rename

Updated logo image width in README.md from 80% to 50%.

.github/images/logo-dark.svg

@@ -0,0 +1,5 @@
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+</svg>

.github/images/logo-light.svg

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.github/workflows/_integration_test.yml

@@ -40,11 +40,12 @@ jobs:
       - uses: actions/checkout@v6
       - name: Get changed files
         id: changed-files
+        if: github.event_name != 'workflow_dispatch'
         uses: Ana06/get-changed-files@v2.3.0
         with:
           filter: "libs/cli/**"
       - name: Set up Python ${{ matrix.python-version }}
-        if: steps.changed-files.outputs.all
+        if: (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch')
         uses: astral-sh/setup-uv@v7
         with:
           python-version: ${{ matrix.python-version }}
@@ -52,15 +53,15 @@ jobs:
           cache-suffix: "cli-integration-test"
           ignore-nothing-to-cache: true
       - name: Install cli globally
-        if: steps.changed-files.outputs.all
+        if: (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch')
         run: pip install -e .
       - name: Build service ${{ matrix.example.name }}
-        if: steps.changed-files.outputs.all
+        if: (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch')
         working-directory: ${{ matrix.example.workdir }}
         run: |
           langgraph build -t ${{ matrix.example.tag }}
       - name: Test service ${{ matrix.example.name }}
-        if: ${{ steps.changed-files.outputs.all && env.HAS_LANGSMITH_API_KEY == 'true' }}
+        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&env.HAS_LANGSMITH_API_KEY == 'true' }}
         working-directory: ${{ matrix.example.workdir }}
         env:
           LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY }}
@@ -74,24 +75,24 @@ jobs:
           timeout 60 python "$REPO_ROOT/.github/scripts/run_langgraph_cli_test.py" -t ${{ matrix.example.tag }}
 
       - name: Build JS service
-        if: ${{ steps.changed-files.outputs.all && matrix.example.name == 'A' }}
+        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
         working-directory: libs/cli/js-examples
         run: |
           langgraph build -t langgraph-test-e
 
       - name: Build JS monorepo service
-        if: ${{ steps.changed-files.outputs.all && matrix.example.name == 'A' }}
+        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
         working-directory: libs/cli/js-monorepo-example
         run: |
           langgraph build -t langgraph-test-f -c apps/agent/langgraph.json --build-command "yarn run turbo build" --install-command "yarn install"
 
       - name: Build Python monorepo service
-        if: ${{ steps.changed-files.outputs.all && matrix.example.name == 'A' }}
+        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
         working-directory: libs/cli/python-monorepo-example
         run: |
           langgraph build -t langgraph-test-g -c apps/agent/langgraph.json
       - name: Test Python monorepo service
-        if: ${{ steps.changed-files.outputs.all && matrix.example.name == 'A' && env.HAS_LANGSMITH_API_KEY == 'true' }}
+        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' && env.HAS_LANGSMITH_API_KEY == 'true' }}
         working-directory: libs/cli/python-monorepo-example
         env:
           LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY }}
@@ -101,12 +102,12 @@ jobs:
           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 && matrix.example.name == 'A' }}
+        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
         working-directory: libs/cli/examples/graph_prerelease_reqs
         run: |
           langgraph build -t langgraph-test-h
       - name: Test prerelease reqs service
-        if: ${{ steps.changed-files.outputs.all && matrix.example.name == 'A' && env.HAS_LANGSMITH_API_KEY == 'true' }}
+        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' && env.HAS_LANGSMITH_API_KEY == 'true' }}
         working-directory: libs/cli/examples/graph_prerelease_reqs
         env:
           LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY }}
@@ -132,7 +133,7 @@ jobs:
           fi
 
       - name: Build and test prerelease reqs fail service
-        if: ${{ steps.changed-files.outputs.all && matrix.example.name == 'A' }}
+        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
         working-directory: libs/cli/examples/graph_prerelease_reqs_fail
         run: |
           langgraph build -t langgraph-test-i || [ $? -eq 1 ]

.github/workflows/_lint.yml

@@ -34,11 +34,12 @@ jobs:
       - uses: actions/checkout@v6
       - name: Get changed files
         id: changed-files
+        if: github.event_name != 'workflow_dispatch'
         uses: Ana06/get-changed-files@v2.3.0
         with:
           filter: "${{ inputs.working-directory }}/**"
       - name: Set up Python ${{ matrix.python-version }}
-        if: steps.changed-files.outputs.all
+        if: steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch'
         uses: astral-sh/setup-uv@v7
         with:
           python-version: ${{ matrix.python-version }}
@@ -46,12 +47,12 @@ jobs:
           cache-suffix: lint-${{ inputs.working-directory }}
 
       - name: Install dependencies
-        if: steps.changed-files.outputs.all
+        if: steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch'
         working-directory: ${{ inputs.working-directory }}
         run: uv sync --frozen --group lint
 
       - name: Get .mypy_cache to speed up mypy
-        if: steps.changed-files.outputs.all
+        if: steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch'
         uses: actions/cache@v5
         env:
           SEGMENT_DOWNLOAD_TIMEOUT_MIN: "2"
@@ -61,7 +62,7 @@ jobs:
           key: mypy-lint-${{ runner.os }}-${{ runner.arch }}-py${{ matrix.python-version }}-${{ inputs.working-directory }}-${{ hashFiles(format('{0}/uv.lock', inputs.working-directory)) }}
 
       - name: Analysing package code with our lint
-        if: steps.changed-files.outputs.all
+        if: steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch'
         working-directory: ${{ inputs.working-directory }}
         run: |
           if make lint_package > /dev/null 2>&1; then
@@ -72,12 +73,12 @@ jobs:
           fi
 
       - name: Install test dependencies
-        if: steps.changed-files.outputs.all
+        if: steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch'
         working-directory: ${{ inputs.working-directory }}
         run: uv sync --group lint
 
       - name: Get .mypy_cache_test to speed up mypy
-        if: steps.changed-files.outputs.all
+        if: steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch'
         uses: actions/cache@v5
         env:
           SEGMENT_DOWNLOAD_TIMEOUT_MIN: "2"
@@ -87,7 +88,7 @@ jobs:
           key: mypy-test-${{ runner.os }}-${{ runner.arch }}-py${{ matrix.python-version }}-${{ inputs.working-directory }}-${{ hashFiles(format('{0}/uv.lock', inputs.working-directory)) }}
 
       - name: Analysing tests with our lint
-        if: steps.changed-files.outputs.all
+        if: steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch'
         working-directory: ${{ inputs.working-directory }}
         run: |
           if make lint_tests > /dev/null 2>&1; then

.github/workflows/_test_langgraph.yml

@@ -45,6 +45,13 @@ jobs:
         shell: bash
         run: make test_parallel
 
+      - name: Run strict msgpack pregel tests
+        if: ${{ matrix.python-version == '3.13' }}
+        shell: bash
+        env:
+          LANGGRAPH_STRICT_MSGPACK: "true"
+        run: make test TEST="tests/test_pregel.py tests/test_pregel_async.py"
+
       - name: Ensure the tests did not create any additional files
         shell: bash
         run: |

.github/workflows/ci.yml

@@ -2,10 +2,12 @@
 name: CI
 
 on:
+  workflow_dispatch:
   push:
     branches:
       - main
   pull_request:
+  
 
 permissions:
   contents: read
@@ -24,11 +26,12 @@ jobs:
   changes:
     runs-on: ubuntu-latest
     outputs:
-      python: ${{ steps.filter.outputs.python }}
-      deps: ${{ steps.filter.outputs.deps }}
+      python: ${{ steps.filter.outputs.python || 'true' }}
+      deps: ${{ steps.filter.outputs.deps || 'true' }}
     steps:
       - uses: actions/checkout@v6
       - uses: dorny/paths-filter@v3
+        if: github.event_name != 'workflow_dispatch'
         id: filter
         with:
           filters: |

.github/workflows/deploy-redirects.yml

@@ -0,0 +1,49 @@
+name: Deploy Redirects to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'docs/**'
+      - '.github/workflows/deploy-redirects.yml'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Setup Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.11'
+
+      - name: Generate redirect files
+        run: python docs/generate_redirects.py
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v4
+        with:
+          path: 'docs/_site'
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

README.md

@@ -1,7 +1,7 @@
 <picture class="github-only">
-  <source media="(prefers-color-scheme: light)" srcset="https://langchain-ai.github.io/langgraph/static/wordmark_dark.svg">
-  <source media="(prefers-color-scheme: dark)" srcset="https://langchain-ai.github.io/langgraph/static/wordmark_light.svg">
-  <img alt="LangGraph Logo" src="https://langchain-ai.github.io/langgraph/static/wordmark_dark.svg" width="80%">
+  <source media="(prefers-color-scheme: light)" srcset=".github/images/logo-light.svg">
+  <source media="(prefers-color-scheme: dark)" srcset=".github/images/logo-dark.svg">
+  <img alt="LangGraph Logo" src=".github/images/logo-dark.svg" width="50%">
 </picture>
 
 <div>
@@ -56,6 +56,9 @@ Get started with the [LangGraph Quickstart](https://docs.langchain.com/oss/pytho
 
 To quickly build agents with LangChain's `create_agent` (built on LangGraph), see the [LangChain Agents documentation](https://docs.langchain.com/oss/python/langchain/agents).
 
+> [!TIP]
+> For developing, debugging, and deploying AI agents and LLM applications, see [LangSmith](https://docs.langchain.com/langsmith/home).
+
 ## Core benefits
 
 LangGraph provides low-level supporting infrastructure for *any* long-running, stateful workflow or agent. LangGraph does not abstract prompts or architecture, and provides the following central benefits:

docs/.gitignore

@@ -0,0 +1 @@
+_site/

docs/generate_redirects.py

@@ -0,0 +1,142 @@
+#!/usr/bin/env python3
+"""
+Generate HTML redirect files from redirects.json.
+
+Usage:
+    python generate_redirects.py
+
+This script reads redirects.json and generates individual HTML files
+for each redirect path. Each HTML file uses meta refresh (0 delay)
+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 json
+import os
+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"
+
+HTML_TEMPLATE = """<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Redirecting...</title>
+    <link rel="canonical" href="{url}">
+    <meta name="robots" content="noindex">
+    <script>var anchor=window.location.hash.substr(1);location.href="{url}"+(anchor?"#"+anchor:"")</script>
+    <meta http-equiv="refresh" content="0; url={url}">
+</head>
+<body>
+Redirecting...
+</body>
+</html>
+"""
+
+ROOT_HTML_TEMPLATE = """<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Redirecting to LangGraph Documentation</title>
+    <link rel="canonical" href="{url}">
+    <meta name="robots" content="noindex">
+    <script>var anchor=window.location.hash.substr(1);location.href="{url}"+(anchor?"#"+anchor:"")</script>
+    <meta http-equiv="refresh" content="0; url={url}">
+</head>
+<body>
+<h1>Documentation has moved</h1>
+<p>The LangGraph documentation has moved to <a href="{url}">docs.langchain.com</a>.</p>
+<p>Redirecting you now...</p>
+</body>
+</html>
+"""
+
+CATCHALL_404_TEMPLATE = """<!doctype html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title>Redirecting to LangGraph Documentation</title>
+    <link rel="canonical" href="{default_url}">
+    <meta name="robots" content="noindex">
+    <script>
+        // Catchall redirect for any unmapped paths
+        window.location.replace("{default_url}");
+    </script>
+    <meta http-equiv="refresh" content="0; url={default_url}">
+</head>
+<body>
+<h1>Documentation has moved</h1>
+<p>The LangGraph documentation has moved to <a href="{default_url}">docs.langchain.com</a>.</p>
+<p>Redirecting you now...</p>
+</body>
+</html>
+"""
+
+
+def generate_redirects():
+    script_dir = Path(__file__).parent
+    output_dir = script_dir / "_site"
+
+    # Load redirects
+    with open(script_dir / "redirects.json") as f:
+        redirects = json.load(f)
+
+    # Clean output directory
+    if output_dir.exists():
+        import shutil
+        shutil.rmtree(output_dir)
+    output_dir.mkdir(parents=True)
+
+    # Generate individual HTML files for each redirect
+    for old_path, new_url in redirects.items():
+        # Remove leading slash and create directory structure
+        path = old_path.lstrip("/")
+
+        # Check if path has a file extension (e.g., .txt, .xml)
+        # If so, create the file directly instead of a directory with index.html
+        path_obj = Path(path)
+        has_extension = path_obj.suffix and len(path_obj.suffix) <= 5
+
+        if not path:
+            html_path = output_dir / "index.html"
+        elif has_extension:
+            # For files with extensions, create the file directly
+            html_path = output_dir / path
+        else:
+            # For directory-style URLs, create index.html inside
+            html_path = output_dir / path / "index.html"
+
+        # Create parent directories
+        html_path.parent.mkdir(parents=True, exist_ok=True)
+
+        # Write the redirect HTML
+        html_path.write_text(HTML_TEMPLATE.format(url=new_url))
+        print(f"Created: {html_path}")
+
+    # Create root index.html
+    root_index = output_dir / "index.html"
+    if not root_index.exists():
+        root_index.write_text(ROOT_HTML_TEMPLATE.format(url=DEFAULT_REDIRECT))
+        print(f"Created: {root_index}")
+
+    # Create 404.html for catchall
+    catchall_404 = output_dir / "404.html"
+    catchall_404.write_text(CATCHALL_404_TEMPLATE.format(default_url=DEFAULT_REDIRECT))
+    print(f"Created: {catchall_404}")
+
+    # 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():
+            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}")
+
+
+if __name__ == "__main__":
+    generate_redirects()

docs/llms.txt

@@ -0,0 +1,35 @@
+# LangGraph
+
+LangGraph documentation has moved to docs.langchain.com.
+
+## Overview
+
+- [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).

docs/redirects.json

@@ -0,0 +1,296 @@
+{
+  "/how-tos/stream-values": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/how-tos/stream-updates": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/how-tos/streaming-content": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/how-tos/stream-multiple": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/how-tos/streaming-tokens-without-langchain": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/how-tos/streaming-from-final-node": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/how-tos/streaming-events-from-within-tools-without-langchain": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/how-tos/state-reducers": "https://docs.langchain.com/oss/python/langgraph/graph-api#define-and-update-state",
+  "/how-tos/sequence": "https://docs.langchain.com/oss/python/langgraph/graph-api#create-a-sequence-of-steps",
+  "/how-tos/branching": "https://docs.langchain.com/oss/python/langgraph/graph-api#create-branches",
+  "/how-tos/recursion-limit": "https://docs.langchain.com/oss/python/langgraph/graph-api#create-and-control-loops",
+  "/how-tos/visualization": "https://docs.langchain.com/oss/python/langgraph/graph-api#visualize-your-graph",
+  "/how-tos/input_output_schema": "https://docs.langchain.com/oss/python/langgraph/graph-api#define-input-and-output-schemas",
+  "/how-tos/pass_private_state": "https://docs.langchain.com/oss/python/langgraph/graph-api#pass-private-state-between-nodes",
+  "/how-tos/state-model": "https://docs.langchain.com/oss/python/langgraph/graph-api#use-pydantic-models-for-graph-state",
+  "/how-tos/map-reduce": "https://docs.langchain.com/oss/python/langgraph/graph-api#map-reduce-and-the-send-api",
+  "/how-tos/command": "https://docs.langchain.com/oss/python/langgraph/graph-api#combine-control-flow-and-state-updates-with-command",
+  "/how-tos/configuration": "https://docs.langchain.com/oss/python/langgraph/graph-api#add-runtime-configuration",
+  "/how-tos/node-retries": "https://docs.langchain.com/oss/python/langgraph/graph-api#add-retry-policies",
+  "/how-tos/return-when-recursion-limit-hits": "https://docs.langchain.com/oss/python/langgraph/graph-api#impose-a-recursion-limit",
+  "/how-tos/async": "https://docs.langchain.com/oss/python/langgraph/graph-api#async",
+  "/how-tos/memory/manage-conversation-history": "https://docs.langchain.com/oss/python/langgraph/add-memory",
+  "/how-tos/memory/delete-messages": "https://docs.langchain.com/oss/python/langgraph/add-memory#delete-messages",
+  "/how-tos/memory/add-summary-conversation-history": "https://docs.langchain.com/oss/python/langgraph/add-memory#summarize-messages",
+  "/how-tos/memory": "https://docs.langchain.com/oss/python/langgraph/add-memory",
+  "/agents/memory": "https://docs.langchain.com/oss/python/langgraph/add-memory",
+  "/how-tos/subgraph-transform-state": "https://docs.langchain.com/oss/python/langgraph/use-subgraphs#different-state-schemas",
+  "/how-tos/subgraphs-manage-state": "https://docs.langchain.com/oss/python/langgraph/use-subgraphs#add-persistence",
+  "/how-tos/persistence_postgres": "https://docs.langchain.com/oss/python/langgraph/add-memory#use-in-production",
+  "/how-tos/persistence_mongodb": "https://docs.langchain.com/oss/python/langgraph/add-memory#use-in-production",
+  "/how-tos/persistence_redis": "https://docs.langchain.com/oss/python/langgraph/add-memory#use-in-production",
+  "/how-tos/subgraph-persistence": "https://docs.langchain.com/oss/python/langgraph/add-memory#use-with-subgraphs",
+  "/how-tos/cross-thread-persistence": "https://docs.langchain.com/oss/python/langgraph/add-memory#add-long-term-memory",
+  "/cloud/how-tos/copy_threads": "https://docs.langchain.com/langsmith/use-threads",
+  "/cloud/how-tos/check-thread-status": "https://docs.langchain.com/langsmith/use-threads",
+  "/cloud/concepts/threads": "https://docs.langchain.com/oss/python/langgraph/persistence#threads",
+  "/how-tos/persistence": "https://docs.langchain.com/oss/python/langgraph/add-memory",
+  "/how-tos/tool-calling-errors": "https://docs.langchain.com/oss/python/langgraph/workflows-agents",
+  "/how-tos/pass-config-to-tools": "https://docs.langchain.com/oss/python/langgraph/workflows-agents",
+  "/how-tos/pass-run-time-values-to-tools": "https://docs.langchain.com/oss/python/langgraph/workflows-agents",
+  "/how-tos/update-state-from-tools": "https://docs.langchain.com/oss/python/langgraph/workflows-agents",
+  "/agents/tools": "https://docs.langchain.com/oss/python/langgraph/workflows-agents",
+  "/how-tos/agent-handoffs": "https://docs.langchain.com/oss/python/langgraph/graph-api",
+  "/how-tos/multi-agent-network": "https://docs.langchain.com/oss/python/langgraph/graph-api",
+  "/how-tos/multi-agent-multi-turn-convo": "https://docs.langchain.com/oss/python/langgraph/graph-api",
+  "/cloud/index": "https://docs.langchain.com/oss/python/langgraph/overview",
+  "/cloud/how-tos/index": "https://docs.langchain.com/langsmith/home",
+  "/cloud/concepts/api": "https://docs.langchain.com/langsmith/agent-server",
+  "/cloud/concepts/cloud": "https://docs.langchain.com/langsmith/cloud",
+  "/cloud/faq/studio": "https://docs.langchain.com/langsmith/studio",
+  "/cloud/how-tos/human_in_the_loop_edit_state": "https://docs.langchain.com/langsmith/add-human-in-the-loop",
+  "/cloud/how-tos/human_in_the_loop_user_input": "https://docs.langchain.com/langsmith/add-human-in-the-loop",
+  "/concepts/platform_architecture": "https://docs.langchain.com/langsmith/cloud#architecture",
+  "/cloud/how-tos/stream_values": "https://docs.langchain.com/langsmith/streaming",
+  "/cloud/how-tos/stream_updates": "https://docs.langchain.com/langsmith/streaming",
+  "/cloud/how-tos/stream_messages": "https://docs.langchain.com/langsmith/streaming",
+  "/cloud/how-tos/stream_events": "https://docs.langchain.com/langsmith/streaming",
+  "/cloud/how-tos/stream_debug": "https://docs.langchain.com/langsmith/streaming",
+  "/cloud/how-tos/stream_multiple": "https://docs.langchain.com/langsmith/streaming",
+  "/cloud/concepts/streaming": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/agents/streaming": "https://docs.langchain.com/oss/python/langgraph/streaming",
+  "/how-tos/create-react-agent": "https://docs.langchain.com/oss/python/langchain/agents#basic-configuration",
+  "/how-tos/create-react-agent-memory": "https://docs.langchain.com/oss/python/langgraph/add-memory",
+  "/how-tos/create-react-agent-system-prompt": "https://docs.langchain.com/oss/python/langgraph/add-memory",
+  "/how-tos/create-react-agent-structured-output": "https://docs.langchain.com/oss/python/langchain/agents#structured-output",
+  "/prebuilt": "https://docs.langchain.com/oss/python/langchain/agents",
+  "/reference/prebuilt": "https://reference.langchain.com/python/langgraph/agents/",
+  "/concepts/high_level": "https://docs.langchain.com/oss/python/langgraph/overview",
+  "/concepts/index": "https://docs.langchain.com/oss/python/langgraph/overview",
+  "/concepts/v0-human-in-the-loop": "https://docs.langchain.com/oss/python/langgraph/interrupts",
+  "/how-tos/index": "https://docs.langchain.com/oss/python/langgraph/overview",
+  "/tutorials/introduction": "https://docs.langchain.com/oss/python/langgraph/overview",
+  "/agents/deployment": "https://docs.langchain.com/oss/python/langgraph/local-server",
+  "/how-tos/deploy-self-hosted": "https://docs.langchain.com/langsmith/platform-setup",
+  "/concepts/self_hosted": "https://docs.langchain.com/langsmith/platform-setup",
+  "/tutorials/deployment": "https://docs.langchain.com/langsmith/deployments",
+  "/cloud/how-tos/assistant_versioning": "https://docs.langchain.com/langsmith/configuration-cloud",
+  "/cloud/concepts/runs": "https://docs.langchain.com/langsmith/assistants#execution",
+  "/how-tos/wait-user-input-functional": "https://docs.langchain.com/oss/python/langgraph/functional-api",
+  "/how-tos/review-tool-calls-functional": "https://docs.langchain.com/oss/python/langgraph/functional-api",
+  "/how-tos/create-react-agent-hitl": "https://docs.langchain.com/oss/python/langgraph/interrupts",
+  "/agents/human-in-the-loop": "https://docs.langchain.com/oss/python/langgraph/interrupts",
+  "/how-tos/human_in_the_loop/dynamic_breakpoints": "https://docs.langchain.com/oss/python/langgraph/interrupts",
+  "/concepts/breakpoints": "https://docs.langchain.com/oss/python/langgraph/interrupts",
+  "/how-tos/human_in_the_loop/breakpoints": "https://docs.langchain.com/oss/python/langgraph/interrupts",
+  "/cloud/how-tos/human_in_the_loop_breakpoint": "https://docs.langchain.com/langsmith/add-human-in-the-loop",
+  "/how-tos/human_in_the_loop/edit-graph-state": "https://docs.langchain.com/oss/python/langgraph/use-time-travel",
+  "/examples/index": "https://docs.langchain.com/oss/python/langgraph/case-studies",
+  "/guides/index": "https://docs.langchain.com/oss/python/langchain/overview",
+  "/tutorials/index": "https://docs.langchain.com/oss/python/learn",
+  "/llms-txt-overview": "https://docs.langchain.com/llms.txt",
+  "/tutorials/rag/langgraph_adaptive_rag": "https://docs.langchain.com/oss/python/langgraph/agentic-rag",
+  "/tutorials/multi_agent/multi-agent-collaboration": "https://docs.langchain.com/oss/python/langchain/multi-agent",
+  "/how-tos/create-react-agent-manage-message-history": "https://docs.langchain.com/oss/python/langgraph/add-memory",
+  "/how-tos/many-tools": "https://docs.langchain.com/oss/python/langchain/tools",
+  "/tutorials/customer-support/customer-support": "https://docs.langchain.com/oss/python/langgraph/agentic-rag",
+  "/how-tos/react-agent-structured-output": "https://docs.langchain.com/oss/python/langchain/agents#structured-output",
+  "/tutorials/code_assistant/langgraph_code_assistant": "https://docs.langchain.com/oss/python/langgraph/agentic-rag",
+  "/tutorials/multi_agent/hierarchical_agent_teams": "https://docs.langchain.com/oss/python/langchain/supervisor",
+  "/tutorials/auth/getting_started": "https://docs.langchain.com/langsmith/auth",
+  "/tutorials/auth/resource_auth": "https://docs.langchain.com/langsmith/resource-auth",
+  "/tutorials/auth/add_auth_server": "https://docs.langchain.com/langsmith/add-auth-server",
+  "/how-tos/use-remote-graph": "https://docs.langchain.com/langsmith/use-remote-graph",
+  "/how-tos/autogen-integration": "https://docs.langchain.com/langsmith/autogen-integration",
+  "/how-tos/human_in_the_loop/wait-user-input": "https://docs.langchain.com/oss/python/langgraph/interrupts",
+  "/cloud/how-tos/use_stream_react": "https://docs.langchain.com/langsmith/use-stream-react",
+  "/cloud/how-tos/generative_ui_react": "https://docs.langchain.com/langsmith/generative-ui-react",
+  "/concepts/langgraph_platform": "https://docs.langchain.com/langsmith/home",
+  "/concepts/langgraph_components": "https://docs.langchain.com/langsmith/components",
+  "/concepts/langgraph_server": "https://docs.langchain.com/langsmith/agent-server",
+  "/concepts/langgraph_data_plane": "https://docs.langchain.com/langsmith/data-plane",
+  "/concepts/langgraph_control_plane": "https://docs.langchain.com/langsmith/control-plane",
+  "/concepts/langgraph_cli": "https://docs.langchain.com/langsmith/cli",
+  "/concepts/langgraph_studio": "https://docs.langchain.com/langsmith/studio",
+  "/cloud/how-tos/studio/quick_start": "https://docs.langchain.com/langsmith/quick-start-studio",
+  "/cloud/how-tos/invoke_studio": "https://docs.langchain.com/langsmith/use-studio",
+  "/cloud/how-tos/studio/manage_assistants": "https://docs.langchain.com/langsmith/use-studio",
+  "/cloud/how-tos/threads_studio": "https://docs.langchain.com/langsmith/use-threads",
+  "/cloud/how-tos/iterate_graph_studio": "https://docs.langchain.com/langsmith/use-studio",
+  "/cloud/how-tos/studio/run_evals": "https://docs.langchain.com/langsmith/observability",
+  "/cloud/how-tos/clone_traces_studio": "https://docs.langchain.com/langsmith/observability",
+  "/cloud/how-tos/datasets_studio": "https://docs.langchain.com/langsmith/use-studio",
+  "/concepts/sdk": "https://docs.langchain.com/langsmith/sdk",
+  "/concepts/plans": "https://docs.langchain.com/langsmith/home",
+  "/concepts/application_structure": "https://docs.langchain.com/langsmith/application-structure",
+  "/concepts/scalability_and_resilience": "https://docs.langchain.com/langsmith/scalability-and-resilience",
+  "/concepts/auth": "https://docs.langchain.com/langsmith/auth",
+  "/how-tos/auth/custom_auth": "https://docs.langchain.com/langsmith/custom-auth",
+  "/how-tos/auth/openapi_security": "https://docs.langchain.com/langsmith/openapi-security",
+  "/concepts/assistants": "https://docs.langchain.com/langsmith/assistants",
+  "/cloud/how-tos/configuration_cloud": "https://docs.langchain.com/langsmith/configuration-cloud",
+  "/cloud/how-tos/use_threads": "https://docs.langchain.com/langsmith/use-threads",
+  "/cloud/how-tos/background_run": "https://docs.langchain.com/langsmith/background-run",
+  "/cloud/how-tos/same-thread": "https://docs.langchain.com/langsmith/same-thread",
+  "/cloud/how-tos/stateless_runs": "https://docs.langchain.com/langsmith/stateless-runs",
+  "/cloud/how-tos/configurable_headers": "https://docs.langchain.com/langsmith/configurable-headers",
+  "/concepts/double_texting": "https://docs.langchain.com/langsmith/double-texting",
+  "/cloud/how-tos/interrupt_concurrent": "https://docs.langchain.com/langsmith/interrupt-concurrent",
+  "/cloud/how-tos/rollback_concurrent": "https://docs.langchain.com/langsmith/rollback-concurrent",
+  "/cloud/how-tos/reject_concurrent": "https://docs.langchain.com/langsmith/reject-concurrent",
+  "/cloud/how-tos/enqueue_concurrent": "https://docs.langchain.com/langsmith/enqueue-concurrent",
+  "/cloud/concepts/webhooks": "https://docs.langchain.com/langsmith/use-webhooks",
+  "/cloud/how-tos/webhooks": "https://docs.langchain.com/langsmith/use-webhooks",
+  "/cloud/concepts/cron_jobs": "https://docs.langchain.com/langsmith/cron-jobs",
+  "/cloud/how-tos/cron_jobs": "https://docs.langchain.com/langsmith/cron-jobs",
+  "/how-tos/http/custom_lifespan": "https://docs.langchain.com/langsmith/custom-lifespan",
+  "/how-tos/http/custom_middleware": "https://docs.langchain.com/langsmith/custom-middleware",
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libs/checkpoint-conformance/pyproject.toml

@@ -62,3 +62,4 @@ target-version = "py310"
 name = "testpypi"
 url = "https://test.pypi.org/simple/"
 publish-url = "https://test.pypi.org/legacy/"
+explicit = true

libs/checkpoint-conformance/uv.lock

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 [[package]]

libs/checkpoint-postgres/Makefile

@@ -1,4 +1,4 @@
-.PHONY: test test_watch lint format
+.PHONY: test test_watch lint type format
 
 ######################
 # TESTING AND COVERAGE
@@ -61,6 +61,9 @@ lint lint_diff lint_package lint_tests:
 	[ "$(PYTHON_FILES)" = "" ] || mkdir -p $(MYPY_CACHE)
 	[ "$(PYTHON_FILES)" = "" ] || uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)
 
+type:
+	mkdir -p $(MYPY_CACHE) && uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)
+
 format format_diff:
 	uv run ruff format $(PYTHON_FILES)
 	uv run ruff check --select I --fix $(PYTHON_FILES)

libs/checkpoint-postgres/uv.lock

@@ -259,7 +259,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.0.0"
+version = "4.0.1"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
@@ -280,6 +280,7 @@ dev = [
     { name = "numpy" },
     { name = "pandas" },
     { name = "pandas-stubs", specifier = ">=2.2.2.240807" },
+    { name = "pycryptodome", specifier = ">=3.23.0" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
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+version = "3.3.3"
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 [[package]]

libs/checkpoint-sqlite/Makefile

@@ -1,4 +1,4 @@
-.PHONY: test test_watch lint format
+.PHONY: test test_watch lint type format
 
 ######################
 # TESTING AND COVERAGE
@@ -32,6 +32,9 @@ lint lint_diff lint_package lint_tests:
 	[ "$(PYTHON_FILES)" = "" ] || mkdir -p $(MYPY_CACHE)
 	[ "$(PYTHON_FILES)" = "" ] || uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)
 
+type:
+	mkdir -p $(MYPY_CACHE) && uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)
+
 format format_diff:
 	uv run ruff format $(PYTHON_FILES)
 	uv run ruff check --select I --fix $(PYTHON_FILES)

libs/checkpoint-sqlite/uv.lock

@@ -268,7 +268,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.0.0"
+version = "4.0.1"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
@@ -289,6 +289,7 @@ dev = [
     { name = "numpy" },
     { name = "pandas" },
     { name = "pandas-stubs", specifier = ">=2.2.2.240807" },
+    { name = "pycryptodome", specifier = ">=3.23.0" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
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 ]
 
 [[package]]

libs/checkpoint/Makefile

@@ -1,4 +1,4 @@
-.PHONY: test test_watch lint format
+.PHONY: test test_watch lint type format
 
 ######################
 # TESTING AND COVERAGE
@@ -32,6 +32,9 @@ lint lint_diff lint_package lint_tests:
 	[ "$(PYTHON_FILES)" = "" ] || mkdir -p $(MYPY_CACHE)
 	[ "$(PYTHON_FILES)" = "" ] || uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)
 
+type:
+	mkdir -p $(MYPY_CACHE) && uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)
+
 format format_diff:
 	uv run ruff format $(PYTHON_FILES)
-	uv run ruff check --select I --fix $(PYTHON_FILES)
+	uv run ruff check --fix $(PYTHON_FILES)

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

@@ -1,6 +1,8 @@
 from __future__ import annotations
 
-from collections.abc import AsyncIterator, Iterator, Mapping, Sequence
+import copy
+import logging
+from collections.abc import AsyncIterator, Collection, Iterator, Mapping, Sequence
 from typing import (  # noqa: UP035
     Any,
     Generic,
@@ -14,6 +16,7 @@ from langchain_core.runnables import RunnableConfig
 
 from langgraph.checkpoint.base.id import uuid6
 from langgraph.checkpoint.serde.base import SerializerProtocol, maybe_add_typed_methods
+from langgraph.checkpoint.serde.encrypted import EncryptedSerializer
 from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
 from langgraph.checkpoint.serde.types import (
     ERROR,
@@ -25,6 +28,7 @@ from langgraph.checkpoint.serde.types import (
 
 V = TypeVar("V", int, float, str)
 PendingWrite = tuple[str, str, Any]
+logger = logging.getLogger(__name__)
 
 
 # Marked as total=False to allow for future expansion.
@@ -474,6 +478,37 @@ class BaseCheckpointSaver(Generic[V]):
         else:
             return current + 1
 
+    def with_allowlist(
+        self, extra_allowlist: Collection[tuple[str, ...]]
+    ) -> BaseCheckpointSaver[V]:
+        """Return a shallow clone with a derived msgpack allowlist."""
+        serde = _with_msgpack_allowlist(self.serde, extra_allowlist)
+        if serde is self.serde:
+            return self
+        clone = copy.copy(self)
+        clone.serde = maybe_add_typed_methods(serde)
+        return clone
+
+
+def _with_msgpack_allowlist(
+    serde: SerializerProtocol, extra_allowlist: Collection[tuple[str, ...]]
+) -> SerializerProtocol:
+    if isinstance(serde, JsonPlusSerializer):
+        return serde.with_msgpack_allowlist(extra_allowlist)
+    if isinstance(serde, EncryptedSerializer):
+        inner = serde.serde
+        if isinstance(inner, JsonPlusSerializer):
+            updated_inner = inner.with_msgpack_allowlist(extra_allowlist)
+            if updated_inner is inner:
+                return serde
+            return EncryptedSerializer(serde.cipher, updated_inner)
+    logger.warning(
+        "Serializer %s does not support msgpack allowlist. "
+        "Strict msgpack deserialization will not be enforced.",
+        type(serde).__name__,
+    )
+    return serde
+
 
 class EmptyChannelError(Exception):
     """Raised when attempting to get the value of a channel that hasn't been updated

libs/checkpoint/langgraph/checkpoint/serde/_msgpack.py

@@ -0,0 +1,89 @@
+import os
+from collections.abc import Iterable
+from typing import cast
+
+STRICT_MSGPACK_ENABLED = os.getenv("LANGGRAPH_STRICT_MSGPACK", "false").lower() in (
+    "1",
+    "true",
+    "yes",
+)
+
+
+_SENTINEL = cast(None, object())
+
+SAFE_MSGPACK_TYPES: frozenset[tuple[str, ...]] = frozenset(
+    {
+        # datetime types
+        ("datetime", "datetime"),
+        ("datetime", "date"),
+        ("datetime", "time"),
+        ("datetime", "timedelta"),
+        ("datetime", "timezone"),
+        # uuid
+        ("uuid", "UUID"),
+        # numeric
+        ("decimal", "Decimal"),
+        # collections
+        ("builtins", "set"),
+        ("builtins", "frozenset"),
+        ("collections", "deque"),
+        # ip addresses
+        ("ipaddress", "IPv4Address"),
+        ("ipaddress", "IPv4Interface"),
+        ("ipaddress", "IPv4Network"),
+        ("ipaddress", "IPv6Address"),
+        ("ipaddress", "IPv6Interface"),
+        ("ipaddress", "IPv6Network"),
+        # pathlib
+        ("pathlib", "Path"),
+        ("pathlib", "PosixPath"),
+        ("pathlib", "WindowsPath"),
+        # pathlib in Python 3.13+
+        ("pathlib._local", "Path"),
+        ("pathlib._local", "PosixPath"),
+        ("pathlib._local", "WindowsPath"),
+        # zoneinfo
+        ("zoneinfo", "ZoneInfo"),
+        # regex
+        ("re", "compile"),
+        # langchain-core messages (safe container types used by graph state)
+        ("langchain_core.messages.base", "BaseMessage"),
+        ("langchain_core.messages.base", "BaseMessageChunk"),
+        ("langchain_core.messages.human", "HumanMessage"),
+        ("langchain_core.messages.human", "HumanMessageChunk"),
+        ("langchain_core.messages.ai", "AIMessage"),
+        ("langchain_core.messages.ai", "AIMessageChunk"),
+        ("langchain_core.messages.system", "SystemMessage"),
+        ("langchain_core.messages.system", "SystemMessageChunk"),
+        ("langchain_core.messages.chat", "ChatMessage"),
+        ("langchain_core.messages.chat", "ChatMessageChunk"),
+        ("langchain_core.messages.tool", "ToolMessage"),
+        ("langchain_core.messages.tool", "ToolMessageChunk"),
+        ("langchain_core.messages.function", "FunctionMessage"),
+        ("langchain_core.messages.function", "FunctionMessageChunk"),
+        ("langchain_core.messages.modifier", "RemoveMessage"),
+        # langchain-core document model
+        ("langchain_core.documents.base", "Document"),
+        # langgraph
+        ("langgraph.types", "Send"),
+        ("langgraph.types", "Interrupt"),
+        ("langgraph.types", "Command"),
+        ("langgraph.types", "StateSnapshot"),
+        ("langgraph.types", "PregelTask"),
+        ("langgraph.types", "Overwrite"),
+        ("langgraph.store.base", "Item"),
+        ("langgraph.store.base", "GetOp"),
+    }
+)
+
+# Allowed (module, name, method) triples for EXT_METHOD_SINGLE_ARG.
+# Only these specific method invocations are permitted during deserialization.
+# This is separate from SAFE_MSGPACK_TYPES which only governs construction.
+SAFE_MSGPACK_METHODS: frozenset[tuple[str, str, str]] = frozenset(
+    {
+        ("datetime", "datetime", "fromisoformat"),
+    }
+)
+
+
+AllowedMsgpackModules = Iterable[tuple[str, ...] | type]

libs/checkpoint/langgraph/checkpoint/serde/encrypted.py

@@ -41,7 +41,7 @@ class EncryptedSerializer(SerializerProtocol):
     ) -> "EncryptedSerializer":
         """Create an `EncryptedSerializer` using AES encryption."""
         try:
-            from Crypto.Cipher import AES  # type: ignore
+            from Crypto.Cipher import AES
         except ImportError:
             raise ImportError(
                 "Pycryptodome is not installed. Please install it with `pip install pycryptodome`."

libs/checkpoint/langgraph/checkpoint/serde/event_hooks.py

@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+import logging
+from collections.abc import Callable
+from threading import Lock
+from typing import TypedDict
+
+from typing_extensions import NotRequired
+
+logger = logging.getLogger(__name__)
+
+
+class SerdeEvent(TypedDict):
+    kind: str
+    module: str
+    name: str
+    method: NotRequired[str]
+
+
+SerdeEventListener = Callable[[SerdeEvent], None]
+
+_listeners: list[SerdeEventListener] = []
+_listeners_lock = Lock()
+
+
+def register_serde_event_listener(listener: SerdeEventListener) -> Callable[[], None]:
+    """Register a listener for serde allowlist events."""
+    with _listeners_lock:
+        _listeners.append(listener)
+
+    def unregister() -> None:
+        with _listeners_lock:
+            try:
+                _listeners.remove(listener)
+            except ValueError:
+                pass
+
+    return unregister
+
+
+def emit_serde_event(event: SerdeEvent) -> None:
+    """Emit a serde event to all listeners.
+
+    Listener failures are isolated and logged.
+    """
+    with _listeners_lock:
+        listeners = tuple(_listeners)
+    for listener in listeners:
+        try:
+            listener(event)
+        except Exception:
+            logger.warning("Serde listener failed", exc_info=True)

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

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import copy
 import dataclasses
 import decimal
 import importlib
@@ -10,7 +11,7 @@ import pickle
 import re
 import sys
 from collections import deque
-from collections.abc import Callable, Sequence
+from collections.abc import Callable, Iterable, Sequence
 from datetime import date, datetime, time, timedelta, timezone
 from enum import Enum
 from inspect import isclass
@@ -22,17 +23,25 @@ from ipaddress import (
     IPv6Interface,
     IPv6Network,
 )
-from typing import Any, Literal
+from typing import TYPE_CHECKING, Any, Literal, cast
 from uuid import UUID
 from zoneinfo import ZoneInfo
 
 import ormsgpack
 from langchain_core.load.load import Reviver
 
+from langgraph.checkpoint.serde import _msgpack as _lg_msgpack
 from langgraph.checkpoint.serde.base import SerializerProtocol
+from langgraph.checkpoint.serde.event_hooks import emit_serde_event
 from langgraph.checkpoint.serde.types import SendProtocol
 from langgraph.store.base import Item
 
+if TYPE_CHECKING:
+    from langgraph.checkpoint.serde._msgpack import (
+        AllowedMsgpackModules,
+    )
+    from langgraph.checkpoint.serde.types import SendProtocol
+
 LC_REVIVER = Reviver()
 EMPTY_BYTES = b""
 logger = logging.getLogger(__name__)
@@ -53,21 +62,62 @@ class JsonPlusSerializer(SerializerProtocol):
         self,
         *,
         pickle_fallback: bool = False,
-        allowed_json_modules: Sequence[tuple[str, ...]] | Literal[True] | None = None,
+        allowed_json_modules: Iterable[tuple[str, ...]] | Literal[True] | None = None,
+        allowed_msgpack_modules: (
+            AllowedMsgpackModules | Literal[True] | None
+        ) = _lg_msgpack._SENTINEL,
         __unpack_ext_hook__: Callable[[int, bytes], Any] | None = None,
     ) -> None:
+        if allowed_msgpack_modules is _lg_msgpack._SENTINEL:
+            if _lg_msgpack.STRICT_MSGPACK_ENABLED:
+                allowed_msgpack_modules = None
+            else:
+                allowed_msgpack_modules = True
         self.pickle_fallback = pickle_fallback
-        self._allowed_modules = (
-            {mod_and_name for mod_and_name in allowed_json_modules}
-            if allowed_json_modules and allowed_json_modules is not True
-            else (allowed_json_modules if allowed_json_modules is True else None)
+        self._allowed_json_modules: set[tuple[str, ...]] | Literal[True] | None = (
+            _normalize_allowlist(allowed_json_modules)
         )
+        self._allowed_msgpack_modules = _normalize_allowlist(allowed_msgpack_modules)
+
+        self._custom_unpack_ext_hook = __unpack_ext_hook__ is not None
         self._unpack_ext_hook = (
             __unpack_ext_hook__
             if __unpack_ext_hook__ is not None
-            else _msgpack_ext_hook
+            else _create_msgpack_ext_hook(self._allowed_msgpack_modules)
         )
 
+    def with_msgpack_allowlist(
+        self, extra_allowlist: Iterable[tuple[str, ...] | type]
+    ) -> JsonPlusSerializer:
+        """Return a new serializer with a merged msgpack allowlist."""
+        base_allowlist = self._allowed_msgpack_modules
+        if base_allowlist is True or base_allowlist is False:
+            return self
+        elif base_allowlist:
+            base_allowlist = set(base_allowlist)
+        else:
+            base_allowlist = set()
+        extra = _normalize_module_keys(tuple(extra_allowlist))
+        merged = base_allowlist | extra
+        if merged == base_allowlist:
+            return self
+        allowed_msgpack_modules: AllowedMsgpackModules | Literal[True] | None
+        if merged:
+            allowed_msgpack_modules = tuple(merged)
+        elif isinstance(self._allowed_msgpack_modules, set):
+            allowed_msgpack_modules = tuple(self._allowed_msgpack_modules)
+        else:
+            allowed_msgpack_modules = self._allowed_msgpack_modules
+
+        clone = copy.copy(self)
+        clone._allowed_json_modules = _normalize_allowlist(self._allowed_json_modules)
+        clone._allowed_msgpack_modules = _normalize_allowlist(allowed_msgpack_modules)
+        if not clone._custom_unpack_ext_hook:
+            clone._unpack_ext_hook = _create_msgpack_ext_hook(
+                clone._allowed_msgpack_modules
+            )
+        return clone
+
     def _encode_constructor_args(
         self,
         constructor: Callable | type[Any],
@@ -90,7 +140,7 @@ class JsonPlusSerializer(SerializerProtocol):
         return out
 
     def _reviver(self, value: dict[str, Any]) -> Any:
-        if self._allowed_modules and (
+        if self._allowed_json_modules and (
             value.get("lc", None) == 2
             and value.get("type", None) == "constructor"
             and value.get("id", None) is not None
@@ -107,7 +157,7 @@ class JsonPlusSerializer(SerializerProtocol):
         return LC_REVIVER(value)
 
     def _revive_lc2(self, value: dict[str, Any]) -> Any:
-        self._check_allowed_modules(value)
+        self._check_allowed_json_modules(value)
 
         [*module, name] = value["id"]
         try:
@@ -139,7 +189,7 @@ class JsonPlusSerializer(SerializerProtocol):
         except Exception:
             return None
 
-    def _check_allowed_modules(self, value: dict[str, Any]) -> None:
+    def _check_allowed_json_modules(self, value: dict[str, Any]) -> None:
         needed = tuple(value["id"])
         method = value.get("method")
         if isinstance(method, list):
@@ -150,7 +200,7 @@ class JsonPlusSerializer(SerializerProtocol):
             method_display = "<init>"
 
         dotted = ".".join(needed)
-        if not self._allowed_modules:
+        if not self._allowed_json_modules:
             raise InvalidModuleError(
                 f"Refused to deserialize JSON constructor: {dotted} (method: {method_display}). "
                 "No allowed_json_modules configured.\n\n"
@@ -161,9 +211,9 @@ class JsonPlusSerializer(SerializerProtocol):
                 "or plain-JSON representations revived without import-time side effects."
             )
 
-        if self._allowed_modules is True:
+        if self._allowed_json_modules is True:
             return
-        if needed in self._allowed_modules:
+        if needed in self._allowed_json_modules:
             return
 
         raise InvalidModuleError(
@@ -448,92 +498,196 @@ def _msgpack_default(obj: Any) -> str | ormsgpack.Ext:
         raise TypeError(f"Object of type {obj.__class__.__name__} is not serializable")
 
 
-def _msgpack_ext_hook(code: int, data: bytes) -> Any:
-    if code == EXT_CONSTRUCTOR_SINGLE_ARG:
-        try:
-            tup = ormsgpack.unpackb(
-                data, ext_hook=_msgpack_ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
-            )
-            # module, name, arg
-            return getattr(importlib.import_module(tup[0]), tup[1])(tup[2])
-        except Exception:
-            return
-    elif code == EXT_CONSTRUCTOR_POS_ARGS:
-        try:
-            tup = ormsgpack.unpackb(
-                data, ext_hook=_msgpack_ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
-            )
-            # module, name, args
-            return getattr(importlib.import_module(tup[0]), tup[1])(*tup[2])
-        except Exception:
-            return
-    elif code == EXT_CONSTRUCTOR_KW_ARGS:
-        try:
-            tup = ormsgpack.unpackb(
-                data, ext_hook=_msgpack_ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
-            )
-            # module, name, args
-            return getattr(importlib.import_module(tup[0]), tup[1])(**tup[2])
-        except Exception:
-            return
-    elif code == EXT_METHOD_SINGLE_ARG:
-        try:
-            tup = ormsgpack.unpackb(
-                data, ext_hook=_msgpack_ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
-            )
-            # module, name, arg, method
-            return getattr(getattr(importlib.import_module(tup[0]), tup[1]), tup[3])(
-                tup[2]
-            )
-        except Exception:
-            return
-    elif code == EXT_PYDANTIC_V1:
-        try:
-            tup = ormsgpack.unpackb(
-                data, ext_hook=_msgpack_ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
-            )
-            # module, name, kwargs
-            cls = getattr(importlib.import_module(tup[0]), tup[1])
-            try:
-                return cls(**tup[2])
-            except Exception:
-                return cls.construct(**tup[2])
-        except Exception:
-            # for pydantic objects we can't find/reconstruct
-            # let's return the kwargs dict instead
-            try:
-                return tup[2]
-            except NameError:
-                return
-    elif code == EXT_PYDANTIC_V2:
-        try:
-            tup = ormsgpack.unpackb(
-                data, ext_hook=_msgpack_ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
-            )
-            # module, name, kwargs, method
-            cls = getattr(importlib.import_module(tup[0]), tup[1])
-            try:
-                return cls(**tup[2])
-            except Exception:
-                return cls.model_construct(**tup[2])
-        except Exception:
-            # for pydantic objects we can't find/reconstruct
-            # let's return the kwargs dict instead
-            try:
-                return tup[2]
-            except NameError:
-                return
-    elif code == EXT_NUMPY_ARRAY:
-        try:
-            import numpy as _np
+def _create_msgpack_ext_hook(
+    allowed_modules: set[tuple[str, ...]] | Literal[True] | None,
+) -> Callable[[int, bytes], Any]:
+    """Create msgpack ext hook with allowlist.
 
-            dtype_str, shape, order, buf = ormsgpack.unpackb(
-                data, ext_hook=_msgpack_ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
+    Args:
+        allowed_modules: Set of (module, name) tuples that are allowed to be
+        deserialized, or True to allow all with warnings for unregistered types, or None to only allow safe types.
+
+    Returns:
+        An ext_hook function for use with ormsgpack.unpackb.
+    """
+
+    def _check_allowed(module: str, name: str) -> bool:
+        """Check if type is allowed. Returns True if allowed, False if blocked."""
+        key = (module, name)
+
+        if key in _lg_msgpack.SAFE_MSGPACK_TYPES:
+            return True
+
+        if allowed_modules is True:
+            # default is to warn but allow unregistered types
+            emit_serde_event(
+                {
+                    "kind": "msgpack_unregistered_allowed",
+                    "module": module,
+                    "name": name,
+                }
             )
-            arr = _np.frombuffer(buf, dtype=_np.dtype(dtype_str))
-            return arr.reshape(shape, order=order)
-        except Exception:
-            return
+            logger.warning(
+                "Deserializing unregistered type %s.%s from checkpoint. "
+                "This will be blocked in a future version. "
+                "Add to allowed_msgpack_modules to silence: [(%r, %r)]",
+                module,
+                name,
+                module,
+                name,
+            )
+            return True
+        if allowed_modules is not None:
+            if key in allowed_modules:
+                return True
+        # strict mode blocks unregistered types
+        emit_serde_event(
+            {
+                "kind": "msgpack_blocked",
+                "module": module,
+                "name": name,
+            }
+        )
+        logger.warning(
+            "Blocked deserialization of %s.%s - not in allowed_msgpack_modules. "
+            "Add to allowed_msgpack_modules to allow: [(%r, %r)]",
+            module,
+            name,
+            module,
+            name,
+        )
+        return False
+
+    def _check_allowed_method(module: str, name: str, method: str) -> bool:
+        """Check if a method invocation is allowed."""
+        key = (module, name, method)
+        if key in _lg_msgpack.SAFE_MSGPACK_METHODS:
+            return True
+        emit_serde_event(
+            {
+                "kind": "msgpack_method_blocked",
+                "module": module,
+                "name": name,
+                "method": method,
+            }
+        )
+        logger.warning(
+            "Blocked deserialization of method call %s.%s.%s - "
+            "not in allowed methods set.",
+            module,
+            name,
+            method,
+        )
+        return False
+
+    def ext_hook(code: int, data: bytes) -> Any:
+        if code == EXT_CONSTRUCTOR_SINGLE_ARG:
+            try:
+                tup = ormsgpack.unpackb(
+                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
+                )
+                if not _check_allowed(tup[0], tup[1]):
+                    # We default to returning the raw data. If the user
+                    # is using this in the context of a pydantic state, etc., then
+                    # it would be validated upon construction.
+                    return tup[2]
+                # module, name, arg
+                return getattr(importlib.import_module(tup[0]), tup[1])(tup[2])
+            except Exception:
+                return None
+        elif code == EXT_CONSTRUCTOR_POS_ARGS:
+            try:
+                tup = ormsgpack.unpackb(
+                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
+                )
+                if not _check_allowed(tup[0], tup[1]):
+                    return tup[2]
+                # module, name, args
+                return getattr(importlib.import_module(tup[0]), tup[1])(*tup[2])
+            except Exception:
+                return None
+        elif code == EXT_CONSTRUCTOR_KW_ARGS:
+            try:
+                tup = ormsgpack.unpackb(
+                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
+                )
+                if not _check_allowed(tup[0], tup[1]):
+                    return tup[2]
+                # module, name, kwargs
+                return getattr(importlib.import_module(tup[0]), tup[1])(**tup[2])
+            except Exception:
+                return None
+        elif code == EXT_METHOD_SINGLE_ARG:
+            try:
+                tup = ormsgpack.unpackb(
+                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
+                )
+                if not _check_allowed_method(tup[0], tup[1], tup[3]):
+                    return tup[2]
+                # module, name, arg, method
+                return getattr(
+                    getattr(importlib.import_module(tup[0]), tup[1]), tup[3]
+                )(tup[2])
+            except Exception:
+                return None
+        elif code == EXT_PYDANTIC_V1:
+            try:
+                tup = ormsgpack.unpackb(
+                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
+                )
+                if not _check_allowed(tup[0], tup[1]):
+                    return tup[2]
+                # module, name, kwargs
+                cls = getattr(importlib.import_module(tup[0]), tup[1])
+                try:
+                    return cls(**tup[2])
+                except Exception:
+                    return cls.construct(**tup[2])
+            except Exception:
+                # for pydantic objects we can't find/reconstruct
+                # let's return the kwargs dict instead
+                try:
+                    return tup[2]
+                except NameError:
+                    return None
+        elif code == EXT_PYDANTIC_V2:
+            try:
+                tup = ormsgpack.unpackb(
+                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
+                )
+                if not _check_allowed(tup[0], tup[1]):
+                    return tup[2]
+                # module, name, kwargs, method
+                cls = getattr(importlib.import_module(tup[0]), tup[1])
+                try:
+                    return cls(**tup[2])
+                except Exception:
+                    return cls.model_construct(**tup[2])
+            except Exception:
+                # for pydantic objects we can't find/reconstruct
+                # let's return the kwargs dict instead
+                try:
+                    return tup[2]
+                except NameError:
+                    return None
+        elif code == EXT_NUMPY_ARRAY:
+            try:
+                import numpy as _np
+
+                dtype_str, shape, order, buf = ormsgpack.unpackb(
+                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
+                )
+                arr = _np.frombuffer(buf, dtype=_np.dtype(dtype_str))
+                return arr.reshape(shape, order=order)
+            except Exception:
+                return None
+        return None
+
+    return ext_hook
+
+
+# Aliasing in case anyone imported it directly
+_msgpack_ext_hook = _create_msgpack_ext_hook(allowed_modules=None)
 
 
 def _msgpack_ext_hook_to_json(code: int, data: bytes) -> Any:
@@ -648,3 +802,26 @@ _option = (
 
 def _msgpack_enc(data: Any) -> bytes:
     return ormsgpack.packb(data, default=_msgpack_default, option=_option)
+
+
+def _normalize_allowlist(
+    allowlist: AllowedMsgpackModules | Literal[True] | None,
+) -> set[tuple[str, ...]] | Literal[True] | None:
+    if allowlist is True:
+        return allowlist
+    elif allowlist:
+        return _normalize_module_keys(allowlist)
+    else:
+        return None
+
+
+def _normalize_module_keys(
+    modules: AllowedMsgpackModules,
+) -> set[tuple[str, ...]]:
+    normalized: set[tuple[str, ...]] = set()
+    for module in modules:
+        if isclass(module):
+            normalized.add((module.__module__, module.__name__))
+        else:
+            normalized.add(cast(tuple[str, ...], module))
+    return normalized

libs/checkpoint/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint"
-version = "4.0.0"
+version = "4.0.1"
 description = "Library with base interfaces for LangGraph checkpoint savers."
 authors = []
 requires-python = ">=3.10"
@@ -42,6 +42,7 @@ lint = [
 dev = [
   {include-group = "test"},
   {include-group = "lint"},
+  "pycryptodome>=3.23.0",
 ]
 
 [tool.hatch.build.targets.wheel]

libs/checkpoint/tests/test_encrypted.py

@@ -0,0 +1,437 @@
+"""Tests for EncryptedSerializer with msgpack allowlist functionality.
+
+These tests mirror the msgpack allowlist tests in test_jsonplus.py but run them
+through the EncryptedSerializer to ensure the allowlist behavior is preserved
+when encryption is enabled.
+"""
+
+from __future__ import annotations
+
+import logging
+import pathlib
+import re
+import uuid
+from collections import deque
+from datetime import date, datetime, time, timezone
+from decimal import Decimal
+from ipaddress import IPv4Address
+from typing import Literal, cast
+
+import ormsgpack
+import pytest
+from pydantic import BaseModel
+
+from langgraph.checkpoint.base import BaseCheckpointSaver, _with_msgpack_allowlist
+from langgraph.checkpoint.serde import _msgpack as _lg_msgpack
+from langgraph.checkpoint.serde.base import CipherProtocol
+from langgraph.checkpoint.serde.encrypted import EncryptedSerializer
+from langgraph.checkpoint.serde.jsonplus import (
+    EXT_METHOD_SINGLE_ARG,
+    JsonPlusSerializer,
+    _msgpack_enc,
+)
+
+
+class InnerPydantic(BaseModel):
+    hello: str
+
+
+class MyPydantic(BaseModel):
+    foo: str
+    bar: int
+    inner: InnerPydantic
+
+
+class AnotherPydantic(BaseModel):
+    foo: str
+
+
+class _PassthroughCipher(CipherProtocol):
+    def encrypt(self, plaintext: bytes) -> tuple[str, bytes]:
+        return "passthrough", plaintext
+
+    def decrypt(self, ciphername: str, ciphertext: bytes) -> bytes:
+        assert ciphername == "passthrough"
+        return ciphertext
+
+
+def _make_encrypted_serde(
+    allowed_msgpack_modules: (
+        _lg_msgpack.AllowedMsgpackModules | Literal[True] | None | object
+    ) = _lg_msgpack._SENTINEL,
+) -> EncryptedSerializer:
+    """Create an EncryptedSerializer with AES encryption for testing."""
+    inner = JsonPlusSerializer(
+        allowed_msgpack_modules=cast(
+            _lg_msgpack.AllowedMsgpackModules | Literal[True] | None,
+            allowed_msgpack_modules,
+        )
+    )
+    return EncryptedSerializer.from_pycryptodome_aes(
+        serde=inner, key=b"1234567890123456"
+    )
+
+
+def test_msgpack_method_pathlib_blocked_encrypted_strict(
+    tmp_path: pathlib.Path, caplog: pytest.LogCaptureFixture
+) -> None:
+    target = tmp_path / "secret.txt"
+    target.write_text("secret")
+    payload = ormsgpack.packb(
+        ormsgpack.Ext(
+            EXT_METHOD_SINGLE_ARG,
+            _msgpack_enc(("pathlib", "Path", target, "read_text")),
+        ),
+        option=ormsgpack.OPT_NON_STR_KEYS,
+    )
+    serde = EncryptedSerializer(
+        _PassthroughCipher(),
+        JsonPlusSerializer(allowed_msgpack_modules=None),
+    )
+
+    caplog.set_level(logging.WARNING, logger="langgraph.checkpoint.serde.jsonplus")
+    caplog.clear()
+    result = serde.loads_typed(("msgpack+passthrough", payload))
+
+    assert result == target
+    assert "blocked deserialization of method call pathlib.path.read_text" in (
+        caplog.text.lower()
+    )
+
+
+class TestEncryptedSerializerMsgpackAllowlist:
+    """Test msgpack allowlist behavior through EncryptedSerializer."""
+
+    def test_safe_types_no_warning(self, caplog: pytest.LogCaptureFixture) -> None:
+        """Test safe types deserialize without warnings through encryption."""
+        serde = _make_encrypted_serde()
+
+        safe_objects = [
+            datetime.now(),
+            date.today(),
+            time(12, 30),
+            timezone.utc,
+            uuid.uuid4(),
+            Decimal("123.45"),
+            {1, 2, 3},
+            frozenset([1, 2, 3]),
+            deque([1, 2, 3]),
+            IPv4Address("192.168.1.1"),
+            pathlib.Path("/tmp/test"),
+        ]
+
+        for obj in safe_objects:
+            caplog.clear()
+            dumped = serde.dumps_typed(obj)
+            # Verify encryption is happening
+            assert "+aes" in dumped[0], f"Expected encryption for {type(obj)}"
+            result = serde.loads_typed(dumped)
+            assert "unregistered type" not in caplog.text.lower(), (
+                f"Unexpected warning for {type(obj)}"
+            )
+            assert result is not None
+
+    def test_pydantic_warns_by_default(self, caplog: pytest.LogCaptureFixture) -> None:
+        """Pydantic models not in allowlist should log warning but still deserialize."""
+        current = _lg_msgpack.STRICT_MSGPACK_ENABLED
+        _lg_msgpack.STRICT_MSGPACK_ENABLED = False
+        serde = _make_encrypted_serde()
+
+        obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+        caplog.clear()
+        dumped = serde.dumps_typed(obj)
+        assert "+aes" in dumped[0]
+        result = serde.loads_typed(dumped)
+
+        assert "unregistered type" in caplog.text.lower()
+        assert "allowed_msgpack_modules" in caplog.text
+        assert result == obj
+        _lg_msgpack.STRICT_MSGPACK_ENABLED = current
+
+    def test_strict_mode_blocks_unregistered(
+        self, caplog: pytest.LogCaptureFixture
+    ) -> None:
+        """Strict mode should block unregistered types through encryption."""
+        serde = _make_encrypted_serde(allowed_msgpack_modules=None)
+
+        obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+        caplog.clear()
+        dumped = serde.dumps_typed(obj)
+        assert "+aes" in dumped[0]
+        result = serde.loads_typed(dumped)
+
+        assert "blocked" in caplog.text.lower()
+        expected = obj.model_dump()
+        assert result == expected
+
+    def test_allowlist_silences_warning(self, caplog: pytest.LogCaptureFixture) -> None:
+        """Types in allowed_msgpack_modules should deserialize without warnings."""
+        serde = _make_encrypted_serde(
+            allowed_msgpack_modules=[
+                ("tests.test_encrypted", "MyPydantic"),
+                ("tests.test_encrypted", "InnerPydantic"),
+            ]
+        )
+
+        obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+        caplog.clear()
+        dumped = serde.dumps_typed(obj)
+        assert "+aes" in dumped[0]
+        result = serde.loads_typed(dumped)
+
+        assert "unregistered type" not in caplog.text.lower()
+        assert "blocked" not in caplog.text.lower()
+        assert result == obj
+
+    def test_allowlist_blocks_non_listed(
+        self, caplog: pytest.LogCaptureFixture
+    ) -> None:
+        """Allowlists should block unregistered types even through encryption."""
+        serde = _make_encrypted_serde(
+            allowed_msgpack_modules=[("tests.test_encrypted", "MyPydantic")]
+        )
+
+        obj = AnotherPydantic(foo="nope")
+
+        caplog.clear()
+        dumped = serde.dumps_typed(obj)
+        assert "+aes" in dumped[0]
+        result = serde.loads_typed(dumped)
+
+        assert "blocked" in caplog.text.lower()
+        expected = obj.model_dump()
+        assert result == expected
+
+    def test_safe_types_value_equality(self, caplog: pytest.LogCaptureFixture) -> None:
+        """Verify safe types are correctly restored with proper values through encryption."""
+        serde = _make_encrypted_serde(allowed_msgpack_modules=None)
+
+        test_cases = [
+            datetime(2024, 1, 15, 12, 30, 45, 123456),
+            date(2024, 6, 15),
+            time(14, 30, 0),
+            uuid.UUID("12345678-1234-5678-1234-567812345678"),
+            Decimal("123.456789"),
+            {1, 2, 3, 4, 5},
+            frozenset(["a", "b", "c"]),
+            deque([1, 2, 3]),
+            IPv4Address("10.0.0.1"),
+            pathlib.Path("/some/test/path"),
+            re.compile(r"\d+", re.MULTILINE),
+        ]
+
+        for obj in test_cases:
+            caplog.clear()
+            dumped = serde.dumps_typed(obj)
+            assert "+aes" in dumped[0], f"Expected encryption for {type(obj)}"
+            result = serde.loads_typed(dumped)
+
+            assert "blocked" not in caplog.text.lower(), f"Blocked for {type(obj)}"
+            if isinstance(obj, re.Pattern):
+                assert result.pattern == obj.pattern
+                assert result.flags == obj.flags
+            else:
+                assert result == obj, (
+                    f"Value mismatch for {type(obj)}: {result} != {obj}"
+                )
+
+    def test_regex_safe_type(self, caplog: pytest.LogCaptureFixture) -> None:
+        """re.compile patterns should deserialize without warnings as a safe type."""
+        serde = _make_encrypted_serde(allowed_msgpack_modules=None)
+        pattern = re.compile(r"foo.*bar", re.IGNORECASE | re.DOTALL)
+
+        caplog.clear()
+        dumped = serde.dumps_typed(pattern)
+        assert "+aes" in dumped[0]
+        result = serde.loads_typed(dumped)
+
+        assert "blocked" not in caplog.text.lower()
+        assert "unregistered" not in caplog.text.lower()
+        assert result.pattern == pattern.pattern
+        assert result.flags == pattern.flags
+
+
+class TestWithMsgpackAllowlistEncrypted:
+    """Test _with_msgpack_allowlist function with EncryptedSerializer."""
+
+    def test_propagates_allowlist_to_inner_serde(self) -> None:
+        """_with_msgpack_allowlist should propagate allowlist to inner JsonPlusSerializer."""
+        inner = JsonPlusSerializer(allowed_msgpack_modules=None)
+        encrypted = EncryptedSerializer.from_pycryptodome_aes(
+            serde=inner, key=b"1234567890123456"
+        )
+
+        extra = [("my.module", "MyClass")]
+        result = _with_msgpack_allowlist(encrypted, extra)
+
+        # Should return a new EncryptedSerializer
+        assert isinstance(result, EncryptedSerializer)
+        assert result is not encrypted
+        # Inner serde should have the allowlist
+        assert isinstance(result.serde, JsonPlusSerializer)
+        assert isinstance(result.serde._allowed_msgpack_modules, set)
+        assert ("my.module", "MyClass") in result.serde._allowed_msgpack_modules
+
+    def test_preserves_cipher(self) -> None:
+        """_with_msgpack_allowlist should preserve the cipher from the original."""
+        inner = JsonPlusSerializer(allowed_msgpack_modules=None)
+        encrypted = EncryptedSerializer.from_pycryptodome_aes(
+            serde=inner, key=b"1234567890123456"
+        )
+
+        result = _with_msgpack_allowlist(encrypted, [("my.module", "MyClass")])
+
+        assert isinstance(result, EncryptedSerializer)
+        # Should use the same cipher
+        assert result.cipher is encrypted.cipher
+
+    def test_returns_same_if_not_jsonplus_inner(self) -> None:
+        """_with_msgpack_allowlist should return same serde if inner is not JsonPlusSerializer."""
+
+        class DummyInnerSerde:
+            def dumps_typed(self, obj: object) -> tuple[str, bytes]:
+                return ("dummy", b"")
+
+            def loads_typed(self, data: tuple[str, bytes]) -> None:
+                return None
+
+        from langgraph.checkpoint.serde.base import CipherProtocol
+
+        class DummyCipher(CipherProtocol):
+            def encrypt(self, plaintext: bytes) -> tuple[str, bytes]:
+                return "dummy", plaintext
+
+            def decrypt(self, ciphername: str, ciphertext: bytes) -> bytes:
+                return ciphertext
+
+        encrypted = EncryptedSerializer(DummyCipher(), DummyInnerSerde())
+        result = _with_msgpack_allowlist(encrypted, [("my.module", "MyClass")])
+
+        assert result is encrypted
+
+    def test_warns_if_allowlist_unsupported(
+        self, caplog: pytest.LogCaptureFixture
+    ) -> None:
+        class DummySerde:
+            def dumps_typed(self, obj: object) -> tuple[str, bytes]:
+                return ("dummy", b"")
+
+            def loads_typed(self, data: tuple[str, bytes]) -> object:
+                return data
+
+        serde = DummySerde()
+        caplog.set_level(logging.WARNING, logger="langgraph.checkpoint.base")
+        caplog.clear()
+
+        result = _with_msgpack_allowlist(serde, [("my.module", "MyClass")])
+
+        assert result is serde
+        assert "does not support msgpack allowlist" in caplog.text.lower()
+
+    def test_noop_allowlist_returns_same_encrypted_instance(self) -> None:
+        inner = JsonPlusSerializer(allowed_msgpack_modules=None)
+        encrypted = EncryptedSerializer.from_pycryptodome_aes(
+            serde=inner, key=b"1234567890123456"
+        )
+
+        result = _with_msgpack_allowlist(encrypted, ())
+
+        assert result is encrypted
+
+    def test_functional_roundtrip_with_allowlist(
+        self, caplog: pytest.LogCaptureFixture
+    ) -> None:
+        """End-to-end test: allowlist applied via _with_msgpack_allowlist works."""
+        inner = JsonPlusSerializer(allowed_msgpack_modules=None)
+        encrypted = EncryptedSerializer.from_pycryptodome_aes(
+            serde=inner, key=b"1234567890123456"
+        )
+
+        # Apply allowlist for MyPydantic
+        updated = _with_msgpack_allowlist(
+            encrypted,
+            [
+                ("tests.test_encrypted", "MyPydantic"),
+                ("tests.test_encrypted", "InnerPydantic"),
+            ],
+        )
+
+        obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+        caplog.clear()
+        dumped = updated.dumps_typed(obj)
+        assert "+aes" in dumped[0]
+        result = updated.loads_typed(dumped)
+
+        # Should deserialize without blocking
+        assert "blocked" not in caplog.text.lower()
+        assert result == obj
+
+    def test_original_still_blocks_after_with_allowlist(
+        self, caplog: pytest.LogCaptureFixture
+    ) -> None:
+        """Original serde should still block after _with_msgpack_allowlist creates a new one."""
+        inner = JsonPlusSerializer(allowed_msgpack_modules=None)
+        encrypted = EncryptedSerializer.from_pycryptodome_aes(
+            serde=inner, key=b"1234567890123456"
+        )
+
+        # Apply allowlist - this should create a NEW serde
+        _with_msgpack_allowlist(
+            encrypted,
+            [("tests.test_encrypted", "MyPydantic")],
+        )
+
+        # Original should still block
+        obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+        caplog.clear()
+        dumped = encrypted.dumps_typed(obj)
+        result = encrypted.loads_typed(dumped)
+
+        assert "blocked" in caplog.text.lower()
+        assert result == obj.model_dump()
+
+
+class TestEncryptedSerializerUnencryptedFallback:
+    """Test that EncryptedSerializer handles unencrypted data correctly."""
+
+    def test_loads_unencrypted_data(self) -> None:
+        """EncryptedSerializer should handle unencrypted data for backwards compat."""
+        plain = JsonPlusSerializer(allowed_msgpack_modules=None)
+        encrypted = _make_encrypted_serde(allowed_msgpack_modules=None)
+
+        obj = {"key": "value", "number": 42}
+
+        # Serialize with plain serde
+        dumped = plain.dumps_typed(obj)
+        assert "+aes" not in dumped[0]
+
+        # Should still deserialize with encrypted serde
+        result = encrypted.loads_typed(dumped)
+        assert result == obj
+
+
+def test_with_allowlist_uses_copy_protocol() -> None:
+    class CopyAwareSaver(BaseCheckpointSaver[str]):
+        def __init__(self) -> None:
+            super().__init__(serde=JsonPlusSerializer(allowed_msgpack_modules=None))
+            self.copy_was_used = False
+
+        def __copy__(self) -> object:
+            clone = object.__new__(self.__class__)
+            clone.__dict__ = self.__dict__.copy()
+            clone.copy_was_used = True
+            return clone
+
+    saver = CopyAwareSaver()
+
+    updated = saver.with_allowlist([("tests.test_encrypted", "MyPydantic")])
+
+    assert isinstance(updated, CopyAwareSaver)
+    assert updated is not saver
+    assert updated.copy_was_used is True
+    assert saver.copy_was_used is False

libs/checkpoint/tests/test_jsonplus.py

@@ -1,5 +1,6 @@
 import dataclasses
 import json
+import logging
 import pathlib
 import re
 import sys
@@ -13,15 +14,26 @@ from zoneinfo import ZoneInfo
 
 import dataclasses_json
 import numpy as np
+import ormsgpack
 import pandas as pd
 import pytest
+from langchain_core.documents.base import Document
+from langchain_core.messages import HumanMessage
 from pydantic import BaseModel, SecretStr
 from pydantic.v1 import BaseModel as BaseModelV1
 from pydantic.v1 import SecretStr as SecretStrV1
 
+from langgraph.checkpoint.serde import _msgpack as _lg_msgpack
+from langgraph.checkpoint.serde._msgpack import AllowedMsgpackModules
+from langgraph.checkpoint.serde.event_hooks import (
+    SerdeEvent,
+    register_serde_event_listener,
+)
 from langgraph.checkpoint.serde.jsonplus import (
+    EXT_METHOD_SINGLE_ARG,
     InvalidModuleError,
     JsonPlusSerializer,
+    _msgpack_enc,
     _msgpack_ext_hook_to_json,
 )
 from langgraph.store.base import Item
@@ -37,6 +49,10 @@ class MyPydantic(BaseModel):
     inner: InnerPydantic
 
 
+class AnotherPydantic(BaseModel):
+    foo: str
+
+
 class InnerPydanticV1(BaseModelV1):
     hello: str
 
@@ -138,7 +154,27 @@ def test_serde_jsonplus() -> None:
         )
         to_serialize["my_secret_str_v1"] = SecretStrV1("meow")
 
-    serde = JsonPlusSerializer()
+    allowed_msgpack_modules: AllowedMsgpackModules = [
+        InnerDataclass,
+        MyDataclass,
+        MyDataclassWSlots,
+        MyEnum,
+        InnerPydantic,
+        MyPydantic,
+        # Testing that it supports both.
+        (Person.__module__, Person.__name__),
+        (SecretStr.__module__, SecretStr.__name__),
+    ]
+    if sys.version_info < (3, 14):
+        allowed_msgpack_modules.extend(  # type: ignore
+            [
+                (InnerPydanticV1.__module__, InnerPydanticV1.__name__),
+                (MyPydanticV1.__module__, MyPydanticV1.__name__),
+                (SecretStrV1.__module__, SecretStrV1.__name__),
+            ]
+        )
+
+    serde = JsonPlusSerializer(allowed_msgpack_modules=allowed_msgpack_modules)
 
     dumped = serde.dumps_typed(to_serialize)
 
@@ -512,5 +548,438 @@ def test_serde_jsonplus_pandas_series(series: pd.Series) -> None:
 
     assert dumped[0] == "pickle"
     result = serde.loads_typed(dumped)
-
     assert result.equals(series)
+
+
+def test_msgpack_safe_types_no_warning(caplog: pytest.LogCaptureFixture) -> None:
+    """Test safe types deserialize without warnings."""
+
+    serde = JsonPlusSerializer()
+
+    safe_objects = [
+        datetime.now(),
+        date.today(),
+        time(12, 30),
+        timezone.utc,
+        uuid.uuid4(),
+        Decimal("123.45"),
+        {1, 2, 3},
+        frozenset([1, 2, 3]),
+        deque([1, 2, 3]),
+        IPv4Address("192.168.1.1"),
+        pathlib.Path("/tmp/test"),
+    ]
+
+    for obj in safe_objects:
+        caplog.clear()
+        dumped = serde.dumps_typed(obj)
+        result = serde.loads_typed(dumped)
+        assert "unregistered type" not in caplog.text.lower(), (
+            f"Unexpected warning for {type(obj)}"
+        )
+        assert result is not None
+
+
+def test_msgpack_pydantic_warns_by_default(caplog: pytest.LogCaptureFixture) -> None:
+    """Pydantic models not in allowlist should log warning but still deserialize."""
+    current = _lg_msgpack.STRICT_MSGPACK_ENABLED
+    _lg_msgpack.STRICT_MSGPACK_ENABLED = False
+    serde = JsonPlusSerializer()
+
+    obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+    caplog.clear()
+    dumped = serde.dumps_typed(obj)
+    result = serde.loads_typed(dumped)
+
+    assert "unregistered type" in caplog.text.lower()
+    assert "allowed_msgpack_modules" in caplog.text
+    assert result == obj
+    _lg_msgpack.STRICT_MSGPACK_ENABLED = current
+
+
+def test_msgpack_env_strict_default(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Strict msgpack env should default to blocking unregistered types."""
+    current = _lg_msgpack.STRICT_MSGPACK_ENABLED
+    _lg_msgpack.STRICT_MSGPACK_ENABLED = True
+    serde = JsonPlusSerializer()
+
+    obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+    caplog.clear()
+    dumped = serde.dumps_typed(obj)
+    result = serde.loads_typed(dumped)
+
+    assert "blocked" in caplog.text.lower()
+    assert result == obj.model_dump()
+    _lg_msgpack.STRICT_MSGPACK_ENABLED = current
+
+
+def test_msgpack_allowlist_silences_warning(caplog: pytest.LogCaptureFixture) -> None:
+    """Types in allowed_msgpack_modules should deserialize without warnings."""
+
+    serde = JsonPlusSerializer(
+        allowed_msgpack_modules=[
+            ("tests.test_jsonplus", "MyPydantic"),
+            ("tests.test_jsonplus", "InnerPydantic"),
+        ]
+    )
+
+    obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+    caplog.clear()
+    dumped = serde.dumps_typed(obj)
+    result = serde.loads_typed(dumped)
+
+    assert "unregistered type" not in caplog.text.lower()
+    assert result == obj
+
+
+def test_msgpack_none_blocks_unregistered(caplog: pytest.LogCaptureFixture) -> None:
+    """allowed_msgpack_modules=None should block unregistered types."""
+
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+
+    obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+    caplog.clear()
+    dumped = serde.dumps_typed(obj)
+    result = serde.loads_typed(dumped)
+
+    assert "blocked" in caplog.text.lower()
+    expected = obj.model_dump()
+    assert result == expected
+
+
+def test_msgpack_allowlist_blocks_non_listed(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Allowlists should block unregistered types even if msgpack is enabled."""
+
+    serde = JsonPlusSerializer(
+        allowed_msgpack_modules=[("tests.test_jsonplus", "MyPydantic")]
+    )
+
+    obj = AnotherPydantic(foo="nope")
+
+    caplog.clear()
+    dumped = serde.dumps_typed(obj)
+    result = serde.loads_typed(dumped)
+
+    assert "blocked" in caplog.text.lower()
+    expected = obj.model_dump()
+    # It's not allowed, so we just leave it as a dict
+    assert result == expected
+
+
+def test_msgpack_blocked_emits_event() -> None:
+    events: list[SerdeEvent] = []
+    unregister = register_serde_event_listener(events.append)
+    try:
+        serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+        obj = AnotherPydantic(foo="nope")
+        serde.loads_typed(serde.dumps_typed(obj))
+    finally:
+        unregister()
+
+    assert {
+        "kind": "msgpack_blocked",
+        "module": "tests.test_jsonplus",
+        "name": "AnotherPydantic",
+    } in events
+
+
+def test_msgpack_unregistered_allowed_emits_event() -> None:
+    events: list[SerdeEvent] = []
+    unregister = register_serde_event_listener(events.append)
+    try:
+        serde = JsonPlusSerializer(allowed_msgpack_modules=True)
+        obj = AnotherPydantic(foo="ok")
+        serde.loads_typed(serde.dumps_typed(obj))
+    finally:
+        unregister()
+
+    assert {
+        "kind": "msgpack_unregistered_allowed",
+        "module": "tests.test_jsonplus",
+        "name": "AnotherPydantic",
+    } in events
+
+
+def test_msgpack_strict_allows_safe_types(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Safe types should still deserialize in strict mode without warnings."""
+
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    safe = uuid.uuid4()
+
+    caplog.clear()
+    dumped = serde.dumps_typed(safe)
+    result = serde.loads_typed(dumped)
+
+    assert "blocked" not in caplog.text.lower()
+    assert result == safe
+
+
+def test_msgpack_strict_allows_core_langchain_messages(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    msg = HumanMessage(content="hello")
+
+    caplog.clear()
+    result = serde.loads_typed(serde.dumps_typed(msg))
+
+    assert "blocked" not in caplog.text.lower()
+    assert "unregistered" not in caplog.text.lower()
+    assert isinstance(result, HumanMessage)
+    assert result == msg
+
+
+def test_msgpack_strict_allows_langchain_document(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    doc = Document(page_content="hello", metadata={"k": "v"})
+
+    caplog.clear()
+    result = serde.loads_typed(serde.dumps_typed(doc))
+
+    assert "blocked" not in caplog.text.lower()
+    assert "unregistered" not in caplog.text.lower()
+    assert isinstance(result, Document)
+    assert result == doc
+
+
+def test_msgpack_regex_safe_type(caplog: pytest.LogCaptureFixture) -> None:
+    """re.compile patterns should deserialize without warnings as a safe type."""
+
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    pattern = re.compile(r"foo.*bar", re.IGNORECASE | re.DOTALL)
+
+    caplog.clear()
+    dumped = serde.dumps_typed(pattern)
+    result = serde.loads_typed(dumped)
+
+    assert "blocked" not in caplog.text.lower()
+    assert "unregistered" not in caplog.text.lower()
+    assert result.pattern == pattern.pattern
+    assert result.flags == pattern.flags
+
+
+def test_msgpack_method_pathlib_blocked_in_strict(
+    tmp_path: pathlib.Path, caplog: pytest.LogCaptureFixture
+) -> None:
+    target = tmp_path / "secret.txt"
+    target.write_text("secret")
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    payload = ormsgpack.packb(
+        ormsgpack.Ext(
+            EXT_METHOD_SINGLE_ARG,
+            _msgpack_enc(("pathlib", "Path", target, "read_text")),
+        ),
+        option=ormsgpack.OPT_NON_STR_KEYS,
+    )
+
+    caplog.set_level(logging.WARNING, logger="langgraph.checkpoint.serde.jsonplus")
+    caplog.clear()
+    result = serde.loads_typed(("msgpack", payload))
+
+    assert result == target
+    assert "blocked deserialization of method call pathlib.path.read_text" in (
+        caplog.text.lower()
+    )
+
+
+def test_msgpack_method_pathlib_blocked_default_mode(
+    tmp_path: pathlib.Path, caplog: pytest.LogCaptureFixture
+) -> None:
+    target = tmp_path / "secret.txt"
+    target.write_text("secret")
+    serde = JsonPlusSerializer(allowed_msgpack_modules=True)
+    payload = ormsgpack.packb(
+        ormsgpack.Ext(
+            EXT_METHOD_SINGLE_ARG,
+            _msgpack_enc(("pathlib", "Path", target, "read_text")),
+        ),
+        option=ormsgpack.OPT_NON_STR_KEYS,
+    )
+
+    caplog.set_level(logging.WARNING, logger="langgraph.checkpoint.serde.jsonplus")
+    caplog.clear()
+    result = serde.loads_typed(("msgpack", payload))
+
+    assert result == target
+    assert "blocked deserialization of method call pathlib.path.read_text" in (
+        caplog.text.lower()
+    )
+
+
+def test_msgpack_regex_still_works_strict(caplog: pytest.LogCaptureFixture) -> None:
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    pattern = re.compile(r"pattern", re.IGNORECASE | re.MULTILINE)
+
+    caplog.clear()
+    result = serde.loads_typed(serde.dumps_typed(pattern))
+
+    assert "blocked" not in caplog.text.lower()
+    assert result.pattern == pattern.pattern
+    assert result.flags == pattern.flags
+
+
+def test_msgpack_path_constructor_still_works() -> None:
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    path_obj = pathlib.Path("/tmp/foo")
+
+    result = serde.loads_typed(serde.dumps_typed(path_obj))
+
+    assert result == path_obj
+
+
+def test_with_msgpack_allowlist_noop_returns_same_instance() -> None:
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+
+    result = serde.with_msgpack_allowlist(())
+
+    assert result is serde
+
+
+def test_with_msgpack_allowlist_supports_subclass_without_init_kwargs() -> None:
+    class CustomSerializer(JsonPlusSerializer):
+        def __init__(self) -> None:
+            super().__init__(allowed_msgpack_modules=None)
+
+    serde = CustomSerializer()
+    result = serde.with_msgpack_allowlist([MyDataclass])
+
+    assert isinstance(result, CustomSerializer)
+    assert result is not serde
+    assert serde._allowed_msgpack_modules is None
+    assert result._allowed_msgpack_modules == {
+        (MyDataclass.__module__, MyDataclass.__name__)
+    }
+
+
+def test_with_msgpack_allowlist_rebuilds_default_unpack_hook() -> None:
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    original_hook = serde._unpack_ext_hook
+
+    result = serde.with_msgpack_allowlist([MyDataclass])
+
+    assert result._unpack_ext_hook is not original_hook
+
+
+def test_with_msgpack_allowlist_preserves_custom_unpack_hook() -> None:
+    def custom_hook(code: int, data: bytes) -> None:
+        return None
+
+    serde = JsonPlusSerializer(
+        allowed_msgpack_modules=None, __unpack_ext_hook__=custom_hook
+    )
+    result = serde.with_msgpack_allowlist([MyDataclass])
+
+    assert result._unpack_ext_hook is custom_hook
+
+
+@pytest.mark.skipif(sys.version_info >= (3, 14), reason="pydantic v1 not on 3.14+")
+def test_msgpack_pydantic_v1_allowlist(caplog: pytest.LogCaptureFixture) -> None:
+    """Pydantic v1 models in allowlist should deserialize without warnings."""
+
+    serde = JsonPlusSerializer(
+        allowed_msgpack_modules=[
+            ("tests.test_jsonplus", "MyPydanticV1"),
+            ("tests.test_jsonplus", "InnerPydanticV1"),
+        ]
+    )
+
+    obj = MyPydanticV1(foo="test", bar=42, inner=InnerPydanticV1(hello="world"))
+
+    caplog.clear()
+    dumped = serde.dumps_typed(obj)
+    result = serde.loads_typed(dumped)
+
+    assert "unregistered type" not in caplog.text.lower()
+    assert "blocked" not in caplog.text.lower()
+    assert result == obj
+
+
+def test_msgpack_dataclass_allowlist(caplog: pytest.LogCaptureFixture) -> None:
+    """Dataclasses in allowlist should deserialize without warnings."""
+
+    serde = JsonPlusSerializer(
+        allowed_msgpack_modules=[
+            ("tests.test_jsonplus", "MyDataclass"),
+            ("tests.test_jsonplus", "InnerDataclass"),
+        ]
+    )
+
+    obj = MyDataclass(foo="test", bar=42, inner=InnerDataclass(hello="world"))
+
+    caplog.clear()
+    dumped = serde.dumps_typed(obj)
+    result = serde.loads_typed(dumped)
+
+    assert "unregistered type" not in caplog.text.lower()
+    assert "blocked" not in caplog.text.lower()
+    assert result == obj
+
+
+def test_msgpack_safe_types_value_equality(caplog: pytest.LogCaptureFixture) -> None:
+    """Verify safe types are correctly restored with proper values."""
+
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+
+    test_cases = [
+        datetime(2024, 1, 15, 12, 30, 45, 123456),
+        date(2024, 6, 15),
+        time(14, 30, 0),
+        uuid.UUID("12345678-1234-5678-1234-567812345678"),
+        Decimal("123.456789"),
+        {1, 2, 3, 4, 5},
+        frozenset(["a", "b", "c"]),
+        deque([1, 2, 3]),
+        IPv4Address("10.0.0.1"),
+        pathlib.Path("/some/test/path"),
+        re.compile(r"\d+", re.MULTILINE),
+    ]
+
+    for obj in test_cases:
+        caplog.clear()
+        dumped = serde.dumps_typed(obj)
+        result = serde.loads_typed(dumped)
+
+        assert "blocked" not in caplog.text.lower(), f"Blocked for {type(obj)}"
+        # For regex patterns, compare pattern and flags
+        if isinstance(obj, re.Pattern):
+            assert result.pattern == obj.pattern
+            assert result.flags == obj.flags
+        else:
+            assert result == obj, f"Value mismatch for {type(obj)}: {result} != {obj}"
+
+
+def test_msgpack_nested_pydantic_serializes_as_dict(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Nested Pydantic models are serialized via model_dump() as dicts.
+
+    This means nested models don't go through the ext hook and don't need
+    to be in the allowlist - only the outer type does.
+    """
+
+    # Only allow outer type - inner is serialized as dict via model_dump()
+    serde = JsonPlusSerializer(
+        allowed_msgpack_modules=[("tests.test_jsonplus", "MyPydantic")]
+    )
+
+    obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
+
+    caplog.clear()
+    dumped = serde.dumps_typed(obj)
+    result = serde.loads_typed(dumped)
+
+    # No blocking should occur - inner is serialized as dict, not ext
+    assert "blocked" not in caplog.text.lower()
+    assert result == obj

libs/checkpoint/tests/test_memory.py

@@ -1,7 +1,9 @@
+import logging
 from typing import Any
 
 import pytest
 from langchain_core.runnables import RunnableConfig
+from pydantic import BaseModel
 
 from langgraph.checkpoint.base import (
     Checkpoint,
@@ -10,6 +12,11 @@ from langgraph.checkpoint.base import (
     empty_checkpoint,
 )
 from langgraph.checkpoint.memory import InMemorySaver
+from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
+
+
+class MemoryPydantic(BaseModel):
+    foo: str
 
 
 class TestMemorySaver:
@@ -199,3 +206,105 @@ async def test_memory_saver() -> None:
 
     with memory_saver as sync_memory_saver:
         assert sync_memory_saver is memory_saver
+
+
+def test_memory_saver_warns_on_unregistered_msgpack(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    serde = JsonPlusSerializer()
+    memory_saver = InMemorySaver(serde=serde)
+    obj = MemoryPydantic(foo="bar")
+
+    checkpoint = empty_checkpoint()
+    checkpoint["channel_values"] = {"foo": obj}
+    checkpoint["channel_versions"] = {"foo": 1}
+
+    config: RunnableConfig = {
+        "configurable": {"thread_id": "thread-1", "checkpoint_ns": ""}
+    }
+
+    caplog.set_level(logging.WARNING, logger="langgraph.checkpoint.serde.jsonplus")
+    new_config = memory_saver.put(config, checkpoint, {}, {"foo": 1})
+    result = memory_saver.get_tuple(new_config)
+
+    assert result is not None
+    assert "unregistered type" in caplog.text.lower()
+    assert result.checkpoint["channel_values"]["foo"] == obj
+
+
+def test_memory_saver_allowlist_silences_warning(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    serde = JsonPlusSerializer(
+        allowed_msgpack_modules=[("tests.test_memory", "MemoryPydantic")]
+    )
+    memory_saver = InMemorySaver(serde=serde)
+    obj = MemoryPydantic(foo="bar")
+
+    checkpoint = empty_checkpoint()
+    checkpoint["channel_values"] = {"foo": obj}
+    checkpoint["channel_versions"] = {"foo": 1}
+
+    config: RunnableConfig = {
+        "configurable": {"thread_id": "thread-1", "checkpoint_ns": ""}
+    }
+
+    caplog.set_level(logging.WARNING, logger="langgraph.checkpoint.serde.jsonplus")
+    new_config = memory_saver.put(config, checkpoint, {}, {"foo": 1})
+    result = memory_saver.get_tuple(new_config)
+
+    assert result is not None
+    assert "unregistered type" not in caplog.text.lower()
+    assert result.checkpoint["channel_values"]["foo"] == obj
+
+
+def test_memory_saver_strict_blocks_unregistered(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    memory_saver = InMemorySaver(serde=serde)
+    obj = MemoryPydantic(foo="bar")
+
+    checkpoint = empty_checkpoint()
+    checkpoint["channel_values"] = {"foo": obj}
+    checkpoint["channel_versions"] = {"foo": 1}
+
+    config: RunnableConfig = {
+        "configurable": {"thread_id": "thread-1", "checkpoint_ns": ""}
+    }
+
+    caplog.set_level(logging.WARNING, logger="langgraph.checkpoint.serde.jsonplus")
+    new_config = memory_saver.put(config, checkpoint, {}, {"foo": 1})
+    result = memory_saver.get_tuple(new_config)
+
+    assert result is not None
+    assert "blocked" in caplog.text.lower()
+    expected = obj.model_dump() if hasattr(obj, "model_dump") else obj.dict()
+    assert result.checkpoint["channel_values"]["foo"] == expected
+
+
+def test_memory_saver_with_allowlist_proxy_isolated() -> None:
+    serde = JsonPlusSerializer(allowed_msgpack_modules=None)
+    memory_saver = InMemorySaver(serde=serde)
+    proxy = memory_saver.with_allowlist([("tests.test_memory", "MemoryPydantic")])
+
+    obj = MemoryPydantic(foo="bar")
+
+    checkpoint = empty_checkpoint()
+    checkpoint["channel_values"] = {"foo": obj}
+    checkpoint["channel_versions"] = {"foo": 1}
+
+    config: RunnableConfig = {
+        "configurable": {"thread_id": "thread-1", "checkpoint_ns": ""}
+    }
+
+    new_config = proxy.put(config, checkpoint, {}, {"foo": 1})
+
+    proxied = proxy.get_tuple(new_config)
+    assert proxied is not None
+    assert proxied.checkpoint["channel_values"]["foo"] == obj
+
+    direct = memory_saver.get_tuple(new_config)
+    assert direct is not None
+    expected = obj.model_dump() if hasattr(obj, "model_dump") else obj.dict()
+    assert direct.checkpoint["channel_values"]["foo"] == expected

libs/checkpoint/uv.lock

@@ -267,7 +267,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.2.13"
+version = "1.2.14"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -279,14 +279,14 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
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+    { url = "https://files.pythonhosted.org/packages/71/41/fe6ae9065b866b1397adbfc98db5e1648e8dcd78126b8e1266fcbe2d6395/langchain_core-1.2.14-py3-none-any.whl", hash = "sha256:b349ca28c057ac1f9b5280ea091bddb057db24d0f1c3c89bbb590713e1715838", size = 501411, upload-time = "2026-02-19T14:22:32.013Z" },
 ]
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.0.0"
+version = "4.0.1"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },
@@ -302,6 +302,7 @@ dev = [
     { name = "numpy", version = "2.4.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.11'" },
     { name = "pandas" },
     { name = "pandas-stubs" },
+    { name = "pycryptodome" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -341,6 +342,7 @@ dev = [
     { name = "numpy" },
     { name = "pandas" },
     { name = "pandas-stubs", specifier = ">=2.2.2.240807" },
+    { name = "pycryptodome", specifier = ">=3.23.0" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
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 ]
 
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 ]
 
 [[package]]

libs/cli/Makefile

@@ -1,4 +1,4 @@
-.PHONY: test lint format test-integration update-schema bump-version
+.PHONY: test lint type format test-integration update-schema bump-version
 
 ######################
 # TESTING AND COVERAGE
@@ -29,6 +29,9 @@ lint lint_diff lint_package lint_tests:
 	[ "$(PYTHON_FILES)" = "" ] || uv run ruff check --select I $(PYTHON_FILES)
 	[ "$(PYTHON_FILES)" = "" ] || mkdir -p $(MYPY_CACHE) || uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)
 
+type:
+	mkdir -p $(MYPY_CACHE) && uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)
+
 format format_diff:
 	uv run ruff format $(PYTHON_FILES)
 	uv run ruff check --select I --fix $(PYTHON_FILES)

libs/cli/generate_schema.py

@@ -20,6 +20,7 @@ from langgraph_cli.schemas import (
     Config,
     ConfigurableHeaderConfig,
     CorsConfig,
+    GraphDef,
     HttpConfig,
     IndexConfig,
     SecurityConfig,
@@ -108,6 +109,7 @@ def add_descriptions_to_schema(schema, cls):
             # Find the class that corresponds to this definition
             for potential_cls in [
                 Config,
+                GraphDef,
                 StoreConfig,
                 IndexConfig,
                 AuthConfig,

libs/cli/js-examples/package.json

@@ -21,8 +21,8 @@
     "test:all": "yarn test && yarn test:int && yarn lint:langgraph"
   },
   "dependencies": {
-    "@langchain/core": "^1.1.24",
-    "@langchain/langgraph": "^1.1.4"
+    "@langchain/core": "^1.1.27",
+    "@langchain/langgraph": "^1.1.5"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.3",
@@ -32,7 +32,7 @@
     "@typescript-eslint/eslint-plugin": "^8.56.0",
     "@typescript-eslint/parser": "^8.56.0",
     "dotenv": "^17.3.1",
-    "eslint": "^10.0.0",
+    "eslint": "^10.0.1",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.32.0",
     "eslint-plugin-no-instanceof": "^1.0.1",

libs/cli/js-examples/yarn.lock

@@ -474,14 +474,14 @@
   resolved "https://registry.yarnpkg.com/@eslint-community/regexpp/-/regexpp-4.12.2.tgz#bccdf615bcf7b6e8db830ec0b8d21c9a25de597b"
   integrity sha512-EriSTlt5OC9/7SXkRSCAhfSxxoSUgBm33OH+IkwbdpgoqsSsUg7y3uh+IICI/Qg4BBWr3U2i39RpmycbxMq4ew==
 
-"@eslint/config-array@^0.23.0":
-  version "0.23.1"
-  resolved "https://registry.yarnpkg.com/@eslint/config-array/-/config-array-0.23.1.tgz#908223da7b9148f1af5bfb3144b77a9387a89446"
-  integrity sha512-uVSdg/V4dfQmTjJzR0szNczjOH/J+FyUMMjYtr07xFRXR7EDf9i1qdxrD0VusZH9knj1/ecxzCQQxyic5NzAiA==
+"@eslint/config-array@^0.23.2":
+  version "0.23.2"
+  resolved "https://registry.yarnpkg.com/@eslint/config-array/-/config-array-0.23.2.tgz#db85beeff7facc685a5775caacb1c845669b9470"
+  integrity sha512-YF+fE6LV4v5MGWRGj7G404/OZzGNepVF8fxk7jqmqo3lrza7a0uUcDnROGRBG1WFC1omYUS/Wp1f42i0M+3Q3A==
   dependencies:
-    "@eslint/object-schema" "^3.0.1"
+    "@eslint/object-schema" "^3.0.2"
     debug "^4.3.1"
-    minimatch "^10.1.1"
+    minimatch "^10.2.1"
 
 "@eslint/config-helpers@^0.5.2":
   version "0.5.2"
@@ -517,10 +517,10 @@
   resolved "https://registry.yarnpkg.com/@eslint/js/-/js-10.0.1.tgz#1e8a876f50117af8ab67e47d5ad94d38d6622583"
   integrity sha512-zeR9k5pd4gxjZ0abRoIaxdc7I3nDktoXZk2qOv9gCNWx3mVwEn32VRhyLaRsDiJjTs0xq/T8mfPtyuXu7GWBcA==
 
-"@eslint/object-schema@^3.0.1":
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.1.tgz#9a1dc9af00d790dc79a9bf57a756e3cb2740ddb9"
-  integrity sha512-P9cq2dpr+LU8j3qbLygLcSZrl2/ds/pUpfnHNNuk5HW7mnngHs+6WSq5C9mO3rqRX8A1poxqLTC9cu0KOyJlBg==
+"@eslint/object-schema@^3.0.2":
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.2.tgz#c59c6a94aa4b428ed7f1615b6a4495c0a21f7a22"
+  integrity sha512-HOy56KJt48Bx8KmJ+XGQNSUMT/6dZee/M54XyUyuvTvPXJmsERRvBchsUVx1UMe1WwIH49XLAczNC7V2INsuUw==
 
 "@eslint/plugin-kit@^0.6.0":
   version "0.6.0"
@@ -867,10 +867,10 @@
     "@jridgewell/resolve-uri" "^3.1.0"
     "@jridgewell/sourcemap-codec" "^1.4.14"
 
-"@langchain/core@^1.1.24":
-  version "1.1.24"
-  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.24.tgz#714f5d953c3887104616386a404fa5d5d29e8d9b"
-  integrity sha512-u6l0dmMHN/2PCsY6stXoh9CH1OTlVR5Gjz0JjT1XRPuidAlu3kTq4ivW95xCog/PRhiAsCh6GCEC4/PqhNrcgQ==
+"@langchain/core@^1.1.27":
+  version "1.1.27"
+  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.27.tgz#b5a05c014eef2973006fd9e0df1e135b9da640e2"
+  integrity sha512-YVtEz3nqCh8WxtdVXUICmt2BR2An+mn4YRJUBwcHX47Yrh2VwxpO0l97B2N/sNi658m65HnGyz2/hAjF3fzc1w==
   dependencies:
     "@cfworker/json-schema" "^4.0.2"
     ansi-styles "^5.0.0"
@@ -890,23 +890,23 @@
   dependencies:
     uuid "^10.0.0"
 
-"@langchain/langgraph-sdk@~1.6.0":
-  version "1.6.2"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.6.2.tgz#3b5d0707ddb844fd288cfacb81bb1b726ea7ee5f"
-  integrity sha512-UzRZsnDqdTmeitf/K5yZnVdl+V+7bDj/hQUXm+Y8TwWUuKtWUDocIReKgAmPQLoIz0AN8bOUt0QGnIISmCZyuA==
+"@langchain/langgraph-sdk@~2.0.0":
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-2.0.0.tgz#55ac46373aa4917443d92c8b2edd5efd162bc879"
+  integrity sha512-Xdkl1hve84ZGQ7fgpiBIBvjODhtjbPPccY4snOtYgSdzRXZkESsi2Y7RDKgFe1nC9+DbX+QaYom0raD/XFBKAw==
   dependencies:
     "@types/json-schema" "^7.0.15"
     p-queue "^9.0.1"
     p-retry "^7.1.1"
     uuid "^13.0.0"
 
-"@langchain/langgraph@^1.1.4":
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.1.4.tgz#9eb2ca3bf03329a16d0bd8ae734fdd139d5862f8"
-  integrity sha512-9OhRF+7Zvcpure8TLtBrxfJDo0PAoHZhfzcPL6M3CsGXiYqLWm5tQe+FYqn9zRIV7IwphqVEl1QDNbOkVgo+kw==
+"@langchain/langgraph@^1.1.5":
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.1.5.tgz#7cab6c585b5e60ac52e70ef941ba6054f45b0d88"
+  integrity sha512-uJC/asydf/GoHpo9x42lf9hs8ufCkMuJ9sDle5ybP7sMD0XryOfE0E4J3deARk9ZadCCt6zeCoCNu/mTbx8+Sg==
   dependencies:
     "@langchain/langgraph-checkpoint" "^1.0.0"
-    "@langchain/langgraph-sdk" "~1.6.0"
+    "@langchain/langgraph-sdk" "~2.0.0"
     "@standard-schema/spec" "1.1.0"
     uuid "^10.0.0"
 
@@ -1287,10 +1287,10 @@ acorn@^8.12.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.12.1.tgz#71616bdccbe25e27a54439e0046e89ca76df2248"
   integrity sha512-tcpGyI9zbizT9JbV6oYE477V6mTlXvvi0T0G3SNIYE2apm/G5huBa1+K89VGeovbg+jycCrfhl3ADxErOuO6Jg==
 
-acorn@^8.15.0:
-  version "8.15.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.15.0.tgz#a360898bc415edaac46c8241f6383975b930b816"
-  integrity sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==
+acorn@^8.16.0:
+  version "8.16.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.16.0.tgz#4ce79c89be40afe7afe8f3adb902a1f1ce9ac08a"
+  integrity sha512-UVJyE9MttOsBQIDKw1skb9nAwQuR5wuGD3+82K6JgJlm/Y+KI92oNsMNGZCYdDsVtRHSak0pcV5Dno5+4jh9sw==
 
 ajv@^6.12.4:
   version "6.12.6"
@@ -1555,10 +1555,10 @@ brace-expansion@^1.1.7:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
-brace-expansion@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-2.0.1.tgz#1edc459e0f0c548486ecf9fc99f2221364b9a0ae"
-  integrity sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==
+brace-expansion@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-2.0.2.tgz#54fc53237a613d854c7bd37463aad17df87214e7"
+  integrity sha512-Jt0vHyM+jmUBqojB7E1NIYadt0vI0Qxjxd2TErW94wDz+E2LAm5vKMXXwg6ZZBTHPuUlDgQHKXvjGBdfcF1ZDQ==
   dependencies:
     balanced-match "^1.0.0"
 
@@ -2226,10 +2226,10 @@ eslint-plugin-prettier@^5.5.5:
     prettier-linter-helpers "^1.0.1"
     synckit "^0.11.12"
 
-eslint-scope@^9.1.0:
-  version "9.1.0"
-  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-9.1.0.tgz#dfcb41d6c0d73df6b977a50cf3e91c41ddb4154e"
-  integrity sha512-CkWE42hOJsNj9FJRaoMX9waUFYhqY4jmyLFdAdzZr6VaCg3ynLYx4WnOdkaIifGfH4gsUcBTn4OZbHXkpLD0FQ==
+eslint-scope@^9.1.1:
+  version "9.1.1"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-9.1.1.tgz#f6a209486e38bd28356b5feb07d445cc99c89967"
+  integrity sha512-GaUN0sWim5qc8KVErfPBWmc31LEsOkrUJbvJZV+xuL3u2phMUK4HIvXlWAakfC8W4nzlK+chPEAkYOYb5ZScIw==
   dependencies:
     "@types/esrecurse" "^4.3.1"
     "@types/estree" "^1.0.8"
@@ -2246,19 +2246,19 @@ eslint-visitor-keys@^4.0.0:
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-4.2.1.tgz#4cfea60fe7dd0ad8e816e1ed026c1d5251b512c1"
   integrity sha512-Uhdk5sfqcee/9H/rCOJikYz67o0a2Tw2hGRPOG2Y1R2dg7brRe1uG0yaNQDHu+TO/uQPF/5eCapvYSmHUjt7JQ==
 
-eslint-visitor-keys@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-5.0.0.tgz#b9aa1a74aa48c44b3ae46c1597ce7171246a94a9"
-  integrity sha512-A0XeIi7CXU7nPlfHS9loMYEKxUaONu/hTEzHTGba9Huu94Cq1hPivf+DE5erJozZOky0LfvXAyrV/tcswpLI0Q==
+eslint-visitor-keys@^5.0.0, eslint-visitor-keys@^5.0.1:
+  version "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@^10.0.0:
-  version "10.0.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.0.0.tgz#c93c36a96d91621d0fbb680db848ea11af56ab1e"
-  integrity sha512-O0piBKY36YSJhlFSG8p9VUdPV/SxxS4FYDWVpr/9GJuMaepzwlf4J8I4ov1b+ySQfDTPhc3DtLaxcT1fN0yqCg==
+eslint@^10.0.1:
+  version "10.0.1"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.0.1.tgz#b5c5f7706782a21590ba6451e7a30d2947273c2d"
+  integrity sha512-20MV9SUdeN6Jd84xESsKhRly+/vxI+hwvpBMA93s+9dAcjdCuCojn4IqUGS3lvVaqjVYGYHSRMCpeFtF2rQYxQ==
   dependencies:
     "@eslint-community/eslint-utils" "^4.8.0"
     "@eslint-community/regexpp" "^4.12.2"
-    "@eslint/config-array" "^0.23.0"
+    "@eslint/config-array" "^0.23.2"
     "@eslint/config-helpers" "^0.5.2"
     "@eslint/core" "^1.1.0"
     "@eslint/plugin-kit" "^0.6.0"
@@ -2270,9 +2270,9 @@ eslint@^10.0.0:
     cross-spawn "^7.0.6"
     debug "^4.3.2"
     escape-string-regexp "^4.0.0"
-    eslint-scope "^9.1.0"
-    eslint-visitor-keys "^5.0.0"
-    espree "^11.1.0"
+    eslint-scope "^9.1.1"
+    eslint-visitor-keys "^5.0.1"
+    espree "^11.1.1"
     esquery "^1.7.0"
     esutils "^2.0.2"
     fast-deep-equal "^3.1.3"
@@ -2283,7 +2283,7 @@ eslint@^10.0.0:
     imurmurhash "^0.1.4"
     is-glob "^4.0.0"
     json-stable-stringify-without-jsonify "^1.0.1"
-    minimatch "^10.1.1"
+    minimatch "^10.2.1"
     natural-compare "^1.4.0"
     optionator "^0.9.3"
 
@@ -2296,14 +2296,14 @@ espree@^10.0.1:
     acorn-jsx "^5.3.2"
     eslint-visitor-keys "^4.0.0"
 
-espree@^11.1.0:
-  version "11.1.0"
-  resolved "https://registry.yarnpkg.com/espree/-/espree-11.1.0.tgz#7d0c82a69f8df670728dba256264b383fbf73e8f"
-  integrity sha512-WFWYhO1fV4iYkqOOvq8FbqIhr2pYfoDY0kCotMkDeNtGpiGGkZ1iov2u8ydjtgM8yF8rzK7oaTbw2NAzbAbehw==
+espree@^11.1.1:
+  version "11.1.1"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-11.1.1.tgz#866f6bc9ccccd6f28876b7a6463abb281b9cb847"
+  integrity sha512-AVHPqQoZYc+RUM4/3Ly5udlZY/U4LS8pIG05jEjWM2lQMU/oaZ7qshzAl2YP1tfNmXfftH3ohurfwNAug+MnsQ==
   dependencies:
-    acorn "^8.15.0"
+    acorn "^8.16.0"
     acorn-jsx "^5.3.2"
-    eslint-visitor-keys "^5.0.0"
+    eslint-visitor-keys "^5.0.1"
 
 esprima@^4.0.0:
   version "4.0.1"
@@ -3533,9 +3533,9 @@ js-tokens@^4.0.0:
   integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
 
 js-yaml@^3.13.1:
-  version "3.14.1"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.14.1.tgz#dae812fdb3825fa306609a8717383c50c36a0537"
-  integrity sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==
+  version "3.14.2"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.14.2.tgz#77485ce1dd7f33c061fd1b16ecea23b55fcb04b0"
+  integrity sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==
   dependencies:
     argparse "^1.0.7"
     esprima "^4.0.0"
@@ -3699,26 +3699,26 @@ mimic-fn@^2.1.0:
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-2.1.0.tgz#7ed2c2ccccaf84d3ffcb7a69b57711fc2083401b"
   integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
 
-minimatch@^10.1.1:
-  version "10.2.0"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-10.2.0.tgz#e710473e66e3e1aaf376d0aa82438375cac86e9e"
-  integrity sha512-ugkC31VaVg9cF0DFVoADH12k6061zNZkZON+aX8AWsR9GhPcErkcMBceb6znR8wLERM2AkkOxy2nWRLpT9Jq5w==
+minimatch@^10.2.1:
+  version "10.2.4"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-10.2.4.tgz#465b3accbd0218b8281f5301e27cedc697f96fde"
+  integrity sha512-oRjTw/97aTBN0RHbYCdtF1MQfvusSIBQM0IZEgzl6426+8jSC0nF1a/GmnVLpfB9yyr6g6FTqWqiZVbxrtaCIg==
   dependencies:
     brace-expansion "^5.0.2"
 
 minimatch@^3.0.4, minimatch@^3.1.1, minimatch@^3.1.2:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.1.2.tgz#19cd194bfd3e428f049a70817c038d89ab4be35b"
-  integrity sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==
+  version "3.1.5"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.1.5.tgz#580c88f8d5445f2bd6aa8f3cadefa0de79fbd69e"
+  integrity sha512-VgjWUsnnT6n+NUk6eZq77zeFdpW2LWDzP6zFGrCbHXiYNul5Dzqk2HHQ5uFH2DNW5Xbp8+jVzaeNt94ssEEl4w==
   dependencies:
     brace-expansion "^1.1.7"
 
 minimatch@^9.0.4, minimatch@^9.0.5:
-  version "9.0.5"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-9.0.5.tgz#d74f9dd6b57d83d8e98cfb82133b03978bc929e5"
-  integrity sha512-G6T0ZX48xgozx7587koeX9Ys2NYy6Gmv//P89sEte9V9whIapMNF4idKxnW2QtCcLiTWlb/wfCabAtAFWhhBow==
+  version "9.0.9"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-9.0.9.tgz#9b0cb9fcb78087f6fd7eababe2511c4d3d60574e"
+  integrity sha512-OBwBN9AL4dqmETlpS2zasx+vTeWclWzkblfZk7KTA5j3jeOONz/tRCnZomUyvNg83wL5Zv9Ss6HMJXAgL8R2Yg==
   dependencies:
-    brace-expansion "^2.0.1"
+    brace-expansion "^2.0.2"
 
 minimist@^1.2.0, minimist@^1.2.5, minimist@^1.2.6:
   version "1.2.8"

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

@@ -9,8 +9,8 @@
   },
   "dependencies": {
     "@js-monorepo-example/shared": "*",
-    "@langchain/core": "^1.1.24",
-    "@langchain/langgraph": "^1.1.4"
+    "@langchain/core": "^1.1.27",
+    "@langchain/langgraph": "^1.1.5"
   },
   "devDependencies": {
     "typescript": "^5.9.3"

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

@@ -17,12 +17,12 @@
     "lint": "eslint 'apps/**/*.ts' 'libs/**/*.ts'"
   },
   "devDependencies": {
-    "turbo": "^2.8.9",
+    "turbo": "^2.8.10",
     "typescript": "^5.9.3",
     "@tsconfig/recommended": "^1.0.13",
     "@eslint/eslintrc": "^3.3.3",
     "@eslint/js": "^10.0.1",
-    "eslint": "^10.0.0",
+    "eslint": "^10.0.1",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.27.5",
     "eslint-plugin-no-instanceof": "^1.0.1",

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

@@ -19,14 +19,14 @@
   resolved "https://registry.yarnpkg.com/@eslint-community/regexpp/-/regexpp-4.12.2.tgz#bccdf615bcf7b6e8db830ec0b8d21c9a25de597b"
   integrity sha512-EriSTlt5OC9/7SXkRSCAhfSxxoSUgBm33OH+IkwbdpgoqsSsUg7y3uh+IICI/Qg4BBWr3U2i39RpmycbxMq4ew==
 
-"@eslint/config-array@^0.23.0":
-  version "0.23.1"
-  resolved "https://registry.yarnpkg.com/@eslint/config-array/-/config-array-0.23.1.tgz#908223da7b9148f1af5bfb3144b77a9387a89446"
-  integrity sha512-uVSdg/V4dfQmTjJzR0szNczjOH/J+FyUMMjYtr07xFRXR7EDf9i1qdxrD0VusZH9knj1/ecxzCQQxyic5NzAiA==
+"@eslint/config-array@^0.23.2":
+  version "0.23.2"
+  resolved "https://registry.yarnpkg.com/@eslint/config-array/-/config-array-0.23.2.tgz#db85beeff7facc685a5775caacb1c845669b9470"
+  integrity sha512-YF+fE6LV4v5MGWRGj7G404/OZzGNepVF8fxk7jqmqo3lrza7a0uUcDnROGRBG1WFC1omYUS/Wp1f42i0M+3Q3A==
   dependencies:
-    "@eslint/object-schema" "^3.0.1"
+    "@eslint/object-schema" "^3.0.2"
     debug "^4.3.1"
-    minimatch "^10.1.1"
+    minimatch "^10.2.1"
 
 "@eslint/config-helpers@^0.5.2":
   version "0.5.2"
@@ -62,10 +62,10 @@
   resolved "https://registry.yarnpkg.com/@eslint/js/-/js-10.0.1.tgz#1e8a876f50117af8ab67e47d5ad94d38d6622583"
   integrity sha512-zeR9k5pd4gxjZ0abRoIaxdc7I3nDktoXZk2qOv9gCNWx3mVwEn32VRhyLaRsDiJjTs0xq/T8mfPtyuXu7GWBcA==
 
-"@eslint/object-schema@^3.0.1":
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.1.tgz#9a1dc9af00d790dc79a9bf57a756e3cb2740ddb9"
-  integrity sha512-P9cq2dpr+LU8j3qbLygLcSZrl2/ds/pUpfnHNNuk5HW7mnngHs+6WSq5C9mO3rqRX8A1poxqLTC9cu0KOyJlBg==
+"@eslint/object-schema@^3.0.2":
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.2.tgz#c59c6a94aa4b428ed7f1615b6a4495c0a21f7a22"
+  integrity sha512-HOy56KJt48Bx8KmJ+XGQNSUMT/6dZee/M54XyUyuvTvPXJmsERRvBchsUVx1UMe1WwIH49XLAczNC7V2INsuUw==
 
 "@eslint/plugin-kit@^0.6.0":
   version "0.6.0"
@@ -103,10 +103,10 @@
   resolved "https://registry.yarnpkg.com/@isaacs/cliui/-/cliui-9.0.0.tgz#4d0a3f127058043bf2e7ee169eaf30ed901302f3"
   integrity sha512-AokJm4tuBHillT+FpMtxQ60n8ObyXBatq7jD2/JA9dxbDDokKQm8KMht5ibGzLVU9IJDIKK4TPKgMHEYMn3lMg==
 
-"@langchain/core@^1.1.24":
-  version "1.1.24"
-  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.24.tgz#714f5d953c3887104616386a404fa5d5d29e8d9b"
-  integrity sha512-u6l0dmMHN/2PCsY6stXoh9CH1OTlVR5Gjz0JjT1XRPuidAlu3kTq4ivW95xCog/PRhiAsCh6GCEC4/PqhNrcgQ==
+"@langchain/core@^1.1.27":
+  version "1.1.27"
+  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.27.tgz#b5a05c014eef2973006fd9e0df1e135b9da640e2"
+  integrity sha512-YVtEz3nqCh8WxtdVXUICmt2BR2An+mn4YRJUBwcHX47Yrh2VwxpO0l97B2N/sNi658m65HnGyz2/hAjF3fzc1w==
   dependencies:
     "@cfworker/json-schema" "^4.0.2"
     ansi-styles "^5.0.0"
@@ -126,23 +126,23 @@
   dependencies:
     uuid "^10.0.0"
 
-"@langchain/langgraph-sdk@~1.6.0":
-  version "1.6.2"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.6.2.tgz#3b5d0707ddb844fd288cfacb81bb1b726ea7ee5f"
-  integrity sha512-UzRZsnDqdTmeitf/K5yZnVdl+V+7bDj/hQUXm+Y8TwWUuKtWUDocIReKgAmPQLoIz0AN8bOUt0QGnIISmCZyuA==
+"@langchain/langgraph-sdk@~2.0.0":
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-2.0.0.tgz#55ac46373aa4917443d92c8b2edd5efd162bc879"
+  integrity sha512-Xdkl1hve84ZGQ7fgpiBIBvjODhtjbPPccY4snOtYgSdzRXZkESsi2Y7RDKgFe1nC9+DbX+QaYom0raD/XFBKAw==
   dependencies:
     "@types/json-schema" "^7.0.15"
     p-queue "^9.0.1"
     p-retry "^7.1.1"
     uuid "^13.0.0"
 
-"@langchain/langgraph@^1.1.4":
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.1.4.tgz#9eb2ca3bf03329a16d0bd8ae734fdd139d5862f8"
-  integrity sha512-9OhRF+7Zvcpure8TLtBrxfJDo0PAoHZhfzcPL6M3CsGXiYqLWm5tQe+FYqn9zRIV7IwphqVEl1QDNbOkVgo+kw==
+"@langchain/langgraph@^1.1.5":
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.1.5.tgz#7cab6c585b5e60ac52e70ef941ba6054f45b0d88"
+  integrity sha512-uJC/asydf/GoHpo9x42lf9hs8ufCkMuJ9sDle5ybP7sMD0XryOfE0E4J3deARk9ZadCCt6zeCoCNu/mTbx8+Sg==
   dependencies:
     "@langchain/langgraph-checkpoint" "^1.0.0"
-    "@langchain/langgraph-sdk" "~1.6.0"
+    "@langchain/langgraph-sdk" "~2.0.0"
     "@standard-schema/spec" "1.1.0"
     uuid "^10.0.0"
 
@@ -297,6 +297,11 @@ acorn@^8.15.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.15.0.tgz#a360898bc415edaac46c8241f6383975b930b816"
   integrity sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==
 
+acorn@^8.16.0:
+  version "8.16.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.16.0.tgz#4ce79c89be40afe7afe8f3adb902a1f1ce9ac08a"
+  integrity sha512-UVJyE9MttOsBQIDKw1skb9nAwQuR5wuGD3+82K6JgJlm/Y+KI92oNsMNGZCYdDsVtRHSak0pcV5Dno5+4jh9sw==
+
 ajv@^6.12.4:
   version "6.12.6"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.6.tgz#baf5a62e802b07d977034586f8c3baf5adf26df4"
@@ -429,7 +434,7 @@ brace-expansion@^1.1.7:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
-brace-expansion@^2.0.1:
+brace-expansion@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-2.0.2.tgz#54fc53237a613d854c7bd37463aad17df87214e7"
   integrity sha512-Jt0vHyM+jmUBqojB7E1NIYadt0vI0Qxjxd2TErW94wDz+E2LAm5vKMXXwg6ZZBTHPuUlDgQHKXvjGBdfcF1ZDQ==
@@ -772,10 +777,10 @@ eslint-plugin-prettier@^5.5.5:
     prettier-linter-helpers "^1.0.1"
     synckit "^0.11.12"
 
-eslint-scope@^9.1.0:
-  version "9.1.0"
-  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-9.1.0.tgz#dfcb41d6c0d73df6b977a50cf3e91c41ddb4154e"
-  integrity sha512-CkWE42hOJsNj9FJRaoMX9waUFYhqY4jmyLFdAdzZr6VaCg3ynLYx4WnOdkaIifGfH4gsUcBTn4OZbHXkpLD0FQ==
+eslint-scope@^9.1.1:
+  version "9.1.1"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-9.1.1.tgz#f6a209486e38bd28356b5feb07d445cc99c89967"
+  integrity sha512-GaUN0sWim5qc8KVErfPBWmc31LEsOkrUJbvJZV+xuL3u2phMUK4HIvXlWAakfC8W4nzlK+chPEAkYOYb5ZScIw==
   dependencies:
     "@types/esrecurse" "^4.3.1"
     "@types/estree" "^1.0.8"
@@ -792,19 +797,19 @@ eslint-visitor-keys@^4.2.1:
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-4.2.1.tgz#4cfea60fe7dd0ad8e816e1ed026c1d5251b512c1"
   integrity sha512-Uhdk5sfqcee/9H/rCOJikYz67o0a2Tw2hGRPOG2Y1R2dg7brRe1uG0yaNQDHu+TO/uQPF/5eCapvYSmHUjt7JQ==
 
-eslint-visitor-keys@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-5.0.0.tgz#b9aa1a74aa48c44b3ae46c1597ce7171246a94a9"
-  integrity sha512-A0XeIi7CXU7nPlfHS9loMYEKxUaONu/hTEzHTGba9Huu94Cq1hPivf+DE5erJozZOky0LfvXAyrV/tcswpLI0Q==
+eslint-visitor-keys@^5.0.0, eslint-visitor-keys@^5.0.1:
+  version "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@^10.0.0:
-  version "10.0.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.0.0.tgz#c93c36a96d91621d0fbb680db848ea11af56ab1e"
-  integrity sha512-O0piBKY36YSJhlFSG8p9VUdPV/SxxS4FYDWVpr/9GJuMaepzwlf4J8I4ov1b+ySQfDTPhc3DtLaxcT1fN0yqCg==
+eslint@^10.0.1:
+  version "10.0.1"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.0.1.tgz#b5c5f7706782a21590ba6451e7a30d2947273c2d"
+  integrity sha512-20MV9SUdeN6Jd84xESsKhRly+/vxI+hwvpBMA93s+9dAcjdCuCojn4IqUGS3lvVaqjVYGYHSRMCpeFtF2rQYxQ==
   dependencies:
     "@eslint-community/eslint-utils" "^4.8.0"
     "@eslint-community/regexpp" "^4.12.2"
-    "@eslint/config-array" "^0.23.0"
+    "@eslint/config-array" "^0.23.2"
     "@eslint/config-helpers" "^0.5.2"
     "@eslint/core" "^1.1.0"
     "@eslint/plugin-kit" "^0.6.0"
@@ -816,9 +821,9 @@ eslint@^10.0.0:
     cross-spawn "^7.0.6"
     debug "^4.3.2"
     escape-string-regexp "^4.0.0"
-    eslint-scope "^9.1.0"
-    eslint-visitor-keys "^5.0.0"
-    espree "^11.1.0"
+    eslint-scope "^9.1.1"
+    eslint-visitor-keys "^5.0.1"
+    espree "^11.1.1"
     esquery "^1.7.0"
     esutils "^2.0.2"
     fast-deep-equal "^3.1.3"
@@ -829,7 +834,7 @@ eslint@^10.0.0:
     imurmurhash "^0.1.4"
     is-glob "^4.0.0"
     json-stable-stringify-without-jsonify "^1.0.1"
-    minimatch "^10.1.1"
+    minimatch "^10.2.1"
     natural-compare "^1.4.0"
     optionator "^0.9.3"
 
@@ -842,14 +847,14 @@ espree@^10.0.1:
     acorn-jsx "^5.3.2"
     eslint-visitor-keys "^4.2.1"
 
-espree@^11.1.0:
-  version "11.1.0"
-  resolved "https://registry.yarnpkg.com/espree/-/espree-11.1.0.tgz#7d0c82a69f8df670728dba256264b383fbf73e8f"
-  integrity sha512-WFWYhO1fV4iYkqOOvq8FbqIhr2pYfoDY0kCotMkDeNtGpiGGkZ1iov2u8ydjtgM8yF8rzK7oaTbw2NAzbAbehw==
+espree@^11.1.1:
+  version "11.1.1"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-11.1.1.tgz#866f6bc9ccccd6f28876b7a6463abb281b9cb847"
+  integrity sha512-AVHPqQoZYc+RUM4/3Ly5udlZY/U4LS8pIG05jEjWM2lQMU/oaZ7qshzAl2YP1tfNmXfftH3ohurfwNAug+MnsQ==
   dependencies:
-    acorn "^8.15.0"
+    acorn "^8.16.0"
     acorn-jsx "^5.3.2"
-    eslint-visitor-keys "^5.0.0"
+    eslint-visitor-keys "^5.0.1"
 
 esquery@^1.7.0:
   version "1.7.0"
@@ -1374,26 +1379,26 @@ math-intrinsics@^1.1.0:
   resolved "https://registry.yarnpkg.com/math-intrinsics/-/math-intrinsics-1.1.0.tgz#a0dd74be81e2aa5c2f27e65ce283605ee4e2b7f9"
   integrity sha512-/IXtbwEk5HTPyEwyKX6hGkYXxM9nbj64B+ilVJnC/R6B0pH5G4V3b0pVbL7DBj4tkhBAppbQUlf6F6Xl9LHu1g==
 
-minimatch@^10.1.1:
-  version "10.2.1"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-10.2.1.tgz#9d82835834cdc85d5084dd055e9a4685fa56e5f0"
-  integrity sha512-MClCe8IL5nRRmawL6ib/eT4oLyeKMGCghibcDWK+J0hh0Q8kqSdia6BvbRMVk6mPa6WqUa5uR2oxt6C5jd533A==
+minimatch@^10.2.1:
+  version "10.2.4"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-10.2.4.tgz#465b3accbd0218b8281f5301e27cedc697f96fde"
+  integrity sha512-oRjTw/97aTBN0RHbYCdtF1MQfvusSIBQM0IZEgzl6426+8jSC0nF1a/GmnVLpfB9yyr6g6FTqWqiZVbxrtaCIg==
   dependencies:
     brace-expansion "^5.0.2"
 
 minimatch@^3.1.2:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.1.2.tgz#19cd194bfd3e428f049a70817c038d89ab4be35b"
-  integrity sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==
+  version "3.1.5"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.1.5.tgz#580c88f8d5445f2bd6aa8f3cadefa0de79fbd69e"
+  integrity sha512-VgjWUsnnT6n+NUk6eZq77zeFdpW2LWDzP6zFGrCbHXiYNul5Dzqk2HHQ5uFH2DNW5Xbp8+jVzaeNt94ssEEl4w==
   dependencies:
     brace-expansion "^1.1.7"
 
 minimatch@^9.0.5:
-  version "9.0.5"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-9.0.5.tgz#d74f9dd6b57d83d8e98cfb82133b03978bc929e5"
-  integrity sha512-G6T0ZX48xgozx7587koeX9Ys2NYy6Gmv//P89sEte9V9whIapMNF4idKxnW2QtCcLiTWlb/wfCabAtAFWhhBow==
+  version "9.0.9"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-9.0.9.tgz#9b0cb9fcb78087f6fd7eababe2511c4d3d60574e"
+  integrity sha512-OBwBN9AL4dqmETlpS2zasx+vTeWclWzkblfZk7KTA5j3jeOONz/tRCnZomUyvNg83wL5Zv9Ss6HMJXAgL8R2Yg==
   dependencies:
-    brace-expansion "^2.0.1"
+    brace-expansion "^2.0.2"
 
 minimist@^1.2.0, minimist@^1.2.6:
   version "1.2.8"
@@ -1858,47 +1863,47 @@ tsconfig-paths@^3.15.0:
     minimist "^1.2.6"
     strip-bom "^3.0.0"
 
-turbo-darwin-64@2.8.9:
-  version "2.8.9"
-  resolved "https://registry.yarnpkg.com/turbo-darwin-64/-/turbo-darwin-64-2.8.9.tgz#c99b425437c8b3b49eb4ddf7ca44674dd6d4e940"
-  integrity sha512-KnCw1ZI9KTnEAhdI9avZrnZ/z4wsM++flMA1w8s8PKOqi5daGpFV36qoPafg4S8TmYMe52JPWEoFr0L+lQ5JIw==
+turbo-darwin-64@2.8.10:
+  version "2.8.10"
+  resolved "https://registry.yarnpkg.com/turbo-darwin-64/-/turbo-darwin-64-2.8.10.tgz#38ba73b9bbb3459cd27c6d3b5777bae80daa7e9f"
+  integrity sha512-A03fXh+B7S8mL3PbdhTd+0UsaGrhfyPkODvzBDpKRY7bbeac4MDFpJ7I+Slf2oSkCEeSvHKR7Z4U71uKRUfX7g==
 
-turbo-darwin-arm64@2.8.9:
-  version "2.8.9"
-  resolved "https://registry.yarnpkg.com/turbo-darwin-arm64/-/turbo-darwin-arm64-2.8.9.tgz#01a424a14956186bdd3a29a825f87c303ecbfda1"
-  integrity sha512-CbD5Y2NKJKBXTOZ7z7Cc7vGlFPZkYjApA7ri9lH4iFwKV1X7MoZswh9gyRLetXYWImVX1BqIvP8KftulJg/wIA==
+turbo-darwin-arm64@2.8.10:
+  version "2.8.10"
+  resolved "https://registry.yarnpkg.com/turbo-darwin-arm64/-/turbo-darwin-arm64-2.8.10.tgz#1c7a278a6361aef0a4e94849bf7181ff3c91d782"
+  integrity sha512-sidzowgWL3s5xCHLeqwC9M3s9M0i16W1nuQF3Mc7fPHpZ+YPohvcbVFBB2uoRRHYZg6yBnwD4gyUHKTeXfwtXA==
 
-turbo-linux-64@2.8.9:
-  version "2.8.9"
-  resolved "https://registry.yarnpkg.com/turbo-linux-64/-/turbo-linux-64-2.8.9.tgz#f8e7f4bf82a2f94a3d8bcd042642db4990cfd3bd"
-  integrity sha512-OXC9HdCtsHvyH+5KUoH8ds+p5WU13vdif0OPbsFzZca4cUXMwKA3HWwUuCgQetk0iAE4cscXpi/t8A263n3VTg==
+turbo-linux-64@2.8.10:
+  version "2.8.10"
+  resolved "https://registry.yarnpkg.com/turbo-linux-64/-/turbo-linux-64-2.8.10.tgz#aaa6ede45619daab2be359ec6afc3b0a73941272"
+  integrity sha512-YK9vcpL3TVtqonB021XwgaQhY9hJJbKKUhLv16osxV0HkcQASQWUqR56yMge7puh6nxU67rQlTq1b7ksR1T3KA==
 
-turbo-linux-arm64@2.8.9:
-  version "2.8.9"
-  resolved "https://registry.yarnpkg.com/turbo-linux-arm64/-/turbo-linux-arm64-2.8.9.tgz#7e7cd446c518dd4e19aa87f71c3234124449681d"
-  integrity sha512-yI5n8jNXiFA6+CxnXG0gO7h5ZF1+19K8uO3/kXPQmyl37AdiA7ehKJQOvf9OPAnmkGDHcF2HSCPltabERNRmug==
+turbo-linux-arm64@2.8.10:
+  version "2.8.10"
+  resolved "https://registry.yarnpkg.com/turbo-linux-arm64/-/turbo-linux-arm64-2.8.10.tgz#a9a52e4eca69968d85f09adb24ba3aec24a50023"
+  integrity sha512-3+j2tL0sG95iBJTm+6J8/45JsETQABPqtFyYjVjBbi6eVGdtNTiBmHNKrbvXRlQ3ZbUG75bKLaSSDHSEEN+btQ==
 
-turbo-windows-64@2.8.9:
-  version "2.8.9"
-  resolved "https://registry.yarnpkg.com/turbo-windows-64/-/turbo-windows-64-2.8.9.tgz#71da356ba3a9585ddbf3eb6f85a92239454aa9bd"
-  integrity sha512-/OztzeGftJAg258M/9vK2ZCkUKUzqrWXJIikiD2pm8TlqHcIYUmepDbyZSDfOiUjMy6NzrLFahpNLnY7b5vNgg==
+turbo-windows-64@2.8.10:
+  version "2.8.10"
+  resolved "https://registry.yarnpkg.com/turbo-windows-64/-/turbo-windows-64-2.8.10.tgz#b0f64a29451477c1ecdc7dbe0555b8e75c464044"
+  integrity sha512-hdeF5qmVY/NFgiucf8FW0CWJWtyT2QPm5mIsX0W1DXAVzqKVXGq+Zf+dg4EUngAFKjDzoBeN6ec2Fhajwfztkw==
 
-turbo-windows-arm64@2.8.9:
-  version "2.8.9"
-  resolved "https://registry.yarnpkg.com/turbo-windows-arm64/-/turbo-windows-arm64-2.8.9.tgz#b1c223c1f2c900292246074c3c2ebc9c7db57684"
-  integrity sha512-xZ2VTwVTjIqpFZKN4UBxDHCPM3oJ2J5cpRzCBSmRpJ/Pn33wpiYjs+9FB2E03svKaD04/lSSLlEUej0UYsugfg==
+turbo-windows-arm64@2.8.10:
+  version "2.8.10"
+  resolved "https://registry.yarnpkg.com/turbo-windows-arm64/-/turbo-windows-arm64-2.8.10.tgz#8d178389a995f98142b7ce8f76e1fce8a4b7c79d"
+  integrity sha512-QGdr/Q8LWmj+ITMkSvfiz2glf0d7JG0oXVzGL3jxkGqiBI1zXFj20oqVY0qWi+112LO9SVrYdpHS0E/oGFrMbQ==
 
-turbo@^2.8.9:
-  version "2.8.9"
-  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.8.9.tgz#15d8468f9f1725381a9bab58ccdb12c5614de5bc"
-  integrity sha512-G+Mq8VVQAlpz/0HTsxiNNk/xywaHGl+dk1oiBREgOEVCCDjXInDlONWUn5srRnC9s5tdHTFD1bx1N19eR4hI+g==
+turbo@^2.8.10:
+  version "2.8.10"
+  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.8.10.tgz#4ead3ef7c2fd80f9fe367f9a8b88b8a819fb5065"
+  integrity sha512-OxbzDES66+x7nnKGg2MwBA1ypVsZoDTLHpeaP4giyiHSixbsiTaMyeJqbEyvBdp5Cm28fc+8GG6RdQtic0ijwQ==
   optionalDependencies:
-    turbo-darwin-64 "2.8.9"
-    turbo-darwin-arm64 "2.8.9"
-    turbo-linux-64 "2.8.9"
-    turbo-linux-arm64 "2.8.9"
-    turbo-windows-64 "2.8.9"
-    turbo-windows-arm64 "2.8.9"
+    turbo-darwin-64 "2.8.10"
+    turbo-darwin-arm64 "2.8.10"
+    turbo-linux-64 "2.8.10"
+    turbo-linux-arm64 "2.8.10"
+    turbo-windows-64 "2.8.10"
+    turbo-windows-arm64 "2.8.10"
 
 type-check@^0.4.0, type-check@~0.4.0:
   version "0.4.0"

libs/cli/langgraph_cli/__init__.py

@@ -1 +1 @@
-__version__ = "0.4.13"
+__version__ = "0.4.14"

libs/cli/langgraph_cli/cli.py

@@ -765,6 +765,8 @@ def dev(
         allow_blocking=allow_blocking,
         tunnel=tunnel,
         server_level=server_log_level,
+        checkpointer=config_json.get("checkpointer"),
+        disable_persistence=config_json.get("disable_persistence", False),
     )
 
 

libs/cli/langgraph_cli/config.py

@@ -678,6 +678,51 @@ def _update_encryption_path(
     )
 
 
+def _update_checkpointer_path(
+    config_path: pathlib.Path, config: Config, local_deps: LocalDeps
+) -> None:
+    """Update checkpointer.path to use Docker container paths."""
+    checkpointer_conf = config.get("checkpointer")
+    if not checkpointer_conf or not isinstance(checkpointer_conf, dict):
+        return
+    if not (path_str := checkpointer_conf.get("path")):
+        return
+
+    module_str, sep, attr_str = path_str.partition(":")
+    if not sep or not module_str.startswith("."):
+        return  # Already validated or absolute path
+
+    resolved = config_path.parent / module_str
+    if not resolved.exists():
+        raise FileNotFoundError(
+            f"Checkpointer file not found: {resolved} (from {path_str})"
+        )
+    if not resolved.is_file():
+        raise IsADirectoryError(f"Checkpointer path must be a file: {resolved}")
+
+    # Check faux packages first (higher priority)
+    for faux_path, (_, destpath) in local_deps.faux_pkgs.items():
+        if resolved.is_relative_to(faux_path):
+            new_path = f"{destpath}/{resolved.relative_to(faux_path)}:{attr_str}"
+            checkpointer_conf["path"] = new_path
+            return
+
+    # Check real packages
+    for real_path in local_deps.real_pkgs:
+        if resolved.is_relative_to(real_path):
+            new_path = (
+                f"/deps/{real_path.name}/{resolved.relative_to(real_path)}:{attr_str}"
+            )
+            checkpointer_conf["path"] = new_path
+            return
+
+    raise ValueError(
+        f"Checkpointer file '{resolved}' not covered by dependencies.\n"
+        "Add its parent directory to the 'dependencies' array in your config.\n"
+        f"Current dependencies: {config['dependencies']}"
+    )
+
+
 def _update_http_app_path(
     config_path: pathlib.Path, config: Config, local_deps: LocalDeps
 ) -> None:
@@ -877,6 +922,8 @@ def python_config_to_docker(
     _update_auth_path(config_path, config, local_deps)
     # Rewrite encryption path, so it points to the correct location in the Docker container
     _update_encryption_path(config_path, config, local_deps)
+    # Rewrite checkpointer path, so it points to the correct location in the Docker container
+    _update_checkpointer_path(config_path, config, local_deps)
     # Rewrite HTTP app path, so it points to the correct location in the Docker container
     _update_http_app_path(config_path, config, local_deps)
 

libs/cli/langgraph_cli/schemas.py

@@ -128,7 +128,7 @@ class SerdeConfig(TypedDict, total=False):
     If omitted, no serde is set up (the object store will still be present, however)."""
 
     allowed_json_modules: list[list[str]] | bool | None
-    """Optional. List of allowed python modules to de-serialize custom objects from.
+    """Optional. List of allowed python modules to de-serialize custom objects from JSON.
     
     If provided, only the specified modules will be allowed to be deserialized.
     If omitted, no modules are allowed, and the object returned will simply be a json object OR
@@ -148,7 +148,34 @@ class SerdeConfig(TypedDict, total=False):
     Example:
     {...
         "serde": {
-            "allowed_json_modules": true
+            "allowed_json_modules": True
+        }
+    }
+
+    """
+    allowed_msgpack_modules: list[list[str]] | bool | None
+    """Optional. List of allowed python modules to de-serialize custom objects from msgpack.
+
+    Known safe types (langgraph.checkpoint.serde.jsonplus.SAFE_MSGPACK_TYPES) are always
+    allowed regardless of this setting. Use this to allowlist your custom Pydantic models,
+    dataclasses, and other user-defined types.
+
+    If True (default), unregistered types will log a warning but still be deserialized.
+    If None, only known safe types will be deserialized; unregistered types will be blocked.
+
+    Example - allowlist specific types (no warnings for these):
+    {...
+        "serde": {
+            "allowed_msgpack_modules": [
+                ["my_agent.models", "MyState"],
+            ]
+        }
+    }
+
+    Example - strict mode (only safe types allowed):
+    {...
+        "serde": {
+            "allowed_msgpack_modules": null
         }
     }
     
@@ -167,6 +194,26 @@ class CheckpointerConfig(TypedDict, total=False):
     If omitted, no checkpointer is set up (the object store will still be present, however).
     """
 
+    path: str
+    """Import path to an async context manager that yields a `BaseCheckpointSaver`
+    instance.
+
+    The referenced object should be an `@asynccontextmanager`-decorated function
+    so that the server can properly manage the checkpointer's lifecycle (e.g.
+    opening and closing connections).
+
+    Examples:
+    - "./my_checkpointer.py:create_checkpointer"
+    - "my_package.checkpointer:create_checkpointer"
+
+    When provided, this replaces the default checkpointer.
+
+    You can use the `langgraph-checkpoint-conformance` package
+    (https://pypi.org/project/langgraph-checkpoint-conformance/) to run simple
+    conformance tests against your custom checkpointer and catch
+    incompatibilities early.
+    """
+
     ttl: ThreadTTLConfig | None
     """Optional. Defines the TTL (time-to-live) behavior configuration.
     
@@ -308,8 +355,7 @@ class EncryptionConfig(TypedDict, total=False):
     """Configuration for custom at-rest encryption logic.
 
     Allows you to implement custom encryption for sensitive data stored in the database,
-    including metadata fields and checkpoint blobs.
-    """
+    including metadata fields and checkpoint blobs."""
 
     path: str
     """Required. Path to an instance of the Encryption() class that implements custom encryption handlers.
@@ -509,6 +555,21 @@ class WebhookUrlPolicy(TypedDict, total=False):
     """Disallow relative URLs (internal loopback calls) when true."""
 
 
+class GraphDef(TypedDict, total=False):
+    """Definition of a graph with additional metadata."""
+
+    path: str
+    """Required. Import path to the graph object.
+
+    Format: "path/to/file.py:object_name"
+    """
+    description: str | None
+    """Optional. A description of the graph's purpose and functionality.
+
+    This description is surfaced in the API and can help users understand what the graph does.
+    """
+
+
 class WebhooksConfig(TypedDict, total=False):
     env_prefix: str
     """Required prefix for environment variables referenced in header templates.
@@ -599,19 +660,23 @@ class Config(TypedDict, total=False):
     Defaults to an empty list, meaning no additional packages installed beyond your base environment.
     """
 
-    graphs: dict[str, str]
+    graphs: dict[str, str | GraphDef]
     """Optional. Named definitions of graphs, each pointing to a Python object.
 
-    
+
     Graphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context
     managers that accept a single configuration argument (of type RunnableConfig) and return a pregel object
     (instance of Stategraph, etc.).
-    
-    Keys are graph names, values are "path/to/file.py:object_name".
+
+    Keys are graph names, values are either "path/to/file.py:object_name" strings
+    or objects with a "path" key and optional "description" key.
     Example:
         {
             "mygraph": "graphs/my_graph.py:graph_definition",
-            "anothergraph": "graphs/another.py:get_graph"
+            "anothergraph": {
+                "path": "graphs/another.py:get_graph",
+                "description": "A graph that does X"
+            }
         }
     """
 
@@ -676,6 +741,7 @@ class Config(TypedDict, total=False):
 
 __all__ = [
     "Config",
+    "GraphDef",
     "StoreConfig",
     "CheckpointerConfig",
     "AuthConfig",

libs/cli/schemas/schema.json

@@ -127,9 +127,16 @@
             "graphs": {
               "type": "object",
               "additionalProperties": {
-                "type": "string"
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "$ref": "#/$defs/GraphDef"
+                  }
+                ]
               },
-              "description": "Optional. Named definitions of graphs, each pointing to a Python object.\n\n\nGraphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context\nmanagers that accept a single configuration argument (of type RunnableConfig) and return a pregel object\n(instance of Stategraph, etc.).\n"
+              "description": "Optional. Named definitions of graphs, each pointing to a Python object.\n\n\nGraphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context\nmanagers that accept a single configuration argument (of type RunnableConfig) and return a pregel object\n(instance of Stategraph, etc.).\n\nor objects with a \"path\" key and optional \"description\" key."
             },
             "http": {
               "anyOf": [
@@ -341,9 +348,16 @@
             "graphs": {
               "type": "object",
               "additionalProperties": {
-                "type": "string"
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "$ref": "#/$defs/GraphDef"
+                  }
+                ]
               },
-              "description": "Optional. Named definitions of graphs, each pointing to a Python object.\n\n\nGraphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context\nmanagers that accept a single configuration argument (of type RunnableConfig) and return a pregel object\n(instance of Stategraph, etc.).\n"
+              "description": "Optional. Named definitions of graphs, each pointing to a Python object.\n\n\nGraphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context\nmanagers that accept a single configuration argument (of type RunnableConfig) and return a pregel object\n(instance of Stategraph, etc.).\n\nor objects with a \"path\" key and optional \"description\" key."
             },
             "http": {
               "anyOf": [
@@ -542,6 +556,10 @@
       "description": "Configuration for the built-in checkpointer, which handles checkpointing of state.\n\nIf omitted, no checkpointer is set up (the object store will still be present, however).",
       "type": "object",
       "properties": {
+        "path": {
+          "type": "string",
+          "description": "Import path to an async context manager that yields a `BaseCheckpointSaver`\ninstance.\n\nThe referenced object should be an `@asynccontextmanager`-decorated function\nso that the server can properly manage the checkpointer's lifecycle (e.g.\nopening and closing connections).\n"
+        },
         "serde": {
           "anyOf": [
             {
@@ -590,7 +608,27 @@
               "type": "null"
             }
           ],
-          "description": "Optional. List of allowed python modules to de-serialize custom objects from.\n\nIf provided, only the specified modules will be allowed to be deserialized.\nIf omitted, no modules are allowed, and the object returned will simply be a json object OR\na deserialized langchain object.\n"
+          "description": "Optional. List of allowed python modules to de-serialize custom objects from JSON.\n\nIf provided, only the specified modules will be allowed to be deserialized.\nIf omitted, no modules are allowed, and the object returned will simply be a json object OR\na deserialized langchain object.\n"
+        },
+        "allowed_msgpack_modules": {
+          "anyOf": [
+            {
+              "type": "array",
+              "items": {
+                "type": "array",
+                "items": {
+                  "type": "string"
+                }
+              }
+            },
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Optional. List of allowed python modules to de-serialize custom objects from msgpack.\n\nKnown safe types (langgraph.checkpoint.serde.jsonplus.SAFE_MSGPACK_TYPES) are always\nallowed regardless of this setting. Use this to allowlist your custom Pydantic models,\ndataclasses, and other user-defined types.\n\nIf True (default), unregistered types will log a warning but still be deserialized.\nIf None, only known safe types will be deserialized; unregistered types will be blocked.\n\n{...\n[\"my_agent.models\", \"MyState\"],\n]\n}\n}\n\n{...\n}\n}\n\n"
         },
         "pickle_fallback": {
           "type": "boolean",
@@ -658,6 +696,29 @@
       },
       "required": []
     },
+    "GraphDef": {
+      "title": "GraphDef",
+      "description": "Definition of a graph with additional metadata.",
+      "type": "object",
+      "properties": {
+        "description": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Optional. A description of the graph's purpose and functionality.\n\nThis description is surfaced in the API and can help users understand what the graph does.\n"
+        },
+        "path": {
+          "type": "string",
+          "description": "Required. Import path to the graph object.\n"
+        }
+      },
+      "required": []
+    },
     "HttpConfig": {
       "title": "HttpConfig",
       "description": "Configuration for the built-in HTTP server that powers your deployment's routes and endpoints.",

libs/cli/schemas/schema.v0.json

@@ -127,9 +127,16 @@
             "graphs": {
               "type": "object",
               "additionalProperties": {
-                "type": "string"
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "$ref": "#/$defs/GraphDef"
+                  }
+                ]
               },
-              "description": "Optional. Named definitions of graphs, each pointing to a Python object.\n\n\nGraphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context\nmanagers that accept a single configuration argument (of type RunnableConfig) and return a pregel object\n(instance of Stategraph, etc.).\n"
+              "description": "Optional. Named definitions of graphs, each pointing to a Python object.\n\n\nGraphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context\nmanagers that accept a single configuration argument (of type RunnableConfig) and return a pregel object\n(instance of Stategraph, etc.).\n\nor objects with a \"path\" key and optional \"description\" key."
             },
             "http": {
               "anyOf": [
@@ -341,9 +348,16 @@
             "graphs": {
               "type": "object",
               "additionalProperties": {
-                "type": "string"
+                "anyOf": [
+                  {
+                    "type": "string"
+                  },
+                  {
+                    "$ref": "#/$defs/GraphDef"
+                  }
+                ]
               },
-              "description": "Optional. Named definitions of graphs, each pointing to a Python object.\n\n\nGraphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context\nmanagers that accept a single configuration argument (of type RunnableConfig) and return a pregel object\n(instance of Stategraph, etc.).\n"
+              "description": "Optional. Named definitions of graphs, each pointing to a Python object.\n\n\nGraphs can be StateGraph, @entrypoint, or any other Pregel object OR they can point to (async) context\nmanagers that accept a single configuration argument (of type RunnableConfig) and return a pregel object\n(instance of Stategraph, etc.).\n\nor objects with a \"path\" key and optional \"description\" key."
             },
             "http": {
               "anyOf": [
@@ -542,6 +556,10 @@
       "description": "Configuration for the built-in checkpointer, which handles checkpointing of state.\n\nIf omitted, no checkpointer is set up (the object store will still be present, however).",
       "type": "object",
       "properties": {
+        "path": {
+          "type": "string",
+          "description": "Import path to an async context manager that yields a `BaseCheckpointSaver`\ninstance.\n\nThe referenced object should be an `@asynccontextmanager`-decorated function\nso that the server can properly manage the checkpointer's lifecycle (e.g.\nopening and closing connections).\n"
+        },
         "serde": {
           "anyOf": [
             {
@@ -590,7 +608,27 @@
               "type": "null"
             }
           ],
-          "description": "Optional. List of allowed python modules to de-serialize custom objects from.\n\nIf provided, only the specified modules will be allowed to be deserialized.\nIf omitted, no modules are allowed, and the object returned will simply be a json object OR\na deserialized langchain object.\n"
+          "description": "Optional. List of allowed python modules to de-serialize custom objects from JSON.\n\nIf provided, only the specified modules will be allowed to be deserialized.\nIf omitted, no modules are allowed, and the object returned will simply be a json object OR\na deserialized langchain object.\n"
+        },
+        "allowed_msgpack_modules": {
+          "anyOf": [
+            {
+              "type": "array",
+              "items": {
+                "type": "array",
+                "items": {
+                  "type": "string"
+                }
+              }
+            },
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Optional. List of allowed python modules to de-serialize custom objects from msgpack.\n\nKnown safe types (langgraph.checkpoint.serde.jsonplus.SAFE_MSGPACK_TYPES) are always\nallowed regardless of this setting. Use this to allowlist your custom Pydantic models,\ndataclasses, and other user-defined types.\n\nIf True (default), unregistered types will log a warning but still be deserialized.\nIf None, only known safe types will be deserialized; unregistered types will be blocked.\n\n{...\n[\"my_agent.models\", \"MyState\"],\n]\n}\n}\n\n{...\n}\n}\n\n"
         },
         "pickle_fallback": {
           "type": "boolean",
@@ -658,6 +696,29 @@
       },
       "required": []
     },
+    "GraphDef": {
+      "title": "GraphDef",
+      "description": "Definition of a graph with additional metadata.",
+      "type": "object",
+      "properties": {
+        "description": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "description": "Optional. A description of the graph's purpose and functionality.\n\nThis description is surfaced in the API and can help users understand what the graph does.\n"
+        },
+        "path": {
+          "type": "string",
+          "description": "Required. Import path to the graph object.\n"
+        }
+      },
+      "required": []
+    },
     "HttpConfig": {
       "title": "HttpConfig",
       "description": "Configuration for the built-in HTTP server that powers your deployment's routes and endpoints.",

libs/langgraph/Makefile

@@ -1,4 +1,4 @@
-.PHONY: all format lint test test_watch integration_tests spell_check spell_fix benchmark profile start-dev-server integration_tests
+.PHONY: all format lint type test test_watch integration_tests spell_check spell_fix benchmark profile start-dev-server integration_tests
 
 # Default target executed when no arguments are given to make.
 all: help
@@ -87,15 +87,15 @@ integration_tests:
 
 WORKERS ?= auto
 XDIST_ARGS := $(if $(WORKERS),-n $(WORKERS) --dist worksteal,)
-MAXFAIL ?=
-MAXFAIL_ARGS := $(if $(MAXFAIL),--maxfail $(MAXFAIL),)
+MAXFAIL ?= 1
+MAXFAIL_ARGS = $(if $(MAXFAIL),--maxfail $(MAXFAIL),)
 # Add an '-x' if xdist is enabled
 XDIST_ARGS := $(if $(WORKERS),-x $(XDIST_ARGS),)
 
 test_watch:
 	make start-services &&\
 	make start-dev-server &&\
-	uv run ptw . -- --ff -vv $(XDIST_ARGS) $(MAXFAIL_ARGS) $(TEST); \
+	uv run ptw -- --ff -vv $(XDIST_ARGS) $(MAXFAIL_ARGS) $(TEST); \
 	EXIT_CODE=$$?; \
 	make stop-services; \
 	make stop-dev-server; \
@@ -125,9 +125,12 @@ lint lint_diff lint_package lint_tests:
 	[ "$(PYTHON_FILES)" = "" ] || mkdir -p $(MYPY_CACHE)
 	[ "$(PYTHON_FILES)" = "" ] || uv run mypy langgraph --cache-dir $(MYPY_CACHE)
 
+type:
+	mkdir -p $(MYPY_CACHE) && uv run mypy langgraph --cache-dir $(MYPY_CACHE)
+
 format format_diff:
 	uv run ruff format $(PYTHON_FILES)
-	uv run ruff check --select I --fix $(PYTHON_FILES)
+	uv run ruff check --fix $(PYTHON_FILES)
 
 spell_check:
 	uv run codespell --toml pyproject.toml
@@ -147,6 +150,7 @@ help:
 	@echo '-- LINTING --'
 	@echo 'format                       - run code formatters'
 	@echo 'lint                         - run linters'
+	@echo 'type                         - run type checking'
 	@echo 'spell_check               	- run codespell on the project'
 	@echo 'spell_fix               		- run codespell on the project and fix the errors'
 	@echo '-- TESTS --'

libs/langgraph/bench/__main__.py

@@ -10,6 +10,7 @@ from bench.fanout_to_subgraph import fanout_to_subgraph, fanout_to_subgraph_sync
 from bench.pydantic_state import pydantic_state
 from bench.react_agent import react_agent
 from bench.sequential import create_sequential
+from bench.serde_allowlist import collect_allowlist_large, collect_allowlist_small
 from bench.wide_dict import wide_dict
 from bench.wide_state import wide_state
 from langgraph.graph import StateGraph
@@ -513,3 +514,7 @@ compilation_benchmarks = (
 
 for name, graph in compilation_benchmarks:
     r.bench_func(name + "_compilation", compile_graph, graph)
+
+# Serde allowlist collection
+r.bench_func("serde_allowlist_small", collect_allowlist_small)
+r.bench_func("serde_allowlist_large", collect_allowlist_large)

libs/langgraph/bench/serde_allowlist.py

@@ -0,0 +1,81 @@
+from __future__ import annotations
+
+from collections import deque
+from dataclasses import dataclass
+from enum import Enum
+from typing import Annotated
+
+from pydantic import BaseModel
+from typing_extensions import NotRequired, TypedDict
+
+from langgraph._internal._serde import collect_allowlist_from_schemas
+
+
+class Color(Enum):
+    RED = "red"
+    BLUE = "blue"
+
+
+@dataclass
+class InnerDataclass:
+    value: int
+
+
+class InnerModel(BaseModel):
+    name: str
+
+
+class InnerTyped(TypedDict):
+    payload: InnerDataclass
+    optional: NotRequired[InnerModel]
+
+
+@dataclass
+class Node:
+    value: int
+    child: Node | None = None
+
+
+@dataclass
+class NestedDataclass:
+    inner: InnerDataclass
+    items: list[InnerModel]
+    mapping: dict[str, InnerDataclass]
+    optional: InnerModel | None
+    union: InnerDataclass | InnerModel
+    queue: deque[InnerDataclass]
+    frozen: frozenset[InnerModel]
+
+
+AnnotatedList = Annotated[list[InnerDataclass], "meta"]
+
+
+class DummyChannel:
+    @property
+    def ValueType(self) -> type[InnerDataclass]:
+        return InnerDataclass
+
+    @property
+    def UpdateType(self) -> type[InnerModel]:
+        return InnerModel
+
+
+SCHEMAS_SMALL = [InnerDataclass, InnerModel, Color]
+SCHEMAS_LARGE = [
+    InnerDataclass,
+    InnerModel,
+    Color,
+    InnerTyped,
+    Node,
+    NestedDataclass,
+    AnnotatedList,
+]
+CHANNELS = {"a": DummyChannel(), "b": DummyChannel()}
+
+
+def collect_allowlist_small() -> None:
+    collect_allowlist_from_schemas(schemas=SCHEMAS_SMALL, channels=CHANNELS)
+
+
+def collect_allowlist_large() -> None:
+    collect_allowlist_from_schemas(schemas=SCHEMAS_LARGE, channels=CHANNELS)

libs/langgraph/langgraph/_internal/_constants.py

@@ -41,6 +41,8 @@ CONFIG_KEY_CACHE = sys.intern("__pregel_cache")
 # holds a `BaseCache` made available to subgraphs
 CONFIG_KEY_RESUMING = sys.intern("__pregel_resuming")
 # holds a boolean indicating if subgraphs should resume from a previous checkpoint
+CONFIG_KEY_REPLAYING = sys.intern("__pregel_replaying")
+# holds a boolean indicating if subgraphs should replay (re-run tasks, drop cached RESUME writes)
 CONFIG_KEY_TASK_ID = sys.intern("__pregel_task_id")
 # holds the task ID for the current task
 CONFIG_KEY_THREAD_ID = sys.intern("thread_id")
@@ -98,6 +100,7 @@ RESERVED = {
     CONFIG_KEY_STREAM,
     CONFIG_KEY_CHECKPOINT_MAP,
     CONFIG_KEY_RESUMING,
+    CONFIG_KEY_REPLAYING,
     CONFIG_KEY_TASK_ID,
     CONFIG_KEY_CHECKPOINT_MAP,
     CONFIG_KEY_CHECKPOINT_ID,

libs/langgraph/langgraph/_internal/_serde.py

@@ -0,0 +1,253 @@
+from __future__ import annotations
+
+import dataclasses
+import logging
+import sys
+import types
+from collections import deque
+from enum import Enum
+from typing import (
+    Annotated,
+    Any,
+    Literal,
+    Union,
+    get_args,
+    get_origin,
+    get_type_hints,
+)
+
+from langchain_core import messages as lc_messages
+from langgraph.checkpoint.base import BaseCheckpointSaver
+from pydantic import BaseModel
+from typing_extensions import NotRequired, Required, is_typeddict
+
+try:
+    from langgraph.checkpoint.serde._msgpack import (  # noqa: F401
+        STRICT_MSGPACK_ENABLED,
+    )
+except ImportError:
+    STRICT_MSGPACK_ENABLED = False
+
+_warned_allowlist_unsupported = False
+
+logger = logging.getLogger(__name__)
+
+
+def _supports_checkpointer_allowlist() -> bool:
+    return hasattr(BaseCheckpointSaver, "with_allowlist")
+
+
+_SUPPORTS_ALLOWLIST = _supports_checkpointer_allowlist()
+
+
+def apply_checkpointer_allowlist(
+    checkpointer: Any, allowlist: set[tuple[str, ...]] | None
+) -> Any:
+    if not checkpointer or allowlist is None or checkpointer in (True, False):
+        return checkpointer
+    if not _SUPPORTS_ALLOWLIST:
+        global _warned_allowlist_unsupported
+        if not _warned_allowlist_unsupported:
+            logger.warning(
+                "Checkpointer does not support with_allowlist; strict msgpack "
+                "allowlist will be skipped."
+            )
+            _warned_allowlist_unsupported = True
+        return checkpointer
+    return checkpointer.with_allowlist(allowlist)
+
+
+def curated_core_allowlist() -> set[tuple[str, ...]]:
+    allowlist: set[tuple[str, ...]] = set()
+    for name in (
+        "BaseMessage",
+        "BaseMessageChunk",
+        "HumanMessage",
+        "HumanMessageChunk",
+        "AIMessage",
+        "AIMessageChunk",
+        "SystemMessage",
+        "SystemMessageChunk",
+        "ChatMessage",
+        "ChatMessageChunk",
+        "ToolMessage",
+        "ToolMessageChunk",
+        "FunctionMessage",
+        "FunctionMessageChunk",
+        "RemoveMessage",
+    ):
+        cls = getattr(lc_messages, name, None)
+        if cls is None:
+            continue
+        allowlist.add((cls.__module__, cls.__name__))
+
+    return allowlist
+
+
+def build_serde_allowlist(
+    *,
+    schemas: list[type[Any]] | None = None,
+    channels: dict[str, Any] | None = None,
+) -> set[tuple[str, ...]]:
+    allowlist = curated_core_allowlist()
+    if schemas:
+        schemas = [schema for schema in schemas if schema is not None]
+    return allowlist | collect_allowlist_from_schemas(
+        schemas=schemas,
+        channels=channels,
+    )
+
+
+def collect_allowlist_from_schemas(
+    *,
+    schemas: list[type[Any]] | None = None,
+    channels: dict[str, Any] | None = None,
+) -> set[tuple[str, ...]]:
+    allowlist: set[tuple[str, ...]] = set()
+    seen: set[Any] = set()
+    seen_ids: set[int] = set()
+
+    if schemas:
+        for schema in schemas:
+            _collect_from_type(schema, allowlist, seen, seen_ids)
+
+    if channels:
+        for channel in channels.values():
+            value_type = getattr(channel, "ValueType", None)
+            if value_type is not None:
+                _collect_from_type(value_type, allowlist, seen, seen_ids)
+            update_type = getattr(channel, "UpdateType", None)
+            if update_type is not None:
+                _collect_from_type(update_type, allowlist, seen, seen_ids)
+
+    return allowlist
+
+
+def _collect_from_type(
+    typ: Any,
+    allowlist: set[tuple[str, ...]],
+    seen: set[Any],
+    seen_ids: set[int],
+) -> None:
+    if _already_seen(typ, seen, seen_ids):
+        return
+
+    if typ is Any or typ is None:
+        return
+
+    if typ is Literal:
+        return
+
+    if isinstance(typ, types.UnionType):
+        for arg in typ.__args__:
+            _collect_from_type(arg, allowlist, seen, seen_ids)
+        return
+
+    origin = get_origin(typ)
+    if origin is Union:
+        for arg in get_args(typ):
+            _collect_from_type(arg, allowlist, seen, seen_ids)
+        return
+    if origin is Annotated or origin in (Required, NotRequired):
+        args = get_args(typ)
+        if args:
+            _collect_from_type(args[0], allowlist, seen, seen_ids)
+        return
+
+    if origin is Literal:
+        return
+
+    if origin in (list, set, tuple, dict, deque, frozenset):
+        for arg in get_args(typ):
+            _collect_from_type(arg, allowlist, seen, seen_ids)
+        return
+
+    if hasattr(typ, "__supertype__"):
+        _collect_from_type(typ.__supertype__, allowlist, seen, seen_ids)
+        return
+
+    if is_typeddict(typ):
+        for field_type in _safe_get_type_hints(typ).values():
+            _collect_from_type(field_type, allowlist, seen, seen_ids)
+        return
+
+    if _is_pydantic_model(typ):
+        allowlist.add((typ.__module__, typ.__name__))
+        field_types = _safe_get_type_hints(typ)
+        if field_types:
+            for field_type in field_types.values():
+                _collect_from_type(field_type, allowlist, seen, seen_ids)
+        else:
+            for field_type in _pydantic_field_types(typ):
+                _collect_from_type(field_type, allowlist, seen, seen_ids)
+        return
+
+    if dataclasses.is_dataclass(typ):
+        if typ_name := getattr(typ, "__name__", None):
+            allowlist.add((typ.__module__, typ_name))
+        field_types = _safe_get_type_hints(typ)
+        if field_types:
+            for field_type in field_types.values():
+                _collect_from_type(field_type, allowlist, seen, seen_ids)
+        else:
+            for field in dataclasses.fields(typ):
+                _collect_from_type(field.type, allowlist, seen, seen_ids)
+        return
+
+    if isinstance(typ, type) and issubclass(typ, Enum):
+        allowlist.add((typ.__module__, typ.__name__))
+        return
+
+
+def _already_seen(typ: Any, seen: set[Any], seen_ids: set[int]) -> bool:
+    try:
+        if typ in seen:
+            return True
+        seen.add(typ)
+        return False
+    except TypeError:
+        typ_id = id(typ)
+        if typ_id in seen_ids:
+            return True
+        seen_ids.add(typ_id)
+        return False
+
+
+def _safe_get_type_hints(typ: Any) -> dict[str, Any]:
+    try:
+        module = sys.modules.get(getattr(typ, "__module__", ""))
+        globalns = module.__dict__ if module else None
+        localns = dict(vars(typ)) if hasattr(typ, "__dict__") else None
+        return get_type_hints(
+            typ, globalns=globalns, localns=localns, include_extras=True
+        )
+    except Exception:
+        return {}
+
+
+def _is_pydantic_model(typ: Any) -> bool:
+    if not isinstance(typ, type):
+        return False
+    if issubclass(typ, BaseModel):
+        return True
+    try:
+        from pydantic.v1 import BaseModel as BaseModelV1
+    except Exception:
+        return False
+    return issubclass(typ, BaseModelV1)
+
+
+def _pydantic_field_types(typ: type[Any]) -> list[Any]:
+    if hasattr(typ, "model_fields"):
+        return [
+            field.annotation
+            for field in typ.model_fields.values()
+            if getattr(field, "annotation", None) is not None
+        ]
+    if hasattr(typ, "__fields__"):
+        return [
+            field.outer_type_
+            for field in typ.__fields__.values()
+            if getattr(field, "outer_type_", None) is not None
+        ]
+    return []

libs/langgraph/langgraph/func/__init__.py

@@ -20,6 +20,7 @@ from langgraph.checkpoint.base import BaseCheckpointSaver
 from langgraph.store.base import BaseStore
 from typing_extensions import Unpack
 
+from langgraph._internal import _serde
 from langgraph._internal._constants import CACHE_NS_WRITES, PREVIOUS
 from langgraph._internal._typing import MISSING, DeprecatedKwargs
 from langgraph.channels.ephemeral_value import EphemeralValue
@@ -528,7 +529,7 @@ class entrypoint(Generic[ContextT]):
                 else:
                     output_type = save_type = sig.return_annotation
 
-        return Pregel(
+        graph: Pregel[Any, ContextT, Any, Any] = Pregel(
             nodes={
                 func.__name__: PregelNode(
                     bound=bound,
@@ -559,5 +560,16 @@ class entrypoint(Generic[ContextT]):
             cache=self.cache,
             cache_policy=self.cache_policy,
             retry_policy=self.retry_policy or (),
-            context_schema=self.context_schema,  # type: ignore[arg-type]
+            context_schema=self.context_schema,
         )
+        if _serde.STRICT_MSGPACK_ENABLED:
+            serde_allowlist = _serde.build_serde_allowlist(
+                schemas=[input_type, output_type, save_type]
+                + ([self.context_schema] if self.context_schema is not None else []),
+                channels=graph.channels,
+            )
+            graph._serde_allowlist = serde_allowlist
+            graph.checkpointer = _serde.apply_checkpointer_allowlist(
+                graph.checkpointer, serde_allowlist
+            )
+        return graph

libs/langgraph/langgraph/graph/state.py

@@ -29,6 +29,7 @@ from langgraph.store.base import BaseStore
 from pydantic import BaseModel, TypeAdapter
 from typing_extensions import NotRequired, Required, Self, Unpack, is_typeddict
 
+from langgraph._internal import _serde
 from langgraph._internal._constants import (
     INTERRUPT,
     NS_END,
@@ -1079,6 +1080,28 @@ class StateGraph(Generic[StateT, ContextT, InputT, OutputT]):
             CompiledStateGraph: The compiled `StateGraph`.
         """
         checkpointer = ensure_valid_checkpointer(checkpointer)
+        serde_allowlist: set[tuple[str, ...]] | None = None
+        if _serde.STRICT_MSGPACK_ENABLED:
+            schema_types: list[type[Any]] = [
+                self.state_schema,
+                self.input_schema,
+                self.output_schema,
+            ]
+            if self.context_schema is not None:
+                schema_types.append(self.context_schema)
+            for node in self.nodes.values():
+                schema_types.append(node.input_schema)
+            for branches in self.branches.values():
+                for branch in branches.values():
+                    if branch.input_schema is not None:
+                        schema_types.append(branch.input_schema)
+            serde_allowlist = _serde.build_serde_allowlist(
+                schemas=schema_types,
+                channels=self.channels,
+            )
+            checkpointer = _serde.apply_checkpointer_allowlist(
+                checkpointer, serde_allowlist
+            )
 
         # assign default values
         interrupt_before = interrupt_before or []
@@ -1135,6 +1158,7 @@ class StateGraph(Generic[StateT, ContextT, InputT, OutputT]):
             cache=cache,
             name=name or "LangGraph",
         )
+        compiled._serde_allowlist = serde_allowlist
 
         compiled.attach_node(START, None)
         for key, node in self.nodes.items():

libs/langgraph/langgraph/pregel/_loop.py

@@ -42,6 +42,7 @@ from langgraph._internal._constants import (
     CONFIG_KEY_CHECKPOINT_ID,
     CONFIG_KEY_CHECKPOINT_MAP,
     CONFIG_KEY_CHECKPOINT_NS,
+    CONFIG_KEY_REPLAYING,
     CONFIG_KEY_RESUME_MAP,
     CONFIG_KEY_RESUMING,
     CONFIG_KEY_SCRATCHPAD,
@@ -152,7 +153,7 @@ class PregelLoop:
     input_keys: str | Sequence[str]
     output_keys: str | Sequence[str]
     stream_keys: str | Sequence[str]
-    skip_done_tasks: bool
+    is_replaying: bool
     is_nested: bool
     manager: None | AsyncParentRunManager | ParentRunManager
     interrupt_after: All | Sequence[str]
@@ -244,7 +245,9 @@ class PregelLoop:
         self.interrupt_before = interrupt_before
         self.manager = manager
         self.is_nested = CONFIG_KEY_TASK_ID in self.config.get(CONF, {})
-        self.skip_done_tasks = CONFIG_KEY_CHECKPOINT_ID not in config[CONF]
+        self.is_replaying = CONFIG_KEY_CHECKPOINT_ID in config[
+            CONF
+        ] or config[CONF].get(CONFIG_KEY_REPLAYING, False)
         self._migrate_checkpoint = migrate_checkpoint
         self.trigger_to_nodes = trigger_to_nodes
         self.retry_policy = retry_policy
@@ -451,7 +454,7 @@ class PregelLoop:
             # save the new task
             self.tasks[pushed.id] = pushed
             # match any pending writes to the new task
-            if self.skip_done_tasks:
+            if not self.is_replaying:
                 self._match_writes({pushed.id: pushed})
             # return the new task, to be started if not run before
             return pushed
@@ -515,7 +518,7 @@ class PregelLoop:
             return False
 
         # if there are pending writes from a previous loop, apply them
-        if self.skip_done_tasks and self.checkpoint_pending_writes:
+        if not self.is_replaying and self.checkpoint_pending_writes:
             self._match_writes(self.tasks)
 
         # before execution, check if we should interrupt
@@ -557,8 +560,8 @@ class PregelLoop:
             )
         # clear pending writes
         self.checkpoint_pending_writes.clear()
-        # "not skip_done_tasks" only applies to first tick after resuming
-        self.skip_done_tasks = True
+        # only replay (re-execute) done tasks on the first tick
+        self.is_replaying = False
         # save checkpoint
         self._put_checkpoint({"source": "loop"})
         # after execution, check if we should interrupt
@@ -567,8 +570,9 @@ class PregelLoop:
         ):
             self.status = "interrupt_after"
             raise GraphInterrupt()
-        # unset resuming flag
+        # unset resuming/replaying flags
         self.config[CONF].pop(CONFIG_KEY_RESUMING, None)
+        self.config[CONF].pop(CONFIG_KEY_REPLAYING, None)
 
     def match_cached_writes(self) -> Sequence[PregelExecutableTask]:
         raise NotImplementedError
@@ -618,22 +622,28 @@ class PregelLoop:
     def _first(
         self, *, input_keys: str | Sequence[str], updated_channels: set[str] | None
     ) -> set[str] | None:
-        # resuming from previous checkpoint requires
-        # - finding a previous checkpoint
-        # - receiving None input (outer graph) or RESUMING flag (subgraph)
+        # 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)
         configurable = self.config.get(CONF, {})
-        is_resuming = bool(self.checkpoint["channel_versions"]) and bool(
-            configurable.get(
-                CONFIG_KEY_RESUMING,
-                self.input is None
-                or isinstance(self.input, Command)
-                or (
-                    not self.is_nested
-                    and self.config.get("metadata", {}).get("run_id")
-                    == self.checkpoint_metadata.get("run_id", MISSING)
-                ),
+        has_prior_checkpoint = bool(self.checkpoint["channel_versions"])
+        # For subgraphs, the parent explicitly sets CONFIG_KEY_RESUMING.
+        # For the outer graph, we infer from the input:
+        #   - None input: resume after interrupt (invoke(None, config))
+        #   - Command input: any Command operates on existing state
+        #   - Same run_id: re-entry into an ongoing run (e.g. stream reconnect)
+        input_signals_resume = (
+            self.input is None
+            or isinstance(self.input, Command)
+            or (
+                not self.is_nested
+                and self.config.get("metadata", {}).get("run_id")
+                == self.checkpoint_metadata.get("run_id", MISSING)
             )
         )
+        is_resuming = has_prior_checkpoint and bool(
+            configurable.get(CONFIG_KEY_RESUMING, input_signals_resume)
+        )
 
         # map command to writes
         if isinstance(self.input, Command):
@@ -723,10 +733,14 @@ class PregelLoop:
             self._put_checkpoint({"source": "input"})
         elif CONFIG_KEY_RESUMING not in configurable:
             raise EmptyInputError(f"Received no input for {input_keys}")
-        # update config
+        # Propagate resuming and replaying flags to subgraphs.
         if not self.is_nested:
             self.config = patch_configurable(
-                self.config, {CONFIG_KEY_RESUMING: is_resuming}
+                self.config,
+                {
+                    CONFIG_KEY_RESUMING: is_resuming,
+                    CONFIG_KEY_REPLAYING: self.is_replaying,
+                },
             )
         # set flag
         self.status = "pending"
@@ -1085,6 +1099,14 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
             saved = self.checkpointer.get_tuple(self.checkpoint_config)
         else:
             saved = None
+        # When replaying a subgraph that wasn't in the checkpoint map
+        # (parent checkpoint predates this subgraph), start fresh.
+        if (
+            saved is not None
+            and self.config[CONF].get(CONFIG_KEY_REPLAYING)
+            and not self.checkpoint_config.get(CONF, {}).get(CONFIG_KEY_CHECKPOINT_ID)
+        ):
+            saved = None
         if saved is None:
             saved = CheckpointTuple(
                 self.checkpoint_config, empty_checkpoint(), {"step": -2}, None, []
@@ -1109,6 +1131,19 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
             if saved.pending_writes is not None
             else []
         )
+        # When replaying from a specific checkpoint, drop cached RESUME
+        # writes so that interrupt() calls re-fire instead of returning
+        # stale values. But if a resume value is being provided (e.g.
+        # Command(resume=...) on a specific checkpoint), keep them —
+        # multi-interrupt scenarios need previously resolved values preserved.
+        if self.is_replaying:
+            has_resume_value = (
+                isinstance(self.input, Command) and self.input.resume is not None
+            ) or self.config.get(CONF, {}).get(CONFIG_KEY_RESUMING, False)
+            if not has_resume_value:
+                self.checkpoint_pending_writes = [
+                    w for w in self.checkpoint_pending_writes if w[1] != RESUME
+                ]
 
         self.submit = self.stack.enter_context(BackgroundExecutor(self.config))
         self.channels, self.managed = channels_from_checkpoint(
@@ -1264,6 +1299,14 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
             saved = await self.checkpointer.aget_tuple(self.checkpoint_config)
         else:
             saved = None
+        # When replaying a subgraph that wasn't in the checkpoint map
+        # (parent checkpoint predates this subgraph), start fresh.
+        if (
+            saved is not None
+            and self.config[CONF].get(CONFIG_KEY_REPLAYING)
+            and not self.checkpoint_config.get(CONF, {}).get(CONFIG_KEY_CHECKPOINT_ID)
+        ):
+            saved = None
         if saved is None:
             saved = CheckpointTuple(
                 self.checkpoint_config, empty_checkpoint(), {"step": -2}, None, []
@@ -1288,6 +1331,19 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
             if saved.pending_writes is not None
             else []
         )
+        # When replaying from a specific checkpoint, drop cached RESUME
+        # writes so that interrupt() calls re-fire instead of returning
+        # stale values. But if a resume value is being provided (e.g.
+        # Command(resume=...) on a specific checkpoint), keep them —
+        # multi-interrupt scenarios need previously resolved values preserved.
+        if self.is_replaying:
+            has_resume_value = (
+                isinstance(self.input, Command) and self.input.resume is not None
+            ) or self.config.get(CONF, {}).get(CONFIG_KEY_RESUMING, False)
+            if not has_resume_value:
+                self.checkpoint_pending_writes = [
+                    w for w in self.checkpoint_pending_writes if w[1] != RESUME
+                ]
 
         self.submit = await self.stack.enter_async_context(
             AsyncBackgroundExecutor(self.config)

libs/langgraph/langgraph/pregel/_retry.py

@@ -23,6 +23,35 @@ logger = logging.getLogger(__name__)
 SUPPORTS_EXC_NOTES = sys.version_info >= (3, 11)
 
 
+def _checkpoint_ns_for_parent_command(ns: str) -> str:
+    """Return the checkpoint namespace for the parent graph.
+
+    The checkpoint namespace is a `|`-separated path. Each segment is usually
+    of the form `name:task_id` (e.g. `parent_first:<uuid>|node:<uuid>`), but the
+    runtime may also insert a purely-numeric segment (e.g. `|1`) to disambiguate
+    concurrent tasks (e.g. `parent_first:<uuid>|1|node:<uuid>`).
+
+    Numeric segments are not real path levels, so we drop them before computing
+    the parent namespace.
+    """
+
+    parts = ns.split(NS_SEP)
+
+    # Drop any trailing numeric selectors for the current frame (e.g. `...|node:<id>|1`).
+    while parts and parts[-1].isdigit():
+        parts.pop()
+
+    # Drop the current frame segment itself (e.g. the `node:<id>`).
+    if parts:
+        parts.pop()
+
+    # Drop any trailing numeric selectors for the parent frame (e.g. `...|1|node:<id>`).
+    while parts and parts[-1].isdigit():
+        parts.pop()
+
+    return NS_SEP.join(parts)
+
+
 def run_with_retry(
     task: PregelExecutableTask,
     retry_policy: Sequence[RetryPolicy] | None,
@@ -50,12 +79,8 @@ def run_with_retry(
                     w.invoke(cmd, config)
                 break
             elif cmd.graph == Command.PARENT:
-                # this command is for the parent graph, assign it to the parent
-                parts = ns.split(NS_SEP)
-                if parts[-1].isdigit():
-                    parts.pop()
-                parent_ns = NS_SEP.join(parts[:-1])
-                exc.args = (replace(cmd, graph=parent_ns),)
+                # this command is for the parent graph, assign it to the parent.
+                exc.args = (replace(cmd, graph=_checkpoint_ns_for_parent_command(ns)),)
             # bubble up
             raise
         except GraphBubbleUp:
@@ -146,12 +171,8 @@ async def arun_with_retry(
                     w.invoke(cmd, config)
                 break
             elif cmd.graph == Command.PARENT:
-                # this command is for the parent graph, assign it to the parent
-                parts = ns.split(NS_SEP)
-                if parts[-1].isdigit():
-                    parts.pop()
-                parent_ns = NS_SEP.join(parts[:-1])
-                exc.args = (replace(cmd, graph=parent_ns),)
+                # this command is for the parent graph, assign it to the parent.
+                exc.args = (replace(cmd, graph=_checkpoint_ns_for_parent_command(ns)),)
             # bubble up
             raise
         except GraphBubbleUp:

libs/langgraph/langgraph/pregel/_runner.py

@@ -728,7 +728,6 @@ async def _acall_impl(
                     )
                 else:
                     fut.set_result(None)
-                futures()[fut] = next_task  # type: ignore[index]
             else:
                 # schedule the next task
                 fut = cast(

libs/langgraph/langgraph/pregel/main.py

@@ -48,6 +48,7 @@ from langgraph.store.base import BaseStore
 from pydantic import BaseModel, TypeAdapter
 from typing_extensions import Self, Unpack, deprecated, is_typeddict
 
+from langgraph._internal import _serde
 from langgraph._internal._config import (
     ensure_config,
     merge_configs,
@@ -698,9 +699,17 @@ class Pregel(
         self.config = config
         self.trigger_to_nodes = trigger_to_nodes or {}
         self.name = name
+        self._serde_allowlist: set[tuple[str, ...]] | None = None
         if auto_validate:
             self.validate()
 
+    def _apply_checkpointer_allowlist(
+        self, checkpointer: BaseCheckpointSaver | None
+    ) -> BaseCheckpointSaver | None:
+        if not _serde.STRICT_MSGPACK_ENABLED:
+            return checkpointer
+        return _serde.apply_checkpointer_allowlist(checkpointer, self._serde_allowlist)
+
     def get_graph(
         self, config: RunnableConfig | None = None, *, xray: int | bool = False
     ) -> Graph:
@@ -1239,6 +1248,8 @@ class Pregel(
         checkpointer: BaseCheckpointSaver | None = ensure_config(config)[CONF].get(
             CONFIG_KEY_CHECKPOINTER, self.checkpointer
         )
+        if isinstance(checkpointer, BaseCheckpointSaver):
+            checkpointer = self._apply_checkpointer_allowlist(checkpointer)
         if not checkpointer:
             raise ValueError("No checkpointer set")
 
@@ -1281,6 +1292,8 @@ class Pregel(
         checkpointer: BaseCheckpointSaver | None = ensure_config(config)[CONF].get(
             CONFIG_KEY_CHECKPOINTER, self.checkpointer
         )
+        if isinstance(checkpointer, BaseCheckpointSaver):
+            checkpointer = self._apply_checkpointer_allowlist(checkpointer)
         if not checkpointer:
             raise ValueError("No checkpointer set")
 
@@ -1329,6 +1342,8 @@ class Pregel(
         checkpointer: BaseCheckpointSaver | None = config[CONF].get(
             CONFIG_KEY_CHECKPOINTER, self.checkpointer
         )
+        if isinstance(checkpointer, BaseCheckpointSaver):
+            checkpointer = self._apply_checkpointer_allowlist(checkpointer)
         if not checkpointer:
             raise ValueError("No checkpointer set")
 
@@ -1380,6 +1395,8 @@ class Pregel(
         checkpointer: BaseCheckpointSaver | None = ensure_config(config)[CONF].get(
             CONFIG_KEY_CHECKPOINTER, self.checkpointer
         )
+        if isinstance(checkpointer, BaseCheckpointSaver):
+            checkpointer = self._apply_checkpointer_allowlist(checkpointer)
         if not checkpointer:
             raise ValueError("No checkpointer set")
 
@@ -1446,6 +1463,8 @@ class Pregel(
         checkpointer: BaseCheckpointSaver | None = ensure_config(config)[CONF].get(
             CONFIG_KEY_CHECKPOINTER, self.checkpointer
         )
+        if isinstance(checkpointer, BaseCheckpointSaver):
+            checkpointer = self._apply_checkpointer_allowlist(checkpointer)
         if not checkpointer:
             raise ValueError("No checkpointer set")
 
@@ -1890,6 +1909,8 @@ class Pregel(
         checkpointer: BaseCheckpointSaver | None = ensure_config(config)[CONF].get(
             CONFIG_KEY_CHECKPOINTER, self.checkpointer
         )
+        if isinstance(checkpointer, BaseCheckpointSaver):
+            checkpointer = self._apply_checkpointer_allowlist(checkpointer)
         if not checkpointer:
             raise ValueError("No checkpointer set")
 
@@ -2378,6 +2399,8 @@ class Pregel(
             raise RuntimeError("checkpointer=True cannot be used for root graphs.")
         else:
             checkpointer = self.checkpointer
+        if isinstance(checkpointer, BaseCheckpointSaver):
+            checkpointer = self._apply_checkpointer_allowlist(checkpointer)
         if checkpointer and not config.get(CONF):
             raise ValueError(
                 "Checkpointer requires one or more of the following 'configurable' "

libs/langgraph/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph"
-version = "1.0.8"
+version = "1.0.10"
 description = "Building stateful, multi-actor applications with LLMs"
 authors = []
 requires-python = ">=3.10"
@@ -27,7 +27,7 @@ dependencies = [
     "langchain-core>=0.1",
     "langgraph-checkpoint>=2.1.0,<5.0.0",
     "langgraph-sdk>=0.3.0,<0.4.0",
-    "langgraph-prebuilt>=1.0.7,<1.1.0",
+    "langgraph-prebuilt>=1.0.8,<1.1.0",
     "xxhash>=3.5.0",
     "pydantic>=2.7.4",
 ]

libs/langgraph/tests/conftest_checkpointer.py

@@ -1,3 +1,4 @@
+import os
 from contextlib import asynccontextmanager, contextmanager
 from uuid import uuid4
 
@@ -5,6 +6,7 @@ import pytest
 from langgraph.checkpoint.postgres import PostgresSaver
 from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
 from langgraph.checkpoint.serde.encrypted import EncryptedSerializer
+from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
 from langgraph.checkpoint.sqlite import SqliteSaver
 from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
 from psycopg import AsyncConnection, Connection
@@ -18,30 +20,60 @@ from tests.memory_assert import (  # noqa: E402
 )
 
 DEFAULT_POSTGRES_URI = "postgres://postgres:postgres@localhost:5442/"
+STRICT_MSGPACK = os.getenv("LANGGRAPH_STRICT_MSGPACK", "false").lower() in (
+    "1",
+    "true",
+    "yes",
+)
+
+
+def _strict_msgpack_serde() -> JsonPlusSerializer:
+    return JsonPlusSerializer(allowed_msgpack_modules=None)
+
+
+def _apply_strict_msgpack(checkpointer) -> None:
+    if not STRICT_MSGPACK:
+        return
+    serde = _strict_msgpack_serde()
+    if hasattr(checkpointer, "serde"):
+        checkpointer.serde = serde
+    if hasattr(checkpointer, "saver") and hasattr(checkpointer.saver, "serde"):
+        checkpointer.saver.serde = serde
 
 
 @contextmanager
 def _checkpointer_memory():
-    yield MemorySaverAssertImmutable()
+    if STRICT_MSGPACK:
+        yield MemorySaverAssertImmutable(serde=_strict_msgpack_serde())
+    else:
+        yield MemorySaverAssertImmutable()
 
 
 @contextmanager
 def _checkpointer_memory_migrate_sends():
-    yield MemorySaverNeedsPendingSendsMigration()
+    checkpointer = MemorySaverNeedsPendingSendsMigration()
+    _apply_strict_msgpack(checkpointer)
+    yield checkpointer
 
 
 @contextmanager
 def _checkpointer_sqlite():
     with SqliteSaver.from_conn_string(":memory:") as checkpointer:
+        _apply_strict_msgpack(checkpointer)
         yield checkpointer
 
 
 @contextmanager
 def _checkpointer_sqlite_aes():
     with SqliteSaver.from_conn_string(":memory:") as checkpointer:
-        checkpointer.serde = EncryptedSerializer.from_pycryptodome_aes(
-            key=b"1234567890123456"
-        )
+        if STRICT_MSGPACK:
+            checkpointer.serde = EncryptedSerializer.from_pycryptodome_aes(
+                serde=_strict_msgpack_serde(), key=b"1234567890123456"
+            )
+        else:
+            checkpointer.serde = EncryptedSerializer.from_pycryptodome_aes(
+                key=b"1234567890123456"
+            )
         yield checkpointer
 
 
@@ -57,6 +89,7 @@ def _checkpointer_postgres():
             DEFAULT_POSTGRES_URI + database
         ) as checkpointer:
             checkpointer.setup()
+            _apply_strict_msgpack(checkpointer)
             yield checkpointer
     finally:
         # drop unique db
@@ -79,6 +112,7 @@ def _checkpointer_postgres_pipe():
             # setup can't run inside pipeline because of implicit transaction
             with checkpointer.conn.pipeline() as pipe:
                 checkpointer.pipe = pipe
+                _apply_strict_msgpack(checkpointer)
                 yield checkpointer
     finally:
         # drop unique db
@@ -99,6 +133,7 @@ def _checkpointer_postgres_pool():
         ) as pool:
             checkpointer = PostgresSaver(pool)
             checkpointer.setup()
+            _apply_strict_msgpack(checkpointer)
             yield checkpointer
     finally:
         # drop unique db
@@ -109,6 +144,7 @@ def _checkpointer_postgres_pool():
 @asynccontextmanager
 async def _checkpointer_sqlite_aio():
     async with AsyncSqliteSaver.from_conn_string(":memory:") as checkpointer:
+        _apply_strict_msgpack(checkpointer)
         yield checkpointer
 
 
@@ -126,6 +162,7 @@ async def _checkpointer_postgres_aio():
             DEFAULT_POSTGRES_URI + database
         ) as checkpointer:
             await checkpointer.setup()
+            _apply_strict_msgpack(checkpointer)
             yield checkpointer
     finally:
         # drop unique db
@@ -152,6 +189,7 @@ async def _checkpointer_postgres_aio_pipe():
             # setup can't run inside pipeline because of implicit transaction
             async with checkpointer.conn.pipeline() as pipe:
                 checkpointer.pipe = pipe
+                _apply_strict_msgpack(checkpointer)
                 yield checkpointer
     finally:
         # drop unique db
@@ -176,6 +214,7 @@ async def _checkpointer_postgres_aio_pool():
         ) as pool:
             checkpointer = AsyncPostgresSaver(pool)
             await checkpointer.setup()
+            _apply_strict_msgpack(checkpointer)
             yield checkpointer
     finally:
         # drop unique db

libs/langgraph/tests/test_parent_command.py

@@ -0,0 +1,53 @@
+from __future__ import annotations
+
+from typing_extensions import TypedDict
+
+from langgraph.graph import END, START, StateGraph
+from langgraph.types import Command
+
+
+def test_parent_command_from_nested_subgraph() -> None:
+    class ParentState(TypedDict):
+        jump_from_idx: int
+
+    class ChildState(TypedDict):
+        jump: bool
+
+    child_builder: StateGraph[ChildState] = StateGraph(ChildState)
+
+    def child_node(state: ChildState) -> Command | ChildState:
+        if state["jump"]:
+            return Command(graph=Command.PARENT, goto="parent_second")
+        return state
+
+    child_builder.add_node("node", child_node)
+    child_builder.add_edge(START, "node")
+
+    child_0 = child_builder.compile()
+    child_1 = child_builder.compile()
+
+    parent_builder: StateGraph[ParentState] = StateGraph(ParentState)
+
+    def parent_first(state: ParentState) -> ParentState:
+        child_0.invoke({"jump": state["jump_from_idx"] == 1})
+        if state["jump_from_idx"] == 1:
+            raise AssertionError("Shouldn't be here")
+
+        child_1.invoke({"jump": state["jump_from_idx"] == 2})
+        if state["jump_from_idx"] == 2:
+            raise AssertionError("Shouldn't be here")
+
+        return state
+
+    def parent_second(state: ParentState) -> ParentState:
+        return state
+
+    parent_builder.add_node("parent_first", parent_first)
+    parent_builder.add_node("parent_second", parent_second)
+    parent_builder.add_edge(START, "parent_first")
+    parent_builder.add_edge("parent_second", END)
+
+    graph = parent_builder.compile()
+
+    assert graph.invoke({"jump_from_idx": 1}) == {"jump_from_idx": 1}
+    assert graph.invoke({"jump_from_idx": 2}) == {"jump_from_idx": 2}

libs/langgraph/tests/test_parent_command_async.py

@@ -0,0 +1,57 @@
+from __future__ import annotations
+
+import pytest
+from langchain_core.runnables import RunnableConfig
+from typing_extensions import TypedDict
+
+from langgraph.graph import END, START, StateGraph
+from langgraph.types import Command
+
+pytestmark = pytest.mark.anyio
+
+
+async def test_parent_command_from_nested_subgraph() -> None:
+    class ParentState(TypedDict):
+        jump_from_idx: int
+
+    class ChildState(TypedDict):
+        jump: bool
+
+    child_builder: StateGraph[ChildState] = StateGraph(ChildState)
+
+    async def child_node(state: ChildState) -> Command | ChildState:
+        if state["jump"]:
+            return Command(graph=Command.PARENT, goto="parent_second")
+        return state
+
+    child_builder.add_node("node", child_node)
+    child_builder.add_edge(START, "node")
+
+    child_0 = child_builder.compile()
+    child_1 = child_builder.compile()
+
+    parent_builder: StateGraph[ParentState] = StateGraph(ParentState)
+
+    async def parent_first(state: ParentState, config: RunnableConfig) -> ParentState:
+        await child_0.ainvoke({"jump": state["jump_from_idx"] == 1}, config)
+        if state["jump_from_idx"] == 1:
+            raise AssertionError("Shouldn't be here")
+
+        await child_1.ainvoke({"jump": state["jump_from_idx"] == 2}, config)
+        if state["jump_from_idx"] == 2:
+            raise AssertionError("Shouldn't be here")
+
+        return state
+
+    async def parent_second(state: ParentState) -> ParentState:
+        return state
+
+    parent_builder.add_node("parent_first", parent_first)
+    parent_builder.add_node("parent_second", parent_second)
+    parent_builder.add_edge(START, "parent_first")
+    parent_builder.add_edge("parent_second", END)
+
+    graph = parent_builder.compile().with_config(recursion_limit=10)
+
+    assert await graph.ainvoke({"jump_from_idx": 1}) == {"jump_from_idx": 1}
+    assert await graph.ainvoke({"jump_from_idx": 2}) == {"jump_from_idx": 2}

libs/langgraph/tests/test_pregel.py

@@ -5800,6 +5800,284 @@ def test_multiple_interrupts_functional_cache(
     assert counter == 6
 
 
+def test_task_before_interrupt_resume(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that Command(resume=value) works correctly when a @task runs
+    before interrupt-producing tasks in an @entrypoint.
+
+    The @task wrapper on both setup and ask is essential to reproduce the bug:
+    - @task on setup triggers a mid-step put_writes (creating a new pending_writes list)
+    - @task on ask means interrupt() runs in a child scratchpad that must
+      delegate to the parent for null resume consumption tracking
+    """
+
+    @entrypoint(checkpointer=sync_checkpointer)
+    def workflow(number_of_topics: int) -> dict:
+        @task
+        def setup() -> int:
+            return number_of_topics
+
+        @task
+        def ask(question: str) -> str:
+            return interrupt(question)
+
+        n = setup().result()
+
+        answers = []
+        for i in range(n):
+            q = f"Whats the answer for topic {i + 1}?"
+            answers.append(ask(q).result())
+
+        return {"answers": answers}
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - should get first interrupt
+    result = workflow.invoke(2, config=config)
+    assert "__interrupt__" in result
+    assert len(result["__interrupt__"]) == 1
+    assert result["__interrupt__"][0].value == "Whats the answer for topic 1?"
+
+    # Resume with answer for topic 1 - should get second interrupt
+    result = workflow.invoke(Command(resume="answer1"), config=config)
+    assert "__interrupt__" in result, f"Expected interrupt for topic 2, got: {result}"
+    assert len(result["__interrupt__"]) == 1
+    assert result["__interrupt__"][0].value == "Whats the answer for topic 2?"
+
+    # Resume with answer for topic 2 - should get final result
+    result = workflow.invoke(Command(resume="answer2"), config=config)
+    assert result == {"answers": ["answer1", "answer2"]}
+
+
+def test_multiple_tasks_before_interrupt_resume(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that Command(resume=value) works correctly when multiple @tasks
+    run before an interrupt-producing task in an @entrypoint."""
+
+    @entrypoint(checkpointer=sync_checkpointer)
+    def workflow(inputs: dict) -> dict:
+        @task
+        def step_a(x: int) -> int:
+            return x + 1
+
+        @task
+        def step_b(x: int) -> int:
+            return x * 2
+
+        @task
+        def ask(question: str) -> str:
+            return interrupt(question)
+
+        a = step_a(inputs["x"]).result()
+        b = step_b(a).result()
+
+        answer = ask(f"Result so far is {b}. What next?").result()
+
+        return {"computed": b, "answer": answer}
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - should get interrupt
+    result = workflow.invoke({"x": 5}, config=config)
+    assert "__interrupt__" in result
+    assert result["__interrupt__"][0].value == "Result so far is 12. What next?"
+
+    # Resume
+    result = workflow.invoke(Command(resume="continue"), config=config)
+    assert result == {"computed": 12, "answer": "continue"}
+
+
+def test_no_redundant_put_writes_for_cached_task(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Cached @tasks on resume must not trigger redundant put_writes."""
+    from unittest.mock import patch
+
+    from langgraph.pregel._loop import PregelLoop
+
+    @task
+    def setup(x: int) -> int:
+        return x
+
+    @task
+    def ask(question: str) -> str:
+        return interrupt(question)
+
+    @entrypoint(checkpointer=sync_checkpointer)
+    def workflow(x: int) -> dict:
+        n = setup(x).result()
+        answer = ask(f"q{n}").result()
+        return {"answer": answer}
+
+    config = {"configurable": {"thread_id": "1"}}
+    result = workflow.invoke(1, config=config)
+    assert "__interrupt__" in result
+
+    put_writes_task_ids: list[str] = []
+    orig = PregelLoop.put_writes
+
+    def spy(self, task_id, writes):
+        put_writes_task_ids.append(task_id)
+        return orig(self, task_id, writes)
+
+    with patch.object(PregelLoop, "put_writes", spy):
+        result = workflow.invoke(Command(resume="ans"), config=config)
+
+    assert result == {"answer": "ans"}
+    # Count unique non-null task IDs that got put_writes.
+    # Should be exactly 2: the ask task and the entrypoint task.
+    # If 3, the cached setup task is being redundantly re-committed.
+    non_null = set(tid for tid in put_writes_task_ids if not tid.startswith("00000000"))
+    assert len(non_null) == 2, (
+        f"Expected 2 task IDs in put_writes (ask + entrypoint), got {len(non_null)}"
+    )
+
+
+def test_node_before_interrupt_resume_graph_api(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that Command(resume=value) works correctly in a StateGraph when a
+    node runs before a node that calls interrupt(). This is the graph-API
+    analog of test_task_before_interrupt_resume (entrypoint API)."""
+
+    class State(TypedDict):
+        topics: list[str]
+        answers: Annotated[list[str], operator.add]
+
+    def setup(state: State) -> dict:
+        return {"topics": [f"topic {i + 1}" for i in range(len(state["topics"]))]}
+
+    def ask(state: State) -> dict:
+        answers = []
+        for topic in state["topics"]:
+            answer = interrupt(f"Whats the answer for {topic}?")
+            answers.append(answer)
+        return {"answers": answers}
+
+    graph = (
+        StateGraph(State)
+        .add_node("setup", setup)
+        .add_node("ask", ask)
+        .add_edge(START, "setup")
+        .add_edge("setup", "ask")
+        .add_edge("ask", END)
+        .compile(checkpointer=sync_checkpointer)
+    )
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - setup runs, then ask interrupts on the first topic
+    result = graph.invoke({"topics": ["a", "b"], "answers": []}, config=config)
+    assert "__interrupt__" in result
+    assert len(result["__interrupt__"]) == 1
+    assert result["__interrupt__"][0].value == "Whats the answer for topic 1?"
+
+    # Resume with answer for topic 1 - should get second interrupt
+    result = graph.invoke(Command(resume="answer1"), config=config)
+    assert "__interrupt__" in result, f"Expected interrupt for topic 2, got: {result}"
+    assert len(result["__interrupt__"]) == 1
+    assert result["__interrupt__"][0].value == "Whats the answer for topic 2?"
+
+    # Resume with answer for topic 2 - should complete
+    result = graph.invoke(Command(resume="answer2"), config=config)
+    assert result == {
+        "topics": ["topic 1", "topic 2"],
+        "answers": ["answer1", "answer2"],
+    }
+
+
+def test_multiple_nodes_before_interrupt_resume_graph_api(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that Command(resume=value) works correctly in a StateGraph when
+    multiple nodes run before a node that calls interrupt(). This is the
+    graph-API analog of test_multiple_tasks_before_interrupt_resume."""
+
+    class State(TypedDict):
+        value: int
+        answer: str
+
+    def step_a(state: State) -> dict:
+        return {"value": state["value"] + 1}
+
+    def step_b(state: State) -> dict:
+        return {"value": state["value"] * 2}
+
+    def ask(state: State) -> dict:
+        answer = interrupt(f"Result so far is {state['value']}. What next?")
+        return {"answer": answer}
+
+    graph = (
+        StateGraph(State)
+        .add_node("step_a", step_a)
+        .add_node("step_b", step_b)
+        .add_node("ask", ask)
+        .add_edge(START, "step_a")
+        .add_edge("step_a", "step_b")
+        .add_edge("step_b", "ask")
+        .add_edge("ask", END)
+        .compile(checkpointer=sync_checkpointer)
+    )
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - step_a and step_b run, then ask interrupts
+    result = graph.invoke({"value": 5, "answer": ""}, config=config)
+    assert "__interrupt__" in result
+    assert result["__interrupt__"][0].value == "Result so far is 12. What next?"
+
+    # Resume - should complete
+    result = graph.invoke(Command(resume="continue"), config=config)
+    assert result == {"value": 12, "answer": "continue"}
+
+
+def test_node_before_multiple_interrupt_cycles_graph_api(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that a node running before an interrupt node does not interfere
+    with multiple interrupt/resume cycles in a StateGraph."""
+
+    class State(TypedDict):
+        count: int
+        data: str
+
+    def prepare(state: State) -> dict:
+        return {"count": state["count"] + 10}
+
+    def multi_interrupt(state: State) -> dict:
+        first = interrupt("First question?")
+        second = interrupt("Second question?")
+        return {"data": f"{first},{second}"}
+
+    graph = (
+        StateGraph(State)
+        .add_node("prepare", prepare)
+        .add_node("multi_interrupt", multi_interrupt)
+        .add_edge(START, "prepare")
+        .add_edge("prepare", "multi_interrupt")
+        .add_edge("multi_interrupt", END)
+        .compile(checkpointer=sync_checkpointer)
+    )
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - prepare runs, multi_interrupt hits first interrupt
+    result = graph.invoke({"count": 0, "data": ""}, config=config)
+    assert "__interrupt__" in result
+    assert result["__interrupt__"][0].value == "First question?"
+
+    # Resume first interrupt - hits second interrupt
+    result = graph.invoke(Command(resume="first_answer"), config=config)
+    assert "__interrupt__" in result
+    assert result["__interrupt__"][0].value == "Second question?"
+
+    # Resume second interrupt - completes
+    result = graph.invoke(Command(resume="second_answer"), config=config)
+    assert result == {"count": 10, "data": "first_answer,second_answer"}
+
+
 def test_double_interrupt_subgraph(sync_checkpointer: BaseCheckpointSaver) -> None:
     class AgentState(TypedDict):
         input: str

libs/langgraph/tests/test_pregel_async.py

@@ -7920,6 +7920,290 @@ async def test_interrupts_in_tasks_surfaced_once(
     assert result[1] == "Added Will!"
 
 
+@NEEDS_CONTEXTVARS
+async def test_task_before_interrupt_resume(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that Command(resume=value) works correctly when a @task runs
+    before interrupt-producing tasks in an @entrypoint.
+
+    The @task wrapper on both setup and ask is essential to reproduce the bug:
+    - @task on setup triggers a mid-step put_writes (creating a new pending_writes list)
+    - @task on ask means interrupt() runs in a child scratchpad that must
+      delegate to the parent for null resume consumption tracking
+    """
+
+    @entrypoint(checkpointer=async_checkpointer)
+    async def workflow(number_of_topics: int) -> dict:
+        @task
+        async def setup() -> int:
+            return number_of_topics
+
+        @task
+        async def ask(question: str) -> str:
+            return interrupt(question)
+
+        n = await setup()
+
+        answers = []
+        for i in range(n):
+            q = f"Whats the answer for topic {i + 1}?"
+            answers.append(await ask(q))
+
+        return {"answers": answers}
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - should get first interrupt
+    result = await workflow.ainvoke(2, config=config)
+    assert "__interrupt__" in result
+    assert len(result["__interrupt__"]) == 1
+    assert result["__interrupt__"][0].value == "Whats the answer for topic 1?"
+
+    # Resume with answer for topic 1 - should get second interrupt
+    result = await workflow.ainvoke(Command(resume="answer1"), config=config)
+    assert "__interrupt__" in result, f"Expected interrupt for topic 2, got: {result}"
+    assert len(result["__interrupt__"]) == 1
+    assert result["__interrupt__"][0].value == "Whats the answer for topic 2?"
+
+    # Resume with answer for topic 2 - should get final result
+    result = await workflow.ainvoke(Command(resume="answer2"), config=config)
+    assert result == {"answers": ["answer1", "answer2"]}
+
+
+@NEEDS_CONTEXTVARS
+async def test_multiple_tasks_before_interrupt_resume(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that Command(resume=value) works correctly when multiple @tasks
+    run before an interrupt-producing task in an @entrypoint."""
+
+    @entrypoint(checkpointer=async_checkpointer)
+    async def workflow(inputs: dict) -> dict:
+        @task
+        async def step_a(x: int) -> int:
+            return x + 1
+
+        @task
+        async def step_b(x: int) -> int:
+            return x * 2
+
+        @task
+        async def ask(question: str) -> str:
+            return interrupt(question)
+
+        a = await step_a(inputs["x"])
+        b = await step_b(a)
+
+        answer = await ask(f"Result so far is {b}. What next?")
+
+        return {"computed": b, "answer": answer}
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - should get interrupt
+    result = await workflow.ainvoke({"x": 5}, config=config)
+    assert "__interrupt__" in result
+    assert result["__interrupt__"][0].value == "Result so far is 12. What next?"
+
+    # Resume
+    result = await workflow.ainvoke(Command(resume="continue"), config=config)
+    assert result == {"computed": 12, "answer": "continue"}
+
+
+@NEEDS_CONTEXTVARS
+async def test_no_redundant_put_writes_for_cached_task(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Cached @tasks on resume must not trigger redundant put_writes."""
+    from unittest.mock import patch
+
+    from langgraph.pregel._loop import PregelLoop
+
+    @task
+    async def setup(x: int) -> int:
+        return x
+
+    @task
+    async def ask(question: str) -> str:
+        return interrupt(question)
+
+    @entrypoint(checkpointer=async_checkpointer)
+    async def workflow(x: int) -> dict:
+        n = await setup(x)
+        answer = await ask(f"q{n}")
+        return {"answer": answer}
+
+    config = {"configurable": {"thread_id": "1"}}
+    result = await workflow.ainvoke(1, config=config)
+    assert "__interrupt__" in result
+
+    put_writes_task_ids: list[str] = []
+    orig = PregelLoop.put_writes
+
+    def spy(self, task_id, writes):
+        put_writes_task_ids.append(task_id)
+        return orig(self, task_id, writes)
+
+    with patch.object(PregelLoop, "put_writes", spy):
+        result = await workflow.ainvoke(Command(resume="ans"), config=config)
+
+    assert result == {"answer": "ans"}
+    # Count unique non-null task IDs that got put_writes.
+    # Should be exactly 2: the ask task and the entrypoint task.
+    # If 3, the cached setup task is being redundantly re-committed.
+    non_null = set(tid for tid in put_writes_task_ids if not tid.startswith("00000000"))
+    assert len(non_null) == 2, (
+        f"Expected 2 task IDs in put_writes (ask + entrypoint), got {len(non_null)}"
+    )
+
+
+@NEEDS_CONTEXTVARS
+async def test_node_before_interrupt_resume_graph_api(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that Command(resume=value) works correctly in a StateGraph when a
+    node runs before a node that calls interrupt(). This is the graph-API
+    analog of test_task_before_interrupt_resume (entrypoint API)."""
+
+    class State(TypedDict):
+        topics: list[str]
+        answers: Annotated[list[str], operator.add]
+
+    def setup(state: State) -> dict:
+        return {"topics": [f"topic {i + 1}" for i in range(len(state["topics"]))]}
+
+    def ask(state: State) -> dict:
+        answers = []
+        for topic in state["topics"]:
+            answer = interrupt(f"Whats the answer for {topic}?")
+            answers.append(answer)
+        return {"answers": answers}
+
+    graph = (
+        StateGraph(State)
+        .add_node("setup", setup)
+        .add_node("ask", ask)
+        .add_edge(START, "setup")
+        .add_edge("setup", "ask")
+        .add_edge("ask", END)
+        .compile(checkpointer=async_checkpointer)
+    )
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - setup runs, then ask interrupts on the first topic
+    result = await graph.ainvoke({"topics": ["a", "b"], "answers": []}, config=config)
+    assert "__interrupt__" in result
+    assert len(result["__interrupt__"]) == 1
+    assert result["__interrupt__"][0].value == "Whats the answer for topic 1?"
+
+    # Resume with answer for topic 1 - should get second interrupt
+    result = await graph.ainvoke(Command(resume="answer1"), config=config)
+    assert "__interrupt__" in result, f"Expected interrupt for topic 2, got: {result}"
+    assert len(result["__interrupt__"]) == 1
+    assert result["__interrupt__"][0].value == "Whats the answer for topic 2?"
+
+    # Resume with answer for topic 2 - should complete
+    result = await graph.ainvoke(Command(resume="answer2"), config=config)
+    assert result == {
+        "topics": ["topic 1", "topic 2"],
+        "answers": ["answer1", "answer2"],
+    }
+
+
+@NEEDS_CONTEXTVARS
+async def test_multiple_nodes_before_interrupt_resume_graph_api(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that Command(resume=value) works correctly in a StateGraph when
+    multiple nodes run before a node that calls interrupt(). This is the
+    graph-API analog of test_multiple_tasks_before_interrupt_resume."""
+
+    class State(TypedDict):
+        value: int
+        answer: str
+
+    def step_a(state: State) -> dict:
+        return {"value": state["value"] + 1}
+
+    def step_b(state: State) -> dict:
+        return {"value": state["value"] * 2}
+
+    def ask(state: State) -> dict:
+        answer = interrupt(f"Result so far is {state['value']}. What next?")
+        return {"answer": answer}
+
+    graph = (
+        StateGraph(State)
+        .add_node("step_a", step_a)
+        .add_node("step_b", step_b)
+        .add_node("ask", ask)
+        .add_edge(START, "step_a")
+        .add_edge("step_a", "step_b")
+        .add_edge("step_b", "ask")
+        .add_edge("ask", END)
+        .compile(checkpointer=async_checkpointer)
+    )
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - step_a and step_b run, then ask interrupts
+    result = await graph.ainvoke({"value": 5, "answer": ""}, config=config)
+    assert "__interrupt__" in result
+    assert result["__interrupt__"][0].value == "Result so far is 12. What next?"
+
+    # Resume - should complete
+    result = await graph.ainvoke(Command(resume="continue"), config=config)
+    assert result == {"value": 12, "answer": "continue"}
+
+
+@NEEDS_CONTEXTVARS
+async def test_node_before_multiple_interrupt_cycles_graph_api(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Test that a node running before an interrupt node does not interfere
+    with multiple interrupt/resume cycles in a StateGraph."""
+
+    class State(TypedDict):
+        count: int
+        data: str
+
+    def prepare(state: State) -> dict:
+        return {"count": state["count"] + 10}
+
+    def multi_interrupt(state: State) -> dict:
+        first = interrupt("First question?")
+        second = interrupt("Second question?")
+        return {"data": f"{first},{second}"}
+
+    graph = (
+        StateGraph(State)
+        .add_node("prepare", prepare)
+        .add_node("multi_interrupt", multi_interrupt)
+        .add_edge(START, "prepare")
+        .add_edge("prepare", "multi_interrupt")
+        .add_edge("multi_interrupt", END)
+        .compile(checkpointer=async_checkpointer)
+    )
+
+    config = {"configurable": {"thread_id": "1"}}
+
+    # First invocation - prepare runs, multi_interrupt hits first interrupt
+    result = await graph.ainvoke({"count": 0, "data": ""}, config=config)
+    assert "__interrupt__" in result
+    assert result["__interrupt__"][0].value == "First question?"
+
+    # Resume first interrupt - hits second interrupt
+    result = await graph.ainvoke(Command(resume="first_answer"), config=config)
+    assert "__interrupt__" in result
+    assert result["__interrupt__"][0].value == "Second question?"
+
+    # Resume second interrupt - completes
+    result = await graph.ainvoke(Command(resume="second_answer"), config=config)
+    assert result == {"count": 10, "data": "first_answer,second_answer"}
+
+
 async def test_pregel_loop_refcount():
     gc.collect()
     try:

libs/langgraph/tests/test_pydantic.py

@@ -8,6 +8,7 @@ import uuid
 from enum import Enum
 from typing import Annotated, Literal, Optional
 
+from langgraph.checkpoint.base import BaseCheckpointSaver
 from pydantic import (
     BaseModel,
     ByteSize,
@@ -23,7 +24,10 @@ from pydantic import (
 
 from langgraph._internal._pydantic import is_supported_by_pydantic
 from langgraph.constants import END, START
+from langgraph.func import entrypoint, task
 from langgraph.graph.state import StateGraph
+from langgraph.types import Command, Interrupt, interrupt
+from tests.any_str import AnyStr
 
 
 def test_is_supported_by_pydantic() -> None:
@@ -312,3 +316,47 @@ def test_pydantic_state_field_validator():
     g = builder.compile()
     res = g.invoke(input_state)
     assert res["text"] == "Hello, Validated John!"
+
+
+class FunctionalState(BaseModel):
+    a: str
+    b: str | None = None
+
+
+def test_interrupt_functional_pydantic(sync_checkpointer: BaseCheckpointSaver) -> None:
+    called_count = 0
+
+    @task
+    def foo(state: FunctionalState) -> FunctionalState:
+        nonlocal called_count
+        called_count += 1
+        return FunctionalState(**{"a": state.a + "foo"})
+
+    @task
+    def bar(state: FunctionalState) -> dict:
+        return {"a": state.a + "bar", "b": state.b}
+
+    @entrypoint(checkpointer=sync_checkpointer)
+    def graph(inputs: FunctionalState) -> FunctionalState:
+        fut_foo = foo(inputs)
+        value = interrupt("Provide value for bar:")
+        foo_res = fut_foo.result()
+        assert isinstance(foo_res, FunctionalState)
+        bar_input = FunctionalState(a=foo_res.a, b=value)
+        fut_bar = bar(bar_input)
+        return fut_bar.result()
+
+    config = {"configurable": {"thread_id": "1"}}
+    # First run, interrupted at bar
+    assert graph.invoke(FunctionalState(a=""), config) == {
+        "__interrupt__": [
+            Interrupt(
+                value="Provide value for bar:",
+                id=AnyStr(),
+            )
+        ]
+    }
+    # Resume with an answer
+    res = graph.invoke(Command(resume="bar"), config)
+    assert res == {"a": "foobar", "b": "bar"}
+    assert called_count == 1

libs/langgraph/tests/test_retry.py

@@ -4,7 +4,7 @@ import pytest
 from typing_extensions import TypedDict
 
 from langgraph.graph import START, StateGraph
-from langgraph.pregel._retry import _should_retry_on
+from langgraph.pregel._retry import _checkpoint_ns_for_parent_command, _should_retry_on
 from langgraph.types import RetryPolicy
 
 
@@ -78,6 +78,22 @@ def test_should_retry_on_empty_sequence():
     assert _should_retry_on(policy, ValueError("test error")) is False
 
 
+def test_checkpoint_ns_for_parent_command() -> None:
+    assert _checkpoint_ns_for_parent_command("") == ""
+    assert _checkpoint_ns_for_parent_command("node:1") == ""
+    assert _checkpoint_ns_for_parent_command("node:1|child:2") == "node:1"
+    assert _checkpoint_ns_for_parent_command("node:1|1|child:2") == "node:1"
+    assert _checkpoint_ns_for_parent_command("node:1|1|child:2|1") == "node:1"
+    assert (
+        _checkpoint_ns_for_parent_command("parent:1|1|child:1|1|node:1|1")
+        == "parent:1|1|child:1"
+    )
+    assert (
+        _checkpoint_ns_for_parent_command("parent:1|1|child:1|1|node:1")
+        == "parent:1|1|child:1"
+    )
+
+
 def test_should_retry_default_retry_on():
     """Test the default retry_on function."""
     import httpx

libs/langgraph/tests/test_serde_allowlist.py

@@ -0,0 +1,159 @@
+from __future__ import annotations
+
+from collections import deque
+from dataclasses import dataclass
+from enum import Enum
+from typing import TYPE_CHECKING, Annotated, Any, Literal, NewType, Optional, Union
+
+import pytest
+from pydantic import BaseModel
+from typing_extensions import NotRequired, Required, TypedDict
+
+from langgraph._internal._serde import (
+    collect_allowlist_from_schemas,
+    curated_core_allowlist,
+)
+
+
+class Color(Enum):
+    RED = "red"
+    BLUE = "blue"
+
+
+@dataclass
+class InnerDataclass:
+    value: int
+
+
+class InnerModel(BaseModel):
+    name: str
+
+
+@dataclass
+class Node:
+    value: int
+    child: Node | None = None
+
+
+if TYPE_CHECKING:
+
+    class MissingType:
+        pass
+
+
+@dataclass
+class MissingRefDataclass:
+    payload: MissingType
+
+
+class Payload(TypedDict):
+    item: InnerDataclass
+    maybe: NotRequired[InnerModel]
+    required: Required[str]
+
+
+@dataclass
+class NestedDataclass:
+    inner: InnerDataclass
+    items: list[InnerModel]
+    mapping: dict[str, InnerDataclass]
+    optional: InnerModel | None
+    union: InnerDataclass | InnerModel
+    queue: deque[InnerDataclass]
+    frozen: frozenset[InnerModel]
+
+
+AnnotatedList = Annotated[list[InnerDataclass], "meta"]
+UserId = NewType("UserId", int)
+
+
+class DummyChannel:
+    @property
+    def ValueType(self) -> type[InnerDataclass]:
+        return InnerDataclass
+
+    @property
+    def UpdateType(self) -> type[InnerModel]:
+        return InnerModel
+
+
+def test_curated_core_allowlist_includes_messages() -> None:
+    try:
+        from langchain_core.messages import BaseMessage
+    except Exception:
+        pytest.skip("langchain_core not available")
+    allowlist = curated_core_allowlist()
+    assert (BaseMessage.__module__, BaseMessage.__name__) in allowlist
+
+
+def test_collect_allowlist_basic_models() -> None:
+    allowlist = collect_allowlist_from_schemas(
+        schemas=[InnerDataclass, InnerModel, Color]
+    )
+    assert (InnerDataclass.__module__, InnerDataclass.__name__) in allowlist
+    assert (InnerModel.__module__, InnerModel.__name__) in allowlist
+    assert (Color.__module__, Color.__name__) in allowlist
+
+
+def test_collect_allowlist_nested_containers() -> None:
+    allowlist = collect_allowlist_from_schemas(schemas=[NestedDataclass])
+    assert (NestedDataclass.__module__, NestedDataclass.__name__) in allowlist
+    assert (InnerDataclass.__module__, InnerDataclass.__name__) in allowlist
+    assert (InnerModel.__module__, InnerModel.__name__) in allowlist
+
+
+def test_collect_allowlist_annotated_and_union() -> None:
+    allowlist = collect_allowlist_from_schemas(
+        schemas=[AnnotatedList, InnerModel | None, InnerDataclass | None]
+    )
+    assert (InnerDataclass.__module__, InnerDataclass.__name__) in allowlist
+    assert (InnerModel.__module__, InnerModel.__name__) in allowlist
+
+
+def test_collect_allowlist_literal_and_any() -> None:
+    allowlist = collect_allowlist_from_schemas(schemas=[Any, Literal["a"]])
+    assert allowlist == set()
+
+
+def test_collect_allowlist_typeddict_fields_only() -> None:
+    allowlist = collect_allowlist_from_schemas(schemas=[Payload])
+    assert (InnerDataclass.__module__, InnerDataclass.__name__) in allowlist
+    assert (InnerModel.__module__, InnerModel.__name__) in allowlist
+    assert (Payload.__module__, Payload.__name__) not in allowlist
+
+
+def test_collect_allowlist_forward_refs() -> None:
+    allowlist = collect_allowlist_from_schemas(schemas=[Node])
+    assert (Node.__module__, Node.__name__) in allowlist
+
+
+def test_collect_allowlist_missing_forward_ref() -> None:
+    allowlist = collect_allowlist_from_schemas(schemas=[MissingRefDataclass])
+    assert allowlist == {(MissingRefDataclass.__module__, MissingRefDataclass.__name__)}
+
+
+def test_collect_allowlist_newtype_supertype() -> None:
+    allowlist = collect_allowlist_from_schemas(schemas=[UserId])
+    assert allowlist == set()
+
+
+def test_collect_allowlist_channels() -> None:
+    channels = {"a": DummyChannel(), "b": DummyChannel()}
+    allowlist = collect_allowlist_from_schemas(channels=channels)
+    assert (InnerDataclass.__module__, InnerDataclass.__name__) in allowlist
+    assert (InnerModel.__module__, InnerModel.__name__) in allowlist
+
+
+def test_collect_allowlist_pep604_union() -> None:
+    schema = InnerDataclass | InnerModel
+    allowlist = collect_allowlist_from_schemas(schemas=[schema])
+    assert (InnerDataclass.__module__, InnerDataclass.__name__) in allowlist
+    assert (InnerModel.__module__, InnerModel.__name__) in allowlist
+
+
+def test_collect_allowlist_typing_union_optional() -> None:
+    typing_optional = Optional[InnerDataclass]  # noqa: UP045
+    typing_union = Union[InnerDataclass, InnerModel]  # noqa: UP007
+    allowlist = collect_allowlist_from_schemas(schemas=[typing_optional, typing_union])
+    assert (InnerDataclass.__module__, InnerDataclass.__name__) in allowlist
+    assert (InnerModel.__module__, InnerModel.__name__) in allowlist

libs/langgraph/tests/test_subgraph_persistence.py

@@ -0,0 +1,641 @@
+"""Tests for subgraph persistence behavior (sync).
+
+Covers three checkpointer settings for subgraph state:
+- checkpointer=False: no persistence, even when parent has a checkpointer
+- checkpointer=None (default): "stateless" — inherits parent checkpointer for
+  interrupt support, but state resets each invocation. This is the common case
+  when an agent is invoked from inside a tool used by another agent.
+- checkpointer=True: "stateful" — state accumulates across invocations on the same thread id
+"""
+
+from uuid import uuid4
+
+from langchain_core.messages import AIMessage, HumanMessage
+from langgraph.checkpoint.base import BaseCheckpointSaver
+from typing_extensions import TypedDict
+
+from langgraph.graph import START, StateGraph
+from langgraph.graph.message import MessagesState
+from langgraph.types import Command, Interrupt, interrupt
+from tests.any_str import AnyStr
+
+
+class ParentState(TypedDict):
+    result: str
+
+
+# -- checkpointer=None (stateless) --
+
+
+def test_stateless_interrupt_resume(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=None (the default) can
+    still support interrupt/resume when invoked from inside a parent graph that
+    has a checkpointer. This is the "stateless" pattern — the subgraph inherits
+    the parent's checkpointer just enough to pause and resume, but does not
+    retain any state across separate parent invocations. This pattern commonly
+    appears when an agent is invoked from inside a tool used by another agent.
+    """
+
+    # Build a subgraph that interrupts before echoing.
+    # Two nodes: "process" interrupts then echoes, "respond" returns "Done".
+    def process(state: MessagesState) -> dict:
+        interrupt("continue?")
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    def respond(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content="Done")]}
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("process", process)
+        .add_node("respond", respond)
+        .add_edge(START, "process")
+        .add_edge("process", "respond")
+        .compile()
+    )
+
+    def call_inner(state: ParentState) -> dict:
+        resp = inner.invoke({"messages": [HumanMessage(content="apples")]})
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    # First invoke hits the interrupt
+    result = parent.invoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+
+    # Resume completes the subgraph
+    result = parent.invoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+
+def test_stateless_state_resets(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=None (the default) does
+    not retain any message history between separate parent invocations. Each time
+    the parent graph invokes the subgraph, it starts with a clean slate. This
+    confirms the "stateless" behavior: even though the parent has a checkpointer,
+    the subgraph state is not persisted across calls.
+    """
+
+    # Build a simple echo subgraph: echoes "Processing: <input>"
+    def echo(state: MessagesState) -> dict:
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", echo)
+        .add_edge(START, "echo")
+        .compile()
+    )
+
+    subgraph_messages: list[list[str]] = []
+    call_count = 0
+
+    def call_inner(state: ParentState) -> dict:
+        nonlocal call_count
+        call_count += 1
+        topic = "apples" if call_count == 1 else "bananas"
+        resp = inner.invoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    result1 = parent.invoke({"result": ""}, config)
+    assert result1 == {"result": "Processing: tell me about apples"}
+
+    result2 = parent.invoke({"result": ""}, config)
+    assert result2 == {"result": "Processing: tell me about bananas"}
+
+    # Both invocations produce fresh history — no memory of prior call
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+    ]
+    assert subgraph_messages[1] == [
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+    ]
+
+
+def test_stateless_state_resets_with_interrupt(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=None resets its state
+    between parent invocations even when interrupt/resume is used. The subgraph
+    is invoked twice from the parent, each time with an interrupt that must be
+    resumed. After both invoke+resume cycles, each subgraph run should only
+    contain its own messages — no bleed-over from the previous run.
+    """
+
+    # Build a subgraph that interrupts before echoing, then responds "Done"
+    def process(state: MessagesState) -> dict:
+        interrupt("continue?")
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    def respond(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content="Done")]}
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("process", process)
+        .add_node("respond", respond)
+        .add_edge(START, "process")
+        .add_edge("process", "respond")
+        .compile()
+    )
+
+    subgraph_messages: list[list[str]] = []
+    call_count = 0
+
+    def call_inner(state: ParentState) -> dict:
+        nonlocal call_count
+        call_count += 1
+        topic = "apples" if call_count == 1 else "bananas"
+        resp = inner.invoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    # First invoke+resume cycle
+    result = parent.invoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+    result = parent.invoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+    # Second invoke+resume cycle
+    result = parent.invoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+    result = parent.invoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+    # Both invocations produce fresh history — no memory of prior call
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+    ]
+    assert subgraph_messages[1] == [
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+        "Done",
+    ]
+
+
+# -- checkpointer=False --
+
+
+def test_checkpointer_false_no_persistence(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=False gets no
+    persistence at all, even when the parent graph has a checkpointer. Unlike
+    the default (checkpointer=None) which inherits just enough from the parent
+    to support interrupt/resume, checkpointer=False explicitly opts out of all
+    checkpoint behavior. Each invocation starts completely fresh.
+    """
+
+    # Build a simple echo subgraph with checkpointer=False
+    def echo(state: MessagesState) -> dict:
+        return {
+            "messages": [AIMessage(content=f"Processed: {state['messages'][-1].text}")]
+        }
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", echo)
+        .add_edge(START, "echo")
+        .compile(checkpointer=False)
+    )
+
+    subgraph_messages: list[list[str]] = []
+    call_count = 0
+
+    def call_inner(state: ParentState) -> dict:
+        nonlocal call_count
+        call_count += 1
+        topic = "apples" if call_count == 1 else "bananas"
+        resp = inner.invoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    result1 = parent.invoke({"result": ""}, config)
+    assert result1 == {"result": "Processed: tell me about apples"}
+
+    result2 = parent.invoke({"result": ""}, config)
+    assert result2 == {"result": "Processed: tell me about bananas"}
+
+    # Both start fresh — no history from first call
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processed: tell me about apples",
+    ]
+    assert subgraph_messages[1] == [
+        "tell me about bananas",
+        "Processed: tell me about bananas",
+    ]
+
+
+# -- checkpointer=True (stateful) --
+
+
+def test_stateful_state_accumulates(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=True ("stateful")
+    retains its message history across separate parent invocations. To enable
+    this, the subgraph is wrapped in an outer graph compiled with
+    checkpointer=True — this wrapper gives the inner subgraph its own persistent
+    checkpoint namespace. After two parent calls, the second subgraph invocation
+    should see messages from both the first and second calls.
+    """
+
+    # Build a simple echo subgraph
+    def echo(state: MessagesState) -> dict:
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", echo)
+        .add_edge(START, "echo")
+        .compile()
+    )
+
+    # Wrap the inner subgraph with checkpointer=True to enable stateful.
+    # The wrapper graph gives the subgraph its own persistent checkpoint
+    # namespace, keyed by the node name ("agent").
+    wrapper = (
+        StateGraph(MessagesState)
+        .add_node("agent", inner)
+        .add_edge(START, "agent")
+        .compile(checkpointer=True)
+    )
+
+    subgraph_messages: list[list[str]] = []
+    topics = ["apples", "bananas"]
+
+    def call_inner(state: ParentState) -> dict:
+        topic = topics[len(subgraph_messages)]
+        resp = wrapper.invoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    result1 = parent.invoke({"result": ""}, config)
+    assert result1 == {"result": "Processing: tell me about apples"}
+
+    result2 = parent.invoke({"result": ""}, config)
+    assert result2 == {"result": "Processing: tell me about bananas"}
+
+    # First call: fresh history
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+    ]
+    # Second call: retains messages from first call
+    assert subgraph_messages[1] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+    ]
+
+
+def test_stateful_state_accumulates_with_interrupt(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a stateful subgraph (checkpointer=True) retains its
+    message history across parent invocations even when interrupt/resume is
+    involved. The subgraph interrupts before echoing, then responds "Done".
+    After two invoke+resume cycles, the second run should contain the full
+    accumulated history from both calls.
+    """
+
+    # Build a subgraph that interrupts before echoing, then responds "Done"
+    def process(state: MessagesState) -> dict:
+        interrupt("continue?")
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    def respond(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content="Done")]}
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("process", process)
+        .add_node("respond", respond)
+        .add_edge(START, "process")
+        .add_edge("process", "respond")
+        .compile()
+    )
+
+    # Wrap with checkpointer=True for stateful
+    wrapper = (
+        StateGraph(MessagesState)
+        .add_node("agent", inner)
+        .add_edge(START, "agent")
+        .compile(checkpointer=True)
+    )
+
+    subgraph_messages: list[list[str]] = []
+    topics = ["apples", "bananas"]
+
+    def call_inner(state: ParentState) -> dict:
+        topic = topics[len(subgraph_messages)]
+        resp = wrapper.invoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    # First invoke+resume cycle
+    result = parent.invoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+    result = parent.invoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+    # Second invoke+resume cycle
+    result = parent.invoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+    result = parent.invoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+    # First call: fresh history
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+    ]
+    # Second call: retains messages from first call
+    assert subgraph_messages[1] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+        "Done",
+    ]
+
+
+def test_stateful_interrupt_resume(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a stateful subgraph (checkpointer=True) correctly
+    supports interrupt/resume while also accumulating state. Each invoke+resume
+    pair triggers the subgraph, and after the second pair completes we verify
+    both the per-step invoke outputs and the accumulated message history. This
+    exercises the full lifecycle: interrupt, resume, state accumulation.
+    """
+
+    # Build a subgraph that interrupts before echoing, then responds "Done"
+    def process(state: MessagesState) -> dict:
+        interrupt("continue?")
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    def respond(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content="Done")]}
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("process", process)
+        .add_node("respond", respond)
+        .add_edge(START, "process")
+        .add_edge("process", "respond")
+        .compile()
+    )
+
+    # Wrap with checkpointer=True for stateful
+    wrapper = (
+        StateGraph(MessagesState)
+        .add_node("agent", inner)
+        .add_edge(START, "agent")
+        .compile(checkpointer=True)
+    )
+
+    subgraph_messages: list[list[str]] = []
+    topics = ["apples", "bananas"]
+
+    def call_inner(state: ParentState) -> dict:
+        topic = topics[len(subgraph_messages)]
+        resp = wrapper.invoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    # First invocation: hits interrupt
+    result = parent.invoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+
+    # Resume: completes first call
+    result = parent.invoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+    ]
+
+    # Second invocation: hits interrupt, state accumulated from first call
+    result = parent.invoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+
+    # Resume: completes second call with accumulated state
+    result = parent.invoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+    assert subgraph_messages[1] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+        "Done",
+    ]
+
+
+def test_stateful_namespace_isolation(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that two different stateful subgraphs (checkpointer=True)
+    maintain completely independent state when they use different wrapper node
+    names. A "fruit_agent" and "veggie_agent" are each wrapped in their own
+    stateful graph. After two parent invocations, each agent should only
+    see its own accumulated history with no cross-contamination between them.
+    """
+
+    # Build two simple echo subgraphs with different prefixes
+    def fruit_echo(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content=f"Fruit: {state['messages'][-1].text}")]}
+
+    def veggie_echo(state: MessagesState) -> dict:
+        return {
+            "messages": [AIMessage(content=f"Veggie: {state['messages'][-1].text}")]
+        }
+
+    fruit_inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", fruit_echo)
+        .add_edge(START, "echo")
+        .compile()
+    )
+    veggie_inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", veggie_echo)
+        .add_edge(START, "echo")
+        .compile()
+    )
+
+    # Wrap each with checkpointer=True, using different node names to get
+    # independent checkpoint namespaces
+    fruit = (
+        StateGraph(MessagesState)
+        .add_node("fruit_agent", fruit_inner)
+        .add_edge(START, "fruit_agent")
+        .compile(checkpointer=True)
+    )
+    veggie = (
+        StateGraph(MessagesState)
+        .add_node("veggie_agent", veggie_inner)
+        .add_edge(START, "veggie_agent")
+        .compile(checkpointer=True)
+    )
+
+    fruit_msgs: list[list[str]] = []
+    veggie_msgs: list[list[str]] = []
+    call_count = 0
+
+    def call_both(state: ParentState) -> dict:
+        nonlocal call_count
+        call_count += 1
+        suffix = "round 1" if call_count == 1 else "round 2"
+        f = fruit.invoke({"messages": [HumanMessage(content=f"cherries {suffix}")]})
+        v = veggie.invoke({"messages": [HumanMessage(content=f"broccoli {suffix}")]})
+        fruit_msgs.append([m.text for m in f["messages"]])
+        veggie_msgs.append([m.text for m in v["messages"]])
+        return {"result": f["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_both", call_both)
+        .add_edge(START, "call_both")
+        .compile(checkpointer=sync_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    result1 = parent.invoke({"result": ""}, config)
+    assert result1 == {"result": "Fruit: cherries round 1"}
+
+    result2 = parent.invoke({"result": ""}, config)
+    assert result2 == {"result": "Fruit: cherries round 2"}
+
+    # First call: each agent sees only its own history
+    assert fruit_msgs[0] == ["cherries round 1", "Fruit: cherries round 1"]
+    assert veggie_msgs[0] == ["broccoli round 1", "Veggie: broccoli round 1"]
+
+    # Second call: each accumulated independently — no cross-contamination
+    assert fruit_msgs[1] == [
+        "cherries round 1",
+        "Fruit: cherries round 1",
+        "cherries round 2",
+        "Fruit: cherries round 2",
+    ]
+    assert veggie_msgs[1] == [
+        "broccoli round 1",
+        "Veggie: broccoli round 1",
+        "broccoli round 2",
+        "Veggie: broccoli round 2",
+    ]

libs/langgraph/tests/test_subgraph_persistence_async.py

@@ -0,0 +1,662 @@
+"""Tests for subgraph persistence behavior (async).
+
+Covers three checkpointer settings for subgraph state:
+- checkpointer=False: no persistence, even when parent has a checkpointer
+- checkpointer=None (default): "stateless" — inherits parent checkpointer for
+  interrupt support, but state resets each invocation. This is the common case
+  when an agent is invoked from inside a tool used by another agent.
+- checkpointer=True: "stateful" — state accumulates across invocations on the same thread id
+"""
+
+import sys
+from uuid import uuid4
+
+import pytest
+from langchain_core.messages import AIMessage, HumanMessage
+from langgraph.checkpoint.base import BaseCheckpointSaver
+from typing_extensions import TypedDict
+
+from langgraph.graph import START, StateGraph
+from langgraph.graph.message import MessagesState
+from langgraph.types import Command, Interrupt, interrupt
+from tests.any_str import AnyStr
+
+pytestmark = pytest.mark.anyio
+
+NEEDS_CONTEXTVARS = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="Python 3.11+ is required for async contextvars support",
+)
+
+
+class ParentState(TypedDict):
+    result: str
+
+
+# -- checkpointer=None (stateless) --
+
+
+@NEEDS_CONTEXTVARS
+async def test_stateless_interrupt_resume_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=None (the default) can
+    still support interrupt/resume when invoked from inside a parent graph that
+    has a checkpointer. This is the "stateless" pattern — the subgraph inherits
+    the parent's checkpointer just enough to pause and resume, but does not
+    retain any state across separate parent invocations. This pattern commonly
+    appears when an agent is invoked from inside a tool used by another agent.
+    """
+
+    # Build a subgraph that interrupts before echoing.
+    # Two nodes: "process" interrupts then echoes, "respond" returns "Done".
+    def process(state: MessagesState) -> dict:
+        interrupt("continue?")
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    def respond(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content="Done")]}
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("process", process)
+        .add_node("respond", respond)
+        .add_edge(START, "process")
+        .add_edge("process", "respond")
+        .compile()
+    )
+
+    async def call_inner(state: ParentState) -> dict:
+        resp = await inner.ainvoke({"messages": [HumanMessage(content="apples")]})
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=async_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    # First invoke hits the interrupt
+    result = await parent.ainvoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+
+    # Resume completes the subgraph
+    result = await parent.ainvoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+
+@NEEDS_CONTEXTVARS
+async def test_stateless_state_resets_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=None (the default) does
+    not retain any message history between separate parent invocations. Each time
+    the parent graph invokes the subgraph, it starts with a clean slate. This
+    confirms the "stateless" behavior: even though the parent has a checkpointer,
+    the subgraph state is not persisted across calls.
+    """
+
+    # Build a simple echo subgraph: echoes "Processing: <input>"
+    def echo(state: MessagesState) -> dict:
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", echo)
+        .add_edge(START, "echo")
+        .compile()
+    )
+
+    subgraph_messages: list[list[str]] = []
+    call_count = 0
+
+    async def call_inner(state: ParentState) -> dict:
+        nonlocal call_count
+        call_count += 1
+        topic = "apples" if call_count == 1 else "bananas"
+        resp = await inner.ainvoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=async_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    result1 = await parent.ainvoke({"result": ""}, config)
+    assert result1 == {"result": "Processing: tell me about apples"}
+
+    result2 = await parent.ainvoke({"result": ""}, config)
+    assert result2 == {"result": "Processing: tell me about bananas"}
+
+    # Both invocations produce fresh history — no memory of prior call
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+    ]
+    assert subgraph_messages[1] == [
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+    ]
+
+
+@NEEDS_CONTEXTVARS
+async def test_stateless_state_resets_with_interrupt_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=None resets its state
+    between parent invocations even when interrupt/resume is used. The subgraph
+    is invoked twice from the parent, each time with an interrupt that must be
+    resumed. After both invoke+resume cycles, each subgraph run should only
+    contain its own messages — no bleed-over from the previous run.
+    """
+
+    # Build a subgraph that interrupts before echoing, then responds "Done"
+    def process(state: MessagesState) -> dict:
+        interrupt("continue?")
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    def respond(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content="Done")]}
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("process", process)
+        .add_node("respond", respond)
+        .add_edge(START, "process")
+        .add_edge("process", "respond")
+        .compile()
+    )
+
+    subgraph_messages: list[list[str]] = []
+    call_count = 0
+
+    async def call_inner(state: ParentState) -> dict:
+        nonlocal call_count
+        call_count += 1
+        topic = "apples" if call_count == 1 else "bananas"
+        resp = await inner.ainvoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=async_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    # First invoke+resume cycle
+    result = await parent.ainvoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+    result = await parent.ainvoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+    # Second invoke+resume cycle
+    result = await parent.ainvoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+    result = await parent.ainvoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+    # Both invocations produce fresh history — no memory of prior call
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+    ]
+    assert subgraph_messages[1] == [
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+        "Done",
+    ]
+
+
+# -- checkpointer=False --
+
+
+@NEEDS_CONTEXTVARS
+async def test_checkpointer_false_no_persistence_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=False gets no
+    persistence at all, even when the parent graph has a checkpointer. Unlike
+    the default (checkpointer=None) which inherits just enough from the parent
+    to support interrupt/resume, checkpointer=False explicitly opts out of all
+    checkpoint behavior. Each invocation starts completely fresh.
+    """
+
+    # Build a simple echo subgraph with checkpointer=False
+    def echo(state: MessagesState) -> dict:
+        return {
+            "messages": [AIMessage(content=f"Processed: {state['messages'][-1].text}")]
+        }
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", echo)
+        .add_edge(START, "echo")
+        .compile(checkpointer=False)
+    )
+
+    subgraph_messages: list[list[str]] = []
+    call_count = 0
+
+    async def call_inner(state: ParentState) -> dict:
+        nonlocal call_count
+        call_count += 1
+        topic = "apples" if call_count == 1 else "bananas"
+        resp = await inner.ainvoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=async_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    result1 = await parent.ainvoke({"result": ""}, config)
+    assert result1 == {"result": "Processed: tell me about apples"}
+
+    result2 = await parent.ainvoke({"result": ""}, config)
+    assert result2 == {"result": "Processed: tell me about bananas"}
+
+    # Both start fresh — no history from first call
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processed: tell me about apples",
+    ]
+    assert subgraph_messages[1] == [
+        "tell me about bananas",
+        "Processed: tell me about bananas",
+    ]
+
+
+# -- checkpointer=True (stateful) --
+
+
+@NEEDS_CONTEXTVARS
+async def test_stateful_state_accumulates_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a subgraph compiled with checkpointer=True ("stateful")
+    retains its message history across separate parent invocations. To enable
+    this, the subgraph is wrapped in an outer graph compiled with
+    checkpointer=True — this wrapper gives the inner subgraph its own persistent
+    checkpoint namespace. After two parent calls, the second subgraph invocation
+    should see messages from both the first and second calls.
+    """
+
+    # Build a simple echo subgraph
+    def echo(state: MessagesState) -> dict:
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", echo)
+        .add_edge(START, "echo")
+        .compile()
+    )
+
+    # Wrap the inner subgraph with checkpointer=True to enable stateful.
+    # The wrapper graph gives the subgraph its own persistent checkpoint
+    # namespace, keyed by the node name ("agent").
+    wrapper = (
+        StateGraph(MessagesState)
+        .add_node("agent", inner)
+        .add_edge(START, "agent")
+        .compile(checkpointer=True)
+    )
+
+    subgraph_messages: list[list[str]] = []
+    topics = ["apples", "bananas"]
+
+    async def call_inner(state: ParentState) -> dict:
+        topic = topics[len(subgraph_messages)]
+        resp = await wrapper.ainvoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=async_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    result1 = await parent.ainvoke({"result": ""}, config)
+    assert result1 == {"result": "Processing: tell me about apples"}
+
+    result2 = await parent.ainvoke({"result": ""}, config)
+    assert result2 == {"result": "Processing: tell me about bananas"}
+
+    # First call: fresh history
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+    ]
+    # Second call: retains messages from first call
+    assert subgraph_messages[1] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+    ]
+
+
+@NEEDS_CONTEXTVARS
+async def test_stateful_state_accumulates_with_interrupt_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a stateful subgraph (checkpointer=True) retains its
+    message history across parent invocations even when interrupt/resume is
+    involved. The subgraph interrupts before echoing, then responds "Done".
+    After two invoke+resume cycles, the second run should contain the full
+    accumulated history from both calls.
+    """
+
+    # Build a subgraph that interrupts before echoing, then responds "Done"
+    def process(state: MessagesState) -> dict:
+        interrupt("continue?")
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    def respond(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content="Done")]}
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("process", process)
+        .add_node("respond", respond)
+        .add_edge(START, "process")
+        .add_edge("process", "respond")
+        .compile()
+    )
+
+    # Wrap with checkpointer=True for stateful
+    wrapper = (
+        StateGraph(MessagesState)
+        .add_node("agent", inner)
+        .add_edge(START, "agent")
+        .compile(checkpointer=True)
+    )
+
+    subgraph_messages: list[list[str]] = []
+    topics = ["apples", "bananas"]
+
+    async def call_inner(state: ParentState) -> dict:
+        topic = topics[len(subgraph_messages)]
+        resp = await wrapper.ainvoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=async_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    # First invoke+resume cycle
+    result = await parent.ainvoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+    result = await parent.ainvoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+    # Second invoke+resume cycle
+    result = await parent.ainvoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+    result = await parent.ainvoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+
+    # First call: fresh history
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+    ]
+    # Second call: retains messages from first call
+    assert subgraph_messages[1] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+        "Done",
+    ]
+
+
+@NEEDS_CONTEXTVARS
+async def test_stateful_interrupt_resume_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that a stateful subgraph (checkpointer=True) correctly
+    supports interrupt/resume while also accumulating state. Each invoke+resume
+    pair triggers the subgraph, and after the second pair completes we verify
+    both the per-step invoke outputs and the accumulated message history. This
+    exercises the full lifecycle: interrupt, resume, state accumulation.
+    """
+
+    # Build a subgraph that interrupts before echoing, then responds "Done"
+    def process(state: MessagesState) -> dict:
+        interrupt("continue?")
+        return {
+            "messages": [AIMessage(content=f"Processing: {state['messages'][-1].text}")]
+        }
+
+    def respond(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content="Done")]}
+
+    inner = (
+        StateGraph(MessagesState)
+        .add_node("process", process)
+        .add_node("respond", respond)
+        .add_edge(START, "process")
+        .add_edge("process", "respond")
+        .compile()
+    )
+
+    # Wrap with checkpointer=True for stateful
+    wrapper = (
+        StateGraph(MessagesState)
+        .add_node("agent", inner)
+        .add_edge(START, "agent")
+        .compile(checkpointer=True)
+    )
+
+    subgraph_messages: list[list[str]] = []
+    topics = ["apples", "bananas"]
+
+    async def call_inner(state: ParentState) -> dict:
+        topic = topics[len(subgraph_messages)]
+        resp = await wrapper.ainvoke(
+            {"messages": [HumanMessage(content=f"tell me about {topic}")]}
+        )
+        subgraph_messages.append([m.text for m in resp["messages"]])
+        return {"result": resp["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_inner", call_inner)
+        .add_edge(START, "call_inner")
+        .compile(checkpointer=async_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    # First invocation: hits interrupt
+    result = await parent.ainvoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+
+    # Resume: completes first call
+    result = await parent.ainvoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+    assert subgraph_messages[0] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+    ]
+
+    # Second invocation: hits interrupt, state accumulated from first call
+    result = await parent.ainvoke({"result": ""}, config)
+    assert result == {
+        "result": "",
+        "__interrupt__": [Interrupt(value="continue?", id=AnyStr())],
+    }
+
+    # Resume: completes second call with accumulated state
+    result = await parent.ainvoke(Command(resume=True), config)
+    assert result == {"result": "Done"}
+    assert subgraph_messages[1] == [
+        "tell me about apples",
+        "Processing: tell me about apples",
+        "Done",
+        "tell me about bananas",
+        "Processing: tell me about bananas",
+        "Done",
+    ]
+
+
+@NEEDS_CONTEXTVARS
+async def test_stateful_namespace_isolation_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    """Tests that two different stateful subgraphs (checkpointer=True)
+    maintain completely independent state when they use different wrapper node
+    names. A "fruit_agent" and "veggie_agent" are each wrapped in their own
+    stateful graph. After two parent invocations, each agent should only
+    see its own accumulated history with no cross-contamination between them.
+    """
+
+    # Build two simple echo subgraphs with different prefixes
+    def fruit_echo(state: MessagesState) -> dict:
+        return {"messages": [AIMessage(content=f"Fruit: {state['messages'][-1].text}")]}
+
+    def veggie_echo(state: MessagesState) -> dict:
+        return {
+            "messages": [AIMessage(content=f"Veggie: {state['messages'][-1].text}")]
+        }
+
+    fruit_inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", fruit_echo)
+        .add_edge(START, "echo")
+        .compile()
+    )
+    veggie_inner = (
+        StateGraph(MessagesState)
+        .add_node("echo", veggie_echo)
+        .add_edge(START, "echo")
+        .compile()
+    )
+
+    # Wrap each with checkpointer=True, using different node names to get
+    # independent checkpoint namespaces
+    fruit = (
+        StateGraph(MessagesState)
+        .add_node("fruit_agent", fruit_inner)
+        .add_edge(START, "fruit_agent")
+        .compile(checkpointer=True)
+    )
+    veggie = (
+        StateGraph(MessagesState)
+        .add_node("veggie_agent", veggie_inner)
+        .add_edge(START, "veggie_agent")
+        .compile(checkpointer=True)
+    )
+
+    fruit_msgs: list[list[str]] = []
+    veggie_msgs: list[list[str]] = []
+    call_count = 0
+
+    async def call_both(state: ParentState) -> dict:
+        nonlocal call_count
+        call_count += 1
+        suffix = "round 1" if call_count == 1 else "round 2"
+        f = await fruit.ainvoke(
+            {"messages": [HumanMessage(content=f"cherries {suffix}")]}
+        )
+        v = await veggie.ainvoke(
+            {"messages": [HumanMessage(content=f"broccoli {suffix}")]}
+        )
+        fruit_msgs.append([m.text for m in f["messages"]])
+        veggie_msgs.append([m.text for m in v["messages"]])
+        return {"result": f["messages"][-1].text}
+
+    parent = (
+        StateGraph(ParentState)
+        .add_node("call_both", call_both)
+        .add_edge(START, "call_both")
+        .compile(checkpointer=async_checkpointer)
+    )
+    config = {"configurable": {"thread_id": str(uuid4())}}
+
+    result1 = await parent.ainvoke({"result": ""}, config)
+    assert result1 == {"result": "Fruit: cherries round 1"}
+
+    result2 = await parent.ainvoke({"result": ""}, config)
+    assert result2 == {"result": "Fruit: cherries round 2"}
+
+    # First call: each agent sees only its own history
+    assert fruit_msgs[0] == ["cherries round 1", "Fruit: cherries round 1"]
+    assert veggie_msgs[0] == ["broccoli round 1", "Veggie: broccoli round 1"]
+
+    # Second call: each accumulated independently — no cross-contamination
+    assert fruit_msgs[1] == [
+        "cherries round 1",
+        "Fruit: cherries round 1",
+        "cherries round 2",
+        "Fruit: cherries round 2",
+    ]
+    assert veggie_msgs[1] == [
+        "broccoli round 1",
+        "Veggie: broccoli round 1",
+        "broccoli round 2",
+        "Veggie: broccoli round 2",
+    ]

libs/langgraph/uv.lock

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 [[package]]
 name = "langgraph"
-version = "1.0.8"
+version = "1.0.10"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },
@@ -1548,7 +1548,7 @@ wheels = [
 
 [[package]]
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-version = "4.0.0"
+version = "4.0.1"
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     { name = "numpy" },
     { name = "pandas" },
     { name = "pandas-stubs", specifier = ">=2.2.2.240807" },
+    { name = "pycryptodome", specifier = ">=3.23.0" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -1735,7 +1736,7 @@ test = [
 
 [[package]]
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-version = "1.0.7"
+version = "1.0.8"
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 ]
 
 [[package]]

libs/prebuilt/Makefile

@@ -1,4 +1,4 @@
-.PHONY: all format lint test test-fast test_watch integration_tests spell_check spell_fix benchmark profile
+.PHONY: all format lint type test test-fast test_watch integration_tests spell_check spell_fix benchmark profile
 
 # Default target executed when no arguments are given to make.
 all: help
@@ -50,6 +50,9 @@ lint lint_diff lint_package lint_tests:
 	[ "$(PYTHON_FILES)" = "" ] || mkdir -p $(MYPY_CACHE)
 	[ "$(PYTHON_FILES)" = "" ] || uv run mypy langgraph --cache-dir $(MYPY_CACHE)
 
+type:
+	mkdir -p $(MYPY_CACHE) && uv run mypy langgraph --cache-dir $(MYPY_CACHE)
+
 format format_diff:
 	uv run ruff format $(PYTHON_FILES)
 	uv run ruff check --fix $(PYTHON_FILES)
@@ -72,6 +75,7 @@ help:
 	@echo '-- LINTING --'
 	@echo 'format                       - run code formatters'
 	@echo 'lint                         - run linters'
+	@echo 'type                         - run type checking'
 	@echo 'spell_check               	- run codespell on the project'
 	@echo 'spell_fix               		- run codespell on the project and fix the errors'
 	@echo '-- TESTS --'

libs/prebuilt/langgraph/prebuilt/tool_node.py

@@ -922,7 +922,7 @@ class ToolNode(RunnableCallable):
             raise TypeError(msg)
 
         # Inject state, store, and runtime right before invocation
-        injected_call = self._inject_tool_args(call, request.runtime)
+        injected_call = self._inject_tool_args(call, request.runtime, tool)
         call_args = {**injected_call, "type": "tool_call"}
 
         try:
@@ -1075,7 +1075,7 @@ class ToolNode(RunnableCallable):
             raise TypeError(msg)
 
         # Inject state, store, and runtime right before invocation
-        injected_call = self._inject_tool_args(call, request.runtime)
+        injected_call = self._inject_tool_args(call, request.runtime, tool)
         call_args = {**injected_call, "type": "tool_call"}
 
         try:
@@ -1281,6 +1281,7 @@ class ToolNode(RunnableCallable):
         self,
         tool_call: ToolCall,
         tool_runtime: ToolRuntime,
+        tool: BaseTool | None = None,
     ) -> ToolCall:
         """Inject graph state, store, and runtime into tool call arguments.
 
@@ -1299,6 +1300,9 @@ class ToolNode(RunnableCallable):
                 Must contain 'name', 'args', 'id', and 'type' fields.
             tool_runtime: The ToolRuntime instance containing all runtime context
                 (state, config, store, context, stream_writer) to inject into tools.
+            tool: Optional tool instance. When provided, allows injection for
+                dynamically registered tools that are not in self.tools_by_name
+                (e.g., tools added via middleware's wrap_tool_call).
 
         Returns:
             A new ToolCall dictionary with the same structure as the input but with
@@ -1312,10 +1316,12 @@ class ToolNode(RunnableCallable):
             This method is called automatically during tool execution. It should not
             be called from outside the `ToolNode`.
         """
-        if tool_call["name"] not in self.tools_by_name:
-            return tool_call
-
         injected = self._injected_args.get(tool_call["name"])
+        if not injected and tool is not None:
+            # For dynamically registered tools (e.g., added via middleware's
+            # wrap_tool_call), compute injected args on-the-fly since they
+            # were not present during ToolNode initialization.
+            injected = _get_all_injected_args(tool)
         if not injected:
             return tool_call
 

libs/prebuilt/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-prebuilt"
-version = "1.0.7"
+version = "1.0.8"
 description = "Library with high-level APIs for creating and executing LangGraph agents and tools."
 authors = []
 requires-python = ">=3.10"

libs/prebuilt/tests/test_tool_node.py

@@ -1902,3 +1902,109 @@ async def test_tool_node_tool_runtime_generic() -> None:
     assert tool_message.type == "tool"
     assert tool_message.content == "test_info"
     assert tool_message.tool_call_id == "call_1"
+
+
+def test_tool_node_inject_runtime_dynamic_tool_via_wrap_tool_call() -> None:
+    """Test that ToolRuntime is injected for dynamically registered tools.
+
+    Regression test for https://github.com/langchain-ai/langchain/issues/35305.
+    When a tool is dynamically provided via wrap_tool_call (not registered at
+    ToolNode init time), ToolRuntime should still be injected into the tool.
+    """
+
+    @dec_tool
+    def static_tool(x: int) -> str:
+        """A static tool registered at init."""
+        return f"static: {x}"
+
+    @dec_tool
+    def dynamic_tool_with_runtime(x: int, runtime: ToolRuntime) -> str:
+        """A dynamic tool that needs ToolRuntime injection."""
+        return f"dynamic: x={x}, tool_call_id={runtime.tool_call_id}"
+
+    def wrap_tool_call(request, execute):
+        """Middleware that swaps in a dynamic tool."""
+        if request.tool_call["name"] == "dynamic_tool_with_runtime":
+            # Override tool to the dynamic one (not registered at init)
+            new_request = request.override(tool=dynamic_tool_with_runtime)
+            return execute(new_request)
+        return execute(request)
+
+    # ToolNode only knows about static_tool at init time
+    tool_node = ToolNode(
+        [static_tool],
+        wrap_tool_call=wrap_tool_call,
+    )
+
+    # Verify the dynamic tool is NOT in the tool node's registered tools
+    assert "dynamic_tool_with_runtime" not in tool_node.tools_by_name
+
+    # Call the dynamic tool
+    tool_call = {
+        "name": "dynamic_tool_with_runtime",
+        "args": {"x": 42},
+        "id": "call_dynamic_1",
+        "type": "tool_call",
+    }
+    msg = AIMessage("", tool_calls=[tool_call])
+    result = tool_node.invoke(
+        {"messages": [msg]},
+        config=_create_config_with_runtime(),
+    )
+
+    # ToolRuntime should be injected and the tool should execute successfully
+    tool_message = result["messages"][-1]
+    assert tool_message.content == "dynamic: x=42, tool_call_id=call_dynamic_1"
+    assert tool_message.tool_call_id == "call_dynamic_1"
+
+
+async def test_tool_node_inject_runtime_dynamic_tool_via_wrap_tool_call_async() -> None:
+    """Test that ToolRuntime is injected for dynamically registered tools (async).
+
+    Async version of the regression test for
+    https://github.com/langchain-ai/langchain/issues/35305.
+    """
+
+    @dec_tool
+    def static_tool(x: int) -> str:
+        """A static tool registered at init."""
+        return f"static: {x}"
+
+    @dec_tool
+    async def dynamic_tool_with_runtime(x: int, runtime: ToolRuntime) -> str:
+        """A dynamic async tool that needs ToolRuntime injection."""
+        return f"dynamic: x={x}, tool_call_id={runtime.tool_call_id}"
+
+    async def awrap_tool_call(request, execute):
+        """Async middleware that swaps in a dynamic tool."""
+        if request.tool_call["name"] == "dynamic_tool_with_runtime":
+            new_request = request.override(tool=dynamic_tool_with_runtime)
+            return await execute(new_request)
+        return await execute(request)
+
+    # ToolNode only knows about static_tool at init time
+    tool_node = ToolNode(
+        [static_tool],
+        awrap_tool_call=awrap_tool_call,
+    )
+
+    # Verify the dynamic tool is NOT in the tool node's registered tools
+    assert "dynamic_tool_with_runtime" not in tool_node.tools_by_name
+
+    # Call the dynamic tool
+    tool_call = {
+        "name": "dynamic_tool_with_runtime",
+        "args": {"x": 42},
+        "id": "call_dynamic_2",
+        "type": "tool_call",
+    }
+    msg = AIMessage("", tool_calls=[tool_call])
+    result = await tool_node.ainvoke(
+        {"messages": [msg]},
+        config=_create_config_with_runtime(),
+    )
+
+    # ToolRuntime should be injected and the tool should execute successfully
+    tool_message = result["messages"][-1]
+    assert tool_message.content == "dynamic: x=42, tool_call_id=call_dynamic_2"
+    assert tool_message.tool_call_id == "call_dynamic_2"

libs/prebuilt/uv.lock

@@ -268,7 +268,7 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "1.0.8"
+version = "1.0.10"
 source = { editable = "../langgraph" }
 dependencies = [
     { name = "langchain-core" },
@@ -352,7 +352,7 @@ test = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.0.0"
+version = "4.0.1"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
@@ -373,6 +373,7 @@ dev = [
     { name = "numpy" },
     { name = "pandas" },
     { name = "pandas-stubs", specifier = ">=2.2.2.240807" },
+    { name = "pycryptodome", specifier = ">=3.23.0" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -489,7 +490,7 @@ test = [
 
 [[package]]
 name = "langgraph-prebuilt"
-version = "1.0.7"
+version = "1.0.8"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },

libs/sdk-py/Makefile

@@ -1,4 +1,4 @@
-.PHONY: lint format test
+.PHONY: lint type format test
 
 test:
 	uv run pytest tests
@@ -19,6 +19,9 @@ lint lint_diff:
 	[ "$(PYTHON_FILES)" = "" ] || uv run ruff check --select I $(PYTHON_FILES)
 	uv run ty check .
 
+type:
+	uv run ty check .
+
 format format_diff:
 	uv run ruff check --select I --fix $(PYTHON_FILES)
 	uv run ruff format $(PYTHON_FILES)

libs/sdk-py/langgraph_sdk/__init__.py

@@ -3,6 +3,6 @@ from langgraph_sdk.client import get_client, get_sync_client
 from langgraph_sdk.encryption import Encryption
 from langgraph_sdk.encryption.types import EncryptionContext
 
-__version__ = "0.3.6"
+__version__ = "0.3.9"
 
 __all__ = ["Auth", "Encryption", "EncryptionContext", "get_client", "get_sync_client"]

libs/sdk-py/langgraph_sdk/_async/assistants.py

@@ -290,7 +290,7 @@ class AssistantsClient:
         """
         get_params = {"recurse": recurse}
         if params:
-            get_params = {**get_params, **params}
+            get_params = {**get_params, **dict(params)}
         if namespace is not None:
             return await self.http.get(
                 f"/assistants/{assistant_id}/subgraphs/{namespace}",
@@ -425,9 +425,9 @@ class AssistantsClient:
         payload: dict[str, Any] = {}
         if graph_id:
             payload["graph_id"] = graph_id
-        if config:
+        if config is not None:
             payload["config"] = config
-        if context:
+        if context is not None:
             payload["context"] = context
         if metadata:
             payload["metadata"] = metadata

libs/sdk-py/langgraph_sdk/_async/client.py

@@ -110,7 +110,7 @@ def get_client(
     if url is None:
         url = "http://api"
         if os.environ.get("__LANGGRAPH_DEFER_LOOPBACK_TRANSPORT") == "true":
-            transport = get_asgi_transport()(app=None, root_path="/noauth")
+            transport = get_asgi_transport()(app=None, root_path="/noauth")  # type: ignore[invalid-argument-type]
             _registered_transports.append(transport)
         else:
             try:
@@ -122,7 +122,7 @@ def get_client(
                     "Failed to connect to in-process LangGraph server. Deferring configuration.",
                     exc_info=True,
                 )
-                transport = get_asgi_transport()(app=None, root_path="/noauth")
+                transport = get_asgi_transport()(app=None, root_path="/noauth")  # type: ignore[invalid-argument-type]
                 _registered_transports.append(transport)
 
     if transport is None:

libs/sdk-py/langgraph_sdk/_async/cron.py

@@ -2,7 +2,8 @@
 
 from __future__ import annotations
 
-from collections.abc import Mapping
+import warnings
+from collections.abc import Mapping, Sequence
 from datetime import datetime
 from typing import Any
 
@@ -14,11 +15,13 @@ from langgraph_sdk.schema import (
     Cron,
     CronSelectField,
     CronSortBy,
+    Durability,
     Input,
     OnCompletionBehavior,
     QueryParamTypes,
     Run,
     SortOrder,
+    StreamMode,
 )
 
 
@@ -60,13 +63,17 @@ class CronClient:
         metadata: Mapping[str, Any] | None = None,
         config: Config | None = None,
         context: Context | None = None,
-        checkpoint_during: bool | None = None,
+        checkpoint_during: bool | None = None,  # deprecated
         interrupt_before: All | list[str] | None = None,
         interrupt_after: All | list[str] | None = None,
         webhook: str | None = None,
         multitask_strategy: str | None = None,
         end_time: datetime | None = None,
         enabled: bool | None = None,
+        stream_mode: StreamMode | Sequence[StreamMode] | None = None,
+        stream_subgraphs: bool | None = None,
+        stream_resumable: bool | None = None,
+        durability: Durability | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
     ) -> Run:
@@ -83,7 +90,7 @@ class CronClient:
             config: The configuration for the assistant.
             context: Static context to add to the assistant.
                 !!! version-added "Added in version 0.6.0"
-            checkpoint_during: Whether to checkpoint during the run (or only at the end/interruption).
+            checkpoint_during: (deprecated) Whether to checkpoint during the run (or only at the end/interruption).
             interrupt_before: Nodes to interrupt immediately before they get executed.
 
             interrupt_after: Nodes to Nodes to interrupt immediately after they get executed.
@@ -93,6 +100,13 @@ class CronClient:
                 Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
             end_time: The time to stop running the cron job. If not provided, the cron job will run indefinitely.
             enabled: Whether the cron job is enabled or not.
+            stream_mode: The stream mode(s) to use.
+            stream_subgraphs: Whether to stream output from subgraphs.
+            stream_resumable: Whether to persist the stream chunks in order to resume the stream later.
+            durability: Durability level for the run. Must be one of 'sync', 'async', or 'exit'.
+                "async" means checkpoints are persisted async while next graph step executes, replaces checkpoint_during=True
+                "sync" means checkpoints are persisted sync after graph step executes, replaces checkpoint_during=False
+                "exit" means checkpoints are only persisted when the run exits, does not save intermediate steps
             headers: Optional custom headers to include with the request.
             params: Optional query parameters to include with the request.
 
@@ -118,6 +132,13 @@ class CronClient:
             )
             ```
         """
+        if checkpoint_during is not None:
+            warnings.warn(
+                "`checkpoint_during` is deprecated and will be removed in a future version. Use `durability` instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
         payload = {
             "schedule": schedule,
             "input": input,
@@ -131,6 +152,10 @@ class CronClient:
             "webhook": webhook,
             "end_time": end_time.isoformat() if end_time else None,
             "enabled": enabled,
+            "stream_mode": stream_mode,
+            "stream_subgraphs": stream_subgraphs,
+            "stream_resumable": stream_resumable,
+            "durability": durability,
         }
         if multitask_strategy:
             payload["multitask_strategy"] = multitask_strategy
@@ -151,7 +176,7 @@ class CronClient:
         metadata: Mapping[str, Any] | None = None,
         config: Config | None = None,
         context: Context | None = None,
-        checkpoint_during: bool | None = None,
+        checkpoint_during: bool | None = None,  # deprecated
         interrupt_before: All | list[str] | None = None,
         interrupt_after: All | list[str] | None = None,
         webhook: str | None = None,
@@ -159,6 +184,10 @@ class CronClient:
         multitask_strategy: str | None = None,
         end_time: datetime | None = None,
         enabled: bool | None = None,
+        stream_mode: StreamMode | Sequence[StreamMode] | None = None,
+        stream_subgraphs: bool | None = None,
+        stream_resumable: bool | None = None,
+        durability: Durability | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
     ) -> Run:
@@ -174,7 +203,7 @@ class CronClient:
             config: The configuration for the assistant.
             context: Static context to add to the assistant.
                 !!! version-added "Added in version 0.6.0"
-            checkpoint_during: Whether to checkpoint during the run (or only at the end/interruption).
+            checkpoint_during: (deprecated) Whether to checkpoint during the run (or only at the end/interruption).
             interrupt_before: Nodes to interrupt immediately before they get executed.
             interrupt_after: Nodes to Nodes to interrupt immediately after they get executed.
             webhook: Webhook to call after LangGraph API call is done.
@@ -186,6 +215,13 @@ class CronClient:
                 Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
             end_time: The time to stop running the cron job. If not provided, the cron job will run indefinitely.
             enabled: Whether the cron job is enabled or not.
+            stream_mode: The stream mode(s) to use.
+            stream_subgraphs: Whether to stream output from subgraphs.
+            stream_resumable: Whether to persist the stream chunks in order to resume the stream later.
+            durability: Durability level for the run. Must be one of 'sync', 'async', or 'exit'.
+                "async" means checkpoints are persisted async while next graph step executes, replaces checkpoint_during=True
+                "sync" means checkpoints are persisted sync after graph step executes, replaces checkpoint_during=False
+                "exit" means checkpoints are only persisted when the run exits, does not save intermediate steps
             headers: Optional custom headers to include with the request.
             params: Optional query parameters to include with the request.
 
@@ -211,6 +247,13 @@ class CronClient:
             ```
 
         """
+        if checkpoint_during is not None:
+            warnings.warn(
+                "`checkpoint_during` is deprecated and will be removed in a future version. Use `durability` instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
         payload = {
             "schedule": schedule,
             "input": input,
@@ -225,6 +268,10 @@ class CronClient:
             "on_run_completed": on_run_completed,
             "end_time": end_time.isoformat() if end_time else None,
             "enabled": enabled,
+            "stream_mode": stream_mode,
+            "stream_subgraphs": stream_subgraphs,
+            "stream_resumable": stream_resumable,
+            "durability": durability,
         }
         if multitask_strategy:
             payload["multitask_strategy"] = multitask_strategy
@@ -277,6 +324,10 @@ class CronClient:
         interrupt_after: All | list[str] | None = None,
         on_run_completed: OnCompletionBehavior | None = None,
         enabled: bool | None = None,
+        stream_mode: StreamMode | Sequence[StreamMode] | None = None,
+        stream_subgraphs: bool | None = None,
+        stream_resumable: bool | None = None,
+        durability: Durability | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
     ) -> Cron:
@@ -299,6 +350,10 @@ class CronClient:
                 after execution. 'keep' creates a new thread for each execution but does not
                 clean them up.
             enabled: Enable or disable the cron job.
+            stream_mode: The stream mode(s) to use.
+            stream_subgraphs: Whether to stream output from subgraphs.
+            stream_resumable: Whether to persist the stream chunks in order to resume the stream later.
+            durability: Durability level for the run. Must be one of 'sync', 'async', or 'exit'.
             headers: Optional custom headers to include with the request.
             params: Optional query parameters to include with the request.
 
@@ -329,6 +384,10 @@ class CronClient:
             "interrupt_after": interrupt_after,
             "on_run_completed": on_run_completed,
             "enabled": enabled,
+            "stream_mode": stream_mode,
+            "stream_subgraphs": stream_subgraphs,
+            "stream_resumable": stream_resumable,
+            "durability": durability,
         }
         payload = {k: v for k, v in payload.items() if v is not None}
         return await self.http.patch(

libs/sdk-py/langgraph_sdk/_async/runs.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import builtins
 import warnings
 from collections.abc import AsyncIterator, Callable, Mapping, Sequence
 from typing import Any, overload
@@ -507,11 +508,11 @@ class RunsClient:
 
     async def create_batch(
         self,
-        payloads: list[RunCreate],
+        payloads: builtins.list[RunCreate],
         *,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
-    ) -> list[Run]:
+    ) -> builtins.list[Run]:
         """Create a batch of stateless background runs."""
 
         def filter_payload(payload: RunCreate):
@@ -547,7 +548,7 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-    ) -> list[dict] | dict[str, Any]: ...
+    ) -> builtins.list[dict] | dict[str, Any]: ...
 
     @overload
     async def wait(
@@ -572,7 +573,7 @@ class RunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-    ) -> list[dict] | dict[str, Any]: ...
+    ) -> builtins.list[dict] | dict[str, Any]: ...
 
     async def wait(
         self,
@@ -600,7 +601,7 @@ class RunsClient:
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
         durability: Durability | None = None,
-    ) -> list[dict] | dict[str, Any]:
+    ) -> builtins.list[dict] | dict[str, Any]:
         """Create a run, wait until it finishes and return the final state.
 
         Args:
@@ -751,10 +752,10 @@ class RunsClient:
         limit: int = 10,
         offset: int = 0,
         status: RunStatus | None = None,
-        select: list[RunSelectField] | None = None,
+        select: builtins.list[RunSelectField] | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
-    ) -> list[Run]:
+    ) -> builtins.list[Run]:
         """List runs.
 
         Args:

libs/sdk-py/langgraph_sdk/_async/store.py

@@ -138,7 +138,7 @@ class StoreClient:
         if refresh_ttl is not None:
             get_params["refresh_ttl"] = refresh_ttl
         if params:
-            get_params = {**get_params, **params}
+            get_params = {**get_params, **dict(params)}
         return await self.http.get("/store/items", params=get_params, headers=headers)
 
     async def delete_item(

libs/sdk-py/langgraph_sdk/_async/threads.py

@@ -260,6 +260,7 @@ class ThreadsClient:
         sort_by: ThreadSortBy | None = None,
         sort_order: SortOrder | None = None,
         select: list[ThreadSelectField] | None = None,
+        extract: dict[str, str] | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
     ) -> list[Thread]:
@@ -275,6 +276,13 @@ class ThreadsClient:
             offset: Offset in threads table to start search from.
             sort_by: Sort by field.
             sort_order: Sort order.
+            select: List of fields to include in the response.
+            extract: Dictionary mapping aliases to JSONB paths to extract
+                from thread data. Paths use dot notation for nested keys and
+                bracket notation for array indices (e.g.,
+                `{"last_msg": "values.messages[-1]"}`). Extracted values are
+                returned in an `extracted` field on each thread. Maximum 10
+                paths per request.
             headers: Optional custom headers to include with the request.
             params: Optional query parameters to include with the request.
 
@@ -312,6 +320,8 @@ class ThreadsClient:
             payload["sort_order"] = sort_order
         if select:
             payload["select"] = select
+        if extract:
+            payload["extract"] = extract
         return await self.http.post(
             "/threads/search",
             json=payload,
@@ -543,7 +553,7 @@ class ThreadsClient:
         elif checkpoint_id:
             get_params = {"subgraphs": subgraphs}
             if params:
-                get_params = {**get_params, **params}
+                get_params = {**get_params, **dict(params)}
             return await self.http.get(
                 f"/threads/{thread_id}/state/{checkpoint_id}",
                 params=get_params,
@@ -552,7 +562,7 @@ class ThreadsClient:
         else:
             get_params = {"subgraphs": subgraphs}
             if params:
-                get_params = {**get_params, **params}
+                get_params = {**get_params, **dict(params)}
             return await self.http.get(
                 f"/threads/{thread_id}/state",
                 params=get_params,

libs/sdk-py/langgraph_sdk/_sync/assistants.py

@@ -294,7 +294,7 @@ class SyncAssistantsClient:
         """
         get_params = {"recurse": recurse}
         if params:
-            get_params = {**get_params, **params}
+            get_params = {**get_params, **dict(params)}
         if namespace is not None:
             return self.http.get(
                 f"/assistants/{assistant_id}/subgraphs/{namespace}",
@@ -427,9 +427,9 @@ class SyncAssistantsClient:
         payload: dict[str, Any] = {}
         if graph_id:
             payload["graph_id"] = graph_id
-        if config:
+        if config is not None:
             payload["config"] = config
-        if context:
+        if context is not None:
             payload["context"] = context
         if metadata:
             payload["metadata"] = metadata

libs/sdk-py/langgraph_sdk/_sync/cron.py

@@ -2,7 +2,8 @@
 
 from __future__ import annotations
 
-from collections.abc import Mapping
+import warnings
+from collections.abc import Mapping, Sequence
 from datetime import datetime
 from typing import Any
 
@@ -14,11 +15,13 @@ from langgraph_sdk.schema import (
     Cron,
     CronSelectField,
     CronSortBy,
+    Durability,
     Input,
     OnCompletionBehavior,
     QueryParamTypes,
     Run,
     SortOrder,
+    StreamMode,
 )
 
 
@@ -54,13 +57,17 @@ class SyncCronClient:
         metadata: Mapping[str, Any] | None = None,
         config: Config | None = None,
         context: Context | None = None,
-        checkpoint_during: bool | None = None,
+        checkpoint_during: bool | None = None,  # deprecated
         interrupt_before: All | list[str] | None = None,
         interrupt_after: All | list[str] | None = None,
         webhook: str | None = None,
         multitask_strategy: str | None = None,
         end_time: datetime | None = None,
         enabled: bool | None = None,
+        stream_mode: StreamMode | Sequence[StreamMode] | None = None,
+        stream_subgraphs: bool | None = None,
+        stream_resumable: bool | None = None,
+        durability: Durability | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
     ) -> Run:
@@ -77,7 +84,7 @@ class SyncCronClient:
             config: The configuration for the assistant.
             context: Static context to add to the assistant.
                 !!! version-added "Added in version 0.6.0"
-            checkpoint_during: Whether to checkpoint during the run (or only at the end/interruption).
+            checkpoint_during: (deprecated) Whether to checkpoint during the run (or only at the end/interruption).
             interrupt_before: Nodes to interrupt immediately before they get executed.
             interrupt_after: Nodes to Nodes to interrupt immediately after they get executed.
             webhook: Webhook to call after LangGraph API call is done.
@@ -85,6 +92,13 @@ class SyncCronClient:
                 Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
             end_time: The time to stop running the cron job. If not provided, the cron job will run indefinitely.
             enabled: Whether the cron job is enabled. By default, it is considered enabled.
+            stream_mode: The stream mode(s) to use.
+            stream_subgraphs: Whether to stream output from subgraphs.
+            stream_resumable: Whether to persist the stream chunks in order to resume the stream later.
+            durability: Durability level for the run. Must be one of 'sync', 'async', or 'exit'.
+                "async" means checkpoints are persisted async while next graph step executes, replaces checkpoint_during=True
+                "sync" means checkpoints are persisted sync after graph step executes, replaces checkpoint_during=False
+                "exit" means checkpoints are only persisted when the run exits, does not save intermediate steps
             headers: Optional custom headers to include with the request.
 
         Returns:
@@ -109,6 +123,13 @@ class SyncCronClient:
             )
             ```
         """
+        if checkpoint_during is not None:
+            warnings.warn(
+                "`checkpoint_during` is deprecated and will be removed in a future version. Use `durability` instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
         payload = {
             "schedule": schedule,
             "input": input,
@@ -123,6 +144,10 @@ class SyncCronClient:
             "multitask_strategy": multitask_strategy,
             "end_time": end_time.isoformat() if end_time else None,
             "enabled": enabled,
+            "stream_mode": stream_mode,
+            "stream_subgraphs": stream_subgraphs,
+            "stream_resumable": stream_resumable,
+            "durability": durability,
         }
         payload = {k: v for k, v in payload.items() if v is not None}
         return self.http.post(
@@ -141,7 +166,7 @@ class SyncCronClient:
         metadata: Mapping[str, Any] | None = None,
         config: Config | None = None,
         context: Context | None = None,
-        checkpoint_during: bool | None = None,
+        checkpoint_during: bool | None = None,  # deprecated
         interrupt_before: All | list[str] | None = None,
         interrupt_after: All | list[str] | None = None,
         webhook: str | None = None,
@@ -149,6 +174,10 @@ class SyncCronClient:
         multitask_strategy: str | None = None,
         end_time: datetime | None = None,
         enabled: bool | None = None,
+        stream_mode: StreamMode | Sequence[StreamMode] | None = None,
+        stream_subgraphs: bool | None = None,
+        stream_resumable: bool | None = None,
+        durability: Durability | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
     ) -> Run:
@@ -164,7 +193,7 @@ class SyncCronClient:
             config: The configuration for the assistant.
             context: Static context to add to the assistant.
                 !!! version-added "Added in version 0.6.0"
-            checkpoint_during: Whether to checkpoint during the run (or only at the end/interruption).
+            checkpoint_during: (deprecated) Whether to checkpoint during the run (or only at the end/interruption).
             interrupt_before: Nodes to interrupt immediately before they get executed.
             interrupt_after: Nodes to Nodes to interrupt immediately after they get executed.
             webhook: Webhook to call after LangGraph API call is done.
@@ -176,6 +205,13 @@ class SyncCronClient:
                 Must be one of 'reject', 'interrupt', 'rollback', or 'enqueue'.
             end_time: The time to stop running the cron job. If not provided, the cron job will run indefinitely.
             enabled: Whether the cron job is enabled. By default, it is considered enabled.
+            stream_mode: The stream mode(s) to use.
+            stream_subgraphs: Whether to stream output from subgraphs.
+            stream_resumable: Whether to persist the stream chunks in order to resume the stream later.
+            durability: Durability level for the run. Must be one of 'sync', 'async', or 'exit'.
+                "async" means checkpoints are persisted async while next graph step executes, replaces checkpoint_during=True
+                "sync" means checkpoints are persisted sync after graph step executes, replaces checkpoint_during=False
+                "exit" means checkpoints are only persisted when the run exits, does not save intermediate steps
             headers: Optional custom headers to include with the request.
 
         Returns:
@@ -201,6 +237,13 @@ class SyncCronClient:
             ```
 
         """
+        if checkpoint_during is not None:
+            warnings.warn(
+                "`checkpoint_during` is deprecated and will be removed in a future version. Use `durability` instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
         payload = {
             "schedule": schedule,
             "input": input,
@@ -216,6 +259,10 @@ class SyncCronClient:
             "multitask_strategy": multitask_strategy,
             "end_time": end_time.isoformat() if end_time else None,
             "enabled": enabled,
+            "stream_mode": stream_mode,
+            "stream_subgraphs": stream_subgraphs,
+            "stream_resumable": stream_resumable,
+            "durability": durability,
         }
         payload = {k: v for k, v in payload.items() if v is not None}
         return self.http.post(
@@ -266,6 +313,10 @@ class SyncCronClient:
         interrupt_after: All | list[str] | None = None,
         on_run_completed: OnCompletionBehavior | None = None,
         enabled: bool | None = None,
+        stream_mode: StreamMode | Sequence[StreamMode] | None = None,
+        stream_subgraphs: bool | None = None,
+        stream_resumable: bool | None = None,
+        durability: Durability | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
     ) -> Cron:
@@ -288,6 +339,10 @@ class SyncCronClient:
                 after execution. 'keep' creates a new thread for each execution but does not
                 clean them up.
             enabled: Enable or disable the cron job.
+            stream_mode: The stream mode(s) to use.
+            stream_subgraphs: Whether to stream output from subgraphs.
+            stream_resumable: Whether to persist the stream chunks in order to resume the stream later.
+            durability: Durability level for the run. Must be one of 'sync', 'async', or 'exit'.
             headers: Optional custom headers to include with the request.
             params: Optional query parameters to include with the request.
 
@@ -318,6 +373,10 @@ class SyncCronClient:
             "interrupt_after": interrupt_after,
             "on_run_completed": on_run_completed,
             "enabled": enabled,
+            "stream_mode": stream_mode,
+            "stream_subgraphs": stream_subgraphs,
+            "stream_resumable": stream_resumable,
+            "durability": durability,
         }
         payload = {k: v for k, v in payload.items() if v is not None}
         return self.http.patch(

libs/sdk-py/langgraph_sdk/_sync/runs.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import builtins
 import warnings
 from collections.abc import Callable, Iterator, Mapping, Sequence
 from typing import Any, overload
@@ -503,11 +504,11 @@ class SyncRunsClient:
 
     def create_batch(
         self,
-        payloads: list[RunCreate],
+        payloads: builtins.list[RunCreate],
         *,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
-    ) -> list[Run]:
+    ) -> builtins.list[Run]:
         """Create a batch of stateless background runs."""
 
         def filter_payload(payload: RunCreate):
@@ -543,7 +544,7 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-    ) -> list[dict] | dict[str, Any]: ...
+    ) -> builtins.list[dict] | dict[str, Any]: ...
 
     @overload
     def wait(
@@ -568,7 +569,7 @@ class SyncRunsClient:
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
-    ) -> list[dict] | dict[str, Any]: ...
+    ) -> builtins.list[dict] | dict[str, Any]: ...
 
     def wait(
         self,
@@ -596,7 +597,7 @@ class SyncRunsClient:
         params: QueryParamTypes | None = None,
         on_run_created: Callable[[RunCreateMetadata], None] | None = None,
         durability: Durability | None = None,
-    ) -> list[dict] | dict[str, Any]:
+    ) -> builtins.list[dict] | dict[str, Any]:
         """Create a run, wait until it finishes and return the final state.
 
         Args:
@@ -740,10 +741,10 @@ class SyncRunsClient:
         limit: int = 10,
         offset: int = 0,
         status: RunStatus | None = None,
-        select: list[RunSelectField] | None = None,
+        select: builtins.list[RunSelectField] | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
-    ) -> list[Run]:
+    ) -> builtins.list[Run]:
         """List runs.
 
         Args:

libs/sdk-py/langgraph_sdk/_sync/threads.py

@@ -255,6 +255,7 @@ class SyncThreadsClient:
         sort_by: ThreadSortBy | None = None,
         sort_order: SortOrder | None = None,
         select: list[ThreadSelectField] | None = None,
+        extract: dict[str, str] | None = None,
         headers: Mapping[str, str] | None = None,
         params: QueryParamTypes | None = None,
     ) -> list[Thread]:
@@ -268,7 +269,17 @@ class SyncThreadsClient:
                 Must be one of 'idle', 'busy', 'interrupted' or 'error'.
             limit: Limit on number of threads to return.
             offset: Offset in threads table to start search from.
+            sort_by: Sort by field.
+            sort_order: Sort order.
+            select: List of fields to include in the response.
+            extract: Dictionary mapping aliases to JSONB paths to extract
+                from thread data. Paths use dot notation for nested keys and
+                bracket notation for array indices (e.g.,
+                `{"last_msg": "values.messages[-1]"}`). Extracted values are
+                returned in an `extracted` field on each thread. Maximum 10
+                paths per request.
             headers: Optional custom headers to include with the request.
+            params: Optional query parameters to include with the request.
 
         Returns:
             List of the threads matching the search parameters.
@@ -303,6 +314,8 @@ class SyncThreadsClient:
             payload["sort_order"] = sort_order
         if select:
             payload["select"] = select
+        if extract:
+            payload["extract"] = extract
         return self.http.post(
             "/threads/search", json=payload, headers=headers, params=params
         )
@@ -530,7 +543,7 @@ class SyncThreadsClient:
         elif checkpoint_id:
             get_params = {"subgraphs": subgraphs}
             if params:
-                get_params = {**get_params, **params}
+                get_params = {**get_params, **dict(params)}
             return self.http.get(
                 f"/threads/{thread_id}/state/{checkpoint_id}",
                 params=get_params,
@@ -539,7 +552,7 @@ class SyncThreadsClient:
         else:
             get_params = {"subgraphs": subgraphs}
             if params:
-                get_params = {**get_params, **params}
+                get_params = {**get_params, **dict(params)}
             return self.http.get(
                 f"/threads/{thread_id}/state",
                 params=get_params,

libs/sdk-py/langgraph_sdk/auth/__init__.py

@@ -46,34 +46,51 @@ class Auth:
 
         my_auth = Auth()
 
-        async def verify_token(token: str) -> str:
-            # Verify token and return user_id
-            # This would typically be a call to your auth server
-            return "user_id"
-
-        @auth.authenticate
-        async def authenticate(authorization: str) -> str:
-            # Verify token and return user_id
-            result = await verify_token(authorization)
-            if result != "user_id":
+        @my_auth.authenticate
+        async def authenticate(authorization: str) -> Auth.types.MinimalUserDict:
+            user = await verify_token(authorization)  # Your token verification logic
+            if not user:
                 raise Auth.exceptions.HTTPException(
                     status_code=401, detail="Unauthorized"
                 )
-            return result
+            return {
+                "identity": user["id"],
+                "permissions": user.get("permissions", []),
+            }
 
-        # Global fallback handler
-        @auth.on
-        async def authorize_default(params: Auth.on.value):
-            return False # Reject all requests (default behavior)
+        # Default deny: reject all requests that don't have a specific handler
+        @my_auth.on
+        async def deny_all(ctx: Auth.types.AuthContext, value: Any) -> False:
+            return False
 
-        @auth.on.threads.create
-        async def authorize_thread_create(params: Auth.on.threads.create.value):
-            # Allow the allowed user to create a thread
-            assert params.get("metadata", {}).get("owner") == "allowed_user"
+        # Allow users to create threads with their own identity as owner
+        @my_auth.on.threads.create
+        async def allow_thread_create(
+            ctx: Auth.types.AuthContext, value: Auth.types.on.threads.create.value
+        ):
+            metadata = value.setdefault("metadata", {})
+            metadata["owner"] = ctx.user.identity
 
-        @auth.on.store
-        async def authorize_store(ctx: Auth.types.AuthContext, value: Auth.types.on):
-            assert ctx.user.identity in value["namespace"], "Not authorized"
+        # Allow users to read and search their own threads
+        @my_auth.on.threads.read
+        async def allow_thread_read(
+            ctx: Auth.types.AuthContext, value: Auth.types.on.threads.read.value
+        ) -> Auth.types.FilterType:
+            return {"owner": ctx.user.identity}
+
+        @my_auth.on.threads.search
+        async def allow_thread_search(
+            ctx: Auth.types.AuthContext, value: Auth.types.on.threads.search.value
+        ) -> Auth.types.FilterType:
+            return {"owner": ctx.user.identity}
+
+        # Scope all store operations to the user's namespace
+        @my_auth.on.store
+        async def scope_store(ctx: Auth.types.AuthContext, value: Auth.types.on.store.value):
+            namespace = tuple(value["namespace"]) if value.get("namespace") else ()
+            if not namespace or namespace[0] != ctx.user.identity:
+                namespace = (ctx.user.identity, *namespace)
+            value["namespace"] = namespace
         ```
 
     ???+ note "Request Processing Flow"
@@ -132,30 +149,31 @@ class Auth:
         
         ???+ example "Examples"
 
-            Global handler for all requests:
+            Start by denying all requests by default, then add specific handlers
+            to allow access:
 
             ```python
+            # Default deny: reject all unhandled requests
             @auth.on
-            async def reject_unhandled_requests(ctx: AuthContext, value: Any) -> None:
-                print(f"Request to {ctx.path} by {ctx.user.identity}")
+            async def deny_all(ctx: AuthContext, value: Any) -> False:
                 return False
             ```
 
-            Resource-specific handler. This would take precedence over the global handler
+            Resource-specific handler. This takes precedence over the global handler
             for all actions on the `threads` resource:
-            
+
             ```python
             @auth.on.threads
-            async def check_thread_access(ctx: AuthContext, value: Any) -> bool:
-                # Allow access only to threads created by the user
-                return value.get("created_by") == ctx.user.identity
+            async def allow_thread_access(ctx: AuthContext, value: Any) -> Auth.types.FilterType:
+                # Only allow access to threads owned by the user
+                return {"owner": ctx.user.identity}
             ```
 
             Resource and action specific handler:
 
             ```python
             @auth.on.threads.delete
-            async def prevent_thread_deletion(ctx: AuthContext, value: Any) -> bool:
+            async def allow_admin_thread_deletion(ctx: AuthContext, value: Any) -> bool:
                 # Only admins can delete threads
                 return "admin" in ctx.user.permissions
             ```
@@ -163,20 +181,38 @@ class Auth:
             Multiple resources or actions:
 
             ```python
-            @auth.on(resources=["threads", "runs"], actions=["create", "update"])
-            async def rate_limit_writes(ctx: AuthContext, value: Any) -> bool:
-                # Implement rate limiting for write operations
-                return await check_rate_limit(ctx.user.identity)
+            @auth.on(resources=["threads", "assistants"], actions=["read", "search"])
+            async def allow_reads(ctx: AuthContext, value: Any) -> Auth.types.FilterType:
+                # Allow read/search access to resources owned by the user
+                return {"owner": ctx.user.identity}
             ```
 
             Auth for the `store` resource is a bit different since its structure is developer defined.
-            You typically want to enforce user creds in the namespace.
+            You typically want to scope store operations by rewriting the namespace to include the user's identity.
+            The `value` dict is mutable — changes to `value["namespace"]` are used by the server for the actual operation.
 
             ```python
             @auth.on.store
-            async def check_store_access(ctx: AuthContext, value: Auth.types.on) -> bool:
-                # Assuming you structure your store like (store.aput((user_id, application_context), key, value))
-                assert value["namespace"][0] == ctx.user.identity
+            async def scope_store(ctx: AuthContext, value: Auth.types.on.store.value):
+                # Allow store access but scope to user's namespace
+                namespace = tuple(value["namespace"]) if value.get("namespace") else ()
+                if not namespace or namespace[0] != ctx.user.identity:
+                    namespace = (ctx.user.identity, *namespace)
+                value["namespace"] = namespace
+            ```
+
+            You can also register handlers for specific store actions:
+
+            ```python
+            @auth.on.store.put
+            async def allow_put(ctx: AuthContext, value: Auth.types.on.store.put.value):
+                # Allow puts, scoped to user's namespace
+                value["namespace"] = (ctx.user.identity, *value["namespace"])
+
+            @auth.on.store.get
+            async def allow_get(ctx: AuthContext, value: Auth.types.on.store.get.value):
+                # Allow gets, scoped to user's namespace
+                value["namespace"] = (ctx.user.identity, *value["namespace"])
             ```
         """
         # These are accessed by the API. Changes to their names or types is
@@ -483,9 +519,100 @@ class _CronsOn(
     Search = types.CronsSearch
 
 
+class _StoreActionOn(typing.Generic[T]):
+    """Decorator for registering a handler for a specific store action."""
+
+    def __init__(
+        self,
+        auth: Auth,
+        action: typing.Literal["put", "get", "search", "delete", "list_namespaces"],
+        value: type[T],
+    ) -> None:
+        self.auth = auth
+        self.action = action
+        self.value = value
+
+    def __call__(self, fn: _ActionHandler[T]) -> _ActionHandler[T]:
+        _validate_handler(fn)
+        _register_handler(self.auth, "store", self.action, fn)
+        return fn
+
+
 class _StoreOn:
     def __init__(self, auth: Auth) -> None:
         self._auth = auth
+        self.put = _StoreActionOn(auth, "put", types.StorePut)
+        """Register a handler for store put operations.
+
+        ???+ example "Example"
+            If using `@auth.on` to deny by default, register this handler to allow
+            put operations (scoped to the user's namespace):
+
+            ```python
+            @auth.on.store.put
+            async def allow_store_put(ctx: Auth.types.AuthContext, value: Auth.types.on.store.put.value):
+                # Allow puts, scoped to user's namespace
+                value["namespace"] = (ctx.user.identity, *value["namespace"])
+            ```
+        """
+        self.get = _StoreActionOn(auth, "get", types.StoreGet)
+        """Register a handler for store get operations.
+
+        ???+ example "Example"
+            If using `@auth.on` to deny by default, register this handler to allow
+            get operations (scoped to the user's namespace):
+
+            ```python
+            @auth.on.store.get
+            async def allow_store_get(ctx: Auth.types.AuthContext, value: Auth.types.on.store.get.value):
+                # Allow gets, scoped to user's namespace
+                value["namespace"] = (ctx.user.identity, *value["namespace"])
+            ```
+        """
+        self.search = _StoreActionOn(auth, "search", types.StoreSearch)
+        """Register a handler for store search operations.
+
+        ???+ example "Example"
+            If using `@auth.on` to deny by default, register this handler to allow
+            search operations (scoped to the user's namespace):
+
+            ```python
+            @auth.on.store.search
+            async def allow_store_search(ctx: Auth.types.AuthContext, value: Auth.types.on.store.search.value):
+                # Allow searches, scoped to user's namespace
+                value["namespace"] = (ctx.user.identity, *value["namespace"])
+            ```
+        """
+        self.delete = _StoreActionOn(auth, "delete", types.StoreDelete)
+        """Register a handler for store delete operations.
+
+        ???+ example "Example"
+            If using `@auth.on` to deny by default, register this handler to allow
+            delete operations (scoped to the user's namespace):
+
+            ```python
+            @auth.on.store.delete
+            async def allow_store_delete(ctx: Auth.types.AuthContext, value: Auth.types.on.store.delete.value):
+                # Allow deletes, scoped to user's namespace
+                value["namespace"] = (ctx.user.identity, *value["namespace"])
+            ```
+        """
+        self.list_namespaces = _StoreActionOn(
+            auth, "list_namespaces", types.StoreListNamespaces
+        )
+        """Register a handler for store list_namespaces operations.
+
+        ???+ example "Example"
+            If using `@auth.on` to deny by default, register this handler to allow
+            namespace listing (scoped to the user's prefix):
+
+            ```python
+            @auth.on.store.list_namespaces
+            async def allow_list_ns(ctx: Auth.types.AuthContext, value: Auth.types.on.store.list_namespaces.value):
+                # Allow listing, scoped to user's namespace prefix
+                value["namespace"] = (ctx.user.identity,)
+            ```
+        """
 
     @typing.overload
     def __call__(
@@ -572,40 +699,42 @@ class _On:
 
     ???+ example "Examples"
 
-        Global handler for all requests:
+        Start by denying all requests by default with a global handler,
+        then add specific handlers to allow access:
 
         ```python
+        # Default deny: reject all requests without a specific handler
         @auth.on
-        async def log_all_requests(ctx: AuthContext, value: Any) -> None:
-            print(f"Request to {ctx.path} by {ctx.user.identity}")
-            return True
+        async def deny_all(ctx: AuthContext, value: Any) -> False:
+            return False
         ```
 
-        Resource-specific handler:
+        Resource-specific handler to allow access (takes precedence
+        over the global deny handler):
 
         ```python
         @auth.on.threads
-        async def check_thread_access(ctx: AuthContext, value: Any) -> bool:
-            # Allow access only to threads created by the user
-            return value.get("created_by") == ctx.user.identity
+        async def allow_thread_access(ctx: AuthContext, value: Any) -> Auth.types.FilterType:
+            # Allow access only to threads owned by the user
+            return {"owner": ctx.user.identity}
         ```
 
         Resource and action specific handler:
 
         ```python
-        @auth.on.threads.delete
-        async def prevent_thread_deletion(ctx: AuthContext, value: Any) -> bool:
-            # Only admins can delete threads
-            return "admin" in ctx.user.permissions
+        @auth.on.threads.create
+        async def allow_thread_create(ctx: AuthContext, value: Any) -> None:
+            # Allow thread creation, stamping the owner
+            value.setdefault("metadata", {})["owner"] = ctx.user.identity
         ```
 
         Multiple resources or actions:
 
         ```python
-        @auth.on(resources=["threads", "runs"], actions=["create", "update"])
-        async def rate_limit_writes(ctx: AuthContext, value: Any) -> bool:
-            # Implement rate limiting for write operations
-            return await check_rate_limit(ctx.user.identity)
+        @auth.on(resources=["threads", "assistants"], actions=["read", "search"])
+        async def allow_reads(ctx: AuthContext, value: Any) -> Auth.types.FilterType:
+            # Allow read/search, scoped to user's resources
+            return {"owner": ctx.user.identity}
         ```
     """
 

libs/sdk-py/langgraph_sdk/auth/types.py

@@ -233,13 +233,20 @@ class StudioUser:
 
     ???+ example "Examples"
 
+        Use `@auth.on` to deny by default, but allow Studio users through:
+
         ```python
         @auth.on
-        async def allow_developers(ctx: Auth.types.AuthContext, value: Any) -> None:
+        async def deny_all_except_studio(ctx: Auth.types.AuthContext, value: Any) -> bool:
+            # Allow Studio users, deny everyone else by default
             if isinstance(ctx.user, Auth.types.StudioUser):
-                return None
-            ...
+                return True
             return False
+
+        # Then add specific handlers to allow access for non-Studio users
+        @auth.on.threads
+        async def allow_thread_access(ctx: Auth.types.AuthContext, value: Any) -> Auth.types.FilterType:
+            return {"owner": ctx.user.identity}
         ```
     """
 
@@ -402,7 +409,7 @@ class AuthContext(BaseAuthContext):
         "list_namespaces",
     ]
     """The action being performed on the resource.
-    
+
     Most resources support the following actions:
     - create: Create a new resource
     - read: Read information about a resource
@@ -411,8 +418,10 @@ class AuthContext(BaseAuthContext):
     - search: Search for resources
 
     The store supports the following actions:
-    - put: Add or update a document in the store
-    - get: Get a document from the store
+    - put: Add or update an item in the store
+    - get: Get an item from the store
+    - search: Search for items within a namespace prefix
+    - delete: Delete an item from the store
     - list_namespaces: List the namespaces in the store
     """
 
@@ -851,20 +860,34 @@ class CronsSearch(typing.TypedDict, total=False):
 
 
 class StoreGet(typing.TypedDict):
-    """Operation to retrieve a specific item by its namespace and key."""
+    """Operation to retrieve a specific item by its namespace and key.
+
+    This dict is mutable — auth handlers can modify `namespace` to enforce
+    access scoping (e.g., prepending the user's identity).
+    """
 
     namespace: tuple[str, ...]
-    """Hierarchical path that uniquely identifies the item's location."""
+    """Hierarchical path that uniquely identifies the item's location.
+
+    Auth handlers can modify this to enforce per-user scoping.
+    """
 
     key: str
     """Unique identifier for the item within its specific namespace."""
 
 
 class StoreSearch(typing.TypedDict):
-    """Operation to search for items within a specified namespace hierarchy."""
+    """Operation to search for items within a specified namespace hierarchy.
+
+    This dict is mutable — auth handlers can modify `namespace` to enforce
+    access scoping (e.g., prepending the user's identity).
+    """
 
     namespace: tuple[str, ...]
-    """Prefix filter for defining the search scope."""
+    """Prefix filter for defining the search scope.
+
+    Auth handlers can modify this to enforce per-user scoping.
+    """
 
     filter: dict[str, typing.Any] | None
     """Key-value pairs for filtering results based on exact matches or comparison operators."""
@@ -876,14 +899,22 @@ class StoreSearch(typing.TypedDict):
     """Number of matching items to skip for pagination."""
 
     query: str | None
-    """Naturalj language search query for semantic search capabilities."""
+    """Natural language search query for semantic search capabilities."""
 
 
 class StoreListNamespaces(typing.TypedDict):
-    """Operation to list and filter namespaces in the store."""
+    """Operation to list and filter namespaces in the store.
+
+    This dict is mutable — auth handlers can modify `namespace` (the prefix)
+    to enforce access scoping (e.g., prepending the user's identity).
+    """
 
     namespace: tuple[str, ...] | None
-    """Prefix filter namespaces."""
+    """Prefix filter for namespaces. Can be `None` if no prefix was provided.
+
+    Auth handlers can modify this to enforce per-user scoping. When `None`,
+    handlers should set it to `(user_id,)` to scope listing to the user's namespaces.
+    """
 
     suffix: tuple[str, ...] | None
     """Optional conditions for filtering namespaces."""
@@ -903,10 +934,17 @@ class StoreListNamespaces(typing.TypedDict):
 
 
 class StorePut(typing.TypedDict):
-    """Operation to store, update, or delete an item in the store."""
+    """Operation to store, update, or delete an item in the store.
+
+    This dict is mutable — auth handlers can modify `namespace` to enforce
+    access scoping (e.g., prepending the user's identity).
+    """
 
     namespace: tuple[str, ...]
-    """Hierarchical path that identifies the location of the item."""
+    """Hierarchical path that identifies the location of the item.
+
+    Auth handlers can modify this to enforce per-user scoping.
+    """
 
     key: str
     """Unique identifier for the item within its namespace."""
@@ -919,10 +957,17 @@ class StorePut(typing.TypedDict):
 
 
 class StoreDelete(typing.TypedDict):
-    """Operation to delete an item from the store."""
+    """Operation to delete an item from the store.
+
+    This dict is mutable — auth handlers can modify `namespace` to enforce
+    access scoping (e.g., prepending the user's identity).
+    """
 
     namespace: tuple[str, ...]
-    """Hierarchical path that uniquely identifies the item's location."""
+    """Hierarchical path that uniquely identifies the item's location.
+
+    Auth handlers can modify this to enforce per-user scoping.
+    """
 
     key: str
     """Unique identifier for the item within its specific namespace."""
@@ -935,24 +980,27 @@ class on:
     and search operations across different resources (threads, assistants, crons).
 
     ???+ note "Usage"
+        Start by denying all requests by default, then add handlers to allow access:
+
         ```python
         from langgraph_sdk import Auth
 
         auth = Auth()
 
+        # Default deny: reject all requests without a specific handler
         @auth.on
-        def handle_all(params: Auth.on.value):
-            raise Exception("Not authorized")
+        async def deny_all(ctx: Auth.types.AuthContext, value: Auth.on.value):
+            return False
 
+        # Allow thread creation, stamping the owner
         @auth.on.threads.create
-        def handle_thread_create(params: Auth.on.threads.create.value):
-            # Handle thread creation
-            pass
+        async def allow_thread_create(ctx: Auth.types.AuthContext, value: Auth.on.threads.create.value):
+            value.setdefault("metadata", {})["owner"] = ctx.user.identity
 
+        # Allow assistant search, scoped to user's resources
         @auth.on.assistants.search
-        def handle_assistant_search(params: Auth.on.assistants.search.value):
-            # Handle assistant search
-            pass
+        async def allow_assistant_search(ctx: Auth.types.AuthContext, value: Auth.on.assistants.search.value):
+            return {"owner": ctx.user.identity}
         ```
     """
 

libs/sdk-py/langgraph_sdk/schema.py

@@ -15,7 +15,7 @@ from typing import (
     Union,
 )
 
-from typing_extensions import TypedDict
+from typing_extensions import NotRequired, TypedDict
 
 Json = dict[str, Any] | None
 """Represents a JSON-like structure, which can be None or a dictionary with string keys and any values."""
@@ -146,7 +146,9 @@ AssistantSortBy = Literal[
 The field to sort by.
 """
 
-ThreadSortBy = Literal["thread_id", "status", "created_at", "updated_at"]
+ThreadSortBy = Literal[
+    "thread_id", "status", "created_at", "updated_at", "state_updated_at"
+]
 """
 The field to sort by.
 """
@@ -302,6 +304,8 @@ class Thread(TypedDict):
     """The current state of the thread."""
     interrupts: dict[str, list[Interrupt]]
     """Mapping of task ids to interrupts that were raised in that task."""
+    extracted: NotRequired[dict[str, Any]]
+    """Extracted values from thread data. Only present when `extract` is used in search."""
 
 
 class ThreadTask(TypedDict):
@@ -422,6 +426,14 @@ class CronUpdate(TypedDict, total=False):
     """What to do with the thread after the run completes."""
     enabled: bool
     """Enable or disable the cron job."""
+    stream_mode: StreamMode | list[StreamMode]
+    """The stream mode(s) to use."""
+    stream_subgraphs: bool
+    """Whether to stream output from subgraphs."""
+    stream_resumable: bool
+    """Whether to persist the stream chunks in order to resume the stream later."""
+    durability: Durability
+    """Durability level for the run. Must be one of 'sync', 'async', or 'exit'."""
 
 
 # Select field aliases for client-side typing of `select` parameters.

libs/sdk-py/tests/test_client_stream.py

@@ -19,7 +19,7 @@ class AsyncListByteStream(httpx.AsyncByteStream):
         self._chunks = list(chunks)
         self._exc = exc
 
-    async def __aiter__(self):  # type: ignore[override]
+    async def __aiter__(self):
         for chunk in self._chunks:
             yield chunk
         if self._exc is not None:
@@ -34,7 +34,7 @@ class ListByteStream(httpx.ByteStream):
         self._chunks = list(chunks)
         self._exc = exc
 
-    def __iter__(self):  # type: ignore[override]
+    def __iter__(self):
         yield from self._chunks
         if self._exc is not None:
             raise self._exc

libs/sdk-py/tests/test_errors.py

@@ -65,7 +65,7 @@ def test_raise_for_status_typed_maps_exceptions_and_sets_status_code(
     with pytest.raises(exc_type) as ei:
         _raise_for_status_typed(r)
 
-    err = cast("APIStatusError", ei.value)
+    err = ei.value
     assert err.status_code == status
     # response attribute should be present and match
     assert err.response.status_code == status
@@ -113,7 +113,7 @@ def test_error_message_in_str_and_args() -> None:
     r = make_response(422, json_body={"message": "Validation failed"})
     with pytest.raises(UnprocessableEntityError) as ei:
         _raise_for_status_typed(r)
-    err = cast("UnprocessableEntityError", ei.value)
+    err = ei.value
     assert str(err) == "Validation failed"
     assert err.args == ("Validation failed",)
     assert err.message == "Validation failed"

libs/sdk-py/uv.lock

@@ -265,7 +265,7 @@ wheels = [
 
 [[package]]
 name = "langgraph"
-version = "1.0.8"
+version = "1.0.10"
 source = { editable = "../langgraph" }
 dependencies = [
     { name = "langchain-core" },
@@ -349,7 +349,7 @@ test = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.0.0"
+version = "4.0.1"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
@@ -370,6 +370,7 @@ dev = [
     { name = "numpy" },
     { name = "pandas" },
     { name = "pandas-stubs", specifier = ">=2.2.2.240807" },
+    { name = "pycryptodome", specifier = ">=3.23.0" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -396,7 +397,7 @@ test = [
 
 [[package]]
 name = "langgraph-prebuilt"
-version = "1.0.7"
+version = "1.0.8"
 source = { editable = "../prebuilt" }
 dependencies = [
     { name = "langchain-core" },