release(cli): 0.4.28

Bumping the CLI to 0.4.28 to release the ADK/library usage tracking
added in #7939 (a9b0a05).

.github/actions/uv_setup/action.yml

@@ -24,7 +24,7 @@ runs:
   using: composite
   steps:
     - name: Install uv and set the python version
-      uses: astral-sh/setup-uv@37802adc94f370d6bfd71619e3f0bf239e1f3b78 # v7.6.0
+      uses: astral-sh/setup-uv@v7
       with:
         python-version: ${{ inputs.python-version }}
         enable-cache: ${{ inputs.enable-cache }}

.github/workflows/_integration_test.yml

@@ -37,7 +37,7 @@ jobs:
       run:
         working-directory: libs/cli
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       - name: Get changed files
         id: changed-files
         if: github.event_name != 'workflow_dispatch'
@@ -126,8 +126,8 @@ jobs:
             exit 1
           fi
           LANGCHAIN_ANTHROPIC_VERSION=$(docker run --rm --entrypoint "" langgraph-test-h python -c "import sys; from importlib.metadata import version; v = version('langchain-anthropic'); print(v);")
-          if [ "$LANGCHAIN_ANTHROPIC_VERSION" != "1.4.6" ]; then
-            echo "LANGCHAIN_ANTHROPIC_VERSION != 1.4.6; $LANGCHAIN_ANTHROPIC_VERSION"
+          if [ "$LANGCHAIN_ANTHROPIC_VERSION" != "1.0.0a5" ]; then
+            echo "LANGCHAIN_ANTHROPIC_VERSION != 1.0.0a5; $LANGCHAIN_ANTHROPIC_VERSION"
             exit 1
           fi
 

.github/workflows/_lint.yml

@@ -31,7 +31,7 @@ jobs:
           - "3.12"
     name: "lint #${{ matrix.python-version }}"
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       - name: Get changed files
         id: changed-files
         if: github.event_name != 'workflow_dispatch'

.github/workflows/_sdk_integration_test.yml

@@ -23,7 +23,7 @@ jobs:
     env:
       HAS_LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY != '' }}
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: ./.github/actions/uv_setup
@@ -33,7 +33,7 @@ jobs:
           working-directory: libs/sdk-py
 
       - name: Login to Docker Hub
-        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4
         if: ${{ !github.event.pull_request.head.repo.fork }}
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}

.github/workflows/_test.yml

@@ -25,7 +25,7 @@ jobs:
 
     name: "test #${{ matrix.python-version }}"
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: ./.github/actions/uv_setup
         with:
@@ -33,7 +33,7 @@ jobs:
           cache-suffix: test-${{ inputs.working-directory }}
           working-directory: ${{ inputs.working-directory }}
       - name: Login to Docker Hub
-        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4
         if: ${{ !github.event.pull_request.head.repo.fork }}
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}

.github/workflows/_test_langgraph.yml

@@ -23,7 +23,7 @@ jobs:
         working-directory: libs/langgraph
     name: "test #${{ matrix.python-version }}"
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: ./.github/actions/uv_setup
         with:
@@ -31,7 +31,7 @@ jobs:
           cache-suffix: "test-langgraph"
           working-directory: libs/langgraph
       - name: Login to Docker Hub
-        uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4
         if: ${{ !github.event.pull_request.head.repo.fork }}
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}

.github/workflows/_test_release.yml

@@ -23,7 +23,7 @@ jobs:
       version: ${{ steps.check-version.outputs.version }}
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
 
       - name: Set up Python ${{ env.PYTHON_VERSION }}
         uses: ./.github/actions/uv_setup
@@ -48,7 +48,7 @@ jobs:
         working-directory: ${{ inputs.working-directory }}
 
       - name: Upload build
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        uses: actions/upload-artifact@v7
         with:
           name: test-dist
           path: ${{ inputs.working-directory }}/dist/
@@ -74,15 +74,15 @@ jobs:
       id-token: write
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
 
-      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+      - uses: actions/download-artifact@v8
         with:
           name: test-dist
           path: ${{ inputs.working-directory }}/dist/
 
       - name: Publish to test PyPI
-        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # release/v1
+        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
         with:
           packages-dir: ${{ inputs.working-directory }}/dist/
           verbose: true

.github/workflows/baseline.yml

@@ -17,7 +17,7 @@ jobs:
       run:
         working-directory: libs/langgraph
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       - run: SHA=$(git rev-parse HEAD) && echo "SHA=$SHA" >> $GITHUB_ENV
       - name: Set up Python 3.11
         uses: ./.github/actions/uv_setup
@@ -30,7 +30,7 @@ jobs:
       - name: Run benchmarks
         run: OUTPUT=out/benchmark-baseline.json make -s benchmark
       - name: Save outputs
-        uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        uses: actions/cache/save@v5
         with:
           key: ${{ runner.os }}-benchmark-baseline-${{ env.SHA }}
           path: |

.github/workflows/bench.yml

@@ -15,7 +15,7 @@ jobs:
       run:
         working-directory: libs/langgraph
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       - id: files
         name: Get changed files
         uses: Ana06/get-changed-files@25f79e676e7ea1868813e21465014798211fad8c # v2.3.0
@@ -30,7 +30,7 @@ jobs:
       - name: Install dependencies
         run: uv sync --group test
       - name: Download baseline
-        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        uses: actions/cache/restore@v5
         with:
           key: ${{ runner.os }}-benchmark-baseline
           restore-keys: |
@@ -57,7 +57,7 @@ jobs:
             echo EOF
           } >> "$GITHUB_OUTPUT"
       - name: Annotation
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         env:
           CHANGED_FILES: ${{ steps.files.outputs.added_modified_renamed }}
           BENCHMARK_OUTPUT: ${{ steps.benchmark.outputs.OUTPUT }}

.github/workflows/ci.yml

@@ -30,8 +30,8 @@ jobs:
       deps: ${{ steps.filter.outputs.deps || 'true' }}
       sdk_py: ${{ steps.filter.outputs.sdk_py || 'true' }}
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-      - uses: dorny/paths-filter@7b450fff21473bca461d4b92ce414b9d0420d706 # v4
+      - uses: actions/checkout@v6
+      - uses: dorny/paths-filter@fbd0ab8f3e69293af611ebaee6363fc25e6d187d # v4
         if: github.event_name != 'workflow_dispatch'
         id: filter
         with:
@@ -112,9 +112,9 @@ jobs:
     name: "Check SDK methods matching"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       - name: Set up Python
-        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        uses: actions/setup-python@v6
         with:
           python-version: "3.11"
       - name: Run check_sdk_methods script
@@ -130,7 +130,7 @@ jobs:
         python-version:
           - "3.13"
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: ./.github/actions/uv_setup
         with:

.github/workflows/deploy-redirects.yml

@@ -26,10 +26,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        uses: actions/checkout@v6
 
       - name: Setup Python
-        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        uses: actions/setup-python@v6
         with:
           python-version: '3.11'
 
@@ -37,13 +37,13 @@ jobs:
         run: python docs/generate_redirects.py
 
       - name: Setup Pages
-        uses: actions/configure-pages@45bfe0192ca1faeb007ade9deae92b16b8254a0d # v6.0.0
+        uses: actions/configure-pages@v6
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5.0.0
+        uses: actions/upload-pages-artifact@v5
         with:
           path: 'docs/_site'
 
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5.0.0
+        uses: actions/deploy-pages@v5

.github/workflows/release.yml

@@ -25,7 +25,7 @@ jobs:
       tag: ${{ steps.check-version.outputs.tag }}
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: ./.github/actions/uv_setup
@@ -51,7 +51,7 @@ jobs:
         working-directory: ${{ inputs.working-directory }}
 
       - name: Upload build
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        uses: actions/upload-artifact@v7
         with:
           name: dist
           path: ${{ inputs.working-directory }}/dist/
@@ -87,7 +87,7 @@ jobs:
     outputs:
       release-body: ${{ steps.generate-release-body.outputs.release-body }}
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
         with:
           repository: langchain-ai/langgraph
           path: langgraph
@@ -158,7 +158,7 @@ jobs:
       - test-pypi-publish
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
 
       # We explicitly *don't* set up caching here. This ensures our tests are
       # maximally sensitive to catching breakage.
@@ -262,7 +262,7 @@ jobs:
         working-directory: ${{ inputs.working-directory }}
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: ./.github/actions/uv_setup
@@ -272,13 +272,13 @@ jobs:
           enable-cache: false
           working-directory: ${{ inputs.working-directory }}
 
-      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+      - uses: actions/download-artifact@v8
         with:
           name: dist
           path: ${{ inputs.working-directory }}/dist/
 
       - name: Publish package distributions to PyPI
-        uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # release/v1
+        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
         with:
           packages-dir: ${{ inputs.working-directory }}/dist/
           verbose: true
@@ -304,7 +304,7 @@ jobs:
         working-directory: ${{ inputs.working-directory }}
 
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
 
       - name: Set up Python
         uses: ./.github/actions/uv_setup
@@ -314,7 +314,7 @@ jobs:
           enable-cache: false
           working-directory: ${{ inputs.working-directory }}
 
-      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+      - uses: actions/download-artifact@v8
         with:
           name: dist
           path: ${{ inputs.working-directory }}/dist/

.github/workflows/reopen_on_assignment.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Find and reopen matching PRs
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           script: |
             const { owner, repo } = context.repo;

.github/workflows/require_issue_link.yml

@@ -50,7 +50,7 @@ jobs:
     steps:
       - name: Check for issue link and assignee
         id: check-link
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           script: |
             const { owner, repo } = context.repo;
@@ -283,7 +283,7 @@ jobs:
         if: >-
           env.ENFORCE_ISSUE_LINK == 'true' &&
           (steps.check-link.outputs.has-link != 'true' || steps.check-link.outputs.is-assigned != 'true')
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           script: |
             const { owner, repo } = context.repo;
@@ -312,7 +312,7 @@ jobs:
         if: >-
           env.ENFORCE_ISSUE_LINK == 'true' &&
           steps.check-link.outputs.has-link == 'true' && steps.check-link.outputs.is-assigned == 'true'
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           script: |
             const { owner, repo } = context.repo;
@@ -366,7 +366,7 @@ jobs:
         if: >-
           env.ENFORCE_ISSUE_LINK == 'true' &&
           (steps.check-link.outputs.has-link != 'true' || steps.check-link.outputs.is-assigned != 'true')
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           script: |
             const { owner, repo } = context.repo;

.github/workflows/tag-external-issues.yml

@@ -55,7 +55,7 @@ jobs:
     steps:
       - name: Generate GitHub App token
         id: app-token
-        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
+        uses: actions/create-github-app-token@v3
         with:
           app-id: ${{ secrets.ORG_MEMBERSHIP_APP_ID }}
           private-key: ${{ secrets.ORG_MEMBERSHIP_APP_PRIVATE_KEY }}
@@ -63,7 +63,7 @@ jobs:
       - name: Check if contributor is external
         if: steps.app-token.outcome == 'success'
         id: check-membership
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           github-token: ${{ steps.app-token.outputs.token }}
           script: |
@@ -102,7 +102,7 @@ jobs:
 
       - name: Apply contributor tier label
         if: steps.check-membership.outputs.is-external == 'true'
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
@@ -155,7 +155,7 @@ jobs:
 
       - name: Add external label
         if: steps.check-membership.outputs.is-external == 'true'
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
@@ -168,7 +168,7 @@ jobs:
 
       - name: Add internal label
         if: steps.check-membership.outputs.is-external == 'false'
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
@@ -190,13 +190,13 @@ jobs:
     steps:
       - name: Generate GitHub App token
         id: app-token
-        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
+        uses: actions/create-github-app-token@v3
         with:
           app-id: ${{ secrets.ORG_MEMBERSHIP_APP_ID }}
           private-key: ${{ secrets.ORG_MEMBERSHIP_APP_PRIVATE_KEY }}
 
       - name: Backfill labels
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           github-token: ${{ steps.app-token.outputs.token }}
           script: |

.github/workflows/tag-external-prs.yml

@@ -40,7 +40,7 @@ jobs:
     steps:
       - name: Generate GitHub App token
         id: app-token
-        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
+        uses: actions/create-github-app-token@v3
         with:
           app-id: ${{ secrets.ORG_MEMBERSHIP_APP_ID }}
           private-key: ${{ secrets.ORG_MEMBERSHIP_APP_PRIVATE_KEY }}
@@ -48,7 +48,7 @@ jobs:
       - name: Check if contributor is external
         if: steps.app-token.outcome == 'success'
         id: check-membership
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           github-token: ${{ steps.app-token.outputs.token }}
           script: |
@@ -90,7 +90,7 @@ jobs:
       # event fires and triggers require_issue_link.yml.
       - name: Apply contributor tier label
         if: steps.check-membership.outputs.is-external == 'true'
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           # Use App token so the "labeled" event propagates to downstream
           # workflows (e.g. require_issue_link.yml).
@@ -145,7 +145,7 @@ jobs:
 
       - name: Add external label
         if: steps.check-membership.outputs.is-external == 'true'
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           # Use App token so the "labeled" event propagates to downstream
           # workflows (e.g. require_issue_link.yml). Events created by the
@@ -161,7 +161,7 @@ jobs:
 
       - name: Add internal label
         if: steps.check-membership.outputs.is-external == 'false'
-        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        uses: actions/github-script@v9
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |

.github/workflows/uv_lock_ugprade.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/checkout@v6
       
       - name: Set up uv
         uses: ./.github/actions/uv_setup

examples/README.md

@@ -1,11 +1,3 @@
 # LangGraph examples
 
-This directory is retained purely for archival purposes and is no longer updated.
-
-## 🤔 What is this?
-
-The examples previously found here have been moved to the consolidated LangChain documentation. This directory remains available for historical reference, but new examples and usage guidance are published in the docs.
-
-## 📖 Documentation
-
-For up-to-date LangGraph examples, tutorials, and guides, see the [LangGraph Docs](https://docs.langchain.com/oss/python/langgraph/overview). Get started with the [LangGraph Quickstart](https://docs.langchain.com/oss/python/langgraph/quickstart).
+This directory is retained purely for archival purposes and is no longer updated. The examples previously found here have been moved to the newly [consolidated LangChain documentation](https://docs.langchain.com/oss/python/langgraph/overview). Please refer to the LangChain docs for the most up-to-date examples and usage guidelines for LangGraph.

examples/delta-channel-dump/README.md

@@ -1,132 +0,0 @@
-# delta-channel-dump
-
-Recover messages (and other channels) from a Postgres-backed LangGraph thread
-written by **langgraph >= 1.2** (DeltaChannel format) — including **LangGraph
-Server / langgraph-api** deployments on the Postgres runtime, **deepagents
-0.6.x**, or any OSS app using `PostgresSaver` — before rolling back to an older
-runtime such as **deepagents 0.5.x / langgraph < 1.2**.
-
-langgraph-api uses the same `checkpoints` / `checkpoint_blobs` / `checkpoint_writes`
-schema as OSS `checkpoint-postgres`; this script reads those tables directly.
-
-On the older runtime, `add_messages` does not understand the `EXT_DELTA_SNAPSHOT`
-msgpack ext code and silently returns an empty list for affected channels. This
-tool reads the raw checkpoint blobs from Postgres and emits JSON you can inspect
-and re-apply via `update_state` (LangGraph Server SDK) or `graph.update_state`
-(OSS).
-
-## Install
-
-```bash
-pip install "psycopg[binary]" ormsgpack
-```
-
-## Run
-
-```bash
-export DATABASE_URI=postgres://user:pass@host:5432/dbname
-python3 dump.py \
-    --thread-id <uuid> \
-    --channel messages \
-    [--channel files ...] \
-    [--checkpoint-id <uuid>] \
-    [--checkpoint-ns ""] \
-    --output recovery.json
-```
-
-- `--thread-id` (required): thread UUID
-- `--channel` (required, repeatable): channel names to recover
-- `--checkpoint-id` (optional): target checkpoint; defaults to latest
-- `--checkpoint-ns` (optional): namespace; defaults to `""`
-- `--database-uri` (optional): Postgres URI; defaults to `DATABASE_URI` env var
-- `--output` (optional): output file; defaults to stdout
-
-## Output
-
-```json
-{
-  "thread_id": "...",
-  "checkpoint_ns": "",
-  "target_checkpoint_id": "...",
-  "parent_checkpoint_id": "...",
-  "channels": {
-    "messages": {
-      "delta_kind": "snapshot",
-      "seed_checkpoint_id": "...",
-      "seed_version": "...",
-      "seed": [{ "type": "ai", "content": "...", "id": "ai-0" }],
-      "writes": [
-        {
-          "checkpoint_id": "...",
-          "task_id": "...",
-          "idx": 0,
-          "value": [{ "type": "ai", "content": "...", "id": "ai-10" }]
-        }
-      ]
-    }
-  }
-}
-```
-
-`delta_kind` is one of:
-
-- `snapshot` — DeltaChannel snapshot blob (`channel_values[ch] == true`)
-- `legacy_plain` — pre-DeltaChannel inline or blob value
-- `no_seed` — walked to root without finding a populated ancestor
-
-`writes` are ordered oldest-to-newest (the order a reducer would replay them).
-
-## Reducing back to a single list
-
-For deepagents-style messages, combine seed and writes, then deduplicate:
-
-```python
-import json
-
-data = json.load(open("recovery.json"))
-ch = data["channels"]["messages"]
-messages = list(ch["seed"] or [])
-for w in ch["writes"]:
-    messages.extend(w["value"] or [])
-
-# Dedup by id, keep last; drop RemoveMessage tombstones
-by_id = {}
-for m in messages:
-    if isinstance(m, dict) and m.get("type") == "remove":
-        by_id.pop(m.get("id"), None)
-    elif isinstance(m, dict) and m.get("id"):
-        by_id[m["id"]] = m
-    else:
-        by_id[id(m)] = m
-reduced = list(by_id.values())
-```
-
-This approximates `_messages_delta_reducer` semantics; adjust for your graph.
-
-## Re-applying
-
-```python
-from langgraph_sdk import get_client
-
-client = get_client(url="http://localhost:8123")
-await client.threads.update_state(
-    thread_id,
-    values={"messages": reduced},
-)
-```
-
-Review the recovered JSON before calling `update_state`. This tool is
-read-only and intentionally does not mutate the database.
-
-## Scope / non-goals (v1)
-
-- **Postgres only** — OSS `PostgresSaver` or langgraph-api Postgres runtime; not
-  inmem, gRPC core, Mongo, or Redis checkpointer backends
-- **No AES decryption** (`LANGGRAPH_AES_KEY`) or custom encryption
-- **No reducer** — raw seed + writes only
-- **No automatic `update_state`** — operator applies manually
-
-## Copying
-
-`dump.py` is self-contained. Copy it anywhere; only `psycopg[binary]` and
-`ormsgpack` are required at runtime. No langgraph imports.

examples/delta-channel-dump/dump.py

@@ -1,469 +0,0 @@
-#!/usr/bin/env python3
-"""Recover delta-channel state from a Postgres-backed LangGraph thread.
-
-Works with OSS ``PostgresSaver`` and LangGraph Server / langgraph-api on the
-Postgres runtime (same checkpoint schema). Use after rolling back from
-langgraph >= 1.2 / deepagents 0.6.x to an older runtime that does not
-understand ``EXT_DELTA_SNAPSHOT`` msgpack blobs. The script walks the checkpoint
-parent chain, decodes msgpack blobs, and emits a JSON dump of per-channel
-``seed`` plus oldest-to-newest ``writes``. Apply the recovered values manually
-via ``client.threads.update_state(...)`` (Server) or ``graph.update_state``
-(OSS).
-
-Install::
-
-    pip install "psycopg[binary]" ormsgpack
-
-Run::
-
-    export DATABASE_URI=postgres://...
-    python3 dump.py --thread-id <uuid> --channel messages --output recovery.json
-
-Scope (v1): Postgres only; no AES/custom encryption; no reducer application.
-"""
-
-from __future__ import annotations
-
-import argparse
-import base64
-import json
-import os
-import sys
-import uuid
-from typing import Any
-
-import ormsgpack
-import psycopg
-
-# LangGraph msgpack EXT type codes (langgraph/checkpoint/serde/jsonplus.py).
-EXT_CONSTRUCTOR_SINGLE_ARG = 0
-EXT_CONSTRUCTOR_POS_ARGS = 1
-EXT_CONSTRUCTOR_KW_ARGS = 2
-EXT_METHOD_SINGLE_ARG = 3
-EXT_PYDANTIC_V1 = 4
-EXT_PYDANTIC_V2 = 5
-EXT_NUMPY_ARRAY = 6
-EXT_DELTA_SNAPSHOT = 7
-
-_MSGPACK_OPTION = ormsgpack.OPT_NON_STR_KEYS
-
-
-def ext_hook(code: int, data: bytes) -> Any:
-    """Decode LangGraph msgpack EXT payloads to JSON-friendly Python values."""
-    if code == EXT_DELTA_SNAPSHOT:
-        inner = ormsgpack.unpackb(data, ext_hook=ext_hook, option=_MSGPACK_OPTION)
-        return {"__delta_snapshot__": inner}
-    if code == EXT_CONSTRUCTOR_SINGLE_ARG:
-        try:
-            tup = ormsgpack.unpackb(data, ext_hook=ext_hook, option=_MSGPACK_OPTION)
-            if tup[0] == "uuid" and tup[1] == "UUID":
-                hex_ = tup[2]
-                return (
-                    f"{hex_[:8]}-{hex_[8:12]}-{hex_[12:16]}-"
-                    f"{hex_[16:20]}-{hex_[20:]}"
-                )
-            return tup[2]
-        except Exception:
-            return None
-    if code == EXT_CONSTRUCTOR_POS_ARGS:
-        try:
-            tup = ormsgpack.unpackb(data, ext_hook=ext_hook, option=_MSGPACK_OPTION)
-            if tup[0] == "langgraph.types" and tup[1] == "Send":
-                args = tup[2]
-                if len(args) == 2:
-                    return {"__send__": {"node": args[0], "arg": args[1]}}
-                return {
-                    "__send__": {
-                        "node": args[0],
-                        "arg": args[1],
-                        "timeout": args[2],
-                    }
-                }
-            return tup[2]
-        except Exception:
-            return None
-    if code in (EXT_CONSTRUCTOR_KW_ARGS, EXT_METHOD_SINGLE_ARG):
-        try:
-            tup = ormsgpack.unpackb(data, ext_hook=ext_hook, option=_MSGPACK_OPTION)
-            return tup[2]
-        except Exception:
-            return None
-    if code in (EXT_PYDANTIC_V1, EXT_PYDANTIC_V2):
-        try:
-            tup = ormsgpack.unpackb(data, ext_hook=ext_hook, option=_MSGPACK_OPTION)
-            return tup[2]
-        except Exception:
-            return None
-    if code == EXT_NUMPY_ARRAY:
-        try:
-            dtype_str, shape, order, buf = ormsgpack.unpackb(
-                data, ext_hook=ext_hook, option=_MSGPACK_OPTION
-            )
-            return {
-                "__numpy_array__": {
-                    "dtype": dtype_str,
-                    "shape": shape,
-                    "order": order,
-                    "data_b64": base64.b64encode(buf).decode("ascii"),
-                }
-            }
-        except Exception:
-            return None
-    return None
-
-
-def decode_blob(blob_type: str, blob_bytes: bytes | None) -> Any:
-    if blob_type in ("empty", "null") or blob_bytes is None:
-        return None
-    if blob_type == "msgpack":
-        return ormsgpack.unpackb(
-            blob_bytes, ext_hook=ext_hook, option=_MSGPACK_OPTION
-        )
-    if blob_type in ("bytes", "bytearray"):
-        return base64.b64encode(blob_bytes).decode("ascii")
-    raise RuntimeError(
-        f"Unknown blob type {blob_type!r}. "
-        "AES/custom-encrypted deployments are out of scope for v1."
-    )
-
-
-def delta_unwrap(value: Any) -> Any:
-    if isinstance(value, dict) and "__delta_snapshot__" in value:
-        return value["__delta_snapshot__"]
-    return value
-
-
-def json_default(obj: Any) -> Any:
-    if isinstance(obj, (bytes, bytearray)):
-        return base64.b64encode(bytes(obj)).decode("ascii")
-    if isinstance(obj, uuid.UUID):
-        return str(obj)
-    raise TypeError(f"Object of type {type(obj).__name__} is not JSON serializable")
-
-
-def resolve_target_checkpoint_id(
-    conn: psycopg.Connection[Any],
-    thread_id: str,
-    checkpoint_ns: str,
-    checkpoint_id: str | None,
-) -> str:
-    if checkpoint_id is not None:
-        return checkpoint_id
-    row = conn.execute(
-        """
-        SELECT checkpoint_id::text
-        FROM checkpoints
-        WHERE thread_id = %s AND checkpoint_ns = %s
-        ORDER BY checkpoint_id DESC
-        LIMIT 1
-        """,
-        (thread_id, checkpoint_ns),
-    ).fetchone()
-    if row is None:
-        raise SystemExit(
-            f"No checkpoints found for thread_id={thread_id!r} "
-            f"checkpoint_ns={checkpoint_ns!r}"
-        )
-    return row[0]
-
-
-def _load_checkpoint(
-    conn: psycopg.Connection[Any],
-    thread_id: str,
-    checkpoint_ns: str,
-    checkpoint_id: str,
-) -> tuple[dict[str, Any], str | None] | None:
-    row = conn.execute(
-        """
-        SELECT checkpoint, parent_checkpoint_id::text
-        FROM checkpoints
-        WHERE thread_id = %s AND checkpoint_ns = %s AND checkpoint_id = %s
-        """,
-        (thread_id, checkpoint_ns, checkpoint_id),
-    ).fetchone()
-    if row is None:
-        return None
-    return row[0], row[1]
-
-
-def _load_seed(
-    conn: psycopg.Connection[Any],
-    *,
-    thread_id: str,
-    checkpoint_ns: str,
-    channel: str,
-    checkpoint_id: str,
-    channel_values: dict[str, Any],
-    channel_versions: dict[str, str],
-) -> dict[str, Any]:
-    cv = channel_values[channel]
-    version = channel_versions.get(channel)
-    if cv is True:
-        blob_row = conn.execute(
-            """
-            SELECT type, blob
-            FROM checkpoint_blobs
-            WHERE thread_id = %s AND checkpoint_ns = %s
-              AND channel = %s AND version = %s
-            """,
-            (thread_id, checkpoint_ns, channel, version),
-        ).fetchone()
-        seed_value = None
-        if blob_row is not None and blob_row[0] != "empty":
-            seed_value = delta_unwrap(decode_blob(blob_row[0], blob_row[1]))
-        return {
-            "delta_kind": "snapshot",
-            "seed_checkpoint_id": checkpoint_id,
-            "seed_version": version,
-            "seed": seed_value,
-        }
-    if isinstance(cv, (int, float, str, bool)) or cv is None:
-        return {
-            "delta_kind": "legacy_plain",
-            "seed_checkpoint_id": checkpoint_id,
-            "seed_version": version,
-            "seed": cv,
-        }
-    blob_row = conn.execute(
-        """
-        SELECT type, blob
-        FROM checkpoint_blobs
-        WHERE thread_id = %s AND checkpoint_ns = %s
-          AND channel = %s AND version = %s
-        """,
-        (thread_id, checkpoint_ns, channel, version),
-    ).fetchone()
-    seed_value = cv if blob_row is None else decode_blob(blob_row[0], blob_row[1])
-    return {
-        "delta_kind": "legacy_plain",
-        "seed_checkpoint_id": checkpoint_id,
-        "seed_version": version,
-        "seed": seed_value,
-    }
-
-
-def _load_writes_for_checkpoint(
-    conn: psycopg.Connection[Any],
-    *,
-    thread_id: str,
-    checkpoint_ns: str,
-    checkpoint_id: str,
-    channel: str,
-) -> list[dict[str, Any]]:
-    """Load writes for one checkpoint, newest-first by ``(task_id, idx)``.
-
-    ``walk_channel`` reverses the accumulated flat list before returning;
-    DESC here yields oldest-first within each checkpoint in the final output,
-    matching ``PostgresSaver._build_delta_channels_writes_history``.
-    """
-    rows = conn.execute(
-        """
-        SELECT task_id::text, idx, type, blob
-        FROM checkpoint_writes
-        WHERE thread_id = %s AND checkpoint_ns = %s
-          AND checkpoint_id = %s AND channel = %s
-        ORDER BY task_id DESC, idx DESC
-        """,
-        (thread_id, checkpoint_ns, checkpoint_id, channel),
-    ).fetchall()
-    return [
-        {
-            "checkpoint_id": checkpoint_id,
-            "task_id": task_id,
-            "idx": idx,
-            "value": decode_blob(blob_type, blob_bytes),
-        }
-        for task_id, idx, blob_type, blob_bytes in rows
-    ]
-
-
-def walk_channel(
-    conn: psycopg.Connection[Any],
-    *,
-    thread_id: str,
-    checkpoint_ns: str,
-    start_checkpoint_id: str | None,
-    channel: str,
-) -> dict[str, Any]:
-    """Walk one channel's parent chain from target.parent backward to seed."""
-    chain_writes_newest_first: list[dict[str, Any]] = []
-    cur = start_checkpoint_id
-    while cur is not None:
-        loaded = _load_checkpoint(conn, thread_id, checkpoint_ns, cur)
-        if loaded is None:
-            break
-        checkpoint_json, parent_id = loaded
-        channel_values = checkpoint_json.get("channel_values") or {}
-        channel_versions = checkpoint_json.get("channel_versions") or {}
-
-        chain_writes_newest_first.extend(
-            _load_writes_for_checkpoint(
-                conn,
-                thread_id=thread_id,
-                checkpoint_ns=checkpoint_ns,
-                checkpoint_id=cur,
-                channel=channel,
-            )
-        )
-
-        if channel in channel_values:
-            seed = _load_seed(
-                conn,
-                thread_id=thread_id,
-                checkpoint_ns=checkpoint_ns,
-                channel=channel,
-                checkpoint_id=cur,
-                channel_values=channel_values,
-                channel_versions=channel_versions,
-            )
-            seed["writes"] = list(reversed(chain_writes_newest_first))
-            return seed
-
-        cur = parent_id
-
-    return {
-        "delta_kind": "no_seed",
-        "seed_checkpoint_id": None,
-        "seed_version": None,
-        "seed": None,
-        "writes": list(reversed(chain_writes_newest_first)),
-    }
-
-
-def walk_parent_chain(
-    conn: psycopg.Connection[Any],
-    *,
-    thread_id: str,
-    checkpoint_ns: str,
-    target_checkpoint_id: str,
-    channels: list[str],
-) -> tuple[str | None, dict[str, dict[str, Any]]]:
-    """Walk parent chain and return per-channel seed + writes (oldest-first)."""
-    parent_row = conn.execute(
-        """
-        SELECT parent_checkpoint_id::text
-        FROM checkpoints
-        WHERE thread_id = %s AND checkpoint_ns = %s AND checkpoint_id = %s
-        """,
-        (thread_id, checkpoint_ns, target_checkpoint_id),
-    ).fetchone()
-    if parent_row is None:
-        raise SystemExit(
-            f"Checkpoint {target_checkpoint_id!r} not found for thread {thread_id!r}"
-        )
-    parent_checkpoint_id = parent_row[0]
-
-    result = {
-        ch: walk_channel(
-            conn,
-            thread_id=thread_id,
-            checkpoint_ns=checkpoint_ns,
-            start_checkpoint_id=parent_checkpoint_id,
-            channel=ch,
-        )
-        for ch in channels
-    }
-    return parent_checkpoint_id, result
-
-
-def build_output(
-    *,
-    thread_id: str,
-    checkpoint_ns: str,
-    target_checkpoint_id: str,
-    parent_checkpoint_id: str | None,
-    channels: dict[str, dict[str, Any]],
-) -> dict[str, Any]:
-    return {
-        "thread_id": thread_id,
-        "checkpoint_ns": checkpoint_ns,
-        "target_checkpoint_id": target_checkpoint_id,
-        "parent_checkpoint_id": parent_checkpoint_id,
-        "channels": channels,
-    }
-
-
-def parse_args(argv: list[str] | None = None) -> argparse.Namespace:
-    parser = argparse.ArgumentParser(
-        description=(
-            "Recover delta-channel seed + writes from Postgres checkpoint data."
-        ),
-    )
-    parser.add_argument("--thread-id", required=True, help="Thread UUID")
-    parser.add_argument(
-        "--channel",
-        action="append",
-        required=True,
-        dest="channels",
-        help="Channel name (repeatable)",
-    )
-    parser.add_argument(
-        "--checkpoint-id",
-        default=None,
-        help="Target checkpoint UUID (default: latest for thread)",
-    )
-    parser.add_argument(
-        "--checkpoint-ns",
-        default="",
-        help='Checkpoint namespace (default: "")',
-    )
-    parser.add_argument(
-        "--database-uri",
-        default=os.environ.get("DATABASE_URI"),
-        help="Postgres URI (default: DATABASE_URI env var)",
-    )
-    parser.add_argument(
-        "--output",
-        default="-",
-        help="Output JSON file path (default: stdout)",
-    )
-    return parser.parse_args(argv)
-
-
-def main(argv: list[str] | None = None) -> int:
-    args = parse_args(argv)
-    if not args.database_uri:
-        print(
-            "error: --database-uri or DATABASE_URI is required",
-            file=sys.stderr,
-        )
-        return 2
-
-    thread_id = str(uuid.UUID(args.thread_id))
-    channels = list(dict.fromkeys(args.channels))
-
-    with psycopg.connect(args.database_uri) as conn:
-        target_checkpoint_id = resolve_target_checkpoint_id(
-            conn,
-            thread_id,
-            args.checkpoint_ns,
-            args.checkpoint_id,
-        )
-        parent_checkpoint_id, channel_data = walk_parent_chain(
-            conn,
-            thread_id=thread_id,
-            checkpoint_ns=args.checkpoint_ns,
-            target_checkpoint_id=target_checkpoint_id,
-            channels=channels,
-        )
-
-    output = build_output(
-        thread_id=thread_id,
-        checkpoint_ns=args.checkpoint_ns,
-        target_checkpoint_id=target_checkpoint_id,
-        parent_checkpoint_id=parent_checkpoint_id,
-        channels=channel_data,
-    )
-    payload = json.dumps(output, indent=2, default=json_default)
-
-    if args.output == "-":
-        print(payload)
-    else:
-        with open(args.output, "w", encoding="utf-8") as f:
-            f.write(payload)
-            f.write("\n")
-    return 0
-
-
-if __name__ == "__main__":
-    raise SystemExit(main())

libs/checkpoint-conformance/README.md

@@ -1,27 +1,15 @@
-# LangGraph Checkpoint Conformance
+# langgraph-checkpoint-conformance
 
-[![PyPI - Version](https://img.shields.io/pypi/v/langgraph-checkpoint-conformance?label=%20)](https://pypi.org/project/langgraph-checkpoint-conformance/#history)
-[![PyPI - License](https://img.shields.io/pypi/l/langgraph-checkpoint-conformance)](https://opensource.org/licenses/MIT)
-[![PyPI - Downloads](https://img.shields.io/pepy/dt/langgraph-checkpoint-conformance)](https://pypistats.org/packages/langgraph-checkpoint-conformance)
-[![Twitter](https://img.shields.io/twitter/url/https/twitter.com/langchain_oss.svg?style=social&label=Follow%20%40LangChain)](https://x.com/langchain_oss)
+Conformance test suite for [LangGraph](https://github.com/langchain-ai/langgraph) checkpointer implementations.
 
-To help you ship LangGraph apps to production faster, check out [LangSmith](https://www.langchain.com/langsmith).
-[LangSmith](https://www.langchain.com/langsmith) is a unified developer platform for building, testing, and monitoring LLM applications.
+Validates that a `BaseCheckpointSaver` subclass correctly implements the checkpoint storage contract — blob round-trips, metadata preservation, namespace isolation, incremental channel updates, and more.
 
-## Quick Install
+## Installation
 
 ```bash
-uv add langgraph-checkpoint-conformance
+pip install langgraph-checkpoint-conformance
 ```
 
-## 🤔 What is this?
-
-This library provides a conformance test suite for [LangGraph](https://github.com/langchain-ai/langgraph) checkpointer implementations. It validates that a `BaseCheckpointSaver` subclass correctly implements the checkpoint storage contract — blob round-trips, metadata preservation, namespace isolation, incremental channel updates, and more.
-
-## 📖 Documentation
-
-For full documentation, see the [API reference](https://reference.langchain.com/python/langgraph/). For conceptual guides on persistence and memory, see the [LangGraph Docs](https://docs.langchain.com/oss/python/langgraph/overview).
-
 ## Quick start
 
 Register your checkpointer with `@checkpointer_test` and run `validate()`:
@@ -122,13 +110,3 @@ async def pg_checkpointer():
     async with PostgresSaver.from_conn_string(CONN_STRING) as saver:
         yield saver
 ```
-
-## 📕 Releases & Versioning
-
-See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning](https://docs.langchain.com/oss/python/versioning) policies.
-
-## 💁 Contributing
-
-As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
-
-For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview).

libs/checkpoint-conformance/pyproject.toml

@@ -58,14 +58,8 @@ lint.select = [
   "UP", # pyupgrade
   "B",  # flake8-bugbear
   "I",  # isort
-  "PLC0415",  # import-outside-top-level
-  "RUF100",  # unused noqa directive
 ]
 lint.ignore = ["E501", "B008"]
-# PLC0415 (import-outside-top-level) is enforced in tests only. Library code
-# still has deferred imports that have not been reviewed, so it stays exempt
-# for now.
-lint.per-file-ignores = { "langgraph/**" = ["PLC0415"] }
 target-version = "py310"
 
 [tool.uv.sources]

libs/checkpoint-conformance/uv.lock

@@ -247,7 +247,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.5.2"
+version = "1.4.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -260,21 +260,21 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/6e/58/3ad53096eee1e07728e8219ded30ae308b0f2b8b7b26b8ebb6371917c0f5/langchain_core-1.5.2.tar.gz", hash = "sha256:2d13ab35b42eec63d4669a483776b8cdd778ee764107149369fb369d84c08c41", size = 972322, upload-time = "2026-07-28T16:38:37.977Z" }
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libs/checkpoint-postgres/README.md

@@ -1,28 +1,10 @@
 # LangGraph Checkpoint Postgres
 
-[![PyPI - Version](https://img.shields.io/pypi/v/langgraph-checkpoint-postgres?label=%20)](https://pypi.org/project/langgraph-checkpoint-postgres/#history)
-[![PyPI - License](https://img.shields.io/pypi/l/langgraph-checkpoint-postgres)](https://opensource.org/licenses/MIT)
-[![PyPI - Downloads](https://img.shields.io/pepy/dt/langgraph-checkpoint-postgres)](https://pypistats.org/packages/langgraph-checkpoint-postgres)
-[![Twitter](https://img.shields.io/twitter/url/https/twitter.com/langchain_oss.svg?style=social&label=Follow%20%40LangChain)](https://x.com/langchain_oss)
+Implementation of LangGraph CheckpointSaver that uses Postgres.
 
-To help you ship LangGraph apps to production faster, check out [LangSmith](https://www.langchain.com/langsmith).
-[LangSmith](https://www.langchain.com/langsmith) is a unified developer platform for building, testing, and monitoring LLM applications.
+## Dependencies
 
-## Quick Install
-
-```bash
-uv add langgraph-checkpoint-postgres
-```
-
-## 🤔 What is this?
-
-This library provides a Postgres implementation of LangGraph's checkpoint saver. Use it when you want LangGraph state persistence backed by Postgres for durable, long-running workflows and agents.
-
-By default, `langgraph-checkpoint-postgres` installs `psycopg` (Psycopg 3) without any extras. You can choose a specific installation that best suits your needs in the [Psycopg installation docs](https://www.psycopg.org/psycopg3/docs/basic/install.html), for example `psycopg[binary]`.
-
-## 📖 Documentation
-
-For full documentation, see the [API reference](https://reference.langchain.com/python/langgraph.checkpoint.postgres). For conceptual guides on persistence and memory, see the [LangGraph Docs](https://docs.langchain.com/oss/python/langgraph/overview).
+By default `langgraph-checkpoint-postgres` installs `psycopg` (Psycopg 3) without any extras. However, you can choose a specific installation that best suits your needs [here](https://www.psycopg.org/psycopg3/docs/basic/install.html) (for example, `psycopg[binary]`).
 
 ## Security
 
@@ -38,12 +20,10 @@ For full documentation, see the [API reference](https://reference.langchain.com/
 > When manually creating Postgres connections and passing them to `PostgresSaver` or `AsyncPostgresSaver`, make sure to include `autocommit=True` and `row_factory=dict_row` (`from psycopg.rows import dict_row`). See a full example in this [how-to guide](https://langchain-ai.github.io/langgraph/how-tos/persistence_postgres/).
 >
 > **Why these parameters are required:**
->
 > - `autocommit=True`: Required for the `.setup()` method to properly commit the checkpoint tables to the database. Without this, table creation may not be persisted.
 > - `row_factory=dict_row`: Required because the PostgresSaver implementation accesses database rows using dictionary-style syntax (e.g., `row["column_name"]`). The default `tuple_row` factory returns tuples that only support index-based access (e.g., `row[0]`), which will cause `TypeError` exceptions when the checkpointer tries to access columns by name.
 >
 > **Example of incorrect usage:**
->
 > ```python
 > # ❌ This will fail with TypeError during checkpointer operations
 > with psycopg.connect(DB_URI) as conn:  # Missing autocommit=True and row_factory=dict_row
@@ -67,12 +47,24 @@ with PostgresSaver.from_conn_string(DB_URI) as checkpointer:
         "v": 4,
         "ts": "2024-07-31T20:14:19.804150+00:00",
         "id": "1ef4f797-8335-6428-8001-8a1503f9b875",
-        "channel_values": {"my_key": "meow", "node": "node"},
-        "channel_versions": {"__start__": 2, "my_key": 3, "start:node": 3, "node": 3},
+        "channel_values": {
+            "my_key": "meow",
+            "node": "node"
+        },
+        "channel_versions": {
+            "__start__": 2,
+            "my_key": 3,
+            "start:node": 3,
+            "node": 3
+        },
         "versions_seen": {
             "__input__": {},
-            "__start__": {"__start__": 1},
-            "node": {"start:node": 2},
+            "__start__": {
+            "__start__": 1
+            },
+            "node": {
+            "start:node": 2
+            }
         },
     }
 
@@ -96,12 +88,24 @@ async with AsyncPostgresSaver.from_conn_string(DB_URI) as checkpointer:
         "v": 4,
         "ts": "2024-07-31T20:14:19.804150+00:00",
         "id": "1ef4f797-8335-6428-8001-8a1503f9b875",
-        "channel_values": {"my_key": "meow", "node": "node"},
-        "channel_versions": {"__start__": 2, "my_key": 3, "start:node": 3, "node": 3},
+        "channel_values": {
+            "my_key": "meow",
+            "node": "node"
+        },
+        "channel_versions": {
+            "__start__": 2,
+            "my_key": 3,
+            "start:node": 3,
+            "node": 3
+        },
         "versions_seen": {
             "__input__": {},
-            "__start__": {"__start__": 1},
-            "node": {"start:node": 2},
+            "__start__": {
+            "__start__": 1
+            },
+            "node": {
+            "start:node": 2
+            }
         },
     }
 
@@ -114,13 +118,3 @@ async with AsyncPostgresSaver.from_conn_string(DB_URI) as checkpointer:
     # list checkpoints
     [c async for c in checkpointer.alist(read_config)]
 ```
-
-## 📕 Releases & Versioning
-
-See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning](https://docs.langchain.com/oss/python/versioning) policies.
-
-## 💁 Contributing
-
-As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
-
-For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview).

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

@@ -223,7 +223,7 @@ class PostgresSaver(BasePostgresSaver):
             >>> checkpoint_tuple = memory.get_tuple(config)
             >>> print(checkpoint_tuple)
             CheckpointTuple(...)
-        """
+        """  # noqa
         thread_id = config["configurable"]["thread_id"]
         checkpoint_id = get_checkpoint_id(config)
         checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
@@ -478,11 +478,9 @@ class PostgresSaver(BasePostgresSaver):
         stage1_sql = _build_delta_stage1_sql(channels, paged=True)
         parent_of: dict[str, str | None] = {}
         ver_by_i_by_cid: list[dict[str, str | None]] = [{} for _ in channels]
-        hb_by_i_by_cid: list[dict[str, bool]] = [{} for _ in channels]
-        inline_by_i_by_cid: list[dict[str, Any]] = [{} for _ in channels]
+        hs_by_i_by_cid: list[dict[str, bool]] = [{} for _ in channels]
         chain_by_ch: dict[str, list[str]] = {ch: [] for ch in channels}
         seed_ver_by_ch: dict[str, str | None] = {ch: None for ch in channels}
-        seed_inline_by_ch: dict[str, Any] = {}
         walk_cursor_by_ch: dict[str, str | None] = {}
         seeded: set[str] = set()
         cursor: str | None = None
@@ -491,8 +489,7 @@ class PostgresSaver(BasePostgresSaver):
             while True:
                 stage1_params: list[Any] = []
                 for ch in channels:
-                    # ver_i, blob channel, blob version, inline_i
-                    stage1_params.extend([ch, ch, ch, ch])
+                    stage1_params.extend([ch, ch])
                 stage1_params.extend(
                     [thread_id, checkpoint_ns, cursor, cursor, _DELTA_PAGE_SIZE]
                 )
@@ -505,19 +502,16 @@ class PostgresSaver(BasePostgresSaver):
                     channels,
                     parent_of,
                     ver_by_i_by_cid,
-                    hb_by_i_by_cid,
-                    inline_by_i_by_cid,
+                    hs_by_i_by_cid,
                 )
                 self._try_advance_walks(
                     checkpoint_id,
                     channels,
                     parent_of,
                     ver_by_i_by_cid,
-                    hb_by_i_by_cid,
-                    inline_by_i_by_cid,
+                    hs_by_i_by_cid,
                     chain_by_ch,
                     seed_ver_by_ch,
-                    seed_inline_by_ch,
                     walk_cursor_by_ch,
                     seeded,
                 )
@@ -552,7 +546,6 @@ class PostgresSaver(BasePostgresSaver):
             channels=channels,
             chain_by_ch=chain_by_ch,
             seed_ver_by_ch=seed_ver_by_ch,
-            seed_inline_by_ch=seed_inline_by_ch,
             stage2_rows=cast("list[_DeltaStage2Row]", stage2_rows),
         )
 

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

@@ -426,11 +426,9 @@ class AsyncPostgresSaver(BasePostgresSaver):
         stage1_sql = _build_delta_stage1_sql(channels, paged=True)
         parent_of: dict[str, str | None] = {}
         ver_by_i_by_cid: list[dict[str, str | None]] = [{} for _ in channels]
-        hb_by_i_by_cid: list[dict[str, bool]] = [{} for _ in channels]
-        inline_by_i_by_cid: list[dict[str, Any]] = [{} for _ in channels]
+        hs_by_i_by_cid: list[dict[str, bool]] = [{} for _ in channels]
         chain_by_ch: dict[str, list[str]] = {ch: [] for ch in channels}
         seed_ver_by_ch: dict[str, str | None] = {ch: None for ch in channels}
-        seed_inline_by_ch: dict[str, Any] = {}
         walk_cursor_by_ch: dict[str, str | None] = {}
         seeded: set[str] = set()
         cursor: str | None = None
@@ -439,8 +437,7 @@ class AsyncPostgresSaver(BasePostgresSaver):
             while True:
                 stage1_params: list[Any] = []
                 for ch in channels:
-                    # ver_i, blob channel, blob version, inline_i
-                    stage1_params.extend([ch, ch, ch, ch])
+                    stage1_params.extend([ch, ch])
                 stage1_params.extend(
                     [thread_id, checkpoint_ns, cursor, cursor, _DELTA_PAGE_SIZE]
                 )
@@ -453,19 +450,16 @@ class AsyncPostgresSaver(BasePostgresSaver):
                     channels,
                     parent_of,
                     ver_by_i_by_cid,
-                    hb_by_i_by_cid,
-                    inline_by_i_by_cid,
+                    hs_by_i_by_cid,
                 )
                 self._try_advance_walks(
                     checkpoint_id,
                     channels,
                     parent_of,
                     ver_by_i_by_cid,
-                    hb_by_i_by_cid,
-                    inline_by_i_by_cid,
+                    hs_by_i_by_cid,
                     chain_by_ch,
                     seed_ver_by_ch,
-                    seed_inline_by_ch,
                     walk_cursor_by_ch,
                     seeded,
                 )
@@ -496,7 +490,6 @@ class AsyncPostgresSaver(BasePostgresSaver):
             channels=channels,
             chain_by_ch=chain_by_ch,
             seed_ver_by_ch=seed_ver_by_ch,
-            seed_inline_by_ch=seed_inline_by_ch,
             stage2_rows=cast("list[_DeltaStage2Row]", stage2_rows),
         )
 
@@ -580,7 +573,7 @@ class AsyncPostgresSaver(BasePostgresSaver):
         while True:
             try:
                 yield asyncio.run_coroutine_threadsafe(
-                    anext(aiter_),  # type: ignore[arg-type]
+                    anext(aiter_),  # type: ignore[arg-type]  # noqa: F821
                     self.loop,
                 ).result()
             except StopAsyncIteration:

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

@@ -199,68 +199,27 @@ class _DeltaStage2Row(TypedDict, total=False):
 
 
 def _build_delta_stage1_sql(channels: Sequence[str], *, paged: bool) -> str:
-    """Build stage 1 SQL with K parallel version lookups + seed probes.
+    """Build stage 1 SQL with 2K parallel JSONB key lookups.
 
     For channels=["messages", "files"] (with `paged=True`) the result is::
 
         SELECT checkpoint_id, parent_checkpoint_id,
                checkpoint -> 'channel_versions' ->> %s AS ver_0,
-               EXISTS (SELECT 1 FROM checkpoint_blobs b0
-                       WHERE b0.thread_id = checkpoints.thread_id
-                         AND b0.checkpoint_ns = checkpoints.checkpoint_ns
-                         AND b0.channel = %s
-                         AND b0.version = checkpoint -> 'channel_versions' ->> %s
-                         AND b0.type <> 'empty') AS hb_0,
-               checkpoint -> 'channel_values' -> %s AS inline_0,
+               (checkpoint -> 'channel_values' -> %s) IS NOT NULL AS hs_0,
                checkpoint -> 'channel_versions' ->> %s AS ver_1,
-               EXISTS (...) AS hb_1,
-               checkpoint -> 'channel_values' -> %s AS inline_1
+               (checkpoint -> 'channel_values' -> %s) IS NOT NULL AS hs_1
         FROM checkpoints
         WHERE thread_id = %s AND checkpoint_ns = %s
           AND (%s::text IS NULL OR checkpoint_id < %s)
         ORDER BY checkpoint_id DESC
         LIMIT %s
 
-    A stored value for a channel lives in one of two places, because `put`
-    splits them:
-
-    * **blob** — non-primitive values (and `_DeltaSnapshot`) are moved to
-      `checkpoint_blobs`. `hb_i` ("has blob") probes for one. The probe hits
-      that table's primary key `(thread_id, checkpoint_ns, channel, version)`
-      exactly, so it is an index lookup per row per channel.
-    * **inline** — `None`, `str`, `int`, `float` and `bool` stay in the
-      checkpoint's own `channel_values` and get no blob row at all. `inline_i`
-      returns that value.
-
-    Testing only for a key in `channel_values` (the previous approach) missed
-    blob-stored plain values, since `put` leaves an inline marker there for
-    `_DeltaSnapshot` but not for a plain value — which is what a thread
-    migrated from a pre-delta channel type leaves behind. Probing only the
-    blobs table would conversely miss inline primitives. Both are needed, and
-    the caller treats "either present" as the seed.
-
-    `hb_i` also disambiguates the two: for a `_DeltaSnapshot`, `inline_i` is the
-    literal `true` marker rather than the value, so a blob must win over an
-    inline reading whenever one exists. That ordering is what makes a genuine
-    inline `true` (a bool channel) distinguishable from the marker.
-
-    The `type <> 'empty'` predicate mirrors the check stage 2 already applies
-    when resolving the seed blob. `put` does not currently produce `empty` rows
-    on this path — `blob_versions` is filtered to keys present in
-    `channel_values`, so `_dump_blobs`' empty branch is unreachable from it —
-    but without the predicate the two stages could disagree: stage 1 would
-    terminate the walk on a row stage 2 then discards, yielding no seed *and* a
-    truncated write chain, which is the failure this function exists to avoid.
-
     Channel names are passed as `%s` parameters (safe from SQL injection).
-    Only the column aliases `ver_i` / `hb_i` / `inline_i` and the subquery alias
-    `b{i}` are interpolated into the SQL string (i is bounded by len(channels)
-    and uses safe identifiers).
+    Only the column aliases `ver_i` / `hs_i` are interpolated into the
+    SQL string (i is bounded by len(channels) and uses safe identifiers).
 
-    Caller must extend params with `[ch_0 x4, ch_1 x4, ..., thread_id, ns,
-    cursor, cursor, page_size]` when `paged=True` — four per channel: the
-    version lookup, the blob's channel, the version the blob must match, and the
-    inline lookup.
+    Caller must extend params with `[ch_0, ch_0, ch_1, ch_1, ...,
+    thread_id, ns, cursor, cursor, page_size]` when `paged=True`.
 
     When `paged=False`, the WHERE has no cursor predicate and there's no
     LIMIT/ORDER BY — kept as a non-public helper for tests/diagnostics.
@@ -269,13 +228,7 @@ def _build_delta_stage1_sql(channels: Sequence[str], *, paged: bool) -> str:
     for i in range(len(channels)):
         cols.append(
             f"checkpoint -> 'channel_versions' ->> %s AS ver_{i}, "
-            f"EXISTS (SELECT 1 FROM checkpoint_blobs b{i} "
-            f"WHERE b{i}.thread_id = checkpoints.thread_id "
-            f"AND b{i}.checkpoint_ns = checkpoints.checkpoint_ns "
-            f"AND b{i}.channel = %s "
-            f"AND b{i}.version = checkpoint -> 'channel_versions' ->> %s "
-            f"AND b{i}.type <> 'empty') AS hb_{i}, "
-            f"checkpoint -> 'channel_values' -> %s AS inline_{i}"
+            f"(checkpoint -> 'channel_values' -> %s) IS NOT NULL AS hs_{i}"
         )
     sql = (
         "SELECT checkpoint_id, parent_checkpoint_id, "
@@ -389,8 +342,7 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
         channels: Sequence[str],
         parent_of: dict[str, str | None],
         ver_by_i_by_cid: list[dict[str, str | None]],
-        hb_by_i_by_cid: list[dict[str, bool]],
-        inline_by_i_by_cid: list[dict[str, Any]],
+        hs_by_i_by_cid: list[dict[str, bool]],
     ) -> str | None:
         """Fold one stage-1 page into the running walk-state mappings.
 
@@ -404,8 +356,7 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
             parent_of[cid] = cast("str | None", r["parent_checkpoint_id"])
             for i in range(len(channels)):
                 ver_by_i_by_cid[i][cid] = cast("str | None", r.get(f"ver_{i}"))
-                hb_by_i_by_cid[i][cid] = bool(r.get(f"hb_{i}"))
-                inline_by_i_by_cid[i][cid] = r.get(f"inline_{i}")
+                hs_by_i_by_cid[i][cid] = bool(r.get(f"hs_{i}"))
             # Rows are DESC; the last one is the smallest cid in the page.
             oldest = cid
         return oldest
@@ -416,11 +367,9 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
         channels: Sequence[str],
         parent_of: Mapping[str, str | None],
         ver_by_i_by_cid: Sequence[Mapping[str, str | None]],
-        hb_by_i_by_cid: Sequence[Mapping[str, bool]],
-        inline_by_i_by_cid: Sequence[Mapping[str, Any]],
+        hs_by_i_by_cid: Sequence[Mapping[str, bool]],
         chain_by_ch: dict[str, list[str]],
         seed_ver_by_ch: dict[str, str | None],
-        seed_inline_by_ch: dict[str, Any],
         walk_cursor_by_ch: dict[str, str | None],
         seeded: set[str],
     ) -> None:
@@ -428,15 +377,14 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
 
         Uses the partial `parent_of` map accumulated so far. A walk stops
         either because:
-          (a) it found a stored value for its channel — a blob or an inline
-              primitive (channel becomes seeded),
+          (a) it found a snapshot for its channel (channel becomes seeded),
           (b) it reached a real root (parent_of[cid] is None — fully
               materialized at this point), or
           (c) the next ancestor cid isn't in `parent_of` yet (waiting for
               a later page; the cursor stays put).
 
-        Mutates `chain_by_ch`, `seed_ver_by_ch`, `seed_inline_by_ch`,
-        `walk_cursor_by_ch`, and `seeded` in place.
+        Mutates `chain_by_ch`, `seed_ver_by_ch`, `walk_cursor_by_ch`, and
+        `seeded` in place.
         """
         for i, ch in enumerate(channels):
             if ch in seeded:
@@ -446,22 +394,15 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
                 walk_cursor_by_ch[ch] = parent_of.get(target_id)
             cur_cid = walk_cursor_by_ch[ch]
             ch_chain = chain_by_ch[ch]
-            hb_i = hb_by_i_by_cid[i]
-            inline_i = inline_by_i_by_cid[i]
+            hs_i = hs_by_i_by_cid[i]
             ver_i = ver_by_i_by_cid[i]
             while cur_cid is not None:
                 if cur_cid not in parent_of:
                     # Need more pages to continue this walk.
                     break
                 ch_chain.append(cur_cid)
-                has_blob = hb_i.get(cur_cid, False)
-                inline = inline_i.get(cur_cid)
-                if has_blob or inline is not None:
-                    # A blob wins: for a `_DeltaSnapshot` the inline reading is
-                    # the `true` marker, not the value.
+                if hs_i.get(cur_cid, False):
                     seed_ver_by_ch[ch] = ver_i.get(cur_cid)
-                    if not has_blob:
-                        seed_inline_by_ch[ch] = inline
                     seeded.add(ch)
                     cur_cid = None
                     break
@@ -474,23 +415,16 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
         channels: Sequence[str],
         chain_by_ch: Mapping[str, list[str]],
         seed_ver_by_ch: Mapping[str, str | None],
-        seed_inline_by_ch: Mapping[str, Any],
         stage2_rows: Sequence[_DeltaStage2Row],
     ) -> dict[str, DeltaChannelHistory]:
         """Demux stage 2 rows per channel; produce per-channel histories.
 
         stage2_rows carry `channel` on every row. We build per-channel
         `writes_by_cid` and per-channel `seed_blob` dicts, then assemble
-        a `DeltaChannelHistory` per requested channel.
-
-        A seed comes from the blobs table when the walk found one there, and
-        otherwise from `seed_inline_by_ch` — `put` keeps `None`, `str`, `int`,
-        `float` and `bool` values in the checkpoint's own `channel_values` with
-        no blob row, so those never appear in `stage2_rows`.
-
-        The `seed` key is omitted when the walk reached root without finding a
-        stored value, or when the seed blob is sentinel "empty" — in both cases
-        the consumer treats absence as "start empty".
+        a `DeltaChannelHistory` per requested channel. The `seed` key is omitted
+        when the walk reached root with no snapshot found, or when the
+        seed blob is sentinel "empty" — in both cases the consumer treats
+        absence as "start empty".
         """
         # writes_by_ch_by_cid[channel][cid] = list of (type, blob, task_id, idx)
         writes_by_ch_by_cid: dict[str, dict[str, list[tuple[str, bytes, str, int]]]] = {
@@ -539,10 +473,6 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
                 blob = seed_blob_by_ver.get((ch, seed_version))
                 if blob is not None and blob[0] != "empty":
                     entry["seed"] = self.serde.loads_typed(blob)
-                elif ch in seed_inline_by_ch:
-                    # Inline primitive: stored in the checkpoint, not the blobs
-                    # table, so stage 2 never returned a row for it.
-                    entry["seed"] = seed_inline_by_ch[ch]
             result[ch] = entry
         return result
 

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

@@ -334,7 +334,7 @@ class ShallowPostgresSaver(BasePostgresSaver):
             >>> checkpoint_tuple = memory.get_tuple(config)
             >>> print(checkpoint_tuple)
             CheckpointTuple(...)
-        """
+        """  # noqa
         thread_id = config["configurable"]["thread_id"]
         checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
         args = (thread_id, checkpoint_ns)
@@ -885,7 +885,7 @@ class AsyncShallowPostgresSaver(BasePostgresSaver):
         while True:
             try:
                 yield asyncio.run_coroutine_threadsafe(
-                    anext(aiter_),  # type: ignore[arg-type]
+                    anext(aiter_),  # type: ignore[arg-type]  # noqa: F821
                     self.loop,
                 ).result()
             except StopAsyncIteration:

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

@@ -4,7 +4,6 @@ import asyncio
 import concurrent.futures
 import json
 import logging
-import re
 import threading
 from collections import defaultdict
 from collections.abc import Callable, Iterable, Iterator, Sequence
@@ -239,12 +238,6 @@ class BasePostgresStore(Generic[C]):
     conn: C
     _deserializer: Callable[[bytes | orjson.Fragment], dict[str, Any]] | None
     index_config: PostgresIndexConfig | None
-    ttl_config: TTLConfig | None
-
-    @property
-    def _omit_expired(self) -> bool:
-        """Whether expired-but-unswept rows should be filtered from reads."""
-        return bool(self.ttl_config and self.ttl_config.get("omit_expired"))
 
     def _get_batch_GET_ops_queries(
         self,
@@ -265,17 +258,12 @@ class BasePostgresStore(Generic[C]):
             namespace_groups[op.namespace].append((idx, op.key))
             refresh_ttls[op.namespace].append(op.refresh_ttl)
 
-        omit_expired = self._omit_expired
-        expiry_clause = (
-            "AND (s.expires_at IS NULL OR s.expires_at > NOW())" if omit_expired else ""
-        )
-
         results = []
         for namespace, items in namespace_groups.items():
             _, keys = zip(*items, strict=False)
             this_refresh_ttls = refresh_ttls[namespace]
 
-            query = f"""
+            query = """
                 WITH passed_in AS (
                     SELECT unnest(%s::text[]) AS key,
                         unnest(%s::bool[])  AS do_refresh
@@ -288,14 +276,12 @@ class BasePostgresStore(Generic[C]):
                     AND s.key    = p.key
                     AND p.do_refresh = TRUE
                     AND s.ttl_minutes IS NOT NULL
-                    {expiry_clause}
                     RETURNING s.key
                 )
                 SELECT s.key, s.value, s.created_at, s.updated_at
                 FROM store s
                 JOIN passed_in p ON s.key = p.key
                 WHERE s.prefix = %s
-                {expiry_clause}
             """
             ns_text = _namespace_to_text(namespace)
             params = (
@@ -436,13 +422,6 @@ class BasePostgresStore(Generic[C]):
         - embedding_requests: list of (original_index_in_search_ops, text_query)
         """
 
-        omit_expired = self._omit_expired
-        search_expiry_clause = (
-            "AND (store.expires_at IS NULL OR store.expires_at > NOW())"
-            if omit_expired
-            else ""
-        )
-
         queries = []
         embedding_requests = []
         for idx, (_, op) in enumerate(search_ops):
@@ -464,9 +443,8 @@ class BasePostgresStore(Generic[C]):
             ns_condition = "TRUE"
             ns_param: Sequence[str] | None = None
             if op.namespace_prefix:
-                ns_condition, ns_param = _namespace_prefix_condition(
-                    op.namespace_prefix
-                )
+                ns_condition = "store.prefix LIKE %s"
+                ns_param = (f"{_namespace_to_text(op.namespace_prefix)}%",)
             else:
                 ns_param = ()
 
@@ -513,7 +491,7 @@ class BasePostgresStore(Generic[C]):
                             {score_operator} AS neg_score
                         FROM store
                         JOIN store_vectors sv ON store.prefix = sv.prefix AND store.key = sv.key
-                        WHERE {ns_condition} {extra_filters} {search_expiry_clause}
+                        WHERE {ns_condition} {extra_filters}
                         ORDER BY {score_operator} ASC
                         LIMIT %s
                     """
@@ -549,7 +527,7 @@ class BasePostgresStore(Generic[C]):
                 base_query = f"""
                         SELECT store.prefix, store.key, store.value, store.created_at, store.updated_at, NULL AS score
                         FROM store
-                        WHERE {ns_condition} {extra_filters} {search_expiry_clause}
+                        WHERE {ns_condition} {extra_filters}
                         ORDER BY store.updated_at DESC
                         LIMIT %s
                         OFFSET %s
@@ -613,23 +591,18 @@ class BasePostgresStore(Generic[C]):
             """
             params: list[Any] = [op.max_depth, op.max_depth]
 
-            omit_expired = self._omit_expired
             conditions = []
-            if omit_expired:
-                conditions.append("(expires_at IS NULL OR expires_at > NOW())")
             if op.match_conditions:
                 for condition in op.match_conditions:
-                    if condition.match_type in ("prefix", "suffix"):
-                        if not condition.path:
-                            # An empty path constrains nothing; skipping keeps it a
-                            # no-op rather than emitting a pattern that matches no
-                            # namespace at all.
-                            continue
-                        conditions.append("prefix ~ %s")
+                    if condition.match_type == "prefix":
+                        conditions.append("prefix LIKE %s")
                         params.append(
-                            _namespace_match_pattern(
-                                condition.path, condition.match_type
-                            )
+                            f"{_namespace_to_text(condition.path, handle_wildcards=True)}%"
+                        )
+                    elif condition.match_type == "suffix":
+                        conditions.append("prefix LIKE %s")
+                        params.append(
+                            f"%{_namespace_to_text(condition.path, handle_wildcards=True)}"
                         )
                     else:
                         logger.warning(
@@ -1275,59 +1248,15 @@ def _get_index_params(store: Any) -> tuple[str, dict[str, Any]]:
     return kind, sanitized
 
 
-def _namespace_to_text(namespace: tuple[str, ...]) -> str:
+def _namespace_to_text(
+    namespace: tuple[str, ...], handle_wildcards: bool = False
+) -> str:
     """Convert namespace tuple to text string."""
+    if handle_wildcards:
+        namespace = tuple("%" if val == "*" else val for val in namespace)
     return ".".join(namespace)
 
 
-def _escape_like_literal(text: str) -> str:
-    """Escape LIKE metacharacters so `text` is matched literally.
-
-    Namespace labels may contain `_` and `%`, which would otherwise act as
-    wildcards: `("user_1",)` would match `("userX1",)`. Backslash is escaped
-    first so it cannot escape the following character. Requires an explicit
-    `ESCAPE '\\'` clause on the pattern.
-    """
-    return text.replace("\\", "\\\\").replace("%", "\\%").replace("_", "\\_")
-
-
-def _namespace_prefix_condition(namespace_prefix: tuple[str, ...]) -> tuple[str, tuple]:
-    """Build the SQL scoping a search to a namespace and its descendants.
-
-    Matches the namespace exactly or requires the `.` separator before any
-    remainder, so a prefix of `("foo",)` does not also match `("foobar",)`.
-
-    Both arms stay index-friendly: equality on the `(prefix, key)` primary key,
-    the anchored LIKE on the `prefix text_pattern_ops` index.
-
-    Only the LIKE arm is escaped -- equality does not interpret metacharacters,
-    so escaping it would stop `("user_1",)` from matching itself.
-    """
-    path = _namespace_to_text(namespace_prefix)
-    condition = r"(store.prefix = %s OR store.prefix LIKE %s ESCAPE '\')"
-    return condition, (path, f"{_escape_like_literal(path)}.%")
-
-
-def _namespace_match_pattern(path: tuple[str, ...], match_type: str) -> str:
-    """Build a POSIX regex matching the dot-joined prefix on whole segments.
-
-    Needed because `LIKE` cannot express "any character except the separator".
-    Matches how `InMemoryStore` compares namespaces element-wise.
-
-    `*` matches exactly one segment. Prefix matches stay open-ended but must end
-    on a separator; suffix matches anchor at the end and begin on one.
-
-    Examples:
-        prefix ("uid", "*", "alice") -> ^uid\\.[^.]+\\.alice(\\.|\\Z)
-        suffix ("alice",)            -> (^|\\.)alice\\Z
-    """
-    segments = ("[^.]+" if part == "*" else re.escape(part) for part in path)
-    body = r"\.".join(segments)
-    if match_type == "suffix":
-        return rf"(^|\.){body}\Z"
-    return rf"^{body}(\.|\Z)"
-
-
 def _row_to_item(
     namespace: tuple[str, ...],
     row: Row,

libs/checkpoint-postgres/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint-postgres"
-version = "3.1.1"
+version = "3.1.0"
 description = "Library with a Postgres implementation of LangGraph checkpoint saver."
 authors = []
 requires-python = ">=3.10"
@@ -32,7 +32,6 @@ test = [
   "pytest-mock",
   "psycopg[binary]",
   "langgraph-checkpoint",
-  "langgraph-checkpoint-conformance",
   "pytest-watcher",
 ]
 lint = [
@@ -50,7 +49,6 @@ default-groups = ['dev']
 
 [tool.uv.sources]
 langgraph-checkpoint = { path = "../checkpoint", editable = true }
-langgraph-checkpoint-conformance = { path = "../checkpoint-conformance", editable = true }
 
 [tool.hatch.build.targets.wheel]
 include = ["langgraph"]
@@ -66,8 +64,6 @@ lint.select = [
   "UP", # pyupgrade
   "B",  # flake8-bugbear
   "I",  # isort
-  "PLC0415",  # import-outside-top-level
-  "RUF100",  # unused noqa directive
   "UP", # pyupgrade
 ]
 lint.ignore = ["E501", "B008"]

libs/checkpoint-postgres/tests/test_async.py

@@ -380,15 +380,13 @@ async def test_delta_channel_chain_reconstruction(saver_name: str) -> None:
         "langgraph.channels.delta", reason="langgraph core not installed"
     )
 
-    # Deferred on purpose: langgraph core is not a test dependency of this
-    # package, so these must stay behind the importorskip above.
-    from typing import Annotated  # noqa: PLC0415
+    from typing import Annotated
 
-    from langchain_core.messages import AIMessage, HumanMessage  # noqa: PLC0415
-    from langgraph.channels.delta import DeltaChannel  # noqa: PLC0415
-    from langgraph.graph import START, StateGraph  # noqa: PLC0415
-    from langgraph.graph.message import _messages_delta_reducer  # noqa: PLC0415
-    from typing_extensions import TypedDict  # noqa: PLC0415
+    from langchain_core.messages import AIMessage, HumanMessage
+    from langgraph.channels.delta import DeltaChannel
+    from langgraph.graph import START, StateGraph
+    from langgraph.graph.message import _messages_delta_reducer
+    from typing_extensions import TypedDict
 
     class State(TypedDict):
         messages: Annotated[list, DeltaChannel(_messages_delta_reducer)]

libs/checkpoint-postgres/tests/test_async_store.py

@@ -739,135 +739,3 @@ async def test_store_ttl(store):
     # Now has been (TTL_SECONDS-2)*2 > TTL_SECONDS + TTL_SECONDS/2
     results = await store.asearch(ns, query="bar", refresh_ttl=False)
     assert len(results) == 0
-
-
-async def _aexpire_now(
-    store: AsyncPostgresStore, ns: tuple[str, ...], key: str
-) -> None:
-    """Backdate a row's expires_at into the past without deleting it (unswept)."""
-    async with store._cursor() as cur:
-        await cur.execute(
-            "UPDATE store SET expires_at = NOW() - INTERVAL '1 minute' "
-            "WHERE prefix = %s AND key = %s",
-            (".".join(ns), key),
-        )
-
-
-async def _arow_exists(
-    store: AsyncPostgresStore, ns: tuple[str, ...], key: str
-) -> bool:
-    async with store._cursor() as cur:
-        await cur.execute(
-            "SELECT COUNT(*) AS n FROM store WHERE prefix = %s AND key = %s",
-            (".".join(ns), key),
-        )
-        return (await cur.fetchone())["n"] == 1
-
-
-async def _astored_expires_at(store: AsyncPostgresStore, ns: tuple[str, ...], key: str):
-    async with store._cursor() as cur:
-        await cur.execute(
-            "SELECT expires_at FROM store WHERE prefix = %s AND key = %s",
-            (".".join(ns), key),
-        )
-        return (await cur.fetchone())["expires_at"]
-
-
-async def test_omit_expired_filters_read_paths(store: AsyncPostgresStore) -> None:
-    await store.stop_ttl_sweeper()  # deterministic: no background deletion
-    store.ttl_config["omit_expired"] = True
-
-    expired_ns = ("omit", "expired")
-    control_ns = ("omit", "control")
-    await store.aput(expired_ns, "e", {"data": "gone"}, ttl=TTL_MINUTES)
-    await store.aput(control_ns, "c", {"data": "keep"}, ttl=None)
-    await _aexpire_now(store, expired_ns, "e")
-
-    # The row is expired but physically still present (unswept).
-    assert await _arow_exists(store, expired_ns, "e")
-
-    # aget omits it; the never-expiring control is still returned.
-    assert await store.aget(expired_ns, "e") is None
-    assert await store.aget(control_ns, "c") is not None
-
-    # asearch omits it but returns the control.
-    assert await store.asearch(expired_ns) == []
-    assert [i.key for i in await store.asearch(control_ns)] == ["c"]
-
-    # alist_namespaces drops the expired-only namespace, keeps the control.
-    namespaces = await store.alist_namespaces(prefix=("omit",))
-    assert expired_ns not in namespaces
-    assert control_ns in namespaces
-
-
-@pytest.mark.parametrize("omit", [None, False], ids=["default", "explicit-false"])
-async def test_omit_expired_disabled_preserves_expired_rows(
-    store: AsyncPostgresStore, omit
-) -> None:
-    await store.stop_ttl_sweeper()
-    if omit is not None:
-        store.ttl_config["omit_expired"] = omit
-
-    ns = ("keep",)
-    await store.aput(ns, "k", {"data": "still-here"}, ttl=TTL_MINUTES)
-    await _aexpire_now(store, ns, "k")
-
-    assert await store.aget(ns, "k", refresh_ttl=False) is not None
-    assert [i.key for i in await store.asearch(ns, refresh_ttl=False)] == ["k"]
-    assert ns in await store.alist_namespaces(prefix=("keep",))
-
-
-async def test_omit_expired_refresh_ttl_only_refreshes_live_rows(
-    store: AsyncPostgresStore,
-) -> None:
-    await store.stop_ttl_sweeper()
-    store.ttl_config["omit_expired"] = True
-
-    ns = ("refresh",)
-    await store.aput(ns, "expired", {"n": 0}, ttl=TTL_MINUTES)
-    await store.aput(ns, "live_get", {"n": 1}, ttl=TTL_MINUTES)
-    await store.aput(ns, "live_search", {"n": 2}, ttl=TTL_MINUTES)
-    await _aexpire_now(store, ns, "expired")
-
-    expired_before = await _astored_expires_at(store, ns, "expired")
-    get_before = await _astored_expires_at(store, ns, "live_get")
-    search_before = await _astored_expires_at(store, ns, "live_search")
-
-    # refresh_ttl=True must NOT resurrect the expired row (via aget or asearch)...
-    assert await store.aget(ns, "expired", refresh_ttl=True) is None
-    live_keys = [i.key for i in await store.asearch(ns, refresh_ttl=True)]
-    assert "expired" not in live_keys
-    assert await _astored_expires_at(store, ns, "expired") == expired_before
-
-    # ...but must still extend the live rows that were read.
-    assert await store.aget(ns, "live_get", refresh_ttl=True) is not None
-    assert await _astored_expires_at(store, ns, "live_get") > get_before
-    assert await _astored_expires_at(store, ns, "live_search") > search_before
-
-
-async def test_omit_expired_search_pagination(store: AsyncPostgresStore) -> None:
-    await store.stop_ttl_sweeper()
-    store.ttl_config["omit_expired"] = True
-
-    ns = ("page",)
-    for k in ("a", "b", "c"):
-        await store.aput(ns, k, {"k": k}, ttl=TTL_MINUTES)
-    await store.aput(ns, "expired", {"k": "x"}, ttl=TTL_MINUTES)
-    await _aexpire_now(store, ns, "expired")
-
-    seconds_ago = {"a": 1, "expired": 2, "b": 3, "c": 4}
-    # updated_at DESC orders these a, expired, b, c, so the expired row sits inside
-    # the first limit=2 window. Correct (pre-LIMIT) filtering yields live pages
-    # [a, b] then [c]; post-LIMIT filtering would underfill page 1 to just [a].
-    async with store._cursor() as cur:
-        for key, secs in seconds_ago.items():
-            await cur.execute(
-                "UPDATE store SET updated_at = NOW() - (%s * INTERVAL '1 second') "
-                "WHERE prefix = %s AND key = %s",
-                (secs, ".".join(ns), key),
-            )
-
-    page1 = await store.asearch(ns, limit=2, offset=0)
-    page2 = await store.asearch(ns, limit=2, offset=2)
-    assert [i.key for i in page1] == ["a", "b"]
-    assert [i.key for i in page2] == ["c"]

libs/checkpoint-postgres/tests/test_conformance_delta.py

@@ -1,30 +0,0 @@
-"""Run delta-channel conformance capabilities against AsyncPostgresSaver."""
-
-from __future__ import annotations
-
-import pytest
-from langgraph.checkpoint.conformance import validate
-from langgraph.checkpoint.conformance.initializer import checkpointer_test
-
-from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
-from tests.conftest import DEFAULT_URI
-
-
-@pytest.mark.asyncio
-async def test_delta_channel_conformance():
-    @checkpointer_test(name="AsyncPostgresSaver")
-    async def postgres_saver():
-        async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-            await saver.setup()
-            yield saver
-
-    report = await validate(
-        postgres_saver,
-        capabilities={
-            "delta_channel_history",
-        },
-    )
-    for cap, result in report.results.items():
-        if result.passed is False:
-            details = "\n".join(result.failures or [])
-            pytest.fail(f"Capability {cap} failed:\n{details}")

libs/checkpoint-postgres/tests/test_delta_plain_value_seed.py

@@ -1,204 +0,0 @@
-"""Seed detection for `DeltaChannel` histories on Postgres.
-
-`put` splits stored values in two: primitives stay inline in the checkpoint's
-`channel_values`, everything else moves to `checkpoint_blobs`. Only
-`_DeltaSnapshot` leaves an inline marker behind when it moves, so the stage-1
-walk has to check both places — a blob probe alone misses inline primitives, and
-an inline-key check alone missed blob-stored plain values, which is what a thread
-migrated from a pre-delta channel type leaves behind. See #8534.
-"""
-
-from __future__ import annotations
-
-from typing import Any
-from uuid import uuid4
-
-import pytest
-from langgraph.checkpoint.base import Checkpoint, empty_checkpoint
-from langgraph.checkpoint.base.id import uuid6
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
-
-from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
-from tests.conftest import DEFAULT_URI
-
-CHANNEL = "items"
-
-
-async def _build_chain(saver: AsyncPostgresSaver, seed_value: Any) -> tuple[str, dict]:
-    """Store `seed_value` at step 1, then two steps that store nothing.
-
-    Every step carries a write so the walk has something to collect.
-    Returns `(thread_id, head_config)`.
-    """
-    thread_id = str(uuid4())
-    parent: dict | None = None
-    for step in range(4):
-        config: dict = {"configurable": {"thread_id": thread_id, "checkpoint_ns": ""}}
-        if parent is not None:
-            config["configurable"]["checkpoint_id"] = parent["configurable"][
-                "checkpoint_id"
-            ]
-        cp: Checkpoint = empty_checkpoint()
-        cp["id"] = str(uuid6(clock_seq=step))
-        new_versions: dict[str, Any] = {}
-        if step == 1:
-            cp["channel_values"][CHANNEL] = seed_value
-            cp["channel_versions"][CHANNEL] = "v1"
-            new_versions[CHANNEL] = "v1"
-        else:
-            cp["channel_versions"][CHANNEL] = f"v{step}"
-        parent = await saver.aput(
-            config, cp, {"source": "loop", "step": step, "parents": {}}, new_versions
-        )
-        await saver.aput_writes(parent, [(CHANNEL, f"w{step}")], str(uuid4()))
-    assert parent is not None
-    return thread_id, parent
-
-
-@pytest.mark.asyncio
-async def test_plain_value_seed_is_found() -> None:
-    """A pre-delta plain value must be located as the seed.
-
-    Before #8534 the walk ran to the root and returned no seed, which happens
-    to reconstruct correctly for additive reducers while costing an
-    O(thread length) replay on every read.
-    """
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-        _, head = await _build_chain(saver, [10, 20])
-
-        result = await saver.aget_delta_channel_history(config=head, channels=[CHANNEL])
-        entry = result[CHANNEL]
-
-        assert entry.get("seed") == [10, 20], (
-            f"expected the plain value as seed, got {entry.get('seed', '<missing>')}"
-        )
-        # Only the writes between the seed and the head's parent replay: step 1
-        # (the seed's own) and step 2. Step 0 is older than the seed, step 3 is
-        # pending at the head.
-        assert [w[2] for w in entry["writes"]] == ["w1", "w2"]
-
-
-@pytest.mark.asyncio
-async def test_delta_snapshot_seed_is_found() -> None:
-    """The `_DeltaSnapshot` path keeps working, so both seed kinds agree."""
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-        _, head = await _build_chain(saver, _DeltaSnapshot([10, 20]))
-
-        result = await saver.aget_delta_channel_history(config=head, channels=[CHANNEL])
-        entry = result[CHANNEL]
-
-        seed = entry.get("seed")
-        assert isinstance(seed, _DeltaSnapshot), f"expected a snapshot, got {seed!r}"
-        assert seed.value == [10, 20]
-        assert [w[2] for w in entry["writes"]] == ["w1", "w2"]
-
-
-@pytest.mark.asyncio
-async def test_version_bump_without_a_value_does_not_hide_an_older_seed() -> None:
-    """A delta-era step bumps `channel_versions` without storing a value, so no
-    blob exists for that version. The probe must report no seed there and keep
-    walking rather than stopping at a version it cannot resolve.
-
-    Step 0 holds the real value; step 1 bumps the version with nothing stored.
-    Walking back from the head has to pass step 1 to reach step 0.
-    """
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-        thread_id = str(uuid4())
-        parent: dict | None = None
-        for step in range(4):
-            config: dict = {
-                "configurable": {"thread_id": thread_id, "checkpoint_ns": ""}
-            }
-            if parent is not None:
-                config["configurable"]["checkpoint_id"] = parent["configurable"][
-                    "checkpoint_id"
-                ]
-            cp: Checkpoint = empty_checkpoint()
-            cp["id"] = str(uuid6(clock_seq=step))
-            new_versions: dict[str, Any] = {}
-            if step == 0:
-                cp["channel_values"][CHANNEL] = [10, 20]
-                cp["channel_versions"][CHANNEL] = "v0"
-                new_versions[CHANNEL] = "v0"
-            elif step == 1:
-                # Version bumped, value absent -> no blob row written.
-                cp["channel_versions"][CHANNEL] = "v1"
-                new_versions[CHANNEL] = "v1"
-            else:
-                cp["channel_versions"][CHANNEL] = "v1"
-            parent = await saver.aput(
-                config,
-                cp,
-                {"source": "loop", "step": step, "parents": {}},
-                new_versions,
-            )
-            await saver.aput_writes(parent, [(CHANNEL, f"w{step}")], str(uuid4()))
-        assert parent is not None
-
-        result = await saver.aget_delta_channel_history(
-            config=parent, channels=[CHANNEL]
-        )
-        entry = result[CHANNEL]
-
-        assert entry.get("seed") == [10, 20], (
-            "the walk stopped at the empty blob instead of reaching the real "
-            f"value at step 0; got {entry.get('seed', '<missing>')}"
-        )
-        assert [w[2] for w in entry["writes"]] == ["w0", "w1", "w2"]
-
-
-@pytest.mark.asyncio
-async def test_inline_primitive_seed_is_found() -> None:
-    """`put` keeps `None`, `str`, `int`, `float` and `bool` in the checkpoint's
-    own `channel_values` with no blob row, so a blob probe alone cannot see
-    them. Stage 1 reads the inline value too and uses it when there is no blob.
-    """
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-        for seed_value in (42, "x", 3.5, None):
-            _, head = await _build_chain(saver, seed_value)
-            entry = (
-                await saver.aget_delta_channel_history(config=head, channels=[CHANNEL])
-            )[CHANNEL]
-            if seed_value is None:
-                # A JSON null is indistinguishable from "no value stored", so
-                # the walk keeps going; replay from empty is the correct result.
-                assert "seed" not in entry
-            else:
-                assert entry.get("seed") == seed_value, (
-                    f"inline {type(seed_value).__name__} seed not found: "
-                    f"{entry.get('seed', '<missing>')!r}"
-                )
-                assert [w[2] for w in entry["writes"]] == ["w1", "w2"]
-
-
-@pytest.mark.asyncio
-async def test_inline_true_is_not_read_as_a_snapshot_marker() -> None:
-    """`put` inlines a literal `true` in `channel_values` as the marker for a
-    `_DeltaSnapshot`, which is also what a genuine `bool` channel holding
-    `True` looks like. A blob exists only in the snapshot case, so preferring
-    the blob keeps the two apart.
-    """
-    async with AsyncPostgresSaver.from_conn_string(DEFAULT_URI) as saver:
-        await saver.setup()
-
-        _, head = await _build_chain(saver, True)
-        entry = (
-            await saver.aget_delta_channel_history(config=head, channels=[CHANNEL])
-        )[CHANNEL]
-        assert entry.get("seed") is True, (
-            f"a real inline True must survive, got {entry.get('seed', '<missing>')!r}"
-        )
-
-        _, snap_head = await _build_chain(saver, _DeltaSnapshot(True))
-        snap_entry = (
-            await saver.aget_delta_channel_history(config=snap_head, channels=[CHANNEL])
-        )[CHANNEL]
-        seed = snap_entry.get("seed")
-        assert isinstance(seed, _DeltaSnapshot), (
-            f"the marker must resolve to the blob, not inline true; got {seed!r}"
-        )
-        assert seed.value is True

libs/checkpoint-postgres/tests/test_store.py

@@ -20,10 +20,6 @@ from langgraph.store.base import (
 from psycopg import Connection
 
 from langgraph.store.postgres import PostgresStore
-from langgraph.store.postgres.base import (
-    _escape_like_literal,
-    _namespace_match_pattern,
-)
 from tests.conftest import (
     DEFAULT_URI,
     VECTOR_TYPES,
@@ -330,127 +326,6 @@ def test_list_namespaces(store) -> None:
         store.delete(namespace, "dummy")
 
 
-def test_escape_like_literal() -> None:
-    assert _escape_like_literal("users.alice") == "users.alice"
-    assert _escape_like_literal("user_1") == r"user\_1"
-    assert _escape_like_literal("100%") == r"100\%"
-    assert _escape_like_literal("a\\b") == "a\\\\b"
-    assert _escape_like_literal("") == ""
-
-
-def test_namespace_match_pattern() -> None:
-    assert _namespace_match_pattern(("foo",), "prefix") == r"^foo(\.|\Z)"
-    assert _namespace_match_pattern(("uid", "users"), "prefix") == r"^uid\.users(\.|\Z)"
-    assert (
-        _namespace_match_pattern(("uid", "*", "alice"), "prefix")
-        == r"^uid\.[^.]+\.alice(\.|\Z)"
-    )
-    assert _namespace_match_pattern(("alice",), "suffix") == r"(^|\.)alice\Z"
-
-    # Regex metacharacters in a label are quoted, not interpreted.
-    pattern = _namespace_match_pattern(("a.b+c",), "prefix")
-    assert re.match(pattern, "a.b+c.child")
-    assert not re.match(pattern, "axbbbc")
-
-
-def test_search_namespace_segment_boundary(store) -> None:
-    """Prefix scoping must stop at namespace segment boundaries.
-
-    Namespaces are stored dot-joined, so matching the raw text also returns
-    siblings sharing leading characters. Callers isolate tenants by namespace,
-    so prefix-shaped ids (1 vs 12) would cross-read.
-    """
-    for namespace in [
-        ("foo",),
-        ("foo", "child"),
-        ("foo", "child", "deep"),
-        ("foobar",),
-        ("foobar", "baz"),
-        ("foo2",),
-    ]:
-        store.put(namespace, "k", {"v": 1})
-
-    def _namespaces(prefix: tuple[str, ...]) -> set[tuple[str, ...]]:
-        return {item.namespace for item in store.search(prefix, limit=100)}
-
-    assert _namespaces(("foo",)) == {
-        ("foo",),
-        ("foo", "child"),
-        ("foo", "child", "deep"),
-    }
-    # The sibling scope is independent, not merely narrower.
-    assert _namespaces(("foobar",)) == {("foobar",), ("foobar", "baz")}
-    assert _namespaces(("foo", "child")) == {("foo", "child"), ("foo", "child", "deep")}
-    assert _namespaces(("foo2",)) == {("foo2",)}
-    assert _namespaces(("fo",)) == set()
-
-
-def test_search_empty_prefix_is_unconstrained(store) -> None:
-    """An empty prefix constrains nothing and must return every namespace."""
-    for namespace in [("a",), ("b", "c"), ("d", "e", "f")]:
-        store.put(namespace, "k", {"v": 1})
-
-    assert {item.namespace for item in store.search((), limit=100)} == {
-        ("a",),
-        ("b", "c"),
-        ("d", "e", "f"),
-    }
-
-
-def test_search_namespace_like_metacharacters(store) -> None:
-    """`_` and `%` are legal namespace labels, not LIKE wildcards."""
-    for namespace in [
-        ("user_1",),
-        ("user_1", "child"),
-        ("userX1",),
-        ("a%b",),
-        ("axxb",),
-    ]:
-        store.put(namespace, "k", {"v": 1})
-
-    def _namespaces(prefix: tuple[str, ...]) -> set[tuple[str, ...]]:
-        return {item.namespace for item in store.search(prefix, limit=100)}
-
-    # Also asserts the namespace still matches itself, which catches escaping
-    # the equality arm by mistake.
-    assert _namespaces(("user_1",)) == {("user_1",), ("user_1", "child")}
-    assert _namespaces(("a%b",)) == {("a%b",)}
-
-
-def test_list_namespaces_segment_boundary(store) -> None:
-    for namespace in [
-        ("foo",),
-        ("foo", "child"),
-        ("foobar",),
-        ("foobar", "baz"),
-        ("uid", "users", "alice"),
-        ("uid", "users", "malice"),
-        ("uid", "a", "b", "alice"),
-    ]:
-        store.put(namespace, "k", {"v": 1})
-
-    assert set(store.list_namespaces(prefix=["foo"], limit=100)) == {
-        ("foo",),
-        ("foo", "child"),
-    }
-    # Suffix must align to a segment: "malice" does not end with the "alice"
-    # segment.
-    assert set(store.list_namespaces(suffix=["alice"], limit=100)) == {
-        ("uid", "users", "alice"),
-        ("uid", "a", "b", "alice"),
-    }
-    # "*" spans exactly one segment.
-    assert set(store.list_namespaces(prefix=["uid", "*", "alice"], limit=100)) == {
-        ("uid", "users", "alice"),
-    }
-    # Prefix matching stays open-ended across depth.
-    assert set(store.list_namespaces(prefix=["uid"], limit=100)) == {
-        ("uid", "users", "alice"),
-        ("uid", "users", "malice"),
-        ("uid", "a", "b", "alice"),
-    }
-
-
 def test_search(store) -> None:
     # Create test data
     test_data = [
@@ -988,133 +863,6 @@ def test_store_ttl(store):
     assert len(res) == 0
 
 
-def _expire_now(store: PostgresStore, ns: tuple[str, ...], key: str) -> None:
-    """Backdate a row's expires_at into the past without deleting it (unswept)."""
-    with store._cursor() as cur:
-        cur.execute(
-            "UPDATE store SET expires_at = NOW() - INTERVAL '1 minute' "
-            "WHERE prefix = %s AND key = %s",
-            (".".join(ns), key),
-        )
-
-
-def _row_exists(store: PostgresStore, ns: tuple[str, ...], key: str) -> bool:
-    with store._cursor() as cur:
-        cur.execute(
-            "SELECT COUNT(*) AS n FROM store WHERE prefix = %s AND key = %s",
-            (".".join(ns), key),
-        )
-        return cur.fetchone()["n"] == 1
-
-
-def _stored_expires_at(store: PostgresStore, ns: tuple[str, ...], key: str):
-    with store._cursor() as cur:
-        cur.execute(
-            "SELECT expires_at FROM store WHERE prefix = %s AND key = %s",
-            (".".join(ns), key),
-        )
-        return cur.fetchone()["expires_at"]
-
-
-def test_omit_expired_filters_read_paths(store: PostgresStore) -> None:
-    store.stop_ttl_sweeper()  # deterministic: no background deletion
-    store.ttl_config["omit_expired"] = True
-
-    expired_ns = ("omit", "expired")
-    control_ns = ("omit", "control")
-    store.put(expired_ns, "e", {"data": "gone"}, ttl=TTL_MINUTES)
-    store.put(control_ns, "c", {"data": "keep"}, ttl=None)
-    _expire_now(store, expired_ns, "e")
-
-    # The row is expired but physically still present (unswept).
-    assert _row_exists(store, expired_ns, "e")
-
-    # get omits it; the never-expiring control is still returned.
-    assert store.get(expired_ns, "e") is None
-    assert store.get(control_ns, "c") is not None
-
-    # search omits it but returns the control.
-    assert store.search(expired_ns) == []
-    assert [i.key for i in store.search(control_ns)] == ["c"]
-
-    # list_namespaces drops the expired-only namespace, keeps the control.
-    namespaces = store.list_namespaces(prefix=("omit",))
-    assert expired_ns not in namespaces
-    assert control_ns in namespaces
-
-
-@pytest.mark.parametrize("omit", [None, False], ids=["default", "explicit-false"])
-def test_omit_expired_disabled_preserves_expired_rows(
-    store: PostgresStore, omit
-) -> None:
-    store.stop_ttl_sweeper()
-    if omit is not None:
-        store.ttl_config["omit_expired"] = omit
-
-    ns = ("keep",)
-    store.put(ns, "k", {"data": "still-here"}, ttl=TTL_MINUTES)
-    _expire_now(store, ns, "k")
-
-    assert store.get(ns, "k", refresh_ttl=False) is not None
-    assert [i.key for i in store.search(ns, refresh_ttl=False)] == ["k"]
-    assert ns in store.list_namespaces(prefix=("keep",))
-
-
-def test_omit_expired_refresh_ttl_only_refreshes_live_rows(
-    store: PostgresStore,
-) -> None:
-    store.stop_ttl_sweeper()
-    store.ttl_config["omit_expired"] = True
-
-    ns = ("refresh",)
-    store.put(ns, "expired", {"n": 0}, ttl=TTL_MINUTES)
-    store.put(ns, "live_get", {"n": 1}, ttl=TTL_MINUTES)
-    store.put(ns, "live_search", {"n": 2}, ttl=TTL_MINUTES)
-    _expire_now(store, ns, "expired")
-
-    expired_before = _stored_expires_at(store, ns, "expired")
-    get_before = _stored_expires_at(store, ns, "live_get")
-    search_before = _stored_expires_at(store, ns, "live_search")
-
-    # refresh_ttl=True must NOT resurrect the expired row (via get or search)...
-    assert store.get(ns, "expired", refresh_ttl=True) is None
-    assert "expired" not in [i.key for i in store.search(ns, refresh_ttl=True)]
-    assert _stored_expires_at(store, ns, "expired") == expired_before
-
-    # ...but must still extend the live rows that were read.
-    assert store.get(ns, "live_get", refresh_ttl=True) is not None
-    assert _stored_expires_at(store, ns, "live_get") > get_before
-    assert _stored_expires_at(store, ns, "live_search") > search_before
-
-
-def test_omit_expired_search_pagination(store: PostgresStore) -> None:
-    store.stop_ttl_sweeper()
-    store.ttl_config["omit_expired"] = True
-
-    ns = ("page",)
-    for k in ("a", "b", "c"):
-        store.put(ns, k, {"k": k}, ttl=TTL_MINUTES)
-    store.put(ns, "expired", {"k": "x"}, ttl=TTL_MINUTES)
-    _expire_now(store, ns, "expired")
-
-    seconds_ago = {"a": 1, "expired": 2, "b": 3, "c": 4}
-    # updated_at DESC orders these a, expired, b, c, so the expired row sits inside
-    # the first limit=2 window. Correct (pre-LIMIT) filtering yields live pages
-    # [a, b] then [c]; post-LIMIT filtering would underfill page 1 to just [a].
-    with store._cursor() as cur:
-        for key, secs in seconds_ago.items():
-            cur.execute(
-                "UPDATE store SET updated_at = NOW() - (%s * INTERVAL '1 second') "
-                "WHERE prefix = %s AND key = %s",
-                (secs, ".".join(ns), key),
-            )
-
-    page1 = store.search(ns, limit=2, offset=0)
-    page2 = store.search(ns, limit=2, offset=2)
-    assert [i.key for i in page1] == ["a", "b"]
-    assert [i.key for i in page2] == ["c"]
-
-
 @pytest.mark.parametrize(
     "vector_type,distance_type",
     [
@@ -1151,16 +899,3 @@ def test_non_ascii(
         assert result3[0].key == "3"
         assert result4[0].key == "4"
         assert result5[0].key == "5"
-
-
-def test_namespace_labels_with_trailing_newline(store) -> None:
-    """Labels may contain newlines, and must not match a differently-named label."""
-    store.put(("users", "alice"), "k", {"v": 1})
-    store.put(("users", "alice\n"), "k", {"v": 2})
-
-    assert set(store.list_namespaces(suffix=["alice"], limit=100)) == {
-        ("users", "alice"),
-    }
-    assert set(store.list_namespaces(prefix=["users", "alice"], limit=100)) == {
-        ("users", "alice"),
-    }

libs/checkpoint-postgres/uv.lock

@@ -17,16 +17,16 @@ wheels = [
 
 [[package]]
 name = "anyio"
-version = "4.14.2"
+version = "4.13.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
     { name = "idna" },
     { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/61/cc/a381afa6efea9f496eff839d4a6a1aed3bfafc7b3ab4b0d1b243a12573dd/anyio-4.14.2.tar.gz", hash = "sha256:cfa139f3ed1a23ee8f88a145ddb5ac7605b8bbfd8592baacd7ce3d8bb4313c7f", size = 260176, upload-time = "2026-07-12T20:29:07.082Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/19/14/2c5dd9f512b66549ae92767a9c7b330ae88e1932ca57876909410251fe13/anyio-4.13.0.tar.gz", hash = "sha256:334b70e641fd2221c1505b3890c69882fe4a2df910cba14d97019b90b24439dc", size = 231622, upload-time = "2026-03-24T12:59:09.671Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/da/35/f2287558c17e29fafc8ef3daf819bb9834061cfa43bff8014f7df7f63bdc/anyio-4.14.2-py3-none-any.whl", hash = "sha256:9f505dda5ac9f0c8309b5e8bd445a8c2bf7246f3ce950121e45ea15bc41d1494", size = 125813, upload-time = "2026-07-12T20:29:05.763Z" },
+    { url = "https://files.pythonhosted.org/packages/da/42/e921fccf5015463e32a3cf6ee7f980a6ed0f395ceeaa45060b61d86486c2/anyio-4.13.0-py3-none-any.whl", hash = "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708", size = 114353, upload-time = "2026-03-24T12:59:08.246Z" },
 ]
 
 [[package]]
@@ -138,11 +138,11 @@ wheels = [
 
 [[package]]
 name = "codespell"
-version = "2.4.3"
+version = "2.4.2"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/80/19/45e941380f69c042b43423513d201e6592346f992394347f5e7174c31407/codespell-2.4.3.tar.gz", hash = "sha256:cbe085e331227b37bb86ef8bddd08dc768c704ee9a07ca869852c093fa2793e2", size = 352773, upload-time = "2026-07-15T11:51:54.159Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/2d/9d/1d0903dff693160f893ca6abcabad545088e7a2ee0a6deae7c24e958be69/codespell-2.4.2.tar.gz", hash = "sha256:3c33be9ae34543807f088aeb4832dfad8cb2dae38da61cac0a7045dd376cfdf3", size = 352058, upload-time = "2026-03-05T18:10:42.936Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/8b/bf/bdb951d34eb169140b546f44be9ec4525d1acefb9eb5572071f5492b19fc/codespell-2.4.3-py3-none-any.whl", hash = "sha256:af2505b335e8573dbd2d384d1c4ef498f4006f4ba2d6fceca01e55b91f52628a", size = 340736, upload-time = "2026-07-15T11:51:52.925Z" },
+    { url = "https://files.pythonhosted.org/packages/42/a1/52fa05533e95fe45bcc09bcf8a503874b1c08f221a4e35608017e0938f55/codespell-2.4.2-py3-none-any.whl", hash = "sha256:97e0c1060cf46bd1d5db89a936c98db8c2b804e1fdd4b5c645e82a1ec6b1f886", size = 353715, upload-time = "2026-03-05T18:10:41.398Z" },
 ]
 
 [[package]]
@@ -159,7 +159,7 @@ name = "exceptiongroup"
 version = "1.3.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/50/79/66800aadf48771f6b62f7eb014e352e5d06856655206165d775e675a02c9/exceptiongroup-1.3.1.tar.gz", hash = "sha256:8b412432c6055b0b7d14c310000ae93352ed6754f70fa8f7c34141f91c4e3219", size = 30371, upload-time = "2025-11-21T23:01:54.787Z" }
 wheels = [
@@ -244,7 +244,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.5.2"
+version = "1.4.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -257,21 +257,21 @@ dependencies = [
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 version = "3.6.0"

libs/checkpoint-sqlite/README.md

@@ -1,26 +1,6 @@
 # LangGraph SQLite Checkpoint
 
-[![PyPI - Version](https://img.shields.io/pypi/v/langgraph-checkpoint-sqlite?label=%20)](https://pypi.org/project/langgraph-checkpoint-sqlite/#history)
-[![PyPI - License](https://img.shields.io/pypi/l/langgraph-checkpoint-sqlite)](https://opensource.org/licenses/MIT)
-[![PyPI - Downloads](https://img.shields.io/pepy/dt/langgraph-checkpoint-sqlite)](https://pypistats.org/packages/langgraph-checkpoint-sqlite)
-[![Twitter](https://img.shields.io/twitter/url/https/twitter.com/langchain_oss.svg?style=social&label=Follow%20%40LangChain)](https://x.com/langchain_oss)
-
-To help you ship LangGraph apps to production faster, check out [LangSmith](https://www.langchain.com/langsmith).
-[LangSmith](https://www.langchain.com/langsmith) is a unified developer platform for building, testing, and monitoring LLM applications.
-
-## Quick Install
-
-```bash
-uv add langgraph-checkpoint-sqlite
-```
-
-## 🤔 What is this?
-
-This library provides a SQLite implementation of LangGraph's checkpoint saver, with both sync and async support via `aiosqlite`. Use it when you want LangGraph state persistence backed by SQLite for local development, testing, or lightweight deployments.
-
-## 📖 Documentation
-
-For full documentation, see the [API reference](https://reference.langchain.com/python/langgraph.checkpoint.sqlite). For conceptual guides on persistence and memory, see the [LangGraph Docs](https://docs.langchain.com/oss/python/langgraph/overview).
+Implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via `aiosqlite`)
 
 ## Security
 
@@ -111,13 +91,3 @@ async with AsyncSqliteSaver.from_conn_string(":memory:") as checkpointer:
     # list checkpoints
     [c async for c in checkpointer.alist(read_config)]
 ```
-
-## 📕 Releases & Versioning
-
-See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning](https://docs.langchain.com/oss/python/versioning) policies.
-
-## 💁 Contributing
-
-As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
-
-For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview).

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

@@ -77,7 +77,7 @@ class SqliteSaver(BaseCheckpointSaver[str]):
         >>> result = graph.invoke(3, config)
         >>> graph.get_state(config)
         StateSnapshot(values=4, next=(), config={'configurable': {'thread_id': '1', 'checkpoint_ns': '', 'checkpoint_id': '0c62ca34-ac19-445d-bbb0-5b4984975b2a'}}, parent_config=None)
-    """
+    """  # noqa
 
     conn: sqlite3.Connection
     is_setup: bool
@@ -222,7 +222,7 @@ class SqliteSaver(BaseCheckpointSaver[str]):
             >>> checkpoint_tuple = memory.get_tuple(config)
             >>> print(checkpoint_tuple)
             CheckpointTuple(...)
-        """
+        """  # noqa
         checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
         with self.cursor(transaction=False) as cur:
             # find the latest checkpoint for the thread_id

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

@@ -212,7 +212,7 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
         while True:
             try:
                 yield asyncio.run_coroutine_threadsafe(
-                    anext(aiter_),  # type: ignore[arg-type]
+                    anext(aiter_),  # type: ignore[arg-type]  # noqa: F821
                     self.loop,
                 ).result()
             except StopAsyncIteration:

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

@@ -24,13 +24,11 @@ from langgraph.store.base.batch import AsyncBatchedBaseStore
 
 from langgraph.store.sqlite.base import (
     _PLACEHOLDER,
-    NS_MATCH_FUNCTION,
     BaseSqliteStore,
     SqliteIndexConfig,
     _decode_ns_text,
     _ensure_index_config,
     _group_ops,
-    _namespace_match,
     _row_to_item,
     _row_to_search_item,
 )
@@ -152,13 +150,6 @@ class AsyncSqliteStore(AsyncBatchedBaseStore, BaseSqliteStore):
             if self.is_setup:
                 return
 
-            # list_namespaces needs segment-aware matching, which SQLite cannot
-            # express in LIKE or GLOB. Registered here rather than in __init__
-            # because aiosqlite's create_function is a coroutine.
-            await self.conn.create_function(
-                NS_MATCH_FUNCTION, 2, _namespace_match, deterministic=True
-            )
-
             # Create migrations table if it doesn't exist
             await self.conn.execute(
                 """

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

@@ -93,74 +93,12 @@ class SqliteIndexConfig(IndexConfig):
     pass
 
 
-NS_MATCH_FUNCTION = "_langgraph_namespace_match"
-"""SQLite user function backing segment-aware namespace matching.
-
-Registered under a private name rather than overriding `REGEXP`, so a caller's
-own `REGEXP` is left untouched.
-"""
-
-
-def _namespace_match(prefix: str | None, pattern: str) -> int:
-    """Backing implementation of `NS_MATCH_FUNCTION`."""
-    if prefix is None:
-        return 0
-    return 1 if re.search(pattern, prefix) else 0
-
-
-def _escape_glob_literal(text: str) -> str:
-    """Escape GLOB metacharacters so `text` is matched literally.
-
-    GLOB has no `ESCAPE` clause, so metacharacters are wrapped in a character
-    class instead. `]` is literal outside a class and needs no escaping.
-    """
-    return text.replace("[", "[[]").replace("*", "[*]").replace("?", "[?]")
-
-
-def _namespace_prefix_condition(
-    namespace_prefix: tuple[str, ...], column: str = "prefix"
-) -> tuple[str, tuple[str, ...]]:
-    """Build the SQL scoping a search to a namespace and its descendants.
-
-    Matches the namespace exactly or requires the `.` separator before any
-    remainder, so a prefix of `("foo",)` does not also match `("foobar",)`.
-
-    Uses GLOB rather than LIKE because SQLite's LIKE is case-insensitive for
-    ASCII, which would match `("FOO",)` for a prefix of `("foo",)` even though
-    `get`/`put`/`delete` compare with `=` and treat those as distinct.
-
-    An empty prefix is unconstrained and matches every namespace.
-    """
-    if not namespace_prefix:
-        return "TRUE", ()
-    path = _namespace_to_text(namespace_prefix)
-    condition = f"({column} = ? OR {column} GLOB ?)"
-    return condition, (path, f"{_escape_glob_literal(path)}.*")
-
-
-def _namespace_match_pattern(path: tuple[str, ...], match_type: str) -> str:
-    """Build a regex matching the dot-joined prefix on whole namespace segments.
-
-    Needed because neither LIKE nor GLOB can express "any character except the
-    separator": GLOB has character classes but no quantifier, so `[^.]*` still
-    crosses `.`. Matches how `InMemoryStore` compares namespaces element-wise.
-
-    `*` matches exactly one segment. Prefix matches stay open-ended but must end
-    on a separator; suffix matches anchor at the end and begin on one.
-
-    Examples:
-        prefix ("uid", "*", "alice") -> ^uid\\.[^.]+\\.alice(\\.|\\Z)
-        suffix ("alice",)            -> (^|\\.)alice\\Z
-    """
-    segments = ("[^.]+" if part == "*" else re.escape(part) for part in path)
-    body = r"\.".join(segments)
-    if match_type == "suffix":
-        return rf"(^|\.){body}\Z"
-    return rf"^{body}(\.|\Z)"
-
-
-def _namespace_to_text(namespace: tuple[str, ...]) -> str:
+def _namespace_to_text(
+    namespace: tuple[str, ...], handle_wildcards: bool = False
+) -> str:
     """Convert namespace tuple to text string."""
+    if handle_wildcards:
+        namespace = tuple("%" if val == "*" else val for val in namespace)
     return ".".join(namespace)
 
 
@@ -523,11 +461,8 @@ class BaseSqliteStore:
                     else " AND " + " AND ".join(filter_conditions)
                 )
                 if op.namespace_prefix:
-                    ns_condition, ns_args_tuple = _namespace_prefix_condition(
-                        op.namespace_prefix, column="s.prefix"
-                    )
-                    prefix_filter_str = f"WHERE {ns_condition} {filter_str} "
-                    ns_args: Sequence = ns_args_tuple
+                    prefix_filter_str = f"WHERE s.prefix LIKE ? {filter_str} "
+                    ns_args: Sequence = (f"{_namespace_to_text(op.namespace_prefix)}%",)
                 else:
                     ns_args = ()
                     if filter_str:
@@ -568,15 +503,12 @@ class BaseSqliteStore:
                 ]
             # Regular search branch (no vector search)
             else:
-                ns_condition, ns_args_tuple = _namespace_prefix_condition(
-                    op.namespace_prefix
-                )
-                base_query = f"""
+                base_query = """
                     SELECT prefix, key, value, created_at, updated_at, expires_at, ttl_minutes, NULL as score
                     FROM store
-                    WHERE {ns_condition}
+                    WHERE prefix LIKE ?
                 """
-                params = list(ns_args_tuple)
+                params = [f"{_namespace_to_text(op.namespace_prefix)}%"]
 
                 if filter_conditions:
                     params.extend(filter_params)
@@ -617,28 +549,16 @@ class BaseSqliteStore:
 
             if op.match_conditions:
                 for cond in op.match_conditions:
-                    if cond.match_type in ("prefix", "suffix"):
-                        if not cond.path:
-                            # An empty path constrains nothing; skipping keeps it a
-                            # no-op rather than emitting a pattern that matches no
-                            # namespace at all.
-                            continue
-                        if cond.match_type == "prefix" and "*" not in cond.path:
-                            # Equivalent to the anchored pattern, but SQLite can
-                            # satisfy `=` and a trailing-wildcard GLOB from
-                            # store_prefix_idx. The user function is opaque to the
-                            # planner, so it would scan every row and call back
-                            # into Python for each one.
-                            condition, args = _namespace_prefix_condition(
-                                tuple(cond.path)
-                            )
-                            where_clauses.append(condition)
-                            params.extend(args)
-                        else:
-                            where_clauses.append(f"{NS_MATCH_FUNCTION}(prefix, ?) = 1")
-                            params.append(
-                                _namespace_match_pattern(cond.path, cond.match_type)
-                            )
+                    if cond.match_type == "prefix":
+                        where_clauses.append("prefix LIKE ?")
+                        params.append(
+                            f"{_namespace_to_text(cond.path, handle_wildcards=True)}%"
+                        )
+                    elif cond.match_type == "suffix":
+                        where_clauses.append("prefix LIKE ?")
+                        params.append(
+                            f"%{_namespace_to_text(cond.path, handle_wildcards=True)}"
+                        )
                     else:
                         logger.warning(
                             "Unknown match_type in list_namespaces: %s", cond.match_type
@@ -865,9 +785,6 @@ class SqliteStore(BaseSqliteStore, BaseStore):
         super().__init__()
         self._deserializer = deserializer
         self.conn = conn
-        # Registered here rather than in from_conn_string so a caller-supplied
-        # connection also gets it.
-        conn.create_function(NS_MATCH_FUNCTION, 2, _namespace_match, deterministic=True)
         self.lock = threading.Lock()
         self.is_setup = False
         self.index_config = index

libs/checkpoint-sqlite/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint-sqlite"
-version = "3.1.1"
+version = "3.1.0"
 description = "Library with a SQLite implementation of LangGraph checkpoint saver."
 authors = []
 requires-python = ">=3.10"
@@ -30,7 +30,6 @@ test = [
   "pytest-mock",
   "pytest-watcher",
   "langgraph-checkpoint",
-  "langgraph-checkpoint-conformance",
   "pytest-retry>=1.7.0",
 ]
 lint = [
@@ -48,7 +47,6 @@ default-groups = ['dev']
 
 [tool.uv.sources]
 langgraph-checkpoint = { path = "../checkpoint", editable = true }
-langgraph-checkpoint-conformance = { path = "../checkpoint-conformance", editable = true }
 
 [tool.hatch.build.targets.wheel]
 include = ["langgraph"]
@@ -64,8 +62,6 @@ lint.select = [
   "UP", # pyupgrade
   "B",  # flake8-bugbear
   "I",  # isort
-  "PLC0415",  # import-outside-top-level
-  "RUF100",  # unused noqa directive
   "UP", # pyupgrade
 ]
 lint.ignore = ["E501", "B008"]

libs/checkpoint-sqlite/tests/test_async_store.py

@@ -716,32 +716,3 @@ async def test_search_items(
         for ns in test_namespaces:
             key = f"item_{ns[-1]}"
             await store.adelete(ns, key)
-
-
-async def test_async_namespace_segment_boundary(store: AsyncSqliteStore) -> None:
-    """Segment-aware scoping on the async path.
-
-    Also covers that the namespace-match SQLite function is registered on the
-    async connection -- aiosqlite's create_function is a coroutine, so it is
-    registered in setup() rather than __init__.
-    """
-    for namespace in [
-        ("foo",),
-        ("foo", "child"),
-        ("foobar",),
-        ("uid", "users", "alice"),
-        ("uid", "users", "malice"),
-        ("user_1",),
-        ("userX1",),
-    ]:
-        await store.aput(namespace, "k", {"v": 1})
-
-    found = {item.namespace for item in await store.asearch(("foo",), limit=100)}
-    assert found == {("foo",), ("foo", "child")}
-
-    found = {item.namespace for item in await store.asearch(("user_1",), limit=100)}
-    assert found == {("user_1",)}
-
-    assert set(await store.alist_namespaces(suffix=["alice"], limit=100)) == {
-        ("uid", "users", "alice"),
-    }

libs/checkpoint-sqlite/tests/test_conformance_delta.py

@@ -3,14 +3,21 @@
 from __future__ import annotations
 
 import pytest
-from langgraph.checkpoint.conformance import validate
-from langgraph.checkpoint.conformance.initializer import checkpointer_test
 
-from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
+pytest.importorskip(
+    "langgraph.checkpoint.conformance",
+    reason="langgraph-checkpoint-conformance not installed",
+)
+pytest.importorskip("aiosqlite", reason="aiosqlite not installed")
 
 
 @pytest.mark.asyncio
 async def test_delta_channel_conformance():
+    from langgraph.checkpoint.conformance import validate
+    from langgraph.checkpoint.conformance.initializer import checkpointer_test
+
+    from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
+
     @checkpointer_test(name="AsyncSqliteSaver")
     async def sqlite_saver():
         async with AsyncSqliteSaver.from_conn_string(":memory:") as saver:

libs/checkpoint-sqlite/tests/test_delta_channel_migration.py

@@ -29,13 +29,13 @@ pytest.importorskip("langgraph.channels.delta", reason="langgraph core not insta
 pytest.importorskip("langgraph.channels.binop", reason="langgraph core not installed")
 pytest.importorskip("langgraph.graph", reason="langgraph core not installed")
 
-from langgraph.channels.binop import BinaryOperatorAggregate  # type: ignore[import-untyped]  # noqa: I001
-from langgraph.channels.delta import DeltaChannel  # type: ignore[import-untyped]
-from langgraph.graph import END, START, StateGraph  # type: ignore[import-untyped]
-from typing_extensions import TypedDict
+from langgraph.channels.binop import BinaryOperatorAggregate  # type: ignore[import-untyped]  # noqa: E402,I001
+from langgraph.channels.delta import DeltaChannel  # type: ignore[import-untyped]  # noqa: E402
+from langgraph.graph import END, START, StateGraph  # type: ignore[import-untyped]  # noqa: E402
+from typing_extensions import TypedDict  # noqa: E402
 
-from langgraph.checkpoint.sqlite import SqliteSaver
-from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
+from langgraph.checkpoint.sqlite import SqliteSaver  # noqa: E402
+from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver  # noqa: E402
 
 pytestmark = pytest.mark.anyio
 

libs/checkpoint-sqlite/tests/test_get_delta_channel_history.py

@@ -32,13 +32,13 @@ from langchain_core.runnables import RunnableConfig
 pytest.importorskip("langgraph.channels.delta", reason="langgraph core not installed")
 pytest.importorskip("langgraph.graph", reason="langgraph core not installed")
 
-from langgraph.channels.delta import DeltaChannel  # type: ignore[import-untyped]  # noqa: I001
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
-from langgraph.graph import END, START, StateGraph  # type: ignore[import-untyped]
-from typing_extensions import TypedDict
+from langgraph.channels.delta import DeltaChannel  # type: ignore[import-untyped]  # noqa: E402,I001
+from langgraph.checkpoint.serde.types import _DeltaSnapshot  # noqa: E402
+from langgraph.graph import END, START, StateGraph  # type: ignore[import-untyped]  # noqa: E402
+from typing_extensions import TypedDict  # noqa: E402
 
-from langgraph.checkpoint.sqlite import SqliteSaver
-from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
+from langgraph.checkpoint.sqlite import SqliteSaver  # noqa: E402
+from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver  # noqa: E402
 
 pytestmark = pytest.mark.anyio
 

libs/checkpoint-sqlite/tests/test_store.py

@@ -1,11 +1,7 @@
-import math
 import os
-import random
 import re
 import tempfile
-import time
 import uuid
-from collections import Counter, defaultdict
 from collections.abc import Generator, Iterable
 from contextlib import contextmanager
 from typing import Any, Literal, cast
@@ -22,13 +18,7 @@ from langgraph.store.base import (
 )
 
 from langgraph.store.sqlite import SqliteStore
-from langgraph.store.sqlite.base import (
-    NS_MATCH_FUNCTION,
-    BaseSqliteStore,
-    SqliteIndexConfig,
-    _escape_glob_literal,
-    _namespace_match_pattern,
-)
+from langgraph.store.sqlite.base import SqliteIndexConfig
 
 
 # Local embeddings implementation for testing vector search
@@ -37,6 +27,10 @@ class CharacterEmbeddings(Embeddings):
 
     def __init__(self, dims: int = 50, seed: int = 42):
         """Initialize with embedding dimensions and random seed."""
+        import math
+        import random
+        from collections import defaultdict
+
         self._rng = random.Random(seed)
         self.dims = dims
         # Create projection vector for each character lazily
@@ -48,6 +42,9 @@ class CharacterEmbeddings(Embeddings):
 
     def _embed_one(self, text: str) -> list[float]:
         """Embed a single text."""
+        import math
+        from collections import Counter
+
         counts = Counter(text)
         total = sum(counts.values())
 
@@ -335,6 +332,8 @@ class TestSqliteStore:
 
             # Test update
             # Small delay to ensure the updated timestamp is different
+            import time
+
             time.sleep(0.01)
 
             updated_value = {"title": "Updated Document", "content": "Hello, Updated!"}
@@ -1230,208 +1229,3 @@ def test_non_ascii(
         assert result3[0].key == "3"
         assert result4[0].key == "4"
         assert result5[0].key == "5"
-
-
-def test_escape_glob_literal() -> None:
-    assert _escape_glob_literal("users.alice") == "users.alice"
-    # "_" and "%" are LIKE wildcards but literal in GLOB, so they are left alone.
-    assert _escape_glob_literal("user_1") == "user_1"
-    assert _escape_glob_literal("100%") == "100%"
-    assert _escape_glob_literal("a*b") == "a[*]b"
-    assert _escape_glob_literal("a?b") == "a[?]b"
-    assert _escape_glob_literal("a[b") == "a[[]b"
-
-
-def test_namespace_match_pattern() -> None:
-    assert _namespace_match_pattern(("foo",), "prefix") == r"^foo(\.|\Z)"
-    assert (
-        _namespace_match_pattern(("uid", "*", "alice"), "prefix")
-        == r"^uid\.[^.]+\.alice(\.|\Z)"
-    )
-    assert _namespace_match_pattern(("alice",), "suffix") == r"(^|\.)alice\Z"
-
-
-def test_search_namespace_segment_boundary(store: SqliteStore) -> None:
-    """Prefix scoping must stop at namespace segment boundaries.
-
-    Namespaces are stored dot-joined, so matching the raw text also returns
-    siblings sharing leading characters.
-    """
-    for namespace in [
-        ("foo",),
-        ("foo", "child"),
-        ("foo", "child", "deep"),
-        ("foobar",),
-        ("foobar", "baz"),
-        ("foo2",),
-    ]:
-        store.put(namespace, "k", {"v": 1})
-
-    def _namespaces(prefix: tuple[str, ...]) -> set[tuple[str, ...]]:
-        return {item.namespace for item in store.search(prefix, limit=100)}
-
-    assert _namespaces(("foo",)) == {
-        ("foo",),
-        ("foo", "child"),
-        ("foo", "child", "deep"),
-    }
-    # The sibling scope is independent, not merely narrower.
-    assert _namespaces(("foobar",)) == {("foobar",), ("foobar", "baz")}
-    assert _namespaces(("foo2",)) == {("foo2",)}
-    assert _namespaces(("fo",)) == set()
-
-
-def test_search_namespace_wildcard_chars_are_literal(store: SqliteStore) -> None:
-    """LIKE and GLOB metacharacters in labels must be matched literally."""
-    for namespace in [
-        ("user_1",),
-        ("user_1", "child"),
-        ("userX1",),
-        ("a%b",),
-        ("axxb",),
-        ("star*",),
-        ("starX",),
-    ]:
-        store.put(namespace, "k", {"v": 1})
-
-    def _namespaces(prefix: tuple[str, ...]) -> set[tuple[str, ...]]:
-        return {item.namespace for item in store.search(prefix, limit=100)}
-
-    # Also asserts each namespace still matches itself, which catches escaping
-    # the equality arm by mistake.
-    assert _namespaces(("user_1",)) == {("user_1",), ("user_1", "child")}
-    assert _namespaces(("a%b",)) == {("a%b",)}
-    assert _namespaces(("star*",)) == {("star*",)}
-
-
-def test_search_namespace_is_case_sensitive(store: SqliteStore) -> None:
-    """Search must agree with get/put, which compare namespaces with `=`.
-
-    SQLite's LIKE is case-insensitive for ASCII, so matching with it conflated
-    namespaces that every other operation treats as distinct.
-    """
-    store.put(("Foo",), "k", {"v": "upper"})
-    store.put(("foo",), "k", {"v": "lower"})
-
-    assert {item.namespace for item in store.search(("foo",), limit=100)} == {("foo",)}
-    assert {item.namespace for item in store.search(("Foo",), limit=100)} == {("Foo",)}
-
-
-def test_list_namespaces_segment_boundary(store: SqliteStore) -> None:
-    for namespace in [
-        ("foo",),
-        ("foo", "child"),
-        ("foobar",),
-        ("foobar", "baz"),
-        ("uid", "users", "alice"),
-        ("uid", "users", "malice"),
-        ("uid", "a", "b", "alice"),
-    ]:
-        store.put(namespace, "k", {"v": 1})
-
-    assert set(store.list_namespaces(prefix=["foo"], limit=100)) == {
-        ("foo",),
-        ("foo", "child"),
-    }
-    # Suffix must align to a segment: "malice" does not end with the "alice"
-    # segment.
-    assert set(store.list_namespaces(suffix=["alice"], limit=100)) == {
-        ("uid", "users", "alice"),
-        ("uid", "a", "b", "alice"),
-    }
-    # "*" spans exactly one segment.
-    assert set(store.list_namespaces(prefix=["uid", "*", "alice"], limit=100)) == {
-        ("uid", "users", "alice"),
-    }
-    # Prefix matching stays open-ended across depth.
-    assert set(store.list_namespaces(prefix=["uid"], limit=100)) == {
-        ("uid", "users", "alice"),
-        ("uid", "users", "malice"),
-        ("uid", "a", "b", "alice"),
-    }
-
-
-def test_search_empty_prefix_is_unconstrained(store: SqliteStore) -> None:
-    """An empty prefix constrains nothing and must return every namespace."""
-    for namespace in [("a",), ("b", "c"), ("d", "e", "f")]:
-        store.put(namespace, "k", {"v": 1})
-
-    assert {item.namespace for item in store.search((), limit=100)} == {
-        ("a",),
-        ("b", "c"),
-        ("d", "e", "f"),
-    }
-
-
-def test_namespace_labels_with_trailing_newline(store: SqliteStore) -> None:
-    """Labels may contain newlines, and must not match a differently-named label.
-
-    Python's `$` also matches just before a trailing newline, so the patterns use
-    `\\Z` to anchor at the true end of the string.
-    """
-    store.put(("users", "alice"), "k", {"v": 1})
-    store.put(("users", "alice\n"), "k", {"v": 2})
-
-    assert set(store.list_namespaces(suffix=["alice"], limit=100)) == {
-        ("users", "alice"),
-    }
-    assert set(store.list_namespaces(prefix=["users", "alice"], limit=100)) == {
-        ("users", "alice"),
-    }
-
-
-def test_list_namespaces_prefix_uses_indexable_condition() -> None:
-    """Plain prefixes must use the indexable condition, not the match function.
-
-    A user function is opaque to the query planner, so it scans every row and
-    calls back into Python for each one. Only suffix and wildcard paths, which
-    no SQLite operator can express, need it.
-    """
-    store = BaseSqliteStore()
-
-    def where(match_type: str, path: tuple[str, ...]) -> str:
-        op = ListNamespacesOp(
-            match_conditions=(MatchCondition(match_type=match_type, path=path),),
-            max_depth=None,
-            limit=10,
-            offset=0,
-        )
-        query, _ = store._get_batch_list_namespaces_queries([(0, op)])[0]
-        return " ".join(query.split())
-
-    assert "GLOB" in where("prefix", ("uid", "users"))
-    assert NS_MATCH_FUNCTION not in where("prefix", ("uid", "users"))
-    # A label that merely contains "*" is not the wildcard.
-    assert "GLOB" in where("prefix", ("star*",))
-    # Wildcard and suffix cannot be expressed by GLOB, so they keep the function.
-    assert NS_MATCH_FUNCTION in where("prefix", ("uid", "*", "alice"))
-    assert NS_MATCH_FUNCTION in where("suffix", ("alice",))
-
-
-def test_list_namespaces_metacharacter_labels(store: SqliteStore) -> None:
-    """Metacharacters in labels are literal on both matching paths.
-
-    Plain prefixes take the `= OR GLOB` condition and wildcard/suffix paths take
-    the regex function, so escaping has to hold in two different syntaxes.
-    """
-    pairs = [
-        ("star*", "starX"),
-        ("q?m", "qXm"),
-        ("br[ack]et", "brXacXket"),
-        ("user_1", "userX1"),
-        ("a%b", "axxb"),
-        ("plus+", "plusX"),
-    ]
-    for label, decoy in pairs:
-        store.put((label,), "k", {"v": 1})
-        store.put((decoy,), "k", {"v": 1})
-        store.put((label, "child"), "k", {"v": 1})
-
-    for label, decoy in pairs:
-        found = set(store.list_namespaces(prefix=[label], limit=100))
-        assert found == {(label,), (label, "child")}
-        # The decoy differs only where the metacharacter would have matched.
-        assert (decoy,) not in found
-        assert set(store.list_namespaces(prefix=[label, "child"], limit=100)) == {
-            (label, "child"),
-        }

libs/checkpoint-sqlite/uv.lock

@@ -147,11 +147,11 @@ wheels = [
 
 [[package]]
 name = "codespell"
-version = "2.4.3"
+version = "2.4.2"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/80/19/45e941380f69c042b43423513d201e6592346f992394347f5e7174c31407/codespell-2.4.3.tar.gz", hash = "sha256:cbe085e331227b37bb86ef8bddd08dc768c704ee9a07ca869852c093fa2793e2", size = 352773, upload-time = "2026-07-15T11:51:54.159Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/2d/9d/1d0903dff693160f893ca6abcabad545088e7a2ee0a6deae7c24e958be69/codespell-2.4.2.tar.gz", hash = "sha256:3c33be9ae34543807f088aeb4832dfad8cb2dae38da61cac0a7045dd376cfdf3", size = 352058, upload-time = "2026-03-05T18:10:42.936Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/8b/bf/bdb951d34eb169140b546f44be9ec4525d1acefb9eb5572071f5492b19fc/codespell-2.4.3-py3-none-any.whl", hash = "sha256:af2505b335e8573dbd2d384d1c4ef498f4006f4ba2d6fceca01e55b91f52628a", size = 340736, upload-time = "2026-07-15T11:51:52.925Z" },
+    { url = "https://files.pythonhosted.org/packages/42/a1/52fa05533e95fe45bcc09bcf8a503874b1c08f221a4e35608017e0938f55/codespell-2.4.2-py3-none-any.whl", hash = "sha256:97e0c1060cf46bd1d5db89a936c98db8c2b804e1fdd4b5c645e82a1ec6b1f886", size = 353715, upload-time = "2026-03-05T18:10:41.398Z" },
 ]
 
 [[package]]
@@ -168,7 +168,7 @@ name = "exceptiongroup"
 version = "1.3.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "typing-extensions" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/50/79/66800aadf48771f6b62f7eb014e352e5d06856655206165d775e675a02c9/exceptiongroup-1.3.1.tar.gz", hash = "sha256:8b412432c6055b0b7d14c310000ae93352ed6754f70fa8f7c34141f91c4e3219", size = 30371, upload-time = "2025-11-21T23:01:54.787Z" }
 wheels = [
@@ -253,7 +253,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.5.2"
+version = "1.4.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -266,21 +266,21 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/6e/58/3ad53096eee1e07728e8219ded30ae308b0f2b8b7b26b8ebb6371917c0f5/langchain_core-1.5.2.tar.gz", hash = "sha256:2d13ab35b42eec63d4669a483776b8cdd778ee764107149369fb369d84c08c41", size = 972322, upload-time = "2026-07-28T16:38:37.977Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/59/de/679a53472c25860837e32c0442c962fa86e95317a36460e2c9d5c91b17c2/langchain_core-1.4.0.tar.gz", hash = "sha256:1dc341eed802ed9c117c0df3923c991e5e9e226571e5725c194eeb5bd93d1a7f", size = 920260, upload-time = "2026-05-11T18:42:35.919Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/ca/e4/024e402a65f5ee2eb6ae9667b5ffc5f08776cb4e712f5a11ee1997d56083/langchain_core-1.5.2-py3-none-any.whl", hash = "sha256:a687dd7c3b22c6c1294e1c1eeb61fb6f3a308e6015a1d75b576b3836ad5b5aed", size = 561643, upload-time = "2026-07-28T16:38:36.38Z" },
+    { url = "https://files.pythonhosted.org/packages/0f/1a/86c38c27b81913a1c6c12448cab55defb5a1097c7dc9a4cea83f55477a2d/langchain_core-1.4.0-py3-none-any.whl", hash = "sha256:23cbbdb46e38ddd1dd5247e6167e96013eae74bea4c5949c550809970a9e565c", size = 548120, upload-time = "2026-05-11T18:42:33.992Z" },
 ]
 
 [[package]]
 name = "langchain-protocol"
-version = "0.0.18"
+version = "0.0.15"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/d2/59/b5959aea96faa9146e2e49a7a22882b3528c62efafe9a6a95beab30c2305/langchain_protocol-0.0.18.tar.gz", hash = "sha256:ec3e11782f1ed0c9db38e5a9ed01b0e7a0d3fba406faa8aef6594b73c56a63e6", size = 6150, upload-time = "2026-06-18T17:08:26.959Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/4f/24/9777489d6fbbee64af0c8f96d4f840239c408cf694f3394672807dafc490/langchain_protocol-0.0.15.tar.gz", hash = "sha256:9ab2d11ee73944754f10e037e717098d3a6796f0e58afa9cadda6154e7655ade", size = 5862, upload-time = "2026-05-01T22:30:04.748Z" }
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+    { url = "https://files.pythonhosted.org/packages/1d/7a/9c97a7b9cbe4c5dc6a44cdb1545450c28f0c8ce89b9c1f0ee7fbad896263/langchain_protocol-0.0.15-py3-none-any.whl", hash = "sha256:461eb794358f83d5e42635a5797799ffec7b4702314e34edf73ac21e75d3ef79", size = 6982, upload-time = "2026-05-01T22:30:03.877Z" },
 ]
 
 [[package]]
@@ -331,36 +331,9 @@ test = [
     { name = "redis" },
 ]
 
-[[package]]
-name = "langgraph-checkpoint-conformance"
-version = "0.0.2"
-source = { editable = "../checkpoint-conformance" }
-dependencies = [
-    { name = "langgraph-checkpoint" },
-]
-
-[package.metadata]
-requires-dist = [{ name = "langgraph-checkpoint", editable = "../checkpoint" }]
-
-[package.metadata.requires-dev]
-dev = [
-    { name = "pytest" },
-    { name = "pytest-asyncio" },
-    { name = "ruff" },
-    { name = "ty" },
-]
-lint = [
-    { name = "ruff" },
-    { name = "ty" },
-]
-test = [
-    { name = "pytest" },
-    { name = "pytest-asyncio" },
-]
-
 [[package]]
 name = "langgraph-checkpoint-sqlite"
-version = "3.1.1"
+version = "3.1.0"
 source = { editable = "." }
 dependencies = [
     { name = "aiosqlite" },
@@ -372,7 +345,6 @@ dependencies = [
 dev = [
     { name = "codespell" },
     { name = "langgraph-checkpoint" },
-    { name = "langgraph-checkpoint-conformance" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -388,7 +360,6 @@ lint = [
 ]
 test = [
     { name = "langgraph-checkpoint" },
-    { name = "langgraph-checkpoint-conformance" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -407,7 +378,6 @@ requires-dist = [
 dev = [
     { name = "codespell" },
     { name = "langgraph-checkpoint", editable = "../checkpoint" },
-    { name = "langgraph-checkpoint-conformance", editable = "../checkpoint-conformance" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -423,7 +393,6 @@ lint = [
 ]
 test = [
     { name = "langgraph-checkpoint", editable = "../checkpoint" },
-    { name = "langgraph-checkpoint-conformance", editable = "../checkpoint-conformance" },
     { name = "pytest" },
     { name = "pytest-asyncio" },
     { name = "pytest-mock" },
@@ -433,7 +402,7 @@ test = [
 
 [[package]]
 name = "langsmith"
-version = "0.8.18"
+version = "0.8.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "httpx" },
@@ -443,13 +412,12 @@ dependencies = [
     { name = "requests" },
     { name = "requests-toolbelt" },
     { name = "uuid-utils" },
-    { name = "websockets" },
     { name = "xxhash" },
     { name = "zstandard" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/a8/64/95f1f013531395f4e8ed73caeee780f65c7c58fe028cb543f8937b45611b/langsmith-0.8.0.tar.gz", hash = "sha256:59fe5b2a56bbbe14a08aa76691f84b49e8675dd21e11b57d80c6db8c08bac2e3", size = 4432996, upload-time = "2026-04-30T22:13:07.341Z" }
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 [[package]]
@@ -751,7 +719,7 @@ wheels = [
 
 [[package]]
 name = "pytest"
-version = "9.1.1"
+version = "9.0.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
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@@ -762,9 +730,9 @@ dependencies = [
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 ]
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 name = "xxhash"
 version = "3.6.0"

libs/checkpoint/README.md

@@ -1,26 +1,6 @@
 # LangGraph Checkpoint
 
-[![PyPI - Version](https://img.shields.io/pypi/v/langgraph-checkpoint?label=%20)](https://pypi.org/project/langgraph-checkpoint/#history)
-[![PyPI - License](https://img.shields.io/pypi/l/langgraph-checkpoint)](https://opensource.org/licenses/MIT)
-[![PyPI - Downloads](https://img.shields.io/pepy/dt/langgraph-checkpoint)](https://pypistats.org/packages/langgraph-checkpoint)
-[![Twitter](https://img.shields.io/twitter/url/https/twitter.com/langchain_oss.svg?style=social&label=Follow%20%40LangChain)](https://x.com/langchain_oss)
-
-To help you ship LangGraph apps to production faster, check out [LangSmith](https://www.langchain.com/langsmith).
-[LangSmith](https://www.langchain.com/langsmith) is a unified developer platform for building, testing, and monitoring LLM applications.
-
-## Quick Install
-
-```bash
-uv add langgraph-checkpoint
-```
-
-## 🤔 What is this?
-
-This library defines the base interface for LangGraph checkpointers. Checkpointers provide a persistence layer for LangGraph: they save graph state at every superstep, enabling human-in-the-loop, memory between interactions, durable execution, and more.
-
-## 📖 Documentation
-
-For full documentation, see the [API reference](https://reference.langchain.com/python/langgraph.checkpoint). For conceptual guides on persistence and memory, see the [LangGraph Docs](https://docs.langchain.com/oss/python/langgraph/overview).
+This library defines the base interface for LangGraph checkpointers. Checkpointers provide a persistence layer for LangGraph. They allow you to interact with and manage the graph's state. When you use a graph with a checkpointer, the checkpointer saves a _checkpoint_ of the graph state at every superstep, enabling several powerful capabilities like human-in-the-loop, "memory" between interactions and more.
 
 ## Key concepts
 
@@ -44,7 +24,7 @@ You must pass these when invoking the graph as part of the configurable part of
 
 ### Serde
 
-`langgraph-checkpoint` also defines protocol for serialization/deserialization (serde) and provides a default implementation (`langgraph.checkpoint.serde.jsonplus.JsonPlusSerializer`) that handles a wide variety of types, including LangChain and LangGraph primitives, datetimes, enums and more.
+`langgraph_checkpoint` also defines protocol for serialization/deserialization (serde) and provides an default implementation (`langgraph.checkpoint.serde.jsonplus.JsonPlusSerializer`) that handles a wide variety of types, including LangChain and LangGraph primitives, datetimes, enums and more.
 
 > [!IMPORTANT]
 > **Checkpoint deserialization security:** By default the serializer allows any Python type found in checkpoint data. New applications should set the environment variable `LANGGRAPH_STRICT_MSGPACK=true` or pass an explicit `allowed_msgpack_modules` list to `JsonPlusSerializer` to restrict deserialization to known-safe types.
@@ -109,13 +89,3 @@ checkpointer.get(read_config)
 # list checkpoints
 list(checkpointer.list(read_config))
 ```
-
-## 📕 Releases & Versioning
-
-See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning](https://docs.langchain.com/oss/python/versioning) policies.
-
-## 💁 Contributing
-
-As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
-
-For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview).

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

@@ -552,14 +552,6 @@ class TTLConfig(TypedDict, total=False):
     This can be overridden per-operation by explicitly setting `refresh_ttl`.
     Defaults to `True` if not configured.
     """
-    omit_expired: bool
-    """Whether to omit expired items from read operations.
-
-    If `True`, and if the store supports this option, expired items will not be
-    returned by `GET` or `SEARCH`, or included in namespace listings, even before
-    a TTL sweep deletes them.
-    Defaults to `False` if not configured.
-    """
     default_ttl: float | None
     """Default TTL (time-to-live) in minutes for new items.
     

libs/checkpoint/pyproject.toml

@@ -59,15 +59,9 @@ lint.select = [
   "UP", # pyupgrade
   "B",  # flake8-bugbear
   "I",  # isort
-  "PLC0415",  # import-outside-top-level
-  "RUF100",  # unused noqa directive
   "UP", # pyupgrade
 ]
 lint.ignore = ["E501", "B008"]
-# PLC0415 (import-outside-top-level) is enforced in tests only. Library code
-# still has deferred imports that have not been reviewed, so it stays exempt
-# for now.
-lint.per-file-ignores = { "langgraph/**" = ["PLC0415"] }
 target-version = "py310"
 
 [tool.ty.rules]

libs/checkpoint/tests/test_conformance_delta.py

@@ -12,14 +12,10 @@ conformance = pytest.importorskip(
 
 @pytest.mark.asyncio
 async def test_delta_channel_conformance():
-    # Imported inside the test: the module-level importorskip above is what
-    # makes these safe, so they cannot move to the top of the file.
-    from langgraph.checkpoint.conformance import validate  # noqa: PLC0415
-    from langgraph.checkpoint.conformance.initializer import (  # noqa: PLC0415
-        checkpointer_test,
-    )
+    from langgraph.checkpoint.conformance import validate
+    from langgraph.checkpoint.conformance.initializer import checkpointer_test
 
-    from langgraph.checkpoint.memory import InMemorySaver  # noqa: PLC0415
+    from langgraph.checkpoint.memory import InMemorySaver
 
     @checkpointer_test(name="InMemorySaver")
     async def mem_saver():

libs/checkpoint/tests/test_encrypted.py

@@ -307,6 +307,8 @@ class TestWithMsgpackAllowlistEncrypted:
             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

libs/checkpoint/tests/test_jsonplus.py

@@ -1,12 +1,9 @@
 import dataclasses
 import json
 import logging
-import os
 import pathlib
-import pickle
 import re
 import sys
-import tempfile
 import uuid
 from collections import deque
 from datetime import date, datetime, time, timezone
@@ -21,7 +18,7 @@ import ormsgpack
 import pandas as pd
 import pytest
 from langchain_core.documents.base import Document
-from langchain_core.messages import AIMessage, HumanMessage
+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
@@ -344,6 +341,7 @@ def test_lc2_json_safe_type_revives_without_allowlist() -> None:
     constructor dicts. Resuming those threads must reconstruct proper BaseMessage objects
     rather than returning raw dicts that cause MESSAGE_COERCION_FAILURE in add_messages.
     """
+    from langchain_core.messages import AIMessage
 
     serde = JsonPlusSerializer()  # default: _allowed_json_modules=None
 
@@ -412,6 +410,7 @@ def test_lc2_json_method_field_is_ignored() -> None:
     to that method: the result is whatever ``AIMessage(*args, **kwargs)`` would
     produce, which proves the default constructor ran instead of ``parse_raw``.
     """
+    from langchain_core.messages import AIMessage
 
     serde = JsonPlusSerializer()
     load = {
@@ -437,6 +436,7 @@ def test_lc2_json_method_field_is_ignored_for_allowlisted_types() -> None:
     method dispatch as a side effect. Revival is restricted to the default
     constructor regardless of how the class reached the revival path.
     """
+    from langchain_core.messages import AIMessage
 
     serde = JsonPlusSerializer(
         allowed_json_modules=[("langchain_core.messages.ai", "AIMessage")]
@@ -455,6 +455,7 @@ def test_lc2_json_method_field_is_ignored_for_allowlisted_types() -> None:
 
 def test_lc2_json_safe_type_init_still_works() -> None:
     """SAFE-type lc=2 revival without a `method` field still constructs the class."""
+    from langchain_core.messages import AIMessage
 
     serde = JsonPlusSerializer()
     load = {
@@ -478,6 +479,7 @@ def test_lc2_json_legacy_pydantic_method_list_falls_back_to_default() -> None:
     this shape continue to revive correctly as long as the default constructor
     accepts the serialized kwargs.
     """
+    from langchain_core.messages import AIMessage
 
     serde = JsonPlusSerializer()
     load = {
@@ -549,6 +551,9 @@ def test_lc2_json_safe_type_pickle_payload_does_not_execute() -> None:
     With method dispatch removed from `_revive_lc2`, the gadget bytes are never
     passed to `parse_raw` and therefore never reach `pickle.loads`.
     """
+    import os
+    import pickle
+    import tempfile
 
     marker = tempfile.NamedTemporaryFile(
         prefix="lc2_block_proof_", suffix=".out", delete=False

libs/checkpoint/tests/test_memory.py

@@ -1,4 +1,3 @@
-import asyncio
 import logging
 from typing import Any
 
@@ -524,6 +523,7 @@ class TestBaseFallbackGetChannelWrites:
         `threading.local()` guard would let whichever task set it first
         short-circuit the other to `writes=[]`.
         """
+        import asyncio
 
         saver, thread_id, ns = self._build_saver_with_chain()
 

libs/checkpoint/uv.lock

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 [[package]]
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 [[package]]
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-version = "1.5.2"
+version = "1.4.0"
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 ]
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 [[package]]
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-version = "0.0.18"
+version = "0.0.15"
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 [[package]]
@@ -383,7 +383,7 @@ test = [
 
 [[package]]
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-version = "0.8.18"
+version = "0.8.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
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@@ -393,13 +393,12 @@ dependencies = [
     { name = "requests" },
     { name = "requests-toolbelt" },
     { name = "uuid-utils" },
-    { name = "websockets" },
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 version = "3.6.0"

libs/cli/README.md

@@ -1,47 +1,29 @@
 # LangGraph CLI
 
-[![PyPI - Version](https://img.shields.io/pypi/v/langgraph-cli?label=%20)](https://pypi.org/project/langgraph-cli/#history)
-[![PyPI - License](https://img.shields.io/pypi/l/langgraph-cli)](https://opensource.org/licenses/MIT)
-[![PyPI - Downloads](https://img.shields.io/pepy/dt/langgraph-cli)](https://pypistats.org/packages/langgraph-cli)
-[![Twitter](https://img.shields.io/twitter/url/https/twitter.com/langchain_oss.svg?style=social&label=Follow%20%40LangChain)](https://x.com/langchain_oss)
+The official command-line interface for LangGraph, providing tools to create, develop, and deploy LangGraph applications.
 
-To help you ship LangGraph apps to production faster, check out [LangSmith](https://www.langchain.com/langsmith).
-[LangSmith](https://www.langchain.com/langsmith) is a unified developer platform for building, testing, and monitoring LLM applications.
-
-## Quick Install
+## Installation
 
+Install via pip:
 ```bash
-uv add langgraph-cli
+pip install langgraph-cli
 ```
 
-## 🤔 What is this?
-
-The LangGraph CLI is the official command-line interface for LangGraph. It provides tools to create, develop, build, and run LangGraph applications locally or in Docker.
-
-## 📖 Documentation
-
-For full documentation, see the [LangGraph CLI reference](https://reference.langchain.com/python/langgraph-cli). For conceptual guides and tutorials, see the [LangGraph Docs](https://docs.langchain.com/oss/python/langgraph/overview).
-
 For development mode with hot reloading:
-
 ```bash
-uv add "langgraph-cli[inmem]"
+pip install "langgraph-cli[inmem]"
 ```
 
 ## Commands
 
 ### `langgraph new` 🌱
-
-Create a new LangGraph project from a template.
-
+Create a new LangGraph project from a template
 ```bash
 langgraph new [PATH] --template TEMPLATE_NAME
 ```
 
 ### `langgraph dev` 🏃‍♀️
-
-Run LangGraph API server in development mode with hot reloading.
-
+Run LangGraph API server in development mode with hot reloading
 ```bash
 langgraph dev [OPTIONS]
   --host TEXT                 Host to bind to (default: 127.0.0.1)
@@ -53,9 +35,7 @@ langgraph dev [OPTIONS]
 ```
 
 ### `langgraph up` 🚀
-
-Launch LangGraph API server in Docker.
-
+Launch LangGraph API server in Docker
 ```bash
 langgraph up [OPTIONS]
   -p, --port INTEGER        Port to expose (default: 8123)
@@ -67,9 +47,7 @@ langgraph up [OPTIONS]
 ```
 
 ### `langgraph build`
-
-Build a Docker image for your LangGraph application.
-
+Build a Docker image for your LangGraph application
 ```bash
 langgraph build -t IMAGE_TAG [OPTIONS]
   --platform TEXT          Target platforms (e.g., linux/amd64,linux/arm64)
@@ -78,9 +56,7 @@ langgraph build -t IMAGE_TAG [OPTIONS]
 ```
 
 ### `langgraph dockerfile`
-
-Generate a Dockerfile for custom deployments.
-
+Generate a Dockerfile for custom deployments
 ```bash
 langgraph dockerfile SAVE_PATH [OPTIONS]
   -c, --config FILE       Config file path
@@ -92,18 +68,18 @@ The CLI uses a `langgraph.json` configuration file with these key settings:
 
 ```json
 {
-  "dependencies": ["langchain_openai", "./your_package"],
+  "dependencies": ["langchain_openai", "./your_package"],  // Required: Package dependencies
   "graphs": {
-    "my_graph": "./your_package/file.py:graph"
+    "my_graph": "./your_package/file.py:graph"            // Required: Graph definitions
   },
-  "env": "./.env",
-  "python_version": "3.11",
-  "pip_config_file": "./pip.conf",
-  "dockerfile_lines": []
+  "env": "./.env",                                        // Optional: Environment variables
+  "python_version": "3.11",                               // Optional: Python version (3.11/3.12)
+  "pip_config_file": "./pip.conf",                        // Optional: pip configuration
+  "dockerfile_lines": []                                  // Optional: Additional Dockerfile commands
 }
 ```
 
-See the [full documentation](https://reference.langchain.com/python/langgraph-cli) for detailed configuration options.
+See the [full documentation](https://langchain-ai.github.io/langgraph/cloud/reference/cli/) for detailed configuration options.
 
 ## Development
 
@@ -111,26 +87,19 @@ To develop the CLI itself:
 
 1. Clone the repository
 2. Navigate to the CLI directory: `cd libs/cli`
-3. Install development dependencies: `uv sync`
+3. Install development dependencies: `uv pip install`
 4. Make your changes to the CLI code
 5. Test your changes:
+   ```bash
+   # Run CLI commands directly
+   uv run langgraph --help
+   
+   # Or use the examples
+   cd examples
+   uv pip install
+   uv run langgraph dev  # or other commands
+   ```
 
-```bash
-# Run CLI commands directly
-uv run langgraph --help
+## License
 
-# Or use the examples
-cd examples
-uv sync
-uv run langgraph dev  # or other commands
-```
-
-## 📕 Releases & Versioning
-
-See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning](https://docs.langchain.com/oss/python/versioning) policies.
-
-## 💁 Contributing
-
-As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
-
-For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview).
+This project is licensed under the terms specified in the repository's LICENSE file.

libs/cli/examples/graph_prerelease_reqs/pyproject.toml

@@ -6,7 +6,7 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
   "langchain-openai==1.1.14",
-  "langchain-anthropic==1.4.6",
+  "langchain-anthropic==1.0.0a5",
   "langgraph==1.1.5"
 ]
 

libs/cli/examples/graphs/storm.py

@@ -236,7 +236,7 @@ def swap_roles(state: InterviewState, name: str):
     converted = []
     for message in state["messages"]:
         if isinstance(message, AIMessage) and message.name != name:
-            message = HumanMessage(**message.model_dump(exclude={"type"}))
+            message = HumanMessage(**message.dict(exclude={"type"}))
         converted.append(message)
     return {"messages": converted}
 

libs/cli/js-examples/README.md

@@ -10,7 +10,7 @@ This template demonstrates a simple chatbot implemented using [LangGraph.js](htt
 
 The core logic, defined in `src/agent/graph.ts`, showcases a straightforward chatbot that responds to user queries while maintaining context from previous messages.
 
-## 🤔 What is this?
+## What it does
 
 The simple chatbot:
 
@@ -20,10 +20,6 @@ The simple chatbot:
 
 This template provides a foundation that can be easily customized and extended to create more complex conversational agents.
 
-## 📖 Documentation
-
-For JavaScript and TypeScript documentation, see the [LangGraph.js docs](https://docs.langchain.com/oss/javascript/langgraph/overview). LangGraph Studio also integrates with [LangSmith](https://smith.langchain.com/) for tracing and collaboration with teammates.
-
 ## Getting Started
 
 Assuming you have already [installed LangGraph Studio](https://github.com/langchain-ai/langgraph-studio?tab=readme-ov-file#download), to set up:

libs/cli/js-examples/package.json

@@ -21,28 +21,25 @@
     "test:all": "yarn test && yarn test:int && yarn lint:langgraph"
   },
   "dependencies": {
-    "@langchain/core": "^1.2.4",
-    "@langchain/langgraph": "^1.4.8"
-  },
-  "resolutions": {
-    "@langchain/langgraph-checkpoint": "1.0.4"
+    "@langchain/core": "^1.1.48",
+    "@langchain/langgraph": "^1.3.3"
   },
   "devDependencies": {
-    "@eslint/eslintrc": "^3.3.6",
+    "@eslint/eslintrc": "^3.3.5",
     "@eslint/js": "^10.0.1",
     "@tsconfig/recommended": "^1.0.13",
     "@types/jest": "^30.0.0",
-    "@typescript-eslint/eslint-plugin": "^8.65.0",
-    "@typescript-eslint/parser": "^8.65.0",
+    "@typescript-eslint/eslint-plugin": "^8.60.1",
+    "@typescript-eslint/parser": "^8.60.1",
     "dotenv": "^17.4.2",
-    "eslint": "^10.8.0",
+    "eslint": "^10.4.1",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.32.0",
     "eslint-plugin-no-instanceof": "^1.0.1",
     "eslint-plugin-prettier": "^5.5.6",
     "jest": "^30.4.2",
-    "prettier": "^3.9.6",
-    "ts-jest": "^29.4.12",
-    "typescript": "^7.0.2"
+    "prettier": "^3.8.3",
+    "ts-jest": "^29.4.11",
+    "typescript": "^6.0.3"
   }
 }

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

@@ -9,10 +9,10 @@
   },
   "dependencies": {
     "@js-monorepo-example/shared": "*",
-    "@langchain/core": "^1.2.4",
-    "@langchain/langgraph": "^1.4.8"
+    "@langchain/core": "^1.1.48",
+    "@langchain/langgraph": "^1.3.3"
   },
   "devDependencies": {
-    "typescript": "^7.0.2"
+    "typescript": "^6.0.3"
   }
 }

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

@@ -9,6 +9,6 @@
     "clean": "rm -rf dist"
   },
   "devDependencies": {
-    "typescript": "^7.0.2"
+    "typescript": "^6.0.3"
   }
 }

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

@@ -17,18 +17,18 @@
     "lint": "eslint 'apps/**/*.ts' 'libs/**/*.ts'"
   },
   "devDependencies": {
-    "turbo": "^2.10.8",
-    "typescript": "^7.0.2",
+    "turbo": "^2.9.16",
+    "typescript": "^6.0.3",
     "@tsconfig/recommended": "^1.0.13",
-    "@eslint/eslintrc": "^3.3.6",
+    "@eslint/eslintrc": "^3.3.5",
     "@eslint/js": "^10.0.1",
-    "eslint": "^10.8.0",
+    "eslint": "^10.4.1",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import": "^2.27.5",
     "eslint-plugin-no-instanceof": "^1.0.1",
     "eslint-plugin-prettier": "^5.5.6",
-    "@typescript-eslint/eslint-plugin": "^8.65.0",
-    "@typescript-eslint/parser": "^8.65.0",
-    "prettier": "^3.9.6"
+    "@typescript-eslint/eslint-plugin": "^8.60.1",
+    "@typescript-eslint/parser": "^8.60.1",
+    "prettier": "^3.8.3"
   }
 }

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

@@ -28,10 +28,10 @@
     debug "^4.3.1"
     minimatch "^10.2.4"
 
-"@eslint/config-helpers@^0.7.0":
-  version "0.7.0"
-  resolved "https://registry.yarnpkg.com/@eslint/config-helpers/-/config-helpers-0.7.0.tgz#09ee4aa07b73f059ec2d4c74bf4b2ff02b322377"
-  integrity sha512-DObd/KKUsU+FaFv4PLxSRenpXfQWmPXXP3pPZ6/K1PCrMu2vQpMDMuQe/BqYeoLcz8ro0bVDF1RxOJgfVEdhUw==
+"@eslint/config-helpers@^0.6.0":
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/@eslint/config-helpers/-/config-helpers-0.6.0.tgz#ef9a36881d39dfd5dbeac22b0da997fabfb08b03"
+  integrity sha512-ii6Bw9jJ2zi2cWA2Z+9/QZ/+3DX6kwaV5Q986D/CdP3Lap3w/pgQZ373FV7byY/i7L4IRH/G43I5dz1ClsCbpA==
   dependencies:
     "@eslint/core" "^1.2.1"
 
@@ -42,10 +42,10 @@
   dependencies:
     "@types/json-schema" "^7.0.15"
 
-"@eslint/eslintrc@^3.3.6":
-  version "3.3.6"
-  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-3.3.6.tgz#d22bfd6b3a7d8e1f2c0b2f2e6de111b53ec6e13e"
-  integrity sha512-l2Ul9PrHsPCKcEY/ac7VgFj9D80C7S68sOKc618SyHDPK36s1XcFebXY0iTzUVn4Yq+YbwvSnDmCz9yxjX+QrA==
+"@eslint/eslintrc@^3.3.5":
+  version "3.3.5"
+  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-3.3.5.tgz#c131793cfc1a7b96f24a83e0a8bbd4b881558c60"
+  integrity sha512-4IlJx0X0qftVsN5E+/vGujTRIFtwuLbNsVUe7TO6zYPDR1O6nFwvwhIKEKSrl6dZchmYBITazxKoUYOjdtjlRg==
   dependencies:
     ajv "^6.14.0"
     debug "^4.3.2"
@@ -53,7 +53,7 @@
     globals "^14.0.0"
     ignore "^5.2.0"
     import-fresh "^3.2.1"
-    js-yaml "^4.3.0"
+    js-yaml "^4.1.1"
     minimatch "^3.1.5"
     strip-json-comments "^3.1.1"
 
@@ -103,10 +103,10 @@
   resolved "https://registry.yarnpkg.com/@isaacs/cliui/-/cliui-9.0.0.tgz#4d0a3f127058043bf2e7ee169eaf30ed901302f3"
   integrity sha512-AokJm4tuBHillT+FpMtxQ60n8ObyXBatq7jD2/JA9dxbDDokKQm8KMht5ibGzLVU9IJDIKK4TPKgMHEYMn3lMg==
 
-"@langchain/core@^1.2.4":
-  version "1.2.4"
-  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.2.4.tgz#3916181e00f93b2e3b5801ab8273c07d144d75ce"
-  integrity sha512-GIrJktdsFPx8gM0C3VyikkeYGZAV7iRIzUJuS5tFatiKLExybou0LI0MuxH9kksN38quyfWdQDl20lIEAEVkVA==
+"@langchain/core@^1.1.48":
+  version "1.1.48"
+  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.48.tgz#dfe7f6a64b0e3e79e5357ed4b402c021ee315a7f"
+  integrity sha512-fQU6Guyb1pwc2fEplmA8FPbKfOMAofjnyJzExevro0FxEiuGHE18Ov/ZHmT9trWCDTZRI9eW1VIc6aChxV8pAQ==
   dependencies:
     "@cfworker/json-schema" "^4.0.2"
     "@standard-schema/spec" "^1.1.0"
@@ -116,35 +116,39 @@
     p-queue "^6.6.2"
     zod "^3.25.76 || ^4"
 
-"@langchain/langgraph-checkpoint@^1.1.3":
-  version "1.1.3"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-checkpoint/-/langgraph-checkpoint-1.1.3.tgz#891f2f9a2e96cf2ab0920f9240f9ad1e0a86a4ab"
-  integrity sha512-wgzdQNeEsdw1e+4lvlj0tdq/RYR/k1vPin10g0ymGoehZDDgd9nvIllGXSXN4TFgF9sf5qQP/KTkOcLfeseIhA==
-
-"@langchain/langgraph-sdk@~1.9.26":
-  version "1.9.28"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.9.28.tgz#1664cc7b6f2c1509ddffecf17d805a26e70a7e1a"
-  integrity sha512-4j3XuM0PvtmAbL8mPfBS99ez3+ytRfgbOpAR/nOeaejTRF3Q9dNw2QnaGLGng8wLPtGLoSj+SYgUOVxy9Bv9vg==
+"@langchain/langgraph-checkpoint@^1.0.4":
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-checkpoint/-/langgraph-checkpoint-1.0.4.tgz#893aa7255b2fe810fdeb50281f6750a3b0a6fef7"
+  integrity sha512-1y5MgZ0gXXrtmoy56e3kaBChI3GwFPIKl27xkrHwN+VE/3iUsyr9gO3Jtp7kdKAe6diZGbcas5bdC/r0yUwTZA==
   dependencies:
-    "@langchain/protocol" "^0.0.18"
+    uuid "^14.0.0"
+
+"@langchain/langgraph-sdk@~1.9.11":
+  version "1.9.11"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.9.11.tgz#d16f18b2c48e544436489172d86b3c78524eb679"
+  integrity sha512-mhadkZy4LQ97NJwvATiVIkSxVfOnauXNhrVHFgGnzyqr5zzPLS0VIKJW9xKT+pM8yLqW8Qj6+nPPNhwGUaxoRw==
+  dependencies:
+    "@langchain/protocol" "^0.0.16"
     "@types/json-schema" "^7.0.15"
     p-queue "^9.0.1"
     p-retry "^7.1.1"
+    uuid "^14.0.0"
 
-"@langchain/langgraph@^1.4.8":
-  version "1.4.8"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.4.8.tgz#65ef5635b5554cd32f502a3808b92d8371998a99"
-  integrity sha512-DN1Np1XefdBEbp1qBKlt39cwoL743AAGpR5Ipja0gY2YbWvsoQnOTIrjnj/orSAhaUYsdTKS8VSWdFzsHZo6Ig==
+"@langchain/langgraph@^1.3.3":
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.3.3.tgz#c7bb19029e37971116e07101be3d8fd4b6483d50"
+  integrity sha512-8xbpGUQNBcWua7ivT5vUvDnQ+6Qbt0JO8RisgXZ8guPXNqh8plGVvrODW68S4AlJbOYY2yi0ROKtrL/1yN3MBQ==
   dependencies:
-    "@langchain/langgraph-checkpoint" "^1.1.3"
-    "@langchain/langgraph-sdk" "~1.9.26"
-    "@langchain/protocol" "^0.0.18"
+    "@langchain/langgraph-checkpoint" "^1.0.4"
+    "@langchain/langgraph-sdk" "~1.9.11"
+    "@langchain/protocol" "^0.0.16"
     "@standard-schema/spec" "1.1.0"
+    uuid "^14.0.0"
 
-"@langchain/protocol@^0.0.18":
-  version "0.0.18"
-  resolved "https://registry.yarnpkg.com/@langchain/protocol/-/protocol-0.0.18.tgz#6d96155e7263c958fbce6d4b7241b4725b72fbad"
-  integrity sha512-XW1egQtPfsGI41w2AMZNFZrUIwFSQHTjVMZs0OaTpCAvht/QLoaPN8FQcsysMVypOhupG28J29yOorrc70otBQ==
+"@langchain/protocol@^0.0.16":
+  version "0.0.16"
+  resolved "https://registry.yarnpkg.com/@langchain/protocol/-/protocol-0.0.16.tgz#68b63d58feaf4f0acf77405cb8fb16f9c3f09b60"
+  integrity sha512-ws+J7MaHyhO5dG7f0vdyHQiUn9hoCnki0f3crJPa4MCTGzcRC39jYSCghyrGtBPYQnZbUQiGyRVpW3z3M8IpJg==
 
 "@pkgr/core@^0.3.6":
   version "0.3.6"
@@ -166,35 +170,35 @@
   resolved "https://registry.yarnpkg.com/@tsconfig/recommended/-/recommended-1.0.13.tgz#269fce3ad04ca70b93269ff44cca81b950f542da"
   integrity sha512-sySRuBfMKyKO/j2ZAhR8kSembhjuPEV4Ra3AHtmWLq51+iGaudr45crPSzNC5b7/Ctrh9dfUpBuTlYrH6rM58Q==
 
-"@turbo/darwin-64@2.10.8":
-  version "2.10.8"
-  resolved "https://registry.yarnpkg.com/@turbo/darwin-64/-/darwin-64-2.10.8.tgz#0ae7cde6b95b82b0a4fe406ffea64bdfcf68a0ee"
-  integrity sha512-po+7rfJfUnFXjWlcoN2RwhErgzCdRtBc1T26vYPcywHlggmCQiQe1uWaE4j+BibI2uY9/2pDoFzMN0rmSaPFOw==
+"@turbo/darwin-64@2.9.16":
+  version "2.9.16"
+  resolved "https://registry.yarnpkg.com/@turbo/darwin-64/-/darwin-64-2.9.16.tgz#f4146eab98e020d658a9a5d7feb846acba653546"
+  integrity sha512-jLjApWTSNd7JZ5JaLYfelW1ytnGQOvB7ivl+2RD1xQvJTbi8I9gBjzcga7tDZVPyaxpl10YTfJt3BrYXR18KDw==
 
-"@turbo/darwin-arm64@2.10.8":
-  version "2.10.8"
-  resolved "https://registry.yarnpkg.com/@turbo/darwin-arm64/-/darwin-arm64-2.10.8.tgz#18a9127c0a0d9c5ad7de49bdb27e7032f8946334"
-  integrity sha512-+zB2btDJ00lnPRuqOvpVvgl4x34k/djZQGZTTCfjn7JgNCl8QFY5Njo5+dqkY1g/+9gbbsnAvWm9CmJg9ebcXA==
+"@turbo/darwin-arm64@2.9.16":
+  version "2.9.16"
+  resolved "https://registry.yarnpkg.com/@turbo/darwin-arm64/-/darwin-arm64-2.9.16.tgz#1d01ca232fc189045d6a4dba4741f462e0343b8c"
+  integrity sha512-YPgrn+5HIGzrx0O2a631SV4MBQUe4W/DafMFUuBVgaU32PW9/OTT0ehviF0QSxTXuRJlHvW2eUTemddF5/spmw==
 
-"@turbo/linux-64@2.10.8":
-  version "2.10.8"
-  resolved "https://registry.yarnpkg.com/@turbo/linux-64/-/linux-64-2.10.8.tgz#1677672f5760d272c0a0608686fe8b8b29491fdb"
-  integrity sha512-K1dxqiVisyN7cViVsfQLs6xscQbYuI8aO2nbUhFURDACgEDfZRdP/b4CCxeosBJpcMfhYyiibWqJorCnvz9kKg==
+"@turbo/linux-64@2.9.16":
+  version "2.9.16"
+  resolved "https://registry.yarnpkg.com/@turbo/linux-64/-/linux-64-2.9.16.tgz#8db630e6e5681a2ea48f7df1bca57bbd9bdf3e25"
+  integrity sha512-vAEf1H6l26lTpl9FJ/peQo1NUB8RC0sbEJJz5mPcUhHA2bPDup2x3CZPgo/bH8S4cUcBLm4FN3UHd5iUO2RAew==
 
-"@turbo/linux-arm64@2.10.8":
-  version "2.10.8"
-  resolved "https://registry.yarnpkg.com/@turbo/linux-arm64/-/linux-arm64-2.10.8.tgz#dbdb5aef9e53bb4c88357dafc19f79138ec29253"
-  integrity sha512-Gi77ibVnrE1fEmvr+/wBD/yvRqhwp/RQuCp2+//lv1U1wNFFyVg0V7Wj8FG9FXPFAw5QHReo8rxc9+wBSDZjzA==
+"@turbo/linux-arm64@2.9.16":
+  version "2.9.16"
+  resolved "https://registry.yarnpkg.com/@turbo/linux-arm64/-/linux-arm64-2.9.16.tgz#d1de82fc8075c4774b214dd2f5e8e2570bb03643"
+  integrity sha512-xDBLR2PZg4BrQOchfG6svgpv5FCNJ2TOtT2psLdEJcdKo1BH+pnPs9Xj6pvUjgfkHbuvBOfeE4R6tvxMoQKDHQ==
 
-"@turbo/windows-64@2.10.8":
-  version "2.10.8"
-  resolved "https://registry.yarnpkg.com/@turbo/windows-64/-/windows-64-2.10.8.tgz#451c3b5421c9ce573c764b1efacae5ad4d1312ee"
-  integrity sha512-znnLO1haJPYTHoKMKwlAvlkjRiYbbhBzME6wIGaMd+fwir23U6jVd1ecaTWWi1fbnRVqxMfgDBKseQ/hLKb83g==
+"@turbo/windows-64@2.9.16":
+  version "2.9.16"
+  resolved "https://registry.yarnpkg.com/@turbo/windows-64/-/windows-64-2.9.16.tgz#e369c51edd737978651c2f6b4ce49b582976d66f"
+  integrity sha512-NBAJnaUiGdgkSzQwUIdOvkCkcpTSu58G/sBGa0mvBtzfvFOOgrQwepKOOQ8cp6sWM6OcKDNFj2p1dsZA1OWjPg==
 
-"@turbo/windows-arm64@2.10.8":
-  version "2.10.8"
-  resolved "https://registry.yarnpkg.com/@turbo/windows-arm64/-/windows-arm64-2.10.8.tgz#5661ca9b75713aece06d319493e48a366a4cd05c"
-  integrity sha512-VN30vh3b3Czh2WzYHNTfF1FE0YMZ5aHsLO8dBMGHJewA6792wX6iJR8ZxlzFW6WdOu0gEAKIvlYhfyT81Wkm4Q==
+"@turbo/windows-arm64@2.9.16":
+  version "2.9.16"
+  resolved "https://registry.yarnpkg.com/@turbo/windows-arm64/-/windows-arm64-2.9.16.tgz#dbb2b2863e80eb9ca8da8bd8da63e2cc457e470c"
+  integrity sha512-Y7SJppD0Z8wjO3Ec0ZGd9KQ4Yv0BMnA8CIowj5Vp+OEVsosXDG2weK6/t1RRLfJmc2Ozrnd6y4DOgQys+mn3WQ==
 
 "@types/esrecurse@^4.3.1":
   version "4.3.1"
@@ -216,212 +220,102 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==
 
-"@typescript-eslint/eslint-plugin@^8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.65.0.tgz#0a58df6fea8c0bf6b396f518077099bc8b762bb5"
-  integrity sha512-IEgob78X12rHpUmtcwFsXhZdVGJtwTVP8FiCLZkR6GlYVrl2PcuB+KhCE5BlVC/eQpQnu8WXRtkHZuPar+gCRA==
+"@typescript-eslint/eslint-plugin@^8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.60.1.tgz#c1060bb8fa4be80624d3f3dec8dd9caca373af76"
+  integrity sha512-JQ4S5GB0tfjO8BuJ4fcX+HodkzJjYBV+7OJ+wLygaX7OGQ7FudyHL4NSCA6ob+w3Yn+5MkKIozOwQhXeM7opVg==
   dependencies:
     "@eslint-community/regexpp" "^4.12.2"
-    "@typescript-eslint/scope-manager" "8.65.0"
-    "@typescript-eslint/type-utils" "8.65.0"
-    "@typescript-eslint/utils" "8.65.0"
-    "@typescript-eslint/visitor-keys" "8.65.0"
+    "@typescript-eslint/scope-manager" "8.60.1"
+    "@typescript-eslint/type-utils" "8.60.1"
+    "@typescript-eslint/utils" "8.60.1"
+    "@typescript-eslint/visitor-keys" "8.60.1"
     ignore "^7.0.5"
     natural-compare "^1.4.0"
     ts-api-utils "^2.5.0"
 
-"@typescript-eslint/parser@^8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.65.0.tgz#5295c1058c0a1dd746ef28baaf9c0341dbdf03dc"
-  integrity sha512-CZ4nMxWwgu1HEEFNkeaCptra9QCtkmKdgf3sWh1rl1trIhmxLilgTV4cwcbQ4wemnT4sWQN8CaKOmdYx+g2gMA==
+"@typescript-eslint/parser@^8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.60.1.tgz#a9d7f30850384d34b41f4687dd8944823c09e289"
+  integrity sha512-A0M6ua6H252bVjPvvtSgl2QA4+ET9S5Mtkb2GDyTxIhH/C4qDItT7RQNO5PhMC6NXGYXOR9dIalcDDgBKT7oFA==
   dependencies:
-    "@typescript-eslint/scope-manager" "8.65.0"
-    "@typescript-eslint/types" "8.65.0"
-    "@typescript-eslint/typescript-estree" "8.65.0"
-    "@typescript-eslint/visitor-keys" "8.65.0"
+    "@typescript-eslint/scope-manager" "8.60.1"
+    "@typescript-eslint/types" "8.60.1"
+    "@typescript-eslint/typescript-estree" "8.60.1"
+    "@typescript-eslint/visitor-keys" "8.60.1"
     debug "^4.4.3"
 
-"@typescript-eslint/project-service@8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.65.0.tgz#65fbbc9a1591abffaeab5513200f848271cb0aa5"
-  integrity sha512-SxnPhbTsGahizDgbu7oqFH/xVtzIqMd/s+WtnSxNxJZJpLbdT5IPdzg8EZxO3+PoKahXmwJLeNQOpKJb3/bi7Q==
+"@typescript-eslint/project-service@8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.60.1.tgz#eb29712f58d72c222fc727162e92f2ab4670971b"
+  integrity sha512-eXkTH2bxmXlqD1RnOPmLZ9ZM9D3VwSx04JOwBnP9RQ+yUA5a2Mu7SfW8uaV2Aon53NJzZlZYuX7tn91Izf+xaw==
   dependencies:
-    "@typescript-eslint/tsconfig-utils" "^8.65.0"
-    "@typescript-eslint/types" "^8.65.0"
+    "@typescript-eslint/tsconfig-utils" "^8.60.1"
+    "@typescript-eslint/types" "^8.60.1"
     debug "^4.4.3"
 
-"@typescript-eslint/scope-manager@8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.65.0.tgz#9547202ce7e608e7b6283df585703b980a0ea70d"
-  integrity sha512-Esbl8OSYiVxBokYgWPf7VVWg/BE798wXhimnn9ML9Pt5qoDf8bfQlgjlKXR/k98+AcNzlLKYrpCcrcuZ9DZLgg==
+"@typescript-eslint/scope-manager@8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.60.1.tgz#2f875962eaad0a0789cc3c36aea9b4ddeb2dd9c8"
+  integrity sha512-gvI5OQoptnxQnchOirukCuQ55svJSTuD/4k5+pC267xyBtYry748R9/c3tYUzb/iE6RZfllRz2lVulLCHkTm4w==
   dependencies:
-    "@typescript-eslint/types" "8.65.0"
-    "@typescript-eslint/visitor-keys" "8.65.0"
+    "@typescript-eslint/types" "8.60.1"
+    "@typescript-eslint/visitor-keys" "8.60.1"
 
-"@typescript-eslint/tsconfig-utils@8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.65.0.tgz#36f168fcdbb1295f7446ff0379667f98c3cf1bf3"
-  integrity sha512-j6GzGqCiRdA7Qhur2VVmKZAkBLfnHFQfx4TaJGL9RMveZqCo48jSHHO0DTgizEnGhtWnqmbtCUSrqSkdiY/0Hg==
+"@typescript-eslint/tsconfig-utils@8.60.1", "@typescript-eslint/tsconfig-utils@^8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.60.1.tgz#bee8b942a13679a878101c9c74577d732062ed93"
+  integrity sha512-nh8w4qAteiKuZu3pSSzG/yGKpw0OlkrKnzFmbVRenKaD4qc+7i1GrmZaLVkr8rk4uipiPGMOW4YsM6WmKZ5CvA==
 
-"@typescript-eslint/tsconfig-utils@^8.65.0":
-  version "8.66.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.66.0.tgz#3a89066c507aa30541dc176804685b4b444e1e52"
-  integrity sha512-9D5gLYZG4rOjcoag8MQ/fWI8WqA9wcPDyOGyWtWFhvM1lHRbliqUSPIY5J3zqCU1tvSwzXxnnjhQhz5Ne7mJ4g==
-
-"@typescript-eslint/type-utils@8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.65.0.tgz#d316d7522d93cff4cd14f305e02f3df2d804f9c1"
-  integrity sha512-YjaZ7PRI5qY7ax2L3PbvX0rRyGtipAReCWs0mhhDBHjH/vl0g0BonaGXrKdKpMbIIsMIwDgbk/xzkBTyAltS5g==
+"@typescript-eslint/type-utils@8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.60.1.tgz#1ae45f0f2a701354beea4a58c2161e40a5e3c379"
+  integrity sha512-sdwTrpjosW7ANQYJ39ZBF1ZyEMEGVB2UsikrserVM/30a/F1dTLnu9bGxEdosugyu5caigjLrR2qiD11asjI1A==
   dependencies:
-    "@typescript-eslint/types" "8.65.0"
-    "@typescript-eslint/typescript-estree" "8.65.0"
-    "@typescript-eslint/utils" "8.65.0"
+    "@typescript-eslint/types" "8.60.1"
+    "@typescript-eslint/typescript-estree" "8.60.1"
+    "@typescript-eslint/utils" "8.60.1"
     debug "^4.4.3"
     ts-api-utils "^2.5.0"
 
-"@typescript-eslint/types@8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.65.0.tgz#3e86738416a777c8b8925ab46745f48ecf904c9f"
-  integrity sha512-JSSwWNy+H0E/01jJEM+hrX6N0OFDzFzeIhHFSAS01tlVaevpG8cFyYRPhS5yjGOvBUx3sqQHVMjCL1CAZZMxBg==
+"@typescript-eslint/types@8.60.1", "@typescript-eslint/types@^8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.60.1.tgz#ccdc482ba9e17f9723a10ce240b5e67dad3046c4"
+  integrity sha512-4h0tY8ppCkdCzcrl2YM5M3my0xsE1Tf8om3owEu5oPWmXwkKRmk0j0LGDzYBGUcAlesEbxBhazqu/K4cu3Ug7w==
 
-"@typescript-eslint/types@^8.65.0":
-  version "8.66.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.66.0.tgz#3cacab94d3b564c1d48c56eb37b89f89a6d48479"
-  integrity sha512-H6gcYaSDOyvL3AD/jHUtUFo2jqGgn/F6nuyuZSu0QTesxL+cP4dQoIMrODRofuJC09g64+WgZ6tE19Y1N2YIFQ==
-
-"@typescript-eslint/typescript-estree@8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.65.0.tgz#f1f514808f6aa713e2d678ae8ff592a65e1632af"
-  integrity sha512-JboAE2swaYt4tb1fHhHTABE2K+OLy09XfcTbhnk4Pw96f9dd2e9iYsJ28gBggHlo5z5x1rkyWvcPoTuNTd4oGg==
+"@typescript-eslint/typescript-estree@8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.60.1.tgz#016630b119228bf483ddc652703a6a038f3fdd74"
+  integrity sha512-alpRkfG8hlVE5kdJW2GkfgDgXxold3e8e4l6EnmhRmRLbekgAPCCGDVD++sABy9FcgPFroq+uFcCSM1vR57Cew==
   dependencies:
-    "@typescript-eslint/project-service" "8.65.0"
-    "@typescript-eslint/tsconfig-utils" "8.65.0"
-    "@typescript-eslint/types" "8.65.0"
-    "@typescript-eslint/visitor-keys" "8.65.0"
+    "@typescript-eslint/project-service" "8.60.1"
+    "@typescript-eslint/tsconfig-utils" "8.60.1"
+    "@typescript-eslint/types" "8.60.1"
+    "@typescript-eslint/visitor-keys" "8.60.1"
     debug "^4.4.3"
     minimatch "^10.2.2"
     semver "^7.7.3"
     tinyglobby "^0.2.15"
     ts-api-utils "^2.5.0"
 
-"@typescript-eslint/utils@8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.65.0.tgz#afedd974a0c8deeef553b509df5800bafd615a72"
-  integrity sha512-gXiwIHsYreboxeJucHKPvgwl7dXt50mF8s1/c00cP/WoVTyWKFdtfhRWwZiXYFU5H2O8vVoSLNrexFZjYS/SGA==
+"@typescript-eslint/utils@8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.60.1.tgz#31cf566095602d9fe8ad91837d2eb520b8de762b"
+  integrity sha512-h2MPBLoNtjc3qZWfY3Tl51yPorQ2McHn8pJfcMNTcIvrrZrr90Ykffit0yjrPFWQcRcUxzH20+6OcVdW4yHtUg==
   dependencies:
     "@eslint-community/eslint-utils" "^4.9.1"
-    "@typescript-eslint/scope-manager" "8.65.0"
-    "@typescript-eslint/types" "8.65.0"
-    "@typescript-eslint/typescript-estree" "8.65.0"
+    "@typescript-eslint/scope-manager" "8.60.1"
+    "@typescript-eslint/types" "8.60.1"
+    "@typescript-eslint/typescript-estree" "8.60.1"
 
-"@typescript-eslint/visitor-keys@8.65.0":
-  version "8.65.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.65.0.tgz#e3704c13cb4a1c22454c1abf28ff4737e15018c6"
-  integrity sha512-8C71BQkGjiMmXtop7pHVJu1l2NNShFdkCyD6a2ezzs5vU/L3LRtb69EtcteFwz0mYMPzIgOw0n6OV4VBUWZd7A==
+"@typescript-eslint/visitor-keys@8.60.1":
+  version "8.60.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.60.1.tgz#165d1d8901137b944efaf18f00ab5ecb57f06995"
+  integrity sha512-EbGRQg4FhrmwLodl+t3JNAnXHWVr9Vp+Zl1QBZVPY4ByfkzIT8cX3K6QWODHtkIZqqJVEWvhHSx3v5PDHsaQag==
   dependencies:
-    "@typescript-eslint/types" "8.65.0"
+    "@typescript-eslint/types" "8.60.1"
     eslint-visitor-keys "^5.0.0"
 
-"@typescript/typescript-aix-ppc64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-aix-ppc64/-/typescript-aix-ppc64-7.0.2.tgz#cdc7ce81d60f1e09034960ddfb1fb880d7a776b6"
-  integrity sha512-MTKKkWB7p/0E9xi1d1tHtZ5PiLkGEMIq88pK2CubZjOsLtYTLqhgIgi6zepFa+9GHZ6h05NMCkQxGKiPXMxXtQ==
-
-"@typescript/typescript-darwin-arm64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-darwin-arm64/-/typescript-darwin-arm64-7.0.2.tgz#a55fdfcfa58df58d27db2237cde6a5c1e35a7235"
-  integrity sha512-gowzar9MwS/aRWp6f3a4KUqzRjAZjOsmGNCM6LcTgXum+dBfgsBVMN+AgvOCCbguXyick6LJhpBszxMebJ8syA==
-
-"@typescript/typescript-darwin-x64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-darwin-x64/-/typescript-darwin-x64-7.0.2.tgz#38d1c9172800a91d707bec64d2a370a016634db4"
-  integrity sha512-SZ9xZInqApNlNGc9s0W1VSsktYSOe9cFqNOIqmN1Gs8SmkjKZYFt017G4VwPxASInODuAdbTW7sXiFUf893RgA==
-
-"@typescript/typescript-freebsd-arm64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-freebsd-arm64/-/typescript-freebsd-arm64-7.0.2.tgz#f1ff8810030b35d2b5be0db6a2dc650460ea94fa"
-  integrity sha512-W5NH4y/J0plIIS5b2xvTEkU7JFxyqdMAOgf+Ilhl0vHQXKO5dZoxd+C/jEtq56c4F3wk71RB4BMRQ2XdI+bwYQ==
-
-"@typescript/typescript-freebsd-x64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-freebsd-x64/-/typescript-freebsd-x64-7.0.2.tgz#3d86b03f353c5b1ba95162eb6ce35533bfc294bd"
-  integrity sha512-UMGDx5sTpzNw3WiPebH7l90IWfJggEd+egHt/q6p7/Cm3zqoV7VxkGXt+3DxPIw8CcmvAB0j3sVVfbhX+M4Tpw==
-
-"@typescript/typescript-linux-arm64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-linux-arm64/-/typescript-linux-arm64-7.0.2.tgz#d9334d96d6dac6ff85da9c865588948de939e91f"
-  integrity sha512-Qh4eU4/y3yDjnfjjyPYihMj5/ODIlmt+Bzu17OI+fiSRDW57QmU5SiN63exPRNJPKUzcc1INa1NXdrJ+MqHjUQ==
-
-"@typescript/typescript-linux-arm@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-linux-arm/-/typescript-linux-arm-7.0.2.tgz#ad94b41e1aee2a4dcc6a298c7b67c43345fde32e"
-  integrity sha512-gffT3xPz9sR7j/YJExkyPntrI0P2EP9XbOyWzth2/Gs0RstK+90RBcO0ncXoXy/beYll1SXw846Nf2zdnEz0QQ==
-
-"@typescript/typescript-linux-loong64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-linux-loong64/-/typescript-linux-loong64-7.0.2.tgz#2965aee4fc873360139d893daafe6397a29138ad"
-  integrity sha512-uEHck9i8hoAzXPiYRib1O7miOnz23SxIeVl6F4LXox+qov1K35jHcEW6VHKvZI+pyvl7fZEP4MCU5LYvIq1GuQ==
-
-"@typescript/typescript-linux-mips64el@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-linux-mips64el/-/typescript-linux-mips64el-7.0.2.tgz#1a887a311bed3a833f80bfd4a9ed37c271936cf0"
-  integrity sha512-R4KvAMnE43W5Qeqb0Ly56O3mWMWIAgsMyz36DCaycd5nbg/9kzm0liw3JocfRqyJY0KPmzFjbswozXyW0DnIYA==
-
-"@typescript/typescript-linux-ppc64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-linux-ppc64/-/typescript-linux-ppc64-7.0.2.tgz#8b63c9b2f445b393eb4e43ec21da225dade3577d"
-  integrity sha512-DORx5b3sd/4S7eayxm4FQv+A7CrkUIGRaHiwI8oiHTAI1fAPWhF4J0vAlkC8biAlHSVVwxMQ3tjZ2/DVbnQiiA==
-
-"@typescript/typescript-linux-riscv64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-linux-riscv64/-/typescript-linux-riscv64-7.0.2.tgz#b6e8a35c289b3ea97a92a41d461aaeed0d3b36e1"
-  integrity sha512-wf0jqEDOjrPRnKwYRyyJDRo11KMbvMFrU+q4zqKyChODBzvlkbhNQfKvLxQCcwTpdDaXSHZTVuh0JoCrKCUMHQ==
-
-"@typescript/typescript-linux-s390x@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-linux-s390x/-/typescript-linux-s390x-7.0.2.tgz#2ef96693be4861f6d17965427e5b009cbbed1a3e"
-  integrity sha512-IkwJc3L7yhytWd/ewjyxNDfOmswCm9GWMJT/ue/dU4aZNbwZeYAetq42VyLmsmSjvoX7z74X6ZaYCtzAr0EuGw==
-
-"@typescript/typescript-linux-x64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-linux-x64/-/typescript-linux-x64-7.0.2.tgz#73269cb0baba50aea0ca060445a6b88e583f1ce2"
-  integrity sha512-EYdf2cNg7rgCWJnxCdJ+F3V39O8ihb37eHAu1LK8oAFizgTQbPOK7zHHXbPt8rX24COqODXeI3sIf0fCXG7H/A==
-
-"@typescript/typescript-netbsd-arm64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-netbsd-arm64/-/typescript-netbsd-arm64-7.0.2.tgz#3a3649f97fafa210b4e6e3798c15e06605c8a901"
-  integrity sha512-+polYF4MF04aPpO5FTkHran9yUQDSXqy5GiSDKpsll5jy3l3+g9QLhpf39T+ePtefhXLOGrLl0QIjkQP6VnelA==
-
-"@typescript/typescript-netbsd-x64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-netbsd-x64/-/typescript-netbsd-x64-7.0.2.tgz#47ec59491a40c470d2807dc4d2b825528fd979ab"
-  integrity sha512-8YIT0EHM/3dq10ZOVF/A7pc/YSMtbcecct4rWtexrnSCHOPcpC2KTLXfTCR6vDpnSiY12heNb1GiN/wu+T/FyA==
-
-"@typescript/typescript-openbsd-arm64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-openbsd-arm64/-/typescript-openbsd-arm64-7.0.2.tgz#796be8da0bd989d8a3fb96f2801e38a8365b4baf"
-  integrity sha512-APT8+ClYnuYm1u9+kgGXoMj2VzWzcymwh2gNSQVySHfkRDGOTVkoWLjCmOQSaO+PoqQ57B0flRp9SA+7GnnkzQ==
-
-"@typescript/typescript-openbsd-x64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-openbsd-x64/-/typescript-openbsd-x64-7.0.2.tgz#d37fe2a729eb942c076c454ee7f1815faf7d560f"
-  integrity sha512-yX7s+Q0Dln0Dt9tEzZsAjXXR/+ytBM7AlglaqyeMPxQszJ1JhlJdZ6jLA+IzldHtflX81em7lDao1xXu+aRRkg==
-
-"@typescript/typescript-sunos-x64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-sunos-x64/-/typescript-sunos-x64-7.0.2.tgz#aba8d3464c3565a7044789baba96916bd4ab2c88"
-  integrity sha512-dLJDGaLZ1D4HPQn62u1n8mBDkJREwMsAkCdkwd4Ieqw+x3TUyTsqY0YiBCtE6H6OzzgGk3iuZ3vFWRS+E8/d1g==
-
-"@typescript/typescript-win32-arm64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-win32-arm64/-/typescript-win32-arm64-7.0.2.tgz#b9de50a17196383f62620b5f9d0a2f34ad3b60d7"
-  integrity sha512-Gyl1Vy6OsWesLzmq+EP0Fb7b4Nid5232AvcA2SFcdYreldpNtYFFofPjnt62y9hQy7VTaZp65ICJjuAQRaVcIQ==
-
-"@typescript/typescript-win32-x64@7.0.2":
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/@typescript/typescript-win32-x64/-/typescript-win32-x64-7.0.2.tgz#cf3b7b0d6ce5635daca4c8e01c189cdcde47ec3c"
-  integrity sha512-0BQ3HkAHHlKLSp1qRvf3SUhGpGsDuhB/jgFw75guyqbxJqEaS0Cw/VFO8i2nHglJUzQCRtMMR/IBAKE3ETMC4g==
-
 acorn-jsx@^5.3.2:
   version "5.3.2"
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.3.2.tgz#7ed5bb55908b3b2f1bc55c6af1653bada7f07937"
@@ -557,10 +451,10 @@ brace-expansion@^1.1.7:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
-brace-expansion@^5.0.8:
-  version "5.0.9"
-  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-5.0.9.tgz#7c72438809b5fa5babf54199a1f1c281a6984fcf"
-  integrity sha512-ScQ4IuvIEF1TMlP7Zt+vjJ//9zlPb2SDcxWxM3bk8s6t6GGdJ7KO1dCcTidOPJKePW30LE/2cT7wCyPho9/Wxg==
+brace-expansion@^5.0.2:
+  version "5.0.2"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-5.0.2.tgz#b6c16d0791087af6c2bc463f52a8142046c06b6f"
+  integrity sha512-Pdk8c9poy+YhOgVWw1JNN22/HcivgKWwpxKq04M/jTmHyCZn12WPJebZxdjSa5TmBqISrUSgNYU3eRORljfCCw==
   dependencies:
     balanced-match "^4.0.2"
 
@@ -881,15 +775,15 @@ eslint-visitor-keys@^5.0.0, eslint-visitor-keys@^5.0.1:
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz#9e3c9489697824d2d4ce3a8ad12628f91e9f59be"
   integrity sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==
 
-eslint@^10.8.0:
-  version "10.8.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.8.0.tgz#e6d19907a3f090a53a022261ba34c5ff6d04908b"
-  integrity sha512-nuKKvN+oIBO0koN7Tm7dlkmnkc21mtt0QJLwAKzjLq14y6lRTdVG36MZHJ8eQHwdJMwZbQNMlPOYedMq/oVJvQ==
+eslint@^10.4.1:
+  version "10.4.1"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.4.1.tgz#f6640b176e0912246d9ddbf8fcfa5e8b7f02445a"
+  integrity sha512-AyIKhnOBuOAdueD7RB3xB+YeAWScb9jHsJBgH2Hcde8InP5JYhqrRR6iTMHyTEwgENK54Cp44e4v8BwNhsuHuw==
   dependencies:
     "@eslint-community/eslint-utils" "^4.8.0"
     "@eslint-community/regexpp" "^4.12.2"
     "@eslint/config-array" "^0.23.5"
-    "@eslint/config-helpers" "^0.7.0"
+    "@eslint/config-helpers" "^0.6.0"
     "@eslint/core" "^1.2.1"
     "@eslint/plugin-kit" "^0.7.2"
     "@humanfs/node" "^0.16.6"
@@ -913,7 +807,7 @@ eslint@^10.8.0:
     imurmurhash "^0.1.4"
     is-glob "^4.0.0"
     json-stable-stringify-without-jsonify "^1.0.1"
-    minimatch "^10.2.5"
+    minimatch "^10.2.4"
     natural-compare "^1.4.0"
     optionator "^0.9.3"
 
@@ -1385,10 +1279,10 @@ js-tiktoken@^1.0.12:
   dependencies:
     base64-js "^1.5.1"
 
-js-yaml@^4.3.0:
-  version "4.3.1"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.3.1.tgz#01216c001d67f48e2cd560d708c7af21090a3848"
-  integrity sha512-CY6crGq313MX8GkwvB7tzgp99vjQxY1++5y10/BKN/GUfHqWaOGQMNZkBvqSzsZKWk/ijwHlWzzkLulsGHhjWQ==
+js-yaml@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.1.1.tgz#854c292467705b699476e1a2decc0c8a3458806b"
+  integrity sha512-qQKT4zQxXl8lLwBtHMWwaTcGfFOZviOJet3Oy/xmGk2gZH677CJM9EvtfdSkgWcATZhj/55JZ0rmy3myCT5lsA==
   dependencies:
     argparse "^2.0.1"
 
@@ -1448,12 +1342,12 @@ 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@^10.2.2, minimatch@^10.2.4, minimatch@^10.2.5:
-  version "10.2.6"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-10.2.6.tgz#fd956bbe0b77241e9f15ac5dccb1c638060968ef"
-  integrity sha512-vpLQEs+VLCr1nU0BXS07maYoFwlDAH0gngQuuttxIwutDFEMHq2blX+8vpgxDdK3J1PwjCJiep77OitTZ4Ll1A==
+minimatch@^10.2.2, minimatch@^10.2.4:
+  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 "^5.0.8"
+    brace-expansion "^5.0.2"
 
 minimatch@^3.1.2, minimatch@^3.1.5:
   version "3.1.5"
@@ -1652,10 +1546,10 @@ prettier-linter-helpers@^1.0.1:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@^3.9.6:
-  version "3.9.6"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.6.tgz#b3ea5146515d40fc53f18aa63f74dfab1e10dbf6"
-  integrity sha512-OpN0zzVdiaiAhxpuuj5efpIS4sY9j7bY6uR5mnj5yPzGkdkjNKSJeUThPb60Jw29QuAZgA4o+/iB49kFiaBX6g==
+prettier@^3.8.3:
+  version "3.8.3"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.8.3.tgz#560f2de55bf01b4c0503bc629d5df99b9a1d09b0"
+  integrity sha512-7igPTM53cGHMW8xWuVTydi2KO233VFiTNyF5hLJqpilHfmn8C8gPf+PS7dUT64YcXFbiMGZxS9pCSxL/Dxm/Jw==
 
 punycode@^2.1.0:
   version "2.3.1"
@@ -1908,17 +1802,17 @@ tsconfig-paths@^3.15.0:
     minimist "^1.2.6"
     strip-bom "^3.0.0"
 
-turbo@^2.10.8:
-  version "2.10.8"
-  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.10.8.tgz#09457cb7db79710586da455a29bccc05f15b1b72"
-  integrity sha512-9+8YX5QOkGXzZxcIykTHgaooRHGMWO+jfdyRK0o+rN0U7hBIig2MrJ8r/aNzIPDPhdA73SGb0O+tIztaModTMg==
+turbo@^2.9.16:
+  version "2.9.16"
+  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.9.16.tgz#ed72ff679c2c54bde0e3a2e40107416181e203a4"
+  integrity sha512-NqgRQy6j6dPYcdSdv0q1g9QsZg7SWg87RERM8otw/1AtKU2yTFVClOM7cbwKzOonZr/Ek1blTBucw64L9H0Bwg==
   optionalDependencies:
-    "@turbo/darwin-64" "2.10.8"
-    "@turbo/darwin-arm64" "2.10.8"
-    "@turbo/linux-64" "2.10.8"
-    "@turbo/linux-arm64" "2.10.8"
-    "@turbo/windows-64" "2.10.8"
-    "@turbo/windows-arm64" "2.10.8"
+    "@turbo/darwin-64" "2.9.16"
+    "@turbo/darwin-arm64" "2.9.16"
+    "@turbo/linux-64" "2.9.16"
+    "@turbo/linux-arm64" "2.9.16"
+    "@turbo/windows-64" "2.9.16"
+    "@turbo/windows-arm64" "2.9.16"
 
 type-check@^0.4.0, type-check@~0.4.0:
   version "0.4.0"
@@ -1972,31 +1866,10 @@ typed-array-length@^1.0.7:
     possible-typed-array-names "^1.0.0"
     reflect.getprototypeof "^1.0.6"
 
-typescript@^7.0.2:
-  version "7.0.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-7.0.2.tgz#9ec773d7954a8c182c17cc5bbd575aa28bc51582"
-  integrity sha512-8FYau96o3NKOhbjKi/qNvG/W5jhzxkbdm5sj9AbZ/5T5sWqn3hJgLfGx27sRKZWTvyzCP8dLRBTf5tBTSRVUNA==
-  optionalDependencies:
-    "@typescript/typescript-aix-ppc64" "7.0.2"
-    "@typescript/typescript-darwin-arm64" "7.0.2"
-    "@typescript/typescript-darwin-x64" "7.0.2"
-    "@typescript/typescript-freebsd-arm64" "7.0.2"
-    "@typescript/typescript-freebsd-x64" "7.0.2"
-    "@typescript/typescript-linux-arm" "7.0.2"
-    "@typescript/typescript-linux-arm64" "7.0.2"
-    "@typescript/typescript-linux-loong64" "7.0.2"
-    "@typescript/typescript-linux-mips64el" "7.0.2"
-    "@typescript/typescript-linux-ppc64" "7.0.2"
-    "@typescript/typescript-linux-riscv64" "7.0.2"
-    "@typescript/typescript-linux-s390x" "7.0.2"
-    "@typescript/typescript-linux-x64" "7.0.2"
-    "@typescript/typescript-netbsd-arm64" "7.0.2"
-    "@typescript/typescript-netbsd-x64" "7.0.2"
-    "@typescript/typescript-openbsd-arm64" "7.0.2"
-    "@typescript/typescript-openbsd-x64" "7.0.2"
-    "@typescript/typescript-sunos-x64" "7.0.2"
-    "@typescript/typescript-win32-arm64" "7.0.2"
-    "@typescript/typescript-win32-x64" "7.0.2"
+typescript@^6.0.3:
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-6.0.3.tgz#90251dc007916e972786cb94d74d15b185577d21"
+  integrity sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==
 
 unbox-primitive@^1.1.0:
   version "1.1.0"
@@ -2015,6 +1888,11 @@ uri-js@^4.2.2:
   dependencies:
     punycode "^2.1.0"
 
+uuid@^14.0.0:
+  version "14.0.0"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-14.0.0.tgz#0af883220163d264ffe0c084f6b8a89b9666966d"
+  integrity sha512-Qo+uWgilfSmAhXCMav1uYFynlQO7fMFiMVZsQqZRMIXp0O7rR7qjkj+cPvBHLgBqi960QCoo/PH2/6ZtVqKvrg==
+
 which-boxed-primitive@^1.1.0, which-boxed-primitive@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/which-boxed-primitive/-/which-boxed-primitive-1.1.1.tgz#d76ec27df7fa165f18d5808374a5fe23c29b176e"

libs/cli/langgraph_cli/__init__.py

@@ -1 +1 @@
-__version__ = "0.4.31"
+__version__ = "0.4.28"

libs/cli/langgraph_cli/cli.py

@@ -159,14 +159,7 @@ OPT_POSTGRES_URI = click.option(
 OPT_API_VERSION = click.option(
     "--api-version",
     type=str,
-    help=(
-        "API server version to use for the base image. If unspecified, the "
-        "latest stable version will be used. Compatible ranges like "
-        "~=0.11.0.dev5 stay on 0.11.0.dev5 while only newer dev builds exist, "
-        "then resolve to the newest matching rc or stable release, for example "
-        "0.11.0rc1 or 0.11.0. Stable-floating ranges like >~=0.11.0.dev5 "
-        "can also pick up future stable releases, for example 0.12.0."
-    ),
+    help="API server version to use for the base image. If unspecified, the latest version will be used.",
 )
 
 OPT_ENGINE_RUNTIME_MODE = click.option(
@@ -731,30 +724,6 @@ def dockerfile(
     default="WARNING",
     help="Set the log level for the API server.",
 )
-@click.option(
-    "--ssl-certfile",
-    type=click.Path(
-        exists=True,
-        file_okay=True,
-        dir_okay=False,
-        resolve_path=True,
-        path_type=pathlib.Path,
-    ),
-    default=None,
-    help="Path to an SSL certificate file for serving the development server over HTTPS.",
-)
-@click.option(
-    "--ssl-keyfile",
-    type=click.Path(
-        exists=True,
-        file_okay=True,
-        dir_okay=False,
-        resolve_path=True,
-        path_type=pathlib.Path,
-    ),
-    default=None,
-    help="Path to an SSL key file for serving the development server over HTTPS.",
-)
 @cli.command(
     "dev",
     help="🏃‍♀️‍➡️ Run LangGraph API server in development mode with hot reloading and debugging support",
@@ -773,20 +742,8 @@ def dev(
     allow_blocking: bool,
     tunnel: bool,
     server_log_level: str,
-    ssl_certfile: pathlib.Path | None,
-    ssl_keyfile: pathlib.Path | None,
 ):
     """CLI entrypoint for running the LangGraph API server."""
-    if (ssl_certfile is None) != (ssl_keyfile is None):
-        raise click.UsageError(
-            "Both --ssl-certfile and --ssl-keyfile must be provided to enable HTTPS."
-        )
-
-    if ssl_certfile and ssl_keyfile and tunnel:
-        raise click.UsageError(
-            "Cannot use --tunnel with SSL options. Please choose either to serve over HTTPS or to expose via a tunnel, but not both."
-        )
-
     try:
         from langgraph_api.cli import run_server  # type: ignore
     except ImportError:
@@ -857,8 +814,6 @@ def dev(
         server_level=server_log_level,
         checkpointer=config_json.get("checkpointer"),
         disable_persistence=config_json.get("disable_persistence", False),
-        ssl_certfile=ssl_certfile,
-        ssl_keyfile=ssl_keyfile,
     )
 
 

libs/cli/langgraph_cli/config.py

@@ -9,7 +9,6 @@ from collections import Counter
 from typing import Literal, NamedTuple
 
 import click
-import httpx
 
 from langgraph_cli.schemas import Config, Distros
 from langgraph_cli.uv_lock import python_config_to_docker_uv_lock
@@ -42,31 +41,6 @@ _API_VERSION_PATTERN = re.compile(
     r"(?:\.(?P<patch>\d+))?"
     r"(?:(?:\.|)(?:[A-Za-z][0-9A-Za-z]*))?$"
 )
-_API_VERSION_RANGE_PATTERN = re.compile(r"^(?P<operator>~=|>~=)\s*(?P<version>.+)$")
-_API_VERSION_PART_PATTERN = re.compile(
-    r"^(?P<major>\d+)"
-    r"(?:\.(?P<minor>\d+))?"
-    r"(?:\.(?P<patch>\d+))?"
-    r"(?:(?:\.|)(?P<pre>dev|rc)(?P<pre_n>\d+))?$"
-)
-
-
-class _ParsedApiVersion(NamedTuple):
-    release: tuple[int, ...]
-    prerelease: str | None
-    prerelease_number: int
-
-
-class _ApiVersionRange(NamedTuple):
-    floor: _ParsedApiVersion
-    allow_future_stable: bool
-
-
-_PRERELEASE_ORDER = {
-    "dev": 0,
-    "rc": 1,
-    None: 2,
-}
 
 
 def has_disallowed_build_command_content(command: str) -> bool:
@@ -167,133 +141,6 @@ def _parse_api_version_parts(version_str: str) -> tuple[int, ...]:
     return tuple(int(part) for part in match.groups() if part is not None)
 
 
-def _parse_api_version(version_str: str) -> _ParsedApiVersion:
-    match = _API_VERSION_PART_PATTERN.fullmatch(version_str)
-    if not match:
-        raise ValueError("Version must be major or major.minor or major.minor.patch.")
-    release = tuple(
-        int(part)
-        for part in (
-            match.group("major"),
-            match.group("minor"),
-            match.group("patch"),
-        )
-        if part is not None
-    )
-    prerelease = match.group("pre")
-    prerelease_number = int(match.group("pre_n") or 0)
-    return _ParsedApiVersion(release, prerelease, prerelease_number)
-
-
-def _api_version_sort_key(
-    version: _ParsedApiVersion,
-) -> tuple[tuple[int, ...], int, int]:
-    return (
-        version.release,
-        _PRERELEASE_ORDER[version.prerelease],
-        version.prerelease_number,
-    )
-
-
-def _api_version_upper_bound(version: _ParsedApiVersion) -> tuple[int, ...]:
-    release = version.release
-    if len(release) <= 2:
-        return (release[0] + 1,)
-    return (release[0], release[1] + 1)
-
-
-def _is_compatible_api_version_candidate(
-    candidate: _ParsedApiVersion,
-    version_range: _ApiVersionRange,
-    upper_bound: tuple[int, ...],
-) -> bool:
-    floor = version_range.floor
-    if _api_version_sort_key(candidate) < _api_version_sort_key(floor):
-        return False
-    outside_compatible_range = candidate.release[: len(upper_bound)] >= upper_bound
-    if outside_compatible_range and not version_range.allow_future_stable:
-        return False
-    if outside_compatible_range and candidate.prerelease is not None:
-        return False
-    if floor.prerelease == "dev" and candidate.prerelease == "dev":
-        return candidate == floor
-    return True
-
-
-def _ensure_compatible_api_version_base_image(base_image: str) -> None:
-    if ":" in base_image:
-        raise click.UsageError(
-            "Compatible api_version ranges cannot be used with a tagged base_image."
-        )
-
-
-def _get_pypi_versions(package_name: str) -> list[str]:
-    try:
-        response = httpx.get(
-            f"https://pypi.org/pypi/{package_name}/json",
-            timeout=10,
-        )
-        response.raise_for_status()
-    except httpx.HTTPError as exc:
-        raise click.UsageError(
-            f"Failed to fetch PyPI versions for {package_name}: {exc}"
-        ) from None
-    payload = response.json()
-    releases = payload.get("releases", {})
-    if not isinstance(releases, dict):
-        raise click.UsageError(
-            f"Failed to fetch PyPI versions for {package_name}: invalid response."
-        )
-    return [version for version in releases if isinstance(version, str)]
-
-
-def _resolve_compatible_api_version(
-    api_version: str,
-    base_image: str,
-    version_distro_tag: str,
-) -> str:
-    match = _API_VERSION_RANGE_PATTERN.fullmatch(api_version)
-    if not match:
-        return api_version
-
-    floor_str = match.group("version").strip()
-    try:
-        floor = _parse_api_version(floor_str)
-    except ValueError:
-        raise click.UsageError(
-            f"Invalid compatible api_version range: {api_version}.\n\n"
-            "Use a compatible version range, e.g.:\n"
-            '  "api_version": "~=0.11.0.dev5"\n'
-            "or a stable-floating range, e.g.:\n"
-            '  "api_version": ">~=0.11.0.dev5"'
-        ) from None
-
-    version_range = _ApiVersionRange(
-        floor=floor,
-        allow_future_stable=match.group("operator") == ">~=",
-    )
-    _ensure_compatible_api_version_base_image(base_image)
-    pypi_versions = _get_pypi_versions("langgraph-api")
-
-    candidates: list[tuple[_ParsedApiVersion, str]] = []
-    upper_bound = _api_version_upper_bound(floor)
-    for candidate_str in pypi_versions:
-        try:
-            candidate = _parse_api_version(candidate_str)
-        except ValueError:
-            continue
-        if _is_compatible_api_version_candidate(candidate, version_range, upper_bound):
-            candidates.append((candidate, candidate_str))
-
-    if not candidates:
-        raise click.UsageError(
-            f"No PyPI releases match compatible api_version range {api_version!r} "
-            f"for {base_image} with {version_distro_tag!r}."
-        )
-
-    return max(candidates, key=lambda item: _api_version_sort_key(item[0]))[1]
-
-
 def _is_node_graph(spec: str | dict) -> bool:
     """Check if a graph is a Node.js graph based on the file extension."""
     if isinstance(spec, dict):
@@ -347,12 +194,7 @@ def validate_config(config: Config) -> Config:
             )
     if api_version:
         try:
-            compatible_match = _API_VERSION_RANGE_PATTERN.fullmatch(api_version)
-            parts = _parse_api_version_parts(
-                compatible_match.group("version").strip()
-                if compatible_match
-                else api_version
-            )
+            parts = _parse_api_version_parts(api_version)
             if len(parts) > 3:
                 raise ValueError(
                     "Version must be major or major.minor or major.minor.patch."
@@ -1588,9 +1430,6 @@ def docker_tag(
 
     # Prepend API version if provided
     if api_version:
-        api_version = _resolve_compatible_api_version(
-            api_version, base_image, f"{language}{version_distro_tag}"
-        )
         full_tag = f"{api_version}-{language}{version_distro_tag}"
     elif "/langgraph-server" in base_image and version_distro_tag not in base_image:
         return f"{base_image}-{language}{version_distro_tag}"

libs/cli/langgraph_cli/deploy.py

@@ -366,42 +366,6 @@ def normalize_image_tag(value: str) -> str:
     return value
 
 
-def _validate_prebuilt_image(runner, image: str, *, verbose: bool) -> None:
-    """Ensure a prebuilt image exists locally for linux/amd64."""
-    try:
-        stdout, _ = runner.run(
-            subp_exec(
-                "docker",
-                "image",
-                "inspect",
-                "--format",
-                "{{.Os}}/{{.Architecture}}",
-                image,
-                verbose=verbose,
-                collect=True,
-            )
-        )
-    except FileNotFoundError:
-        raise click.ClickException(
-            "Docker is required but not installed.\n"
-            "Install Docker Desktop: https://docs.docker.com/get-docker/"
-        ) from None
-    except click.exceptions.Exit:
-        raise click.ClickException(
-            f"Docker image '{image}' was not found locally. Build or pull the image "
-            "before deploying with --image."
-        ) from None
-
-    image_platform = (stdout or "").strip()
-    if image_platform != "linux/amd64":
-        detected = image_platform or "unknown"
-        raise click.ClickException(
-            f"Docker image '{image}' targets {detected}, but LangSmith Deployment "
-            "requires linux/amd64. Rebuild or pull the image for linux/amd64 before "
-            "deploying with --image."
-        )
-
-
 def _extract_deployment_url(deployment: dict[str, object]) -> str:
     source_config = deployment.get("source_config")
     if isinstance(source_config, dict):
@@ -561,18 +525,12 @@ def _secrets_from_env(
 
 def _resolve_build_mode(
     remote_build_flag: bool | None,
-    *,
-    force_local: bool = False,
 ) -> tuple[bool, str | None]:
     """Determine whether to use a remote build.
 
     Returns (use_remote_build, local_build_error).  Raises UsageError when
-    --no-remote is set but the machine cannot build locally. When
-    `force_local` is set, the function short-circuits and always selects a
-    local build.
+    --no-remote is set but the machine cannot build locally.
     """
-    if force_local:
-        return False, None
     local_build_supported, local_build_error = can_build_locally()
 
     if remote_build_flag is True:
@@ -939,7 +897,6 @@ def _run_local_build(
     api_version: str | None,
     base_image: str | None,
     image_name: str | None,
-    prebuilt_image: str | None,
     name: str | None,
     tag: str,
     install_command: str | None,
@@ -953,57 +910,51 @@ def _run_local_build(
     # (e.g. Apple Silicon). On amd64 hosts, plain docker build is sufficient.
     needs_buildx = platform.machine() != "x86_64"
     local_tag = f"langgraph-deploy-tmp:{int(time.time())}"
-    image_to_push = prebuilt_image or local_tag
 
     with Runner() as runner:
-        if prebuilt_image:
-            _log_deploy_step(step, f"Validating image {prebuilt_image}")
-            _validate_prebuilt_image(runner, prebuilt_image, verbose=verbose)
-            click.secho("   Image is available for linux/amd64", fg="green")
+        # -- Step: Build image --
+        _log_deploy_step(step, "Building image")
+        if needs_buildx:
+            build_flags: list[str] = [
+                "--platform",
+                "linux/amd64",
+                "--load",
+            ]
+            if not verbose:
+                build_flags.append("--progress=quiet")
+            with Progress(message="Building...", elapsed=not verbose):
+                build_docker_image(
+                    runner,
+                    lambda _msg: None,
+                    config,
+                    config_json,
+                    base_image,
+                    api_version,
+                    pull,
+                    local_tag,
+                    docker_build_args,
+                    install_command,
+                    build_command,
+                    docker_command=("docker", "buildx", "build"),
+                    extra_flags=build_flags,
+                    verbose=verbose,
+                )
         else:
-            # -- Step: Build image --
-            _log_deploy_step(step, "Building image")
-            if needs_buildx:
-                build_flags: list[str] = [
-                    "--platform",
-                    "linux/amd64",
-                    "--load",
-                ]
-                if not verbose:
-                    build_flags.append("--progress=quiet")
-                with Progress(message="Building...", elapsed=not verbose):
-                    build_docker_image(
-                        runner,
-                        lambda _msg: None,
-                        config,
-                        config_json,
-                        base_image,
-                        api_version,
-                        pull,
-                        local_tag,
-                        docker_build_args,
-                        install_command,
-                        build_command,
-                        docker_command=("docker", "buildx", "build"),
-                        extra_flags=build_flags,
-                        verbose=verbose,
-                    )
-            else:
-                with Progress(message="Building...", elapsed=not verbose):
-                    build_docker_image(
-                        runner,
-                        lambda _msg: None,
-                        config,
-                        config_json,
-                        base_image,
-                        api_version,
-                        pull,
-                        local_tag,
-                        docker_build_args,
-                        install_command,
-                        build_command,
-                        verbose=verbose,
-                    )
+            with Progress(message="Building...", elapsed=not verbose):
+                build_docker_image(
+                    runner,
+                    lambda _msg: None,
+                    config,
+                    config_json,
+                    base_image,
+                    api_version,
+                    pull,
+                    local_tag,
+                    docker_build_args,
+                    install_command,
+                    build_command,
+                    verbose=verbose,
+                )
         step += 1
 
         # -- Step: Get push token and authenticate --
@@ -1072,7 +1023,7 @@ def _run_local_build(
                 subp_exec(
                     "docker",
                     "tag",
-                    image_to_push,
+                    local_tag,
                     remote_image,
                     verbose=verbose,
                 )
@@ -1472,13 +1423,6 @@ def _deploy_base_options(
                 show_default=True,
                 help="Tag to use for the pushed deployment image.",
             ),
-            click.option(
-                "--image",
-                help=(
-                    "Use an existing local image reference (e.g. repo:tag) and "
-                    "skip building. The image must target linux/amd64."
-                ),
-            ),
             click.option(
                 "--config",
                 "-c",
@@ -1579,7 +1523,6 @@ def _deploy_cmd(
     deployment_type: str,
     name: str | None,
     image_name: str | None,
-    image: str | None,
     tag: str,
     base_image: str | None,
     install_command: str | None,
@@ -1626,12 +1569,7 @@ def _deploy_cmd(
 
     secrets = _secrets_from_env(_env_without_deployment_name(env_vars))
 
-    if image and remote_build_flag is True:
-        raise click.UsageError("--image cannot be combined with --remote builds.")
-
-    use_remote_build, local_build_error = _resolve_build_mode(
-        remote_build_flag, force_local=image is not None
-    )
+    use_remote_build, local_build_error = _resolve_build_mode(remote_build_flag)
     if use_remote_build and remote_build_flag is None and local_build_error:
         em.note(f"{local_build_error}\nUsing remote build instead.")
         if not json_output:
@@ -1701,7 +1639,6 @@ def _deploy_cmd(
             api_version=api_version,
             base_image=base_image,
             image_name=image_name,
-            prebuilt_image=image,
             name=name,
             tag=tag,
             install_command=install_command,
@@ -1786,12 +1723,8 @@ def deploy_list(api_key: str | None, host_url: str | None, name_contains: str) -
         client,
         lambda c: c.list_deployments(name_contains=name_contains),
     )
-    resources = response.get("resources") if isinstance(response, dict) else None
-    deployments = (
-        [item for item in resources if isinstance(item, dict)]
-        if isinstance(resources, list)
-        else []
-    )
+    resources = response.get("resources", []) if isinstance(response, dict) else []
+    deployments = [item for item in resources if isinstance(item, dict)]
     if not deployments:
         click.echo("No deployments found.")
         return
@@ -1835,12 +1768,8 @@ def deploy_revisions_list(
         client,
         lambda c: c.list_revisions(deployment_id, limit=limit),
     )
-    resources = response.get("resources") if isinstance(response, dict) else None
-    revisions = (
-        [item for item in resources if isinstance(item, dict)]
-        if isinstance(resources, list)
-        else []
-    )
+    resources = response.get("resources", []) if isinstance(response, dict) else []
+    revisions = [item for item in resources if isinstance(item, dict)]
     if not revisions:
         click.echo(f"No revisions found for deployment {deployment_id}.")
         return

libs/cli/pyproject.toml

@@ -23,7 +23,7 @@ dependencies = [
 path = "langgraph_cli/__init__.py"
 [project.optional-dependencies]
 inmem = [
-    "langgraph-api>=0.5.35,<1.0.0 ; python_version >= '3.11'",
+    "langgraph-api>=0.5.35,<0.10.0 ; python_version >= '3.11'",
     "langgraph-runtime-inmem>=0.7 ; python_version >= '3.11'",
 ]
 
@@ -72,15 +72,9 @@ lint.select = [
   "UP", # pyupgrade
   "B",  # flake8-bugbear
   "I",  # isort
-  "PLC0415",  # import-outside-top-level
-  "RUF100",  # unused noqa directive
   "UP", # pyupgrade
 ]
 lint.ignore = ["E501", "B008"]
-# PLC0415 (import-outside-top-level) is enforced in tests only. Library code
-# still has deferred imports that have not been reviewed, so it stays exempt
-# for now.
-lint.per-file-ignores = { "langgraph_cli/**" = ["PLC0415"], "generate_schema.py" = ["PLC0415"] }
 target-version = "py310"
 
 [tool.ty.rules]

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

@@ -320,31 +320,6 @@ def test_top_level_help_truncates_command_descriptions_to_single_line() -> None:
     assert "[Beta] List LangSmith Deployments." in deploy_list_line
 
 
-def test_dev_command_requires_ssl_certfile_and_keyfile_together(tmp_path) -> None:
-    config_path = tmp_path / "langgraph.json"
-    config_path.write_text(
-        json.dumps({"dependencies": [], "graphs": {"agent": "./agent.py:graph"}}),
-        encoding="utf-8",
-    )
-    certfile = tmp_path / "cert.pem"
-    certfile.write_text("cert", encoding="utf-8")
-
-    runner = CliRunner()
-    result = runner.invoke(
-        cli,
-        [
-            "dev",
-            "--config",
-            str(config_path),
-            "--ssl-certfile",
-            str(certfile),
-        ],
-    )
-
-    assert result.exit_code != 0
-    assert "Both --ssl-certfile and --ssl-keyfile must be provided" in result.output
-
-
 def test_deploy_list_command(monkeypatch) -> None:
     runner = CliRunner()
     captured: dict[str, str] = {}

libs/cli/tests/unit_tests/test_archive.py

@@ -11,7 +11,6 @@ from langgraph_cli.archive import (
     _tar_filter,
     create_archive,
 )
-from langgraph_cli.config import LocalDeps
 
 # ---------------------------------------------------------------------------
 # _tar_filter
@@ -199,6 +198,7 @@ class TestCreateArchive:
 
     @patch("langgraph_cli.archive._assemble_local_deps")
     def test_yields_archive_with_config(self, mock_deps, tmp_path):
+        from langgraph_cli.config import LocalDeps
 
         config_file = self._make_project(tmp_path)
         mock_deps.return_value = LocalDeps(
@@ -218,6 +218,7 @@ class TestCreateArchive:
 
     @patch("langgraph_cli.archive._assemble_local_deps")
     def test_excludes_pycache(self, mock_deps, tmp_path):
+        from langgraph_cli.config import LocalDeps
 
         config_file = self._make_project(tmp_path)
         mock_deps.return_value = LocalDeps(
@@ -231,6 +232,7 @@ class TestCreateArchive:
 
     @patch("langgraph_cli.archive._assemble_local_deps")
     def test_cleans_up_tmp_dir_on_normal_exit(self, mock_deps, tmp_path):
+        from langgraph_cli.config import LocalDeps
 
         config_file = self._make_project(tmp_path)
         mock_deps.return_value = LocalDeps(
@@ -245,6 +247,7 @@ class TestCreateArchive:
 
     @patch("langgraph_cli.archive._assemble_local_deps")
     def test_cleans_up_tmp_dir_on_exception(self, mock_deps, tmp_path):
+        from langgraph_cli.config import LocalDeps
 
         config_file = self._make_project(tmp_path)
         mock_deps.return_value = LocalDeps(
@@ -261,6 +264,7 @@ class TestCreateArchive:
     @patch("langgraph_cli.archive._assemble_local_deps")
     @patch("langgraph_cli.archive._MAX_SIZE", 10)
     def test_raises_on_oversized_archive(self, mock_deps, tmp_path):
+        from langgraph_cli.config import LocalDeps
 
         config_file = self._make_project(tmp_path)
         mock_deps.return_value = LocalDeps(
@@ -274,6 +278,7 @@ class TestCreateArchive:
     @patch("langgraph_cli.archive._assemble_local_deps")
     def test_handles_extra_contexts(self, mock_deps, tmp_path):
         """Monorepo case: project + sibling dependency directory."""
+        from langgraph_cli.config import LocalDeps
 
         project = tmp_path / "myproject"
         project.mkdir()

libs/cli/tests/unit_tests/test_config.py

@@ -2961,163 +2961,6 @@ def test_docker_tag_with_prerelease_api_version(version: str, in_config: bool):
     assert tag == f"langchain/langgraph-api:{version}-py3.11"
 
 
-def test_docker_tag_with_compatible_api_version_promotes_to_latest_patch():
-    config = validate_config(
-        {
-            "python_version": "3.12",
-            "dependencies": ["."],
-            "graphs": {"agent": "./agent.py:graph"},
-            "image_distro": "wolfi",
-            "api_version": "~=0.11.0.dev5",
-        }
-    )
-
-    with patch(
-        "langgraph_cli.config._get_pypi_versions",
-        return_value=[
-            "0.11.0.dev5",
-            "0.11.0.dev6",
-            "0.11.0rc1",
-            "0.11.0",
-            "0.11.1rc1",
-            "0.11.1",
-            "0.12.0rc1",
-        ],
-    ) as get_versions:
-        tag = docker_tag(config)
-
-    get_versions.assert_called_once_with("langgraph-api")
-    assert tag == "langchain/langgraph-api:0.11.1-py3.12-wolfi"
-
-
-def test_docker_tag_with_compatible_api_version_freezes_dev_until_rc():
-    config = validate_config(
-        {
-            "python_version": "3.12",
-            "dependencies": ["."],
-            "graphs": {"agent": "./agent.py:graph"},
-            "api_version": "~=0.11.0.dev5",
-        }
-    )
-
-    with patch(
-        "langgraph_cli.config._get_pypi_versions",
-        return_value=[
-            "0.11.0.dev5",
-            "0.11.0.dev6",
-            "0.11.0.dev7",
-        ],
-    ):
-        tag = docker_tag(config)
-
-    assert tag == "langchain/langgraph-api:0.11.0.dev5-py3.12"
-
-
-def test_docker_tag_with_stable_floating_api_version_promotes_to_future_stable():
-    config = validate_config(
-        {
-            "python_version": "3.12",
-            "dependencies": ["."],
-            "graphs": {"agent": "./agent.py:graph"},
-            "image_distro": "wolfi",
-            "api_version": ">~=0.11.0.dev5",
-        }
-    )
-
-    with patch(
-        "langgraph_cli.config._get_pypi_versions",
-        return_value=[
-            "0.11.0.dev5",
-            "0.11.0.dev6",
-            "0.11.0rc1",
-            "0.11.0",
-            "0.11.1",
-            "0.12.0rc1",
-            "0.12.0",
-            "0.13.0.dev1",
-            "0.13.0",
-        ],
-    ) as get_versions:
-        tag = docker_tag(config)
-
-    get_versions.assert_called_once_with("langgraph-api")
-    assert tag == "langchain/langgraph-api:0.13.0-py3.12-wolfi"
-
-
-def test_docker_tag_with_stable_floating_api_version_ignores_future_prereleases():
-    config = validate_config(
-        {
-            "python_version": "3.12",
-            "dependencies": ["."],
-            "graphs": {"agent": "./agent.py:graph"},
-            "api_version": ">~=0.11.0.dev5",
-        }
-    )
-
-    with patch(
-        "langgraph_cli.config._get_pypi_versions",
-        return_value=[
-            "0.11.0.dev5",
-            "0.11.0",
-            "0.12.0rc1",
-            "0.12.0.dev1",
-        ],
-    ):
-        tag = docker_tag(config)
-
-    assert tag == "langchain/langgraph-api:0.11.0-py3.12"
-
-
-def test_validate_config_rejects_unrecognized_api_version_range_operator():
-    with pytest.raises(click.UsageError, match="Invalid version format"):
-        validate_config(
-            {
-                "python_version": "3.12",
-                "dependencies": ["."],
-                "graphs": {"agent": "./agent.py:graph"},
-                "api_version": "~>=0.11.0.dev5",
-            }
-        )
-
-
-def test_docker_tag_with_compatible_api_version_supports_node_images():
-    config = validate_config(
-        {
-            "node_version": "20",
-            "graphs": {"agent": "./agent.js:graph"},
-            "image_distro": "wolfi",
-            "api_version": "~=1.2.4",
-        }
-    )
-
-    with patch(
-        "langgraph_cli.config._get_pypi_versions",
-        return_value=[
-            "1.2.4",
-            "1.2.5",
-            "1.3.0",
-        ],
-    ) as get_versions:
-        tag = docker_tag(config)
-
-    get_versions.assert_called_once_with("langgraph-api")
-    assert tag == "langchain/langgraphjs-api:1.2.5-node20-wolfi"
-
-
-def test_docker_tag_with_compatible_api_version_rejects_tagged_base_image():
-    config = validate_config(
-        {
-            "python_version": "3.11",
-            "dependencies": ["."],
-            "graphs": {"agent": "./agent.py:graph"},
-            "api_version": "~=0.11.0.dev5",
-        }
-    )
-
-    with pytest.raises(click.UsageError, match="tagged base_image"):
-        docker_tag(config, base_image="langchain/langgraph-api:0.11.0")
-
-
 def test_config_to_docker_with_api_version():
     """Test config_to_docker function with api_version parameter."""
 

libs/cli/tests/unit_tests/test_deploy_helpers.py

@@ -1,4 +1,3 @@
-import asyncio
 import base64
 import io
 import json
@@ -7,11 +6,9 @@ import sys
 from unittest.mock import MagicMock
 
 import click
-import click.exceptions
 import httpx
 import pytest
 
-import langgraph_cli.deploy as deploy_mod
 from langgraph_cli.deploy import (
     _call_host_backend_with_optional_tenant,
     _create_host_backend_client,
@@ -22,7 +19,6 @@ from langgraph_cli.deploy import (
     _resolve_env_path,
     _resolve_pushed_image_digest,
     _smith_dashboard_base_url,
-    _validate_prebuilt_image,
     normalize_image_tag,
     normalize_name,
 )
@@ -99,65 +95,6 @@ class TestNormalizeImageTag:
             normalize_image_tag("has space")
 
 
-class _FakeRunner:
-    def run(self, coro):
-        return asyncio.run(coro)
-
-
-class TestValidatePrebuiltImage:
-    def test_accepts_linux_amd64(self, monkeypatch):
-        calls = []
-
-        async def fake_subp_exec(*args, **kwargs):
-            calls.append((args, kwargs))
-            return "linux/amd64\n", None
-
-        monkeypatch.setattr(deploy_mod, "subp_exec", fake_subp_exec)
-
-        _validate_prebuilt_image(_FakeRunner(), "repo/app:tag", verbose=False)
-
-        assert calls == [
-            (
-                (
-                    "docker",
-                    "image",
-                    "inspect",
-                    "--format",
-                    "{{.Os}}/{{.Architecture}}",
-                    "repo/app:tag",
-                ),
-                {"verbose": False, "collect": True},
-            )
-        ]
-
-    def test_missing_docker_binary_raises_actionable_error(self, monkeypatch):
-        async def fake_subp_exec(*args, **kwargs):
-            raise FileNotFoundError("docker")
-
-        monkeypatch.setattr(deploy_mod, "subp_exec", fake_subp_exec)
-
-        with pytest.raises(click.ClickException, match="Docker is required"):
-            _validate_prebuilt_image(_FakeRunner(), "repo/app:tag", verbose=False)
-
-    def test_missing_image_raises_actionable_error(self, monkeypatch):
-        async def fake_subp_exec(*args, **kwargs):
-            raise click.exceptions.Exit(1)
-
-        monkeypatch.setattr(deploy_mod, "subp_exec", fake_subp_exec)
-
-        with pytest.raises(click.ClickException, match="not found locally"):
-            _validate_prebuilt_image(_FakeRunner(), "missing:tag", verbose=False)
-
-    def test_rejects_non_amd64_platform(self, monkeypatch):
-        async def fake_subp_exec(*args, **kwargs):
-            return "linux/arm64\n", None
-
-        monkeypatch.setattr(deploy_mod, "subp_exec", fake_subp_exec)
-
-        with pytest.raises(click.ClickException, match="requires linux/amd64"):
-            _validate_prebuilt_image(_FakeRunner(), "repo/app:arm", verbose=False)
-
-
 class TestParseEnvFromConfig:
     def test_env_dict(self, tmp_path):
         config_path = tmp_path / "langgraph.json"
@@ -347,6 +284,7 @@ class TestCallHostBackendWithOptionalTenant:
 
     def test_workspace_prompt_blocked_by_no_input(self, monkeypatch):
         """With _no_input=True, 403 requiring workspace should raise ClickException."""
+        import langgraph_cli.deploy as deploy_mod
 
         monkeypatch.setattr(deploy_mod, "_no_input", True)
 
@@ -514,6 +452,7 @@ class TestEmitterTextMode:
 
 class TestCreateHostBackendClientNoInput:
     def test_raises_when_no_api_key_and_no_input(self, monkeypatch, tmp_path):
+        import langgraph_cli.deploy as deploy_mod
 
         monkeypatch.setattr(deploy_mod, "_no_input", True)
         monkeypatch.delenv("LANGSMITH_API_KEY", raising=False)
@@ -528,6 +467,7 @@ class TestCreateHostBackendClientNoInput:
             )
 
     def test_succeeds_with_api_key_in_env(self, monkeypatch, tmp_path):
+        import langgraph_cli.deploy as deploy_mod
 
         monkeypatch.setattr(deploy_mod, "_no_input", True)
         monkeypatch.setenv("LANGSMITH_API_KEY", "lsv2_test")

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

@@ -237,14 +237,14 @@ wheels = [
 
 [[package]]
 name = "langchain-protocol"
-version = "0.0.17"
+version = "0.0.15"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/44/b3/4e2429876c7a35585618caa2b9f9089f7162a6b50562b614ad82ac11c17e/langchain_protocol-0.0.17.tar.gz", hash = "sha256:e7cbe58c205df4b4fd87dc6d5bb23f10e13b236d0e2e1b0b9d05bc2b648f3eea", size = 6026, upload-time = "2026-06-12T18:39:51.923Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/4f/24/9777489d6fbbee64af0c8f96d4f840239c408cf694f3394672807dafc490/langchain_protocol-0.0.15.tar.gz", hash = "sha256:9ab2d11ee73944754f10e037e717098d3a6796f0e58afa9cadda6154e7655ade", size = 5862, upload-time = "2026-05-01T22:30:04.748Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/13/0a/a1bfe72c6ec856e99773bbd96c8086421e554b3693d0142b9ea009c6ac92/langchain_protocol-0.0.17-py3-none-any.whl", hash = "sha256:982a08fe152586ed10d4ff3d538c2e0b5766e5f307cdea325e10be3f2c17cae6", size = 7096, upload-time = "2026-06-12T18:39:50.973Z" },
+    { url = "https://files.pythonhosted.org/packages/1d/7a/9c97a7b9cbe4c5dc6a44cdb1545450c28f0c8ce89b9c1f0ee7fbad896263/langchain_protocol-0.0.15-py3-none-any.whl", hash = "sha256:461eb794358f83d5e42635a5797799ffec7b4702314e34edf73ac21e75d3ef79", size = 6982, upload-time = "2026-05-01T22:30:03.877Z" },
 ]
 
 [[package]]

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

@@ -211,14 +211,14 @@ wheels = [
 
 [[package]]
 name = "langchain-protocol"
-version = "0.0.17"
+version = "0.0.15"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/44/b3/4e2429876c7a35585618caa2b9f9089f7162a6b50562b614ad82ac11c17e/langchain_protocol-0.0.17.tar.gz", hash = "sha256:e7cbe58c205df4b4fd87dc6d5bb23f10e13b236d0e2e1b0b9d05bc2b648f3eea", size = 6026, upload-time = "2026-06-12T18:39:51.923Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/4f/24/9777489d6fbbee64af0c8f96d4f840239c408cf694f3394672807dafc490/langchain_protocol-0.0.15.tar.gz", hash = "sha256:9ab2d11ee73944754f10e037e717098d3a6796f0e58afa9cadda6154e7655ade", size = 5862, upload-time = "2026-05-01T22:30:04.748Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/13/0a/a1bfe72c6ec856e99773bbd96c8086421e554b3693d0142b9ea009c6ac92/langchain_protocol-0.0.17-py3-none-any.whl", hash = "sha256:982a08fe152586ed10d4ff3d538c2e0b5766e5f307cdea325e10be3f2c17cae6", size = 7096, upload-time = "2026-06-12T18:39:50.973Z" },
+    { url = "https://files.pythonhosted.org/packages/1d/7a/9c97a7b9cbe4c5dc6a44cdb1545450c28f0c8ce89b9c1f0ee7fbad896263/langchain_protocol-0.0.15-py3-none-any.whl", hash = "sha256:461eb794358f83d5e42635a5797799ffec7b4702314e34edf73ac21e75d3ef79", size = 6982, upload-time = "2026-05-01T22:30:03.877Z" },
 ]
 
 [[package]]

libs/langgraph/README.md

@@ -1,45 +1,100 @@
-# 🦜🕸️ LangGraph
+<div align="center">
+  <a href="https://www.langchain.com/langgraph">
+    <picture>
+      <source media="(prefers-color-scheme: dark)" srcset="../../.github/images/logo-dark.svg">
+      <source media="(prefers-color-scheme: light)" srcset="../../.github/images/logo-light.svg">
+      <img alt="LangGraph Logo" src=".github/images/logo-dark.svg" width="50%">
+    </picture>
+  </a>
+</div>
 
-[![PyPI - Version](https://img.shields.io/pypi/v/langgraph?label=%20)](https://pypi.org/project/langgraph/#history)
-[![PyPI - License](https://img.shields.io/pypi/l/langgraph)](https://opensource.org/licenses/MIT)
-[![PyPI - Downloads](https://img.shields.io/pepy/dt/langgraph)](https://pypistats.org/packages/langgraph)
-[![Open Issues](https://img.shields.io/github/issues-raw/langchain-ai/langgraph)](https://github.com/langchain-ai/langgraph/issues)
-[![Twitter](https://img.shields.io/twitter/url/https/twitter.com/langchain_oss.svg?style=social&label=Follow%20%40LangChain)](https://x.com/langchain_oss)
+<div align="center">
+  <h3>Low-level orchestration framework for building stateful agents.</h3>
+</div>
 
-Looking for the JS/TS version? Check out [LangGraph.js](https://github.com/langchain-ai/langgraphjs).
+<div align="center">
+  <a href="https://opensource.org/licenses/MIT" target="_blank"><img src="https://img.shields.io/pypi/l/langgraph" alt="PyPI - License"></a>
+  <a href="https://pypistats.org/packages/langgraph" target="_blank"><img src="https://img.shields.io/pepy/dt/langgraph" alt="PyPI - Downloads"></a>
+  <a href="https://pypi.org/project/langgraph/" target="_blank"><img src="https://img.shields.io/pypi/v/langgraph.svg?label=%20" alt="Version"></a>
+  <a href="https://github.com/langchain-ai/langgraph/issues" target="_blank"><img src="https://img.shields.io/github/issues-raw/langchain-ai/langgraph" alt="Open Issues"></a>
+  <a href="https://docs.langchain.com/oss/python/langgraph/overview" target="_blank"><img src="https://img.shields.io/badge/docs-latest-blue" alt="Docs"></a>
+  <a href="https://x.com/langchain_oss" target="_blank"><img src="https://img.shields.io/twitter/url/https/twitter.com/langchain_oss.svg?style=social&label=Follow%20%40LangChain" alt="Twitter / X"></a>
+</div>
 
-To help you ship LangGraph apps to production faster, check out [LangSmith](https://www.langchain.com/langsmith).
-[LangSmith](https://www.langchain.com/langsmith) is a unified developer platform for building, testing, and monitoring LLM applications.
+<br>
 
-## Quick Install
+Trusted by companies shaping the future of agents – including Klarna, Replit, Elastic, and more – LangGraph is a low-level orchestration framework for building, managing, and deploying long-running, stateful agents.
 
-```bash
-uv add langgraph
+## Get started
+
+Install LangGraph:
+
+```
+pip install -U langgraph
 ```
 
-## 🤔 What is this?
+Create a simple workflow:
 
-LangGraph is a low-level orchestration framework for building, managing, and deploying long-running, stateful agents. LangGraph provides the infrastructure for durable execution, streaming, human-in-the-loop, persistence, memory, and more.
+```python
+from langgraph.graph import START, StateGraph
+from typing_extensions import TypedDict
 
-We recommend you use LangGraph when you have advanced needs that require a combination of deterministic and agentic workflows, heavy customization, and carefully controlled latency. Use [LangChain](https://docs.langchain.com/oss/python/langchain/overview) when you want to quickly build agents and applications powered by LLMs using pre-built agent architectures and model integrations.
 
-LangChain [agents](https://docs.langchain.com/oss/python/langchain/agents) are built on top of LangGraph in order to provide durable execution, streaming, human-in-the-loop, persistence, and more. (You do not need to know LangGraph for basic LangChain agent usage.)
+class State(TypedDict):
+    text: str
 
-Trusted by companies shaping the future of agents – including Klarna, Replit, Elastic, and more – LangGraph is used to ship AI applications at scale.
 
-## 📖 Documentation
+def node_a(state: State) -> dict:
+    return {"text": state["text"] + "a"}
 
-For full documentation, see the [API reference](https://reference.langchain.com/python/langgraph/). For conceptual guides, tutorials, and examples on using LangGraph, see the [LangGraph Docs](https://docs.langchain.com/oss/python/langgraph/overview). Get started with the [LangGraph Quickstart](https://docs.langchain.com/oss/python/langgraph/quickstart).
 
-## 📕 Releases & Versioning
+def node_b(state: State) -> dict:
+    return {"text": state["text"] + "b"}
 
-See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning](https://docs.langchain.com/oss/python/versioning) policies.
 
-## 💁 Contributing
+graph = StateGraph(State)
+graph.add_node("node_a", node_a)
+graph.add_node("node_b", node_b)
+graph.add_edge(START, "node_a")
+graph.add_edge("node_a", "node_b")
 
-As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
+print(graph.compile().invoke({"text": ""}))
+# {'text': 'ab'}
+```
 
-For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview).
+Get started with the [LangGraph Quickstart](https://docs.langchain.com/oss/python/langgraph/quickstart).
+
+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).
+
+## 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:
+
+- [Durable execution](https://docs.langchain.com/oss/python/langgraph/durable-execution): Build agents that persist through failures and can run for extended periods, automatically resuming from exactly where they left off.
+- [Human-in-the-loop](https://docs.langchain.com/oss/python/langgraph/interrupts): Seamlessly incorporate human oversight by inspecting and modifying agent state at any point during execution.
+- [Comprehensive memory](https://docs.langchain.com/oss/python/langgraph/memory): Create truly stateful agents with both short-term working memory for ongoing reasoning and long-term persistent memory across sessions.
+- [Debugging with LangSmith](http://www.langchain.com/langsmith): Gain deep visibility into complex agent behavior with visualization tools that trace execution paths, capture state transitions, and provide detailed runtime metrics.
+- [Production-ready deployment](https://docs.langchain.com/langsmith/app-development): Deploy sophisticated agent systems confidently with scalable infrastructure designed to handle the unique challenges of stateful, long-running workflows.
+
+## LangGraph’s ecosystem
+
+While LangGraph can be used standalone, it also integrates seamlessly with any LangChain product, giving developers a full suite of tools for building agents. To improve your LLM application development, pair LangGraph with:
+
+- [LangSmith](http://www.langchain.com/langsmith) — Helpful for agent evals and observability. Debug poor-performing LLM app runs, evaluate agent trajectories, gain visibility in production, and improve performance over time.
+- [LangSmith Deployment](https://docs.langchain.com/langsmith/deployments) — Deploy and scale agents effortlessly with a purpose-built deployment platform for long running, stateful workflows. Discover, reuse, configure, and share agents across teams — and iterate quickly with visual prototyping in [LangGraph Studio](https://docs.langchain.com/oss/python/langgraph/studio).
+- [LangChain](https://docs.langchain.com/oss/python/langchain/overview) – Provides integrations and composable components to streamline LLM application development.
+
+> [!NOTE]
+> Looking for the JS version of LangGraph? See the [JS repo](https://github.com/langchain-ai/langgraphjs) and the [JS docs](https://docs.langchain.com/oss/javascript/langgraph/overview).
+
+## Additional resources
+
+- [Guides](https://docs.langchain.com/oss/python/langgraph/guides): Quick, actionable code snippets for topics such as streaming, adding memory & persistence, and design patterns (e.g. branching, subgraphs, etc.).
+- [Reference](https://reference.langchain.com/python/langgraph/): Detailed reference on core classes, methods, how to use the graph and checkpointing APIs, and higher-level prebuilt components.
+- [Examples](https://docs.langchain.com/oss/python/langgraph/agentic-rag): Guided examples on getting started with LangGraph.
+- [LangChain Forum](https://forum.langchain.com/): Connect with the community and share all of your technical questions, ideas, and feedback.
+- [LangChain Academy](https://academy.langchain.com/courses/intro-to-langgraph): Learn the basics of LangGraph in our free, structured course.
+- [Case studies](https://www.langchain.com/built-with-langgraph): Hear how industry leaders use LangGraph to ship AI applications at scale.
 
 ## Acknowledgements
 

libs/langgraph/langgraph/_internal/_config.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from collections import ChainMap
-from collections.abc import Mapping, Sequence
+from collections.abc import Sequence
 from os import getenv
 from typing import Any, cast
 
@@ -20,7 +20,6 @@ from langchain_core.runnables.config import (
 from langgraph.checkpoint.base import CheckpointMetadata
 
 from langgraph._internal._constants import (
-    _CHECKPOINT_COORDINATE_KEYS,
     CONF,
     CONFIG_KEY_CHECKPOINT_ID,
     CONFIG_KEY_CHECKPOINT_MAP,
@@ -80,42 +79,6 @@ def patch_checkpoint_map(
         return config
 
 
-def _copy_mapping_value(value: Any) -> Any:
-    return dict(value) if isinstance(value, Mapping) else value
-
-
-def _merge_metadata(
-    base: Mapping[str, Any] | None, new: Mapping[str, Any] | None
-) -> dict[str, Any]:
-    """Merge metadata without mutating inputs.
-
-    Top-level keys merge with newer values winning. `lc_versions` is the only
-    mapping-valued key that merges one level deeper, so independent LangChain
-    packages can contribute package versions without changing generic metadata
-    semantics. Mapping values are copied one level, so deeper nested objects
-    remain shared. `None` inputs are treated as empty metadata.
-
-    Mirrors `langchain_core.runnables.config._merge_metadata_dicts` so configs
-    that pass through LangGraph's merge keep the same `lc_versions` semantics;
-    keep the two in sync. Unlike lc-core, this copies mapping values one level
-    (intentionally more defensive — do not "simplify" back to a shared ref).
-    """
-    merged = {key: _copy_mapping_value(value) for key, value in (base or {}).items()}
-    for key, value in (new or {}).items():
-        if (
-            key == "lc_versions"
-            and isinstance(merged.get(key), Mapping)
-            and isinstance(value, Mapping)
-        ):
-            merged[key] = {
-                **cast(Mapping[str, Any], merged[key]),
-                **value,
-            }
-        else:
-            merged[key] = _copy_mapping_value(value)
-    return merged
-
-
 def _merge_callbacks(base: Callbacks, new: Callbacks) -> Callbacks:
     """Merge two callbacks values (None / list / BaseCallbackManager).
 
@@ -163,10 +126,10 @@ def merge_configs(*configs: RunnableConfig | None) -> RunnableConfig:
             if not value:
                 continue
             if key == "metadata":
-                base[key] = _merge_metadata(
-                    cast(Mapping[str, Any] | None, base.get(key)),
-                    cast(Mapping[str, Any], value),
-                )
+                if base_value := base.get(key):
+                    base[key] = {**base_value, **value}  # type: ignore
+                else:
+                    base[key] = value  # type: ignore[literal-required]
             elif key == "tags":
                 if base_value := base.get(key):
                     base[key] = [*base_value, *value]  # type: ignore
@@ -343,28 +306,6 @@ def ensure_config(*configs: RunnableConfig | None) -> RunnableConfig:
                 if _is_not_empty(v)
             },
         )
-    # An explicit config that supplies its own checkpoint coordinate (a
-    # thread_id, or any checkpoint_ns/checkpoint_id/checkpoint_map) is addressing
-    # its own checkpoint lineage, so drop the inherited ambient configurable
-    # rather than merging over it: a child graph invoked inside a parent node
-    # would otherwise write its checkpoints under the parent's namespace and
-    # never find them again. An explicit thread_id resets even when it equals the
-    # ambient one, since a child reusing the parent's thread id still addresses
-    # its own root namespace, not the parent task's. Configs that only refine
-    # other keys keep the ambient and shallow-merge over it below.
-    if empty.get(CONF):
-        for config in configs:
-            if config is None:
-                continue
-            explicit_configurable = config.get(CONF)
-            if not explicit_configurable:
-                continue
-            if any(
-                _is_not_empty(explicit_configurable.get(k))
-                for k in _CHECKPOINT_COORDINATE_KEYS
-            ):
-                empty[CONF] = {}
-                break
     for config in configs:
         if config is None:
             continue
@@ -386,11 +327,14 @@ def ensure_config(*configs: RunnableConfig | None) -> RunnableConfig:
                         empty.get("callbacks"), cast(Callbacks, v)
                     )
                 elif k == "metadata":
-                    # Matches merge_configs: top-level metadata keys merge, and
-                    # only `lc_versions` merges one level deeper.
-                    empty["metadata"] = _merge_metadata(
-                        cast(Mapping[str, Any] | None, empty.get("metadata")),
-                        cast(Mapping[str, Any], v),
+                    # Shallow-merge metadata dicts across configs so values
+                    # bound via with_config(...) (e.g. user_id) are preserved
+                    # when later configs supply other metadata keys.
+                    existing = empty.get("metadata")
+                    empty["metadata"] = (
+                        {**cast(dict, existing), **cast(dict, v)}
+                        if existing
+                        else cast(dict, v).copy()
                     )
                 elif k == "tags":
                     # Concatenate tags across configs so values bound via

libs/langgraph/langgraph/_internal/_constants.py

@@ -95,15 +95,6 @@ NULL_TASK_ID = sys.intern("00000000-0000-0000-0000-000000000000")
 OVERWRITE = sys.intern("__overwrite__")
 # dict key for the overwrite value, used as `{'__overwrite__': value}`
 
-# Checkpoint coordinate keys: when any of these appear in an explicit
-# configurable, the caller is addressing its own checkpoint lineage.
-_CHECKPOINT_COORDINATE_KEYS = (
-    CONFIG_KEY_THREAD_ID,
-    CONFIG_KEY_CHECKPOINT_NS,
-    CONFIG_KEY_CHECKPOINT_ID,
-    CONFIG_KEY_CHECKPOINT_MAP,
-)
-
 # redefined to avoid circular import with langgraph.constants
 _TAG_HIDDEN = sys.intern("langsmith:hidden")
 

libs/langgraph/langgraph/_internal/_pydantic.py

@@ -68,7 +68,7 @@ def _create_root_model(
 
     def schema(
         cls: type[BaseModel],
-        by_alias: bool = True,
+        by_alias: bool = True,  # noqa: FBT001,FBT002
         ref_template: str = DEFAULT_REF_TEMPLATE,
     ) -> dict[str, Any]:
         # Complains about schema not being defined in superclass
@@ -80,7 +80,7 @@ def _create_root_model(
 
     def model_json_schema(
         cls: type[BaseModel],
-        by_alias: bool = True,
+        by_alias: bool = True,  # noqa: FBT001,FBT002
         ref_template: str = DEFAULT_REF_TEMPLATE,
         schema_generator: type[GenerateJsonSchema] = GenerateJsonSchema,
         mode: JsonSchemaMode = "validation",

libs/langgraph/langgraph/_internal/_serde.py

@@ -22,7 +22,7 @@ from pydantic import BaseModel
 from typing_extensions import NotRequired, Required, is_typeddict
 
 try:
-    from langgraph.checkpoint.serde._msgpack import (
+    from langgraph.checkpoint.serde._msgpack import (  # noqa: F401
         STRICT_MSGPACK_ENABLED,
     )
 except ImportError:

libs/langgraph/langgraph/channels/binop.py

@@ -29,25 +29,11 @@ def _strip_extras(t):  # type: ignore[no-untyped-def]
 
 
 def _get_overwrite(value: Any) -> tuple[bool, Any]:
-    """Inspects the given value and returns (is_overwrite, overwrite_value).
-
-    Recognises three forms:
-
-    * The typed `Overwrite` dataclass instance.
-    * The sentinel-keyed `{"__overwrite__": value}` dict form.
-    * The dataclass-erased `{"value": ..., "type": "__overwrite__"}` form that
-      results from JSON-serialising an `Overwrite` (e.g. an `orjson`-encoded
-      state update routed through the LangGraph API server). This keeps the
-      `Overwrite` semantics intact across JSON boundaries that strip dataclass
-      types.
-    """
+    """Inspects the given value and returns (is_overwrite, overwrite_value)."""
     if isinstance(value, Overwrite):
         return True, value.value
-    if isinstance(value, dict):
-        if len(value) == 1 and OVERWRITE in value:
-            return True, value[OVERWRITE]
-        if value.get("type") == OVERWRITE and "value" in value:
-            return True, value["value"]
+    if isinstance(value, dict) and len(value) == 1 and OVERWRITE in value:
+        return True, value[OVERWRITE]
     return False, None
 
 

libs/langgraph/langgraph/channels/delta.py

@@ -172,11 +172,13 @@ class DeltaChannel(Generic[Value], BaseChannel[Any, Any, Any]):
                 overwrite_idx = i
         if overwrite_idx is not None:
             _, overwrite_value = _get_overwrite(values[overwrite_idx])
-            self.value = (
+            base = (
                 _copy.copy(overwrite_value)
                 if overwrite_value is not None
                 else self.typ()
             )
+            remaining = [v for i, v in enumerate(values) if i != overwrite_idx]
+            self.value = self.reducer(base, remaining) if remaining else base
             return True
         base = self.typ() if self.value is MISSING else self.value
         self.value = self.reducer(base, list(values))

libs/langgraph/langgraph/errors.py

@@ -7,7 +7,7 @@ from typing import Any, Literal
 from warnings import warn
 
 # EmptyChannelError is re-exported from langgraph.channels.base
-from langgraph.checkpoint.base import EmptyChannelError
+from langgraph.checkpoint.base import EmptyChannelError  # noqa: F401
 from typing_extensions import deprecated
 
 from langgraph.types import Command, Interrupt

libs/langgraph/langgraph/graph/state.py

@@ -995,7 +995,7 @@ class StateGraph(Generic[StateT, ContextT, InputT, OutputT]):
             Without type hints on the `path` function's return value (e.g., `-> Literal["foo", "__end__"]:`)
             or a path_map, the graph visualization assumes the edge could transition to any node in the graph.
 
-        """
+        """  # noqa: E501
         if self.compiled:
             logger.warning(
                 "Adding an edge to a graph that has already been compiled. This will "

libs/langgraph/langgraph/pregel/_checkpoint.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
-import uuid
-from collections.abc import Callable, Iterable, Mapping
+from collections.abc import Callable, Mapping
 from datetime import datetime, timezone
 from typing import Any, cast
 
@@ -14,7 +13,6 @@ from langgraph.checkpoint.base.id import uuid6
 from langgraph.checkpoint.serde.types import _DeltaSnapshot
 
 from langgraph._internal._config import DELTA_MAX_SUPERSTEPS_SINCE_SNAPSHOT
-from langgraph._internal._constants import PUSH
 from langgraph._internal._typing import MISSING
 from langgraph.channels.base import BaseChannel
 from langgraph.channels.delta import DeltaChannel
@@ -36,17 +34,6 @@ def empty_checkpoint() -> Checkpoint:
     )
 
 
-def exit_delta_task_id(step: int, task_id: str) -> str:
-    """Synthetic task id for exit-mode DeltaChannel writes.
-
-    Embeds the superstep in the first UUID group so `ORDER BY task_id, idx`
-    preserves chronological order while remaining a valid RFC UUID (required by
-    Postgres `checkpoint_writes.task_id uuid` columns).
-    """
-    parts = str(uuid.UUID(task_id)).split("-")
-    return f"{step:08d}-{parts[1]}-{parts[2]}-{parts[3]}-{parts[4]}"
-
-
 def delta_channels_to_snapshot(
     channels: Mapping[str, BaseChannel],
     counters_since_delta_snapshot: Mapping[str, tuple[int, int]],
@@ -71,138 +58,6 @@ def delta_channels_to_snapshot(
     return result
 
 
-def get_updated_channels_from_tasks(
-    run_tasks: Iterable[Any],
-) -> set[str]:
-    """Channel names written by an update_state superstep (excluding PUSH)."""
-    return {c for task in run_tasks for c, _ in task.writes if c != PUSH}
-
-
-def get_delta_channels_from_all_channels(
-    channels: Mapping[str, BaseChannel],
-    *,
-    include_unavailable: bool = False,
-) -> set[str]:
-    """Every available DeltaChannel.
-
-    The set to snapshot whenever no ancestor walk can reconstruct these
-    channels: the first update_state of a fresh thread (no ancestors at all),
-    and the first checkpoint of a fork (whose base also holds the writes of the
-    branch the fork abandons).
-    """
-    return {
-        k
-        for k, ch in channels.items()
-        if isinstance(ch, DeltaChannel) and (include_unavailable or ch.is_available())
-    }
-
-
-def create_metadata_for_update_state_api(
-    channels: Mapping[str, BaseChannel],
-    updated_channels: set[str],
-    *,
-    prev_metadata: Mapping[str, Any] | None,
-) -> dict[str, tuple[int, int]]:
-    """Advance ``counters_since_delta_snapshot`` for update_state on a non-fresh thread.
-
-    Mirrors the per-superstep counter bump in ``_loop._put_checkpoint``.
-    """
-    prev_counters = dict(
-        (prev_metadata or {}).get("counters_since_delta_snapshot") or {}
-    )
-    new_counters: dict[str, tuple[int, int]] = {}
-    for ch_name, ch in channels.items():
-        if not isinstance(ch, DeltaChannel):
-            continue
-        u, s = prev_counters.get(ch_name, (0, 0))
-        s += 1
-        if ch_name in updated_channels:
-            u += 1
-        new_counters[ch_name] = (u, s)
-    return new_counters
-
-
-def create_checkpoint_plan_for_update_state_api(
-    channels: Mapping[str, BaseChannel],
-    updated_channels: set[str],
-    *,
-    step: int,
-    parents: dict[str, Any],
-    saved_metadata: Mapping[str, Any] | None,
-    is_fresh_thread: bool,
-    is_fork: bool,
-) -> tuple[set[str], dict[str, Any]]:
-    """Return ``(channels_to_snapshot, metadata)`` for an update_state head.
-
-    ``is_fork`` (the update was addressed at an explicit checkpoint) forces a
-    full snapshot for the same reason ``is_fresh_thread`` does: the ancestor
-    walk cannot reconstruct this head. The base a fork branches off keeps the
-    pending writes of the branch being abandoned, and nothing records which
-    child consumed which write, so the walk would replay them here too.
-    Snapshotting terminates the walk at this checkpoint. Every delta channel
-    snapshots, so no counters carry over.
-    """
-    metadata: dict[str, Any] = {
-        "source": "update",
-        "step": step,
-        "parents": parents,
-    }
-    if is_fresh_thread or is_fork:
-        return get_delta_channels_from_all_channels(
-            channels, include_unavailable=is_fork
-        ), metadata
-
-    new_counters = create_metadata_for_update_state_api(
-        channels,
-        updated_channels,
-        prev_metadata=saved_metadata,
-    )
-    channels_to_snapshot = delta_channels_to_snapshot(channels, new_counters)
-    for k in channels_to_snapshot:
-        new_counters[k] = (0, 0)
-    non_zero = {k: v for k, v in new_counters.items() if v != (0, 0)}
-    if non_zero:
-        metadata["counters_since_delta_snapshot"] = non_zero
-    return channels_to_snapshot, metadata
-
-
-def create_fork_checkpoint(
-    checkpoint: Checkpoint,
-    channels: Mapping[str, BaseChannel],
-    step: int,
-    *,
-    is_fork: bool,
-    get_next_version: GetNextVersion,
-) -> Checkpoint:
-    """``create_checkpoint`` for an update_state path that bypasses the plan.
-
-    The ``as_node`` INPUT and END paths write the fork's first checkpoint and
-    return before ``create_checkpoint_plan_for_update_state_api`` runs. Left
-    without a snapshot that checkpoint does not seal the fork, and the next
-    superstep reconstructs its delta channels by walking through the shared
-    base, picking up the abandoned branch's writes and then baking them into
-    whatever it snapshots. Sealing has to happen on the fork's *first*
-    checkpoint, which is this one.
-
-    ``get_next_version`` is required for the same reason exit mode needs it:
-    these paths apply writes to the input channel, not to the delta channel,
-    so nothing bumps the delta channel's version and ``put`` would drop the
-    blob as not-a-new-version. Callers must derive ``new_versions`` from the
-    returned checkpoint rather than the one they passed in.
-    """
-    if not is_fork:
-        return create_checkpoint(checkpoint, channels, step)
-    return create_checkpoint(
-        checkpoint,
-        channels,
-        step,
-        get_next_version=get_next_version,
-        channels_to_snapshot=get_delta_channels_from_all_channels(
-            channels, include_unavailable=True
-        ),
-    )
-
-
 def create_checkpoint(
     checkpoint: Checkpoint,
     channels: Mapping[str, BaseChannel] | None,
@@ -231,28 +86,10 @@ def create_checkpoint(
         values = {}
         channel_versions = dict(checkpoint["channel_versions"])
         for k in channels:
-            ch = channels[k]
             if k not in channel_versions:
-                # Nothing was ever written to this channel on this branch, so
-                # it has no version and `put` would drop any blob stored for
-                # it. A *forced* snapshot still has to land: it is the only
-                # thing that stops the ancestor walk running past this
-                # checkpoint into a fork base that holds another branch's
-                # writes. Mint a first version so the blob survives.
-                if k in channels_to_snapshot and get_next_version is not None:
-                    channel_versions[k] = get_next_version(None, None)
-                    values[k] = _DeltaSnapshot(
-                        ch.get() if ch.is_available() else ch.typ()
-                    )
                 continue
+            ch = channels[k]
             if k in channels_to_snapshot:
-                # Callers force a full snapshot blob here: exit mode when a
-                # delta channel reaches its snapshot cadence, update_state on
-                # a fresh thread (no ancestor to replay writes from), and a
-                # fork (whose base also holds the abandoned branch's writes).
-                # The manual version-bump below only applies to the exit-mode
-                # case.
-                #
                 # In exit mode, the snapshot decision is deferred to exit
                 # time (intermediate steps have do_checkpoint=False). The
                 # channel's count may have reached snapshot_frequency over

libs/langgraph/langgraph/pregel/_loop.py

@@ -70,7 +70,6 @@ from langgraph.callbacks import (
     GraphResumeEvent,
 )
 from langgraph.channels.base import BaseChannel
-from langgraph.channels.binop import _get_overwrite
 from langgraph.channels.delta import DeltaChannel
 from langgraph.channels.untracked_value import UntrackedValue
 from langgraph.constants import TAG_HIDDEN
@@ -103,7 +102,6 @@ from langgraph.pregel._checkpoint import (
     create_checkpoint,
     delta_channels_to_snapshot,
     empty_checkpoint,
-    exit_delta_task_id,
 )
 from langgraph.pregel._executor import (
     AsyncBackgroundExecutor,
@@ -222,33 +220,6 @@ class PregelLoop:
     # under the saver's `ORDER BY task_id, idx` sorting.
     _exit_delta_writes: list[tuple[int, str, str, Any]] | None = None
 
-    # Delta channels that must snapshot at the next checkpoint, whatever their
-    # cadence counters say. Two sources:
-    # * an Overwrite arrived since the last checkpoint, so the snapshot has to
-    #   happen after live update applied overwrite semantics and sparse replay
-    #   starts from the same post-overwrite value;
-    # * this run forked off an explicitly addressed checkpoint, see
-    #   `_delta_channels_awaiting_fork_snapshot`.
-    _delta_channels_forced_snapshot: set[str]
-
-    # Delta channels still owed a fork snapshot, when this run was launched
-    # against an explicitly addressed checkpoint (time travel / fork). That
-    # base keeps the pending writes of the branch the fork abandons, and
-    # nothing records which child consumed which write, so the ancestor walk
-    # would replay them into this branch too. Snapshotting terminates the walk
-    # inside the fork instead of at the shared base. Names drop out once the
-    # blob has landed; a channel with no value yet has nothing to snapshot, so
-    # it waits for the superstep that gives it one.
-    #
-    # The trigger is deliberately coarse: any addressed checkpoint, not only
-    # one that turns out to have abandoned writes on it. Which writes belong to
-    # which child is exactly what is not recorded, so a narrower test would
-    # have to trust the base's `pending_writes` to be complete, and a saver
-    # that leaves them out would silently go back to leaking. Snapshotting when
-    # it was not needed costs one blob per addressed run; not snapshotting when
-    # it was needed is silent corruption.
-    _delta_channels_awaiting_fork_snapshot: set[str]
-
     # The checkpoint_config that points at the parent loaded at `__enter__`
     # (or the synthetic-empty checkpoint, on first run). We capture it
     # eagerly because every `_put_checkpoint` advances `self.checkpoint_config`
@@ -391,16 +362,6 @@ class PregelLoop:
             if self.config[CONF].get(CONFIG_KEY_CHECKPOINT_NS)
             else ()
         )
-        # Checks the value, not just key presence like `is_replaying` above:
-        # subgraph task configs always carry an explicit `None` here, and only
-        # a real id means the caller addressed one specific checkpoint. Read
-        # off `checkpoint_config` so subgraphs resolved through a checkpoint
-        # map during time travel are covered too, matching `__enter__`.
-        self._delta_channels_awaiting_fork_snapshot = (
-            {k for k, spec in specs.items() if isinstance(spec, DeltaChannel)}
-            if self.checkpoint_config[CONF].get(CONFIG_KEY_CHECKPOINT_ID)
-            else set()
-        )
         self.prev_checkpoint_config = None
         runtime = self.config[CONF].get(CONFIG_KEY_RUNTIME)
         self.control = runtime.control if isinstance(runtime, Runtime) else None
@@ -715,11 +676,6 @@ class PregelLoop:
     def after_tick(self) -> None:
         # finish superstep
         writes = [w for t in self.tasks.values() for w in t.writes]
-        self._delta_channels_forced_snapshot.update(
-            ch
-            for ch, v in writes
-            if isinstance(self.specs.get(ch), DeltaChannel) and _get_overwrite(v)[0]
-        )
         # all tasks have finished
         self.updated_channels = apply_writes(
             self.checkpoint,
@@ -1023,11 +979,6 @@ class PregelLoop:
                 manager=None,
                 updated_channels=updated_channels,
             )
-            self._delta_channels_forced_snapshot.update(
-                c
-                for c, v in input_writes
-                if isinstance(self.specs.get(c), DeltaChannel) and _get_overwrite(v)[0]
-            )
             # apply input writes
             updated_channels = apply_writes(
                 self.checkpoint,
@@ -1165,21 +1116,9 @@ class PregelLoop:
         do_checkpoint = self._checkpointer_put_after_previous is not None and (
             exiting or self.durability != "exit"
         )
-        # Fork: make this checkpoint self-contained, so the ancestor walk stops
-        # inside the fork instead of reaching the base this run forked off and
-        # collecting the abandoned branch's writes from it. Resolved here
-        # rather than in `_first` so channels that only got a value this
-        # superstep are covered too.
-        if self._delta_channels_awaiting_fork_snapshot:
-            self._delta_channels_forced_snapshot.update(
-                k
-                for k in self._delta_channels_awaiting_fork_snapshot
-                if k in self.channels
-            )
         # create new checkpoint
         channels_to_snapshot = (
             delta_channels_to_snapshot(self.channels, new_counters)
-            | self._delta_channels_forced_snapshot
             if do_checkpoint
             else set()
         )
@@ -1196,14 +1135,6 @@ class PregelLoop:
         )
         for k in channels_to_snapshot:
             new_counters[k] = (0, 0)
-        if do_checkpoint:
-            self._delta_channels_forced_snapshot.difference_update(channels_to_snapshot)
-            # `create_checkpoint` drops a requested snapshot for a channel with
-            # no version in this checkpoint yet (nothing was ever written to it
-            # on this branch), so keep asking until the blob really landed.
-            self._delta_channels_awaiting_fork_snapshot.difference_update(
-                self.checkpoint["channel_values"]
-            )
         non_zero = {k: v for k, v in new_counters.items() if v != (0, 0)}
         if non_zero:
             self.checkpoint_metadata["counters_since_delta_snapshot"] = non_zero
@@ -1286,10 +1217,7 @@ class PregelLoop:
         counters = dict(
             self.checkpoint_metadata.get("counters_since_delta_snapshot") or {}
         )
-        channels_to_snapshot = (
-            delta_channels_to_snapshot(self.channels, counters)
-            | self._delta_channels_forced_snapshot
-        )
+        channels_to_snapshot = delta_channels_to_snapshot(self.channels, counters)
 
         pending = [
             (step, tid, ch, v)
@@ -1344,7 +1272,7 @@ class PregelLoop:
             },
         )
         for (step, tid), entries in grouped.items():
-            synth_tid = exit_delta_task_id(step, tid)
+            synth_tid = f"{step:08d}-{tid}"
             if self.checkpointer_put_writes_accepts_task_path:
                 fut = self.submit(
                     self.checkpointer_put_writes,
@@ -1733,7 +1661,6 @@ class SyncPregelLoop(PregelLoop, AbstractContextManager):
         )
         self._delta_write_futs = []
         self._error_handler_write_futs = []
-        self._delta_channels_forced_snapshot = set()
         self._exit_delta_writes = (
             [] if self.durability == "exit" and self.checkpointer is not None else None
         )
@@ -1991,7 +1918,6 @@ class AsyncPregelLoop(PregelLoop, AbstractAsyncContextManager):
         )
         self._delta_write_futs = []
         self._error_handler_write_futs = []
-        self._delta_channels_forced_snapshot = set()
         self._exit_delta_writes = (
             [] if self.durability == "exit" and self.checkpointer is not None else None
         )

libs/langgraph/langgraph/pregel/main.py

@@ -133,10 +133,7 @@ from langgraph.pregel._checkpoint import (
     channels_from_checkpoint,
     copy_checkpoint,
     create_checkpoint,
-    create_checkpoint_plan_for_update_state_api,
-    create_fork_checkpoint,
     empty_checkpoint,
-    get_updated_channels_from_tasks,
 )
 from langgraph.pregel._draw import draw_graph
 from langgraph.pregel._io import map_input, read_channels
@@ -1639,24 +1636,8 @@ class Pregel(
             else:
                 raise ValueError(f"Subgraph {recast} not found")
 
-        # Delta channels still owed a fork snapshot. Mirrors
-        # `_delta_channels_awaiting_fork_snapshot` in `_loop.py`: a fork is only
-        # sealed once a checkpoint actually carries the blob. Several superstep
-        # paths (`as_node` of INPUT, END or `__copy__`) write a checkpoint and
-        # return before reaching the plan, so a flag cleared after the first
-        # superstep would leave the branch unsealed and the next superstep would
-        # reconstruct through the shared base.
-        fork_pending: set[str] = (
-            {k for k, v in self.channels.items() if isinstance(v, DeltaChannel)}
-            if config[CONF].get(CONFIG_KEY_CHECKPOINT_ID)
-            else set()
-        )
-
         def perform_superstep(
-            input_config: RunnableConfig,
-            updates: Sequence[StateUpdate],
-            *,
-            is_fork: bool,
+            input_config: RunnableConfig, updates: Sequence[StateUpdate]
         ) -> RunnableConfig:
             # get last checkpoint
             config = ensure_config(self.config, input_config)
@@ -1744,17 +1725,9 @@ class Pregel(
                         self.trigger_to_nodes,
                     )
                 # save checkpoint
-                next_checkpoint = create_fork_checkpoint(
-                    checkpoint,
-                    channels,
-                    step,
-                    is_fork=is_fork,
-                    get_next_version=checkpointer.get_next_version,
-                )
-                fork_pending.difference_update(next_checkpoint["channel_values"])
                 next_config = checkpointer.put(
                     checkpoint_config,
-                    next_checkpoint,
+                    create_checkpoint(checkpoint, channels, step),
                     {
                         "source": "update",
                         "step": step + 1,
@@ -1762,7 +1735,7 @@ class Pregel(
                     },
                     get_new_channel_versions(
                         checkpoint_previous_versions,
-                        next_checkpoint["channel_versions"],
+                        checkpoint["channel_versions"],
                     ),
                 )
                 return patch_checkpoint_map(
@@ -1791,17 +1764,9 @@ class Pregel(
                         if saved and saved.metadata.get("step") is not None
                         else -1
                     )
-                    next_checkpoint = create_fork_checkpoint(
-                        checkpoint,
-                        channels,
-                        next_step,
-                        is_fork=is_fork,
-                        get_next_version=checkpointer.get_next_version,
-                    )
-                    fork_pending.difference_update(next_checkpoint["channel_values"])
                     next_config = checkpointer.put(
                         checkpoint_config,
-                        next_checkpoint,
+                        create_checkpoint(checkpoint, channels, next_step),
                         {
                             "source": "input",
                             "step": next_step,
@@ -1811,7 +1776,7 @@ class Pregel(
                         },
                         get_new_channel_versions(
                             checkpoint_previous_versions,
-                            next_checkpoint["channel_versions"],
+                            checkpoint["channel_versions"],
                         ),
                     )
 
@@ -1907,9 +1872,6 @@ class Pregel(
                     return perform_superstep(
                         patch_checkpoint_map(next_config, saved.metadata),
                         [item for lst in user_group_by.values() for item in lst],
-                        # The checkpoint just written clears tasks and carries
-                        # no delta snapshot, so a fork is still unsealed here.
-                        is_fork=is_fork,
                     )
 
                 return patch_checkpoint_map(next_config, saved.metadata)
@@ -2034,14 +1996,35 @@ class Pregel(
                         },
                     ),
                 )
-            updated_channels = get_updated_channels_from_tasks(run_tasks)
-            if saved is not None:
-                for task_id, task in zip(run_task_ids, run_tasks):
-                    channel_writes = [w for w in task.writes if w[0] != PUSH]
-                    if channel_writes:
-                        checkpointer.put_writes(
-                            checkpoint_config, channel_writes, task_id
-                        )
+            # save task writes
+            has_delta_writes = any(
+                isinstance(channels.get(c), DeltaChannel)
+                for task in run_tasks
+                for c, _ in task.writes
+            )
+            should_put_writes = saved is not None or has_delta_writes
+
+            if saved is None and has_delta_writes:
+                # If there is no previous checkpoint, we need to create a stub checkpoint
+                # so the first delta writes has a parent to anchor under.
+                # This is the model of DeltaChannel.
+                stub = empty_checkpoint()
+                checkpoint_config = checkpointer.put(
+                    patch_configurable(
+                        checkpoint_config, {CONFIG_KEY_CHECKPOINT_ID: None}
+                    ),
+                    stub,
+                    {"source": "update", "step": -1, "parents": {}},
+                    {},
+                )
+
+            for task_id, task in zip(run_task_ids, run_tasks):
+                # channel writes are saved to current checkpoint
+                channel_writes = [w for w in task.writes if w[0] != PUSH]
+                if should_put_writes and channel_writes:
+                    checkpointer.put_writes(checkpoint_config, channel_writes, task_id)
+
+            # apply to checkpoint and save
             apply_writes(
                 checkpoint,
                 channels,
@@ -2049,38 +2032,21 @@ class Pregel(
                 checkpointer.get_next_version,
                 self.trigger_to_nodes,
             )
-            channels_to_snapshot, checkpoint_metadata = (
-                create_checkpoint_plan_for_update_state_api(
-                    channels,
-                    updated_channels,
-                    step=step + 1,
-                    parents=saved.metadata.get("parents", {}) if saved else {},
-                    saved_metadata=saved.metadata if saved else None,
-                    is_fresh_thread=saved is None,
-                    is_fork=is_fork,
-                )
-            )
-            checkpoint = create_checkpoint(
-                checkpoint,
-                channels,
-                step + 1,
-                updated_channels=updated_channels if channels_to_snapshot else None,
-                get_next_version=checkpointer.get_next_version
-                if channels_to_snapshot
-                else None,
-                channels_to_snapshot=channels_to_snapshot,
-            )
-            if is_fork:
-                fork_pending.difference_update(checkpoint["channel_values"])
+            checkpoint = create_checkpoint(checkpoint, channels, step + 1)
             next_config = checkpointer.put(
                 checkpoint_config,
                 checkpoint,
-                checkpoint_metadata,
+                {
+                    "source": "update",
+                    "step": step + 1,
+                    "parents": saved.metadata.get("parents", {}) if saved else {},
+                },
                 get_new_channel_versions(
                     checkpoint_previous_versions, checkpoint["channel_versions"]
                 ),
             )
             for task_id, task in zip(run_task_ids, run_tasks):
+                # save push writes
                 if push_writes := [w for w in task.writes if w[0] == PUSH]:
                     checkpointer.put_writes(next_config, push_writes, task_id)
 
@@ -2089,14 +2055,8 @@ class Pregel(
         current_config = patch_configurable(
             config, {CONFIG_KEY_THREAD_ID: str(config[CONF][CONFIG_KEY_THREAD_ID])}
         )
-        # The flag cannot be derived from `current_config`: `perform_superstep`
-        # returns the config of the checkpoint it just wrote and the loop feeds
-        # that back in, so from the second superstep on it always names a
-        # checkpoint whether or not the caller addressed one.
         for superstep in supersteps:
-            current_config = perform_superstep(
-                current_config, superstep, is_fork=bool(fork_pending)
-            )
+            current_config = perform_superstep(current_config, superstep)
         return current_config
 
     async def abulk_update_state(
@@ -2149,24 +2109,8 @@ class Pregel(
             else:
                 raise ValueError(f"Subgraph {recast} not found")
 
-        # Delta channels still owed a fork snapshot. Mirrors
-        # `_delta_channels_awaiting_fork_snapshot` in `_loop.py`: a fork is only
-        # sealed once a checkpoint actually carries the blob. Several superstep
-        # paths (`as_node` of INPUT, END or `__copy__`) write a checkpoint and
-        # return before reaching the plan, so a flag cleared after the first
-        # superstep would leave the branch unsealed and the next superstep would
-        # reconstruct through the shared base.
-        fork_pending: set[str] = (
-            {k for k, v in self.channels.items() if isinstance(v, DeltaChannel)}
-            if config[CONF].get(CONFIG_KEY_CHECKPOINT_ID)
-            else set()
-        )
-
         async def aperform_superstep(
-            input_config: RunnableConfig,
-            updates: Sequence[StateUpdate],
-            *,
-            is_fork: bool,
+            input_config: RunnableConfig, updates: Sequence[StateUpdate]
         ) -> RunnableConfig:
             # get last checkpoint
             config = ensure_config(self.config, input_config)
@@ -2252,25 +2196,16 @@ class Pregel(
                         self.trigger_to_nodes,
                     )
                 # save checkpoint
-                next_checkpoint = create_fork_checkpoint(
-                    checkpoint,
-                    channels,
-                    step,
-                    is_fork=is_fork,
-                    get_next_version=checkpointer.get_next_version,
-                )
-                fork_pending.difference_update(next_checkpoint["channel_values"])
                 next_config = await checkpointer.aput(
                     checkpoint_config,
-                    next_checkpoint,
+                    create_checkpoint(checkpoint, channels, step),
                     {
                         "source": "update",
                         "step": step + 1,
                         "parents": saved.metadata.get("parents", {}) if saved else {},
                     },
                     get_new_channel_versions(
-                        checkpoint_previous_versions,
-                        next_checkpoint["channel_versions"],
+                        checkpoint_previous_versions, checkpoint["channel_versions"]
                     ),
                 )
                 return patch_checkpoint_map(
@@ -2299,17 +2234,9 @@ class Pregel(
                         if saved and saved.metadata.get("step") is not None
                         else -1
                     )
-                    next_checkpoint = create_fork_checkpoint(
-                        checkpoint,
-                        channels,
-                        next_step,
-                        is_fork=is_fork,
-                        get_next_version=checkpointer.get_next_version,
-                    )
-                    fork_pending.difference_update(next_checkpoint["channel_values"])
                     next_config = await checkpointer.aput(
                         checkpoint_config,
-                        next_checkpoint,
+                        create_checkpoint(checkpoint, channels, next_step),
                         {
                             "source": "input",
                             "step": next_step,
@@ -2319,7 +2246,7 @@ class Pregel(
                         },
                         get_new_channel_versions(
                             checkpoint_previous_versions,
-                            next_checkpoint["channel_versions"],
+                            checkpoint["channel_versions"],
                         ),
                     )
 
@@ -2414,9 +2341,6 @@ class Pregel(
                     return await aperform_superstep(
                         patch_checkpoint_map(next_config, saved.metadata),
                         [item for lst in user_group_by.values() for item in lst],
-                        # The checkpoint just written clears tasks and carries
-                        # no delta snapshot, so a fork is still unsealed here.
-                        is_fork=is_fork,
                     )
 
                 return patch_checkpoint_map(
@@ -2539,14 +2463,36 @@ class Pregel(
                         },
                     ),
                 )
-            updated_channels = get_updated_channels_from_tasks(run_tasks)
-            if saved is not None:
-                for task_id, task in zip(run_task_ids, run_tasks):
-                    channel_writes = [w for w in task.writes if w[0] != PUSH]
-                    if channel_writes:
-                        await checkpointer.aput_writes(
-                            checkpoint_config, channel_writes, task_id
-                        )
+            # save task writes
+            has_delta_writes = any(
+                isinstance(channels.get(c), DeltaChannel)
+                for task in run_tasks
+                for c, _ in task.writes
+            )
+            should_put_writes = saved is not None or has_delta_writes
+
+            if saved is None and has_delta_writes:
+                # If there is no previous checkpoint, we need to create a stub checkpoint
+                # so the first delta writes has a parent to anchor under.
+                # This is the model of DeltaChannel.
+                stub = empty_checkpoint()
+                checkpoint_config = await checkpointer.aput(
+                    patch_configurable(
+                        checkpoint_config, {CONFIG_KEY_CHECKPOINT_ID: None}
+                    ),
+                    stub,
+                    {"source": "update", "step": -1, "parents": {}},
+                    {},
+                )
+
+            for task_id, task in zip(run_task_ids, run_tasks):
+                # channel writes are saved to current checkpoint
+                channel_writes = [w for w in task.writes if w[0] != PUSH]
+                if should_put_writes and channel_writes:
+                    await checkpointer.aput_writes(
+                        checkpoint_config, channel_writes, task_id
+                    )
+            # apply to checkpoint and save
             apply_writes(
                 checkpoint,
                 channels,
@@ -2554,38 +2500,22 @@ class Pregel(
                 checkpointer.get_next_version,
                 self.trigger_to_nodes,
             )
-            channels_to_snapshot, checkpoint_metadata = (
-                create_checkpoint_plan_for_update_state_api(
-                    channels,
-                    updated_channels,
-                    step=step + 1,
-                    parents=saved.metadata.get("parents", {}) if saved else {},
-                    saved_metadata=saved.metadata if saved else None,
-                    is_fresh_thread=saved is None,
-                    is_fork=is_fork,
-                )
-            )
-            checkpoint = create_checkpoint(
-                checkpoint,
-                channels,
-                step + 1,
-                updated_channels=updated_channels if channels_to_snapshot else None,
-                get_next_version=checkpointer.get_next_version
-                if channels_to_snapshot
-                else None,
-                channels_to_snapshot=channels_to_snapshot,
-            )
-            if is_fork:
-                fork_pending.difference_update(checkpoint["channel_values"])
+            checkpoint = create_checkpoint(checkpoint, channels, step + 1)
+            # save checkpoint, after applying writes
             next_config = await checkpointer.aput(
                 checkpoint_config,
                 checkpoint,
-                checkpoint_metadata,
+                {
+                    "source": "update",
+                    "step": step + 1,
+                    "parents": saved.metadata.get("parents", {}) if saved else {},
+                },
                 get_new_channel_versions(
                     checkpoint_previous_versions, checkpoint["channel_versions"]
                 ),
             )
             for task_id, task in zip(run_task_ids, run_tasks):
+                # save push writes
                 if push_writes := [w for w in task.writes if w[0] == PUSH]:
                     await checkpointer.aput_writes(next_config, push_writes, task_id)
             return patch_checkpoint_map(next_config, saved.metadata if saved else None)
@@ -2593,14 +2523,8 @@ class Pregel(
         current_config = patch_configurable(
             config, {CONFIG_KEY_THREAD_ID: str(config[CONF][CONFIG_KEY_THREAD_ID])}
         )
-        # The flag cannot be derived from `current_config`: `aperform_superstep`
-        # returns the config of the checkpoint it just wrote and the loop feeds
-        # that back in, so from the second superstep on it always names a
-        # checkpoint whether or not the caller addressed one.
         for superstep in supersteps:
-            current_config = await aperform_superstep(
-                current_config, superstep, is_fork=bool(fork_pending)
-            )
+            current_config = await aperform_superstep(current_config, superstep)
         return current_config
 
     def update_state(
@@ -3603,7 +3527,7 @@ class Pregel(
         control: RunControl | None = None,
         transformers: Sequence[Callable[[tuple[str, ...]], Any]] | None = None,
         **kwargs: Any,
-    ) -> GraphRunStream:
+    ) -> Any:
         """Internal v3 sync streaming implementation. Public entry: stream_events(version='v3').
 
         Extra keyword arguments are forwarded to the underlying ``stream(...)``
@@ -3659,7 +3583,7 @@ class Pregel(
         control: RunControl | None = None,
         transformers: Sequence[Callable[[tuple[str, ...]], Any]] | None = None,
         **kwargs: Any,
-    ) -> AsyncGraphRunStream:
+    ) -> Any:
         """Internal v3 async streaming implementation. Public entry: astream_events(version='v3').
 
         Extra keyword arguments are forwarded to the underlying ``astream(...)``
@@ -3724,7 +3648,7 @@ class Pregel(
         control: RunControl | None = None,
         transformers: Sequence[Callable[[tuple[str, ...]], Any]] | None = None,
         **kwargs: Any,
-    ) -> GraphRunStream: ...
+    ) -> Any: ...
 
     def stream_events(
         self,
@@ -3829,7 +3753,7 @@ class Pregel(
         control: RunControl | None = None,
         transformers: Sequence[Callable[[tuple[str, ...]], Any]] | None = None,
         **kwargs: Any,
-    ) -> Awaitable[AsyncGraphRunStream]: ...
+    ) -> Awaitable[Any]: ...
 
     def astream_events(
         self,

libs/langgraph/langgraph/stream/run_stream.py

@@ -12,13 +12,7 @@ from langgraph.stream._mux import StreamMux
 from langgraph.stream._types import ProtocolEvent
 
 if TYPE_CHECKING:
-    from langchain_core.language_models.chat_model_stream import (
-        AsyncChatModelStream,
-        ChatModelStream,
-    )
-
-    from langgraph.stream.stream_channel import StreamChannel
-    from langgraph.stream.transformers import LifecyclePayload, SubgraphStatus
+    from langgraph.stream.transformers import SubgraphStatus
 
 
 def _drive_until_done(pump: Callable[[], bool]) -> None:
@@ -54,16 +48,6 @@ class GraphRunStream:
         experimental and may change.
     """
 
-    # Native projections always registered by `stream_events(version="v3")`.
-    # Attached dynamically by the `setattr` loop in `__init__`; declared here
-    # so type checkers see them. Opt-in native projections (`updates`,
-    # `custom`, `checkpoints`, `debug`, `tasks`) are only present when their
-    # transformer is registered, so they are reached via `extensions[...]`.
-    values: StreamChannel[dict[str, Any]]
-    messages: StreamChannel[ChatModelStream]
-    lifecycle: StreamChannel[LifecyclePayload]
-    subgraphs: StreamChannel[SubgraphRunStream]
-
     def __init__(
         self,
         graph_iter: Iterator[Any] | None,
@@ -148,23 +132,13 @@ class GraphRunStream:
     def abort(self) -> None:
         """Stop the run early.
 
-        Closes the underlying graph iterator (propagating `GeneratorExit`
-        so in-flight nodes and subgraphs are cancelled), closes the mux,
-        and marks the stream exhausted. Idempotent.
+        Closes the mux and marks the stream exhausted. The graph
+        iterator is dropped; any in-flight nodes see the closure on
+        their next yield point. Idempotent.
         """
         if self._exhausted:
             return
         self._exhausted = True
-        graph_iter = self._graph_iter
-        self._graph_iter = None
-        if (
-            graph_iter is not None
-            and (close := getattr(graph_iter, "close", None)) is not None
-        ):
-            try:
-                close()
-            except Exception:
-                pass
         try:
             self._mux.close()
         except Exception:
@@ -345,16 +319,6 @@ class AsyncGraphRunStream:
         experimental and may change.
     """
 
-    # Native projections always registered by `astream_events(version="v3")`.
-    # Attached dynamically by the `setattr` loop in `__init__`; declared here
-    # so type checkers see them. Opt-in native projections (`updates`,
-    # `custom`, `checkpoints`, `debug`, `tasks`) are only present when their
-    # transformer is registered, so they are reached via `extensions[...]`.
-    values: StreamChannel[dict[str, Any]]
-    messages: StreamChannel[AsyncChatModelStream]
-    lifecycle: StreamChannel[LifecyclePayload]
-    subgraphs: StreamChannel[AsyncSubgraphRunStream]
-
     def __init__(
         self,
         graph_aiter: AsyncIterator[Any] | None,
@@ -384,8 +348,6 @@ class AsyncGraphRunStream:
         self._scope_list: list[str] = list(mux.scope)
         self._pump_cond = asyncio.Condition()
         self._pumping = False
-        self._anext_task: asyncio.Future[Any] | None = None
-        self._aborting = False
         for key in mux.native_keys:
             setattr(self, key, mux.extensions[key])
         if wire_pump:
@@ -445,25 +407,7 @@ class AsyncGraphRunStream:
 
         try:
             try:
-                # Run the pull as a child task so `abort()` can cancel it
-                # mid-flight. Cancelling propagates `CancelledError` into the
-                # graph generator frame -> Pregel loop -> nested subgraph
-                # nodes, which a bare `aclose()` cannot do while the generator
-                # is running ("asynchronous generator is already running").
-                self._anext_task = asyncio.ensure_future(self._graph_aiter.__anext__())
-                try:
-                    part = await self._anext_task
-                except asyncio.CancelledError:
-                    if self._aborting:
-                        # Abort-initiated cancel: stop gracefully.
-                        self._exhausted = True
-                        return False
-                    # Genuine external cancel of this task: also stop the
-                    # in-flight pull, then propagate.
-                    self._anext_task.cancel()
-                    raise
-                finally:
-                    self._anext_task = None
+                part = await self._graph_aiter.__anext__()
                 event = convert_to_protocol_event(part)
                 self._observe_event(event)
                 await self._mux.apush(event)
@@ -484,40 +428,15 @@ class AsyncGraphRunStream:
     async def abort(self) -> None:
         """Stop the run early.
 
-        Marks the stream exhausted and wakes any pump-waiters. Cancels an
-        in-flight pull if one is running, then closes the underlying graph
-        iterator, so running nodes and nested subgraphs are cancelled
-        whether or not a pump is mid-pull. Closes the mux; any `apush`
-        blocked on backpressure wakes and returns without appending.
-        Idempotent.
+        Marks the stream exhausted, wakes any pump-waiters, and closes
+        the mux. Any `apush` blocked on backpressure wakes and returns
+        without appending. Idempotent.
         """
         async with self._pump_cond:
             if self._exhausted:
                 return
             self._exhausted = True
-            self._aborting = True
-            graph_aiter = self._graph_aiter
-            self._graph_aiter = None
-            anext_task = self._anext_task
             self._pump_cond.notify_all()
-        # If a pump is mid-pull, cancel it so the cancellation propagates
-        # into running nodes and nested subgraphs. Once it settles the
-        # generator is no longer running, so the `aclose()` below is a safe
-        # final cleanup (and handles the no-in-flight-pull case directly).
-        if anext_task is not None and not anext_task.done():
-            anext_task.cancel()
-            try:
-                await anext_task
-            except (asyncio.CancelledError, Exception):
-                pass
-        if (
-            graph_aiter is not None
-            and (aclose := getattr(graph_aiter, "aclose", None)) is not None
-        ):
-            try:
-                await aclose()
-            except Exception:
-                pass
         try:
             await self._mux.aclose()
         except Exception:

libs/langgraph/langgraph/types.py

@@ -976,9 +976,3 @@ class Overwrite:
 
     value: Any
     """The value to write directly to the channel, bypassing any reducer."""
-
-    type: Literal["__overwrite__"] = "__overwrite__"
-    """Discriminator field. Lets the channel reducer recognise an `Overwrite`
-    even after its dataclass form is JSON-serialised and the typed instance
-    is lost (e.g. an `orjson`-encoded state update routed through the
-    LangGraph API server)."""

libs/langgraph/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph"
-version = "1.2.10"
+version = "1.2.4"
 description = "Building stateful, multi-actor applications with LLMs"
 authors = []
 requires-python = ">=3.10"
@@ -24,7 +24,7 @@ classifiers = [
     'Programming Language :: Python :: 3.13',
 ]
 dependencies = [
-    "langchain-core>=1.4.7,<2",
+    "langchain-core>=1.4.0,<2",
     "langgraph-checkpoint>=4.1.0,<5.0.0",
     "langgraph-sdk>=0.4.2,<0.5.0",
     "langgraph-prebuilt>=1.1.0,<1.2.0",
@@ -89,12 +89,8 @@ langgraph-sdk = { path = "../sdk-py", editable = true }
 langgraph-cli = { path = "../cli", editable = true }
 
 [tool.ruff]
-lint.select = [ "E", "F", "I", "PLC0415", "RUF100", "TID251", "UP" ]
+lint.select = [ "E", "F", "I", "TID251", "UP" ]
 lint.ignore = [ "E501" ]
-# PLC0415 (import-outside-top-level) is enforced in tests only. Library code
-# still has deferred imports that have not been reviewed, so it stays exempt
-# for now.
-lint.per-file-ignores = { "langgraph/**" = ["PLC0415"] }
 line-length = 88
 indent-width = 4
 extend-include = ["*.ipynb"]

libs/langgraph/tests/memory_assert.py

@@ -1,6 +1,5 @@
 import os
 import tempfile
-import time
 from collections import defaultdict
 from functools import partial
 from typing import Any
@@ -74,6 +73,8 @@ class MemorySaverAssertImmutable(InMemorySaver):
         new_versions: ChannelVersions,
     ) -> None:
         if self.put_sleep:
+            import time
+
             time.sleep(self.put_sleep)
         # assert checkpoint hasn't been modified since last written
         thread_id = config["configurable"]["thread_id"]
@@ -85,19 +86,11 @@ class MemorySaverAssertImmutable(InMemorySaver):
                 )
                 == saved
             ), config["configurable"]["checkpoint_ns"]
-        # call super to write checkpoint
-        next_config = super().put(config, checkpoint, metadata, new_versions)
-        # Record the checkpoint as the saver reads it back, not the object it
-        # was handed. `channel_values` are stored per (channel, version), so a
-        # channel a step did not write is refilled from the blob its inherited
-        # version still points at. A `DeltaChannel` omits its value except at a
-        # snapshot, which makes the two representations differ for reasons that
-        # are not mutation. Comparing read-back against read-back still catches
-        # a checkpoint whose stored data actually changed.
         self.storage_for_copies[thread_id][checkpoint_ns][checkpoint["id"]] = (
-            self.serde.dumps_typed(super().get(next_config))
+            self.serde.dumps_typed(checkpoint)
         )
-        return next_config
+        # call super to write checkpoint
+        return super().put(config, checkpoint, metadata, new_versions)
 
 
 class MemorySaverNoPending(InMemorySaver):

libs/langgraph/tests/test_channels.py

@@ -2,16 +2,14 @@ import operator
 from collections.abc import Sequence
 from typing import Annotated
 
-import orjson
 import pytest
 from langchain_core.messages import AIMessage, HumanMessage, RemoveMessage
 from langgraph.checkpoint.memory import InMemorySaver
 from langgraph.checkpoint.serde.types import _DeltaSnapshot
 from typing_extensions import NotRequired, TypedDict
 
-from langgraph._internal._constants import OVERWRITE
 from langgraph._internal._typing import MISSING
-from langgraph.channels.binop import BinaryOperatorAggregate, _get_overwrite
+from langgraph.channels.binop import BinaryOperatorAggregate
 from langgraph.channels.delta import DeltaChannel
 from langgraph.channels.last_value import LastValue
 from langgraph.channels.topic import Topic
@@ -188,43 +186,6 @@ def test_delta_channel_overwrite() -> None:
     assert ch.get()[0].content == "new"
 
 
-def test_overwrite_dataclass_form_survives_json_roundtrip() -> None:
-    """`Overwrite` serialised with `orjson` collapses to a plain dict but
-    must still be recognised as an overwrite by the channel reducer.
-
-    Without the `type` discriminator the dataclass-erased shape (`{"value":
-    ...}`) is indistinguishable from a literal channel value, and downstream
-    reducers raise `MESSAGE_COERCION_FAILURE` (or similar) on read.
-    """
-
-    ow = Overwrite(value=[HumanMessage(content="new", id="h2")])
-    erased = orjson.loads(orjson.dumps(ow, default=lambda o: o.model_dump()))
-
-    assert erased["type"] == OVERWRITE
-    is_overwrite, value = _get_overwrite(erased)
-    assert is_overwrite
-    assert isinstance(value, list)
-    assert value[0]["content"] == "new"
-
-
-def test_overwrite_sentinel_dict_still_recognised() -> None:
-    """The pre-existing `{"__overwrite__": value}` dict form continues to be
-    recognised. This is the canonical sentinel emitted by producers that do
-    not have an `Overwrite` dataclass available."""
-
-    is_overwrite, value = _get_overwrite({OVERWRITE: ["b"]})
-    assert is_overwrite
-    assert value == ["b"]
-
-
-def test_overwrite_non_matching_dict_not_recognised() -> None:
-    """Dicts that resemble the erased shape but do not carry the
-    `__overwrite__` discriminator must not be misclassified as overwrites."""
-
-    assert _get_overwrite({"value": ["b"]}) == (False, None)
-    assert _get_overwrite({"type": "human", "value": "hi"}) == (False, None)
-
-
 def test_delta_channel_remove_message_and_replay() -> None:
     """RemoveMessage must round-trip correctly when writes are replayed."""
     spec = DeltaChannel(_messages_delta_reducer, list)
@@ -436,93 +397,6 @@ def test_delta_channel_inmemory_saver_assembles_writes() -> None:
     assert len(state.values["messages"]) == 4  # 2 human + 2 AI
 
 
-def test_delta_channel_overwrite_superstep_snapshots() -> None:
-    def reducer(state: list[str], writes: Sequence[list[str]]) -> list[str]:
-        result = list(state)
-        for write in writes:
-            result.extend(write)
-        return result
-
-    class State(TypedDict):
-        items: Annotated[
-            list[str], DeltaChannel(reducer, list, snapshot_frequency=1000)
-        ]
-
-    def node_a(state: State) -> dict:
-        return {"items": ["a"]}
-
-    def node_b(state: State) -> dict:
-        return {"items": Overwrite(["b"])}
-
-    def node_c(state: State) -> dict:
-        return {"items": ["c"]}
-
-    builder = StateGraph(State)
-    builder.add_node("node_a", node_a)
-    builder.add_node("node_b", node_b)
-    builder.add_node("node_c", node_c)
-    builder.add_edge(START, "node_a")
-    builder.add_edge("node_a", "node_b")
-    builder.add_edge("node_a", "node_c")
-
-    saver = InMemorySaver()
-    graph = builder.compile(checkpointer=saver)
-    config = {"configurable": {"thread_id": "overwrite-snapshot"}}
-
-    result = graph.invoke({"items": ["START"]}, config)
-    assert result == {"items": ["b"]}
-
-    saved = saver.get_tuple(config)
-    assert saved is not None
-    snapshot = saved.checkpoint["channel_values"].get("items")
-    assert isinstance(snapshot, _DeltaSnapshot)
-    assert snapshot.value == ["b"]
-    assert saved.metadata.get("counters_since_delta_snapshot", {}).get("items") is None
-
-
-def test_delta_channel_replay_after_overwrite_snapshot() -> None:
-    def reducer(state: list[str], writes: Sequence[list[str]]) -> list[str]:
-        result = list(state)
-        for write in writes:
-            result.extend(write)
-        return result
-
-    class State(TypedDict):
-        items: Annotated[
-            list[str], DeltaChannel(reducer, list, snapshot_frequency=1000)
-        ]
-
-    calls = 0
-
-    def node(state: State) -> dict:
-        nonlocal calls
-        calls += 1
-        if calls == 1:
-            return {"items": Overwrite(["reset"])}
-        return {"items": ["after"]}
-
-    builder = StateGraph(State)
-    builder.add_node("node", node)
-    builder.add_edge(START, "node")
-
-    saver = InMemorySaver()
-    graph = builder.compile(checkpointer=saver)
-    config = {"configurable": {"thread_id": "overwrite-replay"}}
-
-    assert graph.invoke({"items": ["before"]}, config) == {"items": ["reset"]}
-    first_saved = saver.get_tuple(config)
-    assert first_saved is not None
-    assert isinstance(
-        first_saved.checkpoint["channel_values"].get("items"), _DeltaSnapshot
-    )
-
-    assert graph.invoke({"items": []}, config) == {"items": ["reset", "after"]}
-    second_saved = saver.get_tuple(config)
-    assert second_saved is not None
-    assert "items" not in second_saved.checkpoint["channel_values"]
-    assert graph.get_state(config).values == {"items": ["reset", "after"]}
-
-
 # ---------------------------------------------------------------------------
 # DeltaChannel — dict reducer
 # ---------------------------------------------------------------------------

libs/langgraph/tests/test_config_async.py

@@ -24,7 +24,7 @@ class _TrackingCallback(BaseCallbackHandler):
     def __init__(self) -> None:
         self.called = False
 
-    def on_chain_start(self, *args, **kwargs) -> None:
+    def on_chain_start(self, *args, **kwargs) -> None:  # noqa: ANN002, ANN003
         self.called = True
 
 
@@ -55,7 +55,7 @@ async def test_with_config_configurable_preserved_on_invoke() -> None:
     builder = StateGraph(dict)
     captured: dict = {}
 
-    def node(state, config):
+    def node(state, config):  # noqa: ANN001
         captured.update(config.get("configurable") or {})
         return state
 
@@ -79,7 +79,7 @@ async def test_with_config_metadata_preserved_on_invoke() -> None:
     builder = StateGraph(dict)
     captured: dict = {}
 
-    def node(state, config):
+    def node(state, config):  # noqa: ANN001
         captured.update(config.get("metadata") or {})
         return state
 
@@ -104,7 +104,7 @@ async def test_with_config_tags_preserved_on_invoke() -> None:
     builder = StateGraph(dict)
     captured: list = []
 
-    def node(state, config):
+    def node(state, config):  # noqa: ANN001
         captured.extend(config.get("tags") or [])
         return state
 

libs/langgraph/tests/test_delta_channel_benchmark.py

@@ -220,7 +220,7 @@ def _checkpointers() -> list[tuple[str, Any]]:
     result: list[tuple[str, Any]] = [("InMemory", None)]
     if _POSTGRES_AVAILABLE:
         try:
-            import psycopg  # noqa: PLC0415
+            import psycopg
 
             psycopg.connect(_POSTGRES_URI).close()
             result.append(("Postgres", "postgres"))

libs/langgraph/tests/test_delta_channel_exit_mode.py

@@ -6,7 +6,6 @@ channel), lazy stub creation when no parent exists, and proper read-path
 reconstruction via ancestor walks.
 """
 
-import uuid
 from typing import Annotated, Any
 
 import pytest
@@ -18,28 +17,10 @@ from typing_extensions import TypedDict
 from langgraph.channels.delta import DeltaChannel
 from langgraph.graph import START, StateGraph
 from langgraph.graph.message import _messages_delta_reducer
-from langgraph.pregel._checkpoint import exit_delta_task_id
 
 pytestmark = pytest.mark.anyio
 
 
-def test_exit_delta_task_id_is_valid_uuid_and_ordered() -> None:
-    """Exit-mode synthetic task ids must parse as UUID and sort by superstep."""
-    tid = "4f7226e4-0270-bf16-1ef8-fb321bef9f3d"
-    id1 = exit_delta_task_id(1, tid)
-    id7 = exit_delta_task_id(7, tid)
-
-    uuid.UUID(id1)
-    uuid.UUID(id7)
-    assert id1 < id7
-    assert id1.split("-")[0] == "00000001"
-    assert id7.split("-")[0] == "00000007"
-    assert id1.endswith("-0270-bf16-1ef8-fb321bef9f3d")
-
-    with pytest.raises(ValueError):
-        uuid.UUID(f"00000001-{tid}")
-
-
 def _build_graph(
     checkpointer: InMemorySaver,
     *,

libs/langgraph/tests/test_delta_channel_fork.py

@@ -1,414 +0,0 @@
-"""Forking a thread must not replay the abandoned branch into the fork.
-
-Regression suite for #8443. Addressing an older checkpoint creates a fork: the
-shared base ends up with two children, and it keeps the ``checkpoint_writes``
-of the branch the fork abandons. Nothing in the stored data records which child
-consumed which write, so the ``DeltaChannel`` ancestor walk used to collect the
-abandoned branch's writes as well.
-
-Every graph here carries a ``DeltaChannel`` and a plain reducer channel fed the
-same values. ``full`` channels store complete ``channel_values`` and need no
-replay, so the plain channel is the oracle: after a fork the two must agree.
-
-Coverage: fork by ``invoke`` with new input (sync/async, all durabilities),
-fork off the checkpoint that predates the thread's first input (sync/async),
-fork by ``update_state`` / ``aupdate_state``, fork before the delta channel
-ever had a value, and guards that neither an
-unaddressed run nor an unaddressed multi-superstep ``bulk_update_state``
-departs from the normal ``snapshot_frequency`` cadence.
-"""
-
-from collections.abc import Sequence
-from operator import add
-from typing import Annotated, Any
-
-import pytest
-from langchain_core.runnables import RunnableConfig
-from langgraph.checkpoint.base import BaseCheckpointSaver
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
-from typing_extensions import TypedDict
-
-from langgraph._internal._constants import INPUT
-from langgraph.channels.delta import DeltaChannel
-from langgraph.graph import END, StateGraph
-from langgraph.types import Durability, StateSnapshot, StateUpdate
-
-pytestmark = pytest.mark.anyio
-
-
-def _append(current: list | None, writes: Sequence[Any]) -> list:
-    """DeltaChannel reducer: extend the list with every batched write."""
-    out = list(current or [])
-    for write in writes:
-        out.extend(write if isinstance(write, list) else [write])
-    return out
-
-
-class _State(TypedDict):
-    log: Annotated[list, DeltaChannel(_append, snapshot_frequency=1000)]
-    plain: Annotated[list, add]
-    # Written only by the tests that fork before `log` ever has a value, so the
-    # fork advances without touching the delta channel.
-    other: Annotated[list, add]
-
-
-def _build(checkpointer: BaseCheckpointSaver, tag: str) -> Any:
-    """Compile a one-node graph whose node appends ``{tag}-out`` to both channels.
-
-    ``snapshot_frequency=1000`` keeps the cadence from masking the bug: without
-    a forced snapshot the fork's ancestor walk always runs past the fork base.
-    """
-
-    def node(state: _State) -> dict:
-        return {"log": [f"{tag}-out"], "plain": [f"{tag}-out"]}
-
-    builder = StateGraph(_State)
-    builder.add_node("n", node)
-    builder.set_entry_point("n")
-    builder.set_finish_point("n")
-    return builder.compile(checkpointer=checkpointer)
-
-
-def _build_without_delta_writes(checkpointer: BaseCheckpointSaver, tag: str) -> Any:
-    """Compile a graph whose node writes only ``other``, never the delta channel."""
-
-    def node(state: _State) -> dict:
-        return {"other": [f"{tag}-other"]}
-
-    builder = StateGraph(_State)
-    builder.add_node("n", node)
-    builder.set_entry_point("n")
-    builder.set_finish_point("n")
-    return builder.compile(checkpointer=checkpointer)
-
-
-def _thread(thread_id: str) -> RunnableConfig:
-    return {"configurable": {"thread_id": thread_id}}
-
-
-def _at(config: RunnableConfig, snapshot: StateSnapshot) -> RunnableConfig:
-    """Config addressing one specific checkpoint of ``config``'s thread."""
-    return {
-        "configurable": {
-            **config["configurable"],
-            "checkpoint_ns": "",
-            "checkpoint_id": snapshot.config["configurable"]["checkpoint_id"],
-        }
-    }
-
-
-def _input(marker: str) -> dict:
-    return {"log": [marker], "plain": [marker]}
-
-
-def _snapshotted_checkpoints(
-    checkpointer: BaseCheckpointSaver, config: RunnableConfig
-) -> list[str]:
-    """Ids of this thread's checkpoints carrying a ``log`` snapshot blob."""
-    return [
-        tuple_.config["configurable"]["checkpoint_id"]
-        for tuple_ in checkpointer.list(config)
-        if isinstance(tuple_.checkpoint["channel_values"].get("log"), _DeltaSnapshot)
-    ]
-
-
-def _assert_fork_is_clean(state: StateSnapshot, abandoned: str) -> None:
-    """The delta channel must match the plain channel and drop ``abandoned``."""
-    assert state.values["log"] == state.values["plain"], (
-        f"delta channel diverged from the plain channel: "
-        f"{state.values['log']} != {state.values['plain']}"
-    )
-    assert abandoned not in state.values["log"], (
-        f"{abandoned!r} belongs to the branch the fork replaced, "
-        f"but was replayed into {state.values['log']}"
-    )
-
-
-def test_fork_by_invoke(
-    sync_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    config = _thread("t")
-    _build(sync_checkpointer, "first").invoke(
-        _input("in-1"), config, durability=durability
-    )
-    graph = _build(sync_checkpointer, "second")
-    graph.invoke(_input("in-2"), config, durability=durability)
-
-    # The last checkpoint that predates "in-2" entering state: forking here
-    # abandons the "in-2" branch, whose writes still hang off this checkpoint.
-    base = next(
-        snapshot
-        for snapshot in graph.get_state_history(config)
-        if "in-2" not in snapshot.values["log"]
-    )
-    _build(sync_checkpointer, "third").invoke(
-        _input("in-3"), _at(config, base), durability=durability
-    )
-
-    state = graph.get_state(config)
-    _assert_fork_is_clean(state, "in-2")
-    assert state.values["log"] == [*base.values["log"], "in-3", "third-out"]
-
-
-async def test_afork_by_invoke(
-    async_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    config = _thread("t")
-    await _build(async_checkpointer, "first").ainvoke(
-        _input("in-1"), config, durability=durability
-    )
-    graph = _build(async_checkpointer, "second")
-    await graph.ainvoke(_input("in-2"), config, durability=durability)
-
-    base = await anext(
-        snapshot
-        async for snapshot in graph.aget_state_history(config)
-        if "in-2" not in snapshot.values["log"]
-    )
-    await _build(async_checkpointer, "third").ainvoke(
-        _input("in-3"), _at(config, base), durability=durability
-    )
-
-    state = await graph.aget_state(config)
-    _assert_fork_is_clean(state, "in-2")
-    assert state.values["log"] == [*base.values["log"], "in-3", "third-out"]
-
-
-def test_fork_off_checkpoint_before_first_input(
-    sync_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    """Fork off the root checkpoint, which predates any value for ``log``.
-
-    ``create_checkpoint`` drops a requested snapshot for a channel absent from
-    ``channel_versions``, so the fork's own first checkpoint cannot carry the
-    blob. The request has to stay queued until a superstep gives the channel a
-    value, otherwise the root's ``in-1`` write still leaks into the fork.
-    """
-    config = _thread("t")
-    graph = _build(sync_checkpointer, "first")
-    graph.invoke(_input("in-1"), config, durability=durability)
-
-    root = list(graph.get_state_history(config))[-1]
-    assert root.values["log"] == []
-
-    _build(sync_checkpointer, "third").invoke(
-        _input("in-9"), _at(config, root), durability=durability
-    )
-
-    state = graph.get_state(config)
-    _assert_fork_is_clean(state, "in-1")
-    assert state.values["log"] == ["in-9", "third-out"]
-
-
-async def test_afork_off_checkpoint_before_first_input(
-    async_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    """Async twin of ``test_fork_off_checkpoint_before_first_input``."""
-    config = _thread("t")
-    graph = _build(async_checkpointer, "first")
-    await graph.ainvoke(_input("in-1"), config, durability=durability)
-
-    root = [snapshot async for snapshot in graph.aget_state_history(config)][-1]
-    assert root.values["log"] == []
-
-    await _build(async_checkpointer, "third").ainvoke(
-        _input("in-9"), _at(config, root), durability=durability
-    )
-
-    state = await graph.aget_state(config)
-    _assert_fork_is_clean(state, "in-1")
-    assert state.values["log"] == ["in-9", "third-out"]
-
-
-def test_fork_by_update_state(sync_checkpointer: BaseCheckpointSaver) -> None:
-    config = _thread("t")
-    _build(sync_checkpointer, "first").invoke(_input("in-1"), config)
-    graph = _build(sync_checkpointer, "second")
-    graph.invoke(_input("in-2"), config)
-
-    base = next(
-        snapshot
-        for snapshot in graph.get_state_history(config)
-        if "in-2" not in snapshot.values["log"]
-    )
-    forked = graph.update_state(_at(config, base), _input("patched"))
-
-    state = graph.get_state(forked)
-    _assert_fork_is_clean(state, "in-2")
-    assert state.values["log"] == [*base.values["log"], "patched"]
-
-
-async def test_afork_by_update_state(
-    async_checkpointer: BaseCheckpointSaver,
-) -> None:
-    config = _thread("t")
-    await _build(async_checkpointer, "first").ainvoke(_input("in-1"), config)
-    graph = _build(async_checkpointer, "second")
-    await graph.ainvoke(_input("in-2"), config)
-
-    base = await anext(
-        snapshot
-        async for snapshot in graph.aget_state_history(config)
-        if "in-2" not in snapshot.values["log"]
-    )
-    forked = await graph.aupdate_state(_at(config, base), _input("patched"))
-
-    state = await graph.aget_state(forked)
-    _assert_fork_is_clean(state, "in-2")
-    assert state.values["log"] == [*base.values["log"], "patched"]
-
-
-def test_unaddressed_run_keeps_snapshot_cadence(
-    sync_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    """A run with no explicitly addressed checkpoint writes no snapshot blob.
-
-    Guards the cost of the fix: the forced snapshot is one per addressed run,
-    not a change to the normal ``snapshot_frequency`` cadence.
-    """
-    config = _thread("t")
-    graph = _build(sync_checkpointer, "first")
-    graph.invoke(_input("in-1"), config, durability=durability)
-    graph.invoke(_input("in-2"), config, durability=durability)
-
-    assert not _snapshotted_checkpoints(sync_checkpointer, config)
-
-
-def test_fork_before_first_value_when_fork_never_writes_the_channel(
-    sync_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    """Seal the fork even when the channel has no value to snapshot.
-
-    Forking before ``log`` was ever written leaves nothing to copy into the
-    fork's first checkpoint, so without a minted version and an empty blob the
-    boundary goes unrecorded and the walk runs into the base. The fork here
-    never writes ``log`` at all, so no later superstep can seal it either.
-    """
-    config = _thread("t")
-    graph = _build(sync_checkpointer, "first")
-    graph.invoke(_input("in-1"), config, durability=durability)
-
-    root = list(graph.get_state_history(config))[-1]
-    assert root.values["log"] == []
-
-    _build_without_delta_writes(sync_checkpointer, "third").invoke(
-        {"other": ["in-9"]}, _at(config, root), durability=durability
-    )
-
-    state = graph.get_state(config)
-    _assert_fork_is_clean(state, "in-1")
-    assert state.values["log"] == []
-
-
-async def test_afork_before_first_value_when_fork_never_writes_the_channel(
-    async_checkpointer: BaseCheckpointSaver, durability: Durability
-) -> None:
-    """Async twin of ``test_fork_before_first_value_when_fork_never_writes_the_channel``."""
-    config = _thread("t")
-    graph = _build(async_checkpointer, "first")
-    await graph.ainvoke(_input("in-1"), config, durability=durability)
-
-    root = [snapshot async for snapshot in graph.aget_state_history(config)][-1]
-    assert root.values["log"] == []
-
-    await _build_without_delta_writes(async_checkpointer, "third").ainvoke(
-        {"other": ["in-9"]}, _at(config, root), durability=durability
-    )
-
-    state = await graph.aget_state(config)
-    _assert_fork_is_clean(state, "in-1")
-    assert state.values["log"] == []
-
-
-def test_fork_before_first_value_by_bulk_update(
-    sync_checkpointer: BaseCheckpointSaver,
-) -> None:
-    """The fork's first superstep touches another key, the delta key comes later.
-
-    The first checkpoint has to seal the boundary on its own. Deferring until
-    the superstep that finally writes ``log`` is too late, because that
-    superstep reconstructs through the unsealed checkpoint first.
-    """
-    config = _thread("t")
-    graph = _build(sync_checkpointer, "first")
-    graph.invoke(_input("in-1"), config)
-
-    root = list(graph.get_state_history(config))[-1]
-    assert root.values["log"] == []
-
-    forked = graph.bulk_update_state(
-        _at(config, root),
-        [
-            [StateUpdate({"other": ["s1"]}, "n")],
-            [StateUpdate(_input("s2"), "n")],
-        ],
-    )
-
-    state = graph.get_state(forked)
-    _assert_fork_is_clean(state, "in-1")
-    assert state.values["log"] == ["s2"]
-
-
-@pytest.mark.parametrize("first_as_node", [INPUT, END, "__copy__"])
-def test_fork_by_bulk_update_whose_first_superstep_skips_the_plan(
-    sync_checkpointer: BaseCheckpointSaver, first_as_node: str
-) -> None:
-    """The fork must be sealed by whichever checkpoint the fork writes first.
-
-    ``as_node`` of INPUT, END or ``__copy__`` writes a checkpoint and returns
-    before ``create_checkpoint_plan_for_update_state_api`` runs. If that
-    checkpoint carries no snapshot the branch is still unsealed, so the next
-    superstep reconstructs through the shared base, picks up the abandoned
-    writes, and bakes them into whatever it snapshots. Sealing later is too
-    late: by then the in-memory value is already wrong.
-    """
-    config = _thread("t")
-    _build(sync_checkpointer, "first").invoke(_input("in-1"), config)
-    graph = _build(sync_checkpointer, "second")
-    graph.invoke(_input("in-2"), config)
-
-    base = next(
-        snapshot
-        for snapshot in graph.get_state_history(config)
-        if "in-2" not in snapshot.values["log"]
-    )
-    first = (
-        StateUpdate(_input("first-step"), first_as_node)
-        if first_as_node == INPUT
-        else StateUpdate(None, first_as_node)
-    )
-    forked = graph.bulk_update_state(
-        _at(config, base),
-        [[first], [StateUpdate(_input("second-step"), "n")]],
-    )
-
-    state = graph.get_state(forked)
-    # END legitimately absorbs the base's already-run task writes, so "in-2"
-    # belongs there; the plain channel is the oracle for which is which.
-    assert state.values["log"] == state.values["plain"], (
-        f"delta channel diverged from the plain channel: "
-        f"{state.values['log']} != {state.values['plain']}"
-    )
-
-
-def test_unaddressed_bulk_update_keeps_snapshot_cadence(
-    sync_checkpointer: BaseCheckpointSaver,
-) -> None:
-    """A multi-superstep ``bulk_update_state`` forks at most once, at the head.
-
-    ``perform_superstep`` returns the config of the checkpoint it just wrote
-    and the driver feeds that back in, so every superstep after the first
-    receives a config naming a checkpoint even when the caller addressed none.
-    Deriving the fork flag from that config snapshots the whole growing value
-    once per superstep.
-    """
-    config = _thread("t")
-    graph = _build(sync_checkpointer, "first")
-    graph.invoke(_input("in-1"), config)
-
-    graph.bulk_update_state(
-        config,
-        [[StateUpdate(_input(f"u{i}"), "n")] for i in range(4)],
-    )
-
-    assert not _snapshotted_checkpoints(sync_checkpointer, config)

libs/langgraph/tests/test_delta_channel_update_state.py

@@ -1,19 +1,20 @@
 """Tests for `update_state` / `aupdate_state` against `DeltaChannel`.
 
-Regression suite for deepagents#3774 and Postgres read-path compatibility.
-
-Fresh-thread ``update_state`` force-snapshots DeltaChannels (1.2.8). Non-fresh
-``update_state`` persists ``checkpoint_writes`` on the parent, advances
-``counters_since_delta_snapshot`` on the new head, and snapshots when a
-channel reaches ``snapshot_frequency`` (mirroring normal run cadence).
+Originally a regression suite for deepagents#3774 — `update_state` on a *fresh*
+thread silently dropped the first write to a `DeltaChannel`-backed channel
+because channel writes were only persisted when a previous checkpoint existed.
+Fixed by lazily persisting an empty stub checkpoint on a fresh thread so the
+first write has a parent to anchor under (mirrors the exit-mode lazy-stub
+pattern in `_loop._put_exit_delta_writes`).
 
 Coverage:
 
-* fresh-thread regression: single ``update_state`` writes a message and reads back
-* non-fresh thread: ``update_state`` after ``invoke``, after another ``update_state``,
-  and ``bulk_update_state`` with multiple per-superstep updates
-* update-by-id end-to-end via ``update_state`` (DeltaChannel reducer semantics)
-* fresh-thread head is snapshotted; non-fresh heads carry delta replay counters
+* fresh-thread regression: single `update_state` writes a message and reads back
+* non-fresh thread: `update_state` after `invoke`, after another `update_state`,
+  and `bulk_update_state` with multiple per-superstep updates
+* update-by-id end-to-end via `update_state` (DeltaChannel reducer semantics)
+* state-history chain shape on a fresh thread (lazy stub + update checkpoint
+  with correct parent linking)
 """
 
 from typing import Annotated, Any
@@ -21,31 +22,22 @@ from typing import Annotated, Any
 import pytest
 from langchain_core.messages import HumanMessage
 from langgraph.checkpoint.memory import InMemorySaver
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
 from typing_extensions import TypedDict
 
 from langgraph.channels.delta import DeltaChannel
 from langgraph.graph import START, StateGraph
 from langgraph.graph.message import _messages_delta_reducer
-from langgraph.types import StateUpdate
 
 pytestmark = pytest.mark.anyio
 
 
-def _build_graph(
-    checkpointer: InMemorySaver,
-    *,
-    two_nodes: bool = False,
-    snapshot_frequency: int = 1000,
-) -> Any:
+def _build_graph(checkpointer: InMemorySaver, *, two_nodes: bool = False) -> Any:
     """Compile a minimal DeltaChannel-backed `messages` graph.
 
     `two_nodes=True` adds a second writer node so `bulk_update_state` can route
     distinct updates to different `as_node` values within a single superstep.
     """
-    channel = DeltaChannel(
-        _messages_delta_reducer, snapshot_frequency=snapshot_frequency
-    )
+    channel = DeltaChannel(_messages_delta_reducer)
     State = TypedDict("State", {"messages": Annotated[list, channel]})  # type: ignore[call-overload]  # noqa: UP013
 
     def model(state: dict) -> dict:
@@ -95,30 +87,14 @@ async def test_aupdate_state_fresh_thread_delta_channel() -> None:
     assert [m.content for m in state.values["messages"]] == ["hello"]
 
 
-def test_fresh_update_state_head_snapshots_delta_channel() -> None:
-    saver = InMemorySaver()
-    graph = _build_graph(saver)
-    config = {"configurable": {"thread_id": "fresh-head-snapshot"}}
-
-    graph.update_state(
-        config,
-        {"messages": [HumanMessage(content="hello", id="m1")]},
-        as_node="model",
-    )
-
-    head = saver.get_tuple(config)
-    assert head is not None
-    assert isinstance(head.checkpoint["channel_values"].get("messages"), _DeltaSnapshot)
-    assert head.metadata is not None
-    assert "counters_since_delta_snapshot" not in head.metadata
-
-
 # ---------------------------------------------------------------------------
 # Non-fresh thread: update_state after invoke
 # ---------------------------------------------------------------------------
 
 
 def test_update_state_after_invoke_delta_channel() -> None:
+    """The non-fresh-thread path was already working before the fix; pin it
+    down so the lazy-stub change for fresh threads doesn't regress it."""
     saver = InMemorySaver()
     graph = _build_graph(saver)
     config = {"configurable": {"thread_id": "after-invoke-sync"}}
@@ -134,12 +110,6 @@ def test_update_state_after_invoke_delta_channel() -> None:
     assert [m.content for m in state.values["messages"]] == ["seed", "appended"]
     assert [m.id for m in state.values["messages"]] == ["m1", "m2"]
 
-    head = saver.get_tuple(config)
-    assert head is not None
-    assert "messages" not in head.checkpoint["channel_values"]
-    assert head.metadata is not None
-    assert head.metadata["counters_since_delta_snapshot"]["messages"] == [2, 4]
-
 
 async def test_aupdate_state_after_invoke_delta_channel() -> None:
     saver = InMemorySaver()
@@ -163,6 +133,9 @@ async def test_aupdate_state_after_invoke_delta_channel() -> None:
 
 
 def test_consecutive_update_states_delta_channel() -> None:
+    """First update_state lazily persists a stub; the second sees a real
+    parent (`saved is not None`) and takes the original write path. Both
+    messages must round-trip in chronological order."""
     saver = InMemorySaver()
     graph = _build_graph(saver)
     config = {"configurable": {"thread_id": "consecutive-sync"}}
@@ -182,39 +155,6 @@ def test_consecutive_update_states_delta_channel() -> None:
     assert [m.content for m in state.values["messages"]] == ["first", "second"]
     assert [m.id for m in state.values["messages"]] == ["m1", "m2"]
 
-    head = saver.get_tuple(config)
-    assert head is not None
-    assert "messages" not in head.checkpoint["channel_values"]
-    assert head.metadata is not None
-    assert head.metadata["counters_since_delta_snapshot"]["messages"] == [1, 1]
-
-
-def test_update_state_snapshots_at_frequency() -> None:
-    """Non-fresh update_state snapshots when counters reach snapshot_frequency."""
-    saver = InMemorySaver()
-    graph = _build_graph(saver, snapshot_frequency=1)
-    config = {"configurable": {"thread_id": "snapshot-at-freq"}}
-
-    graph.update_state(
-        config,
-        {"messages": [HumanMessage(content="first", id="m1")]},
-        as_node="model",
-    )
-    graph.update_state(
-        config,
-        {"messages": [HumanMessage(content="second", id="m2")]},
-        as_node="model",
-    )
-
-    state = graph.get_state(config)
-    assert [m.content for m in state.values["messages"]] == ["first", "second"]
-
-    head = saver.get_tuple(config)
-    assert head is not None
-    assert isinstance(head.checkpoint["channel_values"].get("messages"), _DeltaSnapshot)
-    assert head.metadata is not None
-    assert "counters_since_delta_snapshot" not in head.metadata
-
 
 async def test_aconsecutive_update_states_delta_channel() -> None:
     saver = InMemorySaver()
@@ -278,6 +218,7 @@ def test_bulk_update_state_multi_task_per_superstep_delta_channel() -> None:
     different `StateUpdate`s targeting the same node — otherwise both share
     the deterministic interrupt-derived id and collide in the saver.
     """
+    from langgraph.types import StateUpdate
 
     saver = InMemorySaver()
     graph = _build_graph(saver)
@@ -311,14 +252,14 @@ def test_bulk_update_state_multi_task_per_superstep_delta_channel() -> None:
 
 
 # ---------------------------------------------------------------------------
-# Public-API observation of fresh-thread checkpoint shape
+# Public-API observation of the lazy-stub mechanism
 # ---------------------------------------------------------------------------
 
 
 def test_state_history_chain_after_fresh_update_state_delta_channel() -> None:
-    """A fresh-thread `update_state` should produce a single self-contained
-    checkpoint visible via `get_state_history`: step=0, `source='update'`,
-    no parent, with the DeltaChannel value snapshotted inline."""
+    """A fresh-thread `update_state` should produce two checkpoints visible
+    via `get_state_history`: a stub (step=-1, no parent) and the update
+    (step=0, parent=stub). Both attributed `source='update'`."""
     saver = InMemorySaver()
     graph = _build_graph(saver)
     config = {"configurable": {"thread_id": "history-chain"}}
@@ -329,12 +270,25 @@ def test_state_history_chain_after_fresh_update_state_delta_channel() -> None:
         as_node="model",
     )
 
+    # Newest first per `get_state_history` ordering.
     history = list(graph.get_state_history(config))
-    assert len(history) == 1
+    assert len(history) == 2
+
+    update_snapshot, stub_snapshot = history
 
-    (update_snapshot,) = history
     assert update_snapshot.metadata is not None
     assert update_snapshot.metadata["source"] == "update"
     assert update_snapshot.metadata["step"] == 0
-    assert update_snapshot.parent_config is None
     assert [m.content for m in update_snapshot.values["messages"]] == ["hello"]
+
+    assert stub_snapshot.metadata is not None
+    assert stub_snapshot.metadata["source"] == "update"
+    assert stub_snapshot.metadata["step"] == -1
+    assert stub_snapshot.parent_config is None
+
+    # The update checkpoint's parent is the stub.
+    assert update_snapshot.parent_config is not None
+    assert (
+        update_snapshot.parent_config["configurable"]["checkpoint_id"]
+        == stub_snapshot.config["configurable"]["checkpoint_id"]
+    )