}"

libs/checkpoint-conformance/uv.lock

@@ -13,16 +13,16 @@ wheels = [
 
 [[package]]
 name = "anyio"
-version = "4.14.2"
+version = "4.13.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
     { name = "idna" },
     { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/19/14/2c5dd9f512b66549ae92767a9c7b330ae88e1932ca57876909410251fe13/anyio-4.13.0.tar.gz", hash = "sha256:334b70e641fd2221c1505b3890c69882fe4a2df910cba14d97019b90b24439dc", size = 231622, upload-time = "2026-03-24T12:59:09.671Z" }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/da/42/e921fccf5015463e32a3cf6ee7f980a6ed0f395ceeaa45060b61d86486c2/anyio-4.13.0-py3-none-any.whl", hash = "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708", size = 114353, upload-time = "2026-03-24T12:59:08.246Z" },
 ]
 
 [[package]]
@@ -162,7 +162,7 @@ name = "exceptiongroup"
 version = "1.3.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/50/79/66800aadf48771f6b62f7eb014e352e5d06856655206165d775e675a02c9/exceptiongroup-1.3.1.tar.gz", hash = "sha256:8b412432c6055b0b7d14c310000ae93352ed6754f70fa8f7c34141f91c4e3219", size = 30371, upload-time = "2025-11-21T23:01:54.787Z" }
 wheels = [
@@ -279,7 +279,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.3.0"
+version = "4.2.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
@@ -809,27 +809,27 @@ wheels = [
 
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 [[package]]

libs/checkpoint-postgres/langgraph/checkpoint/postgres/__init__.py

@@ -27,15 +27,10 @@ from psycopg_pool import ConnectionPool
 from langgraph.checkpoint.postgres import _internal
 from langgraph.checkpoint.postgres.base import (
     _DELTA_PAGE_SIZE,
-    PRUNE_DELETE_THREADS_SQL,
-    PRUNE_STRATEGIES,
     BasePostgresSaver,
     _build_delta_stage1_sql,
     _build_delta_stage2_sql,
     _DeltaStage2Row,
-    _execute,
-    _keep_latest,
-    _refuse_delta_threads,
 )
 from langgraph.checkpoint.postgres.shallow import ShallowPostgresSaver
 
@@ -406,73 +401,6 @@ class PostgresSaver(BasePostgresSaver):
                 (str(thread_id),),
             )
 
-    def prune(
-        self,
-        thread_ids: Sequence[str],
-        *,
-        strategy: str = "keep_latest",
-    ) -> None:
-        """Prune checkpoints for the given threads.
-
-        `"delete"` removes every checkpoint, write and blob of the threads, in
-        one transaction.
-
-        `"keep_latest"` keeps the latest checkpoint of each namespace (the one
-        `get_tuple` loads, plus its parent when it predates v4 and has pending
-        sends), with its pending writes and the blobs it references, and
-        deletes the rest. A kept checkpoint whose parent it deletes is left with
-        no parent. A subgraph call's namespace is deleted with the root
-        checkpoint the call started from, except a `checkpointer=True`
-        subgraph's, which keeps its latest checkpoint. Each thread is pruned in
-        its own transaction, on one snapshot of it, so a run appending to the
-        thread meanwhile is safe; forking or replaying from a checkpoint being
-        deleted is not. A thread that fails because another transaction changed
-        it leaves the threads before it pruned, and retrying is safe.
-
-        `"keep_latest"` refuses threads that use a `DeltaChannel`, since it
-        rebuilds the latest value from older checkpoints: if any requested
-        thread does, nothing is pruned. A thread that starts using one before
-        its turn in the batch is refused then, after the threads before it.
-
-        Args:
-            thread_ids: The thread IDs to prune.
-            strategy: `"keep_latest"` or `"delete"`.
-
-        Raises:
-            TypeError: If `thread_ids` is a single string.
-            ValueError: If `strategy` is unknown.
-            NotImplementedError: If `strategy` is `"keep_latest"` and a thread
-                uses a `DeltaChannel`.
-            psycopg.errors.SerializationFailure: If another transaction, such
-                as a second prune, changes a thread's rows while `"keep_latest"`
-                prunes it.
-            psycopg.errors.DeadlockDetected: If a second prune of a thread runs
-                at the same time.
-        """
-        if isinstance(thread_ids, str):
-            raise TypeError("thread_ids must be a sequence of thread IDs, not a str")
-        if strategy not in PRUNE_STRATEGIES:
-            raise ValueError(f"Unknown prune strategy: {strategy!r}")
-        thread_ids = [str(t) for t in thread_ids]
-        if not thread_ids:
-            return
-        if strategy == "delete":
-            with self._cursor() as cur, cur.connection.transaction():
-                for sql in PRUNE_DELETE_THREADS_SQL:
-                    cur.execute(sql, (thread_ids,))
-            return
-        with self._cursor() as cur:
-            _execute(cur, _refuse_delta_threads(thread_ids))
-        for thread_id in thread_ids:
-            with self._cursor() as cur:
-                if self.pipe:
-                    # The transaction has to start with its isolation level, and
-                    # in pipeline mode it would take in what ran since the last
-                    # sync.
-                    self.pipe.sync()
-                with cur.connection.transaction():
-                    _execute(cur, _keep_latest(thread_id))
-
     @contextmanager
     def _cursor(self, *, pipeline: bool = False) -> Iterator[Cursor[DictRow]]:
         """Create a database cursor as a context manager.
@@ -520,13 +448,11 @@ class PostgresSaver(BasePostgresSaver):
 
         Two-stage query, both stages cover ALL requested channels:
 
-        * Stage 1 (paged): dynamic SELECT over `checkpoints` with three
-          columns per channel: its version, an `EXISTS` probe for a stored
-          blob at that version, and its inline value. Pages newest-first by
-          `checkpoint_id`, starting at the target; page size is
-          `_DELTA_PAGE_SIZE`.
-          Stops paging when every channel has found its seed or a page comes
-          back short.
+        * Stage 1 (paged): dynamic SELECT over `checkpoints` with K parallel
+          JSONB key lookups (one column pair per channel) — no subquery, no
+          aggregation. Pages newest-first by `checkpoint_id` with a cursor;
+          page size is `_DELTA_PAGE_SIZE`. Stops paging when every channel
+          has found its seed or the chain is exhausted.
 
         * Stage 2 (per-channel UNION ALL): one branch per channel reading
           `checkpoint_writes` filtered to that channel's specific
@@ -541,7 +467,7 @@ class PostgresSaver(BasePostgresSaver):
         thread_id = config["configurable"]["thread_id"]
         checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
         checkpoint_id = get_checkpoint_id(config)
-        if not checkpoint_id:
+        if checkpoint_id is None:
             target = self.get_tuple(config)
             if target is None:
                 return {ch: {"writes": []} for ch in channels}
@@ -549,7 +475,7 @@ class PostgresSaver(BasePostgresSaver):
 
         # Stage 1: paged K-JSONB-lookup scan, walking the parent chain in
         # Python after each page. Stops as soon as every channel has its seed.
-        stage1_sql = _build_delta_stage1_sql(channels, paged=True, include_cursor=True)
+        stage1_sql = _build_delta_stage1_sql(channels, paged=True)
         parent_of: dict[str, str | None] = {}
         ver_by_i_by_cid: list[dict[str, str | None]] = [{} for _ in channels]
         hb_by_i_by_cid: list[dict[str, bool]] = [{} for _ in channels]
@@ -559,7 +485,7 @@ class PostgresSaver(BasePostgresSaver):
         seed_inline_by_ch: dict[str, Any] = {}
         walk_cursor_by_ch: dict[str, str | None] = {}
         seeded: set[str] = set()
-        cursor: str | None = checkpoint_id
+        cursor: str | None = None
 
         with self._cursor() as cur:
             while True:
@@ -568,7 +494,7 @@ class PostgresSaver(BasePostgresSaver):
                     # ver_i, blob channel, blob version, inline_i
                     stage1_params.extend([ch, ch, ch, ch])
                 stage1_params.extend(
-                    [thread_id, checkpoint_ns, cursor, _DELTA_PAGE_SIZE]
+                    [thread_id, checkpoint_ns, cursor, cursor, _DELTA_PAGE_SIZE]
                 )
                 cur.execute(stage1_sql, stage1_params)
                 page = cur.fetchall()
@@ -600,7 +526,6 @@ class PostgresSaver(BasePostgresSaver):
                 if len(seeded) == len(channels) or len(page) < _DELTA_PAGE_SIZE:
                     break
                 cursor = oldest
-                stage1_sql = _build_delta_stage1_sql(channels, paged=True)
 
         # Stage 2: per-channel UNION ALL — one writes branch per channel
         # with non-empty chain, plus one blob branch per seeded channel.

libs/checkpoint-postgres/langgraph/checkpoint/postgres/aio.py

@@ -27,15 +27,10 @@ from psycopg_pool import AsyncConnectionPool
 from langgraph.checkpoint.postgres import _ainternal
 from langgraph.checkpoint.postgres.base import (
     _DELTA_PAGE_SIZE,
-    PRUNE_DELETE_THREADS_SQL,
-    PRUNE_STRATEGIES,
     BasePostgresSaver,
-    _aexecute,
     _build_delta_stage1_sql,
     _build_delta_stage2_sql,
     _DeltaStage2Row,
-    _keep_latest,
-    _refuse_delta_threads,
 )
 from langgraph.checkpoint.postgres.shallow import AsyncShallowPostgresSaver
 
@@ -365,55 +360,6 @@ class AsyncPostgresSaver(BasePostgresSaver):
                 (str(thread_id),),
             )
 
-    async def aprune(
-        self,
-        thread_ids: Sequence[str],
-        *,
-        strategy: str = "keep_latest",
-    ) -> None:
-        """Prune checkpoints for the given threads.
-
-        See `PostgresSaver.prune` for what each strategy keeps.
-
-        Args:
-            thread_ids: The thread IDs to prune.
-            strategy: `"keep_latest"` or `"delete"`.
-
-        Raises:
-            TypeError: If `thread_ids` is a single string.
-            ValueError: If `strategy` is unknown.
-            NotImplementedError: If `strategy` is `"keep_latest"` and a thread
-                uses a `DeltaChannel`.
-            psycopg.errors.SerializationFailure: If another transaction, such
-                as a second prune, changes a thread's rows while `"keep_latest"`
-                prunes it.
-            psycopg.errors.DeadlockDetected: If a second prune of a thread runs
-                at the same time.
-        """
-        if isinstance(thread_ids, str):
-            raise TypeError("thread_ids must be a sequence of thread IDs, not a str")
-        if strategy not in PRUNE_STRATEGIES:
-            raise ValueError(f"Unknown prune strategy: {strategy!r}")
-        thread_ids = [str(t) for t in thread_ids]
-        if not thread_ids:
-            return
-        if strategy == "delete":
-            async with self._cursor() as cur, cur.connection.transaction():
-                for sql in PRUNE_DELETE_THREADS_SQL:
-                    await cur.execute(sql, (thread_ids,))
-            return
-        async with self._cursor() as cur:
-            await _aexecute(cur, _refuse_delta_threads(thread_ids))
-        for thread_id in thread_ids:
-            async with self._cursor() as cur:
-                if self.pipe:
-                    # The transaction has to start with its isolation level, and
-                    # in pipeline mode it would take in what ran since the last
-                    # sync.
-                    await self.pipe.sync()
-                async with cur.connection.transaction():
-                    await _aexecute(cur, _keep_latest(thread_id))
-
     @asynccontextmanager
     async def _cursor(
         self, *, pipeline: bool = False
@@ -471,13 +417,13 @@ class AsyncPostgresSaver(BasePostgresSaver):
         thread_id = config["configurable"]["thread_id"]
         checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
         checkpoint_id = get_checkpoint_id(config)
-        if not checkpoint_id:
+        if checkpoint_id is None:
             target = await self.aget_tuple(config)
             if target is None:
                 return {ch: {"writes": []} for ch in channels}
             checkpoint_id = target.config["configurable"]["checkpoint_id"]
 
-        stage1_sql = _build_delta_stage1_sql(channels, paged=True, include_cursor=True)
+        stage1_sql = _build_delta_stage1_sql(channels, paged=True)
         parent_of: dict[str, str | None] = {}
         ver_by_i_by_cid: list[dict[str, str | None]] = [{} for _ in channels]
         hb_by_i_by_cid: list[dict[str, bool]] = [{} for _ in channels]
@@ -487,7 +433,7 @@ class AsyncPostgresSaver(BasePostgresSaver):
         seed_inline_by_ch: dict[str, Any] = {}
         walk_cursor_by_ch: dict[str, str | None] = {}
         seeded: set[str] = set()
-        cursor: str | None = checkpoint_id
+        cursor: str | None = None
 
         async with self._cursor() as cur:
             while True:
@@ -496,7 +442,7 @@ class AsyncPostgresSaver(BasePostgresSaver):
                     # ver_i, blob channel, blob version, inline_i
                     stage1_params.extend([ch, ch, ch, ch])
                 stage1_params.extend(
-                    [thread_id, checkpoint_ns, cursor, _DELTA_PAGE_SIZE]
+                    [thread_id, checkpoint_ns, cursor, cursor, _DELTA_PAGE_SIZE]
                 )
                 await cur.execute(stage1_sql, stage1_params)
                 page = await cur.fetchall()
@@ -526,7 +472,6 @@ class AsyncPostgresSaver(BasePostgresSaver):
                 if len(seeded) == len(channels) or len(page) < _DELTA_PAGE_SIZE:
                     break
                 cursor = oldest
-                stage1_sql = _build_delta_stage1_sql(channels, paged=True)
 
         channels_with_chain = [ch for ch in channels if chain_by_ch[ch]]
         channels_with_seed = [ch for ch in channels if seed_ver_by_ch[ch] is not None]
@@ -742,50 +687,5 @@ class AsyncPostgresSaver(BasePostgresSaver):
             self.adelete_thread(thread_id), self.loop
         ).result()
 
-    def prune(
-        self,
-        thread_ids: Sequence[str],
-        *,
-        strategy: str = "keep_latest",
-    ) -> None:
-        """Prune checkpoints for the given threads.
-
-        See `PostgresSaver.prune` for what each strategy keeps.
-
-        Args:
-            thread_ids: The thread IDs to prune.
-            strategy: `"keep_latest"` or `"delete"`.
-        """
-        try:
-            if asyncio.get_running_loop() is self.loop:
-                raise asyncio.InvalidStateError(
-                    "Synchronous calls to AsyncPostgresSaver are only allowed from a "
-                    "different thread. From the main thread, use the async interface. "
-                    "For example, use `await checkpointer.aprune(...)`."
-                )
-        except RuntimeError:
-            pass
-        return asyncio.run_coroutine_threadsafe(
-            self.aprune(thread_ids, strategy=strategy), self.loop
-        ).result()
-
-    def get_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Sync bridge to `aget_delta_channel_history`, guarded like `get_tuple`."""
-        try:
-            if asyncio.get_running_loop() is self.loop:
-                raise asyncio.InvalidStateError(
-                    "Synchronous calls to AsyncPostgresSaver are only allowed from a "
-                    "different thread. From the main thread, use the async interface. "
-                    "For example, use `await checkpointer.aget_delta_channel_history(...)`."
-                )
-        except RuntimeError:
-            pass
-        return asyncio.run_coroutine_threadsafe(
-            self.aget_delta_channel_history(config=config, channels=channels),
-            self.loop,
-        ).result()
-
 
 __all__ = ["AsyncPostgresSaver", "AsyncShallowPostgresSaver", "Conn"]

libs/checkpoint-postgres/langgraph/checkpoint/postgres/base.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import random
 import warnings
-from collections.abc import Generator, Mapping, Sequence
+from collections.abc import Mapping, Sequence
 from importlib.metadata import version as get_version
 from typing import Any, TypedDict, cast
 
@@ -14,11 +14,8 @@ from langgraph.checkpoint.base import (
     DeltaChannelHistory,
     PendingWrite,
     get_checkpoint_id,
-    writes_sort_key,
 )
 from langgraph.checkpoint.serde.types import TASKS
-from psycopg import AsyncCursor, Cursor
-from psycopg.rows import DictRow
 from psycopg.types.json import Jsonb
 
 # Page size for stage-1 paged scan in `get_delta_channel_history`. Internal
@@ -112,7 +109,7 @@ select
     ) as channel_values,
     (
         select
-        array_agg(array[cw.task_id::text::bytea, cw.channel::bytea, cw.type::bytea, cw.blob, convert_to(cw.task_path, 'UTF8'), cw.idx::text::bytea])
+        array_agg(array[cw.task_id::text::bytea, cw.channel::bytea, cw.type::bytea, cw.blob] order by cw.task_id, cw.idx)
         from checkpoint_writes cw
         where cw.thread_id = checkpoints.thread_id
             and cw.checkpoint_ns = checkpoints.checkpoint_ns
@@ -162,218 +159,6 @@ INSERT_CHECKPOINT_WRITES_SQL = """
 """
 
 
-PRUNE_STRATEGIES = ("keep_latest", "delete")
-
-PRUNE_DELETE_THREADS_SQL = (
-    "DELETE FROM checkpoints WHERE thread_id = ANY(%s)",
-    "DELETE FROM checkpoint_blobs WHERE thread_id = ANY(%s)",
-    "DELETE FROM checkpoint_writes WHERE thread_id = ANY(%s)",
-)
-
-# The prune statements below never join two sets of a thread's rows: a join is
-# planned from per-thread row estimates, which are worst for the few huge
-# threads worth pruning, and can go quadratic. They look rows up by primary key
-# instead (`LATERAL ... LIMIT 1`, `= ANY`).
-
-# A `DeltaChannel` leaves update counters in checkpoint metadata, or a
-# snapshot: an inline `true` marker with a blob behind it, which a plain `True`
-# value never has. LangGraph.js inlines no values, but marks the threads its
-# DeltaChannel graphs start with `delta_writes_versioned`.
-PRUNE_DELTA_THREADS_SQL = """
-SELECT thread_id FROM checkpoints
-WHERE thread_id = ANY(%s) AND (
-    metadata ? 'counters_since_delta_snapshot'
-    OR metadata ? 'delta_writes_versioned'
-)
-UNION
-SELECT c.thread_id
-FROM checkpoints c
-CROSS JOIN LATERAL jsonb_each(c.checkpoint -> 'channel_values') AS v
-CROSS JOIN LATERAL (
-    SELECT 1 FROM checkpoint_blobs b
-    WHERE b.thread_id = c.thread_id
-    AND b.checkpoint_ns = c.checkpoint_ns
-    AND b.channel = v.key
-    AND b.version = c.checkpoint -> 'channel_versions' ->> v.key
-    LIMIT 1
-) AS snapshot
-WHERE c.thread_id = ANY(%s) AND v.value = 'true'::jsonb
-"""
-
-# Per namespace: the latest checkpoint, the parent it reads its pending sends
-# from when it predates v4, and the root graph's checkpoint its subgraph call
-# started from, with whether that one is saved.
-PRUNE_HEADS_SQL = f"""
-SELECT
-    h.checkpoint_ns,
-    h.checkpoint_id AS head,
-    CASE WHEN (c.checkpoint ->> 'v')::int < 4 AND EXISTS (
-        SELECT 1 FROM checkpoint_writes w
-        WHERE w.thread_id = %s
-        AND w.checkpoint_ns = h.checkpoint_ns
-        AND w.checkpoint_id = c.parent_checkpoint_id
-        AND w.channel = '{TASKS}'
-    ) THEN c.parent_checkpoint_id END AS sends_parent,
-    c.metadata -> 'parents' ->> '' AS root,
-    EXISTS (
-        SELECT 1 FROM checkpoints r
-        WHERE r.thread_id = %s AND r.checkpoint_ns = ''
-        AND r.checkpoint_id = c.metadata -> 'parents' ->> ''
-    ) AS root_saved
-FROM (
-    SELECT DISTINCT ON (checkpoint_ns) checkpoint_ns, checkpoint_id
-    FROM checkpoints
-    WHERE thread_id = %s
-    ORDER BY checkpoint_ns DESC, checkpoint_id DESC
-) AS h
-CROSS JOIN LATERAL (
-    SELECT checkpoint, parent_checkpoint_id, metadata FROM checkpoints
-    WHERE thread_id = %s
-    AND checkpoint_ns = h.checkpoint_ns
-    AND checkpoint_id = h.checkpoint_id
-) AS c
-"""
-
-PRUNE_SNAPSHOT_SQL = "SET TRANSACTION ISOLATION LEVEL REPEATABLE READ"
-
-PRUNE_UNKEPT_SQL = """
-SELECT checkpoint_id FROM checkpoints
-WHERE thread_id = %s AND checkpoint_ns = %s AND checkpoint_id <> ALL(%s)
-"""
-
-# A run saves a superstep's writes in the background, where they can commit
-# before their checkpoint does, so they go by the checkpoints deleted.
-PRUNE_WRITES_SQL = """
-DELETE FROM checkpoint_writes
-WHERE thread_id = %s AND checkpoint_ns = %s AND checkpoint_id = ANY(%s)
-"""
-
-PRUNE_CHECKPOINTS_SQL = """
-WITH deleted AS (
-    DELETE FROM checkpoints
-    WHERE thread_id = %s AND checkpoint_ns = %s AND checkpoint_id <> ALL(%s)
-    RETURNING checkpoint -> 'channel_versions' AS versions
-)
-SELECT DISTINCT v.key AS channel, v.value AS version
-FROM deleted
-CROSS JOIN LATERAL jsonb_each_text(deleted.versions) AS v
-"""
-
-PRUNE_PARENTS_SQL = """
-UPDATE checkpoints SET parent_checkpoint_id = NULL
-WHERE thread_id = %s AND checkpoint_ns = %s
-AND checkpoint_id = ANY(%s) AND parent_checkpoint_id <> ALL(%s)
-"""
-
-PRUNE_REFERENCED_BLOBS_SQL = """
-SELECT DISTINCT v.key AS channel, v.value AS version
-FROM checkpoints c
-CROSS JOIN LATERAL jsonb_each_text(c.checkpoint -> 'channel_versions') AS v
-WHERE c.thread_id = %s AND c.checkpoint_ns = %s
-"""
-
-PRUNE_BLOBS_SQL = """
-DELETE FROM checkpoint_blobs
-WHERE thread_id = %s AND checkpoint_ns = %s AND channel = %s AND version = ANY(%s)
-"""
-
-PRUNE_SUBGRAPH_CALLS_SQL = (
-    "DELETE FROM checkpoints WHERE thread_id = %s AND checkpoint_ns = ANY(%s)",
-    "DELETE FROM checkpoint_writes WHERE thread_id = %s AND checkpoint_ns = ANY(%s)",
-    "DELETE FROM checkpoint_blobs WHERE thread_id = %s AND checkpoint_ns = ANY(%s)",
-)
-
-
-def _garbage_blobs(
-    freed: Sequence[Mapping[str, Any]], referenced: Sequence[Mapping[str, Any]]
-) -> dict[str, list[str]]:
-    """Blobs a deleted checkpoint used and no kept one does, by channel."""
-    kept = {(r["channel"], r["version"]) for r in referenced}
-    garbage: dict[str, list[str]] = {}
-    for r in freed:
-        if (r["channel"], r["version"]) not in kept:
-            garbage.setdefault(r["channel"], []).append(r["version"])
-    return garbage
-
-
-_Statements = Generator[tuple[str, Sequence[Any], bool], list[DictRow], None]
-
-
-def _refuse_delta_threads(thread_ids: Sequence[str]) -> _Statements:
-    rows = yield PRUNE_DELTA_THREADS_SQL, (thread_ids, thread_ids), True
-    if delta := sorted(r["thread_id"] for r in rows):
-        raise NotImplementedError(
-            f"keep_latest can't prune threads that use a DeltaChannel: {', '.join(delta)}"
-        )
-
-
-def _keep_latest(thread_id: str) -> _Statements:
-    """The statements of one thread's keep_latest transaction, for `_execute`
-    and `_aexecute` to run. Each comes with whether its rows are sent back.
-
-    They all read one snapshot, so what a run saves meanwhile is neither seen
-    nor deleted, whatever its checkpoint ID.
-    """
-    yield PRUNE_SNAPSHOT_SQL, (), False
-    heads = yield PRUNE_HEADS_SQL, (thread_id,) * 4, True
-    # Catches a thread that started using a DeltaChannel after the batch check.
-    yield from _refuse_delta_threads([thread_id])
-    kept = {
-        h["checkpoint_ns"]: [i for i in (h["head"], h["sends_parent"]) if i]
-        for h in heads
-    }
-    # A subgraph call's namespace has its task ID after a ":", unlike a
-    # `checkpointer=True` subgraph's, whose state outlives each call. A call
-    # goes with the root checkpoint it started from, but only once that one is
-    # saved: runs save in the background, so a call can commit first.
-    calls = {
-        h["checkpoint_ns"]
-        for h in heads
-        if ":" in h["checkpoint_ns"]
-        and h["root_saved"]
-        and h["root"] not in kept.get("", ())
-    }
-    if calls:
-        for sql in PRUNE_SUBGRAPH_CALLS_SQL:
-            yield sql, (thread_id, list(calls)), False
-    for ns, ids in kept.items():
-        if ns in calls:
-            continue
-        unkept = yield PRUNE_UNKEPT_SQL, (thread_id, ns, ids), True
-        if unkept:
-            deleted = [r["checkpoint_id"] for r in unkept]
-            yield PRUNE_WRITES_SQL, (thread_id, ns, deleted), False
-        freed = yield PRUNE_CHECKPOINTS_SQL, (thread_id, ns, ids), True
-        yield PRUNE_PARENTS_SQL, (thread_id, ns, ids, ids), False
-        if freed:
-            referenced = yield PRUNE_REFERENCED_BLOBS_SQL, (thread_id, ns), True
-            for channel, versions in _garbage_blobs(freed, referenced).items():
-                yield PRUNE_BLOBS_SQL, (thread_id, ns, channel, versions), False
-
-
-# Unprepared, so Postgres plans each statement knowing its arrays: a cached
-# generic plan checks a row against an `= ANY(...)` array one element at a time.
-def _execute(cur: Cursor[DictRow], statements: _Statements) -> None:
-    try:
-        sql, params, fetch = next(statements)
-        while True:
-            cur.execute(sql, params, prepare=False)
-            sql, params, fetch = statements.send(cur.fetchall() if fetch else [])
-    except StopIteration:
-        pass
-
-
-async def _aexecute(cur: AsyncCursor[DictRow], statements: _Statements) -> None:
-    try:
-        sql, params, fetch = next(statements)
-        while True:
-            await cur.execute(sql, params, prepare=False)
-            rows = await cur.fetchall() if fetch else []
-            sql, params, fetch = statements.send(rows)
-    except StopIteration:
-        pass
-
-
 class _DeltaStage2Row(TypedDict, total=False):
     """One row from `_build_delta_stage2_sql` (a UNION ALL of writes and blobs)."""
 
@@ -383,22 +168,40 @@ class _DeltaStage2Row(TypedDict, total=False):
     type: str | None
     blob: bytes | None
     task_id: str | None  # "w" rows only
-    task_path: str | None  # "w" rows only
     idx: int | None  # "w" rows only
     version: str | None  # "b" rows only
 
 
-# Delta history is rebuilt in two queries; `_build_delta_stage1_sql` and
-# `_build_delta_stage2_sql` document their shapes.
+# Multi-channel two-stage DeltaChannel reconstruction.
+#
+# Stage 1 scans checkpoint metadata (no blob bytes) and emits one row per
+# checkpoint with K parallel JSONB key lookups (one column pair per
+# requested delta channel: ver_i / hs_i).  No subqueries, no aggregation.
+# Python walks the parent chain once across all channels.
+#
+# Stage 2 fetches all writes and the seed blobs for ALL channels in a
+# single roundtrip via `channel = ANY(%s)` and chain/seed-version
+# filtering.
+#
+# Empirical comparison vs an alternative "ship full channel_versions /
+# channel_values JSONB and let Python pick" form (1000 checkpoints,
+# 8 total channels in graph, 3 delta channels requested):
+#
+#   Postgres execution:    A=0.24ms vs B=0.38ms   (both negligible)
+#   End-to-end latency:    A=6.83ms vs B=2.28ms   (B is 3.0x faster)
+#   Wire payload:          A=836KB  vs B=330KB    (61% smaller)
+#   Buffer hits:           identical (167 blocks)
+#
+# B (this dynamic-columns design) wins because it avoids JSONB
+# serialization on the wire and JSONB-to-dict deserialization in
+# psycopg.  Even at K=8 (8 delta channels = 16 dynamic columns), B
+# still beats A end-to-end (4.2ms vs 6.8ms).
 
 
-def _build_delta_stage1_sql(
-    channels: Sequence[str], *, paged: bool, include_cursor: bool = False
-) -> str:
+def _build_delta_stage1_sql(channels: Sequence[str], *, paged: bool) -> str:
     """Build stage 1 SQL with K parallel version lookups + seed probes.
 
-    For channels=["messages", "files"] (with `paged=True, include_cursor=True`)
-    the result is::
+    For channels=["messages", "files"] (with `paged=True`) the result is::
 
         SELECT checkpoint_id, parent_checkpoint_id,
                checkpoint -> 'channel_versions' ->> %s AS ver_0,
@@ -414,7 +217,7 @@ def _build_delta_stage1_sql(
                checkpoint -> 'channel_values' -> %s AS inline_1
         FROM checkpoints
         WHERE thread_id = %s AND checkpoint_ns = %s
-          AND checkpoint_id <= %s
+          AND (%s::text IS NULL OR checkpoint_id < %s)
         ORDER BY checkpoint_id DESC
         LIMIT %s
 
@@ -455,16 +258,9 @@ def _build_delta_stage1_sql(
     and uses safe identifiers).
 
     Caller must extend params with `[ch_0 x4, ch_1 x4, ..., thread_id, ns,
-    cursor, page_size]` when `paged=True` — four per channel: the version
-    lookup, the blob's channel, the version the blob must match, and the inline
-    lookup.
-
-    Pages run newest-first from the target down. The first page passes the
-    target as the cursor with `include_cursor=True`, so it opens with the
-    target's own row, whose parent starts the walk; each later page continues
-    below the oldest row read. A checkpoint's ancestors have smaller ids (uuid6
-    is time-ordered, which `get_tuple` also relies on to find the latest
-    checkpoint), so no row newer than the target is part of its chain.
+    cursor, cursor, page_size]` when `paged=True` — four per channel: the
+    version lookup, the blob's channel, the version the blob must match, and the
+    inline lookup.
 
     When `paged=False`, the WHERE has no cursor predicate and there's no
     LIMIT/ORDER BY — kept as a non-public helper for tests/diagnostics.
@@ -488,7 +284,7 @@ def _build_delta_stage1_sql(
     )
     if paged:
         sql += (
-            f" AND checkpoint_id {'<=' if include_cursor else '<'} %s"
+            " AND (%s::text IS NULL OR checkpoint_id < %s)"
             " ORDER BY checkpoint_id DESC LIMIT %s"
         )
     return sql
@@ -523,7 +319,7 @@ def _build_delta_stage2_sql(
         branches.append(
             "SELECT 'w'::text AS _kind, "
             "checkpoint_id, channel, "
-            "type, blob, task_id, task_path, idx, NULL::text AS version "
+            "type, blob, task_id, idx, NULL::text AS version "
             "FROM checkpoint_writes "
             "WHERE thread_id = %s AND checkpoint_ns = %s AND channel = %s "
             "AND checkpoint_id = ANY(%s)"
@@ -531,8 +327,7 @@ def _build_delta_stage2_sql(
     for _ in channels_with_seed:
         branches.append(
             "SELECT 'b'::text AS _kind, NULL::text AS checkpoint_id, channel, "
-            "type, blob, NULL::text AS task_id, NULL::text AS task_path, "
-            "NULL::int AS idx, version "
+            "type, blob, NULL::text AS task_id, NULL::int AS idx, version "
             "FROM checkpoint_blobs "
             "WHERE thread_id = %s AND checkpoint_ns = %s AND channel = %s "
             "AND version = %s"
@@ -540,8 +335,10 @@ def _build_delta_stage2_sql(
     return " UNION ALL ".join(branches)
 
 
-# Stage 1 rows are dicts keyed by the per-channel aliases
-# `_build_delta_stage1_sql` emits, so there is no static TypedDict.
+# Stage 1 rows are dynamic-shape dicts: {checkpoint_id, parent_checkpoint_id,
+# ver_0, hs_0, ver_1, hs_1, ...}.  Walking is parameterized by the channel
+# list to map indices back to channel names — no static TypedDict here.
+# `dict[str, Any]` is the practical signature.
 
 
 class BasePostgresSaver(BaseCheckpointSaver[str]):
@@ -634,11 +431,9 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
           (a) it found a stored value for its channel — a blob or an inline
               primitive (channel becomes seeded),
           (b) it reached a real root (parent_of[cid] is None — fully
-              materialized at this point),
+              materialized at this point), or
           (c) the next ancestor cid isn't in `parent_of` yet (waiting for
-              a later page; the cursor stays put), or
-          (d) the target's own row isn't in `parent_of` (the target doesn't
-              exist, so the walk never starts).
+              a later page; the cursor stays put).
 
         Mutates `chain_by_ch`, `seed_ver_by_ch`, `seed_inline_by_ch`,
         `walk_cursor_by_ch`, and `seeded` in place.
@@ -646,13 +441,9 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
         for i, ch in enumerate(channels):
             if ch in seeded:
                 continue
-            # The first page opens with the target's row, so it's missing only
-            # when the target doesn't exist; a `None` cursor would read as
-            # "target is a root".
+            # First-time entry: cursor starts at the target's parent.
             if ch not in walk_cursor_by_ch:
-                if target_id not in parent_of:
-                    continue
-                walk_cursor_by_ch[ch] = parent_of[target_id]
+                walk_cursor_by_ch[ch] = parent_of.get(target_id)
             cur_cid = walk_cursor_by_ch[ch]
             ch_chain = chain_by_ch[ch]
             hb_i = hb_by_i_by_cid[i]
@@ -701,11 +492,10 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
         stored value, or when the seed blob is sentinel "empty" — in both cases
         the consumer treats absence as "start empty".
         """
-        # writes_by_ch_by_cid[channel][cid] = list of
-        # (type, blob, task_id, idx, task_path)
-        writes_by_ch_by_cid: dict[
-            str, dict[str, list[tuple[str, bytes, str, int, str]]]
-        ] = {ch: {} for ch in channels}
+        # writes_by_ch_by_cid[channel][cid] = list of (type, blob, task_id, idx)
+        writes_by_ch_by_cid: dict[str, dict[str, list[tuple[str, bytes, str, int]]]] = {
+            ch: {} for ch in channels
+        }
         # seed_blob_by_ver[(channel, version)] = (type, blob)
         seed_blob_by_ver: dict[tuple[str, str], tuple[str, bytes]] = {}
 
@@ -716,14 +506,8 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
                 cid = cast(str, r["checkpoint_id"])
                 writes_by_ch_by_cid.setdefault(ch, {}).setdefault(cid, []).append(
                     cast(
-                        "tuple[str, bytes, str, int, str]",
-                        (
-                            r["type"],
-                            r["blob"],
-                            r["task_id"],
-                            r["idx"],
-                            r["task_path"],
-                        ),
+                        "tuple[str, bytes, str, int]",
+                        (r["type"], r["blob"], r["task_id"], r["idx"]),
                     )
                 )
             else:  # kind == "b"
@@ -732,10 +516,10 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
                     "tuple[str, bytes]", (r["type"], r["blob"])
                 )
 
-        # Sort writes per (channel, cid) newest-first
+        # Sort writes per (channel, cid) newest-first by (task_id, idx)
         for cid_map in writes_by_ch_by_cid.values():
             for ws in cid_map.values():
-                ws.sort(key=lambda w: writes_sort_key(w[4], w[2], w[3]), reverse=True)
+                ws.sort(key=lambda w: (w[2], w[3]), reverse=True)
 
         result: dict[str, DeltaChannelHistory] = {}
         for ch in channels:
@@ -745,9 +529,7 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
             collected: list[PendingWrite] = []
             cid_writes = writes_by_ch_by_cid.get(ch, {})
             for cid in chain_cids:
-                for type_tag, write_blob, task_id, _idx, _path in cid_writes.get(
-                    cid, []
-                ):
+                for type_tag, write_blob, task_id, _idx in cid_writes.get(cid, []):
                     val = self.serde.loads_typed((type_tag, write_blob))
                     collected.append((task_id, ch, val))
             collected.reverse()
@@ -790,15 +572,20 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
         ]
 
     def _load_writes(
-        self, writes: list[tuple[bytes, bytes, bytes, bytes, bytes, bytes]] | None
+        self, writes: list[tuple[bytes, bytes, bytes, bytes]]
     ) -> list[tuple[str, str, Any]]:
-        return [
-            (tid.decode(), channel.decode(), self.serde.loads_typed((t.decode(), v)))
-            for tid, channel, t, v, _, _ in sorted(
-                writes or [],
-                key=lambda w: writes_sort_key(w[4].decode(), w[0].decode(), int(w[5])),
-            )
-        ]
+        return (
+            [
+                (
+                    tid.decode(),
+                    channel.decode(),
+                    self.serde.loads_typed((t.decode(), v)),
+                )
+                for tid, channel, t, v in writes
+            ]
+            if writes
+            else []
+        )
 
     def _dump_writes(
         self,

libs/checkpoint-postgres/langgraph/checkpoint/postgres/shallow.py

@@ -97,7 +97,7 @@ select
     ) as channel_values,
     (
         select
-        array_agg(array[cw.task_id::text::bytea, cw.channel::bytea, cw.type::bytea, cw.blob, convert_to(cw.task_path, 'UTF8'), cw.idx::text::bytea])
+        array_agg(array[cw.task_id::text::bytea, cw.channel::bytea, cw.type::bytea, cw.blob] order by cw.task_id, cw.idx)
         from checkpoint_writes cw
         where cw.thread_id = checkpoints.thread_id
             and cw.checkpoint_ns = checkpoints.checkpoint_ns

libs/checkpoint-postgres/langgraph/store/postgres/base.py

@@ -7,7 +7,7 @@ import logging
 import re
 import threading
 from collections import defaultdict
-from collections.abc import Callable, Iterable, Iterator, Mapping, Sequence
+from collections.abc import Callable, Iterable, Iterator, Sequence
 from contextlib import contextmanager
 from datetime import datetime
 from typing import (
@@ -36,7 +36,6 @@ from langgraph.store.base import (
     ensure_embeddings,
     get_text_at_path,
     tokenize_path,
-    validate_op_namespace,
 )
 from psycopg import Capabilities, Connection, Cursor, Pipeline
 from psycopg.rows import DictRow, dict_row
@@ -355,7 +354,7 @@ class BasePostgresStore(Generic[C]):
                     (
                         _namespace_to_text(op.namespace),
                         op.key,
-                        Jsonb(dict(cast(Mapping[str, Any], op.value))),
+                        Jsonb(cast(dict, op.value)),
                     )
                 )
                 if op.ttl is not None:
@@ -1387,7 +1386,6 @@ def _group_ops(ops: Iterable[Op]) -> tuple[dict[type, list[tuple[int, Op]]], int
     grouped_ops: dict[type, list[tuple[int, Op]]] = defaultdict(list)
     tot = 0
     for idx, op in enumerate(ops):
-        validate_op_namespace(op)
         grouped_ops[type(op)].append((idx, op))
         tot += 1
     return grouped_ops, tot

libs/checkpoint-postgres/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint-postgres"
-version = "3.2.0"
+version = "3.1.2"
 description = "Library with a Postgres implementation of LangGraph checkpoint saver."
 authors = []
 requires-python = ">=3.10"
@@ -12,7 +12,7 @@ readme = "README.md"
 license = "MIT"
 license-files = ['LICENSE']
 dependencies = [
-  "langgraph-checkpoint>=4.3.0,<5.0.0",
+  "langgraph-checkpoint>=4.1.0,<5.0.0",
   "orjson>=3.11.5",
   "psycopg>=3.2.0",
   "psycopg-pool>=3.2.0",

libs/checkpoint-postgres/tests/test_async_store.py

@@ -13,10 +13,8 @@ import pytest
 from langchain_core.embeddings import Embeddings
 from langgraph.store.base import (
     GetOp,
-    InvalidNamespaceError,
     Item,
     ListNamespacesOp,
-    MatchCondition,
     PutOp,
     SearchOp,
 )
@@ -873,65 +871,3 @@ async def test_omit_expired_search_pagination(store: AsyncPostgresStore) -> None
     page2 = await store.asearch(ns, limit=2, offset=2)
     assert [i.key for i in page1] == ["a", "b"]
     assert [i.key for i in page2] == ["c"]
-
-
-@pytest.mark.parametrize("namespace", [("foo.bar",), ("foo", ""), ("foo", 1)])
-async def test_abatch_rejects_invalid_namespace_labels(
-    store: AsyncPostgresStore, namespace: tuple
-) -> None:
-    await store.aput(("foo", "bar"), "key", {"original": True})
-
-    for op in (
-        GetOp(namespace, "key"),
-        GetOp(namespace, "key", refresh_ttl=True),
-        PutOp(namespace, "key", {"changed": True}),
-        PutOp(namespace, "key", None),
-        SearchOp(namespace),
-        ListNamespacesOp((MatchCondition("prefix", namespace),)),
-        ListNamespacesOp((MatchCondition("suffix", namespace),)),
-    ):
-        with pytest.raises(InvalidNamespaceError):
-            await store.abatch([op])
-
-    item = await store.aget(("foo", "bar"), "key")
-    assert item is not None and item.value == {"original": True}
-
-
-async def test_invalid_namespace_only_fails_its_own_call(
-    store: AsyncPostgresStore,
-) -> None:
-    """Concurrent calls share one `abatch`, which fails every op if it raises.
-
-    Labels are checked before an op is queued, so one caller's bad label cannot
-    fail another caller's request.
-    """
-    await store.aput(("foo", "bar"), "key", {"original": True})
-
-    valid, invalid = await asyncio.gather(
-        store.aget(("foo", "bar"), "key"),
-        store.aget(("foo.bar",), "key"),
-        return_exceptions=True,
-    )
-
-    assert isinstance(valid, Item) and valid.value == {"original": True}
-    assert isinstance(invalid, InvalidNamespaceError)
-
-
-async def test_sync_methods_reject_invalid_namespace_labels(
-    store: AsyncPostgresStore,
-) -> None:
-    """The sync wrappers run off the event loop thread and must validate too."""
-    await store.aput(("foo", "bar"), "key", {"original": True})
-
-    for call in (
-        lambda: store.get(("foo.bar",), "key"),
-        lambda: store.search(("foo.bar",)),
-        lambda: store.delete(("foo.bar",), "key"),
-        lambda: store.list_namespaces(prefix=("foo.bar",)),
-        lambda: store.batch([GetOp(("foo.bar",), "key")]),
-    ):
-        with pytest.raises(InvalidNamespaceError):
-            await asyncio.to_thread(call)
-
-    item = await store.aget(("foo", "bar"), "key")
-    assert item is not None and item.value == {"original": True}

libs/checkpoint-postgres/tests/test_delta_pagination.py

@@ -1,211 +0,0 @@
-from __future__ import annotations
-
-from collections.abc import Mapping, Sequence
-from typing import Any
-from uuid import uuid4
-
-import pytest
-from langgraph.checkpoint.base import (
-    Checkpoint,
-    DeltaChannelHistory,
-    empty_checkpoint,
-)
-from langgraph.checkpoint.base.id import uuid6
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
-
-from langgraph.checkpoint.postgres import PostgresSaver
-from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
-from langgraph.checkpoint.postgres.base import _DELTA_PAGE_SIZE, BasePostgresSaver
-from tests.conftest import DEFAULT_URI
-
-CHANNEL = "items"
-STEPS = 8
-SEED_STEP = 1
-SEED_VALUE = [10, 20]
-TARGET_STEP = 4
-
-# The real page size is the control; the rest split the walk from the target
-# to its seed across pages.
-PAGE_SIZES = [_DELTA_PAGE_SIZE, 3, 2, 1]
-
-
-def _step_args(
-    thread_id: str, step: int, parent: dict | None
-) -> tuple[dict, Checkpoint, dict[str, Any]]:
-    config: dict = {"configurable": {"thread_id": thread_id, "checkpoint_ns": ""}}
-    if parent is not None:
-        config["configurable"]["checkpoint_id"] = parent["configurable"][
-            "checkpoint_id"
-        ]
-    checkpoint: Checkpoint = empty_checkpoint()
-    checkpoint["id"] = str(uuid6(clock_seq=step))
-    checkpoint["channel_versions"][CHANNEL] = f"v{step}"
-    if step == SEED_STEP:
-        checkpoint["channel_values"][CHANNEL] = _DeltaSnapshot(list(SEED_VALUE))
-        return config, checkpoint, {CHANNEL: f"v{step}"}
-    return config, checkpoint, {}
-
-
-async def _abuild_chain(saver: AsyncPostgresSaver) -> list[dict]:
-    thread_id = str(uuid4())
-    parent: dict | None = None
-    configs: list[dict] = []
-    for step in range(STEPS):
-        config, checkpoint, new_versions = _step_args(thread_id, step, parent)
-        parent = await saver.aput(
-            config,
-            checkpoint,
-            {"source": "loop", "step": step, "parents": {}},
-            new_versions,
-        )
-        await saver.aput_writes(parent, [(CHANNEL, f"w{step}")], str(uuid4()))
-        configs.append(parent)
-    return configs
-
-
-def _build_chain(saver: PostgresSaver) -> list[dict]:
-    thread_id = str(uuid4())
-    parent: dict | None = None
-    configs: list[dict] = []
-    for step in range(STEPS):
-        config, checkpoint, new_versions = _step_args(thread_id, step, parent)
-        parent = saver.put(
-            config,
-            checkpoint,
-            {"source": "loop", "step": step, "parents": {}},
-            new_versions,
-        )
-        saver.put_writes(parent, [(CHANNEL, f"w{step}")], str(uuid4()))
-        configs.append(parent)
-    return configs
-
-
-def _assert_history(entry: DeltaChannelHistory, page_size: int) -> None:
-    seed = entry.get("seed")
-    assert isinstance(seed, _DeltaSnapshot), (
-        f"page_size={page_size}: expected a snapshot seed, "
-        f"got {entry.get('seed', '<missing>')!r}"
-    )
-    assert seed.value == SEED_VALUE
-    assert [w[2] for w in entry["writes"]] == ["w1", "w2", "w3"], (
-        f"page_size={page_size}: got {[w[2] for w in entry['writes']]}"
-    )
-
-
-@pytest.mark.parametrize("page_size", PAGE_SIZES)
-async def test_async_walk_continues_across_pages(
-    page_size: int, monkeypatch: pytest.MonkeyPatch
-) -> None:
-    monkeypatch.setattr("langgraph.checkpoint.postgres.aio._DELTA_PAGE_SIZE", page_size)
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-        configs = await _abuild_chain(saver)
-        result = await saver.aget_delta_channel_history(
-            config=configs[TARGET_STEP], channels=[CHANNEL]
-        )
-        _assert_history(result[CHANNEL], page_size)
-
-
-@pytest.mark.parametrize("page_size", PAGE_SIZES)
-def test_sync_walk_continues_across_pages(
-    page_size: int, monkeypatch: pytest.MonkeyPatch
-) -> None:
-    monkeypatch.setattr("langgraph.checkpoint.postgres._DELTA_PAGE_SIZE", page_size)
-    with PostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        saver.setup()
-        configs = _build_chain(saver)
-        result = saver.get_delta_channel_history(
-            config=configs[TARGET_STEP], channels=[CHANNEL]
-        )
-        _assert_history(result[CHANNEL], page_size)
-
-
-def _record_rows_read(monkeypatch: pytest.MonkeyPatch) -> list[str]:
-    read: list[str] = []
-    ingest = BasePostgresSaver._ingest_stage1_page
-
-    def record(rows: Sequence[Mapping[str, Any]], *args: Any) -> str | None:
-        read.extend(row["checkpoint_id"] for row in rows)
-        return ingest(rows, *args)
-
-    monkeypatch.setattr(BasePostgresSaver, "_ingest_stage1_page", staticmethod(record))
-    return read
-
-
-def _ids_from_target_down(configs: list[dict]) -> list[str]:
-    return [c["configurable"]["checkpoint_id"] for c in configs[TARGET_STEP::-1]]
-
-
-async def test_async_walk_reads_nothing_newer_than_the_target(
-    monkeypatch: pytest.MonkeyPatch,
-) -> None:
-    read = _record_rows_read(monkeypatch)
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-        configs = await _abuild_chain(saver)
-        result = await saver.aget_delta_channel_history(
-            config=configs[TARGET_STEP], channels=[CHANNEL]
-        )
-    _assert_history(result[CHANNEL], _DELTA_PAGE_SIZE)
-    assert read == _ids_from_target_down(configs)
-
-
-def test_sync_walk_reads_nothing_newer_than_the_target(
-    monkeypatch: pytest.MonkeyPatch,
-) -> None:
-    read = _record_rows_read(monkeypatch)
-    with PostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        saver.setup()
-        configs = _build_chain(saver)
-        result = saver.get_delta_channel_history(
-            config=configs[TARGET_STEP], channels=[CHANNEL]
-        )
-    _assert_history(result[CHANNEL], _DELTA_PAGE_SIZE)
-    assert read == _ids_from_target_down(configs)
-
-
-def _empty_checkpoint_id(config: dict) -> dict:
-    return {"configurable": {**config["configurable"], "checkpoint_id": ""}}
-
-
-async def test_async_empty_checkpoint_id_reads_from_the_latest_checkpoint() -> None:
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-        configs = await _abuild_chain(saver)
-        latest = await saver.aget_delta_channel_history(
-            config=configs[-1], channels=[CHANNEL]
-        )
-
-        result = await saver.aget_delta_channel_history(
-            config=_empty_checkpoint_id(configs[-1]), channels=[CHANNEL]
-        )
-
-    assert latest[CHANNEL]["writes"]
-    assert result == latest
-
-
-def test_sync_empty_checkpoint_id_reads_from_the_latest_checkpoint() -> None:
-    with PostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        saver.setup()
-        configs = _build_chain(saver)
-        latest = saver.get_delta_channel_history(config=configs[-1], channels=[CHANNEL])
-
-        result = saver.get_delta_channel_history(
-            config=_empty_checkpoint_id(configs[-1]), channels=[CHANNEL]
-        )
-
-    assert latest[CHANNEL]["writes"]
-    assert result == latest
-
-
-async def test_root_target_has_no_history_and_still_terminates(
-    monkeypatch: pytest.MonkeyPatch,
-) -> None:
-    monkeypatch.setattr("langgraph.checkpoint.postgres.aio._DELTA_PAGE_SIZE", 1)
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-        configs = await _abuild_chain(saver)
-        result = await saver.aget_delta_channel_history(
-            config=configs[0], channels=[CHANNEL]
-        )
-        assert result[CHANNEL] == {"writes": []}

libs/checkpoint-postgres/tests/test_prune.py

@@ -1,540 +0,0 @@
-import asyncio
-from collections.abc import Awaitable, Callable
-from contextlib import asynccontextmanager
-from typing import Any
-from uuid import uuid4
-
-import pytest
-from langgraph.checkpoint.base import empty_checkpoint
-from langgraph.checkpoint.base.id import uuid6
-from langgraph.checkpoint.conformance import validate
-from langgraph.checkpoint.conformance.initializer import checkpointer_test
-from langgraph.checkpoint.serde.types import TASKS, _DeltaSnapshot
-from psycopg import AsyncConnection
-
-from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
-from langgraph.checkpoint.postgres.base import (
-    PRUNE_DELTA_THREADS_SQL,
-    PRUNE_HEADS_SQL,
-    PRUNE_REFERENCED_BLOBS_SQL,
-)
-from tests.conftest import DEFAULT_POSTGRES_URI, DEFAULT_URI
-from tests.test_async import _saver as _async_saver
-from tests.test_sync import _saver as _sync_saver
-
-SAVERS = ["base", "pool", "pipe", "aio_base", "aio_pool", "aio_pipe"]
-
-
-@asynccontextmanager
-async def _saver(name: str):
-    if name.startswith("aio_"):
-        async with _async_saver(name.removeprefix("aio_")) as saver:
-            yield saver
-    else:
-        with _sync_saver(name) as saver:
-            yield saver
-
-
-async def _call(saver: Any, method: str, *args: Any, **kwargs: Any) -> Any:
-    if isinstance(saver, AsyncPostgresSaver):
-        return await getattr(saver, f"a{method}")(*args, **kwargs)
-    return getattr(saver, method)(*args, **kwargs)
-
-
-async def _rows(saver: Any, thread_id: str) -> dict[str, list[tuple]]:
-    queries = {
-        "checkpoints": "SELECT checkpoint_ns, checkpoint_id FROM checkpoints"
-        " WHERE thread_id = %s ORDER BY 1, 2",
-        "writes": "SELECT checkpoint_ns, checkpoint_id, task_id, idx"
-        " FROM checkpoint_writes WHERE thread_id = %s ORDER BY 1, 2, 3, 4",
-        "blobs": "SELECT checkpoint_ns, channel, version FROM checkpoint_blobs"
-        " WHERE thread_id = %s ORDER BY 1, 2, 3",
-    }
-    rows = {}
-    for table, sql in queries.items():
-        if isinstance(saver, AsyncPostgresSaver):
-            async with saver._cursor() as cur:
-                await cur.execute(sql, (thread_id,))
-                rows[table] = [tuple(r.values()) for r in await cur.fetchall()]
-        else:
-            with saver._cursor() as cur:
-                cur.execute(sql, (thread_id,))
-                rows[table] = [tuple(r.values()) for r in cur.fetchall()]
-    return rows
-
-
-async def _put(
-    saver: Any,
-    thread_id: str,
-    parent: dict | None,
-    step: int,
-    values: dict[str, Any],
-    versions: dict[str, str],
-    *,
-    ns: str = "",
-    metadata: dict[str, Any] | None = None,
-    v: int = 4,
-    checkpoint_id: str | None = None,
-) -> dict:
-    config = {"configurable": {"thread_id": thread_id, "checkpoint_ns": ns}}
-    if parent is not None:
-        config["configurable"]["checkpoint_id"] = parent["configurable"][
-            "checkpoint_id"
-        ]
-    checkpoint = empty_checkpoint()
-    checkpoint.update(
-        v=v,
-        id=checkpoint_id or str(uuid6(clock_seq=step)),
-        channel_values=values,
-        channel_versions=versions,
-    )
-    new_versions = {k: versions[k] for k in values}
-    return await _call(
-        saver,
-        "put",
-        config,
-        checkpoint,
-        {"source": "loop", "step": step, "parents": {}, **(metadata or {})},
-        new_versions,
-    )
-
-
-async def _three_checkpoints(
-    saver: Any,
-    thread_id: str,
-    ns: str = "",
-    metadata: dict[str, Any] | None = None,
-) -> dict:
-    parent = None
-    steps = [
-        ({"a": [1], "s": ["shared"]}, {"a": "1", "s": "1"}),
-        ({"a": [1, 2]}, {"a": "2", "s": "1"}),
-        ({"a": [1, 2, 3]}, {"a": "3", "s": "1"}),
-    ]
-    for step, (values, versions) in enumerate(steps):
-        parent = await _put(
-            saver, thread_id, parent, step, values, versions, ns=ns, metadata=metadata
-        )
-        await _call(saver, "put_writes", parent, [("a", step)], str(uuid4()))
-    return parent
-
-
-@asynccontextmanager
-async def _second_saver(saver: AsyncPostgresSaver):
-    assert isinstance(saver.conn, AsyncConnection)
-    uri = DEFAULT_POSTGRES_URI + saver.conn.info.dbname
-    async with AsyncPostgresSaver.from_conn_string(uri) as other:
-        yield other
-
-
-def _run_once_after(
-    saver: AsyncPostgresSaver,
-    sql: str,
-    action: Callable[[], Awaitable[Any]],
-    *,
-    nth: int = 1,
-) -> None:
-    seen = 0
-    cursor = saver._cursor
-
-    class Hooked:
-        def __init__(self, cur: Any) -> None:
-            self.cur = cur
-
-        def __getattr__(self, name: str) -> Any:
-            return getattr(self.cur, name)
-
-        async def execute(self, query: Any, params: Any = None, **kwargs: Any) -> None:
-            nonlocal seen
-            await self.cur.execute(query, params, **kwargs)
-            if query is sql:
-                seen += 1
-                if seen == nth:
-                    await action()
-
-    @asynccontextmanager
-    async def hooked(**kwargs: Any):
-        async with cursor(**kwargs) as cur:
-            yield Hooked(cur)
-
-    saver._cursor = hooked
-
-
-async def _delta_thread(saver: Any, thread_id: str, evidence: str) -> None:
-    if evidence == "counters":
-        first = await _put(saver, thread_id, None, 0, {"m": [1]}, {"m": "1"})
-        await _put(
-            saver,
-            thread_id,
-            first,
-            1,
-            {},
-            {"m": "2"},
-            metadata={"counters_since_delta_snapshot": {"m": [1, 1]}},
-        )
-    elif evidence == "snapshot":
-        first = await _put(
-            saver, thread_id, None, 0, {"m": _DeltaSnapshot([1])}, {"m": "1"}
-        )
-        await _put(saver, thread_id, first, 1, {}, {"m": "2"})
-    else:
-        marker = {"delta_writes_versioned": True}
-        first = await _put(
-            saver, thread_id, None, 0, {"m": [1]}, {"m": "1"}, metadata=marker
-        )
-        await _put(
-            saver, thread_id, first, 1, {"m": [1, 2]}, {"m": "2"}, metadata=marker
-        )
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_keeps_each_namespace_head_with_its_writes_and_blobs(
-    name: str,
-) -> None:
-    async with _saver(name) as saver:
-        thread_id, other_id = str(uuid4()), str(uuid4())
-        heads = {
-            ns: await _three_checkpoints(saver, thread_id, ns) for ns in ("", "sub:1")
-        }
-        await _three_checkpoints(saver, other_id)
-        before = {ns: await _call(saver, "get_tuple", h) for ns, h in heads.items()}
-        other_before = await _rows(saver, other_id)
-
-        await _call(saver, "prune", [thread_id])
-
-        rows = await _rows(saver, thread_id)
-        assert rows["checkpoints"] == [
-            (ns, heads[ns]["configurable"]["checkpoint_id"]) for ns in ("", "sub:1")
-        ]
-        assert [(ns, cid) for ns, cid, *_ in rows["writes"]] == rows["checkpoints"]
-        assert rows["blobs"] == [
-            (ns, ch, ver)
-            for ns in ("", "sub:1")
-            for ch, ver in (("a", "3"), ("s", "1"))
-        ]
-        for ns, head in heads.items():
-            assert await _call(saver, "get_tuple", head) == before[ns]._replace(
-                parent_config=None
-            )
-        assert await _rows(saver, other_id) == other_before
-
-
-@pytest.mark.parametrize("evidence", ["counters", "snapshot", "versioned"])
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_refuses_a_batch_with_a_delta_channel_thread(
-    name: str, evidence: str
-) -> None:
-    async with _saver(name) as saver:
-        ordinary_id, delta_id = str(uuid4()), str(uuid4())
-        await _three_checkpoints(saver, ordinary_id)
-        await _delta_thread(saver, delta_id, evidence)
-        before = [await _rows(saver, t) for t in (ordinary_id, delta_id)]
-
-        with pytest.raises(NotImplementedError, match=delta_id):
-            await _call(saver, "prune", [ordinary_id, delta_id])
-
-        assert [await _rows(saver, t) for t in (ordinary_id, delta_id)] == before
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_prunes_a_thread_storing_a_plain_true(name: str) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        first = await _put(
-            saver, thread_id, None, 0, {"flag": True, "a": [1]}, {"flag": "1", "a": "1"}
-        )
-        head = await _put(
-            saver, thread_id, first, 1, {"flag": True}, {"flag": "2", "a": "1"}
-        )
-
-        await _call(saver, "prune", [thread_id])
-
-        assert (await _rows(saver, thread_id))["checkpoints"] == [
-            ("", head["configurable"]["checkpoint_id"])
-        ]
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_keeps_the_parent_holding_a_pre_v4_heads_sends(
-    name: str,
-) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        first = await _put(saver, thread_id, None, 0, {}, {}, v=1)
-        await _call(saver, "put_writes", first, [(TASKS, "send-1")], str(uuid4()))
-        second = await _put(saver, thread_id, first, 1, {}, {}, v=1)
-        head = await _put(saver, thread_id, second, 2, {}, {}, v=1)
-        await _call(saver, "put_writes", second, [(TASKS, "send-2")], str(uuid4()))
-
-        await _call(saver, "prune", [thread_id])
-
-        assert (await _rows(saver, thread_id))["checkpoints"] == [
-            ("", second["configurable"]["checkpoint_id"]),
-            ("", head["configurable"]["checkpoint_id"]),
-        ]
-        loaded = await _call(saver, "get_tuple", head)
-        assert loaded.checkpoint["channel_values"][TASKS] == ["send-2"]
-        assert loaded.parent_config == second
-        assert (await _call(saver, "get_tuple", second)).parent_config is None
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_delete_removes_every_row_of_the_threads(name: str) -> None:
-    async with _saver(name) as saver:
-        ordinary_id, delta_id, other_id = str(uuid4()), str(uuid4()), str(uuid4())
-        await _three_checkpoints(saver, ordinary_id)
-        await _delta_thread(saver, delta_id, "counters")
-        await _three_checkpoints(saver, other_id)
-        other_before = await _rows(saver, other_id)
-
-        await _call(saver, "prune", [ordinary_id, delta_id], strategy="delete")
-
-        empty = {"checkpoints": [], "writes": [], "blobs": []}
-        assert await _rows(saver, ordinary_id) == empty
-        assert await _rows(saver, delta_id) == empty
-        assert await _rows(saver, other_id) == other_before
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_unknown_strategy_changes_nothing(name: str) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        await _three_checkpoints(saver, thread_id)
-        before = await _rows(saver, thread_id)
-
-        with pytest.raises(ValueError, match="keep_all"):
-            await _call(saver, "prune", [thread_id], strategy="keep_all")
-
-        assert await _rows(saver, thread_id) == before
-
-
-async def test_async_saver_prune_runs_from_another_thread_only() -> None:
-    async with _saver("aio_base") as saver:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-
-        with pytest.raises(asyncio.InvalidStateError):
-            saver.prune([thread_id])
-        await asyncio.to_thread(saver.prune, [thread_id])
-
-        assert (await _rows(saver, thread_id))["checkpoints"] == [
-            ("", head["configurable"]["checkpoint_id"])
-        ]
-
-
-async def test_prune_conformance() -> None:
-    @checkpointer_test(name="AsyncPostgresSaver")
-    async def postgres_saver():
-        async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-            await saver.setup()
-            yield saver
-
-    report = await validate(postgres_saver, capabilities={"prune"})
-
-    prune = report.results["prune"]
-    if not prune.passed:
-        details = "\n".join(prune.failures)
-        pytest.fail(f"Capability prune failed (passed={prune.passed}):\n{details}")
-
-
-@pytest.mark.parametrize("strategy", ["keep_latest", "delete"])
-@pytest.mark.parametrize("name", ["base", "aio_base"])
-async def test_prune_rejects_a_single_thread_id_string(
-    name: str, strategy: str
-) -> None:
-    async with _saver(name) as saver:
-        for thread_id in ("ab", "a", "b"):
-            await _three_checkpoints(saver, thread_id)
-        before = [await _rows(saver, t) for t in ("ab", "a", "b")]
-
-        with pytest.raises(TypeError, match="not a str"):
-            await _call(saver, "prune", "ab", strategy=strategy)
-
-        assert [await _rows(saver, t) for t in ("ab", "a", "b")] == before
-
-
-@pytest.mark.parametrize(
-    "after", [PRUNE_HEADS_SQL, PRUNE_REFERENCED_BLOBS_SQL], ids=["heads", "blobs"]
-)
-async def test_keep_latest_keeps_a_checkpoint_saved_while_it_runs(after: str) -> None:
-    async with _saver("aio_base") as saver, _second_saver(saver) as other:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-        saved: list[dict] = []
-
-        async def save_a_child() -> None:
-            saved.append(
-                await _put(
-                    other, thread_id, head, 3, {"a": [1, 2, 3, 4]}, {"a": "4", "s": "1"}
-                )
-            )
-
-        _run_once_after(saver, after, save_a_child)
-        await saver.aprune([thread_id])
-
-        loaded = await saver.aget_tuple(saved[0])
-        assert loaded is not None, "the checkpoint saved during the prune was deleted"
-        assert loaded.checkpoint["channel_values"] == {
-            "a": [1, 2, 3, 4],
-            "s": ["shared"],
-        }
-        assert loaded.parent_config == head
-
-
-async def test_keep_latest_refuses_a_thread_that_turns_delta_after_the_batch_check() -> (
-    None
-):
-    async with _saver("aio_base") as saver, _second_saver(saver) as other:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-
-        async def save_a_delta_checkpoint() -> None:
-            await _put(
-                other,
-                thread_id,
-                head,
-                3,
-                {},
-                {"a": "4", "s": "1"},
-                metadata={"counters_since_delta_snapshot": {"a": [1, 1]}},
-            )
-
-        _run_once_after(saver, PRUNE_DELTA_THREADS_SQL, save_a_delta_checkpoint)
-        with pytest.raises(NotImplementedError, match=thread_id):
-            await saver.aprune([thread_id])
-
-        assert len((await _rows(saver, thread_id))["checkpoints"]) == 4
-
-
-async def test_keep_latest_keeps_the_history_of_a_delta_checkpoint_saved_after_the_thread_check() -> (
-    None
-):
-    async with _saver("aio_base") as saver, _second_saver(saver) as other:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-        saved: list[dict] = []
-
-        async def save_a_delta_checkpoint() -> None:
-            saved.append(
-                await _put(
-                    other,
-                    thread_id,
-                    head,
-                    3,
-                    {},
-                    {"a": "4", "s": "1"},
-                    metadata={"counters_since_delta_snapshot": {"a": [1, 1]}},
-                )
-            )
-
-        _run_once_after(saver, PRUNE_DELTA_THREADS_SQL, save_a_delta_checkpoint, nth=2)
-        await saver.aprune([thread_id])
-
-        assert (await _rows(saver, thread_id))["checkpoints"] == [
-            ("", head["configurable"]["checkpoint_id"]),
-            ("", saved[0]["configurable"]["checkpoint_id"]),
-        ]
-        history = await saver.aget_delta_channel_history(
-            config=saved[0], channels=["a"]
-        )
-        assert history["a"]["seed"] == [1, 2, 3]
-        assert [value for _, _, value in history["a"]["writes"]] == [2]
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_deletes_a_subgraph_call_with_the_checkpoint_it_started_from(
-    name: str,
-) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        older = await _put(saver, thread_id, None, 0, {}, {})
-        head = await _put(saver, thread_id, older, 1, {}, {})
-        unsaved = str(uuid6(clock_seq=2))
-        started_from = {
-            "finished:1": older["configurable"]["checkpoint_id"],
-            "interrupted:2": head["configurable"]["checkpoint_id"],
-            "running:3": unsaved,
-            "checkpointer_true": older["configurable"]["checkpoint_id"],
-        }
-        for ns, root in started_from.items():
-            await _three_checkpoints(
-                saver, thread_id, ns, metadata={"parents": {"": root}}
-            )
-
-        await _call(saver, "prune", [thread_id])
-
-        rows = await _rows(saver, thread_id)
-        assert {ns for ns, *_ in rows["checkpoints"]} == {
-            "",
-            "interrupted:2",
-            "running:3",
-            "checkpointer_true",
-        }
-        assert {ns for ns, *_ in rows["writes"]} == {
-            "interrupted:2",
-            "running:3",
-            "checkpointer_true",
-        }
-        assert {ns for ns, *_ in rows["blobs"]} == {
-            "interrupted:2",
-            "running:3",
-            "checkpointer_true",
-        }
-
-
-async def test_keep_latest_keeps_a_checkpoint_saved_meanwhile_whatever_its_id() -> None:
-    async with _saver("aio_base") as saver, _second_saver(saver) as other:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-        lower_id = "0" + head["configurable"]["checkpoint_id"][1:]
-        saved: list[dict] = []
-
-        async def save_a_child_with_a_lower_id() -> None:
-            child = await _put(
-                other,
-                thread_id,
-                head,
-                3,
-                {"a": [1, 2, 3, 4]},
-                {"a": "4", "s": "1"},
-                checkpoint_id=lower_id,
-            )
-            await _call(other, "put_writes", child, [("a", 4)], str(uuid4()))
-            saved.append(child)
-
-        _run_once_after(saver, PRUNE_HEADS_SQL, save_a_child_with_a_lower_id)
-        await saver.aprune([thread_id])
-
-        loaded = await saver.aget_tuple(saved[0])
-        assert loaded is not None, "the checkpoint saved during the prune was deleted"
-        assert loaded.checkpoint["channel_values"] == {
-            "a": [1, 2, 3, 4],
-            "s": ["shared"],
-        }
-        assert [value for _, _, value in loaded.pending_writes or []] == [4]
-
-
-@pytest.mark.parametrize("name", SAVERS)
-async def test_keep_latest_keeps_writes_saved_before_their_checkpoint(
-    name: str,
-) -> None:
-    async with _saver(name) as saver:
-        thread_id = str(uuid4())
-        head = await _three_checkpoints(saver, thread_id)
-        next_id = str(uuid6(clock_seq=3))
-        next_config = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": "",
-                "checkpoint_id": next_id,
-            }
-        }
-        await _call(saver, "put_writes", next_config, [("a", 4)], str(uuid4()))
-
-        await _call(saver, "prune", [thread_id])
-        await _put(
-            saver, thread_id, head, 3, {}, {"a": "3", "s": "1"}, checkpoint_id=next_id
-        )
-
-        loaded = await _call(saver, "get_tuple", next_config)
-        assert [value for _, _, value in loaded.pending_writes] == [4]

libs/checkpoint-postgres/tests/test_store.py

@@ -11,7 +11,6 @@ import pytest
 from langchain_core.embeddings import Embeddings
 from langgraph.store.base import (
     GetOp,
-    InvalidNamespaceError,
     Item,
     ListNamespacesOp,
     MatchCondition,
@@ -1165,51 +1164,3 @@ def test_namespace_labels_with_trailing_newline(store) -> None:
     assert set(store.list_namespaces(prefix=["users", "alice"], limit=100)) == {
         ("users", "alice"),
     }
-
-
-@pytest.mark.parametrize("namespace", [("foo.bar",), ("foo", ""), ("foo", 1)])
-@pytest.mark.parametrize(
-    "kind", ["get", "put", "delete", "search", "list_prefix", "list_suffix"]
-)
-def test_batch_rejects_invalid_namespace_labels(
-    store, namespace: tuple, kind: str
-) -> None:
-    """Ops passed straight to `batch` must not reach another namespace.
-
-    Namespaces are stored dot-joined, so `("foo.bar",)` flattens to the same
-    text as `("foo", "bar")`. `BaseStore` methods validate labels themselves,
-    but `batch` takes ops as given.
-    """
-    op = {
-        "get": GetOp(namespace, "key"),
-        "put": PutOp(namespace, "key", {"changed": True}),
-        "delete": PutOp(namespace, "key", None),
-        "search": SearchOp(namespace),
-        "list_prefix": ListNamespacesOp((MatchCondition("prefix", namespace),)),
-        "list_suffix": ListNamespacesOp((MatchCondition("suffix", namespace),)),
-    }[kind]
-    store.put(("foo", "bar"), "key", {"original": True})
-
-    with pytest.raises(InvalidNamespaceError):
-        store.batch([PutOp(("valid",), "key", {}), op])
-
-    item = store.get(("foo", "bar"), "key")
-    assert item is not None and item.value == {"original": True}
-    # The whole batch is rejected before any SQL runs.
-    assert store.get(("valid",), "key") is None
-
-
-def test_batch_allows_empty_search_prefix_and_listing_wildcards(
-    store,
-) -> None:
-    store.put(("foo", "bar"), "key", {"v": 1})
-
-    found, listed = store.batch(
-        [
-            SearchOp(()),
-            ListNamespacesOp((MatchCondition("prefix", ("foo", "*")),)),
-        ]
-    )
-
-    assert [item.namespace for item in found] == [("foo", "bar")]
-    assert listed == [("foo", "bar")]

libs/checkpoint-postgres/uv.lock

@@ -17,16 +17,16 @@ wheels = [
 
 [[package]]
 name = "anyio"
-version = "4.15.1"
+version = "4.14.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
     { name = "idna" },
-    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.15'" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
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-    { name = "typing-extensions", version = "4.16.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.15'" },
+    { name = "typing-extensions" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/55/e3/70399cb7dd41c10ac53367ae42139cf4b1ca5f36bb3dc6c9d33acdb43655/typing_inspection-0.4.2.tar.gz", hash = "sha256:ba561c48a67c5958007083d386c3295464928b01faa735ab8547c5692e87f464", size = 75949, upload-time = "2025-10-01T02:14:41.687Z" }
 wheels = [
@@ -1154,11 +1131,11 @@ wheels = [
 
 [[package]]
 name = "urllib3"
-version = "2.8.0"
+version = "2.7.0"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/e3/05/b17359e1cefb4f909b5e40b1b90a496d987258916dbbf88e842c729f510e/urllib3-2.8.0.tar.gz", hash = "sha256:63bf2ead4c879426ebf22ef2a781eeb4aa3b4ae798a0435506f8687fd5bb9b63", size = 458972, upload-time = "2026-09-15T19:29:36.253Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/53/0c/06f8b233b8fd13b9e5ee11424ef85419ba0d8ba0b3138bf360be2ff56953/urllib3-2.7.0.tar.gz", hash = "sha256:231e0ec3b63ceb14667c67be60f2f2c40a518cb38b03af60abc813da26505f4c", size = 433602, upload-time = "2026-05-07T16:13:18.596Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/92/9d/c4e665119135114480843e7ab388fa94d8480650450e6f8e26b70d323a4c/urllib3-2.8.0-py3-none-any.whl", hash = "sha256:0cf3cae568d36aa9576b28dfb35f11328f1cb974ca7647d9475ebb86c75ac6e3", size = 135717, upload-time = "2026-09-15T19:29:34.577Z" },
+    { url = "https://files.pythonhosted.org/packages/7f/3e/5db95bcf282c52709639744ca2a8b149baccf648e39c8cc87553df9eae0c/urllib3-2.7.0-py3-none-any.whl", hash = "sha256:9fb4c81ebbb1ce9531cce37674bbc6f1360472bc18ca9a553ede278ef7276897", size = 131087, upload-time = "2026-05-07T16:13:17.151Z" },
 ]
 
 [[package]]

libs/checkpoint-sqlite/README.md

@@ -40,12 +40,24 @@ with SqliteSaver.from_conn_string(":memory:") as checkpointer:
         "v": 4,
         "ts": "2024-07-31T20:14:19.804150+00:00",
         "id": "1ef4f797-8335-6428-8001-8a1503f9b875",
-        "channel_values": {"my_key": "meow", "node": "node"},
-        "channel_versions": {"__start__": 2, "my_key": 3, "start:node": 3, "node": 3},
+        "channel_values": {
+            "my_key": "meow",
+            "node": "node"
+        },
+        "channel_versions": {
+            "__start__": 2,
+            "my_key": 3,
+            "start:node": 3,
+            "node": 3
+        },
         "versions_seen": {
             "__input__": {},
-            "__start__": {"__start__": 1},
-            "node": {"start:node": 2},
+            "__start__": {
+                "__start__": 1
+            },
+            "node": {
+                "start:node": 2
+            }
         },
     }
 
@@ -69,12 +81,24 @@ async with AsyncSqliteSaver.from_conn_string(":memory:") as checkpointer:
         "v": 4,
         "ts": "2024-07-31T20:14:19.804150+00:00",
         "id": "1ef4f797-8335-6428-8001-8a1503f9b875",
-        "channel_values": {"my_key": "meow", "node": "node"},
-        "channel_versions": {"__start__": 2, "my_key": 3, "start:node": 3, "node": 3},
+        "channel_values": {
+            "my_key": "meow",
+            "node": "node"
+        },
+        "channel_versions": {
+            "__start__": 2,
+            "my_key": 3,
+            "start:node": 3,
+            "node": 3
+        },
         "versions_seen": {
             "__input__": {},
-            "__start__": {"__start__": 1},
-            "node": {"start:node": 2},
+            "__start__": {
+                "__start__": 1
+            },
+            "node": {
+                "start:node": 2
+            }
         },
     }
 

libs/checkpoint-sqlite/langgraph/checkpoint/sqlite/__init__.py

@@ -29,11 +29,7 @@ from langgraph.checkpoint.sqlite._delta import (
     build_delta_stage2_sql,
     step_walk_with_row,
 )
-from langgraph.checkpoint.sqlite.utils import (
-    load_pending_writes,
-    pending_writes_sql,
-    search_where,
-)
+from langgraph.checkpoint.sqlite.utils import search_where
 
 _AIO_ERROR_MSG = (
     "The SqliteSaver does not support async methods. "
@@ -85,7 +81,6 @@ class SqliteSaver(BaseCheckpointSaver[str]):
 
     conn: sqlite3.Connection
     is_setup: bool
-    _has_task_path: bool = True
 
     def __init__(
         self,
@@ -159,7 +154,6 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                 checkpoint_ns TEXT NOT NULL DEFAULT '',
                 checkpoint_id TEXT NOT NULL,
                 task_id TEXT NOT NULL,
-                task_path TEXT NOT NULL DEFAULT '',
                 idx INTEGER NOT NULL,
                 channel TEXT NOT NULL,
                 type TEXT,
@@ -168,19 +162,6 @@ class SqliteSaver(BaseCheckpointSaver[str]):
             );
             """
         )
-        # sqlite has no ADD COLUMN IF NOT EXISTS; this migrates databases
-        # created before `task_path` existed and is a no-op on the rest.
-        try:
-            self.conn.execute(
-                "ALTER TABLE writes ADD COLUMN task_path TEXT NOT NULL DEFAULT ''"
-            )
-        except sqlite3.OperationalError as e:
-            # A read-only database from before the column can still be read;
-            # its rows would all read back as '' anyway.
-            if "readonly database" in str(e):
-                self._has_task_path = False
-            elif "duplicate column name" not in str(e):
-                raise
 
         self.is_setup = True
 
@@ -279,7 +260,7 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                     }
                 # find any pending writes
                 cur.execute(
-                    pending_writes_sql(self._has_task_path),
+                    "SELECT task_id, channel, type, value FROM writes WHERE thread_id = ? AND checkpoint_ns = ? AND checkpoint_id = ? ORDER BY task_id, idx",
                     (
                         str(config["configurable"]["thread_id"]),
                         checkpoint_ns,
@@ -305,7 +286,10 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                         if parent_checkpoint_id
                         else None
                     ),
-                    load_pending_writes(cur, self.serde),
+                    [
+                        (task_id, channel, self.serde.loads_typed((type, value)))
+                        for task_id, channel, type, value in cur
+                    ],
                 )
 
     def list(
@@ -367,7 +351,7 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                 metadata,
             ) in cur:
                 wcur.execute(
-                    pending_writes_sql(self._has_task_path),
+                    "SELECT task_id, channel, type, value FROM writes WHERE thread_id = ? AND checkpoint_ns = ? AND checkpoint_id = ? ORDER BY task_id, idx",
                     (thread_id, checkpoint_ns, checkpoint_id),
                 )
                 yield CheckpointTuple(
@@ -394,7 +378,10 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                         if parent_checkpoint_id
                         else None
                     ),
-                    load_pending_writes(wcur, self.serde),
+                    [
+                        (task_id, channel, self.serde.loads_typed((type, value)))
+                        for task_id, channel, type, value in wcur
+                    ],
                 )
 
     def put(
@@ -473,9 +460,9 @@ class SqliteSaver(BaseCheckpointSaver[str]):
             task_path: Path of the task creating the writes.
         """
         query = (
-            "INSERT OR REPLACE INTO writes (thread_id, checkpoint_ns, checkpoint_id, task_id, task_path, idx, channel, type, value) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)"
+            "INSERT OR REPLACE INTO writes (thread_id, checkpoint_ns, checkpoint_id, task_id, idx, channel, type, value) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
             if all(w[0] in WRITES_IDX_MAP for w in writes)
-            else "INSERT OR IGNORE INTO writes (thread_id, checkpoint_ns, checkpoint_id, task_id, task_path, idx, channel, type, value) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)"
+            else "INSERT OR IGNORE INTO writes (thread_id, checkpoint_ns, checkpoint_id, task_id, idx, channel, type, value) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
         )
         with self.cursor() as cur:
             cur.executemany(
@@ -486,7 +473,6 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                         str(config["configurable"]["checkpoint_ns"]),
                         str(config["configurable"]["checkpoint_id"]),
                         task_id,
-                        task_path,
                         WRITES_IDX_MAP.get(channel, idx),
                         channel,
                         *self.serde.dumps_typed(value),
@@ -521,12 +507,13 @@ class SqliteSaver(BaseCheckpointSaver[str]):
 
         Two-stage query:
 
-        * Stage 1 (streamed): recursive CTE over `checkpoints` following
-          `parent_checkpoint_id` from the target, returning
-          `(checkpoint_id, type, checkpoint)` per ancestor. Sqlite has no
-          JSONB, so we ship the full serialized checkpoint blob and inspect
-          `channel_values` in Python. Stops reading when every channel has
-          found its seed or the chain is exhausted.
+        * Stage 1 (paged): newest-first slice of `checkpoints` returning
+          `(checkpoint_id, parent_checkpoint_id, type, checkpoint)` per
+          ancestor. Sqlite has no JSONB, so we ship the full serialized
+          checkpoint blob and inspect `channel_values` in Python. Pages
+          newest-first by `checkpoint_id` with a `< cursor` predicate;
+          page size is `DELTA_PAGE_SIZE`. Stops paging when every channel
+          has found its seed or the chain is exhausted.
 
         * Stage 2 (per-channel UNION ALL): one branch per channel reading
           `writes` filtered to that channel's specific `chain_cids`. No
@@ -539,7 +526,7 @@ class SqliteSaver(BaseCheckpointSaver[str]):
         thread_id = str(config["configurable"]["thread_id"])
         checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
         checkpoint_id = get_checkpoint_id(config)
-        if not checkpoint_id:
+        if checkpoint_id is None:
             target = self.get_tuple(config)
             if target is None:
                 return {ch: {"writes": []} for ch in channels}
@@ -551,14 +538,12 @@ class SqliteSaver(BaseCheckpointSaver[str]):
         seeded: set[str] = set()
 
         with self.cursor(transaction=False) as cur:
-            cur.execute(
-                DELTA_STAGE1_SQL,
-                (thread_id, checkpoint_ns, checkpoint_id, thread_id, checkpoint_ns),
-            )
+            cur.execute(DELTA_STAGE1_SQL, (thread_id, checkpoint_ns, checkpoint_id))
             for row in cur:
-                cid, type_tag, blob = row
+                cid, parent_cid, type_tag, blob = row
                 if step_walk_with_row(
                     cid=cid,
+                    parent_cid=parent_cid,
                     type_tag=type_tag,
                     blob=blob,
                     target_id=checkpoint_id,
@@ -573,7 +558,6 @@ class SqliteSaver(BaseCheckpointSaver[str]):
 
             channels_with_chain = [ch for ch in channels if chain_by_ch[ch]]
             stage2_sql = build_delta_stage2_sql(
-                has_task_path=self._has_task_path,
                 chain_lens=[len(chain_by_ch[ch]) for ch in channels_with_chain],
             )
             if stage2_sql:
@@ -584,7 +568,7 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                     )
                 cur.execute(stage2_sql, stage2_params)
                 stage2_rows = cast(
-                    "list[tuple[str, str, str, int, str, bytes, str]]", cur.fetchall()
+                    "list[tuple[str, str, str, int, str, bytes]]", cur.fetchall()
                 )
             else:
                 stage2_rows = []

libs/checkpoint-sqlite/langgraph/checkpoint/sqlite/_delta.py

@@ -24,45 +24,22 @@ from __future__ import annotations
 from collections.abc import Mapping, Sequence
 from typing import Any
 
-from langgraph.checkpoint.base import (
-    DeltaChannelHistory,
-    PendingWrite,
-    writes_sort_key,
-)
+from langgraph.checkpoint.base import DeltaChannelHistory, PendingWrite
 
-# Stage 1 streams target, then its ancestors nearest-first, by following
-# `parent_checkpoint_id` rather than id order: ids are only monotonic within
-# one process, so a range scan by id can miss a parent whose id sorts above
-# its child's. Target is the anchor row; its own writes/seed are skipped
-# (matches the `BaseCheckpointSaver` contract).
-#
-# `put` is `INSERT OR REPLACE`, so re-putting an existing id under a
-# descendant's config makes the chain a loop. `step_walk_with_row` stops on a
-# repeated id; sqlite yields recursive rows lazily, so abandoning the cursor
-# ends the recursion.
-#
-# `CROSS JOIN` pins `ancestors` as the outer loop, so each step is one primary
-# key lookup. With a plain `JOIN` and no `ANALYZE` stats, sqlite can put
-# `checkpoints` outside and scan the whole thread per step.
+# Stage 1 streams ancestors of `target_cid` newest-first. The `<=`
+# predicate keeps target itself in the stream so we can read its
+# `parent_checkpoint_id` from the first row without a separate lookup;
+# the caller skips target's own writes/seed (matches the
+# `BaseCheckpointSaver` contract).
 DELTA_STAGE1_SQL = (
-    "WITH RECURSIVE ancestors(checkpoint_id, parent_checkpoint_id, type, "
-    "checkpoint) AS ("
     "SELECT checkpoint_id, parent_checkpoint_id, type, checkpoint "
     "FROM checkpoints "
-    "WHERE thread_id = ? AND checkpoint_ns = ? AND checkpoint_id = ? "
-    "UNION ALL "
-    "SELECT c.checkpoint_id, c.parent_checkpoint_id, c.type, c.checkpoint "
-    "FROM ancestors a CROSS JOIN checkpoints c "
-    "ON c.checkpoint_id = a.parent_checkpoint_id "
-    "WHERE c.thread_id = ? AND c.checkpoint_ns = ?"
-    ") "
-    "SELECT checkpoint_id, type, checkpoint FROM ancestors"
+    "WHERE thread_id = ? AND checkpoint_ns = ? AND checkpoint_id <= ? "
+    "ORDER BY checkpoint_id DESC"
 )
 
 
-def build_delta_stage2_sql(
-    *, chain_lens: Sequence[int], has_task_path: bool = True
-) -> str:
+def build_delta_stage2_sql(*, chain_lens: Sequence[int]) -> str:
     """Stage-2 per-channel UNION ALL fetching writes from `writes`.
 
     One branch per channel with a non-empty chain. Each branch inlines its
@@ -76,12 +53,11 @@ def build_delta_stage2_sql(
     of a single `channel = ANY(channels)` filter when channels have
     different chain depths — same rationale as postgres.
     """
-    task_path = "task_path" if has_task_path else "''"
     branches: list[str] = []
     for n in chain_lens:
         cid_placeholders = ",".join("?" * n)
         branches.append(
-            f"SELECT checkpoint_id, channel, task_id, idx, type, value, {task_path} "
+            "SELECT checkpoint_id, channel, task_id, idx, type, value "
             "FROM writes "
             "WHERE thread_id = ? AND checkpoint_ns = ? AND channel = ? "
             f"AND checkpoint_id IN ({cid_placeholders})"
@@ -92,6 +68,7 @@ def build_delta_stage2_sql(
 def step_walk_with_row(
     *,
     cid: str,
+    parent_cid: str | None,
     type_tag: str,
     blob: bytes,
     target_id: str,
@@ -104,32 +81,36 @@ def step_walk_with_row(
 ) -> bool:
     """Process one streamed stage-1 row in the merged ancestor walk.
 
-    The cursor returns (cid, type, blob) rows in walk order starting at
-    target. The first row is target itself and is skipped (target's own
-    writes/seed are not part of the contract).
+    The cursor returns (cid, parent_cid, type, blob) rows in
+    `checkpoint_id` DESC order starting at target. The first row is
+    target itself; we read its parent_cid to seed the walk and otherwise
+    skip it (target's own writes/seed are not part of the contract).
 
-    For each subsequent row we deserialize the blob, append the cid to
-    every not-yet-seeded channel's chain, and check `channel_values` for
+    For each subsequent row, if `cid` matches the walk's current
+    position, we deserialize the blob, append the cid to every
+    not-yet-seeded channel's chain, and check `channel_values` for
     seeds. The deserialized checkpoint is dropped before advancing — no
     cross-row cache, so peak in-flight is one deserialized checkpoint.
 
-    Returns True when the caller can stop iterating and close the cursor:
-    every requested channel is seeded, or the chain revisited a checkpoint.
+    Off-path rows (different branch on the same thread) advance the
+    cursor without doing any work.
+
+    Returns True when every requested channel is seeded — the caller
+    can stop iterating and close the cursor.
     """
     if "started" not in walk_state:
         if cid == target_id:
             walk_state["started"] = True
+            walk_state["cur_cid"] = parent_cid
             walk_state["active"] = {ch for ch in channels if ch not in seeded}
-            walk_state["walked"] = {cid}
         # Not target yet (or target not present): keep streaming.
         return False
     active: set[str] = walk_state["active"]
     if not active:
         return True
-    walked: set[str] = walk_state["walked"]
-    if cid in walked:
-        return True
-    walked.add(cid)
+    if cid != walk_state["cur_cid"]:
+        # Off-path row from a sibling branch — skip without deserializing.
+        return False
     for ch in active:
         chain_by_ch[ch].append(cid)
     ckpt = serde.loads_typed((type_tag, blob))
@@ -139,6 +120,7 @@ def step_walk_with_row(
         seeded.add(ch)
         active.discard(ch)
     del ckpt, channel_values
+    walk_state["cur_cid"] = parent_cid
     return not active
 
 
@@ -148,31 +130,29 @@ def build_delta_channels_writes_history(
     chain_by_ch: Mapping[str, list[str]],
     seed_val_by_ch: Mapping[str, Any],
     seeded: set[str],
-    stage2_rows: Sequence[tuple[str, str, str, int, str, bytes, str]],
+    stage2_rows: Sequence[tuple[str, str, str, int, str, bytes]],
     serde: Any,
 ) -> dict[str, DeltaChannelHistory]:
     """Demux stage-2 rows per channel; produce per-channel histories.
 
-    Stage-2 rows are
-    `(checkpoint_id, channel, task_id, idx, type, value, task_path)`.
-    Final write order is oldest→newest globally and `writes_sort_key`
-    within a checkpoint, matching the contract on
-    `DeltaChannelHistory.writes`.
+    Stage-2 rows are `(checkpoint_id, channel, task_id, idx, type, value)`.
+    Final write order is oldest→newest globally and `(task_id, idx)` within
+    a checkpoint, matching the contract on `DeltaChannelHistory.writes`.
 
     `seed` is omitted when the walk reached a true root with no snapshot
     found (channel never entered `seeded`); consumers treat absence as
     "start empty".
     """
-    writes_by_ch_by_cid: dict[
-        str, dict[str, list[tuple[str, bytes, str, int, str]]]
-    ] = {ch: {} for ch in channels}
-    for cid, ch, task_id, idx, type_tag, value_blob, task_path in stage2_rows:
+    writes_by_ch_by_cid: dict[str, dict[str, list[tuple[str, bytes, str, int]]]] = {
+        ch: {} for ch in channels
+    }
+    for cid, ch, task_id, idx, type_tag, value_blob in stage2_rows:
         writes_by_ch_by_cid.setdefault(ch, {}).setdefault(cid, []).append(
-            (type_tag, value_blob, task_id, idx, task_path)
+            (type_tag, value_blob, task_id, idx)
         )
     for cid_map in writes_by_ch_by_cid.values():
         for ws in cid_map.values():
-            ws.sort(key=lambda w: writes_sort_key(w[4], w[2], w[3]))
+            ws.sort(key=lambda w: (w[2], w[3]))
 
     result: dict[str, DeltaChannelHistory] = {}
     for ch in channels:
@@ -181,7 +161,7 @@ def build_delta_channels_writes_history(
         collected: list[PendingWrite] = []
         # Chain is newest-first; iterate oldest-first for the public order.
         for cid in reversed(chain_cids):
-            for type_tag, value_blob, task_id, _idx, _path in cid_writes.get(cid, []):
+            for type_tag, value_blob, task_id, _idx in cid_writes.get(cid, []):
                 collected.append(
                     (task_id, ch, serde.loads_typed((type_tag, value_blob)))
                 )

libs/checkpoint-sqlite/langgraph/checkpoint/sqlite/aio.py

@@ -30,11 +30,7 @@ from langgraph.checkpoint.sqlite._delta import (
     build_delta_stage2_sql,
     step_walk_with_row,
 )
-from langgraph.checkpoint.sqlite.utils import (
-    load_pending_writes,
-    pending_writes_sql,
-    search_where,
-)
+from langgraph.checkpoint.sqlite.utils import search_where
 
 T = TypeVar("T", bound=Callable)
 
@@ -118,7 +114,6 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
 
     lock: asyncio.Lock
     is_setup: bool
-    _has_task_path: bool = True
 
     def __init__(
         self,
@@ -336,7 +331,6 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
                     checkpoint_ns TEXT NOT NULL DEFAULT '',
                     checkpoint_id TEXT NOT NULL,
                     task_id TEXT NOT NULL,
-                    task_path TEXT NOT NULL DEFAULT '',
                     idx INTEGER NOT NULL,
                     channel TEXT NOT NULL,
                     type TEXT,
@@ -347,21 +341,6 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
             ):
                 await self.conn.commit()
 
-            # sqlite has no ADD COLUMN IF NOT EXISTS; this migrates databases
-            # created before `task_path` existed and is a no-op on the rest.
-            try:
-                await self.conn.execute(
-                    "ALTER TABLE writes ADD COLUMN task_path TEXT NOT NULL DEFAULT ''"
-                )
-                await self.conn.commit()
-            except aiosqlite.OperationalError as e:
-                # A read-only database from before the column can still be read;
-                # its rows would all read back as '' anyway.
-                if "readonly database" in str(e):
-                    self._has_task_path = False
-                elif "duplicate column name" not in str(e):
-                    raise
-
             self.is_setup = True
 
     async def aget_tuple(self, config: RunnableConfig) -> CheckpointTuple | None:
@@ -416,7 +395,7 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
                     }
                 # find any pending writes
                 await cur.execute(
-                    pending_writes_sql(self._has_task_path),
+                    "SELECT task_id, channel, type, value FROM writes WHERE thread_id = ? AND checkpoint_ns = ? AND checkpoint_id = ? ORDER BY task_id, idx",
                     (
                         str(config["configurable"]["thread_id"]),
                         checkpoint_ns,
@@ -442,7 +421,10 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
                         if parent_checkpoint_id
                         else None
                     ),
-                    load_pending_writes(await cur.fetchall(), self.serde),
+                    [
+                        (task_id, channel, self.serde.loads_typed((type, value)))
+                        async for task_id, channel, type, value in cur
+                    ],
                 )
 
     async def alist(
@@ -491,7 +473,7 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
                 metadata,
             ) in cur:
                 await wcur.execute(
-                    pending_writes_sql(self._has_task_path),
+                    "SELECT task_id, channel, type, value FROM writes WHERE thread_id = ? AND checkpoint_ns = ? AND checkpoint_id = ? ORDER BY task_id, idx",
                     (thread_id, checkpoint_ns, checkpoint_id),
                 )
                 yield CheckpointTuple(
@@ -518,7 +500,10 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
                         if parent_checkpoint_id
                         else None
                     ),
-                    load_pending_writes(await wcur.fetchall(), self.serde),
+                    [
+                        (task_id, channel, self.serde.loads_typed((type, value)))
+                        async for task_id, channel, type, value in wcur
+                    ],
                 )
 
     async def aput(
@@ -591,9 +576,9 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
             task_path: Path of the task creating the writes.
         """
         query = (
-            "INSERT OR REPLACE INTO writes (thread_id, checkpoint_ns, checkpoint_id, task_id, task_path, idx, channel, type, value) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)"
+            "INSERT OR REPLACE INTO writes (thread_id, checkpoint_ns, checkpoint_id, task_id, idx, channel, type, value) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
             if all(w[0] in WRITES_IDX_MAP for w in writes)
-            else "INSERT OR IGNORE INTO writes (thread_id, checkpoint_ns, checkpoint_id, task_id, task_path, idx, channel, type, value) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)"
+            else "INSERT OR IGNORE INTO writes (thread_id, checkpoint_ns, checkpoint_id, task_id, idx, channel, type, value) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
         )
         await self.setup()
         async with self.lock, self.conn.cursor() as cur:
@@ -605,7 +590,6 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
                         str(config["configurable"]["checkpoint_ns"]),
                         str(config["configurable"]["checkpoint_id"]),
                         task_id,
-                        task_path,
                         WRITES_IDX_MAP.get(channel, idx),
                         channel,
                         *self.serde.dumps_typed(value),
@@ -641,8 +625,8 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
         """Fast-path override of `BaseCheckpointSaver.aget_delta_channel_history`.
 
         See `SqliteSaver.get_delta_channel_history` for design notes; this
-        is the async equivalent using `aiosqlite` cursors. Stage 1 streams
-        the parent chain from the target and Python-deserializes each
+        is the async equivalent using `aiosqlite` cursors. Stage 1 pages
+        the parent chain newest-first and Python-deserializes each
         checkpoint blob to find per-channel snapshots; stage 2 fetches
         only the relevant writes via per-channel UNION ALL.
         """
@@ -653,7 +637,7 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
         thread_id = str(config["configurable"]["thread_id"])
         checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
         checkpoint_id = get_checkpoint_id(config)
-        if not checkpoint_id:
+        if checkpoint_id is None:
             target = await self.aget_tuple(config)
             if target is None:
                 return {ch: {"writes": []} for ch in channels}
@@ -666,13 +650,13 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
 
         async with self.lock, self.conn.cursor() as cur:
             await cur.execute(
-                DELTA_STAGE1_SQL,
-                (thread_id, checkpoint_ns, checkpoint_id, thread_id, checkpoint_ns),
+                DELTA_STAGE1_SQL, (thread_id, checkpoint_ns, checkpoint_id)
             )
             async for row in cur:
-                cid, type_tag, blob = row
+                cid, parent_cid, type_tag, blob = row
                 if step_walk_with_row(
                     cid=cid,
+                    parent_cid=parent_cid,
                     type_tag=type_tag,
                     blob=blob,
                     target_id=checkpoint_id,
@@ -687,7 +671,6 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
 
             channels_with_chain = [ch for ch in channels if chain_by_ch[ch]]
             stage2_sql = build_delta_stage2_sql(
-                has_task_path=self._has_task_path,
                 chain_lens=[len(chain_by_ch[ch]) for ch in channels_with_chain],
             )
             if stage2_sql:
@@ -698,7 +681,7 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
                     )
                 await cur.execute(stage2_sql, stage2_params)
                 stage2_rows = cast(
-                    "list[tuple[str, str, str, int, str, bytes, str]]",
+                    "list[tuple[str, str, str, int, str, bytes]]",
                     await cur.fetchall(),
                 )
             else:

libs/checkpoint-sqlite/langgraph/checkpoint/sqlite/utils.py

@@ -2,12 +2,11 @@ from __future__ import annotations
 
 import json
 import re
-from collections.abc import Iterable, Sequence
+from collections.abc import Sequence
 from typing import Any
 
 from langchain_core.runnables import RunnableConfig
-from langgraph.checkpoint.base import PendingWrite, get_checkpoint_id, writes_sort_key
-from langgraph.checkpoint.serde.base import SerializerProtocol
+from langgraph.checkpoint.base import get_checkpoint_id
 
 _FILTER_PATTERN = re.compile(r"^[a-zA-Z0-9_.-]+$")
 
@@ -115,23 +114,3 @@ def search_where(
         param_values.append(get_checkpoint_id(before))
 
     return ("WHERE " + " AND ".join(wheres) if wheres else "", param_values)
-
-
-def pending_writes_sql(has_task_path: bool) -> str:
-    task_path = "task_path" if has_task_path else "''"
-    return (
-        f"SELECT task_id, channel, type, value, {task_path}, idx FROM writes "
-        "WHERE thread_id = ? AND checkpoint_ns = ? AND checkpoint_id = ?"
-    )
-
-
-def load_pending_writes(
-    rows: Iterable[Any], serde: SerializerProtocol
-) -> list[PendingWrite]:
-    """Deserialize `pending_writes_sql` rows in `writes_sort_key` order."""
-    return [
-        (task_id, channel, serde.loads_typed((type_, value)))
-        for task_id, channel, type_, value, _, _ in sorted(
-            rows, key=lambda r: writes_sort_key(r[4], r[0], r[5])
-        )
-    ]

libs/checkpoint-sqlite/langgraph/store/sqlite/aio.py

@@ -547,7 +547,7 @@ class AsyncSqliteStore(AsyncBatchedBaseStore, BaseSqliteStore):
             await cur.execute(query, params)
             rows = await cur.fetchall()
 
-            if needs_refresh and self.ttl_config:
+            if needs_refresh and rows and self.ttl_config:
                 keys_to_refresh = []
                 for row_data in rows:
                     # Assuming row_data[0] is prefix (text), row_data[1] is key (text)

libs/checkpoint-sqlite/langgraph/store/sqlite/base.py

@@ -7,7 +7,7 @@ import re
 import sqlite3
 import threading
 from collections import defaultdict
-from collections.abc import Callable, Iterable, Iterator, Mapping, Sequence
+from collections.abc import Callable, Iterable, Iterator, Sequence
 from contextlib import contextmanager
 from typing import Any, Literal, NamedTuple, cast
 
@@ -28,7 +28,6 @@ from langgraph.store.base import (
     ensure_embeddings,
     get_text_at_path,
     tokenize_path,
-    validate_op_namespace,
 )
 
 _AIO_ERROR_MSG = (
@@ -258,7 +257,6 @@ def _group_ops(ops: Iterable[Op]) -> tuple[dict[type, list[tuple[int, Op]]], int
     grouped_ops: dict[type, list[tuple[int, Op]]] = defaultdict(list)
     tot = 0
     for idx, op in enumerate(ops):
-        validate_op_namespace(op)
         grouped_ops[type(op)].append((idx, op))
         tot += 1
     return grouped_ops, tot
@@ -389,7 +387,7 @@ class BaseSqliteStore:
                     [
                         _namespace_to_text(op.namespace),
                         op.key,
-                        orjson.dumps(dict(cast(Mapping[str, Any], op.value))),
+                        orjson.dumps(cast(dict, op.value)),
                         expires_at,
                         op.ttl,
                     ]

libs/checkpoint-sqlite/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint-sqlite"
-version = "3.1.2"
+version = "3.1.1"
 description = "Library with a SQLite implementation of LangGraph checkpoint saver."
 authors = []
 requires-python = ">=3.10"
@@ -12,7 +12,7 @@ readme = "README.md"
 license = "MIT"
 license-files = ['LICENSE']
 dependencies = [
-    "langgraph-checkpoint>=4.3.0,<5.0.0",
+    "langgraph-checkpoint>=4.1.0,<5.0.0",
     "aiosqlite>=0.20",
     "sqlite-vec>=0.1.6",
 ]

libs/checkpoint-sqlite/tests/test_async_store.py

@@ -9,10 +9,8 @@ from typing import cast
 import pytest
 from langgraph.store.base import (
     GetOp,
-    InvalidNamespaceError,
     Item,
     ListNamespacesOp,
-    MatchCondition,
     PutOp,
     SearchOp,
 )
@@ -747,65 +745,3 @@ async def test_async_namespace_segment_boundary(store: AsyncSqliteStore) -> None
     assert set(await store.alist_namespaces(suffix=["alice"], limit=100)) == {
         ("uid", "users", "alice"),
     }
-
-
-@pytest.mark.parametrize("namespace", [("foo.bar",), ("foo", ""), ("foo", 1)])
-async def test_abatch_rejects_invalid_namespace_labels(
-    store: AsyncSqliteStore, namespace: tuple
-) -> None:
-    await store.aput(("foo", "bar"), "key", {"original": True})
-
-    for op in (
-        GetOp(namespace, "key"),
-        GetOp(namespace, "key", refresh_ttl=True),
-        PutOp(namespace, "key", {"changed": True}),
-        PutOp(namespace, "key", None),
-        SearchOp(namespace),
-        ListNamespacesOp((MatchCondition("prefix", namespace),)),
-        ListNamespacesOp((MatchCondition("suffix", namespace),)),
-    ):
-        with pytest.raises(InvalidNamespaceError):
-            await store.abatch([op])
-
-    item = await store.aget(("foo", "bar"), "key")
-    assert item is not None and item.value == {"original": True}
-
-
-async def test_invalid_namespace_only_fails_its_own_call(
-    store: AsyncSqliteStore,
-) -> None:
-    """Concurrent calls share one `abatch`, which fails every op if it raises.
-
-    Labels are checked before an op is queued, so one caller's bad label cannot
-    fail another caller's request.
-    """
-    await store.aput(("foo", "bar"), "key", {"original": True})
-
-    valid, invalid = await asyncio.gather(
-        store.aget(("foo", "bar"), "key"),
-        store.aget(("foo.bar",), "key"),
-        return_exceptions=True,
-    )
-
-    assert isinstance(valid, Item) and valid.value == {"original": True}
-    assert isinstance(invalid, InvalidNamespaceError)
-
-
-async def test_sync_methods_reject_invalid_namespace_labels(
-    store: AsyncSqliteStore,
-) -> None:
-    """The sync wrappers run off the event loop thread and must validate too."""
-    await store.aput(("foo", "bar"), "key", {"original": True})
-
-    for call in (
-        lambda: store.get(("foo.bar",), "key"),
-        lambda: store.search(("foo.bar",)),
-        lambda: store.delete(("foo.bar",), "key"),
-        lambda: store.list_namespaces(prefix=("foo.bar",)),
-        lambda: store.batch([GetOp(("foo.bar",), "key")]),
-    ):
-        with pytest.raises(InvalidNamespaceError):
-            await asyncio.to_thread(call)
-
-    item = await store.aget(("foo", "bar"), "key")
-    assert item is not None and item.value == {"original": True}

libs/checkpoint-sqlite/tests/test_delta_parent_walk.py

@@ -1,137 +0,0 @@
-from __future__ import annotations
-
-from typing import Any
-
-import pytest
-from langgraph.checkpoint.base import (
-    BaseCheckpointSaver,
-    Checkpoint,
-    DeltaChannelHistory,
-    empty_checkpoint,
-)
-
-from langgraph.checkpoint.sqlite import SqliteSaver
-from langgraph.checkpoint.sqlite._delta import DELTA_STAGE1_SQL
-from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
-
-CHANNEL = "ch"
-CONFIG: dict[str, Any] = {"configurable": {"thread_id": "t", "checkpoint_ns": ""}}
-EXPECTED: DeltaChannelHistory = {
-    "writes": [("task", CHANNEL, "write-root")],
-    "seed": "seed",
-}
-
-
-def _checkpoint(checkpoint_id: str, values: dict[str, Any]) -> Checkpoint:
-    value = empty_checkpoint()
-    value["id"] = checkpoint_id
-    value["channel_values"] = values
-    return value
-
-
-PARENT_ID_ORDERS = [
-    pytest.param("z-older", "a-newer", id="parent_id_sorts_above_child"),
-    pytest.param("a-older", "z-newer", id="parent_id_sorts_below_child"),
-]
-
-
-@pytest.mark.parametrize(("root_id", "child_id"), PARENT_ID_ORDERS)
-def test_sync_walk_reaches_parent_whatever_the_id_order(
-    root_id: str, child_id: str
-) -> None:
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        root = saver.put(CONFIG, _checkpoint(root_id, {CHANNEL: "seed"}), {}, {})
-        saver.put_writes(root, [(CHANNEL, "write-root")], "task")
-        child = saver.put(root, _checkpoint(child_id, {}), {}, {})
-
-        got = saver.get_delta_channel_history(config=child, channels=[CHANNEL])
-        reference = BaseCheckpointSaver.get_delta_channel_history(
-            saver, config=child, channels=[CHANNEL]
-        )
-        assert got[CHANNEL] == EXPECTED
-        assert got[CHANNEL] == reference[CHANNEL], "fast path disagrees with base"
-
-
-@pytest.mark.parametrize(("root_id", "child_id"), PARENT_ID_ORDERS)
-async def test_async_walk_reaches_parent_whatever_the_id_order(
-    root_id: str, child_id: str
-) -> None:
-    async with AsyncSqliteSaver.from_conn_string(":memory:") as saver:
-        root = await saver.aput(CONFIG, _checkpoint(root_id, {CHANNEL: "seed"}), {}, {})
-        await saver.aput_writes(root, [(CHANNEL, "write-root")], "task")
-        child = await saver.aput(root, _checkpoint(child_id, {}), {}, {})
-
-        got = await saver.aget_delta_channel_history(config=child, channels=[CHANNEL])
-        assert got[CHANNEL] == EXPECTED
-
-
-EMPTY_CHECKPOINT_ID: dict[str, Any] = {
-    "configurable": {**CONFIG["configurable"], "checkpoint_id": ""}
-}
-
-
-def test_sync_empty_checkpoint_id_reads_from_the_latest_checkpoint() -> None:
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        root = saver.put(CONFIG, _checkpoint("a-older", {CHANNEL: "seed"}), {}, {})
-        saver.put_writes(root, [(CHANNEL, "write-root")], "task")
-        saver.put(root, _checkpoint("z-newer", {}), {}, {})
-
-        got = saver.get_delta_channel_history(
-            config=EMPTY_CHECKPOINT_ID, channels=[CHANNEL]
-        )
-
-        assert got[CHANNEL] == EXPECTED
-
-
-async def test_async_empty_checkpoint_id_reads_from_the_latest_checkpoint() -> None:
-    async with AsyncSqliteSaver.from_conn_string(":memory:") as saver:
-        root = await saver.aput(
-            CONFIG, _checkpoint("a-older", {CHANNEL: "seed"}), {}, {}
-        )
-        await saver.aput_writes(root, [(CHANNEL, "write-root")], "task")
-        await saver.aput(root, _checkpoint("z-newer", {}), {}, {})
-
-        got = await saver.aget_delta_channel_history(
-            config=EMPTY_CHECKPOINT_ID, channels=[CHANNEL]
-        )
-
-        assert got[CHANNEL] == EXPECTED
-
-
-def test_walk_reaches_root_of_long_chain_with_descending_ids() -> None:
-    steps = 40
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        parent = saver.put(
-            CONFIG, _checkpoint(f"id-{steps:03d}", {CHANNEL: "seed"}), {}, {}
-        )
-        saver.put_writes(parent, [(CHANNEL, "write-root")], "task")
-        for step in range(steps - 1, 0, -1):
-            parent = saver.put(parent, _checkpoint(f"id-{step:03d}", {}), {}, {})
-
-        got = saver.get_delta_channel_history(config=parent, channels=[CHANNEL])
-        assert got[CHANNEL] == EXPECTED
-
-
-def test_walk_terminates_when_put_makes_the_parent_chain_cycle() -> None:
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        a = saver.put(CONFIG, _checkpoint("cid-a", {}), {}, {})
-        b = saver.put(a, _checkpoint("cid-b", {}), {}, {})
-        repoint_a_under_b = _checkpoint("cid-a", {})
-        saver.put(b, repoint_a_under_b, {}, {})
-
-        got = saver.get_delta_channel_history(config=b, channels=[CHANNEL])
-        assert got[CHANNEL] == {"writes": []}
-
-
-def test_walk_step_looks_up_the_parent_by_primary_key() -> None:
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        saver.setup()
-        plan = [
-            row[3]
-            for row in saver.conn.execute(
-                f"EXPLAIN QUERY PLAN {DELTA_STAGE1_SQL}", ("t", "", "id", "t", "")
-            )
-        ]
-    assert any(
-        step.startswith("SEARCH c ") and "checkpoint_id=?" in step for step in plan
-    ), f"recursive step should look up the parent by key, got {plan}"

libs/checkpoint-sqlite/tests/test_store.py

@@ -14,7 +14,6 @@ import pytest
 from langchain_core.embeddings import Embeddings
 from langgraph.store.base import (
     GetOp,
-    InvalidNamespaceError,
     Item,
     ListNamespacesOp,
     MatchCondition,
@@ -1436,51 +1435,3 @@ def test_list_namespaces_metacharacter_labels(store: SqliteStore) -> None:
         assert set(store.list_namespaces(prefix=[label, "child"], limit=100)) == {
             (label, "child"),
         }
-
-
-@pytest.mark.parametrize("namespace", [("foo.bar",), ("foo", ""), ("foo", 1)])
-@pytest.mark.parametrize(
-    "kind", ["get", "put", "delete", "search", "list_prefix", "list_suffix"]
-)
-def test_batch_rejects_invalid_namespace_labels(
-    store: SqliteStore, namespace: tuple, kind: str
-) -> None:
-    """Ops passed straight to `batch` must not reach another namespace.
-
-    Namespaces are stored dot-joined, so `("foo.bar",)` flattens to the same
-    text as `("foo", "bar")`. `BaseStore` methods validate labels themselves,
-    but `batch` takes ops as given.
-    """
-    op = {
-        "get": GetOp(namespace, "key"),
-        "put": PutOp(namespace, "key", {"changed": True}),
-        "delete": PutOp(namespace, "key", None),
-        "search": SearchOp(namespace),
-        "list_prefix": ListNamespacesOp((MatchCondition("prefix", namespace),)),
-        "list_suffix": ListNamespacesOp((MatchCondition("suffix", namespace),)),
-    }[kind]
-    store.put(("foo", "bar"), "key", {"original": True})
-
-    with pytest.raises(InvalidNamespaceError):
-        store.batch([PutOp(("valid",), "key", {}), op])
-
-    item = store.get(("foo", "bar"), "key")
-    assert item is not None and item.value == {"original": True}
-    # The whole batch is rejected before any SQL runs.
-    assert store.get(("valid",), "key") is None
-
-
-def test_batch_allows_empty_search_prefix_and_listing_wildcards(
-    store: SqliteStore,
-) -> None:
-    store.put(("foo", "bar"), "key", {"v": 1})
-
-    found, listed = store.batch(
-        [
-            SearchOp(()),
-            ListNamespacesOp((MatchCondition("prefix", ("foo", "*")),)),
-        ]
-    )
-
-    assert [item.namespace for item in found] == [("foo", "bar")]
-    assert listed == [("foo", "bar")]

libs/checkpoint-sqlite/tests/test_writes_task_path_migration.py

@@ -1,151 +0,0 @@
-import sqlite3
-from collections.abc import Iterator
-from contextlib import closing
-from pathlib import Path
-
-import aiosqlite
-import pytest
-from langgraph.checkpoint.base import empty_checkpoint
-
-from langgraph.checkpoint.sqlite import SqliteSaver
-from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
-
-WRITES_BEFORE_TASK_PATH = """
-CREATE TABLE writes (
-    thread_id TEXT NOT NULL,
-    checkpoint_ns TEXT NOT NULL DEFAULT '',
-    checkpoint_id TEXT NOT NULL,
-    task_id TEXT NOT NULL,
-    idx INTEGER NOT NULL,
-    channel TEXT NOT NULL,
-    type TEXT,
-    value BLOB,
-    PRIMARY KEY (thread_id, checkpoint_ns, checkpoint_id, task_id, idx)
-);
-INSERT INTO writes VALUES ('t', '', 'c', 'old-task', 0, 'ch', 'null', X'');
-"""
-
-
-@pytest.fixture
-def legacy_db(tmp_path: Path) -> Path:
-    db = tmp_path / "legacy.sqlite"
-    with sqlite3.connect(db) as conn:
-        conn.executescript(WRITES_BEFORE_TASK_PATH)
-    return db
-
-
-def test_setup_migrates_legacy_writes_table_repeatably(legacy_db: Path) -> None:
-    for _ in range(2):
-        with SqliteSaver.from_conn_string(str(legacy_db)) as saver:
-            saver.setup()
-            rows = saver.conn.execute(
-                "SELECT task_id, task_path FROM writes"
-            ).fetchall()
-            assert rows == [("old-task", "")]
-
-
-@pytest.mark.parametrize("fresh", [True, False], ids=["fresh", "legacy"])
-def test_put_writes_persists_task_path(
-    tmp_path: Path, legacy_db: Path, fresh: bool
-) -> None:
-    db = tmp_path / "fresh.sqlite" if fresh else legacy_db
-    with SqliteSaver.from_conn_string(str(db)) as saver:
-        config = saver.put(
-            {"configurable": {"thread_id": "t", "checkpoint_ns": ""}},
-            empty_checkpoint(),
-            {},
-            {},
-        )
-        saver.put_writes(config, [("ch", "v")], "task-1", "~__pregel_pull, node")
-        stored = saver.conn.execute(
-            "SELECT task_path FROM writes WHERE task_id = 'task-1'"
-        ).fetchall()
-    assert stored == [("~__pregel_pull, node",)]
-
-
-async def test_async_setup_migrates_legacy_writes_table_repeatably(
-    legacy_db: Path,
-) -> None:
-    for _ in range(2):
-        async with AsyncSqliteSaver.from_conn_string(str(legacy_db)) as saver:
-            await saver.setup()
-            config = await saver.aput(
-                {"configurable": {"thread_id": "t", "checkpoint_ns": ""}},
-                empty_checkpoint(),
-                {},
-                {},
-            )
-            await saver.aput_writes(
-                config, [("ch", "v")], "task-1", "~__pregel_pull, node"
-            )
-
-    async with aiosqlite.connect(legacy_db) as conn:
-        async with conn.execute(
-            "SELECT DISTINCT task_id, task_path FROM writes ORDER BY task_id"
-        ) as cur:
-            assert await cur.fetchall() == [
-                ("old-task", ""),
-                ("task-1", "~__pregel_pull, node"),
-            ]
-
-
-@pytest.fixture
-def busy_db(tmp_path: Path) -> Iterator[Path]:
-    db = tmp_path / "busy.sqlite"
-    with SqliteSaver.from_conn_string(str(db)) as saver:
-        saver.setup()
-    with closing(sqlite3.connect(db, isolation_level=None)) as writer:
-        writer.execute("BEGIN IMMEDIATE")
-        yield db
-        writer.execute("ROLLBACK")
-
-
-def test_setup_does_not_wait_on_another_writer(busy_db: Path) -> None:
-    with closing(sqlite3.connect(busy_db, timeout=0)) as conn:
-        SqliteSaver(conn).setup()
-
-
-async def test_async_setup_does_not_wait_on_another_writer(busy_db: Path) -> None:
-    async with aiosqlite.connect(busy_db, timeout=0) as conn:
-        await AsyncSqliteSaver(conn).setup()
-
-
-def _legacy_database_with_history(db: Path) -> dict:
-    root = empty_checkpoint()
-    root["channel_values"] = {"ch": "seed"}
-    root["channel_versions"] = {"ch": 1}
-    with SqliteSaver.from_conn_string(str(db)) as saver:
-        root_config = saver.put(
-            {"configurable": {"thread_id": "t", "checkpoint_ns": ""}},
-            root,
-            {},
-            {"ch": 1},
-        )
-        saver.put_writes(root_config, [("ch", "write")], "task", "~__pregel_pull, n")
-        child = saver.put(root_config, empty_checkpoint(), {}, {})
-        saver.conn.execute("ALTER TABLE writes DROP COLUMN task_path")
-        saver.conn.commit()
-    return child
-
-
-def test_read_only_legacy_database_still_reads_delta_history(tmp_path: Path) -> None:
-    db = tmp_path / "legacy.sqlite"
-    child = _legacy_database_with_history(db)
-
-    saver = SqliteSaver(sqlite3.connect(f"file:{db}?mode=ro", uri=True))
-    got = saver.get_delta_channel_history(config=child, channels=["ch"])
-
-    assert got["ch"] == {"seed": "seed", "writes": [("task", "ch", "write")]}
-
-
-async def test_async_read_only_legacy_database_still_reads_delta_history(
-    tmp_path: Path,
-) -> None:
-    db = tmp_path / "legacy.sqlite"
-    child = _legacy_database_with_history(db)
-
-    async with aiosqlite.connect(f"file:{db}?mode=ro", uri=True) as conn:
-        saver = AsyncSqliteSaver(conn)
-        got = await saver.aget_delta_channel_history(config=child, channels=["ch"])
-
-    assert got["ch"] == {"seed": "seed", "writes": [("task", "ch", "write")]}

libs/checkpoint-sqlite/uv.lock

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 [[package]]
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+version = "4.2.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
@@ -360,7 +360,7 @@ test = [
 
 [[package]]
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+version = "3.1.1"
 source = { editable = "." }
 dependencies = [
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 [[package]]

libs/checkpoint/README.md

@@ -39,12 +39,7 @@ You must pass these when invoking the graph as part of the configurable part of
 
 ```python
 {"configurable": {"thread_id": "1"}}  # valid config
-{
-    "configurable": {
-        "thread_id": "1",
-        "checkpoint_id": "0c62ca34-ac19-445d-bbb0-5b4984975b2a",
-    }
-}  # also valid config
+{"configurable": {"thread_id": "1", "checkpoint_id": "0c62ca34-ac19-445d-bbb0-5b4984975b2a"}}  # also valid config
 ```
 
 ### Serde
@@ -84,12 +79,24 @@ checkpoint = {
     "v": 4,
     "ts": "2024-07-31T20:14:19.804150+00:00",
     "id": "1ef4f797-8335-6428-8001-8a1503f9b875",
-    "channel_values": {"my_key": "meow", "node": "node"},
-    "channel_versions": {"__start__": 2, "my_key": 3, "start:node": 3, "node": 3},
+    "channel_values": {
+      "my_key": "meow",
+      "node": "node"
+    },
+    "channel_versions": {
+      "__start__": 2,
+      "my_key": 3,
+      "start:node": 3,
+      "node": 3
+    },
     "versions_seen": {
-        "__input__": {},
-        "__start__": {"__start__": 1},
-        "node": {"start:node": 2},
+      "__input__": {},
+      "__start__": {
+        "__start__": 1
+      },
+      "node": {
+        "start:node": 2
+      }
     },
 }
 

libs/checkpoint/langgraph/checkpoint/base/__init__.py

@@ -10,7 +10,6 @@ from typing import (
     NamedTuple,
     TypedDict,
     TypeVar,
-    cast,
 )
 
 from langchain_core.runnables import RunnableConfig
@@ -162,14 +161,6 @@ class DeltaChannelHistory(TypedDict):
       Always present; possibly empty. Already filtered to one channel.
       Writes stored at the target checkpoint itself are pending for the
       next super-step and are excluded.
-
-      Within a single checkpoint, writes are ordered by `writes_sort_key`,
-      `(task_path, task_id, idx)`, which is the order live execution applies
-      a super-step's task writes in. `task_id` is a hash of the path, so
-      ordering by it permutes parallel tasks writing one channel, and
-      reducers need not be order-invariant. Writes stored without a
-      `task_path` (graph input, `update_state` and `Command` updates, rows
-      predating the column) sort first, by `task_id`.
     * `seed` — the stored value at the nearest ancestor whose
       `channel_values[ch]` is populated. Omitted if the walk reached the
       root without finding any stored value (consumer treats absence as
@@ -182,20 +173,6 @@ class DeltaChannelHistory(TypedDict):
     seed: NotRequired[Any]
 
 
-def writes_sort_key(
-    task_path: str, task_id: str = "", idx: int = 0
-) -> tuple[str, str, int]:
-    """Sort key for the writes of one super-step.
-
-    Live execution applies a super-step's tasks in this order, so a saver
-    that replays stored writes, as `get_delta_channel_history` does, must
-    sort them by it too, or an order-sensitive reducer rebuilds a different
-    value than the run produced. `task_path` is the string passed to
-    `put_writes`.
-    """
-    return (task_path, task_id, idx)
-
-
 class BaseCheckpointSaver(Generic[V]):
     """Base class for creating a graph checkpointer.
 
@@ -266,8 +243,7 @@ class BaseCheckpointSaver(Generic[V]):
             config: Configuration specifying which checkpoint to retrieve.
 
         Returns:
-            The requested checkpoint tuple, or `None` if not found. Its
-                `pending_writes` must be in `writes_sort_key` order.
+            The requested checkpoint tuple, or `None` if not found.
 
         Raises:
             NotImplementedError: Implement this method in your custom checkpoint saver.
@@ -457,8 +433,7 @@ class BaseCheckpointSaver(Generic[V]):
             config: Configuration specifying which checkpoint to retrieve.
 
         Returns:
-            The requested checkpoint tuple, or `None` if not found. Its
-                `pending_writes` must be in `writes_sort_key` order.
+            The requested checkpoint tuple, or `None` if not found.
 
         Raises:
             NotImplementedError: Implement this method in your custom checkpoint saver.
@@ -635,10 +610,6 @@ class BaseCheckpointSaver(Generic[V]):
         `PostgresSaver`) override for performance; the return contract is
         fixed here.
 
-        `PendingWrite` carries no `task_path`, so this default replays each
-        checkpoint's writes in `get_tuple`'s `pending_writes` order, which
-        `get_tuple` must return in `writes_sort_key` order.
-
         Args:
             config: Configuration identifying the target checkpoint.
             channels: Channel names to walk for. Empty → empty mapping.
@@ -810,7 +781,7 @@ def get_serializable_checkpoint_metadata(
     """Get checkpoint metadata in a backwards-compatible manner."""
     checkpoint_metadata = get_checkpoint_metadata(config, metadata)
     if "writes" in checkpoint_metadata:
-        cast(dict[str, Any], checkpoint_metadata).pop("writes")
+        checkpoint_metadata.pop("writes")
     return checkpoint_metadata
 
 

libs/checkpoint/langgraph/checkpoint/memory/__init__.py

@@ -25,7 +25,6 @@ from langgraph.checkpoint.base import (
     SerializerProtocol,
     get_checkpoint_id,
     get_checkpoint_metadata,
-    writes_sort_key,
 )
 
 logger = logging.getLogger(__name__)
@@ -140,15 +139,6 @@ class InMemorySaver(
             result[k] = self.serde.loads_typed(vv)
         return result
 
-    def _ordered_writes(
-        self, thread_id: str, checkpoint_ns: str, checkpoint_id: str
-    ) -> list[tuple[str, str, tuple[str, bytes], str]]:
-        stored = self.writes.get((thread_id, checkpoint_ns, checkpoint_id), {})
-        return [
-            stored[k]
-            for k in sorted(stored, key=lambda k: writes_sort_key(stored[k][3], *k))
-        ]
-
     def get_delta_channel_history(
         self, *, config: RunnableConfig, channels: Sequence[str]
     ) -> Mapping[str, DeltaChannelHistory]:
@@ -170,8 +160,8 @@ class InMemorySaver(
             return {}
         thread_id = config["configurable"]["thread_id"]
         checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
+        checkpoint_id = config["configurable"].get("checkpoint_id", "")
         ns_storage = self.storage.get(thread_id, {}).get(checkpoint_ns, {})
-        checkpoint_id = get_checkpoint_id(config) or max(ns_storage, default="")
 
         chain: list[str] = []
         target_entry = ns_storage.get(checkpoint_id)
@@ -208,8 +198,9 @@ class InMemorySaver(
                     blob_value_by_ch[ch] = self.serde.loads_typed(blob_entry)
                     terminated_here.add(ch)
 
-            for tid, ch, serialized, _ in reversed(
-                self._ordered_writes(thread_id, checkpoint_ns, cp_id)
+            step_writes = self.writes.get((thread_id, checkpoint_ns, cp_id), {})
+            for (_task_id, _idx), (tid, ch, serialized, _) in sorted(
+                step_writes.items(), reverse=True
             ):
                 if ch not in remaining:
                     continue
@@ -255,7 +246,7 @@ class InMemorySaver(
         if checkpoint_id := get_checkpoint_id(config):
             if saved := self.storage[thread_id][checkpoint_ns].get(checkpoint_id):
                 checkpoint, metadata, parent_checkpoint_id = saved
-                writes = self._ordered_writes(thread_id, checkpoint_ns, checkpoint_id)
+                writes = self.writes[(thread_id, checkpoint_ns, checkpoint_id)].values()
                 checkpoint_: Checkpoint = self.serde.loads_typed(checkpoint)
                 return CheckpointTuple(
                     config=config,
@@ -285,7 +276,7 @@ class InMemorySaver(
             if checkpoints := self.storage[thread_id][checkpoint_ns]:
                 checkpoint_id = max(checkpoints.keys())
                 checkpoint, metadata, parent_checkpoint_id = checkpoints[checkpoint_id]
-                writes = self._ordered_writes(thread_id, checkpoint_ns, checkpoint_id)
+                writes = self.writes[(thread_id, checkpoint_ns, checkpoint_id)].values()
                 checkpoint_ = self.serde.loads_typed(checkpoint)
                 return CheckpointTuple(
                     config={
@@ -388,9 +379,9 @@ class InMemorySaver(
                     elif limit is not None:
                         limit -= 1
 
-                    writes = self._ordered_writes(
-                        thread_id, checkpoint_ns, checkpoint_id
-                    )
+                    writes = self.writes[
+                        (thread_id, checkpoint_ns, checkpoint_id)
+                    ].values()
 
                     checkpoint_: Checkpoint = self.serde.loads_typed(checkpoint)
 

libs/checkpoint/langgraph/checkpoint/serde/jsonplus.py

@@ -55,7 +55,6 @@ logger = logging.getLogger(__name__)
 _MAX_WARNED_TYPES = 1000
 _warned_unregistered_types: set[tuple[str, str]] = set()
 _warned_blocked_types: set[tuple[str, str]] = set()
-_warned_unreconstructable_types: set[tuple[str, str]] = set()
 
 
 def _is_safe_json_type(id_list: list[str]) -> bool:
@@ -80,27 +79,6 @@ def _warn_once(
     logger.warning(msg, *args)
 
 
-def _reconstruction_fallback(tup: Any, exc: Exception) -> Any:
-    """Return the serialized payload of an object that could not be rebuilt.
-
-    Returning `None` here would silently erase the value from restored state.
-    """
-    try:
-        module, name, payload = tup[0], tup[1], tup[2]
-    except Exception:
-        return None
-    _warn_once(
-        _warned_unreconstructable_types,
-        (str(module), str(name)),
-        "Could not reconstruct %s.%s from checkpoint (%s); "
-        "returning its serialized data instead.",
-        module,
-        name,
-        type(exc).__name__,
-    )
-    return payload
-
-
 class JsonPlusSerializer(SerializerProtocol):
     """Serializer that uses ormsgpack, with optional fallbacks.
 
@@ -660,7 +638,6 @@ def _create_msgpack_ext_hook(
                 )
             )
         elif code == EXT_CONSTRUCTOR_SINGLE_ARG:
-            tup = None
             try:
                 tup = ormsgpack.unpackb(
                     data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
@@ -672,10 +649,9 @@ def _create_msgpack_ext_hook(
                     return tup[2]
                 # module, name, arg
                 return getattr(importlib.import_module(tup[0]), tup[1])(tup[2])
-            except Exception as exc:
-                return _reconstruction_fallback(tup, exc)
+            except Exception:
+                return None
         elif code == EXT_CONSTRUCTOR_POS_ARGS:
-            tup = None
             try:
                 tup = ormsgpack.unpackb(
                     data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
@@ -686,10 +662,9 @@ def _create_msgpack_ext_hook(
                     return _send_from_args(tup[2])
                 # module, name, args
                 return getattr(importlib.import_module(tup[0]), tup[1])(*tup[2])
-            except Exception as exc:
-                return _reconstruction_fallback(tup, exc)
+            except Exception:
+                return None
         elif code == EXT_CONSTRUCTOR_KW_ARGS:
-            tup = None
             try:
                 tup = ormsgpack.unpackb(
                     data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
@@ -698,10 +673,9 @@ def _create_msgpack_ext_hook(
                     return tup[2]
                 # module, name, kwargs
                 return getattr(importlib.import_module(tup[0]), tup[1])(**tup[2])
-            except Exception as exc:
-                return _reconstruction_fallback(tup, exc)
+            except Exception:
+                return None
         elif code == EXT_METHOD_SINGLE_ARG:
-            tup = None
             try:
                 tup = ormsgpack.unpackb(
                     data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
@@ -712,8 +686,8 @@ def _create_msgpack_ext_hook(
                 return getattr(
                     getattr(importlib.import_module(tup[0]), tup[1]), tup[3]
                 )(tup[2])
-            except Exception as exc:
-                return _reconstruction_fallback(tup, exc)
+            except Exception:
+                return None
         elif code == EXT_PYDANTIC_V1:
             try:
                 tup = ormsgpack.unpackb(

libs/checkpoint/langgraph/store/base/__init__.py

@@ -12,7 +12,7 @@ Core types:
 from __future__ import annotations
 
 from abc import ABC, abstractmethod
-from collections.abc import Iterable, Mapping
+from collections.abc import Iterable
 from datetime import datetime
 from typing import (
     Any,
@@ -473,10 +473,10 @@ class PutOp(NamedTuple):
         the full path would effectively be `"documents/user123/report1"`
     """
 
-    value: Mapping[str, Any] | None
+    value: dict[str, Any] | None
     """The data to store, or `None` to mark the item for deletion.
 
-    The value must be a mapping with string keys and JSON-serializable values.
+    The value must be a dictionary with string keys and JSON-serializable values.
     Setting this to `None` signals that the item should be deleted.
 
     Example:
@@ -771,12 +771,7 @@ class BaseStore(ABC):
 
         Returns:
             The retrieved item or `None` if not found.
-
-        Raises:
-            InvalidNamespaceError: If a namespace label is empty, is not a string,
-                or contains a period (`.`).
         """
-        _validate_namespace_labels(namespace)
         return self.batch(
             [GetOp(namespace, str(key), _ensure_refresh(self.ttl_config, refresh_ttl))]
         )[0]
@@ -806,10 +801,6 @@ class BaseStore(ABC):
         Returns:
             List of items matching the search criteria.
 
-        Raises:
-            InvalidNamespaceError: If a `namespace_prefix` label is empty, is not a
-                string, or contains a period (`.`).
-
         ???+ example "Examples"
 
             Basic filtering:
@@ -849,7 +840,6 @@ class BaseStore(ABC):
                 Natural language search support depends on your store implementation
                 and requires proper embedding configuration.
         """
-        _validate_namespace_labels(namespace_prefix)
         return self.batch(
             [
                 SearchOp(
@@ -867,7 +857,7 @@ class BaseStore(ABC):
         self,
         namespace: tuple[str, ...],
         key: str,
-        value: Mapping[str, Any],
+        value: dict[str, Any],
         index: Literal[False] | list[str] | None = None,
         *,
         ttl: float | None | NotProvided = NOT_PROVIDED,
@@ -879,7 +869,7 @@ class BaseStore(ABC):
                 Example: `("documents", "user123")`
             key: Unique identifier within the namespace. Together with namespace forms
                 the complete path to the item.
-            value: Mapping containing the item's data. Must contain string keys
+            value: Dictionary containing the item's data. Must contain string keys
                 and JSON-serializable values.
             index: Controls how the item's fields are indexed for search:
 
@@ -897,11 +887,6 @@ class BaseStore(ABC):
                 By default, the expiration timer refreshes on both read operations (get/search)
                 and write operations (put/update), whenever the item is included in the operation.
 
-        Raises:
-            InvalidNamespaceError: If the namespace is empty, its root label is
-                `"langgraph"`, or a label is empty, is not a string, or contains a
-                period (`.`).
-
         Note:
             Indexing support depends on your store implementation.
             If you do not initialize the store with indexing capabilities,
@@ -955,12 +940,7 @@ class BaseStore(ABC):
         Args:
             namespace: Hierarchical path for the item.
             key: Unique identifier within the namespace.
-
-        Raises:
-            InvalidNamespaceError: If a namespace label is empty, is not a string,
-                or contains a period (`.`).
         """
-        _validate_namespace_labels(namespace)
         self.batch([PutOp(namespace, str(key), None, ttl=None)])
 
     def list_namespaces(
@@ -989,10 +969,6 @@ class BaseStore(ABC):
             A list of namespace tuples that match the criteria. Each tuple represents a
                 full namespace path up to `max_depth`.
 
-        Raises:
-            InvalidNamespaceError: If a `prefix` or `suffix` label is empty, is not a
-                string, or contains a period (`.`).
-
         ???+ example "Examples":
 
             Setting `max_depth=3`. Given the namespaces:
@@ -1008,8 +984,6 @@ class BaseStore(ABC):
             # [("a", "b", "c"), ("a", "b", "d"), ("a", "b", "f")]
             ```
         """
-        _validate_namespace_labels(prefix or ())
-        _validate_namespace_labels(suffix or ())
         match_conditions = []
         if prefix:
             match_conditions.append(MatchCondition(match_type="prefix", path=prefix))
@@ -1039,12 +1013,7 @@ class BaseStore(ABC):
 
         Returns:
             The retrieved item or `None` if not found.
-
-        Raises:
-            InvalidNamespaceError: If a namespace label is empty, is not a string,
-                or contains a period (`.`).
         """
-        _validate_namespace_labels(namespace)
         return (
             await self.abatch(
                 [
@@ -1083,10 +1052,6 @@ class BaseStore(ABC):
         Returns:
             List of items matching the search criteria.
 
-        Raises:
-            InvalidNamespaceError: If a `namespace_prefix` label is empty, is not a
-                string, or contains a period (`.`).
-
         ???+ example "Examples"
 
             Basic filtering:
@@ -1126,7 +1091,6 @@ class BaseStore(ABC):
                 Natural language search support depends on your store implementation
                 and requires proper embedding configuration.
         """
-        _validate_namespace_labels(namespace_prefix)
         return (
             await self.abatch(
                 [
@@ -1146,7 +1110,7 @@ class BaseStore(ABC):
         self,
         namespace: tuple[str, ...],
         key: str,
-        value: Mapping[str, Any],
+        value: dict[str, Any],
         index: Literal[False] | list[str] | None = None,
         *,
         ttl: float | None | NotProvided = NOT_PROVIDED,
@@ -1158,7 +1122,7 @@ class BaseStore(ABC):
                 Example: `("documents", "user123")`
             key: Unique identifier within the namespace. Together with namespace forms
                 the complete path to the item.
-            value: Mapping containing the item's data. Must contain string keys
+            value: Dictionary containing the item's data. Must contain string keys
                 and JSON-serializable values.
             index: Controls how the item's fields are indexed for search:
 
@@ -1176,11 +1140,6 @@ class BaseStore(ABC):
                 By default, the expiration timer refreshes on both read operations (get/search)
                 and write operations (put/update), whenever the item is included in the operation.
 
-        Raises:
-            InvalidNamespaceError: If the namespace is empty, its root label is
-                `"langgraph"`, or a label is empty, is not a string, or contains a
-                period (`.`).
-
         Note:
             Indexing support depends on your store implementation.
             If you do not initialize the store with indexing capabilities,
@@ -1242,12 +1201,7 @@ class BaseStore(ABC):
         Args:
             namespace: Hierarchical path for the item.
             key: Unique identifier within the namespace.
-
-        Raises:
-            InvalidNamespaceError: If a namespace label is empty, is not a string,
-                or contains a period (`.`).
         """
-        _validate_namespace_labels(namespace)
         await self.abatch([PutOp(namespace, str(key), None)])
 
     async def alist_namespaces(
@@ -1276,10 +1230,6 @@ class BaseStore(ABC):
             A list of namespace tuples that match the criteria. Each tuple represents a
                 full namespace path up to `max_depth`.
 
-        Raises:
-            InvalidNamespaceError: If a `prefix` or `suffix` label is empty, is not a
-                string, or contains a period (`.`).
-
         ???+ example "Examples"
 
             Setting `max_depth=3` with existing namespaces:
@@ -1295,8 +1245,6 @@ class BaseStore(ABC):
             # Returns: [("a", "b", "c"), ("a", "b", "d"), ("a", "b", "f")]
             ```
         """
-        _validate_namespace_labels(prefix or ())
-        _validate_namespace_labels(suffix or ())
         match_conditions = []
         if prefix:
             match_conditions.append(MatchCondition(match_type="prefix", path=prefix))
@@ -1315,14 +1263,6 @@ class BaseStore(ABC):
 def _validate_namespace(namespace: tuple[str, ...]) -> None:
     if not namespace:
         raise InvalidNamespaceError("Namespace cannot be empty.")
-    _validate_namespace_labels(namespace)
-    if namespace[0] == "langgraph":
-        raise InvalidNamespaceError(
-            f'Root label for namespace cannot be "langgraph". Got: {namespace}'
-        )
-
-
-def _validate_namespace_labels(namespace: tuple[str, ...]) -> None:
     for label in namespace:
         if not isinstance(label, str):
             raise InvalidNamespaceError(
@@ -1337,27 +1277,10 @@ def _validate_namespace_labels(namespace: tuple[str, ...]) -> None:
             raise InvalidNamespaceError(
                 f"Namespace labels cannot be empty strings. Got {label} in {namespace}"
             )
-
-
-def validate_op_namespace(op: Op) -> None:
-    """Validate the namespace labels an op carries before a store executes it.
-
-    `BaseStore` methods check labels before batching, but ops passed directly to
-    `batch`/`abatch` skip those methods. Stores that serialize namespaces as
-    delimited text should call this for every op they execute, so a label such
-    as `"foo.bar"` cannot address the namespace `("foo", "bar")`.
-
-    Raises:
-        InvalidNamespaceError: If a label is empty, is not a string, or contains
-            a period (`.`).
-    """
-    if isinstance(op, (GetOp, PutOp)):
-        _validate_namespace_labels(op.namespace)
-    elif isinstance(op, SearchOp):
-        _validate_namespace_labels(op.namespace_prefix)
-    elif isinstance(op, ListNamespacesOp):
-        for condition in op.match_conditions or ():
-            _validate_namespace_labels(condition.path)
+    if namespace[0] == "langgraph":
+        raise InvalidNamespaceError(
+            f'Root label for namespace cannot be "langgraph". Got: {namespace}'
+        )
 
 
 def _ensure_refresh(
@@ -1396,5 +1319,4 @@ __all__ = [
     "ensure_embeddings",
     "tokenize_path",
     "get_text_at_path",
-    "validate_op_namespace",
 ]

libs/checkpoint/langgraph/store/base/batch.py

@@ -5,7 +5,7 @@ from __future__ import annotations
 import asyncio
 import functools
 import weakref
-from collections.abc import Callable, Iterable, Mapping
+from collections.abc import Callable, Iterable
 from typing import Any, Literal, TypeVar
 
 from langgraph.store.base import (
@@ -25,7 +25,6 @@ from langgraph.store.base import (
     _ensure_refresh,
     _ensure_ttl,
     _validate_namespace,
-    _validate_namespace_labels,
 )
 
 F = TypeVar("F", bound=Callable)
@@ -87,7 +86,6 @@ class AsyncBatchedBaseStore(BaseStore):
         *,
         refresh_ttl: bool | None = None,
     ) -> Item | None:
-        _validate_namespace_labels(namespace)
         self._ensure_task()
         fut = self._loop.create_future()
         self._aqueue.put_nowait(
@@ -113,7 +111,6 @@ class AsyncBatchedBaseStore(BaseStore):
         offset: int = 0,
         refresh_ttl: bool | None = None,
     ) -> list[SearchItem]:
-        _validate_namespace_labels(namespace_prefix)
         self._ensure_task()
         fut = self._loop.create_future()
         self._aqueue.put_nowait(
@@ -135,7 +132,7 @@ class AsyncBatchedBaseStore(BaseStore):
         self,
         namespace: tuple[str, ...],
         key: str,
-        value: Mapping[str, Any],
+        value: dict[str, Any],
         index: Literal[False] | list[str] | None = None,
         *,
         ttl: float | None | NotProvided = NOT_PROVIDED,
@@ -158,7 +155,6 @@ class AsyncBatchedBaseStore(BaseStore):
         namespace: tuple[str, ...],
         key: str,
     ) -> None:
-        _validate_namespace_labels(namespace)
         self._ensure_task()
         fut = self._loop.create_future()
         self._aqueue.put_nowait((fut, PutOp(namespace, key, None)))
@@ -173,8 +169,6 @@ class AsyncBatchedBaseStore(BaseStore):
         limit: int = 100,
         offset: int = 0,
     ) -> list[tuple[str, ...]]:
-        _validate_namespace_labels(prefix or ())
-        _validate_namespace_labels(suffix or ())
         self._ensure_task()
         fut = self._loop.create_future()
         match_conditions = []
@@ -237,7 +231,7 @@ class AsyncBatchedBaseStore(BaseStore):
         self,
         namespace: tuple[str, ...],
         key: str,
-        value: Mapping[str, Any],
+        value: dict[str, Any],
         index: Literal[False] | list[str] | None = None,
         *,
         ttl: float | None | NotProvided = NOT_PROVIDED,

libs/checkpoint/langgraph/store/base/embed.py

@@ -11,7 +11,7 @@ from __future__ import annotations
 import asyncio
 import functools
 import json
-from collections.abc import Awaitable, Callable, Mapping, Sequence
+from collections.abc import Awaitable, Callable, Sequence
 from typing import Any
 
 from langchain_core.embeddings import Embeddings
@@ -244,9 +244,6 @@ def get_text_at_path(obj: Any, path: str | list[str]) -> list[str]:
         - Multi-field selection: "{field1,field2}"
         - Nested paths in multi-field: "{field1,nested.field2}"
     """
-    if isinstance(obj, Mapping) and not isinstance(obj, dict):
-        obj = dict(obj)
-
     if not path or path == "$":
         return [json.dumps(obj, sort_keys=True, ensure_ascii=False)]
 

libs/checkpoint/langgraph/store/memory/__init__.py

@@ -408,7 +408,7 @@ class InMemoryStore(BaseStore):
                 self._vectors[namespace].pop(key, None)
             else:
                 self._data[namespace][key] = Item(
-                    value=dict(op.value),
+                    value=op.value,
                     key=key,
                     namespace=namespace,
                     created_at=datetime.now(timezone.utc),

libs/checkpoint/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint"
-version = "4.3.0"
+version = "4.2.0"
 description = "Library with base interfaces for LangGraph checkpoint savers."
 authors = []
 requires-python = ">=3.10"

libs/checkpoint/tests/test_conformance_delta.py

@@ -0,0 +1,37 @@
+"""Run delta-channel conformance capabilities against InMemorySaver."""
+
+from __future__ import annotations
+
+import pytest
+
+conformance = pytest.importorskip(
+    "langgraph.checkpoint.conformance",
+    reason="langgraph-checkpoint-conformance not installed",
+)
+
+
+@pytest.mark.asyncio
+async def test_delta_channel_conformance():
+    # Imported inside the test: the module-level importorskip above is what
+    # makes these safe, so they cannot move to the top of the file.
+    from langgraph.checkpoint.conformance import validate  # noqa: PLC0415
+    from langgraph.checkpoint.conformance.initializer import (  # noqa: PLC0415
+        checkpointer_test,
+    )
+
+    from langgraph.checkpoint.memory import InMemorySaver  # noqa: PLC0415
+
+    @checkpointer_test(name="InMemorySaver")
+    async def mem_saver():
+        yield InMemorySaver()
+
+    report = await validate(
+        mem_saver,
+        capabilities={
+            "delta_channel_history",
+        },
+    )
+    for cap, result in report.results.items():
+        if result.passed is False:
+            details = "\n".join(result.failures or [])
+            pytest.fail(f"Capability {cap} failed:\n{details}")

libs/checkpoint/tests/test_jsonplus.py

@@ -7,7 +7,6 @@ import pickle
 import re
 import sys
 import tempfile
-import types
 import uuid
 from collections import deque
 from datetime import date, datetime, time, timezone
@@ -34,16 +33,12 @@ from langgraph.checkpoint.serde.event_hooks import (
     register_serde_event_listener,
 )
 from langgraph.checkpoint.serde.jsonplus import (
-    EXT_CONSTRUCTOR_KW_ARGS,
-    EXT_CONSTRUCTOR_POS_ARGS,
-    EXT_CONSTRUCTOR_SINGLE_ARG,
     EXT_METHOD_SINGLE_ARG,
     InvalidModuleError,
     JsonPlusSerializer,
     _msgpack_enc,
     _msgpack_ext_hook_to_json,
     _warned_blocked_types,
-    _warned_unreconstructable_types,
     _warned_unregistered_types,
 )
 from langgraph.store.base import Item
@@ -826,7 +821,6 @@ def _reset_warned_types() -> None:
     # a fresh slate and assertions about warning emission are stable.
     _warned_unregistered_types.clear()
     _warned_blocked_types.clear()
-    _warned_unreconstructable_types.clear()
 
 
 def test_msgpack_pydantic_warns_by_default(caplog: pytest.LogCaptureFixture) -> None:
@@ -1236,58 +1230,3 @@ def test_msgpack_nested_pydantic_serializes_as_dict(
     # No blocking should occur - inner is serialized as dict, not ext
     assert "blocked" not in caplog.text.lower()
     assert result == obj
-
-
-def test_msgpack_dataclass_from_removed_module_restores_payload(
-    monkeypatch: pytest.MonkeyPatch, caplog: pytest.LogCaptureFixture
-) -> None:
-    @dataclasses.dataclass
-    class SavedObject:
-        value: int
-
-    SavedObject.__module__ = "removed_module"
-    module = types.ModuleType("removed_module")
-    module.SavedObject = SavedObject
-    monkeypatch.setitem(sys.modules, "removed_module", module)
-    serde = JsonPlusSerializer(
-        allowed_msgpack_modules=[("removed_module", "SavedObject")]
-    )
-    dumped = serde.dumps_typed({"state": SavedObject(123)})
-    assert serde.loads_typed(dumped) == {"state": SavedObject(123)}
-
-    monkeypatch.delitem(sys.modules, "removed_module")
-    caplog.set_level(logging.WARNING, logger="langgraph.checkpoint.serde.jsonplus")
-
-    assert serde.loads_typed(dumped) == {"state": {"value": 123}}
-    assert (
-        "could not reconstruct removed_module.savedobject from checkpoint "
-        "(modulenotfounderror)" in caplog.text.lower()
-    )
-
-
-@pytest.mark.parametrize(
-    ("code", "tup", "expected"),
-    [
-        (EXT_CONSTRUCTOR_SINGLE_ARG, ("missing_module", "Thing", "x"), "x"),
-        (EXT_CONSTRUCTOR_POS_ARGS, ("missing_module", "Thing", [1, 2]), [1, 2]),
-        (
-            EXT_CONSTRUCTOR_KW_ARGS,
-            ("missing_module", "Thing", {"value": 123}),
-            {"value": 123},
-        ),
-        (
-            EXT_METHOD_SINGLE_ARG,
-            ("datetime", "datetime", "not-a-date", "fromisoformat"),
-            "not-a-date",
-        ),
-    ],
-)
-def test_msgpack_failed_reconstruction_returns_payload(
-    code: int, tup: tuple, expected: object
-) -> None:
-    serde = JsonPlusSerializer(allowed_msgpack_modules=True)
-    payload = ormsgpack.packb(
-        ormsgpack.Ext(code, _msgpack_enc(tup)), option=ormsgpack.OPT_NON_STR_KEYS
-    )
-
-    assert serde.loads_typed(("msgpack", payload)) == expected

libs/checkpoint/tests/test_memory.py

@@ -420,19 +420,6 @@ class TestInMemorySaverDeltaChannel:
         assert "seed" not in result
         assert result["writes"] == []
 
-    def test_get_channel_writes_without_checkpoint_id_reads_the_latest(self) -> None:
-        saver = InMemorySaver()
-        thread: RunnableConfig = {
-            "configurable": {"thread_id": "t1", "checkpoint_ns": ""}
-        }
-        parent = saver.put(thread, empty_checkpoint(), {}, {})
-        saver.put_writes(parent, [("messages", "hi")], "task1")
-        saver.put(parent, empty_checkpoint(), {}, {})
-
-        result = saver.get_delta_channel_history(config=thread, channels=["messages"])
-
-        assert result == {"messages": {"writes": [("task1", "messages", "hi")]}}
-
 
 class TestBaseFallbackGetChannelWrites:
     """Exercises the `BaseCheckpointSaver.get_delta_channel_history` default

libs/checkpoint/tests/test_store.py

@@ -1,9 +1,7 @@
 import asyncio
 import json
-from collections import UserDict
-from collections.abc import Iterable, Mapping
+from collections.abc import Iterable
 from datetime import datetime
-from types import MappingProxyType
 from typing import Any
 
 import pytest
@@ -13,14 +11,10 @@ from langgraph.store.base import (
     GetOp,
     InvalidNamespaceError,
     Item,
-    ListNamespacesOp,
-    MatchCondition,
     Op,
     PutOp,
     Result,
-    SearchOp,
     get_text_at_path,
-    validate_op_namespace,
 )
 from langgraph.store.base.batch import AsyncBatchedBaseStore
 from langgraph.store.memory import InMemoryStore
@@ -143,18 +137,6 @@ def test_get_text_at_path() -> None:
     assert get_text_at_path(nested_data, "nested[{invalid}]") == []
 
 
-@pytest.mark.parametrize(
-    "mapping",
-    [
-        UserDict({"text": "searchable"}),
-        MappingProxyType({"text": "searchable"}),
-    ],
-)
-def test_get_text_at_path_with_non_dict_mapping(mapping: Mapping[str, str]) -> None:
-    assert get_text_at_path(mapping, "$") == ['{"text": "searchable"}']
-    assert get_text_at_path(mapping, "text") == ["searchable"]
-
-
 async def test_async_batch_store(mocker: MockerFixture) -> None:
     abatch = mocker.stub()
 
@@ -532,127 +514,6 @@ async def test_cannot_put_empty_namespace() -> None:
     assert (await async_store.aget(("valid", "namespace"), "key")) is None
 
 
-INVALID_NAMESPACES = [("foo.bar",), ("foo", ""), (123,)]
-NAMESPACE_METHODS = ["get", "delete", "search", "prefix", "suffix"]
-
-
-@pytest.mark.parametrize("namespace", INVALID_NAMESPACES)
-@pytest.mark.parametrize("method", NAMESPACE_METHODS)
-def test_rejects_invalid_namespace_labels(
-    mocker: MockerFixture, namespace: tuple, method: str
-) -> None:
-    store = InMemoryStore()
-    batch = mocker.spy(InMemoryStore, "batch")
-    call = {
-        "get": lambda: store.get(namespace, "key"),
-        "delete": lambda: store.delete(namespace, "key"),
-        "search": lambda: store.search(namespace),
-        "prefix": lambda: store.list_namespaces(prefix=namespace),
-        "suffix": lambda: store.list_namespaces(suffix=namespace),
-    }[method]
-
-    with pytest.raises(InvalidNamespaceError):
-        call()
-
-    batch.assert_not_called()
-
-
-@pytest.mark.parametrize("batched", [False, True])
-@pytest.mark.parametrize("namespace", INVALID_NAMESPACES)
-@pytest.mark.parametrize("method", NAMESPACE_METHODS)
-async def test_async_rejects_invalid_namespace_labels(
-    mocker: MockerFixture, batched: bool, namespace: tuple, method: str
-) -> None:
-    # The batched store must reject before queueing: a failure inside the
-    # shared `abatch` would fail every op queued alongside this one.
-    store = MockAsyncBatchedStore() if batched else InMemoryStore()
-    # `MockAsyncBatchedStore` dispatches through `InMemoryStore.batch`.
-    batch = mocker.spy(InMemoryStore, "batch")
-    abatch = mocker.spy(InMemoryStore, "abatch")
-    call = {
-        "get": lambda: store.aget(namespace, "key"),
-        "delete": lambda: store.adelete(namespace, "key"),
-        "search": lambda: store.asearch(namespace),
-        "prefix": lambda: store.alist_namespaces(prefix=namespace),
-        "suffix": lambda: store.alist_namespaces(suffix=namespace),
-    }[method]
-
-    with pytest.raises(InvalidNamespaceError):
-        await call()
-
-    batch.assert_not_called()
-    abatch.assert_not_called()
-
-
-def test_search_and_listing_keep_empty_prefixes_and_wildcards() -> None:
-    store = InMemoryStore()
-    store.put(("tenant", "a_%"), "key", {"v": 1})
-    store.put(("tenant", "b", "child"), "key", {"v": 1})
-
-    assert len(store.search(())) == 2
-    assert [item.namespace for item in store.search(("tenant", "a_%"))] == [
-        ("tenant", "a_%")
-    ]
-    assert sorted(store.list_namespaces(prefix=("tenant", "*"), suffix=("*",))) == [
-        ("tenant", "a_%"),
-        ("tenant", "b", "child"),
-    ]
-
-
-@pytest.mark.parametrize("batched", [False, True])
-async def test_async_search_and_listing_keep_empty_prefixes_and_wildcards(
-    batched: bool,
-) -> None:
-    store = MockAsyncBatchedStore() if batched else InMemoryStore()
-    await store.aput(("tenant", "a_%"), "key", {"v": 1})
-    await store.aput(("tenant", "b", "child"), "key", {"v": 1})
-
-    assert len(await store.asearch(())) == 2
-    assert [item.namespace for item in await store.asearch(("tenant", "a_%"))] == [
-        ("tenant", "a_%")
-    ]
-    assert sorted(
-        await store.alist_namespaces(prefix=("tenant", "*"), suffix=("*",))
-    ) == [("tenant", "a_%"), ("tenant", "b", "child")]
-
-
-@pytest.mark.parametrize("namespace", INVALID_NAMESPACES)
-@pytest.mark.parametrize(
-    "kind", ["get", "put", "delete", "search", "list_prefix", "list_suffix"]
-)
-def test_validate_op_namespace_rejects_invalid_labels(
-    namespace: tuple, kind: str
-) -> None:
-    op = {
-        "get": GetOp(namespace, "key"),
-        "put": PutOp(namespace, "key", {"v": 1}),
-        "delete": PutOp(namespace, "key", None),
-        "search": SearchOp(namespace),
-        "list_prefix": ListNamespacesOp((MatchCondition("prefix", namespace),)),
-        "list_suffix": ListNamespacesOp((MatchCondition("suffix", namespace),)),
-    }[kind]
-
-    with pytest.raises(InvalidNamespaceError):
-        validate_op_namespace(op)
-
-
-def test_validate_op_namespace_allows_empty_prefix_and_wildcards() -> None:
-    for op in (
-        SearchOp(()),
-        ListNamespacesOp(),
-        ListNamespacesOp(
-            (
-                MatchCondition("prefix", ("tenant", "*")),
-                MatchCondition("suffix", ("*",)),
-            )
-        ),
-        GetOp(("tenant", "a_%"), "key"),
-        # Write-only rules belong to `put`, not to op validation.
-        PutOp(("langgraph", "x"), "key", {"v": 1}),
-    ):
-        validate_op_namespace(op)
-
-
 async def test_async_batch_store_deduplication(mocker: MockerFixture) -> None:
     abatch = mocker.spy(InMemoryStore, "batch")
     store = MockAsyncBatchedStore()

libs/checkpoint/uv.lock

@@ -19,16 +19,16 @@ wheels = [
 
 [[package]]
 name = "anyio"
-version = "4.14.2"
+version = "4.12.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
     { name = "idna" },
     { name = "typing-extensions", marker = "python_full_version < '3.13'" },
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+sdist = { url = "https://files.pythonhosted.org/packages/96/f0/5eb65b2bb0d09ac6776f2eb54adee6abe8228ea05b20a5ad0e4945de8aac/anyio-4.12.1.tar.gz", hash = "sha256:41cfcc3a4c85d3f05c932da7c26d0201ac36f72abd4435ba90d0464a3ffed703", size = 228685, upload-time = "2026-01-06T11:45:21.246Z" }
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+    { url = "https://files.pythonhosted.org/packages/38/0e/27be9fdef66e72d64c0cdc3cc2823101b80585f8119b5c112c2e8f5f7dab/anyio-4.12.1-py3-none-any.whl", hash = "sha256:d405828884fc140aa80a3c667b8beed277f1dfedec42ba031bd6ac3db606ab6c", size = 113592, upload-time = "2026-01-06T11:45:19.497Z" },
 ]
 
 [[package]]
@@ -183,7 +183,7 @@ name = "exceptiongroup"
 version = "1.3.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions" },
+    { name = "typing-extensions", marker = "python_full_version < '3.11'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/50/79/66800aadf48771f6b62f7eb014e352e5d06856655206165d775e675a02c9/exceptiongroup-1.3.1.tar.gz", hash = "sha256:8b412432c6055b0b7d14c310000ae93352ed6754f70fa8f7c34141f91c4e3219", size = 30371, upload-time = "2025-11-21T23:01:54.787Z" }
 wheels = [
@@ -268,10 +268,9 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.6.5"
+version = "1.5.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "httpx" },
     { name = "jsonpatch" },
     { name = "langchain-protocol" },
     { name = "langsmith" },
@@ -282,9 +281,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/ed/ed/ceecd3bfcfc77a94cf30a9f1506e907fdea447458825e01914a72d2d1a6f/langchain_core-1.6.5.tar.gz", hash = "sha256:bdb059fef65473fd444558dbb18f50901657402c43ceed9dc0fdc7b76a393c6b", size = 1007041, upload-time = "2026-09-24T18:11:06.487Z" }
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 ]
 
 [[package]]
@@ -301,7 +300,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.3.0"
+version = "4.2.0"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },
@@ -1015,14 +1014,14 @@ wheels = [
 
 [[package]]
 name = "pytest-mock"
-version = "3.16.0"
+version = "3.15.1"
 source = { registry = "https://pypi.org/simple" }
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 ]
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 [[package]]
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 [[package]]

libs/cli/README.md

@@ -103,8 +103,6 @@ The CLI uses a `langgraph.json` configuration file with these key settings:
 }
 ```
 
-Git dependencies should use credential-free URLs. The CLI conservatively scans direct `langgraph.json` dependencies, common Python package files, uv project and lock files, and common Node.js package and lock files for HTTP Git URLs with userinfo. This check is not exhaustive: generated Docker builds can copy other files, including nested requirement or constraint files, into image layers without scanning them. For private dependencies, provide short-lived credentials through your build environment's secret-backed Git credential helper. Do not store credentials in copied files such as `langgraph.json` or `pip_config_file`.
-
 See the [full documentation](https://reference.langchain.com/python/langgraph-cli) for detailed configuration options.
 
 ## Development

libs/cli/examples/graph_prerelease_reqs/deps/additional_deps/pyproject.toml

@@ -5,5 +5,5 @@ description = "Test for prerelease stuff"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-  "langgraph==1.2.6"
+  "langgraph==1.1.5"
 ]

libs/cli/examples/graph_prerelease_reqs/pyproject.toml

@@ -7,7 +7,7 @@ requires-python = ">=3.10"
 dependencies = [
   "langchain-openai==1.1.14",
   "langchain-anthropic==1.4.6",
-  "langgraph==1.2.6"
+  "langgraph==1.1.5"
 ]
 
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+    {file = "orjson-3.10.5-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:6b68742c469745d0e6ca5724506858f75e2f1e5b59a4315861f9e2b1df77775a"},
+    {file = "orjson-3.10.5-cp311-cp311-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:7d10cc1b594951522e35a3463da19e899abe6ca95f3c84c69e9e901e0bd93d38"},
+    {file = "orjson-3.10.5-cp311-cp311-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:dcbe82b35d1ac43b0d84072408330fd3295c2896973112d495e7234f7e3da2e1"},
+    {file = "orjson-3.10.5-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:10c0eb7e0c75e1e486c7563fe231b40fdd658a035ae125c6ba651ca3b07936f5"},
+    {file = "orjson-3.10.5-cp311-cp311-musllinux_1_2_aarch64.whl", hash = "sha256:53ed1c879b10de56f35daf06dbc4a0d9a5db98f6ee853c2dbd3ee9d13e6f302f"},
+    {file = "orjson-3.10.5-cp311-cp311-musllinux_1_2_x86_64.whl", hash = "sha256:099e81a5975237fda3100f918839af95f42f981447ba8f47adb7b6a3cdb078fa"},
+    {file = "orjson-3.10.5-cp311-none-win32.whl", hash = "sha256:1146bf85ea37ac421594107195db8bc77104f74bc83e8ee21a2e58596bfb2f04"},
+    {file = "orjson-3.10.5-cp311-none-win_amd64.whl", hash = "sha256:36a10f43c5f3a55c2f680efe07aa93ef4a342d2960dd2b1b7ea2dd764fe4a37c"},
+    {file = "orjson-3.10.5-cp312-cp312-macosx_10_15_x86_64.macosx_11_0_arm64.macosx_10_15_universal2.whl", hash = "sha256:68f85ecae7af14a585a563ac741b0547a3f291de81cd1e20903e79f25170458f"},
+    {file = "orjson-3.10.5-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:28afa96f496474ce60d3340fe8d9a263aa93ea01201cd2bad844c45cd21f5268"},
+    {file = "orjson-3.10.5-cp312-cp312-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:9cd684927af3e11b6e754df80b9ffafd9fb6adcaa9d3e8fdd5891be5a5cad51e"},
+    {file = "orjson-3.10.5-cp312-cp312-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:3d21b9983da032505f7050795e98b5d9eee0df903258951566ecc358f6696969"},
+    {file = "orjson-3.10.5-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:1ad1de7fef79736dde8c3554e75361ec351158a906d747bd901a52a5c9c8d24b"},
+    {file = "orjson-3.10.5-cp312-cp312-musllinux_1_2_aarch64.whl", hash = "sha256:2d97531cdfe9bdd76d492e69800afd97e5930cb0da6a825646667b2c6c6c0211"},
+    {file = "orjson-3.10.5-cp312-cp312-musllinux_1_2_x86_64.whl", hash = "sha256:d69858c32f09c3e1ce44b617b3ebba1aba030e777000ebdf72b0d8e365d0b2b3"},
+    {file = "orjson-3.10.5-cp312-none-win32.whl", hash = "sha256:64c9cc089f127e5875901ac05e5c25aa13cfa5dbbbd9602bda51e5c611d6e3e2"},
+    {file = "orjson-3.10.5-cp312-none-win_amd64.whl", hash = "sha256:b2efbd67feff8c1f7728937c0d7f6ca8c25ec81373dc8db4ef394c1d93d13dc5"},
+    {file = "orjson-3.10.5-cp38-cp38-macosx_10_15_x86_64.macosx_11_0_arm64.macosx_10_15_universal2.whl", hash = "sha256:03b565c3b93f5d6e001db48b747d31ea3819b89abf041ee10ac6988886d18e01"},
+    {file = "orjson-3.10.5-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:584c902ec19ab7928fd5add1783c909094cc53f31ac7acfada817b0847975f26"},
+    {file = "orjson-3.10.5-cp38-cp38-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:5a35455cc0b0b3a1eaf67224035f5388591ec72b9b6136d66b49a553ce9eb1e6"},
+    {file = "orjson-3.10.5-cp38-cp38-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:1670fe88b116c2745a3a30b0f099b699a02bb3482c2591514baf5433819e4f4d"},
+    {file = "orjson-3.10.5-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:185c394ef45b18b9a7d8e8f333606e2e8194a50c6e3c664215aae8cf42c5385e"},
+    {file = "orjson-3.10.5-cp38-cp38-musllinux_1_2_aarch64.whl", hash = "sha256:ca0b3a94ac8d3886c9581b9f9de3ce858263865fdaa383fbc31c310b9eac07c9"},
+    {file = "orjson-3.10.5-cp38-cp38-musllinux_1_2_x86_64.whl", hash = "sha256:dfc91d4720d48e2a709e9c368d5125b4b5899dced34b5400c3837dadc7d6271b"},
+    {file = "orjson-3.10.5-cp38-none-win32.whl", hash = "sha256:c05f16701ab2a4ca146d0bca950af254cb7c02f3c01fca8efbbad82d23b3d9d4"},
+    {file = "orjson-3.10.5-cp38-none-win_amd64.whl", hash = "sha256:8a11d459338f96a9aa7f232ba95679fc0c7cedbd1b990d736467894210205c09"},
+    {file = "orjson-3.10.5-cp39-cp39-macosx_10_15_x86_64.macosx_11_0_arm64.macosx_10_15_universal2.whl", hash = "sha256:85c89131d7b3218db1b24c4abecea92fd6c7f9fab87441cfc342d3acc725d807"},
+    {file = "orjson-3.10.5-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:fb66215277a230c456f9038d5e2d84778141643207f85336ef8d2a9da26bd7ca"},
+    {file = "orjson-3.10.5-cp39-cp39-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:51bbcdea96cdefa4a9b4461e690c75ad4e33796530d182bdd5c38980202c134a"},
+    {file = "orjson-3.10.5-cp39-cp39-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:dbead71dbe65f959b7bd8cf91e0e11d5338033eba34c114f69078d59827ee139"},
+    {file = "orjson-3.10.5-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:5df58d206e78c40da118a8c14fc189207fffdcb1f21b3b4c9c0c18e839b5a214"},
+    {file = "orjson-3.10.5-cp39-cp39-musllinux_1_2_aarch64.whl", hash = "sha256:c4057c3b511bb8aef605616bd3f1f002a697c7e4da6adf095ca5b84c0fd43595"},
+    {file = "orjson-3.10.5-cp39-cp39-musllinux_1_2_x86_64.whl", hash = "sha256:b39e006b00c57125ab974362e740c14a0c6a66ff695bff44615dcf4a70ce2b86"},
+    {file = "orjson-3.10.5-cp39-none-win32.whl", hash = "sha256:eded5138cc565a9d618e111c6d5c2547bbdd951114eb822f7f6309e04db0fb47"},
+    {file = "orjson-3.10.5-cp39-none-win_amd64.whl", hash = "sha256:cc28e90a7cae7fcba2493953cff61da5a52950e78dc2dacfe931a317ee3d8de7"},
+    {file = "orjson-3.10.5.tar.gz", hash = "sha256:7a5baef8a4284405d96c90c7c62b755e9ef1ada84c2406c24a9ebec86b89f46d"},
+]
+
+[[package]]
+name = "sniffio"
+version = "1.3.1"
+description = "Sniff out which async library your code is running under"
+optional = false
+python-versions = ">=3.7"
+groups = ["main"]
+files = [
+    {file = "sniffio-1.3.1-py3-none-any.whl", hash = "sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2"},
+    {file = "sniffio-1.3.1.tar.gz", hash = "sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc"},
+]
+
+[[package]]
+name = "typing-extensions"
+version = "4.12.2"
+description = "Backported and Experimental Type Hints for Python 3.8+"
+optional = false
+python-versions = ">=3.8"
+groups = ["main"]
+markers = "python_version < \"3.11\""
+files = [
+    {file = "typing_extensions-4.12.2-py3-none-any.whl", hash = "sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d"},
+    {file = "typing_extensions-4.12.2.tar.gz", hash = "sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8"},
+]
+
+[metadata]
+lock-version = "2.1"
+python-versions = "^3.9.0,<4.0"
+content-hash = "ec5109729f30d2033a10a10e8f8d3ed94c7d96d5d31025b4815b0123664bb063"

libs/cli/js-examples/package.json

@@ -21,28 +21,26 @@
     "test:all": "yarn test && yarn test:int && yarn lint:langgraph"
   },
   "dependencies": {
-    "@langchain/core": "^1.2.9",
-    "@langchain/langgraph": "^1.4.13"
+    "@langchain/core": "^1.2.4",
+    "@langchain/langgraph": "^1.4.8"
   },
   "resolutions": {
-    "@langchain/langgraph-checkpoint": "1.0.4",
-    "jest/**/js-yaml": "3.15.2",
-    "@eslint/eslintrc/js-yaml": "4.3.2"
+    "@langchain/langgraph-checkpoint": "1.0.4"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.6",
     "@eslint/js": "^10.0.1",
     "@tsconfig/recommended": "^1.0.13",
     "@types/jest": "^30.0.0",
-    "@typescript-eslint/eslint-plugin": "^8.68.0",
-    "@typescript-eslint/parser": "^8.68.0",
+    "@typescript-eslint/eslint-plugin": "^8.65.0",
+    "@typescript-eslint/parser": "^8.65.0",
     "dotenv": "^17.4.2",
-    "eslint": "^10.9.1",
+    "eslint": "^10.8.0",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.32.0",
     "eslint-plugin-no-instanceof": "^1.0.1",
     "eslint-plugin-prettier": "^5.5.6",
-    "jest": "^30.5.0",
+    "jest": "^30.4.2",
     "prettier": "^3.9.6",
     "ts-jest": "^29.4.12",
     "typescript": "^7.0.2"

libs/cli/js-monorepo-example/apps/agent/package.json

@@ -9,8 +9,8 @@
   },
   "dependencies": {
     "@js-monorepo-example/shared": "*",
-    "@langchain/core": "^1.2.13",
-    "@langchain/langgraph": "^1.4.18"
+    "@langchain/core": "^1.2.4",
+    "@langchain/langgraph": "^1.4.8"
   },
   "devDependencies": {
     "typescript": "^7.0.2"

libs/cli/js-monorepo-example/package.json

@@ -17,18 +17,18 @@
     "lint": "eslint 'apps/**/*.ts' 'libs/**/*.ts'"
   },
   "devDependencies": {
-    "turbo": "^2.11.5",
+    "turbo": "^2.10.8",
     "typescript": "^7.0.2",
     "@tsconfig/recommended": "^1.0.13",
-    "@eslint/eslintrc": "^3.3.7",
+    "@eslint/eslintrc": "^3.3.6",
     "@eslint/js": "^10.0.1",
-    "eslint": "^10.11.0",
+    "eslint": "^10.8.0",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.27.5",
     "eslint-plugin-no-instanceof": "^1.0.1",
     "eslint-plugin-prettier": "^5.5.6",
-    "@typescript-eslint/eslint-plugin": "^8.70.1",
-    "@typescript-eslint/parser": "^8.70.1",
-    "prettier": "^3.9.9"
+    "@typescript-eslint/eslint-plugin": "^8.65.0",
+    "@typescript-eslint/parser": "^8.65.0",
+    "prettier": "^3.9.6"
   }
 }

libs/cli/js-monorepo-example/yarn.lock

@@ -2,24 +2,6 @@
 # yarn lockfile v1
 
 
-"@cacheable/memory@^2.2.0":
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/@cacheable/memory/-/memory-2.2.0.tgz#72aeb8b051f6d597d10ac8595b94ad8302bd2239"
-  integrity sha512-CTLKqLItRCEixEAewD3/j9DB3/o96gpTPD4eJ1v+DGOlxZRZncRQkGYqqnAGCscYd6RNeXfGeiuCphsPtqyIfQ==
-  dependencies:
-    "@cacheable/utils" "^2.5.0"
-    "@keyv/bigmap" "^1.3.1"
-    hookified "^1.15.1"
-    keyv "^5.6.0"
-
-"@cacheable/utils@^2.5.0":
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/@cacheable/utils/-/utils-2.5.0.tgz#534c91113aa48fe43baedb169550b6ee070ef303"
-  integrity sha512-buipgOVDkkPXNR5+xBpDw7Zk2n1EvU7qBJCNUcL7rhQ//kfpOXPAvQ511Os0vpLYJ1pZnvudNytkQt2hst3wqA==
-  dependencies:
-    hashery "^1.5.1"
-    keyv "^5.6.0"
-
 "@cfworker/json-schema@^4.0.2":
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/@cfworker/json-schema/-/json-schema-4.1.1.tgz#4a2a3947ee9fa7b7c24be981422831b8674c3be6"
@@ -60,10 +42,10 @@
   dependencies:
     "@types/json-schema" "^7.0.15"
 
-"@eslint/eslintrc@^3.3.7":
-  version "3.3.7"
-  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-3.3.7.tgz#76d3dedec4a30ea32df797bf8a0085c1311b7316"
-  integrity sha512-F42g89Qd5oAWtp0k0nnSrjziAKza7w8SVT4mStc18LZMaRb4J1HQAHLCalEtDCxrTuksx7NU9qsmeLwpOfPqWw==
+"@eslint/eslintrc@^3.3.6":
+  version "3.3.6"
+  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-3.3.6.tgz#d22bfd6b3a7d8e1f2c0b2f2e6de111b53ec6e13e"
+  integrity sha512-l2Ul9PrHsPCKcEY/ac7VgFj9D80C7S68sOKc618SyHDPK36s1XcFebXY0iTzUVn4Yq+YbwvSnDmCz9yxjX+QrA==
   dependencies:
     ajv "^6.14.0"
     debug "^4.3.2"
@@ -71,7 +53,7 @@
     globals "^14.0.0"
     ignore "^5.2.0"
     import-fresh "^3.2.1"
-    js-yaml "^4.3.2"
+    js-yaml "^4.3.0"
     minimatch "^3.1.5"
     strip-json-comments "^3.1.1"
 
@@ -85,10 +67,10 @@
   resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.5.tgz#88e9bf4d11d2b19c082e78ebe7ce88724a5eb091"
   integrity sha512-vqTaUEgxzm+YDSdElad6PiRoX4t8VGDjCtt05zn4nU810UIx/uNEV7/lZJ6KwFThKZOzOxzXy48da+No7HZaMw==
 
-"@eslint/plugin-kit@^0.7.3":
-  version "0.7.3"
-  resolved "https://registry.yarnpkg.com/@eslint/plugin-kit/-/plugin-kit-0.7.3.tgz#cc7268cc36405b331ef92db1bc37971f21d66fe1"
-  integrity sha512-IkO+/KEUvwbVpiURZg+P7zF74z5Jxe0UgJxVni+RtoHQ6IZieXaO02kmadomap/q+l6bc/jdPGGqTjhuZnuz1Q==
+"@eslint/plugin-kit@^0.7.2":
+  version "0.7.2"
+  resolved "https://registry.yarnpkg.com/@eslint/plugin-kit/-/plugin-kit-0.7.2.tgz#4b0962f3f2c7ce8bc98b3ecfe34525c09d2cb729"
+  integrity sha512-+CNAzxglkrpNf/kKywqQfk74QjtceuOE7Qm+AF8miRvPF/wmmK5+OJOgVh3AVTT3RP2mH3+FOaxlE5v72owk0A==
   dependencies:
     "@eslint/core" "^1.2.1"
     levn "^0.4.1"
@@ -121,23 +103,10 @@
   resolved "https://registry.yarnpkg.com/@isaacs/cliui/-/cliui-9.0.0.tgz#4d0a3f127058043bf2e7ee169eaf30ed901302f3"
   integrity sha512-AokJm4tuBHillT+FpMtxQ60n8ObyXBatq7jD2/JA9dxbDDokKQm8KMht5ibGzLVU9IJDIKK4TPKgMHEYMn3lMg==
 
-"@keyv/bigmap@^1.3.1":
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/@keyv/bigmap/-/bigmap-1.3.1.tgz#fc82fa83947e7ff68c6798d08907db842771ef2c"
-  integrity sha512-WbzE9sdmQtKy8vrNPa9BRnwZh5UF4s1KTmSK0KUVLo3eff5BlQNNWDnFOouNpKfPKDnms9xynJjsMYjMaT/aFQ==
-  dependencies:
-    hashery "^1.4.0"
-    hookified "^1.15.0"
-
-"@keyv/serialize@^1.1.1":
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/@keyv/serialize/-/serialize-1.1.1.tgz#0c01dd3a3483882af7cf3878d4e71d505c81fc4a"
-  integrity sha512-dXn3FZhPv0US+7dtJsIi2R+c7qWYiReoEh5zUntWCf4oSpMNib8FDhSoed6m3QyZdx5hK7iLFkYk3rNxwt8vTA==
-
-"@langchain/core@^1.2.13":
-  version "1.2.13"
-  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.2.13.tgz#4ea4eb0308a25af350f75de2fbf34aecb819177e"
-  integrity sha512-ADGTxZ84n3civruUX1LlTOdua/PDGoni2U6TmKTX7hvRU2Jlepu8vLJI4Wnwj45KUKhUCrW94Il12Q2bxE3e8A==
+"@langchain/core@^1.2.4":
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.2.4.tgz#3916181e00f93b2e3b5801ab8273c07d144d75ce"
+  integrity sha512-GIrJktdsFPx8gM0C3VyikkeYGZAV7iRIzUJuS5tFatiKLExybou0LI0MuxH9kksN38quyfWdQDl20lIEAEVkVA==
   dependencies:
     "@cfworker/json-schema" "^4.0.2"
     "@standard-schema/spec" "^1.1.0"
@@ -147,35 +116,35 @@
     p-queue "^6.6.2"
     zod "^3.25.76 || ^4"
 
-"@langchain/langgraph-checkpoint@^1.1.5":
-  version "1.1.5"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-checkpoint/-/langgraph-checkpoint-1.1.5.tgz#c793177f9afcce31a1e9922f317f88fec1254282"
-  integrity sha512-BwDwl5VeTOh6CVuiIPgsUgfK51vTJDMSbFcSCUfjJWsl8/DPdK/mbv+ejxJstkSk/BlSPMP4JfXWcN6jD2ea2Q==
+"@langchain/langgraph-checkpoint@^1.1.3":
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-checkpoint/-/langgraph-checkpoint-1.1.3.tgz#891f2f9a2e96cf2ab0920f9240f9ad1e0a86a4ab"
+  integrity sha512-wgzdQNeEsdw1e+4lvlj0tdq/RYR/k1vPin10g0ymGoehZDDgd9nvIllGXSXN4TFgF9sf5qQP/KTkOcLfeseIhA==
 
-"@langchain/langgraph-sdk@~1.12.0":
-  version "1.12.0"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.12.0.tgz#b063a7eba0a66f51cbc841a824626a47eca1eec9"
-  integrity sha512-F3AOZjKZRUGmE3FzY+RaVZI6WzXOkwnuF7jqgto6rDPSnO9OdVdYGvwGDi3jjRGf5xLoDtX2dpsR9z5KptU+5A==
+"@langchain/langgraph-sdk@~1.9.26":
+  version "1.9.28"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.9.28.tgz#1664cc7b6f2c1509ddffecf17d805a26e70a7e1a"
+  integrity sha512-4j3XuM0PvtmAbL8mPfBS99ez3+ytRfgbOpAR/nOeaejTRF3Q9dNw2QnaGLGng8wLPtGLoSj+SYgUOVxy9Bv9vg==
   dependencies:
-    "@langchain/protocol" "^0.0.19"
+    "@langchain/protocol" "^0.0.18"
     "@types/json-schema" "^7.0.15"
     p-queue "^9.0.1"
     p-retry "^7.1.1"
 
-"@langchain/langgraph@^1.4.18":
-  version "1.4.18"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.4.18.tgz#c8cc4ea734834262fdb00ae6a45a0849620e4fd2"
-  integrity sha512-yrMMJ9hk2NVMD2xU2WoVrgFawAU6s/RzEl/dX9BhlyxZHazo1wHY35z4K2BIBzTUh4z3giCzrUoqRAqW2CWpWg==
+"@langchain/langgraph@^1.4.8":
+  version "1.4.8"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.4.8.tgz#65ef5635b5554cd32f502a3808b92d8371998a99"
+  integrity sha512-DN1Np1XefdBEbp1qBKlt39cwoL743AAGpR5Ipja0gY2YbWvsoQnOTIrjnj/orSAhaUYsdTKS8VSWdFzsHZo6Ig==
   dependencies:
-    "@langchain/langgraph-checkpoint" "^1.1.5"
-    "@langchain/langgraph-sdk" "~1.12.0"
-    "@langchain/protocol" "^0.0.19"
+    "@langchain/langgraph-checkpoint" "^1.1.3"
+    "@langchain/langgraph-sdk" "~1.9.26"
+    "@langchain/protocol" "^0.0.18"
     "@standard-schema/spec" "1.1.0"
 
-"@langchain/protocol@^0.0.19":
-  version "0.0.19"
-  resolved "https://registry.yarnpkg.com/@langchain/protocol/-/protocol-0.0.19.tgz#7fe43fed115dc34b3b4c246e8d5283fbcbfab7b0"
-  integrity sha512-9hKcRrH7cBX6gfutdfXPoft1OCchHe4FEpALoDJMl5Qu+n/YG5ynZmyu8+8cxORlPwHBoKTxggvXz+76M1yX1Q==
+"@langchain/protocol@^0.0.18":
+  version "0.0.18"
+  resolved "https://registry.yarnpkg.com/@langchain/protocol/-/protocol-0.0.18.tgz#6d96155e7263c958fbce6d4b7241b4725b72fbad"
+  integrity sha512-XW1egQtPfsGI41w2AMZNFZrUIwFSQHTjVMZs0OaTpCAvht/QLoaPN8FQcsysMVypOhupG28J29yOorrc70otBQ==
 
 "@pkgr/core@^0.3.6":
   version "0.3.6"
@@ -197,35 +166,35 @@
   resolved "https://registry.yarnpkg.com/@tsconfig/recommended/-/recommended-1.0.13.tgz#269fce3ad04ca70b93269ff44cca81b950f542da"
   integrity sha512-sySRuBfMKyKO/j2ZAhR8kSembhjuPEV4Ra3AHtmWLq51+iGaudr45crPSzNC5b7/Ctrh9dfUpBuTlYrH6rM58Q==
 
-"@turbo/darwin-64@2.11.5":
-  version "2.11.5"
-  resolved "https://registry.yarnpkg.com/@turbo/darwin-64/-/darwin-64-2.11.5.tgz#6ddc580c2b7d05e578ca1c06b3f61473f4b7b00e"
-  integrity sha512-KdY4y7BBjIisl+jAkb3FFaRjClGqHyaeHCcVcCT8LBzFFwUu6thgfxyRZAx0uL4KoxLmH+iOan8UhVf/aDDcaA==
+"@turbo/darwin-64@2.10.8":
+  version "2.10.8"
+  resolved "https://registry.yarnpkg.com/@turbo/darwin-64/-/darwin-64-2.10.8.tgz#0ae7cde6b95b82b0a4fe406ffea64bdfcf68a0ee"
+  integrity sha512-po+7rfJfUnFXjWlcoN2RwhErgzCdRtBc1T26vYPcywHlggmCQiQe1uWaE4j+BibI2uY9/2pDoFzMN0rmSaPFOw==
 
-"@turbo/darwin-arm64@2.11.5":
-  version "2.11.5"
-  resolved "https://registry.yarnpkg.com/@turbo/darwin-arm64/-/darwin-arm64-2.11.5.tgz#a756c67bb828cd00d03e909769dd39453c1f1e69"
-  integrity sha512-ToZDGi2u410+TfRtC/O1/LpujGgvNJoRBZnwVXob7oO0+3OSlwIO3zofXKUvwQvlba7a8ZXPyCZwufjAXd7f0w==
+"@turbo/darwin-arm64@2.10.8":
+  version "2.10.8"
+  resolved "https://registry.yarnpkg.com/@turbo/darwin-arm64/-/darwin-arm64-2.10.8.tgz#18a9127c0a0d9c5ad7de49bdb27e7032f8946334"
+  integrity sha512-+zB2btDJ00lnPRuqOvpVvgl4x34k/djZQGZTTCfjn7JgNCl8QFY5Njo5+dqkY1g/+9gbbsnAvWm9CmJg9ebcXA==
 
-"@turbo/linux-64@2.11.5":
-  version "2.11.5"
-  resolved "https://registry.yarnpkg.com/@turbo/linux-64/-/linux-64-2.11.5.tgz#b95c05218aebb06c06e5f991d48c55b78dc5e005"
-  integrity sha512-Ub2d/nAbdWLaSytcEaPp1wm/YuIvHEIqNrCRMI/UgOGyFdOhgxm8VyWPAJilQWRYxYVrqEUoy2K5S5K8SG50rA==
+"@turbo/linux-64@2.10.8":
+  version "2.10.8"
+  resolved "https://registry.yarnpkg.com/@turbo/linux-64/-/linux-64-2.10.8.tgz#1677672f5760d272c0a0608686fe8b8b29491fdb"
+  integrity sha512-K1dxqiVisyN7cViVsfQLs6xscQbYuI8aO2nbUhFURDACgEDfZRdP/b4CCxeosBJpcMfhYyiibWqJorCnvz9kKg==
 
-"@turbo/linux-arm64@2.11.5":
-  version "2.11.5"
-  resolved "https://registry.yarnpkg.com/@turbo/linux-arm64/-/linux-arm64-2.11.5.tgz#c7a1d1a44c8c8dcff4b72fbafe9a5059c8fb668a"
-  integrity sha512-JQjmGxp724Wuft9FAxPMtmBur1CEdUyxJ+FVoIvKkgj63rXHl9PYCWrsU2tMjVi609XTQ3M8vZD9Yc9qVAVYrw==
+"@turbo/linux-arm64@2.10.8":
+  version "2.10.8"
+  resolved "https://registry.yarnpkg.com/@turbo/linux-arm64/-/linux-arm64-2.10.8.tgz#dbdb5aef9e53bb4c88357dafc19f79138ec29253"
+  integrity sha512-Gi77ibVnrE1fEmvr+/wBD/yvRqhwp/RQuCp2+//lv1U1wNFFyVg0V7Wj8FG9FXPFAw5QHReo8rxc9+wBSDZjzA==
 
-"@turbo/windows-64@2.11.5":
-  version "2.11.5"
-  resolved "https://registry.yarnpkg.com/@turbo/windows-64/-/windows-64-2.11.5.tgz#60bdaaa7e8ba32f32623b31a1c75f6c3db400a0c"
-  integrity sha512-AFkbPmXNd8XgCi/66YEHR2bVl3gtusXyDihTIVEPAuSB+7ulLmJePvz1unWPVKLHdbCTTIdKq2mpJ1B1e3lJXw==
+"@turbo/windows-64@2.10.8":
+  version "2.10.8"
+  resolved "https://registry.yarnpkg.com/@turbo/windows-64/-/windows-64-2.10.8.tgz#451c3b5421c9ce573c764b1efacae5ad4d1312ee"
+  integrity sha512-znnLO1haJPYTHoKMKwlAvlkjRiYbbhBzME6wIGaMd+fwir23U6jVd1ecaTWWi1fbnRVqxMfgDBKseQ/hLKb83g==
 
-"@turbo/windows-arm64@2.11.5":
-  version "2.11.5"
-  resolved "https://registry.yarnpkg.com/@turbo/windows-arm64/-/windows-arm64-2.11.5.tgz#18bd5a0ad30c4e094995786bd78916b6de6b5c1c"
-  integrity sha512-52ziXYP3snGOxjv19xA3WL1WDKv9Q6uDAa/7EKIR5j4hocMlYURkrOHbJ2ZZI+VfPU5MwKpcGeRfHxHJu7Y/Pw==
+"@turbo/windows-arm64@2.10.8":
+  version "2.10.8"
+  resolved "https://registry.yarnpkg.com/@turbo/windows-arm64/-/windows-arm64-2.10.8.tgz#5661ca9b75713aece06d319493e48a366a4cd05c"
+  integrity sha512-VN30vh3b3Czh2WzYHNTfF1FE0YMZ5aHsLO8dBMGHJewA6792wX6iJR8ZxlzFW6WdOu0gEAKIvlYhfyT81Wkm4Q==
 
 "@types/esrecurse@^4.3.1":
   version "4.3.1"
@@ -247,110 +216,110 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==
 
-"@typescript-eslint/eslint-plugin@^8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.70.1.tgz#d404bac4cb04e4dcd20086e46e13c952bd0771e0"
-  integrity sha512-nDNrUQ/4ruSNYbu749TRY7cfrzPtoLHEXSNBI8aaNY32LlZCajixqRf3FqcKC4p5Cam4VOHYx/t+i5+nKXvrqA==
+"@typescript-eslint/eslint-plugin@^8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.65.0.tgz#0a58df6fea8c0bf6b396f518077099bc8b762bb5"
+  integrity sha512-IEgob78X12rHpUmtcwFsXhZdVGJtwTVP8FiCLZkR6GlYVrl2PcuB+KhCE5BlVC/eQpQnu8WXRtkHZuPar+gCRA==
   dependencies:
     "@eslint-community/regexpp" "^4.12.2"
-    "@typescript-eslint/scope-manager" "8.70.1"
-    "@typescript-eslint/type-utils" "8.70.1"
-    "@typescript-eslint/utils" "8.70.1"
-    "@typescript-eslint/visitor-keys" "8.70.1"
+    "@typescript-eslint/scope-manager" "8.65.0"
+    "@typescript-eslint/type-utils" "8.65.0"
+    "@typescript-eslint/utils" "8.65.0"
+    "@typescript-eslint/visitor-keys" "8.65.0"
     ignore "^7.0.5"
     natural-compare "^1.4.0"
     ts-api-utils "^2.5.0"
 
-"@typescript-eslint/parser@^8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.70.1.tgz#6c99b7b954efc05dae179001c8b477d1a8948dcf"
-  integrity sha512-nO974WLllwhSFWQXnMLj6nDGa8f0khKEz1JzpPJ1u7Vm/4X1X6ZHajpoknU4bb41vJyMB0HHVyS2GqdhWfIXZw==
+"@typescript-eslint/parser@^8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.65.0.tgz#5295c1058c0a1dd746ef28baaf9c0341dbdf03dc"
+  integrity sha512-CZ4nMxWwgu1HEEFNkeaCptra9QCtkmKdgf3sWh1rl1trIhmxLilgTV4cwcbQ4wemnT4sWQN8CaKOmdYx+g2gMA==
   dependencies:
-    "@typescript-eslint/scope-manager" "8.70.1"
-    "@typescript-eslint/types" "8.70.1"
-    "@typescript-eslint/typescript-estree" "8.70.1"
-    "@typescript-eslint/visitor-keys" "8.70.1"
+    "@typescript-eslint/scope-manager" "8.65.0"
+    "@typescript-eslint/types" "8.65.0"
+    "@typescript-eslint/typescript-estree" "8.65.0"
+    "@typescript-eslint/visitor-keys" "8.65.0"
     debug "^4.4.3"
 
-"@typescript-eslint/project-service@8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.70.1.tgz#d5635594cc8a573f0e15a772b1704e93a00134c1"
-  integrity sha512-62xOgboPfwc3/IgPSX/W6oQR3ZbF04194FPGUGH8HL8iLFHbt/456/8Ph1wLNUgVF+s94FlHoipBsz+v7+LMnA==
+"@typescript-eslint/project-service@8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.65.0.tgz#65fbbc9a1591abffaeab5513200f848271cb0aa5"
+  integrity sha512-SxnPhbTsGahizDgbu7oqFH/xVtzIqMd/s+WtnSxNxJZJpLbdT5IPdzg8EZxO3+PoKahXmwJLeNQOpKJb3/bi7Q==
   dependencies:
-    "@typescript-eslint/tsconfig-utils" "^8.70.1"
-    "@typescript-eslint/types" "^8.70.1"
+    "@typescript-eslint/tsconfig-utils" "^8.65.0"
+    "@typescript-eslint/types" "^8.65.0"
     debug "^4.4.3"
 
-"@typescript-eslint/scope-manager@8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.70.1.tgz#0feeae4da2d279b960cdbfe5e0a02fbf1195e93f"
-  integrity sha512-Pa0EeSeAusQc1WbjQMac+YfenewYTBu0KjgYvkUKwhXaHUKbFog23Dm/rp0DX/6tyYOQ3Xl1a+3EcFNZynGHCw==
+"@typescript-eslint/scope-manager@8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.65.0.tgz#9547202ce7e608e7b6283df585703b980a0ea70d"
+  integrity sha512-Esbl8OSYiVxBokYgWPf7VVWg/BE798wXhimnn9ML9Pt5qoDf8bfQlgjlKXR/k98+AcNzlLKYrpCcrcuZ9DZLgg==
   dependencies:
-    "@typescript-eslint/types" "8.70.1"
-    "@typescript-eslint/visitor-keys" "8.70.1"
+    "@typescript-eslint/types" "8.65.0"
+    "@typescript-eslint/visitor-keys" "8.65.0"
 
-"@typescript-eslint/tsconfig-utils@8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.70.1.tgz#e9353a6e5f3498a29b40946ca3e11f6166fef09e"
-  integrity sha512-jumze1fPI+sDOaM2TWGQdn39PDxTr7TZGeuyLkAbNyx2vtMT3uRnVKChN0hfht5V2TugphJzF6bYXvBcE09qqg==
+"@typescript-eslint/tsconfig-utils@8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.65.0.tgz#36f168fcdbb1295f7446ff0379667f98c3cf1bf3"
+  integrity sha512-j6GzGqCiRdA7Qhur2VVmKZAkBLfnHFQfx4TaJGL9RMveZqCo48jSHHO0DTgizEnGhtWnqmbtCUSrqSkdiY/0Hg==
 
-"@typescript-eslint/tsconfig-utils@^8.70.1":
-  version "8.71.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.71.0.tgz#83a69c9a514af8f5ff099cc6c0d609c273e8f039"
-  integrity sha512-Z1UlWHADEK2Mlb9NpWfDeSjqoZ5EyrOv4R3eQpbkzqn/EwaIdOpXXupEA1+0ZIOSJSZZDBHG0BrQyN8zUG6Pwg==
+"@typescript-eslint/tsconfig-utils@^8.65.0":
+  version "8.66.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.66.0.tgz#3a89066c507aa30541dc176804685b4b444e1e52"
+  integrity sha512-9D5gLYZG4rOjcoag8MQ/fWI8WqA9wcPDyOGyWtWFhvM1lHRbliqUSPIY5J3zqCU1tvSwzXxnnjhQhz5Ne7mJ4g==
 
-"@typescript-eslint/type-utils@8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.70.1.tgz#6ea36f2c7dc0776c1c8e1c380b4896f00bc4c27f"
-  integrity sha512-7zKTnyvaVWqzLZHPFQtX1hVHqgkMC+WebPWakNCSyrQVbIP1AM0L0TlBZtACldIRb6PptI8Odk+jyZ5kP3B1VA==
+"@typescript-eslint/type-utils@8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.65.0.tgz#d316d7522d93cff4cd14f305e02f3df2d804f9c1"
+  integrity sha512-YjaZ7PRI5qY7ax2L3PbvX0rRyGtipAReCWs0mhhDBHjH/vl0g0BonaGXrKdKpMbIIsMIwDgbk/xzkBTyAltS5g==
   dependencies:
-    "@typescript-eslint/types" "8.70.1"
-    "@typescript-eslint/typescript-estree" "8.70.1"
-    "@typescript-eslint/utils" "8.70.1"
+    "@typescript-eslint/types" "8.65.0"
+    "@typescript-eslint/typescript-estree" "8.65.0"
+    "@typescript-eslint/utils" "8.65.0"
     debug "^4.4.3"
     ts-api-utils "^2.5.0"
 
-"@typescript-eslint/types@8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.70.1.tgz#2022b9d07d057174eba25b9bbd289641d262a196"
-  integrity sha512-Dm1ypdhhrGCTyyehxElhgJ6kgk8MVCv5qXdoOVqPr1uqk42jX8KjrZqhROvdShczA8qrDoYiOWn1ykWlx2k81Q==
+"@typescript-eslint/types@8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.65.0.tgz#3e86738416a777c8b8925ab46745f48ecf904c9f"
+  integrity sha512-JSSwWNy+H0E/01jJEM+hrX6N0OFDzFzeIhHFSAS01tlVaevpG8cFyYRPhS5yjGOvBUx3sqQHVMjCL1CAZZMxBg==
 
-"@typescript-eslint/types@^8.70.1":
-  version "8.71.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.71.0.tgz#a230a121e71665060afe27d1f1ad110371f9451e"
-  integrity sha512-cJ4OoxPGWvFnBTnSZyaU+qJzGTqPTGJY+gDchj6cRyLRdmIdt4rcsE4twj+zPfrNiWuVi38wijHzShL++Z9atQ==
+"@typescript-eslint/types@^8.65.0":
+  version "8.66.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.66.0.tgz#3cacab94d3b564c1d48c56eb37b89f89a6d48479"
+  integrity sha512-H6gcYaSDOyvL3AD/jHUtUFo2jqGgn/F6nuyuZSu0QTesxL+cP4dQoIMrODRofuJC09g64+WgZ6tE19Y1N2YIFQ==
 
-"@typescript-eslint/typescript-estree@8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.70.1.tgz#ced48fee6f7043835d2edfed9786ae74813a3c99"
-  integrity sha512-TU8PwyGN0PQJUcE96mw8eCQ44SmxGdQlJmlWakHaHQ15eIuuvye5yNtmh/i6oS88jzXVQB71xdNkbkB/fMwL0g==
+"@typescript-eslint/typescript-estree@8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.65.0.tgz#f1f514808f6aa713e2d678ae8ff592a65e1632af"
+  integrity sha512-JboAE2swaYt4tb1fHhHTABE2K+OLy09XfcTbhnk4Pw96f9dd2e9iYsJ28gBggHlo5z5x1rkyWvcPoTuNTd4oGg==
   dependencies:
-    "@typescript-eslint/project-service" "8.70.1"
-    "@typescript-eslint/tsconfig-utils" "8.70.1"
-    "@typescript-eslint/types" "8.70.1"
-    "@typescript-eslint/visitor-keys" "8.70.1"
+    "@typescript-eslint/project-service" "8.65.0"
+    "@typescript-eslint/tsconfig-utils" "8.65.0"
+    "@typescript-eslint/types" "8.65.0"
+    "@typescript-eslint/visitor-keys" "8.65.0"
     debug "^4.4.3"
     minimatch "^10.2.2"
     semver "^7.7.3"
     tinyglobby "^0.2.15"
     ts-api-utils "^2.5.0"
 
-"@typescript-eslint/utils@8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.70.1.tgz#6a97887cee702df513692f5cdc7f79baeef48e02"
-  integrity sha512-Esgul8MsnKnRLdYU2Eb2cRV9bS5HJYtKj1ByJnOzzG2M58DGdSUQ1jUuILxipqcpB2h9WLrbD5GijIWUjX/Tqw==
+"@typescript-eslint/utils@8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.65.0.tgz#afedd974a0c8deeef553b509df5800bafd615a72"
+  integrity sha512-gXiwIHsYreboxeJucHKPvgwl7dXt50mF8s1/c00cP/WoVTyWKFdtfhRWwZiXYFU5H2O8vVoSLNrexFZjYS/SGA==
   dependencies:
     "@eslint-community/eslint-utils" "^4.9.1"
-    "@typescript-eslint/scope-manager" "8.70.1"
-    "@typescript-eslint/types" "8.70.1"
-    "@typescript-eslint/typescript-estree" "8.70.1"
+    "@typescript-eslint/scope-manager" "8.65.0"
+    "@typescript-eslint/types" "8.65.0"
+    "@typescript-eslint/typescript-estree" "8.65.0"
 
-"@typescript-eslint/visitor-keys@8.70.1":
-  version "8.70.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.70.1.tgz#b4cde0ed16982bd963a6310fcae554f59fd14124"
-  integrity sha512-Vwj9lUIW5Xq3wQ9w6gv3R86g1hMK8f2zNOdGTAgeXUMMXFK78G9ruCjjqutHMNJc0+CH7LYRnHeUB9IT8wFmcw==
+"@typescript-eslint/visitor-keys@8.65.0":
+  version "8.65.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.65.0.tgz#e3704c13cb4a1c22454c1abf28ff4737e15018c6"
+  integrity sha512-8C71BQkGjiMmXtop7pHVJu1l2NNShFdkCyD6a2ezzs5vU/L3LRtb69EtcteFwz0mYMPzIgOw0n6OV4VBUWZd7A==
   dependencies:
-    "@typescript-eslint/types" "8.70.1"
+    "@typescript-eslint/types" "8.65.0"
     eslint-visitor-keys "^5.0.0"
 
 "@typescript/typescript-aix-ppc64@7.0.2":
@@ -595,17 +564,6 @@ brace-expansion@^5.0.8:
   dependencies:
     balanced-match "^4.0.2"
 
-cacheable@^2.5.0:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/cacheable/-/cacheable-2.5.0.tgz#d142d41043e5a865f6053cc70ef4e3ad068bd5ce"
-  integrity sha512-60cyAOytib/OzBw1JNSoSV/boK1AtHryDIjvVBk7XbN4ugfkM3+Sry7fEjNgPMGgOjuaZPAp8ruZ0Cxafwyq9g==
-  dependencies:
-    "@cacheable/memory" "^2.2.0"
-    "@cacheable/utils" "^2.5.0"
-    hookified "^1.15.0"
-    keyv "^5.6.0"
-    qified "^0.10.1"
-
 call-bind-apply-helpers@^1.0.0, call-bind-apply-helpers@^1.0.1, call-bind-apply-helpers@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/call-bind-apply-helpers/-/call-bind-apply-helpers-1.0.2.tgz#4b5428c222be985d79c3d82657479dbe0b59b2d6"
@@ -923,17 +881,17 @@ eslint-visitor-keys@^5.0.0, eslint-visitor-keys@^5.0.1:
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz#9e3c9489697824d2d4ce3a8ad12628f91e9f59be"
   integrity sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==
 
-eslint@^10.11.0:
-  version "10.11.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.11.0.tgz#304d1591b7c6a327e3f64b4f550f99fda160ae20"
-  integrity sha512-P7a6UEEqb9G95MYAtqkmsTbVXIYyzIfl6NGOIJk162PaahFxFyeGcrlXYFSiagECg4sEm8IseJdZBKR3rx6MsQ==
+eslint@^10.8.0:
+  version "10.8.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.8.0.tgz#e6d19907a3f090a53a022261ba34c5ff6d04908b"
+  integrity sha512-nuKKvN+oIBO0koN7Tm7dlkmnkc21mtt0QJLwAKzjLq14y6lRTdVG36MZHJ8eQHwdJMwZbQNMlPOYedMq/oVJvQ==
   dependencies:
     "@eslint-community/eslint-utils" "^4.8.0"
     "@eslint-community/regexpp" "^4.12.2"
     "@eslint/config-array" "^0.23.5"
     "@eslint/config-helpers" "^0.7.0"
     "@eslint/core" "^1.2.1"
-    "@eslint/plugin-kit" "^0.7.3"
+    "@eslint/plugin-kit" "^0.7.2"
     "@humanfs/node" "^0.16.6"
     "@humanwhocodes/module-importer" "^1.0.1"
     "@humanwhocodes/retry" "^0.4.2"
@@ -948,7 +906,7 @@ eslint@^10.11.0:
     esquery "^1.7.0"
     esutils "^2.0.2"
     fast-deep-equal "^3.1.3"
-    file-entry-cache "11.1.5 || >11.1.6 <12"
+    file-entry-cache "^8.0.0"
     find-up "^5.0.0"
     glob-parent "^6.0.2"
     ignore "^5.2.0"
@@ -1036,12 +994,12 @@ fdir@^6.5.0:
   resolved "https://registry.yarnpkg.com/fdir/-/fdir-6.5.0.tgz#ed2ab967a331ade62f18d077dae192684d50d350"
   integrity sha512-tIbYtZbucOs0BRGqPJkshJUYdL+SDH7dVM8gjy+ERp3WAUjLEFJE+02kanyHtwjWOnwrKYBiwAmM0p4kLJAnXg==
 
-"file-entry-cache@11.1.5 || >11.1.6 <12":
-  version "11.1.5"
-  resolved "https://registry.yarnpkg.com/file-entry-cache/-/file-entry-cache-11.1.5.tgz#c8210eb055de63e68685ccfb6a017e386d4577d0"
-  integrity sha512-+PFTHITI08JIGhnNpGNI8T8inUpgZfk3GNEqfT9R2zZV2iFXg3CvqzSl/uEhs7TSGujYRELEANyDvS8Fj7+S7Q==
+file-entry-cache@^8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/file-entry-cache/-/file-entry-cache-8.0.0.tgz#7787bddcf1131bffb92636c69457bbc0edd6d81f"
+  integrity sha512-XXTUwCvisa5oacNGRP9SfNtYBNAMi+RPwBFmblZEF7N7swHYQS6/Zfk7SRwx4D5j3CH211YNRco1DEMNVfZCnQ==
   dependencies:
-    flat-cache "^6.1.23"
+    flat-cache "^4.0.0"
 
 find-up@^5.0.0:
   version "5.0.0"
@@ -1051,19 +1009,18 @@ find-up@^5.0.0:
     locate-path "^6.0.0"
     path-exists "^4.0.0"
 
-flat-cache@^6.1.23:
-  version "6.1.23"
-  resolved "https://registry.yarnpkg.com/flat-cache/-/flat-cache-6.1.23.tgz#735dc888c271868d7301b3bbb8edba5028afb61d"
-  integrity sha512-f++BY9pTk+983xK1FLzlLpmM0i0z+jHmx3QESGkURMXujQZz1k5wzwX6hjnQ8goaD0B+sYnDK1yZ6MTyZfUaqA==
+flat-cache@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/flat-cache/-/flat-cache-4.0.1.tgz#0ece39fcb14ee012f4b0410bd33dd9c1f011127c"
+  integrity sha512-f7ccFPK3SXFHpx15UIGyRJ/FJQctuKZ0zVuN3frBo4HnK3cay9VEW0R6yPYFHC0AgqhukPzKjq22t5DmAyqGyw==
   dependencies:
-    cacheable "^2.5.0"
-    flatted "^3.4.2"
-    hookified "^1.15.0"
+    flatted "^3.2.9"
+    keyv "^4.5.4"
 
-flatted@^3.4.2:
-  version "3.4.4"
-  resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.4.4.tgz#aeeca2a506303f0cee61c59e6c9f2a88d2f29fc6"
-  integrity sha512-5+ybhBZANEJxaH3X5evAFatUxLfEHSr7n6kYJ+1Qd0mUqr4eu9gIf6GDbWHf8RJijHrjjO8G+la14SlL2SeS1Q==
+flatted@^3.2.9:
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.4.2.tgz#f5c23c107f0f37de8dbdf24f13722b3b98d52726"
+  integrity sha512-PjDse7RzhcPkIJwy5t7KPWQSZ9cAbzQXcafsetQoD7sOJRQlGikNbx7yZp2OotDnJyrDcbyRq3Ttb18iYOqkxA==
 
 for-each@^0.3.3, for-each@^0.3.5:
   version "0.3.5"
@@ -1183,13 +1140,6 @@ has-tostringtag@^1.0.2:
   dependencies:
     has-symbols "^1.0.3"
 
-hashery@^1.4.0, hashery@^1.5.1:
-  version "1.5.1"
-  resolved "https://registry.yarnpkg.com/hashery/-/hashery-1.5.1.tgz#4ba82ad54911ac617467870845d57a9fe508a400"
-  integrity sha512-iZyKG96/JwPz1N55vj2Ie2vXbhu440zfUfJvSwEqEbeLluk7NnapfGqa7LH0mOsnDxTF85Mx8/dyR6HfqcbmbQ==
-  dependencies:
-    hookified "^1.15.0"
-
 hasown@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/hasown/-/hasown-2.0.2.tgz#003eaf91be7adc372e84ec59dc37252cedb80003"
@@ -1197,16 +1147,6 @@ hasown@^2.0.2:
   dependencies:
     function-bind "^1.1.2"
 
-hookified@^1.15.0, hookified@^1.15.1:
-  version "1.15.1"
-  resolved "https://registry.yarnpkg.com/hookified/-/hookified-1.15.1.tgz#b1fafeaa5489cdc29cb85546a8f837ed4ffbbcb6"
-  integrity sha512-MvG/clsADq1GPM2KGo2nyfaWVyn9naPiXrqIe4jYjXNZQt238kWyOGrsyc/DmRAQ+Re6yeo6yX/yoNCG5KAEVg==
-
-hookified@^2.1.1:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/hookified/-/hookified-2.2.0.tgz#1d024ac1668973dd5bcc4a96ab9ccdb7639ef8d4"
-  integrity sha512-p/LgFzRN5FeoD3DLS6bkUapeye6E4SI6yJs6KetENd18S+FBthqYq2amJUWpt5z0EQwwHemidjY5OqJGEKm5uA==
-
 ignore@^5.2.0:
   version "5.3.2"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-5.3.2.tgz#3cd40e729f3643fd87cb04e50bf0eb722bc596f5"
@@ -1445,13 +1385,18 @@ js-tiktoken@^1.0.12:
   dependencies:
     base64-js "^1.5.1"
 
-js-yaml@^4.3.2:
-  version "4.3.2"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.3.2.tgz#8e44fb14a2643c59726bb15787b5f1512cb3d3fb"
-  integrity sha512-SFNOvSJ+Dgf/9An904Yx+CgSlIPCkIpao4qo51lpee25TIRejdH3rhR4EZMGoNx3/TP3O+wzWuiTFl4sqbltzA==
+js-yaml@^4.3.0:
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.3.1.tgz#01216c001d67f48e2cd560d708c7af21090a3848"
+  integrity sha512-CY6crGq313MX8GkwvB7tzgp99vjQxY1++5y10/BKN/GUfHqWaOGQMNZkBvqSzsZKWk/ijwHlWzzkLulsGHhjWQ==
   dependencies:
     argparse "^2.0.1"
 
+json-buffer@3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/json-buffer/-/json-buffer-3.0.1.tgz#9338802a30d3b6605fbe0613e094008ca8c05a13"
+  integrity sha512-4bV5BfR2mqfQTJm+V5tPPdf+ZpuhiIvTuAB5g8kcrXOZpTT/QwwVRWBywX1ozr6lEuPdbHxwaJlm9G6mI2sfSQ==
+
 json-schema-traverse@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz#69f6a87d9513ab8bb8fe63bdb0979c448e684660"
@@ -1469,12 +1414,12 @@ json5@^1.0.2:
   dependencies:
     minimist "^1.2.0"
 
-keyv@^5.6.0:
-  version "5.6.0"
-  resolved "https://registry.yarnpkg.com/keyv/-/keyv-5.6.0.tgz#03044074c6b4d072d0a62c7b9fa649537baf0105"
-  integrity sha512-CYDD3SOtsHtyXeEORYRx2qBtpDJFjRTGXUtmNEMGyzYOKj1TE3tycdlho7kA1Ufx9OYWZzg52QFBGALTirzDSw==
+keyv@^4.5.4:
+  version "4.5.4"
+  resolved "https://registry.yarnpkg.com/keyv/-/keyv-4.5.4.tgz#a879a99e29452f942439f2a405e3af8b31d4de93"
+  integrity sha512-oxVHkHR/EJf2CNXnWxRLW6mg7JyCCUcG0DtEGmL2ctUo1PNTin1PUil+r/+4r5MpVgC/fn1kjsx7mjSujKqIpw==
   dependencies:
-    "@keyv/serialize" "^1.1.1"
+    json-buffer "3.0.1"
 
 "langsmith@>=0.5.0 <1.0.0":
   version "0.7.1"
@@ -1707,23 +1652,16 @@ prettier-linter-helpers@^1.0.1:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@^3.9.9:
-  version "3.9.9"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.9.tgz#09b826918c91cd4cbc80e0cbd1d2a922ff04f233"
-  integrity sha512-Z/CJHIkdujO/OtN7nXUii0Rf3VT5SRuhjBA82Xvu2XhBUgX3nhP67T0LHceBdQLex7OOFGTox+Q5Yg8Jk2Qivg==
+prettier@^3.9.6:
+  version "3.9.6"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.6.tgz#b3ea5146515d40fc53f18aa63f74dfab1e10dbf6"
+  integrity sha512-OpN0zzVdiaiAhxpuuj5efpIS4sY9j7bY6uR5mnj5yPzGkdkjNKSJeUThPb60Jw29QuAZgA4o+/iB49kFiaBX6g==
 
 punycode@^2.1.0:
   version "2.3.1"
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.3.1.tgz#027422e2faec0b25e1549c3e1bd8309b9133b6e5"
   integrity sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg==
 
-qified@^0.10.1:
-  version "0.10.1"
-  resolved "https://registry.yarnpkg.com/qified/-/qified-0.10.1.tgz#0640bf21bbe6ca540db290ad8f5fde4d870b8bda"
-  integrity sha512-+Owyggi9IxT1ePKGafcI87ubSmxol6smwJ+RAHDQlx9+9cPwFWDiKFFCPuWhr9ignlGpZ9vDQLw67N4dcTVFEA==
-  dependencies:
-    hookified "^2.1.1"
-
 reflect.getprototypeof@^1.0.6, reflect.getprototypeof@^1.0.9:
   version "1.0.10"
   resolved "https://registry.yarnpkg.com/reflect.getprototypeof/-/reflect.getprototypeof-1.0.10.tgz#c629219e78a3316d8b604c765ef68996964e7bf9"
@@ -1970,17 +1908,17 @@ tsconfig-paths@^3.15.0:
     minimist "^1.2.6"
     strip-bom "^3.0.0"
 
-turbo@^2.11.5:
-  version "2.11.5"
-  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.11.5.tgz#e7223abd0555b978d3efe1b00ea9a98f43afb7ab"
-  integrity sha512-qLXheqz3TUvJpHIV6MUBwkNkvwKxMVG/QsimyiKT9DfNWPHJ294G/i5nDaH+fbHJt3UH7orubNNxAqYkbUNGAQ==
+turbo@^2.10.8:
+  version "2.10.8"
+  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.10.8.tgz#09457cb7db79710586da455a29bccc05f15b1b72"
+  integrity sha512-9+8YX5QOkGXzZxcIykTHgaooRHGMWO+jfdyRK0o+rN0U7hBIig2MrJ8r/aNzIPDPhdA73SGb0O+tIztaModTMg==
   optionalDependencies:
-    "@turbo/darwin-64" "2.11.5"
-    "@turbo/darwin-arm64" "2.11.5"
-    "@turbo/linux-64" "2.11.5"
-    "@turbo/linux-arm64" "2.11.5"
-    "@turbo/windows-64" "2.11.5"
-    "@turbo/windows-arm64" "2.11.5"
+    "@turbo/darwin-64" "2.10.8"
+    "@turbo/darwin-arm64" "2.10.8"
+    "@turbo/linux-64" "2.10.8"
+    "@turbo/linux-arm64" "2.10.8"
+    "@turbo/windows-64" "2.10.8"
+    "@turbo/windows-arm64" "2.10.8"
 
 type-check@^0.4.0, type-check@~0.4.0:
   version "0.4.0"

libs/cli/langgraph_cli/__init__.py

@@ -1 +1 @@
-__version__ = "0.4.36"
+__version__ = "0.4.31"

libs/cli/langgraph_cli/config.py

@@ -6,7 +6,6 @@ import re
 import shlex
 import textwrap
 from collections import Counter
-from collections.abc import Iterable
 from typing import Literal, NamedTuple
 
 import click
@@ -37,10 +36,6 @@ DISALLOWED_BUILD_COMMAND_CHARS = [
 # This blocks background execution (cmd &) while allowing command
 # chaining (cmd1 && cmd2) which is common in build commands.
 _SINGLE_AMPERSAND_RE = re.compile(r"(?<!&)&(?:&&)*(?!&)")
-_GIT_HTTP_AUTHORITY_RES = (
-    re.compile(r"git\+https?://(?P<authority>[^/\s\"']+)", re.I),
-    re.compile(r"\bgit\s*=\s*[\"']https?://(?P<authority>[^/\s\"']+)", re.I),
-)
 _API_VERSION_PATTERN = re.compile(
     r"^(?P<major>\d+)"
     r"(?:\.(?P<minor>\d+))?"
@@ -83,62 +78,6 @@ def has_disallowed_build_command_content(command: str) -> bool:
     return False
 
 
-def _has_git_http_url_userinfo(dependency: str) -> bool:
-    """Check whether a Git HTTP URL contains userinfo."""
-    return any(
-        "@" in match.group("authority")
-        for pattern in _GIT_HTTP_AUTHORITY_RES
-        for match in pattern.finditer(dependency)
-    )
-
-
-def _validate_git_http_url_userinfo(
-    values: Iterable[str], *, source: pathlib.Path | None = None
-) -> None:
-    """Reject credential-bearing Git HTTP URLs without echoing their values."""
-    if not any(_has_git_http_url_userinfo(value) for value in values):
-        return
-    message = (
-        "Git dependency URLs must not contain credentials or other URL "
-        "userinfo because generated Dockerfiles and image layers can retain "
-        "them. Use a credential-free Git URL and provide short-lived "
-        "credentials through your build environment's secret-backed Git "
-        "credential helper."
-    )
-    if source is not None:
-        message += f" Found in: {source}"
-    raise click.UsageError(message)
-
-
-def _validate_git_http_url_userinfo_files(paths: Iterable[pathlib.Path]) -> None:
-    """Reject credential-bearing Git HTTP URLs in dependency files."""
-    for path in paths:
-        path = path.resolve()
-        if not path.is_file():
-            continue
-        try:
-            contents = path.read_text(encoding="utf-8", errors="replace")
-        except OSError:
-            raise click.UsageError(
-                f"Could not inspect dependency file for embedded credentials: {path}"
-            ) from None
-        _validate_git_http_url_userinfo([contents], source=path)
-
-
-def _validate_local_dependency_files(config_path: pathlib.Path, config: Config) -> None:
-    """Validate dependency files copied into a non-uv Python image."""
-    paths: list[pathlib.Path] = []
-    for dependency in config["dependencies"]:
-        if not isinstance(dependency, str) or not dependency.startswith("."):
-            continue
-        root = (config_path.parent / dependency).resolve()
-        paths.extend(
-            root / name
-            for name in ("requirements.txt", "pyproject.toml", "setup.py", "setup.cfg")
-        )
-    _validate_git_http_url_userinfo_files(paths)
-
-
 MIN_PYTHON_VERSION = "3.11"
 DEFAULT_PYTHON_VERSION = "3.11"
 
@@ -381,9 +320,7 @@ def _get_source_kind(config: Config) -> str | None:
     return kind if isinstance(kind, str) else None
 
 
-def validate_config(
-    config: Config, *, source_path: pathlib.Path | None = None
-) -> Config:
+def validate_config(config: Config) -> Config:
     """Validate a configuration dictionary."""
 
     graphs = config.get("graphs", {})
@@ -478,15 +415,6 @@ def validate_config(
                 '  "source": {"kind": "uv", "root": ".."}'
             )
 
-    _validate_git_http_url_userinfo(
-        (
-            dependency
-            for dependency in config["dependencies"]
-            if isinstance(dependency, str)
-        ),
-        source=source_path,
-    )
-
     source = config.get("source")
     source_kind = _get_source_kind(config)
     if source is not None and not isinstance(source, dict):
@@ -681,7 +609,7 @@ def validate_config_file(config_path: pathlib.Path) -> Config:
     """Load and validate a configuration file."""
     with open(config_path) as f:
         config = json.load(f)
-    validated = validate_config(config, source_path=config_path.resolve())
+    validated = validate_config(config)
     # Enforce the package.json doesn't enforce an
     # incompatible Node.js version
     if validated.get("node_version"):
@@ -1234,7 +1162,47 @@ def _build_runtime_env_vars(config: Config) -> list[str]:
     return env_vars
 
 
-def _get_node_pm_install_cmd(project_dir: pathlib.Path) -> str:
+# npm runs all of these as part of an install, before the source would be copied.
+_NODE_INSTALL_HOOKS = (
+    "preinstall",
+    "install",
+    "postinstall",
+    "prepublish",
+    "preprepare",
+    "prepare",
+    "postprepare",
+)
+
+
+def _splittable_node_manifests(
+    project_dir: pathlib.Path, lockfile: str | None
+) -> list[str] | None:
+    """Return manifests to copy before installing, or None if unsafe to split.
+
+    A lockfile is required: without one the install resolves versions at build
+    time, so a cached layer could pin an older resolution than a clean build.
+    """
+    if lockfile is None:
+        return None
+    manifest = project_dir / "package.json"
+    try:
+        if not manifest.is_file():
+            return None
+        with open(manifest) as f:
+            package_json = json.load(f)
+    except (OSError, ValueError):
+        return None
+    if not isinstance(package_json, dict):
+        return None
+    scripts = package_json.get("scripts") or {}
+    if any(hook in scripts for hook in _NODE_INSTALL_HOOKS):
+        return None
+    return ["package.json", lockfile]
+
+
+def _get_node_pm_install_cmd(project_dir: pathlib.Path) -> tuple[str, str | None]:
+    """Return the install command and the lockfile it was chosen from."""
+
     def test_file(file_name):
         full_path = project_dir / file_name
         try:
@@ -1273,13 +1241,19 @@ def _get_node_pm_install_cmd(project_dir: pathlib.Path) -> str:
 
     if yarn:
         install_cmd = "yarn install --frozen-lockfile"
+        lockfile = "yarn.lock"
     elif pnpm:
         install_cmd = "pnpm i --frozen-lockfile"
+        lockfile = "pnpm-lock.yaml"
     elif npm:
         install_cmd = "npm ci"
+        lockfile = "package-lock.json"
     elif bun:
         install_cmd = "bun i"
+        lockfile = "bun.lockb"
     else:
+        # No lockfile, so the install resolves versions at build time.
+        lockfile = None
         pkg_manager_name = get_pkg_manager_name()
 
         if pkg_manager_name == "yarn":
@@ -1291,7 +1265,7 @@ def _get_node_pm_install_cmd(project_dir: pathlib.Path) -> str:
         else:
             install_cmd = "npm i"
 
-    return install_cmd
+    return install_cmd, lockfile
 
 
 semver_pattern = re.compile(r":(\d+(?:\.\d+)?(?:\.\d+)?)(?:-|$)")
@@ -1352,7 +1326,6 @@ def python_config_to_docker(
             api_version=api_version,
             build_tools_to_uninstall=build_tools_to_uninstall,
         )
-    _validate_local_dependency_files(config_path, config)
     if pip_installer == "auto":
         if _image_supports_uv(base_image):
             pip_installer = "uv"
@@ -1496,7 +1469,7 @@ ADD {relpath} /deps/{name}
                 "# -- Installing JS dependencies --",
                 f"ENV NODE_VERSION={config.get('node_version') or DEFAULT_NODE_VERSION}",
                 f"WORKDIR {local_deps.working_dir}",
-                f"RUN {_get_node_pm_install_cmd(config_path.parent)} && tsx /api/langgraph_api/js/build.mts",
+                f"RUN {_get_node_pm_install_cmd(config_path.parent)[0]} && tsx /api/langgraph_api/js/build.mts",
                 "# -- End of JS dependencies install --",
             ]
         )
@@ -1563,20 +1536,11 @@ def node_config_to_docker(
 ) -> tuple[str, dict[str, str]]:
     # Calculate paths for monorepo support
     install_root = (
-        pathlib.Path(build_context).resolve()
-        if build_context
-        else config_path.parent.resolve()
+        pathlib.Path(build_context).resolve() if build_context else config_path.parent
     )
-    config_root = config_path.parent.resolve()
-    dependency_roots = (
-        (install_root, config_root) if install_root != config_root else (install_root,)
-    )
-    _validate_git_http_url_userinfo_files(
-        root / name
-        for root in dependency_roots
-        for name in ("package.json", "package-lock.json", "yarn.lock", "pnpm-lock.yaml")
-    )
-    install_cmd = install_command or _get_node_pm_install_cmd(install_root)
+    detected_cmd, detected_lockfile = _get_node_pm_install_cmd(install_root)
+    install_cmd = install_command or detected_cmd
+    relative_workdir = ""
     if build_context:
         relative_workdir = _calculate_relative_workdir(config_path, build_context)
         container_name = pathlib.Path(build_context).name
@@ -1614,16 +1578,41 @@ def node_config_to_docker(
     else:
         build_workdir = faux_path
 
+    source_root = faux_path if not build_context else container_root
+
+    # Excluded: a custom install command may read files we have not copied yet,
+    # and a nested config means workspace manifests the root copy would miss.
+    manifests = (
+        _splittable_node_manifests(install_root, detected_lockfile)
+        if install_command is None and not relative_workdir
+        else None
+    )
+
+    if manifests:
+        add_steps = [
+            *(f"ADD {name} {source_root}/{name}" for name in manifests),
+            "",
+            f"WORKDIR {install_workdir}",
+            "",
+            install_step,
+            "",
+            f"ADD . {source_root}",
+        ]
+    else:
+        add_steps = [
+            f"ADD . {source_root}",
+            "",
+            f"WORKDIR {install_workdir}",
+            "",
+            install_step,
+        ]
+
     docker_file_contents = [
         f"FROM {image_str}",
         "",
         os.linesep.join(config["dockerfile_lines"]),
         "",
-        f"ADD . {faux_path if not build_context else container_root}",
-        "",
-        f"WORKDIR {install_workdir}",
-        "",
-        install_step,
+        *add_steps,
         "",
         os.linesep.join(env_vars),
         "",

libs/cli/langgraph_cli/exec.py

@@ -1,18 +1,12 @@
 import asyncio
 import signal
 import sys
-from collections.abc import Callable, Coroutine
+from collections.abc import Callable
 from contextlib import contextmanager
-from typing import Any, Protocol, TypeVar, cast
+from typing import cast
 
 import click.exceptions
 
-_T = TypeVar("_T")
-
-
-class CommandRunner(Protocol):
-    def run(self, coro: Coroutine[Any, Any, _T]) -> _T: ...
-
 
 @contextmanager
 def Runner():

libs/cli/langgraph_cli/host_backend.py

@@ -2,125 +2,18 @@
 
 from __future__ import annotations
 
-from dataclasses import dataclass
-from typing import Any, Literal
-from urllib.parse import urlparse
+from typing import Any
 
 import click
 import httpx
 
-CLOUD_CONTROL_PLANE_URL = "https://api.host.langchain.com"
-CLOUD_DASHBOARD_URL = "https://smith.langchain.com"
-CLOUD_DOMAIN = "langchain.com"
-CLOUD_API_HOST = "api.smith.langchain.com"
-CLOUD_CONTROL_PLANE_HOST = "api.host.langchain.com"
-CLOUD_DASHBOARD_HOST = "smith.langchain.com"
-CONTROL_PLANE_PATH = "/api-host"
-LANGSMITH_API_PATHS = ("/api/v1", "/api")
-LOCAL_HOSTNAMES = ("localhost", "127.0.0.1")
-MAX_PAGE_SIZE = 100
-SourceName = Literal["internal_docker", "internal_source", "external_docker"]
-
-
-@dataclass(frozen=True, slots=True)
-class ControlPlaneEndpoints:
-    control_plane_url: str
-    dashboard_url: str
-
-    @classmethod
-    def resolve(
-        cls, host_url: str | None, langsmith_endpoint: str | None
-    ) -> ControlPlaneEndpoints:
-        if host_url:
-            return cls.from_control_plane_url(host_url)
-        if langsmith_endpoint:
-            return cls.from_langsmith_endpoint(langsmith_endpoint)
-        return cls(CLOUD_CONTROL_PLANE_URL, CLOUD_DASHBOARD_URL)
-
-    @property
-    def is_cloud(self) -> bool:
-        hostname = urlparse(self.control_plane_url).hostname or ""
-        return hostname == CLOUD_CONTROL_PLANE_HOST or hostname.endswith(
-            f".{CLOUD_CONTROL_PLANE_HOST}"
-        )
-
-    @classmethod
-    def from_control_plane_url(cls, url: str) -> ControlPlaneEndpoints:
-        control_plane_url = url.rstrip("/")
-        hostname = urlparse(control_plane_url).hostname or ""
-        if control_plane_url.endswith(CONTROL_PLANE_PATH):
-            return cls(control_plane_url, control_plane_url[: -len(CONTROL_PLANE_PATH)])
-        if hostname in LOCAL_HOSTNAMES:
-            return cls(control_plane_url, control_plane_url)
-        return cls(control_plane_url, _cloud_dashboard_for(hostname))
-
-    @classmethod
-    def from_langsmith_endpoint(cls, endpoint: str) -> ControlPlaneEndpoints:
-        parsed = urlparse(endpoint.rstrip("/"))
-        hostname = parsed.hostname or ""
-        if _is_cloud_host(hostname):
-            return cls.from_control_plane_url(
-                f"https://{_cloud_control_plane_host_for(hostname)}"
-            )
-        root = f"{parsed.scheme}://{parsed.netloc}{_without_api_path(parsed.path)}"
-        return cls(f"{root}{CONTROL_PLANE_PATH}", root)
-
-
-def _is_cloud_host(hostname: str) -> bool:
-    return hostname == CLOUD_DOMAIN or hostname.endswith(f".{CLOUD_DOMAIN}")
-
-
-def _cloud_control_plane_host_for(langsmith_api_host: str) -> str:
-    if langsmith_api_host.endswith(f".{CLOUD_API_HOST}"):
-        region = langsmith_api_host[: -len(CLOUD_API_HOST)]
-        return f"{region}{CLOUD_CONTROL_PLANE_HOST}"
-    return CLOUD_CONTROL_PLANE_HOST
-
-
-def _cloud_dashboard_for(control_plane_host: str) -> str:
-    if control_plane_host.endswith(f".{CLOUD_CONTROL_PLANE_HOST}"):
-        region = control_plane_host[: -len(CLOUD_CONTROL_PLANE_HOST) - 1]
-        return f"https://{region}.{CLOUD_DASHBOARD_HOST}"
-    return CLOUD_DASHBOARD_URL
-
-
-def _without_api_path(path: str) -> str:
-    for api_path in LANGSMITH_API_PATHS:
-        if path.endswith(api_path):
-            return path[: -len(api_path)]
-    return path
-
-
-def _resources(payload: object) -> list[dict[str, Any]]:
-    if not isinstance(payload, dict):
-        return []
-    resources = payload.get("resources")
-    if not isinstance(resources, list):
-        return []
-    return [item for item in resources if isinstance(item, dict)]
-
 
 class HostBackendError(click.ClickException):
     """Raised when the host backend returns an error response."""
 
-    def __init__(
-        self,
-        message: str,
-        status_code: int | None = None,
-        detail: str | None = None,
-    ):
+    def __init__(self, message: str, status_code: int | None = None):
         super().__init__(message)
         self.status_code = status_code
-        self.detail = detail
-
-
-def _error_detail(response: httpx.Response) -> str | None:
-    try:
-        body = response.json()
-    except ValueError:
-        return None
-    detail = body.get("detail") if isinstance(body, dict) else None
-    return detail if isinstance(detail, str) else None
 
 
 class HostBackendClient:
@@ -131,37 +24,24 @@ class HostBackendClient:
         base_url: str,
         api_key: str,
         tenant_id: str | None = None,
-        *,
-        transport: httpx.BaseTransport | None = None,
     ):
         if not base_url:
             raise click.UsageError("Host backend URL is required")
+        transport = httpx.HTTPTransport(retries=3)
         headers: dict[str, str] = {
             "X-Api-Key": api_key,
             "Accept": "application/json",
         }
         if tenant_id:
             headers["X-Tenant-ID"] = tenant_id
-        self._endpoints = ControlPlaneEndpoints.from_control_plane_url(base_url)
-        self._base_url = self._endpoints.control_plane_url
+        self._base_url = base_url.rstrip("/")
         self._client = httpx.Client(
             base_url=self._base_url,
             headers=headers,
-            transport=transport or httpx.HTTPTransport(retries=3),
+            transport=transport,
             timeout=30,
         )
 
-    @property
-    def base_url(self) -> str:
-        return self._base_url
-
-    @property
-    def endpoints(self) -> ControlPlaneEndpoints:
-        return self._endpoints
-
-    def set_tenant(self, tenant_id: str) -> None:
-        self._client.headers["X-Tenant-ID"] = tenant_id
-
     def _request(
         self,
         method: str,
@@ -173,12 +53,10 @@ class HostBackendClient:
             resp = self._client.request(method, path, json=payload, params=params)
             resp.raise_for_status()
         except httpx.HTTPStatusError as err:
-            detail = _error_detail(err.response)
-            reason = detail or err.response.text or str(err.response.status_code)
+            detail = err.response.text or str(err.response.status_code)
             raise HostBackendError(
-                f"{method} {path} failed with status {err.response.status_code}: {reason}",
+                f"{method} {path} failed with status {err.response.status_code}: {detail}",
                 status_code=err.response.status_code,
-                detail=detail,
             ) from None
         except httpx.TransportError as err:
             raise HostBackendError(str(err)) from None
@@ -194,52 +72,30 @@ class HostBackendClient:
 
     def create_deployment(
         self,
-        *,
-        name: str | None,
-        source: SourceName,
-        source_config: dict[str, object],
-        source_revision_config: dict[str, object],
+        name: str,
+        deployment_type: str,
+        source: str,
+        config_path: str | None = None,
         secrets: list[dict[str, str]] | None = None,
-        agent: dict[str, str] | None = None,
     ) -> dict[str, Any]:
+        """Create a deployment."""
         payload: dict[str, Any] = {
+            "name": name,
             "source": source,
-            "source_config": source_config,
-            "source_revision_config": source_revision_config,
+            "source_config": {"deployment_type": deployment_type},
+            "source_revision_config": {},
         }
-        if agent is not None:
-            payload["agent"] = agent
-        else:
-            payload["name"] = name
+        if source == "internal_source" and config_path:
+            payload["source_revision_config"]["langgraph_config_path"] = config_path
         if secrets is not None:
             payload["secrets"] = secrets
         return self._request("POST", "/v2/deployments", payload)
 
-    def list_deployments(
-        self,
-        *,
-        name: str | None = None,
-        name_contains: str | None = None,
-        limit: int | None = None,
-        agent_id: str | None = None,
-        agent_environment: str | None = None,
-    ) -> list[dict[str, Any]]:
-        given = (
-            ("name", name),
-            ("name_contains", name_contains),
-            ("limit", limit),
-            ("agent_id", agent_id),
-            ("agent_environment", agent_environment),
-        )
-        params = {key: value for key, value in given if value is not None}
-        return _resources(self._request("GET", "/v2/deployments", params=params))
-
-    def get_listener(self, listener_id: str) -> dict[str, Any]:
-        return self._request("GET", f"/v2/listeners/{listener_id}")
-
-    def list_listeners(self) -> list[dict[str, Any]]:
-        return _resources(
-            self._request("GET", "/v2/listeners", params={"limit": MAX_PAGE_SIZE})
+    def list_deployments(self, name_contains: str = "") -> dict[str, Any]:
+        return self._request(
+            "GET",
+            "/v2/deployments",
+            params={"name_contains": name_contains},
         )
 
     def get_deployment(self, deployment_id: str) -> dict[str, Any]:
@@ -249,12 +105,9 @@ class HostBackendClient:
         return self._request("DELETE", f"/v2/deployments/{deployment_id}")
 
     def request_push_token(self, deployment_id: str) -> dict[str, Any]:
-        # Tells the control plane this client logs in with the returned
-        # `username` and pushes to `repository_url`. LangSmith AWS requires it.
         return self._request(
             "POST",
             f"/v2/deployments/{deployment_id}/push-token",
-            {"supports_registry_username": True},
         )
 
     def request_upload_url(self, deployment_id: str) -> dict[str, Any]:
@@ -268,21 +121,22 @@ class HostBackendClient:
         self,
         deployment_id: str,
         image_uri: str,
-        *,
-        revision_source: SourceName | None,
         secrets: list[dict[str, str]] | None = None,
         tracked_packages: list[str] | None = None,
     ) -> dict[str, Any]:
         payload: dict[str, Any] = {
+            "revision_source": "internal_docker",
             "source_revision_config": {"image_uri": image_uri},
         }
-        if revision_source is not None:
-            payload["revision_source"] = revision_source
         if tracked_packages:
             payload["tracked_packages"] = tracked_packages
         if secrets is not None:
             payload["secrets"] = secrets
-        return self._request("PATCH", f"/v2/deployments/{deployment_id}", payload)
+        return self._request(
+            "PATCH",
+            f"/v2/deployments/{deployment_id}",
+            payload,
+        )
 
     def update_deployment_internal_source(
         self,
@@ -317,15 +171,10 @@ class HostBackendClient:
             payload["secrets"] = secrets
         return self._request("PATCH", f"/v2/deployments/{deployment_id}", payload)
 
-    def list_revisions(
-        self, deployment_id: str, limit: int = 1
-    ) -> list[dict[str, Any]]:
-        return _resources(
-            self._request(
-                "GET",
-                f"/v2/deployments/{deployment_id}/revisions",
-                params={"limit": limit},
-            )
+    def list_revisions(self, deployment_id: str, limit: int = 1) -> dict[str, Any]:
+        return self._request(
+            "GET",
+            f"/v2/deployments/{deployment_id}/revisions?limit={limit}",
         )
 
     def get_revision(self, deployment_id: str, revision_id: str) -> dict[str, Any]:

libs/cli/langgraph_cli/image_reference.py

@@ -1,35 +0,0 @@
-from __future__ import annotations
-
-from dataclasses import dataclass, replace
-
-DIGEST_SEPARATOR = "@sha256:"
-DIGEST_MARKER = "@"
-TAG_SEPARATOR = ":"
-PATH_SEPARATOR = "/"
-
-
-@dataclass(frozen=True, slots=True)
-class ImageReference:
-    repository: str
-    tag: str | None = None
-
-    @classmethod
-    def parse(cls, reference: str) -> ImageReference:
-        if DIGEST_MARKER in reference:
-            raise ValueError(f"{reference!r} carries a digest and cannot be tagged")
-        path_start = reference.rfind(PATH_SEPARATOR) + 1
-        name, separator, tag = reference[path_start:].partition(TAG_SEPARATOR)
-        if not separator:
-            return cls(reference)
-        return cls(reference[:path_start] + name, tag)
-
-    def with_tag(self, tag: str) -> ImageReference:
-        return replace(self, tag=tag)
-
-    def matches_digest(self, repo_digest: str) -> bool:
-        return repo_digest.startswith(f"{self.repository}{DIGEST_SEPARATOR}")
-
-    def __str__(self) -> str:
-        if self.tag is None:
-            return self.repository
-        return f"{self.repository}{TAG_SEPARATOR}{self.tag}"

libs/cli/langgraph_cli/schemas.py

@@ -650,8 +650,7 @@ class Config(TypedDict, total=False):
 
     pip_config_file: str | None
     """Optional. Path to a pip config file (e.g., "/etc/pip.conf" or "pip.ini") for controlling
-    package installation (custom indices, timeouts, etc.). The file is copied into the
-    generated image, so it must not contain credentials or other secrets.
+    package installation (custom indices, credentials, etc.).
 
     Only relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.
     """
@@ -690,9 +689,6 @@ class Config(TypedDict, total=False):
       - "." or "./src" if you have a local Python package
       - str (aka "anthropic") for a PyPI package
       - "git+https://github.com/org/repo.git@main" for a Git-based package
-    Git HTTP URLs must not contain userinfo such as a username or token. For private
-    dependencies, provide short-lived credentials through the build environment's
-    secret-backed Git credential helper.
     Defaults to an empty list, meaning no additional packages installed beyond your base environment.
 
     This field is not supported when `source.kind` is `uv`.

libs/cli/langgraph_cli/uv_lock.py

@@ -880,7 +880,6 @@ def python_config_to_docker_uv_lock(
         _get_node_pm_install_cmd,
         _get_pip_cleanup_lines,
         _image_supports_uv,
-        _validate_git_http_url_userinfo_files,
         docker_tag,
     )
 
@@ -891,20 +890,11 @@ def python_config_to_docker_uv_lock(
         )
 
     config_root = config_path.parent.resolve()
-    source_root = config["source"].get("root", ".")
-    project_root = (config_root / source_root).resolve()
-    _validate_git_http_url_userinfo_files(
-        [project_root / "pyproject.toml", project_root / "uv.lock"]
-    )
-
     install_cmd = "uv pip install --system"
     _, global_reqs_pip_install, pip_config_file_str = _build_python_install_commands(
         config, install_cmd
     )
     plan = _plan_uv_lock_workspace(config_path, config)
-    _validate_git_http_url_userinfo_files(
-        package.pyproject_path for package in plan.install_order
-    )
 
     _update_uv_lock_graph_paths(config_path, config, plan)
     for section, key in [
@@ -980,22 +970,6 @@ def python_config_to_docker_uv_lock(
             f"{uv_export_project_dir}/uv.lock",
         )
     )
-    for package_root in sorted(
-        plan.all_workspace_roots,
-        key=lambda root: root.as_posix(),
-    ):
-        if package_root == plan.project_root:
-            continue
-        package_relative_path = pathlib.PurePosixPath(
-            package_root.relative_to(plan.project_root).as_posix()
-        )
-        package_pyproject_path = package_relative_path / "pyproject.toml"
-        docker_plan.add_raw(
-            copy_from_project_root(
-                package_pyproject_path,
-                f"{uv_export_project_dir}/{package_pyproject_path.as_posix()}",
-            )
-        )
     docker_plan.add_instruction("WORKDIR", uv_export_project_dir)
     docker_plan.add_instruction(
         "RUN",
@@ -1045,7 +1019,7 @@ def python_config_to_docker_uv_lock(
         docker_plan.add_instruction("WORKDIR", plan.working_dir)
         docker_plan.add_instruction(
             "RUN",
-            f"{_get_node_pm_install_cmd(plan.target_root)} && "
+            f"{_get_node_pm_install_cmd(plan.target_root)[0]} && "
             "tsx /api/langgraph_api/js/build.mts",
         )
         docker_plan.add_raw("# -- End of JS dependencies install --")

libs/cli/schemas/schema.json

@@ -28,7 +28,7 @@
                   "type": "null"
                 }
               ],
-              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, timeouts, etc.). The file is copied into the\ngenerated image, so it must not contain credentials or other secrets.\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
+              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, credentials, etc.).\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
             },
             "_INTERNAL_docker_tag": {
               "anyOf": [
@@ -270,7 +270,7 @@
                   "type": "null"
                 }
               ],
-              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, timeouts, etc.). The file is copied into the\ngenerated image, so it must not contain credentials or other secrets.\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
+              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, credentials, etc.).\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
             },
             "_INTERNAL_docker_tag": {
               "anyOf": [

libs/cli/schemas/schema.v0.json

@@ -28,7 +28,7 @@
                   "type": "null"
                 }
               ],
-              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, timeouts, etc.). The file is copied into the\ngenerated image, so it must not contain credentials or other secrets.\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
+              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, credentials, etc.).\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
             },
             "_INTERNAL_docker_tag": {
               "anyOf": [
@@ -270,7 +270,7 @@
                   "type": "null"
                 }
               ],
-              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, timeouts, etc.). The file is copied into the\ngenerated image, so it must not contain credentials or other secrets.\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
+              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, credentials, etc.).\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
             },
             "_INTERNAL_docker_tag": {
               "anyOf": [

libs/cli/tests/unit_tests/cli/test_cli.py

@@ -14,7 +14,6 @@ import langgraph_cli.deploy as deploy_module
 from langgraph_cli.cli import cli, prepare_args_and_stdin
 from langgraph_cli.config import Config, _get_pip_cleanup_lines, validate_config
 from langgraph_cli.docker import DEFAULT_POSTGRES_URI, DockerCapabilities, Version
-from langgraph_cli.host_backend import HostBackendError
 from langgraph_cli.util import clean_empty_lines
 
 FORMATTED_CLEANUP_LINES = _get_pip_cleanup_lines(
@@ -321,31 +320,6 @@ def test_top_level_help_truncates_command_descriptions_to_single_line() -> None:
     assert "[Beta] List LangSmith Deployments." in deploy_list_line
 
 
-def test_deploy_missing_config_shows_actionable_error(tmp_path, monkeypatch) -> None:
-    runner = CliRunner()
-    monkeypatch.chdir(tmp_path)
-
-    result = runner.invoke(cli, ["deploy"])
-
-    assert result.exit_code == 1
-    assert "We couldn't find a langgraph.json file." in result.output
-    assert "Run `langgraph deploy` from the root" in result.output
-    assert "https://docs.langchain.com/langsmith/deployment-quickstart" in result.output
-    assert "Traceback" not in result.output
-
-
-def test_deploy_missing_config_emits_json_error(tmp_path, monkeypatch) -> None:
-    runner = CliRunner()
-    monkeypatch.chdir(tmp_path)
-
-    result = runner.invoke(cli, ["deploy", "--json"])
-
-    assert result.exit_code == 1
-    events = [json.loads(line) for line in result.output.splitlines()]
-    assert events[-1]["event"] == "error"
-    assert "We couldn't find a langgraph.json file." in events[-1]["message"]
-
-
 def test_dev_command_requires_ssl_certfile_and_keyfile_together(tmp_path) -> None:
     config_path = tmp_path / "langgraph.json"
     config_path.write_text(
@@ -383,18 +357,20 @@ def test_deploy_list_command(monkeypatch) -> None:
 
         def list_deployments(self, name_contains: str = ""):
             captured["name_contains"] = name_contains
-            return [
-                {
-                    "id": "dep-123",
-                    "name": "alpha",
-                    "source_config": {"custom_url": "https://alpha.example.com"},
-                },
-                {
-                    "id": "dep-456",
-                    "name": "beta",
-                    "source_config": {"custom_url": "https://beta.example.com"},
-                },
-            ]
+            return {
+                "resources": [
+                    {
+                        "id": "dep-123",
+                        "name": "alpha",
+                        "source_config": {"custom_url": "https://alpha.example.com"},
+                    },
+                    {
+                        "id": "dep-456",
+                        "name": "beta",
+                        "source_config": {"custom_url": "https://beta.example.com"},
+                    },
+                ]
+            }
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 
@@ -434,7 +410,7 @@ def test_deploy_list_command_no_results(monkeypatch) -> None:
             pass
 
         def list_deployments(self, name_contains: str = ""):
-            return []
+            return {"resources": []}
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 
@@ -454,203 +430,6 @@ def test_deploy_list_command_no_results(monkeypatch) -> None:
     assert result.output.strip() == "No deployments found."
 
 
-def test_deploy_listeners_list_command(monkeypatch) -> None:
-    runner = CliRunner()
-    captured: dict[str, str] = {}
-
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            captured["host_url"] = host_url
-            captured["api_key"] = api_key
-            captured["tenant_id"] = tenant_id or ""
-
-        def list_listeners(self):
-            return [
-                {
-                    "id": "listener-1",
-                    "compute_id": "prod-cluster",
-                    "compute_config": {"k8s_namespaces": ["agents"]},
-                },
-                {
-                    "id": "listener-2",
-                    "compute_id": "multi-cluster",
-                    "compute_config": {"k8s_namespaces": ["agents", "agents-staging"]},
-                },
-            ]
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = runner.invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert captured == {
-        "host_url": "https://api.example.com",
-        "api_key": "test-key",
-        "tenant_id": "",
-    }
-    assert "Listener ID" in result.output
-    assert "Compute ID" in result.output
-    assert "Namespaces" in result.output
-    assert "listener-1" in result.output
-    assert "prod-cluster" in result.output
-    assert "agents, agents-staging" in result.output
-
-
-def test_deploy_listeners_list_command_no_results(monkeypatch) -> None:
-    runner = CliRunner()
-
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            return []
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = runner.invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert result.output.strip() == "No listeners found for this workspace."
-
-
-def test_deploy_listeners_list_command_json(monkeypatch) -> None:
-    runner = CliRunner()
-
-    listeners = [
-        {
-            "id": "listener-1",
-            "compute_id": "prod-cluster",
-            "compute_config": {"k8s_namespaces": ["agents"]},
-        },
-        {
-            "id": "listener-2",
-            "compute_id": "multi-cluster",
-            "compute_config": {"k8s_namespaces": ["agents", "agents-staging"]},
-        },
-    ]
-
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            return listeners
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = runner.invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--json",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert json.loads(result.output) == listeners
-
-
-def test_deploy_listeners_list_command_json_no_results(monkeypatch) -> None:
-    runner = CliRunner()
-
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            return []
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    result = runner.invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--json",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert result.exit_code == 0, result.output
-    assert json.loads(result.output) == []
-
-
-def test_deploy_listeners_list_command_json_org_scoped_403(monkeypatch) -> None:
-    """With --json, an org-scoped 403 must raise cleanly instead of
-    prompting for a workspace ID, which would write to stdout and hang
-    waiting for input that a scripted invocation never provides."""
-    runner = CliRunner()
-
-    class FakeClient:
-        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
-            pass
-
-        def list_listeners(self):
-            raise HostBackendError("requires workspace specification", status_code=403)
-
-        def set_tenant(self, tenant_id: str) -> None:
-            raise AssertionError("must not retry with a prompted tenant with --json")
-
-    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
-
-    prompt_calls = []
-    monkeypatch.setattr(
-        click, "prompt", lambda *a, **k: prompt_calls.append((a, k)) or "unreachable"
-    )
-
-    result = runner.invoke(
-        cli,
-        [
-            "deploy",
-            "listeners",
-            "list",
-            "--json",
-            "--api-key",
-            "test-key",
-            "--host-url",
-            "https://api.example.com",
-        ],
-    )
-
-    assert prompt_calls == [], "must not prompt interactively with --json"
-    assert result.exit_code != 0
-    assert "LANGSMITH_TENANT_ID" in result.output
-
-
 def test_deploy_revisions_list_command(monkeypatch) -> None:
     runner = CliRunner()
     captured: dict[str, str] = {}
@@ -664,18 +443,20 @@ def test_deploy_revisions_list_command(monkeypatch) -> None:
         def list_revisions(self, deployment_id: str, limit: int = 1):
             captured["deployment_id"] = deployment_id
             captured["limit"] = str(limit)
-            return [
-                {
-                    "id": "rev-123",
-                    "status": "CREATING",
-                    "created_at": "2023-11-07T05:31:56Z",
-                },
-                {
-                    "id": "rev-456",
-                    "status": "DEPLOYED",
-                    "created_at": "2023-11-08T10:00:00Z",
-                },
-            ]
+            return {
+                "resources": [
+                    {
+                        "id": "rev-123",
+                        "status": "CREATING",
+                        "created_at": "2023-11-07T05:31:56Z",
+                    },
+                    {
+                        "id": "rev-456",
+                        "status": "DEPLOYED",
+                        "created_at": "2023-11-08T10:00:00Z",
+                    },
+                ]
+            }
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 
@@ -716,7 +497,7 @@ def test_deploy_revisions_list_command_no_results(monkeypatch) -> None:
             pass
 
         def list_revisions(self, deployment_id: str, limit: int = 1):
-            return []
+            return {"resources": []}
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 
@@ -749,7 +530,7 @@ def test_deploy_revisions_list_command_with_explicit_limit(monkeypatch) -> None:
         def list_revisions(self, deployment_id: str, limit: int = 1):
             captured["deployment_id"] = deployment_id
             captured["limit"] = str(limit)
-            return []
+            return {"resources": []}
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 

libs/cli/tests/unit_tests/conftest.py

@@ -12,5 +12,5 @@ def disable_analytics_env() -> None:
     if "LANGGRAPH_CLI_NO_ANALYTICS" in os.environ:
         print("⚠️ LANGGRAPH_CLI_NO_ANALYTICS is set. Overriding it for the test.")
 
-    with patch.dict(os.environ, {"LANGGRAPH_CLI_NO_ANALYTICS": "1"}):
+    with patch.dict(os.environ, {"LANGGRAPH_CLI_NO_ANALYTICS": "0"}):
         yield

libs/cli/tests/unit_tests/test_config.py

@@ -255,243 +255,6 @@ def test_validate_config():
         )
 
 
-@pytest.mark.parametrize(
-    "dependency",
-    [
-        "git+https://user:secret-token@github.com/org/private.git@main",
-        "private-package @ git+http://token@github.com/org/private.git",
-        "git+HTTPS://user%40example.com:secret%2Ftoken@github.com/org/private.git",
-        "git+https://${GIT_TOKEN}@github.com/org/private.git",
-    ],
-)
-def test_validate_config_rejects_git_http_url_userinfo(dependency: str):
-    with pytest.raises(click.UsageError) as exc_info:
-        validate_config(
-            {
-                "python_version": "3.11",
-                "dependencies": [dependency],
-                "graphs": {"agent": "./agent.py:graph"},
-            }
-        )
-
-    message = str(exc_info.value)
-    assert "must not contain credentials or other URL userinfo" in message
-    assert "secret-token" not in message
-    assert "secret%2Ftoken" not in message
-
-
-def test_validate_config_file_reports_source_for_git_http_url_userinfo(
-    tmp_path: pathlib.Path,
-):
-    config_path = tmp_path / "langgraph.json"
-    config_path.write_text(
-        json.dumps(
-            {
-                "python_version": "3.11",
-                "dependencies": ["git+https://secret-token@github.com/org/private.git"],
-                "graphs": {"agent": "./agent.py:graph"},
-            }
-        )
-    )
-
-    with pytest.raises(click.UsageError) as exc_info:
-        validate_config_file(config_path)
-
-    message = str(exc_info.value)
-    assert "secret-token" not in message
-    assert f"Found in: {config_path.resolve()}" in message
-
-
-@pytest.mark.parametrize(
-    "manifest", ["package.json", "package-lock.json", "yarn.lock", "pnpm-lock.yaml"]
-)
-def test_config_to_docker_rejects_git_http_url_userinfo_in_node_files(
-    tmp_path: pathlib.Path, manifest: str
-):
-    config_path = tmp_path / "langgraph.json"
-    config_path.write_text("{}\n")
-    (tmp_path / "agent.js").write_text("export const graph = {};\n")
-    (tmp_path / "package.json").write_text('{"name":"agent"}\n')
-    (tmp_path / manifest).write_text(
-        '"priv": "git+https://user:secret-token@github.com/org/private.git"\n'
-    )
-    config = validate_config(
-        {
-            "node_version": "20",
-            "graphs": {"agent": "./agent.js:graph"},
-        }
-    )
-
-    with pytest.raises(click.UsageError) as exc_info:
-        config_to_docker(
-            config_path,
-            config,
-            base_image="langchain/langgraphjs-api",
-        )
-
-    message = str(exc_info.value)
-    assert "must not contain credentials or other URL userinfo" in message
-    assert "secret-token" not in message
-    assert f"Found in: {(tmp_path / manifest).resolve()}" in message
-
-
-def test_config_to_docker_allows_node_git_urls_without_http_userinfo(
-    tmp_path: pathlib.Path,
-):
-    config_path = tmp_path / "langgraph.json"
-    config_path.write_text("{}\n")
-    (tmp_path / "agent.js").write_text("export const graph = {};\n")
-    (tmp_path / "package.json").write_text(
-        '{"dependencies":{"public":"git+https://github.com/org/public.git"}}\n'
-    )
-    config = validate_config(
-        {
-            "node_version": "20",
-            "graphs": {"agent": "./agent.js:graph"},
-        }
-    )
-
-    docker, _ = config_to_docker(
-        config_path,
-        config,
-        base_image="langchain/langgraphjs-api",
-    )
-
-    assert f"ADD . /deps/{tmp_path.name}" in docker
-
-
-def test_config_to_docker_rejects_git_http_url_userinfo_in_node_workspace(
-    tmp_path: pathlib.Path,
-):
-    config_root = tmp_path / "apps" / "agent"
-    config_root.mkdir(parents=True)
-    config_path = config_root / "langgraph.json"
-    config_path.write_text("{}\n")
-    (config_root / "agent.js").write_text("export const graph = {};\n")
-    (config_root / "package.json").write_text(
-        '{"dependencies":{"priv":"git+https://secret-token@github.com/org/private.git"}}\n'
-    )
-    (tmp_path / "package.json").write_text('{"name":"workspace"}\n')
-    config = validate_config(
-        {
-            "node_version": "20",
-            "graphs": {"agent": "./agent.js:graph"},
-        }
-    )
-
-    with pytest.raises(click.UsageError) as exc_info:
-        config_to_docker(
-            config_path,
-            config,
-            base_image="langchain/langgraphjs-api",
-            build_context=str(tmp_path),
-        )
-
-    message = str(exc_info.value)
-    assert "secret-token" not in message
-    assert f"Found in: {(config_root / 'package.json').resolve()}" in message
-
-
-@pytest.mark.parametrize(
-    "dependency",
-    [
-        "git+https://github.com/org/public.git@main",
-        "private-package @ git+https://github.com/org/private.git@main",
-        "git+ssh://git@github.com/org/private.git@main",
-    ],
-)
-def test_validate_config_allows_git_urls_without_http_userinfo(dependency: str):
-    config = validate_config(
-        {
-            "python_version": "3.11",
-            "dependencies": [dependency],
-            "graphs": {"agent": "./agent.py:graph"},
-        }
-    )
-
-    assert config["dependencies"] == [dependency]
-
-
-def test_config_to_docker_rejects_git_http_url_userinfo_in_requirements(
-    tmp_path: pathlib.Path,
-):
-    config_path = tmp_path / "langgraph.json"
-    config_path.write_text("{}\n")
-    (tmp_path / "agent.py").write_text("graph = object()\n")
-    (tmp_path / "requirements.txt").write_text(
-        "private @ git+https://secret-token@github.com/org/private.git\n"
-    )
-    config = validate_config(
-        {
-            "python_version": "3.11",
-            "dependencies": ["."],
-            "graphs": {"agent": "./agent.py:graph"},
-        }
-    )
-
-    with pytest.raises(click.UsageError) as exc_info:
-        config_to_docker(
-            config_path,
-            config,
-            base_image="langchain/langgraph-api:0.2.47",
-        )
-
-    message = str(exc_info.value)
-    assert "must not contain credentials or other URL userinfo" in message
-    assert "secret-token" not in message
-    assert f"Found in: {(tmp_path / 'requirements.txt').resolve()}" in message
-
-
-@pytest.mark.parametrize("manifest", ["pyproject.toml", "uv.lock"])
-def test_config_to_docker_rejects_git_http_url_userinfo_in_uv_files(
-    tmp_path: pathlib.Path, manifest: str
-):
-    config_path = tmp_path / "langgraph.json"
-    config_path.write_text("{}\n")
-    (tmp_path / "src").mkdir()
-    (tmp_path / "src" / "agent.py").write_text("graph = object()\n")
-    pyproject = textwrap.dedent(
-        """
-        [project]
-        name = "agent"
-        version = "0.1.0"
-        dependencies = ["private"]
-
-        [tool.uv.sources]
-        private = { git = "https://github.com/org/private.git" }
-        """
-    ).strip()
-    uv_lock = "# uv lock file\n"
-    if manifest == "pyproject.toml":
-        pyproject = pyproject.replace(
-            "https://github.com", "https://secret-token@github.com"
-        )
-    else:
-        uv_lock += (
-            'source = { git = "https://secret-token@github.com/org/private.git" }\n'
-        )
-    (tmp_path / "pyproject.toml").write_text(pyproject + "\n")
-    (tmp_path / "uv.lock").write_text(uv_lock)
-    config = validate_config(
-        {
-            "python_version": "3.11",
-            "graphs": {"agent": "./src/agent.py:graph"},
-            "source": {"kind": "uv"},
-        }
-    )
-
-    with pytest.raises(click.UsageError) as exc_info:
-        config_to_docker(
-            config_path,
-            config,
-            base_image="langchain/langgraph-api:0.2.47",
-        )
-
-    message = str(exc_info.value)
-    assert "must not contain credentials or other URL userinfo" in message
-    assert "secret-token" not in message
-
-
 def test_validate_config_image_distro():
     """Test validation of image_distro field."""
     # Valid image_distro values should work
@@ -1640,19 +1403,6 @@ def test_config_to_docker_uv_lock():
             "COPY --from=uv-workspace-root uv.lock /tmp/uv_export/project/uv.lock"
             in docker
         )
-        workspace_pyprojects = [
-            "apps/agent/pyproject.toml",
-            "libs/extra/pyproject.toml",
-            "libs/shared/pyproject.toml",
-        ]
-        export_instruction = "RUN uv export --package agent"
-        for pyproject_path in workspace_pyprojects:
-            copy_instruction = (
-                "COPY --from=uv-workspace-root "
-                f"{pyproject_path} /tmp/uv_export/project/{pyproject_path}"
-            )
-            assert copy_instruction in docker
-            assert docker.index(copy_instruction) < docker.index(export_instruction)
         assert additional_contexts == {"uv-workspace-root": str(project_root.resolve())}
 
         assert (
@@ -3674,3 +3424,143 @@ class TestHasDisallowedBuildCommandContent:
     )
     def test_valid_commands_allowed(self, cmd: str) -> None:
         assert not has_disallowed_build_command_content(cmd)
+
+
+class TestNodeDependencyLayerOrdering:
+    """Dependency manifests are copied before source so the install layer caches.
+
+    Without this the first source change invalidates the install, and a JS
+    deployment reinstalls every dependency on every push.
+    """
+
+    def _project(
+        self,
+        tmp_path: pathlib.Path,
+        *,
+        lockfile: str | None,
+        scripts: dict[str, str] | None = None,
+    ) -> pathlib.Path:
+        package_json: dict = {"name": "agent"}
+        if scripts:
+            package_json["scripts"] = scripts
+        (tmp_path / "package.json").write_text(json.dumps(package_json))
+        if lockfile:
+            (tmp_path / lockfile).write_text("")
+        (tmp_path / "graphs").mkdir()
+        (tmp_path / "graphs" / "agent.js").write_text("")
+        config_path = tmp_path / "langgraph.json"
+        config_path.write_text("{}")
+        return config_path
+
+    def _dockerfile(self, config_path: pathlib.Path, **kwargs) -> str:
+        actual, _ = config_to_docker(
+            config_path,
+            validate_config(
+                {"node_version": "20", "graphs": {"agent": "./graphs/agent.js:graph"}}
+            ),
+            base_image="langchain/langgraphjs-api",
+            **kwargs,
+        )
+        return clean_empty_lines(actual)
+
+    def test_manifests_copied_before_install(self, tmp_path: pathlib.Path) -> None:
+        config_path = self._project(tmp_path, lockfile="package-lock.json")
+        lines = self._dockerfile(config_path).splitlines()
+
+        add_manifest = lines.index(
+            f"ADD package.json /deps/{tmp_path.name}/package.json"
+        )
+        add_lock = lines.index(
+            f"ADD package-lock.json /deps/{tmp_path.name}/package-lock.json"
+        )
+        install = lines.index("RUN npm ci")
+        add_source = lines.index(f"ADD . /deps/{tmp_path.name}")
+
+        assert add_manifest < install
+        assert add_lock < install
+        assert install < add_source
+
+    def test_lockfile_choice_follows_package_manager(
+        self, tmp_path: pathlib.Path
+    ) -> None:
+        config_path = self._project(tmp_path, lockfile="pnpm-lock.yaml")
+        dockerfile = self._dockerfile(config_path)
+
+        assert f"ADD pnpm-lock.yaml /deps/{tmp_path.name}/pnpm-lock.yaml" in dockerfile
+        assert "package-lock.json" not in dockerfile
+
+    def test_no_lockfile_keeps_source_first(self, tmp_path: pathlib.Path) -> None:
+        # No lockfile means the install resolves at build time, so caching it is wrong.
+        config_path = self._project(tmp_path, lockfile=None)
+        lines = self._dockerfile(config_path).splitlines()
+
+        assert lines.index(f"ADD . /deps/{tmp_path.name}") < lines.index("RUN npm i")
+        assert not any(line.startswith("ADD package.json") for line in lines)
+
+    def test_nested_config_keeps_source_first(self, tmp_path: pathlib.Path) -> None:
+        # A workspace keeps manifests in subdirectories the root copy would miss.
+        root = tmp_path / "repo"
+        root.mkdir()
+        (root / "package.json").write_text(json.dumps({"name": "root"}))
+        (root / "package-lock.json").write_text("")
+        pkg = root / "packages" / "agent"
+        pkg.mkdir(parents=True)
+        (pkg / "graphs").mkdir()
+        (pkg / "graphs" / "agent.js").write_text("")
+        config_path = pkg / "langgraph.json"
+        config_path.write_text("{}")
+
+        lines = self._dockerfile(config_path, build_context=str(root)).splitlines()
+
+        assert lines.index("ADD . /deps/repo") < lines.index("RUN npm ci")
+        assert not any(line.startswith("ADD package.json") for line in lines)
+
+    def test_custom_install_command_keeps_source_first(
+        self, tmp_path: pathlib.Path
+    ) -> None:
+        # A custom command may read files the manifest copy would not include.
+        config_path = self._project(tmp_path, lockfile="package-lock.json")
+        lines = self._dockerfile(
+            config_path,
+            install_command="npm run bootstrap",
+            build_context=str(tmp_path),
+        ).splitlines()
+
+        assert lines.index(f"ADD . /deps/{tmp_path.name}") < lines.index(
+            "RUN npm run bootstrap"
+        )
+
+    @pytest.mark.parametrize(
+        "hook",
+        [
+            "preinstall",
+            "install",
+            "postinstall",
+            "prepublish",
+            "preprepare",
+            "prepare",
+            "postprepare",
+        ],
+    )
+    def test_install_hook_keeps_source_first(
+        self, tmp_path: pathlib.Path, hook: str
+    ) -> None:
+        # A hook referencing a project file would hit ENOENT: source is not copied yet.
+        config_path = self._project(
+            tmp_path,
+            lockfile="package-lock.json",
+            scripts={hook: "node scripts/setup.js"},
+        )
+        lines = self._dockerfile(config_path).splitlines()
+
+        assert lines.index(f"ADD . /deps/{tmp_path.name}") < lines.index("RUN npm ci")
+        assert not any(line.startswith("ADD package.json") for line in lines)
+
+    def test_only_the_chosen_lockfile_is_copied(self, tmp_path: pathlib.Path) -> None:
+        # Install picks yarn, so copying the npm lockfile would bust the cache for nothing.
+        config_path = self._project(tmp_path, lockfile="yarn.lock")
+        (tmp_path / "package-lock.json").write_text("")
+        dockerfile = self._dockerfile(config_path)
+
+        assert f"ADD yarn.lock /deps/{tmp_path.name}/yarn.lock" in dockerfile
+        assert "ADD package-lock.json" not in dockerfile

libs/cli/tests/unit_tests/test_deploy_agents.py

@@ -1,119 +0,0 @@
-import json
-from unittest.mock import Mock
-
-import httpx
-import pytest
-from click.testing import CliRunner
-
-import langgraph_cli.deploy as deploy
-from langgraph_cli.cli import cli
-from langgraph_cli.host_backend import HostBackendClient
-
-
-@pytest.fixture
-def deployment_api(monkeypatch, tmp_path):
-    monkeypatch.chdir(tmp_path)
-    monkeypatch.delenv("LANGSMITH_DEPLOYMENT_NAME", raising=False)
-    monkeypatch.setattr(deploy, "_emitter", None)
-    monkeypatch.setattr(deploy, "_no_input", False)
-    (tmp_path / "langgraph.json").write_text(
-        json.dumps({"dependencies": ["."], "graphs": {"agent": "./agent.py:graph"}})
-    )
-    (tmp_path / ".env").write_text("LANGSMITH_DEPLOYMENT_NAME=legacy\n")
-    requests = []
-    state = {"enabled": True, "resources": []}
-
-    def handler(request):
-        requests.append(request)
-        assert request.url.path == "/v2/deployments"
-        if request.method == "GET":
-            if not state["enabled"] and (
-                "agent_id" in request.url.params
-                or "agent_environment" in request.url.params
-            ):
-                return httpx.Response(
-                    400, text="Agent filters are not available for this tenant."
-                )
-            return httpx.Response(200, json={"resources": state["resources"]})
-        assert request.method == "POST"
-        return httpx.Response(200, json={"id": "runtime-id", "name": "server-name"})
-
-    client = HostBackendClient("https://api.example.com", "test-key")
-    client._client.close()
-    client._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=httpx.MockTransport(handler),
-        headers={"X-Api-Key": "test-key"},
-    )
-    monkeypatch.setattr(deploy, "_create_host_backend_client", lambda *a, **kw: client)
-    monkeypatch.setattr(deploy, "find_tracked_packages", lambda *a: [])
-    remote_build = Mock(return_value=deploy.BuildResult())
-    monkeypatch.setattr(deploy, "_run_remote_build", remote_build)
-    monkeypatch.setattr(deploy, "_resolve_build_mode", lambda flag, **kw: (flag, None))
-    yield state, requests, remote_build
-    client._client.close()
-
-
-AGENT_ARGS = [
-    "deploy",
-    "--agent-id",
-    "customer-support",
-    "--agent-environment",
-    "staging",
-    "--remote",
-    "--no-wait",
-    "--no-input",
-]
-
-
-def test_agent_create(deployment_api, tmp_path, monkeypatch):
-    monkeypatch.setenv("LANGSMITH_DEPLOYMENT_NAME", "legacy")
-    _, requests, build = deployment_api
-    result = CliRunner().invoke(cli, AGENT_ARGS)
-    assert result.exit_code == 0, result.output
-    assert dict(requests[0].url.params) == {
-        "agent_id": "customer-support",
-        "agent_environment": "staging",
-        "limit": "100",
-    }
-    payload = json.loads(requests[1].content)
-    assert payload["agent"] == {
-        "agent_id": "customer-support",
-        "environment": "staging",
-    }
-    assert "name" not in payload
-    assert build.call_args.kwargs["deployment_id"] == "runtime-id"
-    assert "server-name" in result.output
-    assert (tmp_path / ".env").read_text() == "LANGSMITH_DEPLOYMENT_NAME=legacy\n"
-
-
-def test_agent_update(deployment_api):
-    state, requests, build = deployment_api
-    state["resources"] = [{"id": "existing-id", "is_preview": False}]
-    result = CliRunner().invoke(cli, AGENT_ARGS)
-    assert result.exit_code == 0, result.output
-    assert len(requests) == 1
-    assert build.call_args.kwargs["deployment_id"] == "existing-id"
-
-
-def test_agent_rejects_explicit_name(deployment_api, monkeypatch):
-    monkeypatch.setenv("LANGSMITH_DEPLOYMENT_NAME", "legacy")
-    _, requests, _ = deployment_api
-    result = CliRunner().invoke(cli, [*AGENT_ARGS, "--name", "legacy"])
-    assert result.exit_code == 2
-    assert "cannot be combined" in result.output
-    assert not requests
-
-
-def test_agent_lookup_refuses_a_control_plane_that_ignores_the_filter(deployment_api):
-    state, requests, _ = deployment_api
-    state["resources"] = [
-        {"id": "someone-elses", "is_preview": False},
-        {"id": "another", "is_preview": False},
-    ]
-
-    result = CliRunner().invoke(cli, AGENT_ARGS)
-
-    assert result.exit_code != 0
-    assert "does not filter deployments by agent" in result.output
-    assert len(requests) == 1

libs/cli/tests/unit_tests/test_deploy_helpers.py

@@ -13,20 +13,6 @@ import pytest
 
 import langgraph_cli.deploy as deploy_mod
 from langgraph_cli.deploy import (
-    BuildAndPush,
-    ById,
-    ByName,
-    CreateOnlySettings,
-    CustomerRegistrySource,
-    DockerBuildCommand,
-    ExistingDeployment,
-    Listener,
-    ManagedRegistrySource,
-    OnListener,
-    PublishedImage,
-    RemoteBuildSource,
-    RequestedPlacement,
-    Unplaced,
     _call_host_backend_with_optional_tenant,
     _create_host_backend_client,
     _docker_config_for_token,
@@ -35,22 +21,17 @@ from langgraph_cli.deploy import (
     _parse_env_from_config,
     _resolve_env_path,
     _resolve_pushed_image_digest,
-    _resource_spec,
-    _select_source,
+    _smith_dashboard_base_url,
     _validate_prebuilt_image,
-    find_deployment_by_name,
     normalize_image_tag,
     normalize_name,
 )
 from langgraph_cli.host_backend import HostBackendClient, HostBackendError
-from langgraph_cli.image_reference import ImageReference
 
 
 class TestDockerConfigForToken:
     def test_creates_config_json(self):
-        with _docker_config_for_token(
-            "us-docker.pkg.dev", "my-token", "oauth2accesstoken"
-        ) as cfg:
+        with _docker_config_for_token("us-docker.pkg.dev", "my-token") as cfg:
             config_path = os.path.join(cfg, "config.json")
             assert os.path.isfile(config_path)
             with open(config_path) as f:
@@ -58,26 +39,13 @@ class TestDockerConfigForToken:
             expected_auth = base64.b64encode(b"oauth2accesstoken:my-token").decode()
             assert data == {"auths": {"us-docker.pkg.dev": {"auth": expected_auth}}}
 
-    def test_uses_the_given_username(self):
-        with _docker_config_for_token(
-            "123456789012.dkr.ecr.us-east-2.amazonaws.com", "ecr-password", "AWS"
-        ) as cfg:
-            with open(os.path.join(cfg, "config.json")) as f:
-                data = json.load(f)
-        expected_auth = base64.b64encode(b"AWS:ecr-password").decode()
-        assert data["auths"]["123456789012.dkr.ecr.us-east-2.amazonaws.com"] == {
-            "auth": expected_auth
-        }
-
     def test_tempdir_cleaned_up(self):
-        with _docker_config_for_token(
-            "registry.example.com", "tok", "oauth2accesstoken"
-        ) as cfg:
+        with _docker_config_for_token("registry.example.com", "tok") as cfg:
             assert os.path.isdir(cfg)
         assert not os.path.exists(cfg)
 
     def test_different_registries(self):
-        with _docker_config_for_token("gcr.io", "token123", "oauth2accesstoken") as cfg:
+        with _docker_config_for_token("gcr.io", "token123") as cfg:
             with open(os.path.join(cfg, "config.json")) as f:
                 data = json.load(f)
             assert "gcr.io" in data["auths"]
@@ -291,29 +259,31 @@ class TestEnvWithoutDeploymentName:
 
 class TestCallHostBackendWithOptionalTenant:
     def _make_client(self, handler):
-        c = HostBackendClient(
-            "https://api.example.com",
-            "test-key",
+        c = HostBackendClient("https://api.example.com", "test-key")
+        c._client = httpx.Client(
+            base_url="https://api.example.com",
             transport=httpx.MockTransport(handler),
+            headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+            timeout=30,
         )
         return c
 
     def _make_eu_client(self, handler):
-        c = HostBackendClient(
-            "https://eu.api.host.langchain.com",
-            "test-key",
+        c = HostBackendClient("https://eu.api.host.langchain.com", "test-key")
+        c._client = httpx.Client(
+            base_url="https://eu.api.host.langchain.com",
             transport=httpx.MockTransport(handler),
+            headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+            timeout=30,
         )
         return c
 
     def test_success_passes_through(self):
-        client = self._make_client(
-            lambda req: httpx.Response(200, json={"resources": [{"id": "dep-1"}]})
-        )
+        client = self._make_client(lambda req: httpx.Response(200, json={"ok": True}))
         result = _call_host_backend_with_optional_tenant(
             client, lambda c: c.list_deployments()
         )
-        assert result == [{"id": "dep-1"}]
+        assert result == {"ok": True}
 
     def test_403_not_enabled_gives_actionable_error(self):
         detail = (
@@ -364,6 +334,7 @@ class TestCallHostBackendWithOptionalTenant:
         assert exc_info.value.status_code == 403
         assert "smith.langchain.com" in exc_info.value.message
         assert seen_tenant_ids == [None, "workspace-123"]
+        assert client._client.headers["X-Tenant-ID"] == "workspace-123"
 
     def test_other_403_re_raises_original(self):
         client = self._make_client(
@@ -569,334 +540,60 @@ class TestCreateHostBackendClientNoInput:
         assert client is not None
 
 
-class TestCreateHostBackendClientEndpoint:
-    def test_langsmith_endpoint_from_project_env_selects_self_hosted_control_plane(
-        self, monkeypatch
-    ):
-        monkeypatch.setenv("LANGSMITH_API_KEY", "lsv2_test")
-        monkeypatch.delenv("LANGSMITH_ENDPOINT", raising=False)
+class TestSmithDashboardBaseUrl:
+    def test_none_returns_default(self):
+        assert _smith_dashboard_base_url(None) == "https://smith.langchain.com"
 
-        client = _create_host_backend_client(
-            host_url=None,
-            api_key=None,
-            env_vars={"LANGSMITH_ENDPOINT": "https://smith.example.com/api/v1"},
+    def test_empty_returns_default(self):
+        assert _smith_dashboard_base_url("") == "https://smith.langchain.com"
+
+    def test_prod_host_url(self):
+        assert (
+            _smith_dashboard_base_url("https://api.host.langchain.com")
+            == "https://smith.langchain.com"
         )
 
-        assert client.base_url == "https://smith.example.com/api-host"
-
-    def test_explicit_host_url_wins_over_langsmith_endpoint(self, monkeypatch):
-        monkeypatch.setenv("LANGSMITH_API_KEY", "lsv2_test")
-        monkeypatch.setenv("LANGSMITH_ENDPOINT", "https://smith.example.com/api/v1")
-
-        client = _create_host_backend_client(
-            host_url="https://custom.host.com", api_key=None, env_vars={}
+    def test_dev_host_url(self):
+        assert (
+            _smith_dashboard_base_url("https://dev.api.host.langchain.com")
+            == "https://dev.smith.langchain.com"
         )
 
-        assert client.base_url == "https://custom.host.com"
-
-
-class TestDockerBuildCommand:
-    @pytest.mark.parametrize(
-        ("machine", "verbose", "expected"),
-        [
-            pytest.param(
-                "x86_64",
-                False,
-                DockerBuildCommand(("docker", "build"), ()),
-                id="amd64_host_builds_natively",
-            ),
-            pytest.param(
-                "arm64",
-                False,
-                DockerBuildCommand(
-                    ("docker", "buildx", "build"),
-                    ("--platform", "linux/amd64", "--load", "--progress=plain"),
-                ),
-                id="other_hosts_capture_plain_build_logs",
-            ),
-            pytest.param(
-                "arm64",
-                True,
-                DockerBuildCommand(
-                    ("docker", "buildx", "build"),
-                    ("--platform", "linux/amd64", "--load"),
-                ),
-                id="verbose_cross_build_keeps_progress_output",
-            ),
-        ],
-    )
-    def test_for_host_targets_the_deployment_platform(self, machine, verbose, expected):
-        assert DockerBuildCommand.for_host(machine, verbose=verbose) == expected
-
-
-class TestSelectSource:
-    OPTIONS = {
-        "push_to": None,
-        "image": None,
-        "image_uri": None,
-        "image_name": None,
-        "tag": None,
-        "remote_build_flag": None,
-        "placement": RequestedPlacement(),
-        "image_pull_secrets": (),
-        "selector": ByName("my-app"),
-    }
-    REPOSITORY = "registry.example.com/app"
-
-    @pytest.mark.parametrize(
-        ("flags", "docker_available", "expected"),
-        [
-            pytest.param(
-                {"push_to": REPOSITORY},
-                True,
-                CustomerRegistrySource(
-                    image=BuildAndPush(
-                        reference=ImageReference(REPOSITORY, "latest"),
-                        prebuilt_image=None,
-                    ),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
-                ),
-                id="push_to_selects_the_external_source_with_the_default_tag",
-            ),
-            pytest.param(
-                {"push_to": f"{REPOSITORY}:v2"},
-                True,
-                CustomerRegistrySource(
-                    image=BuildAndPush(
-                        reference=ImageReference(REPOSITORY, "v2"),
-                        prebuilt_image=None,
-                    ),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
-                ),
-                id="push_to_keeps_a_tag_given_in_the_reference",
-            ),
-            pytest.param(
-                {"push_to": REPOSITORY, "tag": "v3"},
-                True,
-                CustomerRegistrySource(
-                    image=BuildAndPush(
-                        reference=ImageReference(REPOSITORY, "v3"),
-                        prebuilt_image=None,
-                    ),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
-                ),
-                id="tag_flag_composes_with_push_to",
-            ),
-            pytest.param(
-                {"push_to": REPOSITORY, "image": "app:dev"},
-                False,
-                CustomerRegistrySource(
-                    image=BuildAndPush(
-                        reference=ImageReference(REPOSITORY, "latest"),
-                        prebuilt_image="app:dev",
-                    ),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
-                ),
-                id="prebuilt_image_is_retagged_for_push_to_without_docker_checks",
-            ),
-            pytest.param(
-                {
-                    "push_to": REPOSITORY,
-                    "placement": RequestedPlacement("listener-1", "agents"),
-                },
-                True,
-                CustomerRegistrySource(
-                    image=BuildAndPush(
-                        reference=ImageReference(REPOSITORY, "latest"),
-                        prebuilt_image=None,
-                    ),
-                    create_only=CreateOnlySettings(
-                        RequestedPlacement("listener-1", "agents")
-                    ),
-                ),
-                id="push_to_carries_the_requested_placement",
-            ),
-            pytest.param(
-                {
-                    "push_to": REPOSITORY,
-                    "image_pull_secrets": ("regcred", "other-secret"),
-                },
-                True,
-                CustomerRegistrySource(
-                    image=BuildAndPush(
-                        reference=ImageReference(REPOSITORY, "latest"),
-                        prebuilt_image=None,
-                    ),
-                    create_only=CreateOnlySettings(
-                        RequestedPlacement(), ("regcred", "other-secret")
-                    ),
-                ),
-                id="push_to_carries_the_image_pull_secrets",
-            ),
-            pytest.param(
-                {"image_uri": f"{REPOSITORY}@sha256:abc123"},
-                True,
-                CustomerRegistrySource(
-                    image=PublishedImage(f"{REPOSITORY}@sha256:abc123"),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
-                ),
-                id="image_uri_selects_the_published_image_source_by_digest",
-            ),
-            pytest.param(
-                {"image_uri": f"  {REPOSITORY}@sha256:abc123  "},
-                False,
-                CustomerRegistrySource(
-                    image=PublishedImage(f"{REPOSITORY}@sha256:abc123"),
-                    create_only=CreateOnlySettings(RequestedPlacement()),
-                ),
-                id="image_uri_needs_no_local_docker_and_is_trimmed",
-            ),
-            pytest.param(
-                {
-                    "image_uri": f"{REPOSITORY}@sha256:abc123",
-                    "placement": RequestedPlacement("listener-1", "agents"),
-                },
-                False,
-                CustomerRegistrySource(
-                    image=PublishedImage(f"{REPOSITORY}@sha256:abc123"),
-                    create_only=CreateOnlySettings(
-                        RequestedPlacement("listener-1", "agents")
-                    ),
-                ),
-                id="image_uri_carries_the_requested_placement",
-            ),
-            pytest.param(
-                {"remote_build_flag": True},
-                True,
-                RemoteBuildSource(),
-                id="remote_flag_selects_the_source_upload",
-            ),
-            pytest.param(
-                {},
-                False,
-                RemoteBuildSource(),
-                id="no_local_docker_falls_back_to_the_source_upload",
-            ),
-            pytest.param(
-                {},
-                True,
-                ManagedRegistrySource(
-                    prebuilt_image=None, image_name=None, tag="latest"
-                ),
-                id="local_docker_selects_the_internal_docker_source",
-            ),
-            pytest.param(
-                {"image": "app:dev", "tag": "v1"},
-                False,
-                ManagedRegistrySource(
-                    prebuilt_image="app:dev", image_name=None, tag="v1"
-                ),
-                id="prebuilt_image_forces_the_internal_docker_source",
-            ),
-        ],
-    )
-    def test_flags_select_one_source(
-        self, monkeypatch, mocker, flags, docker_available, expected
-    ):
-        mocker.patch(
-            "langgraph_cli.deploy._get_emitter", return_value=mocker.MagicMock()
-        )
-        monkeypatch.setattr(
-            deploy_mod,
-            "can_build_locally",
-            lambda: (True, None) if docker_available else (False, "Docker is required"),
+    def test_eu_host_url(self):
+        assert (
+            _smith_dashboard_base_url("https://eu.api.host.langchain.com")
+            == "https://eu.smith.langchain.com"
         )
 
-        assert _select_source(**{**self.OPTIONS, **flags}) == expected
-
-    def test_push_to_build_requires_local_docker(self, monkeypatch):
-        monkeypatch.setattr(
-            deploy_mod, "can_build_locally", lambda: (False, "Docker is required")
+    def test_staging_host_url(self):
+        assert (
+            _smith_dashboard_base_url("https://staging.api.host.langchain.com")
+            == "https://staging.smith.langchain.com"
         )
 
-        with pytest.raises(click.UsageError, match="Docker is required"):
-            _select_source(**{**self.OPTIONS, "push_to": self.REPOSITORY})
+    def test_localhost(self):
+        assert (
+            _smith_dashboard_base_url("http://localhost:8080")
+            == "http://localhost:8080"
+        )
 
-    @pytest.mark.parametrize(
-        ("flags", "message"),
-        [
-            pytest.param(
-                {"push_to": REPOSITORY, "remote_build_flag": True},
-                "--push-to cannot be combined with --remote.",
-                id="push_to_with_remote",
-            ),
-            pytest.param(
-                {"push_to": f"{REPOSITORY}:v1", "tag": "v2"},
-                "already includes a tag",
-                id="push_to_with_a_tag_and_the_tag_flag",
-            ),
-            pytest.param(
-                {"push_to": f"{REPOSITORY}@sha256:abc"},
-                "not a digest",
-                id="push_to_with_a_digest",
-            ),
-            pytest.param(
-                {"image": "app:dev", "remote_build_flag": True},
-                "--image cannot be combined with --remote builds.",
-                id="image_with_remote",
-            ),
-            pytest.param(
-                {"placement": RequestedPlacement(listener_id="listener-1")},
-                "only apply when creating a deployment with --push-to",
-                id="listener_without_push_to",
-            ),
-            pytest.param(
-                {"placement": RequestedPlacement(k8s_namespace="agents")},
-                "only apply when creating a deployment with --push-to",
-                id="namespace_without_push_to",
-            ),
-            pytest.param(
-                {"image_pull_secrets": ("regcred",)},
-                "only apply when creating a deployment with --push-to",
-                id="image_pull_secret_without_push_to",
-            ),
-            pytest.param(
-                {"image_uri": REPOSITORY, "push_to": REPOSITORY},
-                "--image-uri cannot be combined with --push-to.",
-                id="image_uri_with_push_to",
-            ),
-            pytest.param(
-                {"image_uri": REPOSITORY, "image": "app:dev"},
-                "--image-uri cannot be combined with --image.",
-                id="image_uri_with_image",
-            ),
-            pytest.param(
-                {"image_uri": REPOSITORY, "tag": "v2"},
-                "--image-uri cannot be combined with --tag.",
-                id="image_uri_with_tag",
-            ),
-            pytest.param(
-                {"image_uri": REPOSITORY, "remote_build_flag": True},
-                "--image-uri cannot be combined with --remote.",
-                id="image_uri_with_remote",
-            ),
-            pytest.param(
-                {"image_uri": ""},
-                "--image-uri must not be empty.",
-                id="image_uri_empty",
-            ),
-            pytest.param(
-                {"image_uri": "   "},
-                "--image-uri must not be empty.",
-                id="image_uri_blank",
-            ),
-            pytest.param(
-                {"image_uri": f"{REPOSITORY}:v1.2.3"},
-                "--image-uri must pin a digest",
-                id="image_uri_with_a_mutable_tag",
-            ),
-            pytest.param(
-                {"image_uri": REPOSITORY},
-                "--image-uri must pin a digest",
-                id="image_uri_without_any_tag_or_digest",
-            ),
-        ],
-    )
-    def test_conflicting_flags_are_rejected(self, monkeypatch, flags, message):
-        monkeypatch.setattr(deploy_mod, "can_build_locally", lambda: (True, None))
+    def test_localhost_trailing_slash(self):
+        assert (
+            _smith_dashboard_base_url("http://localhost:8080/")
+            == "http://localhost:8080"
+        )
 
-        with pytest.raises(click.UsageError, match=message):
-            _select_source(**{**self.OPTIONS, **flags})
+    def test_127_0_0_1(self):
+        assert (
+            _smith_dashboard_base_url("http://127.0.0.1:3000")
+            == "http://127.0.0.1:3000"
+        )
+
+    def test_unknown_domain_returns_default(self):
+        assert (
+            _smith_dashboard_base_url("https://custom.example.com")
+            == "https://smith.langchain.com"
+        )
 
 
 class TestResolvePushedImageDigest:
@@ -947,16 +644,6 @@ class TestResolvePushedImageDigest:
         )
         assert out == "us-central1-docker.pkg.dev/proj/repo@sha256:abc123"
 
-    def test_registry_port_without_tag_still_resolves_the_digest(self):
-        runner = self._runner('["localhost:5000/repo@sha256:abc123"]')
-        out = _resolve_pushed_image_digest(
-            runner,
-            remote_image="localhost:5000/repo",
-            docker_config_dir=None,
-            verbose=False,
-        )
-        assert out == "localhost:5000/repo@sha256:abc123"
-
     def test_empty_repodigests_falls_back_with_warning(self, mocker):
         emitter = mocker.MagicMock()
         mocker.patch("langgraph_cli.deploy._get_emitter", return_value=emitter)
@@ -1060,357 +747,3 @@ class TestResolvePushedImageDigest:
         frame_locals = captured["coro"].cr_frame.f_locals
         assert "--config" not in frame_locals["args"]
         captured["coro"].close()
-
-
-class TestListener:
-    @pytest.mark.parametrize(
-        ("resource", "expected"),
-        [
-            pytest.param(
-                {
-                    "id": "listener-1",
-                    "compute_id": "prod-cluster",
-                    "compute_config": {"k8s_namespaces": ["agents", "agents-staging"]},
-                },
-                Listener("listener-1", "prod-cluster", ("agents", "agents-staging")),
-                id="reads_id_cluster_and_namespaces",
-            ),
-            pytest.param(
-                {"id": "listener-1", "compute_id": "c", "compute_config": {}},
-                Listener("listener-1", "c", ()),
-                id="missing_namespaces",
-            ),
-            pytest.param(
-                {"id": "listener-1", "compute_id": "c", "compute_config": None},
-                Listener("listener-1", "c", ()),
-                id="null_compute_config",
-            ),
-            pytest.param(
-                {"id": "listener-1"},
-                Listener("listener-1", "", ()),
-                id="only_an_id",
-            ),
-        ],
-    )
-    def test_from_resource_reads_the_control_plane_shape(self, resource, expected):
-        assert Listener.from_resource(resource) == expected
-
-
-ONE_NAMESPACE = Listener("listener-1", "prod-cluster", ("agents",))
-TWO_NAMESPACES = Listener("listener-2", "multi-cluster", ("agents", "agents-staging"))
-NO_NAMESPACE = Listener("listener-3", "broken-cluster", ())
-
-
-class TestRequestedPlacement:
-    @pytest.mark.parametrize(
-        ("request_", "listeners", "expected"),
-        [
-            pytest.param(
-                RequestedPlacement(), (), Unplaced(), id="no_listeners_no_request"
-            ),
-            pytest.param(
-                RequestedPlacement(),
-                (ONE_NAMESPACE,),
-                OnListener("listener-1", "agents"),
-                id="uses_the_only_possible_answer",
-            ),
-            pytest.param(
-                RequestedPlacement(k8s_namespace="agents-staging"),
-                (TWO_NAMESPACES,),
-                OnListener("listener-2", "agents-staging"),
-                id="namespace_alone_picks_the_only_listener",
-            ),
-        ],
-    )
-    def test_resolves_to_a_placement(self, request_, listeners, expected):
-        assert request_.among(listeners) == expected
-
-    @pytest.mark.parametrize(
-        ("request_", "listeners", "message"),
-        [
-            pytest.param(
-                RequestedPlacement(listener_id="listener-1"),
-                (),
-                "no listeners",
-                id="workspace_has_no_listeners",
-            ),
-            pytest.param(
-                RequestedPlacement(),
-                (ONE_NAMESPACE, TWO_NAMESPACES),
-                "--listener-id",
-                id="several_listeners_need_a_choice",
-            ),
-            pytest.param(
-                RequestedPlacement(k8s_namespace="agents"),
-                (ONE_NAMESPACE, TWO_NAMESPACES),
-                "--listener-id",
-                id="namespace_alone_is_ambiguous_with_several_listeners",
-            ),
-            pytest.param(
-                RequestedPlacement(k8s_namespace="agents"),
-                (),
-                "no listeners",
-                id="namespace_without_any_listener",
-            ),
-            pytest.param(
-                RequestedPlacement(),
-                (TWO_NAMESPACES,),
-                "--k8s-namespace",
-                id="several_namespaces_need_a_choice",
-            ),
-        ],
-    )
-    def test_refuses_and_names_the_choices(self, request_, listeners, message):
-        with pytest.raises(click.UsageError, match=message):
-            request_.among(listeners)
-
-    def test_the_error_lists_every_listener_with_its_cluster_and_namespaces(self):
-        with pytest.raises(click.UsageError) as error:
-            RequestedPlacement().among((ONE_NAMESPACE, TWO_NAMESPACES))
-
-        assert "listener-1" in error.value.message
-        assert "prod-cluster" in error.value.message
-        assert "agents-staging" in error.value.message
-
-    @pytest.mark.parametrize(
-        ("placement", "expected"),
-        [
-            pytest.param(Unplaced(), {}, id="unplaced_adds_nothing"),
-            pytest.param(
-                OnListener("listener-1", "agents"),
-                {
-                    "listener_id": "listener-1",
-                    "listener_config": {"k8s_namespace": "agents"},
-                },
-                id="placed_carries_listener_and_namespace",
-            ),
-        ],
-    )
-    def test_source_config_matches_the_control_plane_shape(self, placement, expected):
-        assert placement.source_config() == expected
-
-
-def test_finding_a_deployment_by_name_narrows_the_search_for_every_server_version():
-    seen: dict = {}
-
-    def handler(req: httpx.Request) -> httpx.Response:
-        seen["params"] = dict(req.url.params)
-        return httpx.Response(
-            200,
-            json={"resources": [{"id": "dep-1", "name": "agent", "source": "github"}]},
-        )
-
-    client = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
-    )
-
-    found = find_deployment_by_name(client, "agent")
-
-    assert seen["params"] == {
-        "name": "agent",
-        "name_contains": "agent",
-        "limit": "100",
-    }
-    assert found == ExistingDeployment("dep-1", "github")
-
-
-def test_a_server_that_ignores_the_exact_name_filter_never_matches_another_deployment():
-    client = HostBackendClient(
-        "https://api.example.com",
-        "key",
-        transport=httpx.MockTransport(
-            lambda req: httpx.Response(
-                200,
-                json={
-                    "resources": [
-                        {
-                            "id": "dep-other",
-                            "name": "another-teams-agent",
-                            "source": "external_docker",
-                        }
-                    ]
-                },
-            )
-        ),
-    )
-
-    assert find_deployment_by_name(client, "brand-new-agent") is None
-
-
-def test_a_full_page_without_a_match_refuses_to_claim_the_name_is_free():
-    page = [
-        {"id": f"dep-{index}", "name": f"other-agent-{index}"} for index in range(100)
-    ]
-    client = HostBackendClient(
-        "https://api.example.com",
-        "key",
-        transport=httpx.MockTransport(
-            lambda req: httpx.Response(200, json={"resources": page})
-        ),
-    )
-
-    with pytest.raises(click.ClickException, match="--deployment-id"):
-        find_deployment_by_name(client, "brand-new-agent")
-
-
-def test_a_partial_page_without_a_match_means_the_name_is_free():
-    client = HostBackendClient(
-        "https://api.example.com",
-        "key",
-        transport=httpx.MockTransport(
-            lambda req: httpx.Response(
-                200, json={"resources": [{"id": "dep-1", "name": "other"}]}
-            )
-        ),
-    )
-
-    assert find_deployment_by_name(client, "brand-new-agent") is None
-
-
-@pytest.mark.parametrize(
-    "resource",
-    [
-        pytest.param({"compute_id": "c"}, id="no_id"),
-        pytest.param({"id": ""}, id="empty_id"),
-    ],
-)
-def test_a_listener_without_an_id_is_refused(resource):
-    with pytest.raises(HostBackendError, match="without an id"):
-        Listener.from_resource(resource)
-
-
-def test_a_deployment_id_with_listener_flags_is_refused_without_probing_docker(
-    monkeypatch,
-):
-    def explode() -> tuple[bool, str | None]:
-        raise AssertionError("docker must not be probed for an argv-only conflict")
-
-    monkeypatch.setattr(deploy_mod, "can_build_locally", explode)
-
-    with pytest.raises(click.UsageError, match="dep-1"):
-        _select_source(
-            push_to="registry.example.com/app",
-            image=None,
-            image_uri=None,
-            image_name=None,
-            tag=None,
-            remote_build_flag=None,
-            placement=RequestedPlacement(listener_id="listener-1"),
-            image_pull_secrets=(),
-            selector=ById("dep-1"),
-        )
-
-
-def test_a_deployment_id_with_image_pull_secrets_is_refused_without_probing_docker(
-    monkeypatch,
-):
-    def explode() -> tuple[bool, str | None]:
-        raise AssertionError("docker must not be probed for an argv-only conflict")
-
-    monkeypatch.setattr(deploy_mod, "can_build_locally", explode)
-
-    with pytest.raises(click.UsageError, match="dep-1"):
-        _select_source(
-            push_to="registry.example.com/app",
-            image=None,
-            image_uri=None,
-            image_name=None,
-            tag=None,
-            remote_build_flag=None,
-            placement=RequestedPlacement(),
-            image_pull_secrets=("regcred",),
-            selector=ById("dep-1"),
-        )
-
-
-class TestResourceSpec:
-    def test_no_secrets_keeps_the_operator_default(self):
-        assert _resource_spec(()) == {}
-
-    def test_secrets_become_local_object_references_in_order(self):
-        assert _resource_spec(("regcred", "other-secret")) == {
-            "image_pull_secrets": [
-                {"name": "regcred"},
-                {"name": "other-secret"},
-            ],
-        }
-
-
-class TestCreateOnlySettings:
-    @pytest.mark.parametrize(
-        "name",
-        [
-            pytest.param("Bad_Name", id="uppercase_and_underscore"),
-            pytest.param("", id="empty"),
-            pytest.param("-leading-hyphen", id="leading_hyphen"),
-            pytest.param("a" * 254, id="too_long"),
-        ],
-    )
-    def test_an_invalid_secret_name_is_rejected_up_front(self, name):
-        with pytest.raises(click.UsageError, match="not a valid Kubernetes"):
-            CreateOnlySettings(RequestedPlacement(), (name,))
-
-    def test_a_valid_secret_name_is_accepted(self):
-        CreateOnlySettings(RequestedPlacement(), ("regcred-1.example",))
-
-    def test_ensure_not_existing_mentions_the_api_and_ui_for_pull_secrets(self):
-        settings = CreateOnlySettings(RequestedPlacement(), ("regcred",))
-        with pytest.raises(click.UsageError, match="API or the LangSmith UI"):
-            settings.ensure_not_existing("dep-1")
-
-    def test_ensure_not_existing_keeps_the_placement_message_unchanged(self):
-        settings = CreateOnlySettings(RequestedPlacement(listener_id="listener-1"))
-        with pytest.raises(
-            click.UsageError,
-            match="Listener and namespace are fixed when a deployment is created",
-        ):
-            settings.ensure_not_existing("dep-1")
-
-
-class TestPlacementOnAKnownListener:
-    @pytest.mark.parametrize(
-        ("request_", "listener", "expected"),
-        [
-            pytest.param(
-                RequestedPlacement(listener_id="listener-1"),
-                ONE_NAMESPACE,
-                OnListener("listener-1", "agents"),
-                id="the_only_namespace_is_used",
-            ),
-            pytest.param(
-                RequestedPlacement(listener_id="listener-2", k8s_namespace="agents"),
-                TWO_NAMESPACES,
-                OnListener("listener-2", "agents"),
-                id="the_chosen_namespace_is_used",
-            ),
-        ],
-    )
-    def test_places_on_the_listener(self, request_, listener, expected):
-        assert request_.on(listener) == expected
-
-    @pytest.mark.parametrize(
-        ("request_", "listener", "message"),
-        [
-            pytest.param(
-                RequestedPlacement(listener_id="listener-2"),
-                TWO_NAMESPACES,
-                "--k8s-namespace",
-                id="several_namespaces_need_a_choice",
-            ),
-            pytest.param(
-                RequestedPlacement(listener_id="listener-2", k8s_namespace="nope"),
-                TWO_NAMESPACES,
-                "does not serve namespace",
-                id="unknown_namespace",
-            ),
-            pytest.param(
-                RequestedPlacement(listener_id="listener-3"),
-                NO_NAMESPACE,
-                "serves no namespaces",
-                id="listener_without_namespaces",
-            ),
-        ],
-    )
-    def test_refuses_and_names_the_namespaces(self, request_, listener, message):
-        with pytest.raises(click.UsageError, match=message):
-            request_.on(listener)

libs/cli/tests/unit_tests/test_host_backend.py

@@ -3,16 +3,29 @@ import json
 import httpx
 import pytest
 
-from langgraph_cli.host_backend import (
-    ControlPlaneEndpoints,
-    HostBackendClient,
-    HostBackendError,
-)
+from langgraph_cli.host_backend import HostBackendClient, HostBackendError
+
+
+@pytest.fixture
+def mock_transport():
+    return httpx.MockTransport(lambda req: httpx.Response(200, json={"ok": True}))
+
+
+@pytest.fixture
+def client(mock_transport):
+    c = HostBackendClient("https://api.example.com", "test-key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=mock_transport,
+        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+        timeout=30,
+    )
+    return c
 
 
 def test_constructor_strips_trailing_slash():
     c = HostBackendClient("https://api.example.com/", "key")
-    assert c.base_url == "https://api.example.com"
+    assert str(c._client.base_url) == "https://api.example.com"
 
 
 def test_constructor_empty_url_raises():
@@ -26,8 +39,12 @@ def test_request_sends_headers():
         assert req.headers["accept"] == "application/json"
         return httpx.Response(200, json={"ok": True})
 
-    c = HostBackendClient(
-        "https://api.example.com", "test-key", transport=httpx.MockTransport(handler)
+    c = HostBackendClient("https://api.example.com", "test-key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=httpx.MockTransport(handler),
+        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+        timeout=30,
     )
     result = c._request("GET", "/test")
     assert result == {"ok": True}
@@ -39,8 +56,12 @@ def test_request_sends_json_payload():
         assert req.content == b'{"key":"value"}'
         return httpx.Response(200, json={"created": True})
 
-    c = HostBackendClient(
-        "https://api.example.com", "test-key", transport=httpx.MockTransport(handler)
+    c = HostBackendClient("https://api.example.com", "test-key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=httpx.MockTransport(handler),
+        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+        timeout=30,
     )
     result = c._request("POST", "/test", {"key": "value"})
     assert result == {"created": True}
@@ -48,13 +69,25 @@ def test_request_sends_json_payload():
 
 def test_request_empty_body_returns_none():
     transport = httpx.MockTransport(lambda req: httpx.Response(200, content=b""))
-    c = HostBackendClient("https://api.example.com", "test-key", transport=transport)
+    c = HostBackendClient("https://api.example.com", "test-key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=transport,
+        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+        timeout=30,
+    )
     assert c._request("DELETE", "/test") is None
 
 
 def test_request_http_error_raises():
     transport = httpx.MockTransport(lambda req: httpx.Response(404, text="not found"))
-    c = HostBackendClient("https://api.example.com", "test-key", transport=transport)
+    c = HostBackendClient("https://api.example.com", "test-key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=transport,
+        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+        timeout=30,
+    )
     with pytest.raises(HostBackendError, match="404"):
         c._request("GET", "/missing")
 
@@ -63,7 +96,13 @@ def test_request_invalid_json_raises():
     transport = httpx.MockTransport(
         lambda req: httpx.Response(200, content=b"not json")
     )
-    c = HostBackendClient("https://api.example.com", "test-key", transport=transport)
+    c = HostBackendClient("https://api.example.com", "test-key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=transport,
+        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+        timeout=30,
+    )
     with pytest.raises(HostBackendError, match="Failed to decode"):
         c._request("GET", "/bad-json")
 
@@ -72,20 +111,84 @@ def test_request_transport_error_raises():
     def handler(req: httpx.Request) -> httpx.Response:
         raise httpx.ConnectError("connection refused")
 
-    c = HostBackendClient(
-        "https://api.example.com", "test-key", transport=httpx.MockTransport(handler)
+    c = HostBackendClient("https://api.example.com", "test-key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=httpx.MockTransport(handler),
+        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+        timeout=30,
     )
     with pytest.raises(HostBackendError, match="connection refused"):
         c._request("GET", "/test")
 
 
+def test_create_deployment(client):
+    result = client.create_deployment(
+        name="my-deploy", deployment_type="dev", source="internal_docker"
+    )
+    assert result == {"ok": True}
+
+
+def test_get_deployment(client):
+    result = client.get_deployment("dep-123")
+    assert result == {"ok": True}
+
+
+def test_list_deployments(client):
+    result = client.list_deployments("my-app")
+    assert result == {"ok": True}
+
+
+def test_list_deployments_sends_query_params():
+    def handler(req: httpx.Request) -> httpx.Response:
+        assert req.url.path == "/v2/deployments"
+        assert req.url.params["name_contains"] == "my app"
+        return httpx.Response(200, json={"ok": True})
+
+    c = HostBackendClient("https://api.example.com", "test-key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=httpx.MockTransport(handler),
+        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
+        timeout=30,
+    )
+    result = c.list_deployments("my app")
+    assert result == {"ok": True}
+
+
+def test_delete_deployment(client):
+    result = client.delete_deployment("dep-123")
+    assert result == {"ok": True}
+
+
+def test_request_push_token(client):
+    result = client.request_push_token("dep-123")
+    assert result == {"ok": True}
+
+
+def test_update_deployment(client):
+    result = client.update_deployment(
+        "dep-123", "image:latest", secrets=[{"name": "KEY", "value": "val"}]
+    )
+    assert result == {"ok": True}
+
+
+def test_update_deployment_no_secrets(client):
+    result = client.update_deployment("dep-123", "image:latest")
+    assert result == {"ok": True}
+
+
 def _capturing_client(captured: dict) -> HostBackendClient:
     def handler(req: httpx.Request) -> httpx.Response:
         captured["body"] = req.read()
         return httpx.Response(200, json={"ok": True})
 
-    c = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
+    c = HostBackendClient("https://api.example.com", "key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=httpx.MockTransport(handler),
+        headers={"X-Api-Key": "key", "Accept": "application/json"},
+        timeout=30,
     )
     return c
 
@@ -96,7 +199,6 @@ def test_update_deployment_forwards_tracked_packages():
     c.update_deployment(
         "dep-123",
         "image:latest",
-        revision_source="internal_docker",
         tracked_packages=["google-adk:1.0.0"],
     )
     body = json.loads(captured["body"])
@@ -107,7 +209,7 @@ def test_update_deployment_forwards_tracked_packages():
 def test_update_deployment_omits_tracked_packages_when_absent():
     captured: dict = {}
     c = _capturing_client(captured)
-    c.update_deployment("dep-123", "image:latest", revision_source="internal_docker")
+    c.update_deployment("dep-123", "image:latest")
     body = json.loads(captured["body"])
     assert "tracked_packages" not in body
 
@@ -139,14 +241,33 @@ def test_update_deployment_internal_source_omits_tracked_packages_when_absent():
     assert "tracked_packages" not in body
 
 
+def test_list_revisions(client):
+    result = client.list_revisions("dep-123", limit=5)
+    assert result == {"ok": True}
+
+
+def test_get_revision(client):
+    result = client.get_revision("dep-123", "rev-456")
+    assert result == {"ok": True}
+
+
+def test_get_build_logs(client):
+    result = client.get_build_logs("proj-1", "rev-1", {"limit": 10})
+    assert result == {"ok": True}
+
+
 def test_get_deploy_logs_all_revisions():
     def handler(req: httpx.Request) -> httpx.Response:
         assert "/v1/projects/proj-1/deploy_logs" in str(req.url)
         assert "/revisions/" not in str(req.url)
         return httpx.Response(200, json={"logs": [{"message": "running"}]})
 
-    c = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
+    c = HostBackendClient("https://api.example.com", "key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=httpx.MockTransport(handler),
+        headers={"X-Api-Key": "key", "Accept": "application/json"},
+        timeout=30,
     )
     result = c.get_deploy_logs("proj-1", {"limit": 10})
     assert result == {"logs": [{"message": "running"}]}
@@ -157,520 +278,12 @@ def test_get_deploy_logs_specific_revision():
         assert "/v1/projects/proj-1/revisions/rev-2/deploy_logs" in str(req.url)
         return httpx.Response(200, json={"logs": []})
 
-    c = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
+    c = HostBackendClient("https://api.example.com", "key")
+    c._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=httpx.MockTransport(handler),
+        headers={"X-Api-Key": "key", "Accept": "application/json"},
+        timeout=30,
     )
     result = c.get_deploy_logs("proj-1", {"limit": 10}, revision_id="rev-2")
     assert result == {"logs": []}
-
-
-def _routing_client(seen: dict) -> HostBackendClient:
-    def handler(req: httpx.Request) -> httpx.Response:
-        seen["method"] = req.method
-        seen["url"] = str(req.url)
-        return httpx.Response(200, json={"ok": True})
-
-    c = HostBackendClient(
-        "https://api.example.com/prefix", "key", transport=httpx.MockTransport(handler)
-    )
-    return c
-
-
-@pytest.mark.parametrize(
-    ("call", "expected_body"),
-    [
-        pytest.param(
-            lambda c: c.create_deployment(
-                name="my-deploy",
-                source="internal_docker",
-                source_config={"deployment_type": "dev"},
-                source_revision_config={},
-            ),
-            {
-                "name": "my-deploy",
-                "source": "internal_docker",
-                "source_config": {"deployment_type": "dev"},
-                "source_revision_config": {},
-            },
-            id="internal_docker_create_omits_secrets_key_when_not_given",
-        ),
-        pytest.param(
-            lambda c: c.create_deployment(
-                name="my-deploy",
-                source="internal_docker",
-                source_config={"deployment_type": "prod"},
-                source_revision_config={},
-                secrets=[{"name": "KEY", "value": "val"}],
-            ),
-            {
-                "name": "my-deploy",
-                "source": "internal_docker",
-                "source_config": {"deployment_type": "prod"},
-                "source_revision_config": {},
-                "secrets": [{"name": "KEY", "value": "val"}],
-            },
-            id="internal_docker_create_forwards_secrets",
-        ),
-        pytest.param(
-            lambda c: c.update_deployment(
-                "dep-123",
-                "registry.example.com/app@sha256:abc",
-                revision_source="internal_docker",
-                secrets=[{"name": "KEY", "value": "val"}],
-            ),
-            {
-                "revision_source": "internal_docker",
-                "source_revision_config": {
-                    "image_uri": "registry.example.com/app@sha256:abc"
-                },
-                "secrets": [{"name": "KEY", "value": "val"}],
-            },
-            id="internal_docker_revision_names_its_source",
-        ),
-        pytest.param(
-            lambda c: c.update_deployment_internal_source(
-                "dep-123",
-                source_tarball_path="tarballs/src.tgz",
-                config_path="langgraph.json",
-                secrets=[],
-                install_command="yarn install",
-                build_command="yarn build",
-            ),
-            {
-                "revision_source": "internal_source",
-                "source_revision_config": {
-                    "source_tarball_path": "tarballs/src.tgz",
-                    "langgraph_config_path": "langgraph.json",
-                },
-                "source_config": {
-                    "install_command": "yarn install",
-                    "build_command": "yarn build",
-                },
-                "secrets": [],
-            },
-            id="internal_source_revision_sends_js_build_commands",
-        ),
-        pytest.param(
-            lambda c: c.update_deployment_internal_source(
-                "dep-123",
-                source_tarball_path="tarballs/src.tgz",
-                config_path="langgraph.json",
-            ),
-            {
-                "revision_source": "internal_source",
-                "source_revision_config": {
-                    "source_tarball_path": "tarballs/src.tgz",
-                    "langgraph_config_path": "langgraph.json",
-                },
-            },
-            id="internal_source_revision_omits_source_config_without_commands",
-        ),
-        pytest.param(
-            lambda c: c.create_deployment(
-                name="agent",
-                source="external_docker",
-                source_config={"resource_spec": {}},
-                source_revision_config={
-                    "image_uri": "registry.example.com/agent@sha256:1"
-                },
-                secrets=[],
-            ),
-            {
-                "name": "agent",
-                "source": "external_docker",
-                "source_config": {"resource_spec": {}},
-                "source_revision_config": {
-                    "image_uri": "registry.example.com/agent@sha256:1"
-                },
-                "secrets": [],
-            },
-            id="create_sends_the_source_configs_as_given",
-        ),
-        pytest.param(
-            lambda c: c.update_deployment(
-                "dep-1", "registry.example.com/agent@sha256:2", revision_source=None
-            ),
-            {
-                "source_revision_config": {
-                    "image_uri": "registry.example.com/agent@sha256:2"
-                }
-            },
-            id="revision_without_source_override_omits_revision_source",
-        ),
-        pytest.param(
-            lambda c: c.update_deployment(
-                "dep-1",
-                "registry.example.com/agent@sha256:2",
-                revision_source="internal_docker",
-                tracked_packages=["langgraph:1.0.0"],
-            ),
-            {
-                "revision_source": "internal_docker",
-                "source_revision_config": {
-                    "image_uri": "registry.example.com/agent@sha256:2"
-                },
-                "tracked_packages": ["langgraph:1.0.0"],
-            },
-            id="revision_with_source_override_names_it",
-        ),
-    ],
-)
-def test_request_body_matches_control_plane_contract(call, expected_body):
-    captured: dict = {}
-    call(_capturing_client(captured))
-    assert json.loads(captured["body"]) == expected_body
-
-
-@pytest.mark.parametrize(
-    ("call", "method", "route"),
-    [
-        pytest.param(
-            lambda c: c.create_deployment(
-                name="n",
-                source="internal_docker",
-                source_config={"deployment_type": "dev"},
-                source_revision_config={},
-            ),
-            "POST",
-            "/v2/deployments",
-            id="create_deployment",
-        ),
-        pytest.param(
-            lambda c: c.get_deployment("dep-1"),
-            "GET",
-            "/v2/deployments/dep-1",
-            id="get_deployment",
-        ),
-        pytest.param(
-            lambda c: c.delete_deployment("dep-1"),
-            "DELETE",
-            "/v2/deployments/dep-1",
-            id="delete_deployment",
-        ),
-        pytest.param(
-            lambda c: c.update_deployment("dep-1", "img", revision_source=None),
-            "PATCH",
-            "/v2/deployments/dep-1",
-            id="patch_deployment",
-        ),
-        pytest.param(
-            lambda c: c.request_push_token("dep-1"),
-            "POST",
-            "/v2/deployments/dep-1/push-token",
-            id="push_token",
-        ),
-        pytest.param(
-            lambda c: c.request_upload_url("dep-1"),
-            "POST",
-            "/v2/deployments/dep-1/upload-url",
-            id="upload_url",
-        ),
-        pytest.param(
-            lambda c: c.list_revisions("dep-1", limit=5),
-            "GET",
-            "/v2/deployments/dep-1/revisions?limit=5",
-            id="list_revisions_puts_limit_in_query",
-        ),
-        pytest.param(
-            lambda c: c.get_revision("dep-1", "rev-2"),
-            "GET",
-            "/v2/deployments/dep-1/revisions/rev-2",
-            id="get_revision",
-        ),
-        pytest.param(
-            lambda c: c.get_build_logs("dep-1", "rev-2", {"limit": 10}),
-            "POST",
-            "/v1/projects/dep-1/revisions/rev-2/build_logs",
-            id="build_logs",
-        ),
-    ],
-)
-def test_request_targets_control_plane_route_under_base_url(call, method, route):
-    seen: dict = {}
-    call(_routing_client(seen))
-    assert (seen["method"], seen["url"]) == (
-        method,
-        f"https://api.example.com/prefix{route}",
-    )
-
-
-def test_injected_transport_receives_requests_under_the_prefixed_base_url():
-    seen: dict = {}
-
-    def handler(req: httpx.Request) -> httpx.Response:
-        seen["url"] = str(req.url)
-        seen["api_key"] = req.headers["x-api-key"]
-        return httpx.Response(200, json={"ok": True})
-
-    c = HostBackendClient(
-        "https://smith.example.com/api-host",
-        "key",
-        transport=httpx.MockTransport(handler),
-    )
-
-    assert c.list_revisions("dep-1", limit=2) == []
-    assert seen == {
-        "url": "https://smith.example.com/api-host/v2/deployments/dep-1/revisions?limit=2",
-        "api_key": "key",
-    }
-
-
-CLOUD = ("https://api.host.langchain.com", "https://smith.langchain.com")
-
-
-@pytest.mark.parametrize(
-    ("host_url", "langsmith_endpoint", "expected"),
-    [
-        pytest.param(None, None, CLOUD, id="nothing_configured_targets_cloud"),
-        pytest.param(
-            None, "https://api.smith.langchain.com", CLOUD, id="cloud_langsmith_api"
-        ),
-        pytest.param(
-            None,
-            "https://api.smith.langchain.com/api/v1",
-            CLOUD,
-            id="cloud_langsmith_api_with_versioned_path",
-        ),
-        pytest.param(
-            None, "https://api.langchain.com", CLOUD, id="cloud_langchain_api_alias"
-        ),
-        pytest.param(
-            None,
-            "https://xapi.smith.langchain.com",
-            CLOUD,
-            id="lookalike_cloud_host_is_not_rewritten_into_a_control_plane",
-        ),
-        pytest.param(
-            None,
-            "https://eu.api.smith.langchain.com",
-            ("https://eu.api.host.langchain.com", "https://eu.smith.langchain.com"),
-            id="eu_cloud_maps_to_eu_control_plane",
-        ),
-        pytest.param(
-            None,
-            "https://dev.api.smith.langchain.com",
-            ("https://dev.api.host.langchain.com", "https://dev.smith.langchain.com"),
-            id="dev_cloud_maps_to_dev_control_plane",
-        ),
-        pytest.param(
-            None,
-            "https://aks.smith.langchain.dev/api",
-            (
-                "https://aks.smith.langchain.dev/api-host",
-                "https://aks.smith.langchain.dev",
-            ),
-            id="self_hosted_api_path_becomes_api_host",
-        ),
-        pytest.param(
-            None,
-            "https://smith.example.com/api/v1",
-            ("https://smith.example.com/api-host", "https://smith.example.com"),
-            id="self_hosted_versioned_api_path_becomes_api_host",
-        ),
-        pytest.param(
-            None,
-            "https://smith.example.com",
-            ("https://smith.example.com/api-host", "https://smith.example.com"),
-            id="self_hosted_origin_gets_api_host_appended",
-        ),
-        pytest.param(
-            None,
-            "https://corp.example.com/langsmith/api/v1",
-            (
-                "https://corp.example.com/langsmith/api-host",
-                "https://corp.example.com/langsmith",
-            ),
-            id="self_hosted_path_prefix_is_kept",
-        ),
-        pytest.param(
-            "https://custom.host.example",
-            "https://aks.smith.langchain.dev/api",
-            ("https://custom.host.example", "https://smith.langchain.com"),
-            id="explicit_host_url_beats_langsmith_endpoint",
-        ),
-        pytest.param(
-            "https://api.host.langchain.com",
-            "https://aks.smith.langchain.dev/api",
-            CLOUD,
-            id="explicit_cloud_host_url_beats_self_hosted_endpoint",
-        ),
-        pytest.param(
-            "https://smith.example.com/api-host/",
-            None,
-            ("https://smith.example.com/api-host", "https://smith.example.com"),
-            id="explicit_api_host_url_derives_dashboard_root",
-        ),
-        pytest.param(
-            "https://corp.example.com/langsmith/api-host",
-            None,
-            (
-                "https://corp.example.com/langsmith/api-host",
-                "https://corp.example.com/langsmith",
-            ),
-            id="explicit_api_host_url_keeps_path_prefix_in_dashboard",
-        ),
-        pytest.param(
-            "http://localhost:8080",
-            None,
-            ("http://localhost:8080", "http://localhost:8080"),
-            id="localhost_dashboard_is_the_same_origin",
-        ),
-        pytest.param(
-            "http://localhost:8080/api-host",
-            None,
-            ("http://localhost:8080/api-host", "http://localhost:8080"),
-            id="localhost_api_host_dashboard_is_the_origin",
-        ),
-        pytest.param(
-            "https://eu.api.host.langchain.com",
-            None,
-            ("https://eu.api.host.langchain.com", "https://eu.smith.langchain.com"),
-            id="regional_control_plane_maps_to_regional_dashboard",
-        ),
-    ],
-)
-def test_control_plane_endpoints_resolve(host_url, langsmith_endpoint, expected):
-    endpoints = ControlPlaneEndpoints.resolve(host_url, langsmith_endpoint)
-
-    assert (endpoints.control_plane_url, endpoints.dashboard_url) == expected
-
-
-@pytest.mark.parametrize(
-    ("payload", "expected"),
-    [
-        pytest.param(
-            {"resources": [{"id": "a"}, {"id": "b"}]},
-            [{"id": "a"}, {"id": "b"}],
-            id="list_returns_the_resources",
-        ),
-        pytest.param({"resources": []}, [], id="empty_list"),
-        pytest.param({}, [], id="missing_key"),
-        pytest.param({"resources": None}, [], id="null_resources"),
-        pytest.param(
-            {"resources": ["nope", {"id": "a"}]}, [{"id": "a"}], id="skips_non_objects"
-        ),
-        pytest.param([], [], id="unexpected_envelope"),
-    ],
-)
-def test_list_endpoints_return_resource_objects(payload, expected):
-    def handler(req: httpx.Request) -> httpx.Response:
-        return httpx.Response(200, json=payload)
-
-    c = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
-    )
-
-    assert c.list_deployments() == expected
-
-
-def test_list_listeners_asks_for_a_full_page():
-    seen: dict = {}
-
-    def handler(req: httpx.Request) -> httpx.Response:
-        seen["url"] = str(req.url)
-        return httpx.Response(200, json={"resources": [{"id": "listener-1"}]})
-
-    c = HostBackendClient(
-        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
-    )
-
-    assert c.list_listeners() == [{"id": "listener-1"}]
-    assert seen["url"] == "https://api.example.com/v2/listeners?limit=100"
-
-
-@pytest.mark.parametrize(
-    ("control_plane_url", "expected"),
-    [
-        pytest.param("https://api.host.langchain.com", True, id="cloud"),
-        pytest.param("https://eu.api.host.langchain.com", True, id="cloud_region"),
-        pytest.param("https://dev.api.host.langchain.com", True, id="cloud_dev"),
-        pytest.param("https://smith.example.com/api-host", False, id="self_hosted"),
-        pytest.param(
-            "https://corp.example.com/langsmith/api-host",
-            False,
-            id="self_hosted_prefix",
-        ),
-        pytest.param("http://localhost:8080/api-host", False, id="local"),
-        pytest.param(
-            "https://evil-api.host.langchain.com", False, id="lookalike_needs_a_dot"
-        ),
-    ],
-)
-def test_is_cloud_recognises_the_managed_control_plane(control_plane_url, expected):
-    endpoints = ControlPlaneEndpoints.from_control_plane_url(control_plane_url)
-
-    assert endpoints.is_cloud is expected
-
-
-@pytest.mark.parametrize(
-    ("call", "expected_params"),
-    [
-        pytest.param(
-            lambda c: c.list_deployments(name="agent"),
-            {"name": "agent"},
-            id="exact_name_filters_server_side",
-        ),
-        pytest.param(
-            lambda c: c.list_deployments(name_contains="age"),
-            {"name_contains": "age"},
-            id="substring_search_keeps_its_own_parameter",
-        ),
-        pytest.param(
-            lambda c: c.list_deployments(),
-            {},
-            id="no_filter_sends_no_parameters",
-        ),
-        pytest.param(
-            lambda c: c.list_deployments(
-                name="agent", name_contains="agent", limit=100
-            ),
-            {"name": "agent", "name_contains": "agent", "limit": "100"},
-            id="both_filters_travel_together_for_older_servers",
-        ),
-    ],
-)
-def test_list_deployments_sends_one_name_filter(call, expected_params):
-    seen: dict = {}
-
-    def handler(req: httpx.Request) -> httpx.Response:
-        seen.update(dict(req.url.params))
-        return httpx.Response(200, json={"resources": []})
-
-    call(
-        HostBackendClient(
-            "https://api.example.com", "key", transport=httpx.MockTransport(handler)
-        )
-    )
-
-    assert seen == expected_params
-
-
-@pytest.mark.parametrize(
-    ("body", "expected"),
-    [
-        pytest.param(
-            {"detail": "Source configuration error: bad listener"},
-            "Source configuration error: bad listener",
-            id="fastapi_detail_is_unwrapped",
-        ),
-        pytest.param(
-            {"detail": {"loc": ["body"], "msg": "nope"}},
-            None,
-            id="a_structured_detail_is_left_alone",
-        ),
-        pytest.param({"other": "shape"}, None, id="an_unknown_shape_is_left_alone"),
-    ],
-)
-def test_error_detail_is_readable(body, expected):
-    c = HostBackendClient(
-        "https://api.example.com",
-        "key",
-        transport=httpx.MockTransport(lambda req: httpx.Response(400, json=body)),
-    )
-
-    with pytest.raises(HostBackendError) as error:
-        c.get_deployment("dep-1")
-
-    assert error.value.detail == expected
-    if expected is not None:
-        assert error.value.message.endswith(expected)

libs/cli/tests/unit_tests/test_image_reference.py

@@ -1,71 +0,0 @@
-import pytest
-
-from langgraph_cli.image_reference import ImageReference
-
-
-@pytest.mark.parametrize(
-    ("reference", "repository", "tag"),
-    [
-        pytest.param(
-            "registry.example.com/team/app:v1",
-            "registry.example.com/team/app",
-            "v1",
-            id="tag_after_last_slash",
-        ),
-        pytest.param(
-            "registry.example.com/team/app",
-            "registry.example.com/team/app",
-            None,
-            id="no_tag",
-        ),
-        pytest.param(
-            "localhost:5000/app",
-            "localhost:5000/app",
-            None,
-            id="registry_port_is_not_a_tag",
-        ),
-        pytest.param(
-            "localhost:5000/app:latest",
-            "localhost:5000/app",
-            "latest",
-            id="registry_port_with_tag",
-        ),
-        pytest.param("app:dev", "app", "dev", id="bare_name_with_tag"),
-    ],
-)
-def test_parse_splits_repository_and_tag(reference, repository, tag):
-    assert ImageReference.parse(reference) == ImageReference(repository, tag)
-
-
-def test_with_tag_replaces_the_tag():
-    assert ImageReference("r/app", "v1").with_tag("v2") == ImageReference("r/app", "v2")
-
-
-@pytest.mark.parametrize(
-    ("reference", "expected"),
-    [
-        pytest.param(ImageReference("r/app", "v1"), "r/app:v1", id="tagged"),
-        pytest.param(ImageReference("r/app"), "r/app", id="untagged"),
-    ],
-)
-def test_str_renders_the_docker_reference(reference, expected):
-    assert str(reference) == expected
-
-
-@pytest.mark.parametrize(
-    ("repo_digest", "expected"),
-    [
-        pytest.param("localhost:5000/app@sha256:abc", True, id="same_repository"),
-        pytest.param("localhost:5000/app-2@sha256:abc", False, id="other_repository"),
-        pytest.param("mirror.example.com/app@sha256:abc", False, id="other_registry"),
-    ],
-)
-def test_matches_digest_only_for_the_same_repository(repo_digest, expected):
-    assert ImageReference("localhost:5000/app", "v1").matches_digest(repo_digest) is (
-        expected
-    )
-
-
-def test_parse_rejects_a_digest_reference():
-    with pytest.raises(ValueError, match="digest"):
-        ImageReference.parse("registry.example.com/app@sha256:abc")

libs/cli/tests/unit_tests/test_util.py

@@ -3,7 +3,6 @@ from unittest.mock import patch
 from langgraph_cli.deploy import (
     _extract_deployment_url,
     format_deployments_table,
-    format_listeners_table,
     format_revisions_table,
 )
 from langgraph_cli.util import clean_empty_lines, warn_non_wolfi_distro
@@ -256,34 +255,3 @@ def test_format_revisions_table():
     assert "rev-456" in output
     assert "rev-789" in output
     assert "REPLACED" in output
-
-
-def test_format_listeners_table():
-    output = format_listeners_table(
-        [
-            {
-                "id": "listener-1",
-                "compute_id": "prod-cluster",
-                "compute_config": {"k8s_namespaces": ["agents"]},
-            },
-            {
-                "id": "listener-2",
-                "compute_id": "multi-cluster",
-                "compute_config": {"k8s_namespaces": ["agents", "agents-staging"]},
-            },
-            {
-                "id": "listener-3",
-                "compute_id": "broken-cluster",
-            },
-        ]
-    )
-    assert "Listener ID" in output
-    assert "Compute ID" in output
-    assert "Namespaces" in output
-    assert "listener-1" in output
-    assert "prod-cluster" in output
-    assert "agents" in output
-    assert "listener-2" in output
-    assert "agents, agents-staging" in output
-    assert "listener-3" in output
-    assert "broken-cluster" in output

libs/cli/uv-examples/monorepo/uv.lock

@@ -39,15 +39,15 @@ wheels = [
 
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-version = "4.14.2"
+version = "4.13.0"
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     { name = "typing-extensions", marker = "python_full_version < '3.13'" },
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+    { url = "https://files.pythonhosted.org/packages/da/42/e921fccf5015463e32a3cf6ee7f980a6ed0f395ceeaa45060b61d86486c2/anyio-4.13.0-py3-none-any.whl", hash = "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708", size = 114353, upload-time = "2026-03-24T12:59:08.246Z" },
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 [[package]]
@@ -217,10 +217,9 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.6.2"
+version = "1.3.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "httpx" },
     { name = "jsonpatch" },
     { name = "langchain-protocol" },
     { name = "langsmith" },
@@ -231,9 +230,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
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-version = "1.2.11"
+version = "1.1.6"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
@@ -260,27 +259,27 @@ dependencies = [
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 ]
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.2.0"
+version = "4.0.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
     { name = "ormsgpack" },
 ]
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-version = "3.1.1"
+version = "3.0.5"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
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@@ -288,38 +287,35 @@ dependencies = [
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 [[package]]
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-version = "1.1.0"
+version = "1.0.9"
 source = { registry = "https://pypi.org/simple" }
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-version = "0.4.4"
+version = "0.3.13"
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-    { name = "langchain-core" },
-    { name = "langchain-protocol" },
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+    { url = "https://files.pythonhosted.org/packages/7f/3e/5db95bcf282c52709639744ca2a8b149baccf648e39c8cc87553df9eae0c/urllib3-2.7.0-py3-none-any.whl", hash = "sha256:9fb4c81ebbb1ce9531cce37674bbc6f1360472bc18ca9a553ede278ef7276897", size = 131087, upload-time = "2026-05-07T16:13:17.151Z" },
 ]
 
 [[package]]
@@ -2375,7 +2368,7 @@ wheels = [
 
 [[package]]
 name = "virtualenv"
-version = "21.7.13"
+version = "21.2.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "distlib" },
@@ -2384,9 +2377,9 @@ dependencies = [
     { name = "python-discovery" },
     { name = "typing-extensions", marker = "python_full_version < '3.11'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/13/50/c9b84eb106d0db420b9878dac0a386c5791726f127ce20b06897f6e3a1e9/virtualenv-21.7.13.tar.gz", hash = "sha256:0355558b6f33619aab31347e43643b0ebc97f61ea3acf617b2b69e1f8a843d11", size = 5360306, upload-time = "2026-09-18T04:35:49.354Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/0c/98/3a7e644e19cb26133488caff231be390579860bbbb3da35913c49a1d0a46/virtualenv-21.2.4.tar.gz", hash = "sha256:b294ef68192638004d72524ce7ef303e9d0cf5a44c95ce2e54a7500a6381cada", size = 5850742, upload-time = "2026-04-14T22:15:31.438Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/9a/ce/e74453531b0c49a58d0e8a4f9bab4495705859fee4a4f7de27d58f4a791a/virtualenv-21.7.13-py3-none-any.whl", hash = "sha256:1bea5af7463f59c4719db48fe739579a2a4f569c96f26c086edda85c96da9f59", size = 5328680, upload-time = "2026-09-18T04:35:47.194Z" },
+    { url = "https://files.pythonhosted.org/packages/27/8d/edd0bd910ff803c308ee9a6b7778621af0d10252219ad9f19ef4d4982a61/virtualenv-21.2.4-py3-none-any.whl", hash = "sha256:29d21e941795206138d0f22f4e45ff7050e5da6c6472299fb7103318763861ac", size = 5831232, upload-time = "2026-04-14T22:15:29.342Z" },
 ]
 
 [[package]]

libs/langgraph/langgraph/_internal/_constants.py

@@ -23,9 +23,6 @@ RETURN = sys.intern("__return__")
 # for writes of a task where we simply record the return value
 PREVIOUS = sys.intern("__previous__")
 # the implicit branch that handles each node's Control values
-SNAPSHOT_BUMPS = sys.intern("__snapshot_bumps__")
-# `versions_seen` key recording which entries a snapshot-only version bump
-# advanced, and the versions those nodes really read
 
 
 # --- Reserved cache namespaces ---
@@ -119,7 +116,6 @@ RESERVED = {
     ERROR,
     ERROR_SOURCE_NODE,
     NO_WRITES,
-    SNAPSHOT_BUMPS,
     # reserved config.configurable keys
     CONFIG_KEY_SEND,
     CONFIG_KEY_READ,

libs/langgraph/langgraph/channels/binop.py

@@ -2,7 +2,6 @@ import collections.abc
 from collections.abc import Callable, Sequence
 from typing import Any, Generic
 
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
 from typing_extensions import NotRequired, Required, Self
 
 from langgraph._internal._constants import OVERWRITE
@@ -117,9 +116,6 @@ class BinaryOperatorAggregate(Generic[Value], BaseChannel[Value, Value, Value]):
     def from_checkpoint(self, checkpoint: Value) -> Self:
         empty = self.__class__(self.typ, self.operator)
         empty.key = self.key
-        # A thread written while this field was a DeltaChannel stores snapshots.
-        if isinstance(checkpoint, _DeltaSnapshot):
-            checkpoint = checkpoint.value
         if checkpoint is not MISSING:
             empty.value = checkpoint
         return empty

libs/langgraph/langgraph/errors.py

@@ -28,7 +28,6 @@ __all__ = (
     "ParentCommand",
     "EmptyInputError",
     "TaskNotFound",
-    "is_invalid_resume",
 )
 
 
@@ -240,21 +239,3 @@ class NodeTimeoutError(Exception):
         self.kind = kind
         self.idle_timeout = idle_timeout
         self.run_timeout = run_timeout
-
-
-_INVALID_RESUME = "_langgraph_invalid_resume"
-
-
-def _mark_invalid_resume(error: BaseException) -> None:
-    setattr(error, _INVALID_RESUME, True)
-
-
-def is_invalid_resume(error: BaseException) -> bool:
-    """Whether `error` was raised because a resume value didn't match `response_schema`.
-
-    `interrupt()` raises a `pydantic.ValidationError` in that case. `ToolNode` uses
-    this to tell it apart from invalid tool arguments when a tool calls `interrupt()`
-    or runs a graph that does, so the resume fails and the interrupt can be answered
-    again.
-    """
-    return getattr(error, _INVALID_RESUME, False) is True

libs/langgraph/langgraph/graph/message.py

@@ -24,9 +24,6 @@ from typing_extensions import TypedDict, deprecated
 
 from langgraph._internal._constants import CONF, CONFIG_KEY_SEND, NS_SEP
 from langgraph.graph.state import StateGraph
-from langgraph.pregel._messages import (
-    _messages_delta_reducer as _messages_delta_reducer,
-)
 from langgraph.warnings import LangGraphDeprecatedSinceV10
 
 __all__ = (
@@ -238,7 +235,7 @@ def add_messages(
 
     if format == "langchain-openai":
         merged = _format_messages(merged)
-    elif cast(str | None, format):
+    elif format:
         msg = f"Unrecognized {format=}. Expected one of 'langchain-openai', None."
         raise ValueError(msg)
     else:
@@ -247,6 +244,71 @@ def add_messages(
     return merged
 
 
+def _messages_delta_reducer(
+    state: list[AnyMessage], writes: list[list[AnyMessage]]
+) -> list[AnyMessage]:
+    """**Experimental.** Batch reducer for use with `DeltaChannel`.
+
+    Processes all writes in one pass — dedup by ID, `RemoveMessage`
+    tombstoning — without calling `add_messages`.
+
+    This reducer is batching-invariant, as required by `DeltaChannel`:
+    `reducer(reducer(state, xs), ys) == reducer(state, xs + ys)`.
+
+    Raw dict / string / tuple inputs are coerced to typed `BaseMessage`
+    objects so that HTTP-driven graphs work without a separate coercion
+    step. This is not full `add_messages` parity — `REMOVE_ALL_MESSAGES`,
+    unknown-id `RemoveMessage` errors, missing-id UUID assignment, and
+    `BaseMessageChunk` conversion are not handled here.
+
+    Example::
+
+        from typing import Annotated
+        from langgraph.channels.delta import DeltaChannel
+        from langgraph.graph.message import _messages_delta_reducer
+
+        class State(TypedDict):
+            messages: Annotated[list, DeltaChannel(_messages_delta_reducer)]
+    """
+
+    # Each write is either a list of message-likes or a single message-like
+    # (BaseMessage / dict / str / tuple). Only lists flatten; everything
+    # else is one message.
+    flat: list[Any] = []
+    for w in writes:
+        if isinstance(w, list):
+            flat.extend(w)
+        else:
+            flat.append(w)
+    # Steady state: the reducer's own output is already typed, so skip
+    # `convert_to_messages` on state when the first element is a BaseMessage.
+    # Only raw input (initial dicts, deserialized blobs) hits the slow path.
+    if state and isinstance(state[0], BaseMessage):
+        state_msgs = state
+    else:
+        state_msgs = cast("list[AnyMessage]", convert_to_messages(state))
+    msgs = cast("list[AnyMessage]", convert_to_messages(flat))
+
+    index: dict[str, int] = {
+        m.id: i for i, m in enumerate(state_msgs) if m.id is not None
+    }
+    result: list[AnyMessage | None] = list(state_msgs)
+    for msg in msgs:
+        mid = msg.id
+        if mid is None:
+            result.append(msg)
+        elif isinstance(msg, RemoveMessage):
+            if mid in index:
+                result[index[mid]] = None
+                del index[mid]
+        elif mid in index:
+            result[index[mid]] = msg
+        else:
+            index[mid] = len(result)
+            result.append(msg)
+    return [m for m in result if m is not None]
+
+
 @deprecated(
     "MessageGraph is deprecated in langgraph 1.0.0, to be removed in 2.0.0. Please use StateGraph with a `messages` key instead.",
     category=None,

libs/langgraph/langgraph/pregel/_algo.py

@@ -27,7 +27,6 @@ from langgraph.checkpoint.base import (
     Checkpoint,
     PendingWrite,
     V,
-    writes_sort_key,
 )
 from langgraph.store.base import BaseStore
 from xxhash import xxh3_128_hexdigest
@@ -252,7 +251,9 @@ def apply_writes(
         Set of channels that were updated in this step.
     """
     # sort tasks on path, to ensure deterministic order for update application
-    tasks = sorted(tasks, key=lambda t: writes_sort_key(task_path_str(t.path)))
+    # any path parts after the 3rd are ignored for sorting
+    # (we use them for eg. task ids which aren't good for sorting)
+    tasks = sorted(tasks, key=lambda t: task_path_str(t.path[:3]))
     # if no task has triggers this is applying writes from the null task only
     # so we don't do anything other than update the channels written to
     bump_step = any(t.triggers for t in tasks)

libs/langgraph/langgraph/pregel/_checkpoint.py

@@ -1,39 +1,22 @@
 from __future__ import annotations
 
 import uuid
-from collections.abc import Callable, Iterable, Mapping, Sequence
+from collections.abc import Callable, Iterable, Mapping
 from datetime import datetime, timezone
-from inspect import signature
-from typing import Any, Literal
+from typing import Any, cast
 
 from langchain_core.runnables import RunnableConfig
 from langgraph.checkpoint.base import (
     BaseCheckpointSaver,
-    ChannelVersions,
     Checkpoint,
-    CheckpointTuple,
-    DeltaChannelHistory,
-    PendingWrite,
 )
 from langgraph.checkpoint.base.id import uuid6
 from langgraph.checkpoint.serde.types import _DeltaSnapshot
 
-from langgraph._internal._config import (
-    DELTA_MAX_SUPERSTEPS_SINCE_SNAPSHOT,
-    patch_configurable,
-)
-from langgraph._internal._constants import (
-    CONF,
-    CONFIG_KEY_CHECKPOINT_ID,
-    NS_END,
-    NS_SEP,
-    NULL_TASK_ID,
-    PUSH,
-    SNAPSHOT_BUMPS,
-)
+from langgraph._internal._config import DELTA_MAX_SUPERSTEPS_SINCE_SNAPSHOT
+from langgraph._internal._constants import PUSH
 from langgraph._internal._typing import MISSING
 from langgraph.channels.base import BaseChannel
-from langgraph.channels.binop import BinaryOperatorAggregate, _get_overwrite
 from langgraph.channels.delta import DeltaChannel
 from langgraph.managed.base import ManagedValueMapping, ManagedValueSpec
 
@@ -53,60 +36,31 @@ def empty_checkpoint() -> Checkpoint:
     )
 
 
-def put_writes_accepts_task_path(put_writes: Callable[..., Any]) -> bool:
-    """Whether a saver's `put_writes` or `aput_writes` takes `task_path`.
-
-    Savers written before the parameter existed don't, so it is passed only
-    when this is true.
-    """
-    return signature(put_writes).parameters.get("task_path") is not None
-
-
 def exit_delta_task_id(step: int, task_id: str) -> str:
     """Synthetic task id for exit-mode DeltaChannel writes.
 
     Embeds the superstep in the first UUID group so `ORDER BY task_id, idx`
     preserves chronological order while remaining a valid RFC UUID (required by
-    Postgres `checkpoint_writes.task_id uuid` columns). Never `NULL_TASK_ID`:
-    readers apply writes under it as the anchor checkpoint's own pending writes.
+    Postgres `checkpoint_writes.task_id uuid` columns).
     """
     parts = str(uuid.UUID(task_id)).split("-")
-    synthetic = f"{step:08d}-{parts[1]}-{parts[2]}-{parts[3]}-{parts[4]}"
-    if synthetic == NULL_TASK_ID:
-        return f"{step:08d}-0000-0000-0000-000000000001"
-    return synthetic
-
-
-def exit_delta_late_task_id(step: int, task_id: str) -> str:
-    """Synthetic task id for exit-mode writes of a superstep after the anchor's own.
-
-    Sorts after every real task id, in step order, so replay keeps them after
-    the anchor's own superstep whether a saver orders by task path or task id.
-    """
-    parts = str(uuid.UUID(task_id)).split("-")
-    return f"ffffffff-{step >> 16:04x}-{step & 0xFFFF:04x}-{parts[3]}-{parts[4]}"
+    return f"{step:08d}-{parts[1]}-{parts[2]}-{parts[3]}-{parts[4]}"
 
 
 def delta_channels_to_snapshot(
     channels: Mapping[str, BaseChannel],
     counters_since_delta_snapshot: Mapping[str, tuple[int, int]],
-    channel_versions: ChannelVersions,
 ) -> set[str]:
     """Return the set of DeltaChannel names that should snapshot now.
 
     A channel snapshots when EITHER its accumulated update count reaches
     `snapshot_frequency` OR the total supersteps since its last snapshot
-    reaches `DELTA_MAX_SUPERSTEPS_SINCE_SNAPSHOT`. A channel without a version
-    was never written on this branch, so it has nothing to snapshot. This is a
-    pure predicate — no mutation.
+    reaches `DELTA_MAX_SUPERSTEPS_SINCE_SNAPSHOT`. This is a pure
+    predicate — no mutation.
     """
     result: set[str] = set()
     for name, ch in channels.items():
-        if (
-            not isinstance(ch, DeltaChannel)
-            or not ch.is_available()
-            or name not in channel_versions
-        ):
+        if not isinstance(ch, DeltaChannel) or not ch.is_available():
             continue
         updates, supersteps = counters_since_delta_snapshot.get(name, (0, 0))
         if (
@@ -126,80 +80,15 @@ def get_updated_channels_from_tasks(
 
 def get_delta_channels_from_all_channels(
     channels: Mapping[str, BaseChannel],
-    channel_versions: ChannelVersions,
 ) -> set[str]:
-    """DeltaChannels to snapshot on the first update_state of a fresh thread:
-    the ones it wrote, as the rest have no version and nothing to store."""
+    """DeltaChannels to snapshot on the first update_state of a fresh thread."""
     return {
         k
         for k, ch in channels.items()
-        if isinstance(ch, DeltaChannel) and ch.is_available() and k in channel_versions
+        if isinstance(ch, DeltaChannel) and ch.is_available()
     }
 
 
-def delta_channels_with_pending_writes(
-    specs: Mapping[str, Any],
-    pending_writes: Iterable[PendingWrite] | None,
-) -> set[str]:
-    """DeltaChannels a branch starting from this checkpoint must snapshot.
-
-    A checkpoint's pending writes belong to the child that consumed them, and
-    nothing records which child that was. A new branch snapshots every delta
-    channel they touch, so its ancestor walk never replays them.
-    """
-    return {
-        ch
-        for _, ch, _ in pending_writes or ()
-        if isinstance(specs.get(ch), DeltaChannel)
-    }
-
-
-def delta_channels_overwritten(
-    specs: Mapping[str, Any], writes: Iterable[tuple[str, Any]]
-) -> set[str]:
-    """Return the names of the DeltaChannels that `writes` set with an `Overwrite`.
-
-    `update_state` saves a full snapshot of these channels in the checkpoint it
-    creates, like the loop does when a node returns an `Overwrite`. Otherwise,
-    reading the channel later starts from an older snapshot and replays the
-    writes the `Overwrite` threw away.
-    """
-    return {
-        ch
-        for ch, value in writes
-        if isinstance(specs.get(ch), DeltaChannel) and _get_overwrite(value)[0]
-    }
-
-
-def checkpoint_superseded(
-    saver: BaseCheckpointSaver, config: RunnableConfig, saved: CheckpointTuple
-) -> bool:
-    """Whether the thread has moved past `saved`, the checkpoint `config` addressed.
-
-    A checkpoint with a child is never the latest put, so this misses none. A
-    leaf of an abandoned branch counts as well; telling it apart would mean
-    listing the thread to look for children, which the saver can't do cheaply.
-    """
-    if not config[CONF].get(CONFIG_KEY_CHECKPOINT_ID):
-        return False
-    latest = saver.get_tuple(
-        patch_configurable(config, {CONFIG_KEY_CHECKPOINT_ID: None})
-    )
-    return latest is not None and latest.checkpoint["id"] != saved.checkpoint["id"]
-
-
-async def acheckpoint_superseded(
-    saver: BaseCheckpointSaver, config: RunnableConfig, saved: CheckpointTuple
-) -> bool:
-    """Async `checkpoint_superseded`."""
-    if not config[CONF].get(CONFIG_KEY_CHECKPOINT_ID):
-        return False
-    latest = await saver.aget_tuple(
-        patch_configurable(config, {CONFIG_KEY_CHECKPOINT_ID: None})
-    )
-    return latest is not None and latest.checkpoint["id"] != saved.checkpoint["id"]
-
-
 def create_metadata_for_update_state_api(
     channels: Mapping[str, BaseChannel],
     updated_channels: set[str],
@@ -229,34 +118,26 @@ def create_checkpoint_plan_for_update_state_api(
     channels: Mapping[str, BaseChannel],
     updated_channels: set[str],
     *,
-    source: Literal["update", "input"],
     step: int,
     parents: dict[str, Any],
     saved_metadata: Mapping[str, Any] | None,
     is_fresh_thread: bool,
-    fork_channels: set[str],
-    channel_versions: ChannelVersions,
 ) -> tuple[set[str], dict[str, Any]]:
     """Return ``(channels_to_snapshot, metadata)`` for an update_state head."""
     metadata: dict[str, Any] = {
-        "source": source,
+        "source": "update",
         "step": step,
         "parents": parents,
     }
     if is_fresh_thread:
-        return get_delta_channels_from_all_channels(
-            channels, channel_versions
-        ), metadata
+        return get_delta_channels_from_all_channels(channels), metadata
 
     new_counters = create_metadata_for_update_state_api(
         channels,
         updated_channels,
         prev_metadata=saved_metadata,
     )
-    channels_to_snapshot = (
-        delta_channels_to_snapshot(channels, new_counters, channel_versions)
-        | fork_channels
-    )
+    channels_to_snapshot = delta_channels_to_snapshot(channels, new_counters)
     for k in channels_to_snapshot:
         new_counters[k] = (0, 0)
     non_zero = {k: v for k, v in new_counters.items() if v != (0, 0)}
@@ -274,8 +155,6 @@ def create_checkpoint(
     updated_channels: set[str] | None = None,
     get_next_version: GetNextVersion | None = None,
     channels_to_snapshot: set[str] | None = None,
-    stored_versions: ChannelVersions | None = None,
-    trigger_to_nodes: Mapping[str, Sequence[str]] | None = None,
 ) -> Checkpoint:
     """Build a new Checkpoint from the previous one and live channel state.
 
@@ -285,14 +164,9 @@ def create_checkpoint(
     from `checkpoint_writes`. Callers compute the set via
     `delta_channels_to_snapshot(channels, counters)`; defaults to empty
     (no snapshots) when not provided.
-
-    `stored_versions` are the channel versions of the last checkpoint the
-    saver stored. A snapshotted channel whose version has not moved since
-    then is bumped.
     """
     ts = datetime.now(timezone.utc).isoformat()
     channels_to_snapshot = channels_to_snapshot or set()
-    bumped: dict[str, tuple[Any, Any]] = {}
     if channels is None:
         values = checkpoint["channel_values"]
         channel_versions = checkpoint["channel_versions"]
@@ -300,29 +174,30 @@ def create_checkpoint(
         values = {}
         channel_versions = dict(checkpoint["channel_versions"])
         for k in channels:
-            ch = channels[k]
             if k not in channel_versions:
-                # A forced snapshot of a never-written channel still has to
-                # land to stop the ancestor walk, and `put` only stores blobs
-                # for versioned channels.
-                if k in channels_to_snapshot and get_next_version is not None:
-                    channel_versions[k] = get_next_version(None, None)
-                    bumped[k] = (None, channel_versions[k])
-                    values[k] = _DeltaSnapshot(ch.get())
                 continue
+            ch = channels[k]
             if k in channels_to_snapshot:
-                # `put` only stores a blob for a channel whose version moved,
-                # so snapshotting a channel this step did not write needs a
-                # bump: exit mode reaching the cadence on a superstep that
-                # skipped the channel, and a fork's first checkpoint.
-                if (
-                    get_next_version is not None
-                    and stored_versions is not None
-                    and channel_versions[k] == stored_versions.get(k)
+                # Callers force a full snapshot blob here: exit mode when a
+                # delta channel reaches its snapshot cadence, and update_state
+                # on a fresh thread (no ancestor to replay writes from). The
+                # manual version-bump below only applies to the exit-mode case.
+                #
+                # In exit mode, the snapshot decision is deferred to exit
+                # time (intermediate steps have do_checkpoint=False). The
+                # channel's count may have reached snapshot_frequency over
+                # several supersteps, but the LAST superstep may not have
+                # written to this channel. In that case apply_writes()
+                # (in _algo.py) didn't bump this channel's version, so
+                # saver.put() wouldn't include it in new_versions and
+                # the snapshot blob would be silently dropped. The manual
+                # bump below closes the gap. In sync/async durability this
+                # branch is effectively dead code (the step that pushes
+                # the count to freq always writes the channel).
+                if get_next_version is not None and (
+                    updated_channels is None or k not in updated_channels
                 ):
-                    old = channel_versions[k]
-                    channel_versions[k] = get_next_version(old, None)
-                    bumped[k] = (old, channel_versions[k])
+                    channel_versions[k] = get_next_version(channel_versions[k], None)
                 values[k] = _DeltaSnapshot(ch.get())
             else:
                 v = ch.checkpoint()
@@ -334,125 +209,21 @@ def create_checkpoint(
         id=id or str(uuid6(clock_seq=step)),
         channel_values=values,
         channel_versions=channel_versions,
-        versions_seen=_mark_bumps_seen(
-            checkpoint["versions_seen"], bumped, trigger_to_nodes or {}
-        ),
+        versions_seen=checkpoint["versions_seen"],
         updated_channels=None if updated_channels is None else sorted(updated_channels),
     )
 
 
-def _mark_bumps_seen(
-    versions_seen: dict[str, ChannelVersions],
-    bumped: Mapping[str, tuple[Any, Any]],
-    trigger_to_nodes: Mapping[str, Sequence[str]],
-) -> dict[str, ChannelVersions]:
-    """Advance whoever had seen a bumped channel's old version to the new one.
+def _needs_replay(spec: BaseChannel, stored: object) -> bool:
+    """True if `spec` is a `DeltaChannel` and no value is stored at this
+    checkpoint, requiring an ancestor walk to reconstruct.
 
-    A bump that only stores a snapshot is not a write. Left unseen, it would
-    re-fire `interrupt_before` and rerun the channel's subscribers. A channel
-    bumped from no version was never written, so it also goes to the
-    subscribers that never ran: they have no entry, and would start on the bump.
-    For each entry it advances, `SNAPSHOT_BUMPS` keeps the new version and the
-    one the node really read, so `versions_seen_without_bumps` can put the read
-    back.
+    `_DeltaSnapshot` blobs and plain values (migration) resolve directly via
+    `from_checkpoint` — only absence (`MISSING`) triggers replay.
     """
-    if not bumped:
-        return versions_seen
-    out = dict(versions_seen)
-    for k, (old, _) in bumped.items():
-        if old is None:
-            for node in trigger_to_nodes.get(k, ()):
-                out.setdefault(node, {})
-    marks = dict(versions_seen.get(SNAPSHOT_BUMPS, {}))
-    for node, seen in out.items():
-        if node == SNAPSHOT_BUMPS:
-            continue
-        for k, (old, new) in bumped.items():
-            if seen.get(k) != old:
-                continue
-            advanced, read = _bump_keys(node, k)
-            # If an earlier bump set `old`, the real read is already recorded.
-            if old is not None and marks.get(advanced) != old:
-                marks[read] = old
-            marks[advanced] = new
-            out[node] = {**out[node], k: new}
-    if marks:
-        out[SNAPSHOT_BUMPS] = marks
-    return out
-
-
-def _bump_keys(node: str, channel: str) -> tuple[str, str]:
-    # Node names can't contain either separator, so the keys can't collide.
-    return f"{node}{NS_SEP}{channel}", f"{node}{NS_END}{channel}"
-
-
-def versions_seen_without_bumps(
-    versions_seen: dict[str, ChannelVersions],
-) -> dict[str, ChannelVersions]:
-    """`versions_seen` as the nodes read it: an entry a bump advanced goes back
-    to the version the node really read, or away if it never read one."""
-    if not (marks := versions_seen.get(SNAPSHOT_BUMPS)):
-        return versions_seen
-    out: dict[str, ChannelVersions] = {}
-    for node, seen in versions_seen.items():
-        if node == SNAPSHOT_BUMPS:
-            continue
-        out[node] = {}
-        for k, v in seen.items():
-            advanced, read = _bump_keys(node, k)
-            if marks.get(advanced) != v:
-                out[node][k] = v
-            elif read in marks:
-                out[node][k] = marks[read]
-    return out
-
-
-def _delta_channels_to_replay(
-    specs: Mapping[str, BaseChannel], checkpoint: Checkpoint
-) -> list[str]:
-    """Channels whose value at `checkpoint` the ancestor walk rebuilds.
-
-    A `_DeltaSnapshot` blob or a plain value (migration) resolves directly via
-    `from_checkpoint`, so only a channel with nothing stored here needs the
-    walk. A channel with no version was never written, so it is empty without
-    one; a walk for it would find no snapshot to stop at and read every
-    ancestor, every time the thread is loaded.
-
-    A `BinaryOperatorAggregate` stores its value at every version, so one with
-    nothing stored was written as a `DeltaChannel` before its annotation
-    changed, and is rebuilt the same way.
-    """
-    return [
-        k
-        for k, spec in specs.items()
-        if isinstance(spec, (DeltaChannel, BinaryOperatorAggregate))
-        and k in checkpoint["channel_versions"]
-        and checkpoint["channel_values"].get(k, MISSING) is MISSING
-    ]
-
-
-def _replay(spec: BaseChannel, history: DeltaChannelHistory) -> BaseChannel:
-    ch = spec.from_checkpoint(history.get("seed", MISSING))
-    if isinstance(ch, DeltaChannel):
-        ch.replay_writes(history["writes"])
-    else:
-        # One update per write: the writes span many supersteps, and a single
-        # call would reject a second Overwrite and drop the writes after one.
-        for _, _, value in history["writes"]:
-            ch.update([value])
-    return ch
-
-
-def _require_saver_for_history(
-    delta_channels: list[str],
-    saver: BaseCheckpointSaver | None,
-    config: RunnableConfig | None,
-) -> None:
-    if delta_channels and (saver is None or config is None):
-        raise ValueError(
-            f"DeltaChannel {delta_channels} has history to replay but no "
-            "checkpointer or config was passed to read it"
-        )
+    if not isinstance(spec, DeltaChannel):
+        return False
+    return stored is MISSING
 
 
 def channels_from_checkpoint(
@@ -480,9 +251,12 @@ def channels_from_checkpoint(
         else:
             managed_specs[k] = v
 
-    delta_channels = _delta_channels_to_replay(channel_specs, checkpoint)
-    _require_saver_for_history(delta_channels, saver, config)
-    histories: Mapping[str, DeltaChannelHistory] = {}
+    delta_channels: list[str] = [
+        k
+        for k, spec in channel_specs.items()
+        if _needs_replay(spec, checkpoint["channel_values"].get(k, MISSING))
+    ]
+    histories: Mapping[str, Any] = {}
     if delta_channels and saver is not None and config is not None:
         histories = saver.get_delta_channel_history(
             config=config, channels=delta_channels
@@ -492,7 +266,11 @@ def channels_from_checkpoint(
     for k, spec in channel_specs.items():
         ch: BaseChannel
         if k in histories:
-            ch = _replay(spec, histories[k])
+            delta_spec = cast(DeltaChannel, spec)
+            history = histories[k]
+            replay_ch = delta_spec.from_checkpoint(history.get("seed", MISSING))
+            replay_ch.replay_writes(history["writes"])
+            ch = replay_ch
         else:
             ch = spec.from_checkpoint(checkpoint["channel_values"].get(k, MISSING))
         channels[k] = ch
@@ -515,9 +293,12 @@ async def achannels_from_checkpoint(
         else:
             managed_specs[k] = v
 
-    delta_channels = _delta_channels_to_replay(channel_specs, checkpoint)
-    _require_saver_for_history(delta_channels, saver, config)
-    histories: Mapping[str, DeltaChannelHistory] = {}
+    delta_channels: list[str] = [
+        k
+        for k, spec in channel_specs.items()
+        if _needs_replay(spec, checkpoint["channel_values"].get(k, MISSING))
+    ]
+    histories: Mapping[str, Any] = {}
     if delta_channels and saver is not None and config is not None:
         histories = await saver.aget_delta_channel_history(
             config=config, channels=delta_channels
@@ -527,7 +308,11 @@ async def achannels_from_checkpoint(
     for k, spec in channel_specs.items():
         ch: BaseChannel
         if k in histories:
-            ch = _replay(spec, histories[k])
+            delta_spec = cast(DeltaChannel, spec)
+            history = histories[k]
+            replay_ch = delta_spec.from_checkpoint(history.get("seed", MISSING))
+            replay_ch.replay_writes(history["writes"])
+            ch = replay_ch
         else:
             ch = spec.from_checkpoint(checkpoint["channel_values"].get(k, MISSING))
         channels[k] = ch

libs/langgraph/langgraph/pregel/_loop.py

@@ -12,6 +12,7 @@ from contextlib import (
     ExitStack,
 )
 from datetime import datetime, timezone
+from inspect import signature
 from types import TracebackType
 from typing import (
     Any,
@@ -19,7 +20,6 @@ from typing import (
     TypeVar,
     cast,
 )
-from uuid import UUID, uuid5
 
 from langchain_core.callbacks import AsyncParentRunManager, ParentRunManager
 from langchain_core.runnables import RunnableConfig
@@ -98,17 +98,12 @@ from langgraph.pregel._algo import (
 )
 from langgraph.pregel._checkpoint import (
     achannels_from_checkpoint,
-    acheckpoint_superseded,
     channels_from_checkpoint,
-    checkpoint_superseded,
     copy_checkpoint,
     create_checkpoint,
     delta_channels_to_snapshot,
-    delta_channels_with_pending_writes,
     empty_checkpoint,
-    exit_delta_late_task_id,
     exit_delta_task_id,
-    put_writes_accepts_task_path,
 )
 from langgraph.pregel._executor import (
     AsyncBackgroundExecutor,
@@ -124,7 +119,6 @@ from langgraph.pregel._io import (
 )
 from langgraph.pregel._messages import ensure_message_ids
 from langgraph.pregel._read import PregelNode
-from langgraph.pregel._task_status import read_task_statuses
 from langgraph.pregel._utils import get_new_channel_versions, is_xxh3_128_hexdigest
 from langgraph.pregel.debug import (
     map_debug_checkpoint,
@@ -161,12 +155,6 @@ def DuplexStream(*streams: StreamProtocol) -> StreamProtocol:
     return StreamProtocol(__call__, {mode for s in streams for mode in s.modes})
 
 
-def _cacheable(writes: WritesT) -> bool:
-    # A cache hit skips the node, so a cached error would skip it without
-    # raising: only a node that finished goes to the cache.
-    return not any(c in (INTERRUPT, ERROR) for c, _ in writes)
-
-
 class PregelLoop:
     config: RunnableConfig
     store: BaseStore | None
@@ -198,7 +186,6 @@ class PregelLoop:
         Callable[
             [
                 concurrent.futures.Future | None,
-                Sequence[Any],
                 RunnableConfig,
                 Checkpoint,
                 str,
@@ -212,13 +199,11 @@ class PregelLoop:
     submit: Submit
     channels: Mapping[str, BaseChannel]
     # Futures from `checkpointer.put_writes` calls that produced delta-channel
-    # writes. `_put_checkpoint` hands this list to the save it submits, which
-    # waits for them first, so a checkpoint never becomes durable before the
-    # writes that produced it. If a write or the previous save failed, the
-    # save fails too: a DeltaChannel is rebuilt from its writes along the
-    # parent chain, so a checkpoint saved past either gap reads back short
-    # for good. Initialised to `[]` in both sync and async `__enter__`;
-    # stays `None` only when no checkpointer.
+    # writes. `_checkpointer_put_after_previous` drains this list (swap to a
+    # local `futs` then reset to `[]` and wait/gather) before putting the
+    # next checkpoint, so a checkpoint never becomes durable before the
+    # writes that produced it. Initialised to `[]` in both sync and async
+    # `__enter__`; stays `None` only when no checkpointer.
     _delta_write_futs: list[Any] | None = None
 
     # Same pattern as `_delta_write_futs` but for error-handler writes.
@@ -232,36 +217,15 @@ class PregelLoop:
     # `after_tick`). At exit, `_put_exit_delta_writes` filters out channels
     # that will snapshot, then persists the rest under an anchor parent.
     # `None` when not in exit mode (so the capture sites are no-ops).
-    # Each tuple is `(step, task_id, task_path, channel, value)`; see
-    # `_put_exit_delta_writes` for how they are ordered.
-    _exit_delta_writes: list[tuple[int, str, str, str, Any]] | None = None
+    # Each tuple is `(step, task_id, channel, value)` — `step` drives the
+    # synthetic step-prefixed task_id used to preserve chronological order
+    # under the saver's `ORDER BY task_id, idx` sorting.
+    _exit_delta_writes: list[tuple[int, str, str, Any]] | None = None
 
-    # The (task_id, channel) pairs whose delta writes are stored on the loaded
-    # checkpoint, which a resume addressed by `checkpoint_id` can rerun; this
-    # run's `Command` delta writes, kept apart from the NULL_TASK_ID writes
-    # loaded with the checkpoint; and the checkpoint's own superstep, the
-    # first one this run ticks.
-    _stored_delta_writes: set[tuple[str, str]]
-    _exit_command_writes: list[tuple[str, Any]]
-    _exit_first_step: int | None = None
-
-    # Delta channels that must snapshot at the next checkpoint, whatever their
-    # cadence counters say:
-    # * an Overwrite arrived since the last checkpoint, so sparse replay has to
-    #   start from the post-overwrite value;
-    # * the checkpoint this run starts from has pending writes to them; see
-    #   `delta_channels_with_pending_writes`.
-    _delta_channels_forced_snapshot: set[str]
-    # Set by `_first` for a resume: the writes it loaded with the checkpoint,
-    # which `after_tick` checks against the ones reapply handed back.
-    _resume_loaded_writes: Sequence[PendingWrite] = ()
-    # Tasks `_reapply_writes_to_succeeded_nodes` handed loaded writes back to.
-    _reapplied_task_ids: set[str]
-    # Tasks that wrote during this run, the only ones exit mode saves at exit.
-    _written_task_ids: set[str]
-    # A checkpoint addressed by `checkpoint_id` that the thread has moved past,
-    # so it may already have children.
-    _addressed_checkpoint_superseded: bool = False
+    # Delta channels that saw an Overwrite since the last checkpoint. These
+    # channels must snapshot after live update applies overwrite semantics so
+    # sparse replay starts from the same post-overwrite value.
+    _delta_channels_with_overwrite: set[str]
 
     # The checkpoint_config that points at the parent loaded at `__enter__`
     # (or the synthetic-empty checkpoint, on first run). We capture it
@@ -278,9 +242,6 @@ class PregelLoop:
     # `_put_exit_delta_writes` uses this to decide between anchoring on
     # the existing parent (True) or creating a lazy stub (False).
     _has_persisted_parent: bool = False
-    # True iff `__enter__` loaded the thread's latest checkpoint, not one a
-    # `checkpoint_id` addressed, so nothing has been built on it yet.
-    _loaded_latest: bool = False
 
     managed: ManagedValueMapping
     checkpoint: Checkpoint
@@ -351,6 +312,7 @@ class PregelLoop:
         self.interrupt_before = interrupt_before
         self.manager = manager
         self.is_nested = CONFIG_KEY_TASK_ID in self.config.get(CONF, {})
+        self.is_replaying = CONFIG_KEY_CHECKPOINT_ID in config[CONF]
         self._migrate_checkpoint = migrate_checkpoint
         self.trigger_to_nodes = trigger_to_nodes
         self.retry_policy = retry_policy
@@ -408,14 +370,6 @@ class PregelLoop:
             else ()
         )
         self.prev_checkpoint_config = None
-        # Whether the run points this loop at a checkpoint: a truthy
-        # `checkpoint_id`, this graph's `checkpoint_map` entry, or a replaying
-        # parent. Every task config carries `checkpoint_id: None`, so a key
-        # check would count every subgraph.
-        self._addressed = bool(
-            self.checkpoint_config[CONF].get(CONFIG_KEY_CHECKPOINT_ID)
-            or self.config[CONF].get(CONFIG_KEY_REPLAY_STATE)
-        )
         runtime = self.config[CONF].get(CONFIG_KEY_RUNTIME)
         self.control = runtime.control if isinstance(runtime, Runtime) else None
 
@@ -458,19 +412,13 @@ class PregelLoop:
             return None
         return self._graph_lifecycle_events.popleft()
 
-    def put_writes(
-        self, task_id: str, writes: WritesT, *, cached: bool = False
-    ) -> None:
+    def put_writes(self, task_id: str, writes: WritesT) -> None:
         """Put writes for a task, to be read by the next tick."""
         if not writes:
             return
-        self._written_task_ids.add(task_id)
         # deduplicate writes to special channels, last write wins
         if all(w[0] in WRITES_IDX_MAP for w in writes):
             writes = list({w[0]: w for w in writes}.values())
-        # Before the writes are saved, kept in `checkpoint_pending_writes` or
-        # applied, so all of them hold the same message ids.
-        ensure_message_ids(self.specs, writes)
         if task_id == NULL_TASK_ID:
             # writes for the null task are accumulated
             self.checkpoint_pending_writes = [
@@ -478,11 +426,6 @@ class PregelLoop:
                 for w in self.checkpoint_pending_writes
                 if w[0] != task_id or w[1] not in WRITES_IDX_MAP
             ]
-            # Savers key a regular write by its position in the list, and the
-            # special ones dropped above won't be there next time, so they go
-            # last: a resume saved ahead of an update would move it to a new
-            # slot once the list is saved again, and it would apply twice.
-            writes = sorted(writes, key=lambda w: w[0] in WRITES_IDX_MAP)
             writes_to_save: WritesT = [
                 w[1:] for w in self.checkpoint_pending_writes if w[0] == task_id
             ] + list(writes)
@@ -512,6 +455,14 @@ class PregelLoop:
 
         # save writes
         self.checkpoint_pending_writes.extend((task_id, c, v) for c, v in writes)
+        # Assign stable IDs to any id=None BaseMessages in DeltaChannel writes
+        # before the background thread serialises them. Without this, reducers
+        # that assign IDs inside apply_writes() race with serialisation and
+        # store id=None, causing get_state() replays to produce a different UUID
+        # on every call.
+        for c, v in writes_to_save:
+            if isinstance(self.specs.get(c), DeltaChannel):
+                ensure_message_ids(v)
         if self.durability != "exit" and self.checkpointer_put_writes is not None:
             config = patch_configurable(
                 self.checkpoint_config,
@@ -554,7 +505,7 @@ class PregelLoop:
                 self._error_handler_write_futs.append(fut)
         # output writes
         if hasattr(self, "tasks"):
-            self.output_writes(task_id, writes, cached=cached)
+            self.output_writes(task_id, writes)
 
     def _put_pending_writes(self) -> None:
         if self.checkpointer_put_writes is None:
@@ -571,12 +522,10 @@ class PregelLoop:
                 CONFIG_KEY_CHECKPOINT_ID: self.checkpoint["id"],
             },
         )
-        # Writes loaded with the checkpoint are stored on it already. Saving them
-        # again can file them under new indexes, and then they apply twice.
+        # group by task id
         by_task = defaultdict(list)
         for task_id, channel, value in self.checkpoint_pending_writes:
-            if task_id in self._written_task_ids:
-                by_task[task_id].append((channel, value))
+            by_task[task_id].append((channel, value))
         # submit writes to checkpointer
         for task_id, writes in by_task.items():
             if self.checkpointer_put_writes_accepts_task_path and hasattr(
@@ -632,7 +581,7 @@ class PregelLoop:
             # save the new task
             self.tasks[pushed.id] = pushed
             # match any pending writes to the new task
-            if self._reapplies_pending_writes:
+            if not self.is_replaying:
                 self._reapply_writes_to_succeeded_nodes({pushed.id: pushed})
             # return the new task, to be started if not run before
             return pushed
@@ -705,8 +654,12 @@ class PregelLoop:
             self.status = "done"
             return False
 
+        if self.control is not None and self.control.drain_requested:
+            self.status = "draining"
+            return False
+
         # if there are pending writes from a previous loop, apply them
-        if self._reapplies_pending_writes and self.checkpoint_pending_writes:
+        if not self.is_replaying and self.checkpoint_pending_writes:
             self._reapply_writes_to_succeeded_nodes(self.tasks)
             self._resume_error_handlers_if_applicable()
 
@@ -717,13 +670,6 @@ class PregelLoop:
             self.status = "interrupt_before"
             raise GraphInterrupt()
 
-        # stop before running the next tasks if a drain was requested. after
-        # the breakpoint check: a resume passes the next step's breakpoints,
-        # so draining in front of one would skip it
-        if self.control is not None and self.control.drain_requested:
-            self.status = "draining"
-            return False
-
         # produce debug output
         self._emit("tasks", map_debug_tasks, self.tasks.values())
 
@@ -737,26 +683,11 @@ class PregelLoop:
     def after_tick(self) -> None:
         # finish superstep
         writes = [w for t in self.tasks.values() for w in t.writes]
-        self._delta_channels_forced_snapshot.update(
+        self._delta_channels_with_overwrite.update(
             ch
             for ch, v in writes
             if isinstance(self.specs.get(ch), DeltaChannel) and _get_overwrite(v)[0]
         )
-        if self._resume_loaded_writes:
-            # A loaded write reapply didn't hand back belongs to a task this run
-            # drops or reruns: a `Send` that `Command(goto=...)` replaced, or an
-            # error handler that runs again.
-            self._delta_channels_forced_snapshot.update(
-                delta_channels_with_pending_writes(
-                    self.specs,
-                    [
-                        w
-                        for w in self._resume_loaded_writes
-                        if w[0] not in self._reapplied_task_ids
-                    ],
-                )
-            )
-            self._resume_loaded_writes = ()
         # all tasks have finished
         self.updated_channels = apply_writes(
             self.checkpoint,
@@ -776,25 +707,9 @@ class PregelLoop:
             )
         # capture delta-channel writes for exit-mode accumulator before clearing
         if self._exit_delta_writes is not None:
-            # On the first tick the pending writes still hold the ones loaded
-            # with the checkpoint, which are already stored on it.
-            first = self._exit_first_step is None
-            if first:
-                self._exit_first_step = self.step
-                self._exit_delta_writes.extend(
-                    (self.step, NULL_TASK_ID, "", ch, v)
-                    for ch, v in self._exit_command_writes
-                )
             for tid, ch, v in self.checkpoint_pending_writes:
-                if not isinstance(self.specs.get(ch), DeltaChannel):
-                    continue
-                if first and (
-                    tid == NULL_TASK_ID or (tid, ch) in self._stored_delta_writes
-                ):
-                    continue
-                task = self.tasks.get(tid)
-                path = task_path_str(task.path) if task else ""
-                self._exit_delta_writes.append((self.step, tid, path, ch, v))
+                if isinstance(self.specs.get(ch), DeltaChannel):
+                    self._exit_delta_writes.append((self.step, tid, ch, v))
         # clear pending writes
         self.checkpoint_pending_writes.clear()
         # only replay (re-execute) done tasks on the first tick
@@ -818,24 +733,20 @@ class PregelLoop:
 
     # private
 
-    @property
-    def _reapplies_pending_writes(self) -> bool:
-        """Whether the writes loaded with the checkpoint go back to the tasks
-        that made them, instead of those tasks rerunning."""
-        return not self.is_replaying
-
     def _reapply_writes_to_succeeded_nodes(
         self, tasks: Mapping[str, PregelExecutableTask]
     ) -> None:
-        """Restore the output of finished tasks from checkpoint to in-memory tasks.
+        """Restore successful channel writes from checkpoint to in-memory tasks.
 
-        Unfinished (failed or interrupted) tasks keep empty writes, so the
-        runner re-executes them or routes them to error handlers.
+        Skips control signals (ERROR, ERROR_SOURCE_NODE, INTERRUPT, RESUME)
+        so that failed/interrupted tasks remain with empty writes and will be
+        re-executed (or routed to error handlers) by the runner.
         """
-        for tid, status in read_task_statuses(self.checkpoint_pending_writes).items():
+        for tid, k, v in self.checkpoint_pending_writes:
+            if k in (ERROR, ERROR_SOURCE_NODE, INTERRUPT, RESUME):
+                continue
             if task := tasks.get(tid):
-                task.writes.extend(status.output)
-                self._reapplied_task_ids.add(tid)
+                task.writes.append((k, v))
 
     def _resume_error_handlers_if_applicable(self) -> None:
         """On resume, schedule error handlers for tasks that failed in a prior run.
@@ -905,23 +816,38 @@ class PregelLoop:
                 self.tasks[handler_task.id] = handler_task
 
     def _pending_interrupts(self) -> set[str]:
-        """Return the ids of interrupts that are still waiting for an answer."""
-        return {
-            interrupt.id
-            for status in read_task_statuses(self.checkpoint_pending_writes).values()
-            for interrupt in status.pending_interrupts
+        """Return the set of interrupt ids that are pending without corresponding resume values."""
+        # mapping of task ids to interrupt ids
+        pending_interrupts: dict[str, str] = {}
+
+        # set of resume task ids
+        pending_resumes: set[str] = set()
+
+        for task_id, write_type, value in self.checkpoint_pending_writes:
+            if write_type == INTERRUPT:
+                # interrupts is always a list, but there should only be one element
+                pending_interrupts[task_id] = value[0].id
+            elif write_type == RESUME:
+                pending_resumes.add(task_id)
+
+        resumed_interrupt_ids = {
+            pending_interrupts[task_id]
+            for task_id in pending_resumes
+            if task_id in pending_interrupts
         }
 
+        # Keep only interrupts whose interrupt_id is not resumed
+        hanging_interrupts: set[str] = {
+            interrupt_id
+            for interrupt_id in pending_interrupts.values()
+            if interrupt_id not in resumed_interrupt_ids
+        }
+
+        return hanging_interrupts
+
     def _first(
         self, *, input_keys: str | Sequence[str], updated_channels: set[str] | None
     ) -> set[str] | None:
-        self._stored_delta_writes = {
-            (tid, ch)
-            for tid, ch, _ in self.checkpoint_pending_writes
-            if tid != NULL_TASK_ID and isinstance(self.specs.get(ch), DeltaChannel)
-        }
-        self._exit_command_writes = []
-        self._written_task_ids = set()
         # Resuming from a previous checkpoint requires two things:
         # 1. A prior checkpoint exists (channel_versions is non-empty)
         # 2. The input signals continuation (not a fresh run with new input)
@@ -949,7 +875,7 @@ class PregelLoop:
         # writes so that interrupt() calls re-fire instead of returning
         # stale values. But if we're actively resuming, keep them —
         # multi-interrupt scenarios need previously resolved values preserved.
-        is_time_traveling = self._addressed and (
+        is_time_traveling = self.is_replaying and (
             # Time-travel to a subgraph checkpoint: the parent sets
             # RESUMING=True (it can't distinguish time-travel from resume),
             # so we check if this subgraph's own ns is in checkpoint_map.
@@ -968,47 +894,10 @@ class PregelLoop:
                 or configurable.get(CONFIG_KEY_RESUMING, False)
             )
         )
-        # Finished tasks rerun only on time travel, or on a resume at a
-        # checkpoint the thread has moved past. A resume addressed at the
-        # thread's latest checkpoint hands their writes back, as without an id.
-        self.is_replaying = is_time_traveling or self._addressed_checkpoint_superseded
         if is_time_traveling:
             self.checkpoint_pending_writes = [
                 w for w in self.checkpoint_pending_writes if w[1] != RESUME
             ]
-        # The parent checkpoint subgraphs replay from, when a fork below would
-        # otherwise move it
-        replay_bound: RunnableConfig | None = None
-        # Whether this run saves a fork checkpoint (below) to start its branch.
-        # The fork carries a `Command`'s writes itself, so nothing this run
-        # writes is stored on the checkpoint it addressed, which may have
-        # children that replay it.
-        forks = (
-            is_resuming
-            and is_time_traveling
-            and (
-                self.checkpoint_metadata.get("source") not in ("update", "fork")
-                or self._addressed_checkpoint_superseded
-            )
-        )
-        carried: list[PendingWrite] = []
-        # A resume that reapplies the head's pending writes only learns which
-        # of them go back to their tasks once those are scheduled, so
-        # `after_tick` seals the rest. Kept apart from the writes this run adds.
-        reapplies = is_resuming and self._reapplies_pending_writes
-        self._resume_loaded_writes = (
-            [w for w in self.checkpoint_pending_writes if w[0] != NULL_TASK_ID]
-            if reapplies
-            else ()
-        )
-        self._reapplied_task_ids = set()
-        self._delta_channels_forced_snapshot = (
-            set()
-            if reapplies
-            else delta_channels_with_pending_writes(
-                self.specs, self.checkpoint_pending_writes
-            )
-        )
 
         # map command to writes
         if input_is_command:
@@ -1039,26 +928,10 @@ class PregelLoop:
                 raise EmptyInputError("Received empty Command input")
             # save writes
             for tid, ws in writes.items():
-                if forks:
-                    # These skip `put_writes`, which gives messages their ids.
-                    ensure_message_ids(self.specs, ws)
-                    carried.extend((tid, c, v) for c, v in ws)
-                else:
-                    self.put_writes(tid, ws)
-                    if self._exit_delta_writes is not None and tid == NULL_TASK_ID:
-                        self._exit_command_writes.extend(
-                            (c, v)
-                            for c, v in ws
-                            if isinstance(self.specs.get(c), DeltaChannel)
-                        )
-            self._delta_channels_forced_snapshot.update(
-                delta_channels_with_pending_writes(self.specs, carried)
-            )
+                self.put_writes(tid, ws)
         # apply NULL writes
         if null_writes := [
-            w[1:]
-            for w in (*self.checkpoint_pending_writes, *carried)
-            if w[0] == NULL_TASK_ID
+            w[1:] for w in self.checkpoint_pending_writes if w[0] == NULL_TASK_ID
         ]:
             null_updated_channels = apply_writes(
                 self.checkpoint,
@@ -1083,15 +956,11 @@ class PregelLoop:
             # the parent's latest checkpoint remains the old one and
             # subsequent resumes load the wrong state.
             # Skip for update_state forks (source=update/fork) since they
-            # already have their own fork checkpoint, unless the thread moved
-            # past it: its other children would replay whatever this run
-            # stores on it.
-            if forks:
-                if (
-                    self.checkpoint_metadata.get("source") in ("update", "fork")
-                    and self.prev_checkpoint_config
-                ):
-                    replay_bound = self.prev_checkpoint_config
+            # already have their own fork checkpoint.
+            if is_time_traveling and self.checkpoint_metadata.get("source") not in (
+                "update",
+                "fork",
+            ):
                 # Clear old INTERRUPT writes from the loaded checkpoint.
                 # The fork will have a new checkpoint_id which changes
                 # task IDs — stale interrupt writes would accumulate and
@@ -1106,9 +975,6 @@ class PregelLoop:
             )
         # map inputs to channel updates
         elif input_writes := deque(map_input(input_keys, self.input)):
-            # Before the input is applied, so this run reads the message ids
-            # that are saved with it.
-            ensure_message_ids(self.specs, input_writes)
             # discard any unfinished tasks from previous checkpoint
             discard_tasks = prepare_next_tasks(
                 self.checkpoint,
@@ -1125,7 +991,7 @@ class PregelLoop:
                 manager=None,
                 updated_channels=updated_channels,
             )
-            self._delta_channels_forced_snapshot.update(
+            self._delta_channels_with_overwrite.update(
                 c
                 for c, v in input_writes
                 if isinstance(self.specs.get(c), DeltaChannel) and _get_overwrite(v)[0]
@@ -1151,29 +1017,17 @@ class PregelLoop:
             if self._exit_delta_writes is not None:
                 for c, v in input_writes:
                     if isinstance(self.specs.get(c), DeltaChannel):
-                        self._exit_delta_writes.append(
-                            (self.step, NULL_TASK_ID, "", c, v)
-                        )
-            # A DeltaChannel reads its input from the writes stored on the
-            # checkpoint this run starts from, under a task id of their own:
-            # readers apply a checkpoint's NULL_TASK_ID writes as its own state.
-            # A new thread has no checkpoint to store them on, and one a
-            # `checkpoint_id` addressed may have children that would read them,
-            # so then the input checkpoint snapshots the channel instead.
+                        self._exit_delta_writes.append((self.step, NULL_TASK_ID, c, v))
+            # Persist delta-channel input writes so sub-freq inputs are
+            # recoverable via ancestor walk (mirrors the Command input path).
             if self.durability != "exit":
                 delta_input = [
                     (c, v)
                     for c, v in input_writes
                     if isinstance(self.specs.get(c), DeltaChannel)
                 ]
-                if delta_input and self._has_persisted_parent and self._loaded_latest:
-                    self.put_writes(
-                        str(uuid5(UUID(self.checkpoint["id"]), INPUT)), delta_input
-                    )
-                else:
-                    self._delta_channels_forced_snapshot.update(
-                        c for c, _ in delta_input
-                    )
+                if delta_input:
+                    self.put_writes(NULL_TASK_ID, delta_input)
             # save input checkpoint
             self.updated_channels = updated_channels
             self._put_checkpoint({"source": "input"})
@@ -1187,11 +1041,11 @@ class PregelLoop:
             # checkpoint ID since the fork was created after the subgraph's
             # checkpoints from the original execution.
             #
-            # Only gate on is_time_traveling (not _addressed). When the
+            # Only gate on is_time_traveling (not is_replaying). When the
             # client resumes with an explicit checkpoint_id that happens to
             # point at the current head (e.g. LangGraph Studio sending
             # `checkpoint: {checkpoint_id}` alongside Command(resume=...)),
-            # the run is addressed but not time traveling. In that
+            # is_replaying is True but is_time_traveling is False. In that
             # case subgraphs should load their latest checkpoint normally,
             # not go through ReplayState's before-bound lookup which would
             # miss subgraph checkpoints created during processing of the
@@ -1199,11 +1053,7 @@ class PregelLoop:
             replay_state: ReplayState | None = None
             if is_time_traveling:
                 replay_checkpoint_id = self.checkpoint["id"]
-                if replay_bound is not None:
-                    replay_checkpoint_id = replay_bound[CONF].get(
-                        CONFIG_KEY_CHECKPOINT_ID, replay_checkpoint_id
-                    )
-                elif (
+                if (
                     self.checkpoint_metadata.get("source")
                     in (
                         "update",
@@ -1285,10 +1135,8 @@ class PregelLoop:
         )
         # create new checkpoint
         channels_to_snapshot = (
-            delta_channels_to_snapshot(
-                self.channels, new_counters, self.checkpoint["channel_versions"]
-            )
-            | self._delta_channels_forced_snapshot
+            delta_channels_to_snapshot(self.channels, new_counters)
+            | self._delta_channels_with_overwrite
             if do_checkpoint
             else set()
         )
@@ -1302,13 +1150,11 @@ class PregelLoop:
             if do_checkpoint
             else None,
             channels_to_snapshot=channels_to_snapshot,
-            stored_versions=self.checkpoint_previous_versions,
-            trigger_to_nodes=self.trigger_to_nodes,
         )
         for k in channels_to_snapshot:
             new_counters[k] = (0, 0)
         if do_checkpoint:
-            self._delta_channels_forced_snapshot.difference_update(channels_to_snapshot)
+            self._delta_channels_with_overwrite.difference_update(channels_to_snapshot)
         non_zero = {k: v for k, v in new_counters.items() if v != (0, 0)}
         if non_zero:
             self.checkpoint_metadata["counters_since_delta_snapshot"] = non_zero
@@ -1350,17 +1196,12 @@ class PregelLoop:
             )
             self.checkpoint_previous_versions = channel_versions
 
-            # Take this checkpoint's writes now: saves run in the background
-            # and can start out of order, so a save that took them itself
-            # could get another checkpoint's writes.
-            delta_write_futs, self._delta_write_futs = self._delta_write_futs, []
             # save it, without blocking
             # if there's a previous checkpoint save in progress, wait for it
             # ensuring checkpointers receive checkpoints in order
             self._put_checkpoint_fut = self.submit(
                 self._checkpointer_put_after_previous,
                 getattr(self, "_put_checkpoint_fut", None),
-                delta_write_futs,
                 self.checkpoint_config,
                 copy_checkpoint(self.checkpoint),
                 self.checkpoint_metadata,
@@ -1393,26 +1234,18 @@ class PregelLoop:
         ):
             return
 
-        # A checkpoint a `checkpoint_id` addressed may already have children,
-        # which read the writes stored on it, so then the channels this run
-        # wrote snapshot instead.
-        if self._has_persisted_parent and not self._loaded_latest:
-            self._delta_channels_forced_snapshot.update(
-                w[3] for w in self._exit_delta_writes
-            )
-
         counters = dict(
             self.checkpoint_metadata.get("counters_since_delta_snapshot") or {}
         )
         channels_to_snapshot = (
-            delta_channels_to_snapshot(
-                self.channels, counters, self.checkpoint["channel_versions"]
-            )
-            | self._delta_channels_forced_snapshot
+            delta_channels_to_snapshot(self.channels, counters)
+            | self._delta_channels_with_overwrite
         )
 
         pending = [
-            w for w in self._exit_delta_writes if w[3] not in channels_to_snapshot
+            (step, tid, ch, v)
+            for (step, tid, ch, v) in self._exit_delta_writes
+            if ch not in channels_to_snapshot
         ]
         if not pending:
             return
@@ -1438,7 +1271,6 @@ class PregelLoop:
             self._put_checkpoint_fut = self.submit(
                 self._checkpointer_put_after_previous,
                 getattr(self, "_put_checkpoint_fut", None),
-                (),
                 stub_put_config,
                 stub_cp,
                 {"step": -2},
@@ -1448,21 +1280,11 @@ class PregelLoop:
             # sees the stub as its parent.
             self.checkpoint_config = anchor_config
 
-        # The checkpoint's own superstep keeps its real task paths, so it
-        # interleaves with the writes a resume loaded from it. Its task ids stay
-        # synthetic: under the real id, a run whose final checkpoint fails to
-        # save would leave the resumed task looking done to the next resume.
-        # Later supersteps sort after every real task path and task id, in step
-        # order, so this holds whether a saver orders by path or by id.
-        grouped: dict[tuple[str, str], list[tuple[str, Any]]] = {}
-        for step, tid, path, ch, v in pending:
-            if tid == NULL_TASK_ID:
-                key = (exit_delta_task_id(step, tid), "")
-            elif step == self._exit_first_step:
-                key = (exit_delta_task_id(step, tid), path)
-            else:
-                key = (exit_delta_late_task_id(step, tid), f"~~{step:010d}{path}")
-            grouped.setdefault(key, []).append((ch, v))
+        # Step-prefixed synthetic task_id preserves chronological superstep
+        # order under the saver's ORDER BY task_id, idx sorting.
+        grouped: dict[tuple[int, str], list[tuple[str, Any]]] = {}
+        for step, tid, ch, v in pending:
+            grouped.setdefault((step, tid), []).append((ch, v))
         anchor_write_config = patch_configurable(
             anchor_config,
             {
@@ -1472,21 +1294,22 @@ class PregelLoop:
                 CONFIG_KEY_CHECKPOINT_ID: anchor_config[CONF][CONFIG_KEY_CHECKPOINT_ID],
             },
         )
-        for (tid, path), entries in grouped.items():
+        for (step, tid), entries in grouped.items():
+            synth_tid = exit_delta_task_id(step, tid)
             if self.checkpointer_put_writes_accepts_task_path:
                 fut = self.submit(
                     self.checkpointer_put_writes,
                     anchor_write_config,
                     entries,
-                    tid,
-                    path,
+                    synth_tid,
+                    "",
                 )
             else:
                 fut = self.submit(
                     self.checkpointer_put_writes,
                     anchor_write_config,
                     entries,
-                    tid,
+                    synth_tid,
                 )
             if self._delta_write_futs is not None:
                 self._delta_write_futs.append(fut)
@@ -1695,7 +1518,8 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
             self.checkpointer_get_next_version = checkpointer.get_next_version
             self.checkpointer_put_writes = checkpointer.put_writes
             self.checkpointer_put_writes_accepts_task_path = (
-                put_writes_accepts_task_path(checkpointer.put_writes)
+                signature(checkpointer.put_writes).parameters.get("task_path")
+                is not None
             )
         else:
             self.checkpointer_get_next_version = increment
@@ -1706,19 +1530,21 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
     def _checkpointer_put_after_previous(
         self,
         prev: concurrent.futures.Future | None,
-        delta_write_futs: Sequence[concurrent.futures.Future],
         config: RunnableConfig,
         checkpoint: Checkpoint,
         metadata: CheckpointMetadata,
         new_versions: ChannelVersions,
     ) -> RunnableConfig:
-        for fut in delta_write_futs:
-            fut.result()
-        if prev is not None:
-            prev.result()
-        cast(BaseCheckpointSaver, self.checkpointer).put(
-            config, checkpoint, metadata, new_versions
-        )
+        if self._delta_write_futs:
+            futs, self._delta_write_futs = self._delta_write_futs, []
+            concurrent.futures.wait(futs)
+        try:
+            if prev is not None:
+                prev.result()
+        finally:
+            cast(BaseCheckpointSaver, self.checkpointer).put(
+                config, checkpoint, metadata, new_versions
+            )
 
     def match_cached_writes(self) -> Sequence[PregelExecutableTask]:
         if self.cache is None:
@@ -1740,7 +1566,7 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
     ) -> PregelExecutableTask | None:
         if pushed := super().accept_push(task, write_idx, call):
             for task in self.match_cached_writes():
-                self.put_writes(task.id, task.writes, cached=True)
+                self.output_writes(task.id, task.writes, cached=True)
         return pushed
 
     def schedule_error_handler(
@@ -1774,21 +1600,19 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
         if handler_task is None:
             return None
         self.tasks[handler_task.id] = handler_task
-        if self._reapplies_pending_writes:
+        if not self.is_replaying:
             self._reapply_writes_to_succeeded_nodes({handler_task.id: handler_task})
         for task in self.match_cached_writes():
-            self.put_writes(task.id, task.writes, cached=True)
+            self.output_writes(task.id, task.writes, cached=True)
         return handler_task
 
-    def put_writes(
-        self, task_id: str, writes: WritesT, *, cached: bool = False
-    ) -> None:
+    def put_writes(self, task_id: str, writes: WritesT) -> None:
         """Put writes for a task, to be read by the next tick."""
-        super().put_writes(task_id, writes, cached=cached)
-        if cached or not writes or self.cache is None or not hasattr(self, "tasks"):
+        super().put_writes(task_id, writes)
+        if not writes or self.cache is None or not hasattr(self, "tasks"):
             return
         task = self.tasks.get(task_id)
-        if task is None or task.cache_key is None or not _cacheable(writes):
+        if task is None or task.cache_key is None:
             return
         self.submit(
             self.cache.set,
@@ -1811,10 +1635,6 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
             # This covers both normal replay and subgraphs resolved via
             # checkpoint_map during time-travel.
             saved = self.checkpointer.get_tuple(self.checkpoint_config)
-            if saved is not None:
-                self._addressed_checkpoint_superseded = checkpoint_superseded(
-                    self.checkpointer, self.checkpoint_config, saved
-                )
         elif replay_state := self.config[CONF].get(CONFIG_KEY_REPLAY_STATE):
             # Subgraph replay: the parent is replaying and passed us a
             # replay_state with its checkpoint_id. Look up our checkpoint
@@ -1832,7 +1652,6 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
             # Normal case: fetch the most recent checkpoint for this
             # graph/thread. Returns None on first invocation.
             saved = self.checkpointer.get_tuple(self.checkpoint_config)
-            self._loaded_latest = True
 
         # Capture before the synthetic-empty fallback below overwrites `saved`.
         # `_put_exit_delta_writes` uses this on first run (no persisted parent)
@@ -1865,6 +1684,7 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
         )
         self._delta_write_futs = []
         self._error_handler_write_futs = []
+        self._delta_channels_with_overwrite = set()
         self._exit_delta_writes = (
             [] if self.durability == "exit" and self.checkpointer is not None else None
         )
@@ -1951,7 +1771,8 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
             self.checkpointer_get_next_version = checkpointer.get_next_version
             self.checkpointer_put_writes = checkpointer.aput_writes
             self.checkpointer_put_writes_accepts_task_path = (
-                put_writes_accepts_task_path(checkpointer.aput_writes)
+                signature(checkpointer.aput_writes).parameters.get("task_path")
+                is not None
             )
         else:
             self.checkpointer_get_next_version = increment
@@ -1962,19 +1783,23 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
     async def _checkpointer_put_after_previous(
         self,
         prev: asyncio.Task | None,
-        delta_write_futs: Sequence[asyncio.Future],
         config: RunnableConfig,
         checkpoint: Checkpoint,
         metadata: CheckpointMetadata,
         new_versions: ChannelVersions,
     ) -> RunnableConfig:
-        if delta_write_futs:
-            await asyncio.gather(*delta_write_futs)
-        if prev is not None:
-            await prev
-        await cast(BaseCheckpointSaver, self.checkpointer).aput(
-            config, checkpoint, metadata, new_versions
-        )
+        # Drain DeltaChannel write futures before committing the checkpoint so
+        # ancestor walks never see a checkpoint without its backing writes.
+        if self._delta_write_futs:
+            futs, self._delta_write_futs = self._delta_write_futs, []
+            await asyncio.gather(*futs)
+        try:
+            if prev is not None:
+                await prev
+        finally:
+            await cast(BaseCheckpointSaver, self.checkpointer).aput(
+                config, checkpoint, metadata, new_versions
+            )
 
     async def amatch_cached_writes(self) -> Sequence[PregelExecutableTask]:
         if self.cache is None:
@@ -1996,7 +1821,7 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
     ) -> PregelExecutableTask | None:
         if pushed := super().accept_push(task, write_idx, call):
             for task in await self.amatch_cached_writes():
-                self.put_writes(task.id, task.writes, cached=True)
+                self.output_writes(task.id, task.writes, cached=True)
         return pushed
 
     async def aschedule_error_handler(
@@ -2030,21 +1855,22 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
         if handler_task is None:
             return None
         self.tasks[handler_task.id] = handler_task
-        if self._reapplies_pending_writes:
+        if not self.is_replaying:
             self._reapply_writes_to_succeeded_nodes({handler_task.id: handler_task})
         for task in await self.amatch_cached_writes():
-            self.put_writes(task.id, task.writes, cached=True)
+            self.output_writes(task.id, task.writes, cached=True)
         return handler_task
 
-    def put_writes(
-        self, task_id: str, writes: WritesT, *, cached: bool = False
-    ) -> None:
+    def put_writes(self, task_id: str, writes: WritesT) -> None:
         """Put writes for a task, to be read by the next tick."""
-        super().put_writes(task_id, writes, cached=cached)
-        if cached or not writes or self.cache is None or not hasattr(self, "tasks"):
+        super().put_writes(task_id, writes)
+        if not writes or self.cache is None or not hasattr(self, "tasks"):
             return
         task = self.tasks.get(task_id)
-        if task is None or task.cache_key is None or not _cacheable(writes):
+        if task is None or task.cache_key is None:
+            return
+        if writes[0][0] in (INTERRUPT, ERROR):
+            # only cache successful tasks
             return
         self.submit(
             self.cache.aset,
@@ -2067,10 +1893,6 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
             # This covers both normal replay and subgraphs resolved via
             # checkpoint_map during time-travel.
             saved = await self.checkpointer.aget_tuple(self.checkpoint_config)
-            if saved is not None:
-                self._addressed_checkpoint_superseded = await acheckpoint_superseded(
-                    self.checkpointer, self.checkpoint_config, saved
-                )
         elif replay_state := self.config[CONF].get(CONFIG_KEY_REPLAY_STATE):
             # Subgraph replay: the parent is replaying and passed us a
             # replay_state with its checkpoint_id. Look up our checkpoint
@@ -2088,7 +1910,6 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
             # Normal case: fetch the most recent checkpoint for this
             # graph/thread. Returns None on first invocation.
             saved = await self.checkpointer.aget_tuple(self.checkpoint_config)
-            self._loaded_latest = True
 
         # Capture before the synthetic-empty fallback below overwrites `saved`.
         # `_put_exit_delta_writes` uses this on first run (no persisted parent)
@@ -2121,6 +1942,7 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
         )
         self._delta_write_futs = []
         self._error_handler_write_futs = []
+        self._delta_channels_with_overwrite = set()
         self._exit_delta_writes = (
             [] if self.durability == "exit" and self.checkpointer is not None else None
         )

libs/langgraph/langgraph/pregel/_messages.py

@@ -1,13 +1,6 @@
 from __future__ import annotations
 
-from collections.abc import (
-    AsyncIterator,
-    Callable,
-    Iterator,
-    Mapping,
-    MutableSequence,
-    Sequence,
-)
+from collections.abc import AsyncIterator, Callable, Iterator, Sequence
 from dataclasses import fields, is_dataclass
 from typing import (
     Any,
@@ -17,18 +10,16 @@ from typing import (
 from uuid import UUID, uuid4
 
 from langchain_core.callbacks import BaseCallbackHandler
-from langchain_core.messages import AnyMessage, BaseMessage, RemoveMessage, ToolMessage
+from langchain_core.messages import BaseMessage, ToolMessage
 from langchain_core.messages.utils import convert_to_messages
 from langchain_core.outputs import ChatGeneration, ChatGenerationChunk, LLMResult
 from pydantic import BaseModel
 
 from langgraph._internal._config import filter_to_user_tags
 from langgraph._internal._constants import NS_SEP
-from langgraph.channels.binop import _get_overwrite
-from langgraph.channels.delta import DeltaChannel
 from langgraph.constants import TAG_HIDDEN, TAG_NOSTREAM
 from langgraph.pregel.protocol import StreamChunk
-from langgraph.types import Command, Overwrite
+from langgraph.types import Command
 
 try:
     from langchain_core.tracers._streaming import _StreamingCallbackHandler
@@ -417,74 +408,6 @@ class StreamMessagesHandlerV2(StreamMessagesHandler, _V2StreamingCallbackHandler
             self.stream((meta[0], "messages", (event, v2_meta)))
 
 
-# Defined here rather than in `langgraph.graph.message`, which re-exports it:
-# `ensure_message_ids` has to recognize it, and importing that module from the
-# loop would be an import cycle.
-def _messages_delta_reducer(
-    state: list[AnyMessage], writes: list[list[AnyMessage]]
-) -> list[AnyMessage]:
-    """**Experimental.** Batch reducer for use with `DeltaChannel`.
-
-    Processes all writes in one pass — dedup by ID, `RemoveMessage`
-    tombstoning — without calling `add_messages`.
-
-    This reducer is batching-invariant, as required by `DeltaChannel`:
-    `reducer(reducer(state, xs), ys) == reducer(state, xs + ys)`.
-
-    Raw dict / string / tuple inputs are coerced to typed `BaseMessage`
-    objects so that HTTP-driven graphs work without a separate coercion
-    step. This is not full `add_messages` parity — `REMOVE_ALL_MESSAGES`,
-    unknown-id `RemoveMessage` errors, missing-id UUID assignment, and
-    `BaseMessageChunk` conversion are not handled here.
-
-    Example::
-
-        from typing import Annotated
-        from langgraph.channels.delta import DeltaChannel
-        from langgraph.graph.message import _messages_delta_reducer
-
-        class State(TypedDict):
-            messages: Annotated[list, DeltaChannel(_messages_delta_reducer)]
-    """
-
-    # Each write is either a list of message-likes or a single message-like
-    # (BaseMessage / dict / str / tuple). Only lists flatten; everything
-    # else is one message.
-    flat: list[Any] = []
-    for w in writes:
-        if isinstance(w, list):
-            flat.extend(w)
-        else:
-            flat.append(w)
-    # Steady state: the reducer's own output is already typed, so skip
-    # `convert_to_messages` on state when the first element is a BaseMessage.
-    # Only raw input (initial dicts, deserialized blobs) hits the slow path.
-    if state and isinstance(state[0], BaseMessage):
-        state_msgs = state
-    else:
-        state_msgs = cast("list[AnyMessage]", convert_to_messages(state))
-    msgs = cast("list[AnyMessage]", convert_to_messages(flat))
-
-    index: dict[str, int] = {
-        m.id: i for i, m in enumerate(state_msgs) if m.id is not None
-    }
-    result: list[AnyMessage | None] = list(state_msgs)
-    for msg in msgs:
-        mid = msg.id
-        if mid is None:
-            result.append(msg)
-        elif isinstance(msg, RemoveMessage):
-            if mid in index:
-                result[index[mid]] = None
-                del index[mid]
-        elif mid in index:
-            result[index[mid]] = msg
-        else:
-            index[mid] = len(result)
-            result.append(msg)
-    return [m for m in result if m is not None]
-
-
 # Known role values (OpenAI-style) and type values (LangChain serialisation)
 # that identify a dict as a message. Checked before coercing to BaseMessage so
 # we don't accidentally touch unrelated dicts that happen to have a "role" key.
@@ -500,103 +423,39 @@ def _is_message_dict(item: dict) -> bool:
     return item.get("role") in _MESSAGE_ROLES or item.get("type") in _MESSAGE_TYPES
 
 
-def ensure_message_ids(
-    channels: Mapping[str, Any], writes: Sequence[tuple[str, Any]]
-) -> None:
-    """Give the messages written to DeltaChannels stable ids.
+def ensure_message_ids(value: Any) -> None:
+    """Coerce message-like write values to typed BaseMessages with stable IDs.
 
-    A `DeltaChannel` replays its saved writes on every read, and its reducer
-    may not assign missing ids (`_messages_delta_reducer` doesn't), so a
-    message saved without an id comes back without one, or with a new one on
-    every read, and nothing can target it by id, for example `RemoveMessage`.
+    Called in put_writes() before DeltaChannel writes are submitted to the
+    checkpointer. Without this the checkpoint may store raw dicts or id=None
+    BaseMessages; every get_state() replay then produces a different UUID and
+    the same message appears with a different ID in each LangSmith trace.
 
-    In a channel whose reducer is `_messages_delta_reducer`, every message-like
-    it accepts (a message, a dict, a string, a `(role, content)` tuple; alone,
-    in a list or in an `Overwrite`) becomes a message with an id. Other
-    DeltaChannels may hold other data, so there only message objects get ids,
-    plus message dicts outside an `Overwrite`: one in a list becomes a message.
-    Anything that can't become a message is left as it is, so it fails where
-    it always has: a message dict in a list raises here, anything else when
-    the reducer reads it. An empty id counts as missing.
+    Handles three input shapes:
+    - BaseMessage objects: assign a UUID if id is None.
+    - Dicts with a known "role" (OpenAI-style) or "type" (LangChain format) at
+      the root level: stamp "id" into the dict in-place. The reducer's
+      convert_to_messages call will forward the id to the resulting BaseMessage.
+    - Lists of the above: apply the same logic to each element, replacing dict
+      items with coerced BaseMessages so the shared list reference seen by
+      checkpoint_pending_writes and the background thread both get typed messages.
 
-    A write that changes is replaced in `writes`: lists and dicts the caller
-    passed in are never changed, only the ids of message objects.
+    Mutating synchronously here (before the background thread is submitted) is
+    safe: the serialised bytes always reflect the post-coercion state.
     """
-    for i, (ch, value) in enumerate(writes):
-        spec = channels.get(ch)
-        if not isinstance(spec, DeltaChannel):
-            continue
-        if spec.reducer is _messages_delta_reducer:
-            new_value = _with_message_ids(value)
-        else:
-            new_value = _with_base_message_ids(value)
-        if new_value is not value:
-            cast(MutableSequence[tuple[str, Any]], writes)[i] = (ch, new_value)
-
-
-def _with_message_ids(value: Any) -> Any:
-    is_overwrite, overwrite_value = _get_overwrite(value)
-    if not is_overwrite:
-        if isinstance(value, list):
-            return _map_messages(value, _list_item_with_id)
-        return _message_with_id(value)
-    if isinstance(overwrite_value, (list, tuple)):
-        items = _map_messages(overwrite_value, _message_with_id)
-        if items is not overwrite_value:
-            return Overwrite(items)
-    return value
-
-
-def _with_base_message_ids(value: Any) -> Any:
-    is_overwrite, overwrite_value = _get_overwrite(value)
-    if is_overwrite:
-        if isinstance(overwrite_value, (list, tuple)):
-            for item in overwrite_value:
-                _stamp_message_id(item)
-        return value
-    if isinstance(value, list):
-        return _map_messages(value, _base_list_item_with_id)
-    if isinstance(value, dict) and _is_message_dict(value) and not value.get("id"):
-        return {**value, "id": str(uuid4())}
-    _stamp_message_id(value)
-    return value
-
-
-def _map_messages(items: list | tuple, fn: Callable[[Any], Any]) -> list | tuple:
-    mapped = [fn(item) for item in items]
-    if all(new is old for new, old in zip(mapped, items)):
-        return items
-    return mapped if isinstance(items, list) else tuple(mapped)
-
-
-def _list_item_with_id(item: Any) -> Any:
-    if isinstance(item, dict) and _is_message_dict(item):
-        return _message_with_id(item, strict=True)
-    return _message_with_id(item)
-
-
-def _base_list_item_with_id(item: Any) -> Any:
-    if isinstance(item, dict) and _is_message_dict(item):
-        return _message_with_id(item, strict=True)
-    _stamp_message_id(item)
-    return item
-
-
-def _message_with_id(item: Any, *, strict: bool = False) -> Any:
-    if isinstance(item, BaseMessage):
-        _stamp_message_id(item)
-        return item
-    try:
-        message = convert_to_messages([item])[0]
-    except Exception:
-        if strict:
-            raise
-        return item
-    if not message.id:
-        message.id = str(uuid4())
-    return message
-
-
-def _stamp_message_id(item: Any) -> None:
-    if isinstance(item, BaseMessage) and item.id is None:
-        item.id = str(uuid4())
+    if isinstance(value, BaseMessage):
+        if value.id is None:
+            value.id = str(uuid4())
+    elif isinstance(value, dict) and _is_message_dict(value):
+        if not value.get("id"):
+            value["id"] = str(uuid4())
+    elif isinstance(value, list):
+        for i, item in enumerate(value):
+            if isinstance(item, BaseMessage):
+                if item.id is None:
+                    item.id = str(uuid4())
+            elif isinstance(item, dict) and _is_message_dict(item):
+                msg = convert_to_messages([item])[0]
+                if msg.id is None:
+                    msg.id = str(uuid4())
+                value[i] = msg

libs/langgraph/langgraph/pregel/_retry.py

@@ -7,7 +7,7 @@ import sys
 import threading
 import time
 import weakref
-from collections.abc import Callable, Sequence
+from collections.abc import Awaitable, Callable, Sequence
 from contextlib import suppress
 from dataclasses import dataclass, replace
 from datetime import datetime, timedelta, timezone
@@ -686,6 +686,8 @@ async def arun_with_retry(
     task: PregelExecutableTask,
     retry_policy: Sequence[RetryPolicy] | None,
     stream: bool = False,
+    match_cached_writes: Callable[[], Awaitable[Sequence[PregelExecutableTask]]]
+    | None = None,
     configurable: dict[str, Any] | None = None,
 ) -> None:
     """Run a task asynchronously with retries."""
@@ -709,6 +711,11 @@ async def arun_with_retry(
                 )
             },
         )
+    if match_cached_writes is not None and task.cache_key is not None:
+        for t in await match_cached_writes():
+            if t is task:
+                # if the task is already cached, return
+                return
     while True:
         runtime = config.get(CONF, {}).get(CONFIG_KEY_RUNTIME)
         if isinstance(runtime, Runtime):

libs/langgraph/langgraph/pregel/_runner.py

@@ -41,11 +41,10 @@ from langgraph._internal._future import chain_future, run_coroutine_threadsafe
 from langgraph._internal._scratchpad import PregelScratchpad
 from langgraph._internal._typing import MISSING
 from langgraph.constants import TAG_HIDDEN
-from langgraph.errors import GraphBubbleUp, GraphInterrupt, is_invalid_resume
+from langgraph.errors import GraphBubbleUp, GraphInterrupt
 from langgraph.pregel._algo import Call
 from langgraph.pregel._executor import Submit
 from langgraph.pregel._retry import arun_with_retry, run_with_retry
-from langgraph.pregel._task_status import CONTROL_WRITES
 from langgraph.types import (
     CachePolicy,
     PregelExecutableTask,
@@ -607,9 +606,8 @@ class PregelRunner:
                 task.config is None or TAG_HIDDEN not in task.config.get("tags", [])
             ):
                 self.node_finished(task.name)
-            if all(chan in CONTROL_WRITES for chan, _ in task.writes):
-                # record that the task finished, even if it produced no output
-                # (see `langgraph.pregel._task_status`)
+            if not task.writes:
+                # add no writes marker
                 task.writes.append((NO_WRITES, None))
             # save task writes to checkpointer
             self.put_writes()(task.id, task.writes)  # type: ignore[misc]
@@ -621,11 +619,7 @@ def _should_stop_others(
     handled_exception_ids: set[int] | None = None,
 ) -> bool:
     """Check if any task failed, if so, cancel all other tasks.
-    GraphInterrupts are not considered failures.
-
-    Neither is an invalid resume value: it's raised once the other tasks finish, so a
-    task answered in the same resume isn't cut off after its side effects and then run
-    again with its saved answer."""
+    GraphInterrupts are not considered failures."""
     for fut in done:
         if fut.cancelled():
             continue
@@ -633,7 +627,6 @@ def _should_stop_others(
             if (
                 id(exc) not in (handled_exception_ids or set())
                 and not isinstance(exc, GraphBubbleUp)
-                and not is_invalid_resume(exc)
                 and fut not in SKIP_RERAISE_SET
             ):
                 return True

libs/langgraph/langgraph/pregel/_task_status.py

@@ -1,129 +0,0 @@
-"""Read the status of each task from the writes recorded for a superstep.
-
-While a superstep is open, the checkpointer keeps a log of writes for each
-task in that step. Entries are added as tasks run and are only discarded when
-the whole superstep finishes and a new checkpoint is saved. When a task runs
-again, for example after being resumed, its earlier entries stay in the log.
-
-This module is the single place that turns that log into task status. Code that
-needs to know whether a task finished, which interrupts it raised, which of them
-are still waiting for an answer, or which output it produced must use
-`read_task_statuses` instead of inspecting the writes directly.
-
-The log uses two kinds of writes:
-
-- Control writes describe what happened to a task: `INTERRUPT` (the task asked
-  a question), `RESUME` (answers the task has received), `ERROR`, and
-  `ERROR_SOURCE_NODE`. `INTERRUPT`, `RESUME` and `ERROR` each have a fixed slot
-  per task (`WRITES_IDX_MAP`), so a newer write of the same kind can replace an
-  older one.
-- Every other write is output: channel writes, `RETURN` for functional tasks,
-  and the `NO_WRITES` marker.
-
-The rules are:
-
-1. When a task that ran finishes successfully, `PregelRunner.commit` records at
-   least one output write, adding `NO_WRITES` if the task produced no other
-   output.
-2. A task that pauses at an interrupt records only control writes.
-3. A task is therefore treated as finished if and only if it has an output
-   write.
-4. Because `INTERRUPT` is stored in a fixed slot, its recorded value is the most
-   recent question the task asked. That question is waiting for an answer only
-   while the task is unfinished.
-
-A `RESUME` write never means a task is finished: it can hold the answer to an
-earlier question while the task waits on a later one.
-
-What these rules cannot see:
-
-- A task whose result came from the cache does not go through
-  `PregelRunner.commit`, so nothing is recorded for it. It reads as not
-  finished.
-- A task that fails can record partial output writes along with its error. It
-  reads as finished, which is how the executor has always treated it.
-- Writes recorded before rule 1 existed may describe a finished task with no
-  output using only control writes. Those tasks read as unfinished. The
-  executor treated them the same way before and runs them again. Their last
-  interrupt now counts as pending, so they appear in `next` and a resume
-  without an interrupt id raises if another interrupt is also pending.
-"""
-
-from __future__ import annotations
-
-from collections.abc import Iterable, Sequence
-from dataclasses import dataclass
-from typing import Any
-
-from langgraph.checkpoint.base import PendingWrite
-
-from langgraph._internal._constants import (
-    ERROR,
-    ERROR_SOURCE_NODE,
-    INTERRUPT,
-    NULL_TASK_ID,
-    RESUME,
-)
-from langgraph.types import Interrupt
-
-__all__ = ("CONTROL_WRITES", "TaskStatus", "read_task_statuses")
-
-CONTROL_WRITES = frozenset((ERROR, ERROR_SOURCE_NODE, INTERRUPT, RESUME))
-"""Channels that describe what happened to a task rather than what it produced."""
-
-
-@dataclass(frozen=True, slots=True)
-class TaskStatus:
-    """The status of one task, read from the writes recorded for its superstep."""
-
-    output: tuple[tuple[str, Any], ...] = ()
-    """Output writes in recorded order. Empty if the task has not finished."""
-
-    interrupts: tuple[Interrupt, ...] = ()
-    """The most recent interrupts the task raised, whether or not they were answered."""
-
-    error: BaseException | None = None
-    """The recorded error, if any."""
-
-    @property
-    def finished(self) -> bool:
-        """Whether the task ran to completion."""
-        return bool(self.output)
-
-    @property
-    def pending_interrupts(self) -> tuple[Interrupt, ...]:
-        """Interrupts waiting for an answer. Always empty for a finished task."""
-        return () if self.finished else self.interrupts
-
-
-def read_task_statuses(
-    pending_writes: Iterable[PendingWrite],
-) -> dict[str, TaskStatus]:
-    """Return the status of every task that has recorded writes, keyed by task id.
-
-    Writes from `NULL_TASK_ID` are input to the superstep, not task activity, so
-    they are not included.
-    """
-    output: dict[str, list[tuple[str, Any]]] = {}
-    interrupts: dict[str, list[Interrupt]] = {}
-    errors: dict[str, BaseException] = {}
-    for task_id, channel, value in pending_writes:
-        if task_id == NULL_TASK_ID:
-            continue
-        output.setdefault(task_id, [])
-        if channel == INTERRUPT:
-            interrupts.setdefault(task_id, []).extend(
-                value if isinstance(value, Sequence) else [value]
-            )
-        elif channel == ERROR:
-            errors.setdefault(task_id, value)
-        elif channel not in CONTROL_WRITES:
-            output[task_id].append((channel, value))
-    return {
-        task_id: TaskStatus(
-            output=tuple(task_output),
-            interrupts=tuple(interrupts.get(task_id, ())),
-            error=errors.get(task_id),
-        )
-        for task_id, task_output in output.items()
-    }

libs/langgraph/langgraph/pregel/_utils.py

@@ -1,10 +1,11 @@
 from __future__ import annotations
 
-import dis
+import ast
+import inspect
 import re
+import textwrap
 from collections.abc import Callable, Sequence
 from functools import partial
-from types import CodeType, FunctionType
 from typing import Any
 
 from langchain_core.runnables import (
@@ -16,6 +17,7 @@ from langchain_core.runnables import (
 from langchain_core.runnables.base import RunnableBindingBase
 from langchain_core.runnables.config import run_in_executor
 from langgraph.checkpoint.base import ChannelVersions
+from typing_extensions import override
 
 from langgraph._internal._runnable import RunnableCallable, RunnableSeq
 from langgraph._internal._timeout import sync_timeout_unsupported
@@ -135,87 +137,155 @@ def validate_timeout_supported(runnable: Runnable, *, name: str) -> None:
         raise sync_timeout_unsupported(name)
 
 
-# Values treated as dead ends when deciding whether to walk a function's
-# bytecode. A container can hold a graph, but `find_subgraph_pregel` does not
-# look inside one, so skipping it costs nothing while that holds. Matched by
-# exact type, since a subclass of a builtin can carry attributes.
-_LEAF_TYPES = frozenset(
-    {
-        int,
-        float,
-        complex,
-        bool,
-        str,
-        bytes,
-        bytearray,
-        list,
-        tuple,
-        dict,
-        set,
-        frozenset,
-        type(None),
-    }
-)
-
-
 def get_function_nonlocals(func: Callable) -> list[Any]:
-    """Get the values a function reaches from outside its own scope.
+    """Get the nonlocal variables accessed by a function.
 
     Args:
         func: The function to check.
 
     Returns:
-        Every captured cell value, the globals the function names, and each
-        value along an attribute path it loads. Over-approximates: a value can
-        come back without the function reaching it at runtime.
+        List[Any]: The nonlocal variables accessed by the function.
     """
-    func = getattr(func, "__func__", func)  # bound method -> function
-    wrapped = getattr(func, "__wrapped__", None)
-    if callable(wrapped):
-        func = getattr(wrapped, "__func__", wrapped)
-    if not isinstance(func, FunctionType):
+    try:
+        code = inspect.getsource(func)
+        tree = ast.parse(textwrap.dedent(code))
+        visitor = FunctionNonLocals()
+        visitor.visit(tree)
+        values: list[Any] = []
+        closure = (
+            inspect.getclosurevars(func.__wrapped__)
+            if hasattr(func, "__wrapped__") and callable(func.__wrapped__)
+            else inspect.getclosurevars(func)
+        )
+        candidates = {**closure.globals, **closure.nonlocals}
+        for k, v in candidates.items():
+            if k in visitor.nonlocals:
+                values.append(v)
+            for kk in visitor.nonlocals:
+                if "." in kk and kk.startswith(k):
+                    vv = v
+                    for part in kk.split(".")[1:]:
+                        if vv is None:
+                            break
+                        else:
+                            try:
+                                vv = getattr(vv, part)
+                            except AttributeError:
+                                break
+                    else:
+                        values.append(vv)
+    except (SyntaxError, TypeError, OSError, SystemError):
         return []
-    code = func.__code__
 
-    cells: dict[str, Any] = {}
-    for name, cell in zip(code.co_freevars, func.__closure__ or ()):
-        try:
-            cells[name] = cell.cell_contents
-        except ValueError:
-            continue  # empty cell: a recursive def not yet bound
-
-    # Every captured value counts, referenced or not: over-declaring costs an
-    # introspection entry, under-declaring drops the subgraph's checkpoints and
-    # stream events. Checking each cell against the bytecode would cost more and
-    # only trade the cheap error for the expensive one.
-    values: list[Any] = list(cells.values())
-    global_ns = func.__globals__
-    globals_ = {name: global_ns[name] for name in code.co_names if name in global_ns}
-    if all(type(v) in _LEAF_TYPES for v in (*cells.values(), *globals_.values())):
-        return values
-
-    # Nested code objects hold the references made by inner defs, lambdas and
-    # comprehensions, which resolve against the namespaces gathered above.
-    codes = [code]
-    for c in codes:
-        codes.extend(k for k in c.co_consts if isinstance(k, CodeType))
-        value: Any = None
-        for instruction in dis.get_instructions(c):
-            opname = instruction.opname
-            if opname == "LOAD_GLOBAL":
-                value = globals_.get(instruction.argval)
-            elif opname == "LOAD_DEREF":
-                value = cells.get(instruction.argval)
-            elif opname in ("LOAD_ATTR", "LOAD_METHOD"):
-                value = getattr(value, instruction.argval, None)
-            else:
-                value = None  # anything else ends the chain: `a, b.c` is not `a.c`
-                continue
-            if value is not None:
-                values.append(value)
     return values
 
 
+class FunctionNonLocals(ast.NodeVisitor):
+    """Get the nonlocal variables accessed of a function."""
+
+    def __init__(self) -> None:
+        self.nonlocals: set[str] = set()
+
+    @override
+    def visit_FunctionDef(self, node: ast.FunctionDef) -> Any:
+        """Visit a function definition.
+
+        Args:
+            node: The node to visit.
+
+        Returns:
+            Any: The result of the visit.
+        """
+        visitor = NonLocals()
+        visitor.visit(node)
+        self.nonlocals.update(visitor.loads - visitor.stores)
+
+    @override
+    def visit_AsyncFunctionDef(self, node: ast.AsyncFunctionDef) -> Any:
+        """Visit an async function definition.
+
+        Args:
+            node: The node to visit.
+
+        Returns:
+            Any: The result of the visit.
+        """
+        visitor = NonLocals()
+        visitor.visit(node)
+        self.nonlocals.update(visitor.loads - visitor.stores)
+
+    @override
+    def visit_Lambda(self, node: ast.Lambda) -> Any:
+        """Visit a lambda function.
+
+        Args:
+            node: The node to visit.
+
+        Returns:
+            Any: The result of the visit.
+        """
+        visitor = NonLocals()
+        visitor.visit(node)
+        self.nonlocals.update(visitor.loads - visitor.stores)
+
+
+class NonLocals(ast.NodeVisitor):
+    """Get nonlocal variables accessed."""
+
+    def __init__(self) -> None:
+        self.loads: set[str] = set()
+        self.stores: set[str] = set()
+
+    @override
+    def visit_Name(self, node: ast.Name) -> Any:
+        """Visit a name node.
+
+        Args:
+            node: The node to visit.
+
+        Returns:
+            Any: The result of the visit.
+        """
+        if isinstance(node.ctx, ast.Load):
+            self.loads.add(node.id)
+        elif isinstance(node.ctx, ast.Store):
+            self.stores.add(node.id)
+
+    @override
+    def visit_Attribute(self, node: ast.Attribute) -> Any:
+        """Visit an attribute node.
+
+        Args:
+            node: The node to visit.
+
+        Returns:
+            Any: The result of the visit.
+        """
+        if isinstance(node.ctx, ast.Load):
+            parent = node.value
+            attr_expr = node.attr
+            while isinstance(parent, ast.Attribute):
+                attr_expr = parent.attr + "." + attr_expr
+                parent = parent.value
+            if isinstance(parent, ast.Name):
+                self.loads.add(parent.id + "." + attr_expr)
+                self.loads.discard(parent.id)
+            elif isinstance(parent, ast.Call):
+                if isinstance(parent.func, ast.Name):
+                    self.loads.add(parent.func.id)
+                else:
+                    parent = parent.func
+                    attr_expr = ""
+                    while isinstance(parent, ast.Attribute):
+                        if attr_expr:
+                            attr_expr = parent.attr + "." + attr_expr
+                        else:
+                            attr_expr = parent.attr
+                        parent = parent.value
+                    if isinstance(parent, ast.Name):
+                        self.loads.add(parent.id + "." + attr_expr)
+
+
 def is_xxh3_128_hexdigest(value: str) -> bool:
     """Check if the given string matches the format of xxh3_128_hexdigest."""
     return bool(re.fullmatch(r"[0-9a-f]{32}", value))

libs/langgraph/langgraph/pregel/debug.py

@@ -26,7 +26,6 @@ from langgraph._internal._typing import MISSING
 from langgraph.channels.base import BaseChannel
 from langgraph.constants import TAG_HIDDEN
 from langgraph.pregel._io import read_channels
-from langgraph.pregel._task_status import TaskStatus, read_task_statuses
 from langgraph.types import (
     CheckpointPayload,
     PregelExecutableTask,
@@ -38,8 +37,6 @@ from langgraph.types import (
 
 TASK_NAMESPACE = UUID("6ba7b831-9dad-11d1-80b4-00c04fd430c8")
 
-_NOT_STARTED = TaskStatus()
-
 
 def map_debug_tasks(tasks: Iterable[PregelExecutableTask]) -> Iterator[TaskPayload]:
     """Produce "task" events for stream_mode=debug."""
@@ -214,21 +211,35 @@ def tasks_w_writes(
     pending_writes: list[PendingWrite] | None,
     states: dict[str, RunnableConfig | StateSnapshot] | None,
     output_keys: str | Sequence[str],
-    *,
-    live: bool = False,
 ) -> tuple[PregelTask, ...]:
-    """Apply writes / subgraph states to tasks to be returned in a StateSnapshot.
-
-    With `live=True`, tasks report only the interrupts still waiting for an
-    answer, as of the most recent writes. Otherwise tasks report the interrupts
-    they raised in the step, including answered ones, as a record of the step.
-    """
-    statuses = read_task_statuses(pending_writes or [])
+    """Apply writes / subgraph states to tasks to be returned in a StateSnapshot."""
+    pending_writes = pending_writes or []
     out: list[PregelTask] = []
     for task in tasks:
-        status = statuses.get(task.id, _NOT_STARTED)
-        rtn = next((val for chan, val in status.output if chan == RETURN), MISSING)
-        task_writes = [(chan, val) for chan, val in status.output if chan != RETURN]
+        rtn = next(
+            (
+                val
+                for tid, chan, val in pending_writes
+                if tid == task.id and chan == RETURN
+            ),
+            MISSING,
+        )
+        task_error = next(
+            (exc for tid, n, exc in pending_writes if tid == task.id and n == ERROR),
+            None,
+        )
+        task_interrupts = tuple(
+            v
+            for tid, n, vv in pending_writes
+            if tid == task.id and n == INTERRUPT
+            for v in (vv if isinstance(vv, Sequence) else [vv])
+        )
+
+        task_writes = [
+            (chan, val)
+            for tid, chan, val in pending_writes
+            if tid == task.id and chan not in (ERROR, INTERRUPT, RETURN)
+        ]
 
         if rtn is not MISSING:
             task_result = rtn
@@ -250,15 +261,19 @@ def tasks_w_writes(
             mapped_writes = map_task_result_writes(filtered_writes)
             task_result = mapped_writes if filtered_writes else {}
 
+        has_writes = rtn is not MISSING or any(
+            w[0] == task.id and w[1] not in (ERROR, INTERRUPT) for w in pending_writes
+        )
+
         out.append(
             PregelTask(
                 task.id,
                 task.name,
                 task.path,
-                status.error,
-                status.pending_interrupts if live else status.interrupts,
+                task_error,
+                task_interrupts,
                 states.get(task.id) if states else None,
-                task_result if status.finished else None,
+                task_result if has_writes else None,
             )
         )
     return tuple(out)

libs/langgraph/langgraph/pregel/protocol.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from abc import abstractmethod
 from collections.abc import AsyncIterator, Callable, Iterator, Sequence
-from typing import Any, Generic, Literal, overload
+from typing import Any, Generic, Literal, cast, overload
 
 from langchain_core.runnables import Runnable, RunnableConfig
 from langchain_core.runnables.graph import Graph as DrawableGraph
@@ -277,12 +277,12 @@ class StreamProtocol:
 
     modes: set[StreamMode]
 
-    __call__: Callable[[StreamChunk], None]
+    __call__: Callable[[Self, StreamChunk], None]
 
     def __init__(
         self,
         __call__: Callable[[StreamChunk], None],
         modes: set[StreamMode],
     ) -> None:
-        self.__call__ = __call__
+        self.__call__ = cast(Callable[[Self, StreamChunk], None], __call__)
         self.modes = modes

libs/langgraph/langgraph/stream/run_stream.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import asyncio
 from collections.abc import AsyncIterator, Awaitable, Callable, Iterator, Mapping
 from types import MappingProxyType, TracebackType
-from typing import TYPE_CHECKING, Any, NoReturn
+from typing import TYPE_CHECKING, Any
 
 from langchain_core._api import beta
 
@@ -33,26 +33,6 @@ async def _adrive_until_done(pump: Callable[[], Awaitable[bool]]) -> None:
         pass
 
 
-def _raise_missing_projection(run: object, name: str) -> NoReturn:
-    """Raise after normal attribute lookup fails for a projection.
-
-    Registered native projections are installed directly on the run instance
-    during `__init__`, so `__getattr__` is never called for them. At this point
-    the requested name is necessarily missing; the mux is inspected only to
-    include the valid registered projection names in the error message.
-
-    Read `_mux` directly from `__dict__` because it may not exist yet on a
-    partially initialized instance. Accessing `run._mux` in that case would
-    invoke `__getattr__` again and recurse indefinitely.
-    """
-    mux = run.__dict__.get("_mux")
-    registered = sorted(mux.native_keys) if mux is not None else []
-    raise AttributeError(
-        f"{type(run).__name__!r} object has no attribute {name!r} "
-        f"(registered projections: {', '.join(registered) or 'none'})"
-    )
-
-
 @beta(message="The v3 streaming protocol on Pregel is experimental.")
 class GraphRunStream:
     """Sync run stream with caller-driven pumping.
@@ -74,32 +54,15 @@ class GraphRunStream:
         experimental and may change.
     """
 
-    # Native projections, attached dynamically by the `setattr` loop in
-    # `__init__` and declared here so type checkers see them.
-    #
-    # Always registered by `stream_events(version="v3")`:
+    # Native projections always registered by `stream_events(version="v3")`.
+    # Attached dynamically by the `setattr` loop in `__init__`; declared here
+    # so type checkers see them. Opt-in native projections (`updates`,
+    # `custom`, `checkpoints`, `debug`, `tasks`) are only present when their
+    # transformer is registered, so they are reached via `extensions[...]`.
     values: StreamChannel[dict[str, Any]]
     messages: StreamChannel[ChatModelStream]
     lifecycle: StreamChannel[LifecyclePayload]
     subgraphs: StreamChannel[SubgraphRunStream]
-    # Registered on demand via `compile(transformers=...)` or
-    # `stream_events(transformers=...)`; reading one whose transformer was not
-    # registered raises AttributeError. Projections contributed by transformers
-    # outside this package are covered by `__getattr__` instead.
-    updates: StreamChannel[dict[str, Any]]
-    custom: StreamChannel[Any]
-    checkpoints: StreamChannel[dict[str, Any]]
-    debug: StreamChannel[dict[str, Any]]
-    tasks: StreamChannel[dict[str, Any]]
-
-    def __getattr__(self, name: str) -> StreamChannel[Any]:
-        """Type the projections of transformers declared outside this package.
-
-        Projection names come from a registry, so no annotation here can name
-        them all. The cost is that a misspelling type-checks too, and fails at
-        runtime instead.
-        """
-        _raise_missing_projection(self, name)
 
     def __init__(
         self,
@@ -382,24 +345,15 @@ class AsyncGraphRunStream:
         experimental and may change.
     """
 
-    # Native projections, attached dynamically by the `setattr` loop in
-    # `__init__` and declared here so type checkers see them.
-    #
-    # Always registered by `astream_events(version="v3")`:
+    # Native projections always registered by `astream_events(version="v3")`.
+    # Attached dynamically by the `setattr` loop in `__init__`; declared here
+    # so type checkers see them. Opt-in native projections (`updates`,
+    # `custom`, `checkpoints`, `debug`, `tasks`) are only present when their
+    # transformer is registered, so they are reached via `extensions[...]`.
     values: StreamChannel[dict[str, Any]]
     messages: StreamChannel[AsyncChatModelStream]
     lifecycle: StreamChannel[LifecyclePayload]
     subgraphs: StreamChannel[AsyncSubgraphRunStream]
-    # Registered on demand; see `GraphRunStream`.
-    updates: StreamChannel[dict[str, Any]]
-    custom: StreamChannel[Any]
-    checkpoints: StreamChannel[dict[str, Any]]
-    debug: StreamChannel[dict[str, Any]]
-    tasks: StreamChannel[dict[str, Any]]
-
-    def __getattr__(self, name: str) -> StreamChannel[Any]:
-        """Type projections declared elsewhere. See `GraphRunStream`."""
-        _raise_missing_projection(self, name)
 
     def __init__(
         self,

libs/langgraph/langgraph/types.py

@@ -12,23 +12,15 @@ from typing import (
     Generic,
     Literal,
     NamedTuple,
+    TypeVar,
     final,
-    overload,
 )
 from warnings import warn
 
 from langchain_core.messages import AnyMessage
 from langchain_core.runnables import Runnable, RunnableConfig
 from langgraph.checkpoint.base import BaseCheckpointSaver, CheckpointMetadata
-from pydantic import TypeAdapter, ValidationError
-from typing_extensions import (
-    NotRequired,
-    TypeAliasType,
-    TypedDict,
-    TypeVar,
-    Unpack,
-    deprecated,
-)
+from typing_extensions import NotRequired, TypeAliasType, TypedDict, Unpack, deprecated
 from xxhash import xxh3_128_hexdigest
 
 from langgraph._internal._cache import default_cache_key
@@ -44,7 +36,6 @@ from langgraph.warnings import LangGraphDeprecatedSinceV10, LangGraphDeprecatedS
 # when used in standalone type aliases.
 StateT = TypeVar("StateT")
 OutputT = TypeVar("OutputT")
-ResponseT = TypeVar("ResponseT", default=Any)
 
 if TYPE_CHECKING:
     from langgraph.pregel.protocol import PregelProtocol
@@ -581,7 +572,7 @@ _DEFAULT_INTERRUPT_ID = "placeholder-id"
 
 @final
 @dataclass(init=False, slots=True)
-class Interrupt(Generic[ResponseT]):
+class Interrupt:
     """Information about an interrupt that occurred in a node.
 
     !!! version-added "Added in version 0.2.24"
@@ -605,22 +596,13 @@ class Interrupt(Generic[ResponseT]):
     id: str
     """The ID of the interrupt. Can be used to resume the interrupt directly."""
 
-    response_schema: type[ResponseT] | dict[str, Any] | None = None
-    """Schema for the value expected when resuming this interrupt, if the graph provided one.
-
-    A surfaced interrupt carries JSON Schema (a `dict`); `type[ResponseT]` records the
-    Python type at construction so `Interrupt[Decision]` is meaningful to type checkers."""
-
     def __init__(
         self,
         value: Any,
         id: str = _DEFAULT_INTERRUPT_ID,
-        *,
-        response_schema: type[ResponseT] | dict[str, Any] | None = None,
         **deprecated_kwargs: Unpack[DeprecatedKwargs],
     ) -> None:
         self.value = value
-        self.response_schema = response_schema
 
         if (
             (ns := deprecated_kwargs.get("ns", MISSING)) is not MISSING
@@ -632,18 +614,8 @@ class Interrupt(Generic[ResponseT]):
             self.id = id
 
     @classmethod
-    def from_ns(
-        cls,
-        value: Any,
-        ns: str,
-        *,
-        response_schema: type[ResponseT] | dict[str, Any] | None = None,
-    ) -> Interrupt[ResponseT]:
-        return cls(
-            value=value,
-            id=xxh3_128_hexdigest(ns.encode()),
-            response_schema=response_schema,
-        )
+    def from_ns(cls, value: Any, ns: str) -> Interrupt:
+        return cls(value=value, id=xxh3_128_hexdigest(ns.encode()))
 
     @property
     @deprecated("`interrupt_id` is deprecated. Use `id` instead.", category=None)
@@ -726,13 +698,7 @@ class StateSnapshot(NamedTuple):
     tasks: tuple[PregelTask, ...]
     """Tasks to execute in this step. If already attempted, may contain an error."""
     interrupts: tuple[Interrupt, ...]
-    """Interrupts that occurred in this step.
-
-    When reading the latest state (`get_state` without a `checkpoint_id`), this
-    contains only interrupts still waiting for an answer. When reading a specific
-    checkpoint or state history, it contains the most recent interrupt each task
-    raised in that step, including ones answered later in the same step.
-    """
+    """Interrupts that occurred in this step that are pending resolution."""
 
 
 class Send:
@@ -882,27 +848,7 @@ class Command(Generic[N], ToolOutputMixin):
     PARENT: ClassVar[Literal["__parent__"]] = "__parent__"
 
 
-def _validate_resume(adapter: TypeAdapter[Any], value: Any) -> Any:
-    from langgraph.errors import _mark_invalid_resume
-
-    try:
-        return adapter.validate_python(value)
-    except ValidationError as exc:
-        _mark_invalid_resume(exc)
-        raise
-
-
-@overload
-def interrupt(value: Any, *, response_schema: type[ResponseT]) -> ResponseT: ...
-
-
-@overload
-def interrupt(value: Any, *, response_schema: dict[str, Any] | None = None) -> Any: ...
-
-
-def interrupt(
-    value: Any, *, response_schema: dict[str, Any] | type | None = None
-) -> Any:
+def interrupt(value: Any) -> Any:
     """Interrupt the graph with a resumable exception from within a node.
 
     The `interrupt` function enables human-in-the-loop workflows by pausing graph
@@ -972,7 +918,7 @@ def interrupt(
         for chunk in graph.stream({\"foo\": \"abc\"}, config):
             print(chunk)
 
-        # > {'__interrupt__': (Interrupt(value='what is your age?', id='45fda8478b2ef754419799e10992af06', response_schema=None),)}
+        # > {'__interrupt__': (Interrupt(value='what is your age?', id='45fda8478b2ef754419799e10992af06'),)}
 
         command = Command(resume=\"some input from a human!!!\")
 
@@ -985,21 +931,12 @@ def interrupt(
 
     Args:
         value: The value to surface to the client when the graph is interrupted.
-        response_schema: Optional schema for the value expected on resume, surfaced
-            to clients so they can render a typed input form. Accepts a JSON Schema
-            `dict` (used as-is, resume values are not validated), or a Pydantic model
-            class, `TypedDict`, or dataclass, which are converted to JSON Schema for
-            clients and used to validate the resume value; the validated object is
-            what `interrupt` returns.
 
     Returns:
-        Any: On subsequent invocations within the same node (same task to be precise), returns the value provided during the first invocation,
-            validated against `response_schema` when one that supports validation was given.
+        Any: On subsequent invocations within the same node (same task to be precise), returns the value provided during the first invocation
 
     Raises:
         GraphInterrupt: On the first invocation within the node, halts execution and surfaces the provided value to the client.
-        pydantic.ValidationError: When a resume value does not match a Pydantic model, `TypedDict`, or dataclass `response_schema`.
-            Nothing is saved, so the interrupt can be answered again. `is_invalid_resume` identifies it.
     """
     from langgraph._internal._constants import (
         CONFIG_KEY_CHECKPOINT_NS,
@@ -1011,36 +948,27 @@ def interrupt(
     from langgraph.errors import GraphInterrupt
 
     conf = get_config()["configurable"]
-    adapter = (
-        None
-        if response_schema is None or isinstance(response_schema, dict)
-        else TypeAdapter(response_schema)
-    )
     # track interrupt index
     scratchpad = conf[CONFIG_KEY_SCRATCHPAD]
     idx = scratchpad.interrupt_counter()
     # find previous resume values
     if scratchpad.resume:
         if idx < len(scratchpad.resume):
-            v = scratchpad.resume[idx]
-            validated = _validate_resume(adapter, v) if adapter else v
-            conf[CONFIG_KEY_SEND]([(RESUME, scratchpad.resume[: idx + 1])])
-            return validated
+            conf[CONFIG_KEY_SEND]([(RESUME, scratchpad.resume)])
+            return scratchpad.resume[idx]
     # find current resume value
     v = scratchpad.get_null_resume(True)
     if v is not None:
         assert len(scratchpad.resume) == idx, (scratchpad.resume, idx)
-        validated = _validate_resume(adapter, v) if adapter else v
         scratchpad.resume.append(v)
         conf[CONFIG_KEY_SEND]([(RESUME, scratchpad.resume)])
-        return validated
+        return v
     # no resume value found
     raise GraphInterrupt(
         (
             Interrupt.from_ns(
                 value=value,
                 ns=conf[CONFIG_KEY_CHECKPOINT_NS],
-                response_schema=adapter.json_schema() if adapter else response_schema,
             ),
         )
     )