Add Go CLI CI smoke coverage

Fix Go CLI parity and wheel packaging
Merge branch 'main' into wfh/cli_validate
2026-08-27 01:52:25 +02:00 · 2026-04-08 16:07:25 -07:00 · 2026-04-08 14:50:52 -07:00 · 2026-04-08 05:56:49 -07:00 · 2026-04-08 05:47:23 -07:00 · 2026-04-08 05:40:59 -07:00
162 changed files with 14143 additions and 25374 deletions
@@ -9,6 +9,9 @@ on:
 permissions:
  contents: read

+env:
+  GO_VERSION: "1.23"
+
 jobs:
  build:
    runs-on: ubuntu-latest
@@ -51,12 +54,23 @@ jobs:
          python-version: ${{ matrix.python-version }}
          enable-cache: "false"
          working-directory: libs/cli
+      - name: Set up Go
+        if: (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch')
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
      - name: Install cli globally
        if: (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch')
        run: pip install -e .
+      - name: Build Go CLI binary
+        if: (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch')
+        run: make build-go
      - name: Build service ${{ matrix.example.name }}
        if: (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch')
        working-directory: ${{ matrix.example.workdir }}
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          langgraph build -t ${{ matrix.example.tag }}
      - name: Test service ${{ matrix.example.name }}
@@ -64,6 +78,8 @@ jobs:
        working-directory: ${{ matrix.example.workdir }}
        env:
          LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY }}
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          # Prepare environment file from local or parent example directory
          if [ -f .env.example ]; then cp .env.example .env; elif [ -f ../.env.example ]; then cp ../.env.example .env && cp ../.env.example ../.env; fi
@@ -76,18 +92,27 @@ jobs:
      - name: Build JS service
        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
        working-directory: libs/cli/js-examples
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          langgraph build -t langgraph-test-e

      - name: Build JS monorepo service
        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
        working-directory: libs/cli/js-monorepo-example
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          langgraph build -t langgraph-test-f -c apps/agent/langgraph.json --build-command "yarn run turbo build" --install-command "yarn install"

      - name: Build Python monorepo service
        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
        working-directory: libs/cli/python-monorepo-example
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          langgraph build -t langgraph-test-g -c apps/agent/langgraph.json
      - name: Test Python monorepo service
@@ -95,6 +120,8 @@ jobs:
        working-directory: libs/cli/python-monorepo-example
        env:
          LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY }}
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          cp apps/agent/.env.example apps/agent/.env
          echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> apps/agent/.env
@@ -103,6 +130,9 @@ jobs:
      - name: Build prerelease reqs service
        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
        working-directory: libs/cli/examples/graph_prerelease_reqs
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          langgraph build -t langgraph-test-h
      - name: Test prerelease reqs service
@@ -110,6 +140,8 @@ jobs:
        working-directory: libs/cli/examples/graph_prerelease_reqs
        env:
          LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY }}
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          cp ../.env.example .env
          echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> .env
@@ -121,8 +153,8 @@ jobs:
            exit 1
          fi
          LANGCHAIN_OPENAI_VERSION=$(docker run --rm --entrypoint "" langgraph-test-h python -c "import sys; from importlib.metadata import version; v = version('langchain-openai'); print(v);")
-          if [ "$LANGCHAIN_OPENAI_VERSION" != "1.1.14" ]; then
-            echo "LANGCHAIN_OPENAI_VERSION != 1.1.14; $LANGCHAIN_OPENAI_VERSION"
+          if [ "$LANGCHAIN_OPENAI_VERSION" != "1.0.1" ]; then
+            echo "LANGCHAIN_OPENAI_VERSION != 1.0.1; $LANGCHAIN_OPENAI_VERSION"
            exit 1
          fi
          LANGCHAIN_ANTHROPIC_VERSION=$(docker run --rm --entrypoint "" langgraph-test-h python -c "import sys; from importlib.metadata import version; v = version('langchain-anthropic'); print(v);")
@@ -134,12 +166,18 @@ jobs:
      - name: Build and test prerelease reqs fail service
        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
        working-directory: libs/cli/examples/graph_prerelease_reqs_fail
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          langgraph build -t langgraph-test-i || [ $? -eq 1 ]

      - name: Build uv simple service
        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
        working-directory: libs/cli/uv-examples/simple
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          langgraph build -t langgraph-test-uv-simple
      - name: Test uv simple service
@@ -147,6 +185,8 @@ jobs:
        working-directory: libs/cli/uv-examples/simple
        env:
          LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY }}
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          cp .env.example .env
          echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> .env
@@ -155,6 +195,9 @@ jobs:
      - name: Build uv monorepo service
        if: ${{ (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') &&matrix.example.name == 'A' }}
        working-directory: libs/cli/uv-examples/monorepo/apps/agent
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          langgraph build -t langgraph-test-uv-monorepo
      - name: Test uv monorepo service
@@ -162,6 +205,8 @@ jobs:
        working-directory: libs/cli/uv-examples/monorepo/apps/agent
        env:
          LANGSMITH_API_KEY: ${{ secrets.LANGSMITH_API_KEY }}
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
        run: |
          cp .env.example .env
          echo "LANGSMITH_API_KEY=${{ secrets.LANGSMITH_API_KEY }}" >> .env
@@ -11,6 +11,9 @@ on:
 permissions:
  contents: read

+env:
+  GO_VERSION: "1.23"
+
 jobs:
  build:
    runs-on: ubuntu-latest
@@ -26,14 +29,25 @@ jobs:
    name: "test #${{ matrix.python-version }}"
    steps:
      - uses: actions/checkout@v6
+      - name: Get changed files
+        id: changed-files
+        if: ${{ inputs.working-directory == 'libs/cli' && github.event_name != 'workflow_dispatch' }}
+        uses: Ana06/get-changed-files@25f79e676e7ea1868813e21465014798211fad8c # v2.3.0
+        with:
+          filter: "libs/cli/**"
      - name: Set up Python ${{ matrix.python-version }}
        uses: ./.github/actions/uv_setup
        with:
          python-version: ${{ matrix.python-version }}
          cache-suffix: test-${{ inputs.working-directory }}
          working-directory: ${{ inputs.working-directory }}
+      - name: Set up Go
+        if: ${{ inputs.working-directory == 'libs/cli' && (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') }}
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
      - name: Login to Docker Hub
-        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4
+        uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2 # v4
        if: ${{ !github.event.pull_request.head.repo.fork }}
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -44,11 +58,26 @@ jobs:
        working-directory: ${{ inputs.working-directory }}
        run: uv sync --frozen --group test --no-dev

+      - name: Build Go CLI binary
+        if: ${{ inputs.working-directory == 'libs/cli' && (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') }}
+        shell: bash
+        working-directory: ${{ inputs.working-directory }}
+        run: make build-go
+
      - name: Run tests
        shell: bash
        working-directory: ${{ inputs.working-directory }}
        run: make test

+      - name: Run Go CLI smoke tests
+        if: ${{ inputs.working-directory == 'libs/cli' && (steps.changed-files.outputs.all || github.event_name == 'workflow_dispatch') }}
+        shell: bash
+        working-directory: ${{ inputs.working-directory }}
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+          LANGGRAPH_GO_CLI_PATH: ${{ github.workspace }}/libs/cli/langgraph_cli/bin/langgraph
+        run: TEST='tests/unit_tests/test_go_cli_smoke.py' make test
+
      - name: Ensure the tests did not create any additional files
        shell: bash
        working-directory: ${{ inputs.working-directory }}
@@ -31,7 +31,7 @@ jobs:
          cache-suffix: "test-langgraph"
          working-directory: libs/langgraph
      - name: Login to Docker Hub
-        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4
+        uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2 # v4
        if: ${{ !github.event.pull_request.head.repo.fork }}
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -10,6 +10,7 @@ on:

 env:
  PYTHON_VERSION: "3.10"
+  GO_VERSION: "1.23"

 permissions:
  contents: read
@@ -32,6 +33,17 @@ jobs:
          cache-suffix: "release"
          working-directory: ${{ inputs.working-directory }}

+      - name: Set up Go
+        if: inputs.working-directory == 'libs/cli'
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Cross-compile Go binaries
+        if: inputs.working-directory == 'libs/cli'
+        working-directory: ${{ inputs.working-directory }}
+        run: make build-go-all GO_BIN_DIR=build/go-bin
+
      # We want to keep this build stage *separate* from the release stage,
      # so that there's no sharing of permissions between them.
      # The release stage has trusted publishing and GitHub repo contents write access,
@@ -43,7 +55,40 @@ jobs:
      # > It is strongly advised to separate jobs for building [...]
      # > from the publish job.
      # https://github.com/pypa/gh-action-pypi-publish#non-goals
+      - name: Build CLI platform wheels
+        if: inputs.working-directory == 'libs/cli'
+        working-directory: ${{ inputs.working-directory }}
+        run: |
+          TARGETS=(
+            "linux-amd64     manylinux_2_17_x86_64.manylinux2014_x86_64"
+            "linux-arm64     manylinux_2_17_aarch64.manylinux2014_aarch64"
+            "linux-arm       manylinux_2_17_armv7l.manylinux2014_armv7l"
+            "linux-386       manylinux_2_17_i686.manylinux2014_i686"
+            "linux-ppc64le   manylinux_2_17_ppc64le.manylinux2014_ppc64le"
+            "linux-s390x     manylinux_2_17_s390x.manylinux2014_s390x"
+            "linux-amd64     musllinux_1_2_x86_64"
+            "linux-arm64     musllinux_1_2_aarch64"
+            "linux-arm       musllinux_1_2_armv7l"
+            "linux-386       musllinux_1_2_i686"
+            "darwin-amd64    macosx_11_0_x86_64"
+            "darwin-arm64    macosx_11_0_arm64"
+            "windows-amd64   win_amd64"
+            "windows-arm64   win_arm64"
+            "windows-386     win32"
+          )
+          for entry in "${TARGETS[@]}"; do
+            key=$(echo "$entry" | awk '{print $1}')
+            plat=$(echo "$entry" | awk '{print $2}')
+            ext=""
+            if [[ "$key" == windows-* ]]; then ext=".exe"; fi
+            binary="build/go-bin/langgraph-${key}${ext}"
+            LANGGRAPH_GO_BINARY="$binary" LANGGRAPH_WHEEL_PLAT="$plat" uv build --wheel
+          done
+          rm -rf langgraph_cli/bin
+          uv build
+
      - name: Build project for distribution
+        if: inputs.working-directory != 'libs/cli'
        run: uv build
        working-directory: ${{ inputs.working-directory }}

@@ -82,7 +127,7 @@ jobs:
          path: ${{ inputs.working-directory }}/dist/

      - name: Publish to test PyPI
-        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
+        uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e # release/v1
        with:
          packages-dir: ${{ inputs.working-directory }}/dist/
          verbose: true
@@ -57,7 +57,7 @@ jobs:
            echo EOF
          } >> "$GITHUB_OUTPUT"
      - name: Annotation
-        uses: actions/github-script@v9
+        uses: actions/github-script@v8
        with:
          script: |
            const file = JSON.parse(`${{ steps.files.outputs.added_modified_renamed }}`)[0]
@@ -40,7 +40,7 @@ jobs:
        uses: actions/configure-pages@v6

      - name: Upload artifact
-        uses: actions/upload-pages-artifact@v5
+        uses: actions/upload-pages-artifact@v4
        with:
          path: 'docs/_site'

@@ -13,6 +13,7 @@ permissions:

 env:
  PYTHON_VERSION: "3.11"
+  GO_VERSION: "1.23"

 jobs:
  build:
@@ -34,6 +35,71 @@ jobs:
          cache-suffix: "release"
          working-directory: ${{ inputs.working-directory }}

+      # -- Go cross-compilation (libs/cli only) --
+      # When releasing the CLI, we cross-compile the Go binary for each
+      # platform and build platform-specific wheels that bundle it.
+      - name: Set up Go
+        if: inputs.working-directory == 'libs/cli'
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Cross-compile Go binaries
+        if: inputs.working-directory == 'libs/cli'
+        working-directory: ${{ inputs.working-directory }}
+        run: make build-go-all GO_BIN_DIR=build/go-bin
+
+      - name: Run Go tests
+        if: inputs.working-directory == 'libs/cli'
+        working-directory: ${{ inputs.working-directory }}
+        run: go test -count=1 -race ./...
+
+      - name: Build CLI platform wheels
+        if: inputs.working-directory == 'libs/cli'
+        working-directory: ${{ inputs.working-directory }}
+        run: |
+          # Each entry: GO_BINARY_KEY WHEEL_PLATFORM_TAG
+          #
+          # Since Go builds are statically linked (CGO_ENABLED=0), the same
+          # linux binary works on both glibc and musl. We produce separate
+          # manylinux and musllinux wheels so pip installs the right one.
+          TARGETS=(
+            # Linux glibc
+            "linux-amd64     manylinux_2_17_x86_64.manylinux2014_x86_64"
+            "linux-arm64     manylinux_2_17_aarch64.manylinux2014_aarch64"
+            "linux-arm       manylinux_2_17_armv7l.manylinux2014_armv7l"
+            "linux-386       manylinux_2_17_i686.manylinux2014_i686"
+            "linux-ppc64le   manylinux_2_17_ppc64le.manylinux2014_ppc64le"
+            "linux-s390x     manylinux_2_17_s390x.manylinux2014_s390x"
+            # Linux musl (same Go binaries, different wheel tag)
+            "linux-amd64     musllinux_1_2_x86_64"
+            "linux-arm64     musllinux_1_2_aarch64"
+            "linux-arm       musllinux_1_2_armv7l"
+            "linux-386       musllinux_1_2_i686"
+            # macOS
+            "darwin-amd64    macosx_11_0_x86_64"
+            "darwin-arm64    macosx_11_0_arm64"
+            # Windows
+            "windows-amd64   win_amd64"
+            "windows-arm64   win_arm64"
+            "windows-386     win32"
+          )
+          for entry in "${TARGETS[@]}"; do
+            key=$(echo "$entry" | awk '{print $1}')
+            plat=$(echo "$entry" | awk '{print $2}')
+            ext=""
+            if [[ "$key" == windows-* ]]; then ext=".exe"; fi
+            binary="build/go-bin/langgraph-${key}${ext}"
+            echo "Building wheel for ${key} -> ${plat}..."
+            LANGGRAPH_GO_BINARY="$binary" LANGGRAPH_WHEEL_PLAT="$plat" uv build --wheel
+          done
+          # Also build the sdist and pure-Python fallback wheel
+          rm -rf langgraph_cli/bin
+          uv build
+          echo "All wheels built:"
+          ls -lh dist/
+
+      # -- Standard build (all other packages) --
      # We want to keep this build stage *separate* from the release stage,
      # so that there's no sharing of permissions between them.
      # The release stage has trusted publishing and GitHub repo contents write access,
@@ -46,6 +112,7 @@ jobs:
      # > from the publish job.
      # https://github.com/pypa/gh-action-pypi-publish#non-goals
      - name: Build project for distribution
+        if: inputs.working-directory != 'libs/cli'
        run: uv build
        working-directory: ${{ inputs.working-directory }}

@@ -241,6 +308,13 @@ jobs:
        run: make test
        working-directory: ${{ inputs.working-directory }}

+      - name: Run Go CLI smoke tests
+        if: inputs.working-directory == 'libs/cli'
+        working-directory: ${{ inputs.working-directory }}
+        env:
+          LANGGRAPH_USE_GO_CLI: "1"
+        run: uv run pytest tests/unit_tests/test_go_cli_smoke.py
+
  publish:
    needs:
      - build
@@ -276,7 +350,7 @@ jobs:
          path: ${{ inputs.working-directory }}/dist/

      - name: Publish package distributions to PyPI
-        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
+        uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e # release/v1
        with:
          packages-dir: ${{ inputs.working-directory }}/dist/
          verbose: true
@@ -26,7 +26,7 @@ jobs:

    steps:
      - name: Find and reopen matching PRs
-        uses: actions/github-script@v9
+        uses: actions/github-script@v8
        with:
          script: |
            const { owner, repo } = context.repo;
@@ -50,7 +50,7 @@ jobs:
    steps:
      - name: Check for issue link and assignee
        id: check-link
-        uses: actions/github-script@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        with:
          script: |
            const { owner, repo } = context.repo;
@@ -63,7 +63,7 @@ jobs:
      - name: Check if contributor is external
        if: steps.app-token.outcome == 'success'
        id: check-membership
-        uses: actions/github-script@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
@@ -196,7 +196,7 @@ jobs:
          private-key: ${{ secrets.ORG_MEMBERSHIP_APP_PRIVATE_KEY }}

      - name: Backfill labels
-        uses: actions/github-script@v9
+        uses: actions/github-script@v8
        with:
          github-token: ${{ steps.app-token.outputs.token }}
          script: |
@@ -48,7 +48,7 @@ jobs:
      - name: Check if contributor is external
        if: steps.app-token.outcome == 'success'
        id: check-membership
-        uses: actions/github-script@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        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@v9
+        uses: actions/github-script@v8
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
@@ -28,7 +28,7 @@ jobs:
        run: make lock-upgrade
          
      - name: Create Pull Request
-        uses: peter-evans/create-pull-request@5f6978faf089d4d20b00c7766989d076bb2fc7f1 # v8
+        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: "chore(deps): upgrade dependencies with `uv lock --upgrade`"
@@ -100,4 +100,3 @@ dmypy.json
 .turbo
 .editorconfig
 .scratch
-.worktrees/
@@ -16,7 +16,7 @@
  <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://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>
+  <a href="https://x.com/langchain" target="_blank"><img src="https://img.shields.io/twitter/url/https/twitter.com/langchain.svg?style=social&label=Follow%20%40LangChain" alt="Twitter / X"></a>
 </div>

 <br>
@@ -27,10 +27,10 @@ Trusted by companies shaping the future of agents – including Klarna, Replit,
 pip install -U langgraph
 ```

-> [!TIP]
-> If you're looking to quickly build agents, check out **[Deep Agents](https://docs.langchain.com/oss/python/deepagents/overview)** — a higher-level package built on LangGraph for agents that can plan, use subagents, and leverage file systems for complex tasks.
+If you're looking to quickly build agents with LangChain's `create_agent` (built on LangGraph), check out the [LangChain Agents documentation](https://docs.langchain.com/oss/python/langchain/agents).

-For an equivalent JS/TS library, check out [LangGraph.js](https://github.com/langchain-ai/langgraphjs) and the [JS docs](https://docs.langchain.com/oss/javascript/langgraph/overview).
+> [!NOTE]
+> Looking for the JS/TS library? Check out [LangGraph.js](https://github.com/langchain-ai/langgraphjs) and the [JS docs](https://docs.langchain.com/oss/javascript/langgraph/overview).

 ## Why use LangGraph?

@@ -51,7 +51,7 @@ While LangGraph can be used standalone, it also integrates seamlessly with any L

 To improve your LLM application development, pair LangGraph with:

- [Deep Agents](https://docs.langchain.com/oss/python/deepagents/overview) – Build agents that can plan, use subagents, and leverage file systems for complex tasks.
+- [Deep Agents](https://github.com/langchain-ai/deepagents) *(new!)* – Build agents that can plan, use subagents, and leverage file systems for complex tasks.
 - [LangChain](https://docs.langchain.com/oss/python/langchain/overview) – Provides integrations and composable components to streamline LLM application development.
 - [LangSmith](https://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 [LangSmith Studio](https://docs.langchain.com/langsmith/studio).
@@ -339,6 +339,7 @@ async def test_list_metadata_custom_keys(
    assert results[0].metadata["run_id"] == "run-abc"


+
 ALL_LIST_TESTS = [
    test_list_all,
    test_list_by_thread,
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-version = "1.2.28"
+version = "1.2.22"
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    { name = "uuid-utils" },
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 [[package]]
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-version = "4.0.3"
+version = "4.0.1"
 source = { registry = "https://pypi.org/simple" }
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    { name = "ormsgpack" },
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 [[package]]
 name = "langgraph-checkpoint-conformance"
-version = "0.0.2"
+version = "0.0.1"
 source = { editable = "." }
 dependencies = [
    { name = "langgraph-checkpoint" },
@@ -306,7 +306,7 @@ test = [

 [[package]]
 name = "langsmith"
-version = "0.7.31"
+version = "0.7.3"
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 dependencies = [
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+    { url = "https://files.pythonhosted.org/packages/0e/1a/824b3496d66852ed7d5d68d9787711131552b68dce8835ce9410db32e618/ty-0.0.27-py3-none-win_arm64.whl", hash = "sha256:95bf8d01eb96bb2ba3ffc39faff19da595176448e80871a7b362f4d2de58476c", size = 10376689, upload-time = "2026-03-31T19:07:25.732Z" },
 ]

 [[package]]
@@ -6,11 +6,6 @@ Implementation of LangGraph CheckpointSaver that uses Postgres.

 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
-
-> [!IMPORTANT]
-> Set `LANGGRAPH_STRICT_MSGPACK=true` or pass an explicit `allowed_msgpack_modules` list when creating your checkpointer. This restricts checkpoint deserialization to known-safe types, preventing code execution if the database is compromised. See the [langgraph-checkpoint README](https://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint#serde) for details.
-
 ## Usage

 > [!IMPORTANT]
@@ -2,9 +2,9 @@ from __future__ import annotations

 import threading
 from collections import defaultdict
-from collections.abc import Iterator, Mapping, Sequence
+from collections.abc import Iterator, Sequence
 from contextlib import contextmanager
-from typing import Any, cast
+from typing import Any

 from langchain_core.runnables import RunnableConfig
 from langgraph.checkpoint.base import (
@@ -13,25 +13,17 @@ from langgraph.checkpoint.base import (
    Checkpoint,
    CheckpointMetadata,
    CheckpointTuple,
-    DeltaChannelHistory,
    get_checkpoint_id,
    get_serializable_checkpoint_metadata,
 )
 from langgraph.checkpoint.serde.base import SerializerProtocol
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
 from psycopg import Capabilities, Connection, Cursor, Pipeline
 from psycopg.rows import DictRow, dict_row
 from psycopg.types.json import Jsonb
 from psycopg_pool import ConnectionPool

 from langgraph.checkpoint.postgres import _internal
-from langgraph.checkpoint.postgres.base import (
-    _DELTA_PAGE_SIZE,
-    BasePostgresSaver,
-    _build_delta_stage1_sql,
-    _build_delta_stage2_sql,
-    _DeltaStage2Row,
-)
+from langgraph.checkpoint.postgres.base import BasePostgresSaver
 from langgraph.checkpoint.postgres.shallow import ShallowPostgresSaver

 Conn = _internal.Conn  # For backward compatibility
@@ -310,10 +302,7 @@ class PostgresSaver(BasePostgresSaver):
        # others are stored in blobs table
        blob_values = {}
        for k, v in checkpoint["channel_values"].items():
-            if isinstance(v, _DeltaSnapshot):
-                blob_values[k] = copy["channel_values"].pop(k)
-                copy["channel_values"][k] = True
-            elif v is None or isinstance(v, (str, int, float, bool)):
+            if v is None or isinstance(v, (str, int, float, bool)):
                pass
            else:
                blob_values[k] = copy["channel_values"].pop(k)
@@ -441,114 +430,6 @@ class PostgresSaver(BasePostgresSaver):
                with conn.cursor(binary=True, row_factory=dict_row) as cur:
                    yield cur

-    def get_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Fast-path override of `BaseCheckpointSaver.get_delta_channel_history`.
-
-        Two-stage query, both stages cover ALL requested channels:
-
-        * Stage 1 (paged): dynamic SELECT over `checkpoints` with K parallel
-          JSONB key lookups (one column pair per channel) — no subquery, no
-          aggregation. Pages newest-first by `checkpoint_id` with a cursor;
-          page size is `_DELTA_PAGE_SIZE`. Stops paging when every channel
-          has found its seed or the chain is exhausted.
-
-        * Stage 2 (per-channel UNION ALL): one branch per channel reading
-          `checkpoint_writes` filtered to that channel's specific
-          `chain_cids`, plus one branch per channel that has a seed reading
-          `checkpoint_blobs` for that channel + version. Avoids the
-          over-fetch of a single `channel = ANY(channels)` filter when
-          channels have different chain depths.
-        """
-        if not channels:
-            return {}
-        channels = list(channels)
-        thread_id = config["configurable"]["thread_id"]
-        checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
-        checkpoint_id = get_checkpoint_id(config)
-        if checkpoint_id is None:
-            target = self.get_tuple(config)
-            if target is None:
-                return {ch: {"writes": []} for ch in channels}
-            checkpoint_id = target.config["configurable"]["checkpoint_id"]
-
-        # Stage 1: paged K-JSONB-lookup scan, walking the parent chain in
-        # Python after each page. Stops as soon as every channel has its seed.
-        stage1_sql = _build_delta_stage1_sql(channels, paged=True)
-        parent_of: dict[str, str | None] = {}
-        ver_by_i_by_cid: list[dict[str, str | None]] = [{} 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}
-        walk_cursor_by_ch: dict[str, str | None] = {}
-        seeded: set[str] = set()
-        cursor: str | None = None
-
-        with self._cursor() as cur:
-            while True:
-                stage1_params: list[Any] = []
-                for ch in channels:
-                    stage1_params.extend([ch, ch])
-                stage1_params.extend(
-                    [thread_id, checkpoint_ns, cursor, cursor, _DELTA_PAGE_SIZE]
-                )
-                cur.execute(stage1_sql, stage1_params)
-                page = cur.fetchall()
-                if not page:
-                    break
-                oldest = self._ingest_stage1_page(
-                    cast("list[Mapping[str, Any]]", page),
-                    channels,
-                    parent_of,
-                    ver_by_i_by_cid,
-                    hs_by_i_by_cid,
-                )
-                self._try_advance_walks(
-                    checkpoint_id,
-                    channels,
-                    parent_of,
-                    ver_by_i_by_cid,
-                    hs_by_i_by_cid,
-                    chain_by_ch,
-                    seed_ver_by_ch,
-                    walk_cursor_by_ch,
-                    seeded,
-                )
-                # Stop if every channel is seeded, or the page was short
-                # (chain exhausted — no more rows to fetch).
-                if len(seeded) == len(channels) or len(page) < _DELTA_PAGE_SIZE:
-                    break
-                cursor = oldest
-
-        # Stage 2: per-channel UNION ALL — one writes branch per channel
-        # with non-empty chain, plus one blob branch per seeded channel.
-        channels_with_chain = [ch for ch in channels if chain_by_ch[ch]]
-        channels_with_seed = [ch for ch in channels if seed_ver_by_ch[ch] is not None]
-        stage2_sql = _build_delta_stage2_sql(
-            channels_with_chain=channels_with_chain,
-            channels_with_seed=channels_with_seed,
-        )
-
-        if stage2_sql:
-            stage2_params: list[Any] = []
-            for ch in channels_with_chain:
-                stage2_params.extend([thread_id, checkpoint_ns, ch, chain_by_ch[ch]])
-            for ch in channels_with_seed:
-                stage2_params.extend([thread_id, checkpoint_ns, ch, seed_ver_by_ch[ch]])
-            with self._cursor() as cur:
-                cur.execute(stage2_sql, stage2_params)
-                stage2_rows = cur.fetchall()
-        else:
-            stage2_rows = []
-
-        return self._build_delta_channels_writes_history(
-            channels=channels,
-            chain_by_ch=chain_by_ch,
-            seed_ver_by_ch=seed_ver_by_ch,
-            stage2_rows=cast("list[_DeltaStage2Row]", stage2_rows),
-        )
-
    def _load_checkpoint_tuple(self, value: DictRow) -> CheckpointTuple:
        """
        Convert a database row into a CheckpointTuple object.
@@ -2,9 +2,9 @@ from __future__ import annotations

 import asyncio
 from collections import defaultdict
-from collections.abc import AsyncIterator, Iterator, Mapping, Sequence
+from collections.abc import AsyncIterator, Iterator, Sequence
 from contextlib import asynccontextmanager
-from typing import Any, cast
+from typing import Any

 from langchain_core.runnables import RunnableConfig
 from langgraph.checkpoint.base import (
@@ -13,25 +13,17 @@ from langgraph.checkpoint.base import (
    Checkpoint,
    CheckpointMetadata,
    CheckpointTuple,
-    DeltaChannelHistory,
    get_checkpoint_id,
    get_serializable_checkpoint_metadata,
 )
 from langgraph.checkpoint.serde.base import SerializerProtocol
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
 from psycopg import AsyncConnection, AsyncCursor, AsyncPipeline, Capabilities
 from psycopg.rows import DictRow, dict_row
 from psycopg.types.json import Jsonb
 from psycopg_pool import AsyncConnectionPool

 from langgraph.checkpoint.postgres import _ainternal
-from langgraph.checkpoint.postgres.base import (
-    _DELTA_PAGE_SIZE,
-    BasePostgresSaver,
-    _build_delta_stage1_sql,
-    _build_delta_stage2_sql,
-    _DeltaStage2Row,
-)
+from langgraph.checkpoint.postgres.base import BasePostgresSaver
 from langgraph.checkpoint.postgres.shallow import AsyncShallowPostgresSaver

 Conn = _ainternal.Conn  # For backward compatibility
@@ -269,10 +261,7 @@ class AsyncPostgresSaver(BasePostgresSaver):
        # others are stored in blobs table
        blob_values = {}
        for k, v in checkpoint["channel_values"].items():
-            if isinstance(v, _DeltaSnapshot):
-                blob_values[k] = copy["channel_values"].pop(k)
-                copy["channel_values"][k] = True
-            elif v is None or isinstance(v, (str, int, float, bool)):
+            if v is None or isinstance(v, (str, int, float, bool)):
                pass
            else:
                blob_values[k] = copy["channel_values"].pop(k)
@@ -402,97 +391,6 @@ class AsyncPostgresSaver(BasePostgresSaver):
                async with conn.cursor(binary=True, row_factory=dict_row) as cur:
                    yield cur

-    async def aget_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Fast-path override of `BaseCheckpointSaver.aget_delta_channel_history`.
-
-        See `PostgresSaver.get_delta_channel_history` for design notes; this is
-        the async equivalent with internal stage-1 paging and per-channel
-        UNION ALL stage-2.
-        """
-        if not channels:
-            return {}
-        channels = list(channels)
-        thread_id = config["configurable"]["thread_id"]
-        checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
-        checkpoint_id = get_checkpoint_id(config)
-        if checkpoint_id is None:
-            target = await self.aget_tuple(config)
-            if target is None:
-                return {ch: {"writes": []} for ch in channels}
-            checkpoint_id = target.config["configurable"]["checkpoint_id"]
-
-        stage1_sql = _build_delta_stage1_sql(channels, paged=True)
-        parent_of: dict[str, str | None] = {}
-        ver_by_i_by_cid: list[dict[str, str | None]] = [{} 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}
-        walk_cursor_by_ch: dict[str, str | None] = {}
-        seeded: set[str] = set()
-        cursor: str | None = None
-
-        async with self._cursor() as cur:
-            while True:
-                stage1_params: list[Any] = []
-                for ch in channels:
-                    stage1_params.extend([ch, ch])
-                stage1_params.extend(
-                    [thread_id, checkpoint_ns, cursor, cursor, _DELTA_PAGE_SIZE]
-                )
-                await cur.execute(stage1_sql, stage1_params)
-                page = await cur.fetchall()
-                if not page:
-                    break
-                oldest = self._ingest_stage1_page(
-                    cast("list[Mapping[str, Any]]", page),
-                    channels,
-                    parent_of,
-                    ver_by_i_by_cid,
-                    hs_by_i_by_cid,
-                )
-                self._try_advance_walks(
-                    checkpoint_id,
-                    channels,
-                    parent_of,
-                    ver_by_i_by_cid,
-                    hs_by_i_by_cid,
-                    chain_by_ch,
-                    seed_ver_by_ch,
-                    walk_cursor_by_ch,
-                    seeded,
-                )
-                if len(seeded) == len(channels) or len(page) < _DELTA_PAGE_SIZE:
-                    break
-                cursor = oldest
-
-        channels_with_chain = [ch for ch in channels if chain_by_ch[ch]]
-        channels_with_seed = [ch for ch in channels if seed_ver_by_ch[ch] is not None]
-        stage2_sql = _build_delta_stage2_sql(
-            channels_with_chain=channels_with_chain,
-            channels_with_seed=channels_with_seed,
-        )
-
-        if stage2_sql:
-            stage2_params: list[Any] = []
-            for ch in channels_with_chain:
-                stage2_params.extend([thread_id, checkpoint_ns, ch, chain_by_ch[ch]])
-            for ch in channels_with_seed:
-                stage2_params.extend([thread_id, checkpoint_ns, ch, seed_ver_by_ch[ch]])
-            async with self._cursor() as cur:
-                await cur.execute(stage2_sql, stage2_params)
-                stage2_rows = await cur.fetchall()
-        else:
-            stage2_rows = []
-
-        return self._build_delta_channels_writes_history(
-            channels=channels,
-            chain_by_ch=chain_by_ch,
-            seed_ver_by_ch=seed_ver_by_ch,
-            stage2_rows=cast("list[_DeltaStage2Row]", stage2_rows),
-        )
-
    async def _load_checkpoint_tuple(self, value: DictRow) -> CheckpointTuple:
        """
        Convert a database row into a CheckpointTuple object.
@@ -2,26 +2,20 @@ from __future__ import annotations

 import random
 import warnings
-from collections.abc import Mapping, Sequence
+from collections.abc import Sequence
 from importlib.metadata import version as get_version
-from typing import Any, TypedDict, cast
+from typing import Any, cast

 from langchain_core.runnables import RunnableConfig
 from langgraph.checkpoint.base import (
    WRITES_IDX_MAP,
    BaseCheckpointSaver,
    ChannelVersions,
-    DeltaChannelHistory,
-    PendingWrite,
    get_checkpoint_id,
 )
 from langgraph.checkpoint.serde.types import TASKS
 from psycopg.types.json import Jsonb

-# Page size for stage-1 paged scan in `get_delta_channel_history`. Internal
-# constant — exposing this as a kwarg is left as a follow-up.
-_DELTA_PAGE_SIZE = 1024
-
 MetadataInput = dict[str, Any] | None

 try:
@@ -159,141 +153,6 @@ INSERT_CHECKPOINT_WRITES_SQL = """
 """


-class _DeltaStage2Row(TypedDict, total=False):
-    """One row from `_build_delta_stage2_sql` (a UNION ALL of writes and blobs)."""
-
-    _kind: str  # "w" or "b"
-    checkpoint_id: str | None  # "w" rows only
-    channel: str | None  # set on both "w" and "b" rows
-    type: str | None
-    blob: bytes | None
-    task_id: str | None  # "w" rows only
-    idx: int | None  # "w" rows only
-    version: str | None  # "b" rows only
-
-
-# Multi-channel two-stage DeltaChannel reconstruction.
-#
-# Stage 1 scans checkpoint metadata (no blob bytes) and emits one row per
-# checkpoint with K parallel JSONB key lookups (one column pair per
-# requested delta channel: ver_i / hs_i).  No subqueries, no aggregation.
-# Python walks the parent chain once across all channels.
-#
-# Stage 2 fetches all writes and the seed blobs for ALL channels in a
-# single roundtrip via `channel = ANY(%s)` and chain/seed-version
-# filtering.
-#
-# Empirical comparison vs an alternative "ship full channel_versions /
-# channel_values JSONB and let Python pick" form (1000 checkpoints,
-# 8 total channels in graph, 3 delta channels requested):
-#
-#   Postgres execution:    A=0.24ms vs B=0.38ms   (both negligible)
-#   End-to-end latency:    A=6.83ms vs B=2.28ms   (B is 3.0x faster)
-#   Wire payload:          A=836KB  vs B=330KB    (61% smaller)
-#   Buffer hits:           identical (167 blocks)
-#
-# B (this dynamic-columns design) wins because it avoids JSONB
-# serialization on the wire and JSONB-to-dict deserialization in
-# psycopg.  Even at K=8 (8 delta channels = 16 dynamic columns), B
-# still beats A end-to-end (4.2ms vs 6.8ms).
-
-
-def _build_delta_stage1_sql(channels: Sequence[str], *, paged: bool) -> str:
-    """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,
-               (checkpoint -> 'channel_values' -> %s) IS NOT NULL AS hs_0,
-               checkpoint -> 'channel_versions' ->> %s AS ver_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
-
-    Channel names are passed as `%s` parameters (safe from SQL injection).
-    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, 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.
-    """
-    cols = []
-    for i in range(len(channels)):
-        cols.append(
-            f"checkpoint -> 'channel_versions' ->> %s AS ver_{i}, "
-            f"(checkpoint -> 'channel_values' -> %s) IS NOT NULL AS hs_{i}"
-        )
-    sql = (
-        "SELECT checkpoint_id, parent_checkpoint_id, "
-        + ", ".join(cols)
-        + " FROM checkpoints WHERE thread_id = %s AND checkpoint_ns = %s"
-    )
-    if paged:
-        sql += (
-            " AND (%s::text IS NULL OR checkpoint_id < %s)"
-            " ORDER BY checkpoint_id DESC LIMIT %s"
-        )
-    return sql
-
-
-def _build_delta_stage2_sql(
-    *,
-    channels_with_chain: Sequence[str],
-    channels_with_seed: Sequence[str],
-) -> str:
-    """Build stage 2 SQL as a per-channel UNION ALL.
-
-    For each channel with a non-empty chain, emit one branch reading
-    `checkpoint_writes` for that specific channel + chain_cids. For each
-    channel with a seed_version, emit one branch reading `checkpoint_blobs`
-    for that channel + version. This avoids the over-fetch of the prior
-    `channel = ANY(channels) AND checkpoint_id = ANY(union)` form when
-    channels have different chain depths.
-
-    The caller must pass parameters in matching order:
-
-        for ch in channels_with_chain:
-            params += [thread_id, checkpoint_ns, ch, chain_cids[ch]]
-        for ch in channels_with_seed:
-            params += [thread_id, checkpoint_ns, ch, seed_version[ch]]
-
-    Returns an empty SQL string if both channel lists are empty (caller
-    must skip executing in that case).
-    """
-    branches: list[str] = []
-    for _ in channels_with_chain:
-        branches.append(
-            "SELECT 'w'::text AS _kind, "
-            "checkpoint_id, channel, "
-            "type, blob, task_id, idx, NULL::text AS version "
-            "FROM checkpoint_writes "
-            "WHERE thread_id = %s AND checkpoint_ns = %s AND channel = %s "
-            "AND checkpoint_id = ANY(%s)"
-        )
-    for _ in channels_with_seed:
-        branches.append(
-            "SELECT 'b'::text, NULL, channel, "
-            "type, blob, NULL, NULL, version "
-            "FROM checkpoint_blobs "
-            "WHERE thread_id = %s AND checkpoint_ns = %s AND channel = %s "
-            "AND version = %s"
-        )
-    return " UNION ALL ".join(branches)
-
-
-# Stage 1 rows are dynamic-shape dicts: {checkpoint_id, parent_checkpoint_id,
-# ver_0, hs_0, ver_1, hs_1, ...}.  Walking is parameterized by the channel
-# list to map indices back to channel names — no static TypedDict here.
-# `dict[str, Any]` is the practical signature.
-
-
 class BasePostgresSaver(BaseCheckpointSaver[str]):
    SELECT_SQL = SELECT_SQL
    SELECT_PENDING_SENDS_SQL = SELECT_PENDING_SENDS_SQL
@@ -336,146 +195,6 @@ class BasePostgresSaver(BaseCheckpointSaver[str]):
            if t.decode() != "empty"
        }

-    @staticmethod
-    def _ingest_stage1_page(
-        stage1_rows: Sequence[Mapping[str, Any]],
-        channels: Sequence[str],
-        parent_of: dict[str, str | None],
-        ver_by_i_by_cid: list[dict[str, str | None]],
-        hs_by_i_by_cid: list[dict[str, bool]],
-    ) -> str | None:
-        """Fold one stage-1 page into the running walk-state mappings.
-
-        Returns the oldest checkpoint_id seen on this page (smallest, since
-        pages come back DESC). Caller uses it as the cursor for the next
-        page (`AND checkpoint_id < cursor`).
-        """
-        oldest: str | None = None
-        for r in stage1_rows:
-            cid = cast(str, r["checkpoint_id"])
-            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}"))
-                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
-
-    @staticmethod
-    def _try_advance_walks(
-        target_id: str,
-        channels: Sequence[str],
-        parent_of: Mapping[str, str | None],
-        ver_by_i_by_cid: Sequence[Mapping[str, str | None]],
-        hs_by_i_by_cid: Sequence[Mapping[str, bool]],
-        chain_by_ch: dict[str, list[str]],
-        seed_ver_by_ch: dict[str, str | None],
-        walk_cursor_by_ch: dict[str, str | None],
-        seeded: set[str],
-    ) -> None:
-        """Advance each not-yet-seeded channel's walk as far as possible.
-
-        Uses the partial `parent_of` map accumulated so far. A walk stops
-        either because:
-          (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`, `walk_cursor_by_ch`, and
-        `seeded` in place.
-        """
-        for i, ch in enumerate(channels):
-            if ch in seeded:
-                continue
-            # First-time entry: cursor starts at the target's parent.
-            if ch not in walk_cursor_by_ch:
-                walk_cursor_by_ch[ch] = parent_of.get(target_id)
-            cur_cid = walk_cursor_by_ch[ch]
-            ch_chain = chain_by_ch[ch]
-            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)
-                if hs_i.get(cur_cid, False):
-                    seed_ver_by_ch[ch] = ver_i.get(cur_cid)
-                    seeded.add(ch)
-                    cur_cid = None
-                    break
-                cur_cid = parent_of[cur_cid]
-            walk_cursor_by_ch[ch] = cur_cid
-
-    def _build_delta_channels_writes_history(
-        self,
-        *,
-        channels: Sequence[str],
-        chain_by_ch: Mapping[str, list[str]],
-        seed_ver_by_ch: Mapping[str, str | None],
-        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. 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]]]] = {
-            ch: {} for ch in channels
-        }
-        # seed_blob_by_ver[(channel, version)] = (type, blob)
-        seed_blob_by_ver: dict[tuple[str, str], tuple[str, bytes]] = {}
-
-        for r in stage2_rows:
-            ch = cast(str, r["channel"])
-            kind = r["_kind"]
-            if kind == "w":
-                cid = cast(str, r["checkpoint_id"])
-                writes_by_ch_by_cid.setdefault(ch, {}).setdefault(cid, []).append(
-                    cast(
-                        "tuple[str, bytes, str, int]",
-                        (r["type"], r["blob"], r["task_id"], r["idx"]),
-                    )
-                )
-            else:  # kind == "b"
-                ver = cast(str, r["version"])
-                seed_blob_by_ver[(ch, ver)] = cast(
-                    "tuple[str, bytes]", (r["type"], r["blob"])
-                )
-
-        # Sort writes per (channel, cid) newest-first by (task_id, idx)
-        for cid_map in writes_by_ch_by_cid.values():
-            for ws in cid_map.values():
-                ws.sort(key=lambda w: (w[2], w[3]), reverse=True)
-
-        result: dict[str, DeltaChannelHistory] = {}
-        for ch in channels:
-            chain_cids = chain_by_ch.get(ch, [])
-            seed_version = seed_ver_by_ch.get(ch)
-
-            collected: list[PendingWrite] = []
-            cid_writes = writes_by_ch_by_cid.get(ch, {})
-            for cid in chain_cids:
-                for type_tag, write_blob, task_id, _idx in cid_writes.get(cid, []):
-                    val = self.serde.loads_typed((type_tag, write_blob))
-                    collected.append((task_id, ch, val))
-            collected.reverse()
-
-            entry: DeltaChannelHistory = {"writes": collected}
-            if seed_version is not None:
-                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)
-            result[ch] = entry
-        return result
-
    def _dump_blobs(
        self,
        thread_id: str,
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"

 [project]
 name = "langgraph-checkpoint-postgres"
-version = "3.1.0a4"
+version = "3.0.5"
 description = "Library with a Postgres implementation of LangGraph checkpoint saver."
 authors = []
 requires-python = ">=3.10"
@@ -12,7 +12,7 @@ readme = "README.md"
 license = "MIT"
 license-files = ['LICENSE']
 dependencies = [
-  "langgraph-checkpoint>=4.1.0a4,<5.0.0",
+  "langgraph-checkpoint>=2.1.2,<5.0.0",
  "orjson>=3.11.5",
  "psycopg>=3.2.0",
  "psycopg-pool>=3.2.0",
@@ -20,7 +20,7 @@ dependencies = [

 [project.urls]
 Source = "https://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint-postgres"
-Twitter = "https://x.com/langchain_oss"
+Twitter = "https://x.com/LangChain"
 Slack = "https://www.langchain.com/join-community"
 Reddit = "https://www.reddit.com/r/LangChain/"

@@ -361,9 +361,9 @@ async def test_get_checkpoint_no_channel_values(

        load_checkpoint_tuple = saver._load_checkpoint_tuple

-        async def patched_load_checkpoint_tuple(value):
+        def patched_load_checkpoint_tuple(value):
            value["checkpoint"].pop("channel_values", None)
-            return await load_checkpoint_tuple(value)
+            return load_checkpoint_tuple(value)

        monkeypatch.setattr(
            saver, "_load_checkpoint_tuple", patched_load_checkpoint_tuple
@@ -371,47 +371,3 @@ async def test_get_checkpoint_no_channel_values(

        checkpoint = await saver.aget_tuple(config)
        assert checkpoint.checkpoint["channel_values"] == {}
-
-
-@pytest.mark.parametrize("saver_name", ["base", "pool", "pipe"])
-async def test_delta_channel_chain_reconstruction(saver_name: str) -> None:
-    """AsyncPostgresSaver reconstructs DeltaChannel chain via point-lookup traversal."""
-    pytest.importorskip(
-        "langgraph.channels.delta", reason="langgraph core not installed"
-    )
-
-    from typing import Annotated
-
-    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)]
-
-    def respond(state: State) -> dict:
-        n = len(state["messages"])
-        return {"messages": [AIMessage(content=f"reply-{n}", id=f"ai-{n}")]}
-
-    builder = StateGraph(State)
-    builder.add_node("respond", respond)
-    builder.add_edge(START, "respond")
-
-    async with _saver(saver_name) as saver:
-        graph = builder.compile(checkpointer=saver)
-        config = {"configurable": {"thread_id": "diff-channel-test-1"}}
-
-        await graph.ainvoke({"messages": [HumanMessage(content="hi", id="h1")]}, config)
-        await graph.ainvoke(
-            {"messages": [HumanMessage(content="there", id="h2")]}, config
-        )
-
-        state = await graph.aget_state(config)
-        msgs = state.values["messages"]
-        assert len(msgs) == 4, f"expected 4, got {len(msgs)}: {msgs}"
-        assert msgs[0].content == "hi"
-        assert msgs[1].content == "reply-1"
-        assert msgs[2].content == "there"
-        assert msgs[3].content == "reply-3"
@@ -1,10 +1,6 @@
 version = 1
 revision = 3
 requires-python = ">=3.10"
-resolution-markers = [
-    "python_full_version >= '3.15'",
-    "python_full_version < '3.15'",
-]

 [[package]]
 name = "annotated-types"
@@ -244,11 +240,10 @@ wheels = [

 [[package]]
 name = "langchain-core"
-version = "1.3.2"
+version = "1.2.22"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "jsonpatch" },
-    { name = "langchain-protocol" },
    { name = "langsmith" },
    { name = "packaging" },
    { name = "pydantic" },
@@ -257,26 +252,14 @@ dependencies = [
    { name = "typing-extensions" },
    { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/a8/03/7219502e8ca728d65eb44d7a3eb60239230742a70dbfc9241b9bfd61c4ab/langchain_core-1.3.2.tar.gz", hash = "sha256:fd7a50b2f28ba561fd9d7f5d2760bc9e06cf00cdf820a3ccafe88a94ffa8d5b7", size = 911813, upload-time = "2026-04-24T15:49:23.699Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/b1/a3/c4cd6827a1df46c821e7214b7f7b7a28b189e6c9b84ef15c6d629c5e3179/langchain_core-1.2.22.tar.gz", hash = "sha256:8d8f726d03d3652d403da915126626bb6250747e8ba406537d849e68b9f5d058", size = 842487, upload-time = "2026-03-24T18:48:44.9Z" }
 wheels = [
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-]
-
-[[package]]
-name = "langchain-protocol"
-version = "0.0.15"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "typing-extensions" },
-]
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-wheels = [
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+    { url = "https://files.pythonhosted.org/packages/c7/a6/2ffacf0f1a3788f250e75d0b52a24896c413be11be3a6d42bcdf46fbea48/langchain_core-1.2.22-py3-none-any.whl", hash = "sha256:7e30d586b75918e828833b9ec1efc25465723566845dd652c277baf751e9c04b", size = 506829, upload-time = "2026-03-24T18:48:43.286Z" },
 ]

 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.0a4"
+version = "4.0.1"
 source = { editable = "../checkpoint" }
 dependencies = [
    { name = "langchain-core" },
@@ -324,7 +307,7 @@ test = [

 [[package]]
 name = "langgraph-checkpoint-postgres"
-version = "3.1.0a4"
+version = "3.0.5"
 source = { editable = "." }
 dependencies = [
    { name = "langgraph-checkpoint" },
@@ -399,7 +382,7 @@ test = [

 [[package]]
 name = "langsmith"
-version = "0.7.31"
+version = "0.6.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "httpx" },
@@ -409,12 +392,11 @@ dependencies = [
    { name = "requests" },
    { name = "requests-toolbelt" },
    { name = "uuid-utils" },
-    { name = "xxhash" },
    { name = "zstandard" },
 ]
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+version = "1.20.0"
 source = { registry = "https://pypi.org/simple" }
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-
 [[package]]
 name = "zstandard"
 version = "0.25.0"
@@ -2,11 +2,6 @@

 Implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via `aiosqlite`)

-## Security
-
-> [!IMPORTANT]
-> Set `LANGGRAPH_STRICT_MSGPACK=true` or pass an explicit `allowed_msgpack_modules` list when creating your checkpointer. This restricts checkpoint deserialization to known-safe types, preventing code execution if the database is compromised. See the [langgraph-checkpoint README](https://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint#serde) for details.
-
 ## Usage

 ```python
@@ -4,7 +4,7 @@ import json
 import random
 import sqlite3
 import threading
-from collections.abc import AsyncIterator, Iterator, Mapping, Sequence
+from collections.abc import AsyncIterator, Iterator, Sequence
 from contextlib import closing, contextmanager
 from typing import Any, cast

@@ -16,19 +16,12 @@ from langgraph.checkpoint.base import (
    Checkpoint,
    CheckpointMetadata,
    CheckpointTuple,
-    DeltaChannelHistory,
    SerializerProtocol,
    get_checkpoint_id,
    get_checkpoint_metadata,
 )
 from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer

-from langgraph.checkpoint.sqlite._delta import (
-    DELTA_STAGE1_SQL,
-    build_delta_channels_writes_history,
-    build_delta_stage2_sql,
-    step_walk_with_row,
-)
 from langgraph.checkpoint.sqlite.utils import search_where

 _AIO_ERROR_MSG = (
@@ -500,88 +493,6 @@ class SqliteSaver(BaseCheckpointSaver[str]):
                (str(thread_id),),
            )

-    def get_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Fast-path override of `BaseCheckpointSaver.get_delta_channel_history`.
-
-        Two-stage query:
-
-        * Stage 1 (paged): newest-first slice of `checkpoints` returning
-          `(checkpoint_id, parent_checkpoint_id, type, checkpoint)` per
-          ancestor. Sqlite has no JSONB, so we ship the full serialized
-          checkpoint blob and inspect `channel_values` in Python. Pages
-          newest-first by `checkpoint_id` with a `< cursor` predicate;
-          page size is `DELTA_PAGE_SIZE`. Stops paging when every channel
-          has found its seed or the chain is exhausted.
-
-        * Stage 2 (per-channel UNION ALL): one branch per channel reading
-          `writes` filtered to that channel's specific `chain_cids`. No
-          separate seed-blob fetch — sqlite stores `channel_values` inline
-          in the checkpoint blob, so seeds come back from stage 1.
-        """
-        if not channels:
-            return {}
-        channels = list(channels)
-        thread_id = str(config["configurable"]["thread_id"])
-        checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
-        checkpoint_id = get_checkpoint_id(config)
-        if checkpoint_id is None:
-            target = self.get_tuple(config)
-            if target is None:
-                return {ch: {"writes": []} for ch in channels}
-            checkpoint_id = target.config["configurable"]["checkpoint_id"]
-
-        chain_by_ch: dict[str, list[str]] = {ch: [] for ch in channels}
-        seed_val_by_ch: dict[str, Any] = {}
-        walk_state: dict[str, Any] = {}
-        seeded: set[str] = set()
-
-        with self.cursor(transaction=False) as cur:
-            cur.execute(DELTA_STAGE1_SQL, (thread_id, checkpoint_ns, checkpoint_id))
-            for row in cur:
-                cid, parent_cid, type_tag, blob = row
-                if step_walk_with_row(
-                    cid=cid,
-                    parent_cid=parent_cid,
-                    type_tag=type_tag,
-                    blob=blob,
-                    target_id=checkpoint_id,
-                    serde=self.serde,
-                    chain_by_ch=chain_by_ch,
-                    seed_val_by_ch=seed_val_by_ch,
-                    walk_state=walk_state,
-                    seeded=seeded,
-                    channels=channels,
-                ):
-                    break
-
-            channels_with_chain = [ch for ch in channels if chain_by_ch[ch]]
-            stage2_sql = build_delta_stage2_sql(
-                chain_lens=[len(chain_by_ch[ch]) for ch in channels_with_chain],
-            )
-            if stage2_sql:
-                stage2_params: list[Any] = []
-                for ch in channels_with_chain:
-                    stage2_params.extend(
-                        [thread_id, checkpoint_ns, ch, *chain_by_ch[ch]]
-                    )
-                cur.execute(stage2_sql, stage2_params)
-                stage2_rows = cast(
-                    "list[tuple[str, str, str, int, str, bytes]]", cur.fetchall()
-                )
-            else:
-                stage2_rows = []
-
-        return build_delta_channels_writes_history(
-            channels=channels,
-            chain_by_ch=chain_by_ch,
-            seed_val_by_ch=seed_val_by_ch,
-            seeded=seeded,
-            stage2_rows=stage2_rows,
-            serde=self.serde,
-        )
-
    async def aget_tuple(self, config: RunnableConfig) -> CheckpointTuple | None:
        """Get a checkpoint tuple from the database asynchronously.

@@ -1,172 +0,0 @@
-"""Shared helpers for `get_delta_channel_history` on sqlite savers.
-
-Mirrors the two-stage shape of `BasePostgresSaver` (ancestor walk +
-per-channel UNION ALL writes fetch), but adapted for sqlite's
-constraints. The structural differences:
-
-* No JSONB — to inspect `channel_values` for a checkpoint we must
-  deserialize the full blob. Stage 1 streams the cursor row-by-row and
-  deserializes only the rows the merged walk visits, freeing each blob
-  before advancing.
-* No separate blob table — `channel_values` lives inline in the
-  checkpoint, so seeds come back from stage 1 with no second fetch.
-* Single merged walk (not K independent walks): each visited cid is
-  deserialized exactly once, regardless of how many channels are still
-  seeking their seed.
-
-The streaming design keeps peak in-flight memory at roughly one
-deserialized checkpoint at a time, instead of holding the entire
-ancestor chain's worth of raw blobs as a `fetchall()`-materialized list.
-"""
-
-from __future__ import annotations
-
-from collections.abc import Mapping, Sequence
-from typing import Any
-
-from langgraph.checkpoint.base import DeltaChannelHistory, PendingWrite
-
-# Stage 1 streams ancestors of `target_cid` newest-first. The `<=`
-# predicate keeps target itself in the stream so we can read its
-# `parent_checkpoint_id` from the first row without a separate lookup;
-# the caller skips target's own writes/seed (matches the
-# `BaseCheckpointSaver` contract).
-DELTA_STAGE1_SQL = (
-    "SELECT checkpoint_id, parent_checkpoint_id, type, checkpoint "
-    "FROM checkpoints "
-    "WHERE thread_id = ? AND checkpoint_ns = ? AND checkpoint_id <= ? "
-    "ORDER BY checkpoint_id DESC"
-)
-
-
-def build_delta_stage2_sql(*, chain_lens: Sequence[int]) -> str:
-    """Stage-2 per-channel UNION ALL fetching writes from `writes`.
-
-    One branch per channel with a non-empty chain. Each branch inlines its
-    own `IN (?, ?, ...)` placeholder list because sqlite has no array-bind
-    equivalent of postgres's `= ANY(%s)`. Caller passes parameters in
-    matching order: `[thread_id, checkpoint_ns, channel, *chain_cids]` per
-    branch.
-
-    Returns an empty string when no channel has a chain (caller skips
-    executing in that case). Per-channel UNION ALL avoids the over-fetch
-    of a single `channel = ANY(channels)` filter when channels have
-    different chain depths — same rationale as postgres.
-    """
-    branches: list[str] = []
-    for n in chain_lens:
-        cid_placeholders = ",".join("?" * n)
-        branches.append(
-            "SELECT checkpoint_id, channel, task_id, idx, type, value "
-            "FROM writes "
-            "WHERE thread_id = ? AND checkpoint_ns = ? AND channel = ? "
-            f"AND checkpoint_id IN ({cid_placeholders})"
-        )
-    return " UNION ALL ".join(branches)
-
-
-def step_walk_with_row(
-    *,
-    cid: str,
-    parent_cid: str | None,
-    type_tag: str,
-    blob: bytes,
-    target_id: str,
-    serde: Any,
-    chain_by_ch: dict[str, list[str]],
-    seed_val_by_ch: dict[str, Any],
-    walk_state: dict[str, Any],
-    seeded: set[str],
-    channels: Sequence[str],
-) -> bool:
-    """Process one streamed stage-1 row in the merged ancestor walk.
-
-    The cursor returns (cid, parent_cid, type, blob) rows in
-    `checkpoint_id` DESC order starting at target. The first row is
-    target itself; we read its parent_cid to seed the walk and otherwise
-    skip it (target's own writes/seed are not part of the contract).
-
-    For each subsequent row, if `cid` matches the walk's current
-    position, we deserialize the blob, append the cid to every
-    not-yet-seeded channel's chain, and check `channel_values` for
-    seeds. The deserialized checkpoint is dropped before advancing — no
-    cross-row cache, so peak in-flight is one deserialized checkpoint.
-
-    Off-path rows (different branch on the same thread) advance the
-    cursor without doing any work.
-
-    Returns True when every requested channel is seeded — the caller
-    can stop iterating and close the cursor.
-    """
-    if "started" not in walk_state:
-        if cid == target_id:
-            walk_state["started"] = True
-            walk_state["cur_cid"] = parent_cid
-            walk_state["active"] = {ch for ch in channels if ch not in seeded}
-        # Not target yet (or target not present): keep streaming.
-        return False
-    active: set[str] = walk_state["active"]
-    if not active:
-        return True
-    if cid != walk_state["cur_cid"]:
-        # Off-path row from a sibling branch — skip without deserializing.
-        return False
-    for ch in active:
-        chain_by_ch[ch].append(cid)
-    ckpt = serde.loads_typed((type_tag, blob))
-    channel_values: Mapping[str, Any] = ckpt.get("channel_values") or {}
-    for ch in [ch for ch in active if ch in channel_values]:
-        seed_val_by_ch[ch] = channel_values[ch]
-        seeded.add(ch)
-        active.discard(ch)
-    del ckpt, channel_values
-    walk_state["cur_cid"] = parent_cid
-    return not active
-
-
-def build_delta_channels_writes_history(
-    *,
-    channels: Sequence[str],
-    chain_by_ch: Mapping[str, list[str]],
-    seed_val_by_ch: Mapping[str, Any],
-    seeded: set[str],
-    stage2_rows: Sequence[tuple[str, str, str, int, str, bytes]],
-    serde: Any,
-) -> dict[str, DeltaChannelHistory]:
-    """Demux stage-2 rows per channel; produce per-channel histories.
-
-    Stage-2 rows are `(checkpoint_id, channel, task_id, idx, type, value)`.
-    Final write order is oldest→newest globally and `(task_id, idx)` within
-    a checkpoint, matching the contract on `DeltaChannelHistory.writes`.
-
-    `seed` is omitted when the walk reached a true root with no snapshot
-    found (channel never entered `seeded`); consumers treat absence as
-    "start empty".
-    """
-    writes_by_ch_by_cid: dict[str, dict[str, list[tuple[str, bytes, str, int]]]] = {
-        ch: {} for ch in channels
-    }
-    for cid, ch, task_id, idx, type_tag, value_blob in stage2_rows:
-        writes_by_ch_by_cid.setdefault(ch, {}).setdefault(cid, []).append(
-            (type_tag, value_blob, task_id, idx)
-        )
-    for cid_map in writes_by_ch_by_cid.values():
-        for ws in cid_map.values():
-            ws.sort(key=lambda w: (w[2], w[3]))
-
-    result: dict[str, DeltaChannelHistory] = {}
-    for ch in channels:
-        chain_cids = chain_by_ch.get(ch, [])
-        cid_writes = writes_by_ch_by_cid.get(ch, {})
-        collected: list[PendingWrite] = []
-        # Chain is newest-first; iterate oldest-first for the public order.
-        for cid in reversed(chain_cids):
-            for type_tag, value_blob, task_id, _idx in cid_writes.get(cid, []):
-                collected.append(
-                    (task_id, ch, serde.loads_typed((type_tag, value_blob)))
-                )
-        entry: DeltaChannelHistory = {"writes": collected}
-        if ch in seeded:
-            entry["seed"] = seed_val_by_ch[ch]
-        result[ch] = entry
-    return result
@@ -4,7 +4,7 @@ import asyncio
 import json
 import random
 import threading
-from collections.abc import AsyncIterator, Callable, Iterator, Mapping, Sequence
+from collections.abc import AsyncIterator, Callable, Iterator, Sequence
 from contextlib import asynccontextmanager
 from typing import Any, TypeVar, cast

@@ -17,19 +17,12 @@ from langgraph.checkpoint.base import (
    Checkpoint,
    CheckpointMetadata,
    CheckpointTuple,
-    DeltaChannelHistory,
    SerializerProtocol,
    get_checkpoint_id,
    get_checkpoint_metadata,
 )
 from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer

-from langgraph.checkpoint.sqlite._delta import (
-    DELTA_STAGE1_SQL,
-    build_delta_channels_writes_history,
-    build_delta_stage2_sql,
-    step_walk_with_row,
-)
 from langgraph.checkpoint.sqlite.utils import search_where

 T = TypeVar("T", bound=Callable)
@@ -279,29 +272,6 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
            self.adelete_thread(thread_id), self.loop
        ).result()

-    def get_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Sync bridge to `aget_delta_channel_history`.
-
-        Mirrors the same cross-thread guard as `get_tuple` /
-        `delete_thread` — calling from the loop thread raises rather than
-        deadlocking.
-        """
-        try:
-            if asyncio.get_running_loop() is self.loop:
-                raise asyncio.InvalidStateError(
-                    "Synchronous calls to AsyncSqliteSaver are only allowed from a "
-                    "different thread. From the main thread, use the async interface. "
-                    "For example, use `await checkpointer.aget_delta_channel_history(...)`."
-                )
-        except RuntimeError:
-            pass
-        return asyncio.run_coroutine_threadsafe(
-            self.aget_delta_channel_history(config=config, channels=channels),
-            self.loop,
-        ).result()
-
    async def setup(self) -> None:
        """Set up the checkpoint database asynchronously.

@@ -619,83 +589,6 @@ class AsyncSqliteSaver(BaseCheckpointSaver[str]):
            )
            await self.conn.commit()

-    async def aget_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Fast-path override of `BaseCheckpointSaver.aget_delta_channel_history`.
-
-        See `SqliteSaver.get_delta_channel_history` for design notes; this
-        is the async equivalent using `aiosqlite` cursors. Stage 1 pages
-        the parent chain newest-first and Python-deserializes each
-        checkpoint blob to find per-channel snapshots; stage 2 fetches
-        only the relevant writes via per-channel UNION ALL.
-        """
-        if not channels:
-            return {}
-        channels = list(channels)
-        await self.setup()
-        thread_id = str(config["configurable"]["thread_id"])
-        checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
-        checkpoint_id = get_checkpoint_id(config)
-        if checkpoint_id is None:
-            target = await self.aget_tuple(config)
-            if target is None:
-                return {ch: {"writes": []} for ch in channels}
-            checkpoint_id = target.config["configurable"]["checkpoint_id"]
-
-        chain_by_ch: dict[str, list[str]] = {ch: [] for ch in channels}
-        seed_val_by_ch: dict[str, Any] = {}
-        walk_state: dict[str, Any] = {}
-        seeded: set[str] = set()
-
-        async with self.lock, self.conn.cursor() as cur:
-            await cur.execute(
-                DELTA_STAGE1_SQL, (thread_id, checkpoint_ns, checkpoint_id)
-            )
-            async for row in cur:
-                cid, parent_cid, type_tag, blob = row
-                if step_walk_with_row(
-                    cid=cid,
-                    parent_cid=parent_cid,
-                    type_tag=type_tag,
-                    blob=blob,
-                    target_id=checkpoint_id,
-                    serde=self.serde,
-                    chain_by_ch=chain_by_ch,
-                    seed_val_by_ch=seed_val_by_ch,
-                    walk_state=walk_state,
-                    seeded=seeded,
-                    channels=channels,
-                ):
-                    break
-
-            channels_with_chain = [ch for ch in channels if chain_by_ch[ch]]
-            stage2_sql = build_delta_stage2_sql(
-                chain_lens=[len(chain_by_ch[ch]) for ch in channels_with_chain],
-            )
-            if stage2_sql:
-                stage2_params: list[Any] = []
-                for ch in channels_with_chain:
-                    stage2_params.extend(
-                        [thread_id, checkpoint_ns, ch, *chain_by_ch[ch]]
-                    )
-                await cur.execute(stage2_sql, stage2_params)
-                stage2_rows = cast(
-                    "list[tuple[str, str, str, int, str, bytes]]",
-                    await cur.fetchall(),
-                )
-            else:
-                stage2_rows = []
-
-        return build_delta_channels_writes_history(
-            channels=channels,
-            chain_by_ch=chain_by_ch,
-            seed_val_by_ch=seed_val_by_ch,
-            seeded=seeded,
-            stage2_rows=stage2_rows,
-            serde=self.serde,
-        )
-
    def get_next_version(self, current: str | None, channel: None) -> str:
        """Generate the next version ID for a channel.

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"

 [project]
 name = "langgraph-checkpoint-sqlite"
-version = "3.1.0a1"
+version = "3.0.3"
 description = "Library with a SQLite implementation of LangGraph checkpoint saver."
 authors = []
 requires-python = ">=3.10"
@@ -12,14 +12,14 @@ readme = "README.md"
 license = "MIT"
 license-files = ['LICENSE']
 dependencies = [
-    "langgraph-checkpoint>=4.1.0a4,<5.0.0",
+    "langgraph-checkpoint>=3,<5.0.0",
    "aiosqlite>=0.20",
    "sqlite-vec>=0.1.6",
 ]

 [project.urls]
 Source = "https://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint-sqlite"
-Twitter = "https://x.com/langchain_oss"
+Twitter = "https://x.com/LangChain"
 Slack = "https://www.langchain.com/join-community"
 Reddit = "https://www.reddit.com/r/LangChain/"

@@ -1,170 +0,0 @@
-"""Sqlite-specific migration smoke tests: BinaryOperatorAggregate -> DeltaChannel.
-
-Mirrors `libs/langgraph/tests/test_delta_channel_migration.py` (which
-covers `InMemorySaver` + a third-party fallback to the base default
-impl). This file exercises the same migration scenario through the
-sqlite-specific `SqliteSaver.get_delta_channel_history` override —
-specifically that the streaming ancestor walk finds a pre-migration
-plain `channel_values[ch]` entry and surfaces it as the `seed`, with
-post-migration writes folding on top through the reducer.
-
-Pre-migration checkpoints under `BinaryOperatorAggregate` carry the
-full accumulated value at every settled super-step boundary. The
-override has to identify those as "real" seeds (not `_DeltaSnapshot`
-sentinels) — the saver layer is intentionally delta-agnostic and just
-returns whatever is stored in `channel_values[ch]`.
-"""
-
-from __future__ import annotations
-
-import operator
-from typing import Annotated, Any
-
-import pytest
-from langchain_core.runnables import RunnableConfig
-
-# `langgraph` core isn't a dep of `langgraph-checkpoint-sqlite`. Skip the
-# whole module rather than importerror-ing in the standalone CI shape.
-pytest.importorskip("langgraph.channels.delta", reason="langgraph core not installed")
-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: 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  # noqa: E402
-from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver  # noqa: E402
-
-pytestmark = pytest.mark.anyio
-
-
-def _noop(_state: Any) -> dict:
-    return {}
-
-
-def _list_concat(state: list, writes: list) -> list:
-    result = list(state)
-    for w in writes:
-        result.extend(w if isinstance(w, list) else [w])
-    return result
-
-
-def _binop_graph(checkpointer: Any) -> Any:
-    class BinopState(TypedDict):
-        items: Annotated[list, BinaryOperatorAggregate(list, operator.add)]
-
-    return (
-        StateGraph(BinopState)
-        .add_node("noop", _noop)
-        .add_edge(START, "noop")
-        .add_edge("noop", END)
-        .compile(checkpointer=checkpointer)
-    )
-
-
-def _delta_graph(checkpointer: Any) -> Any:
-    class DeltaState(TypedDict):
-        items: Annotated[list, DeltaChannel(_list_concat)]
-
-    return (
-        StateGraph(DeltaState)
-        .add_node("noop", _noop)
-        .add_edge(START, "noop")
-        .add_edge("noop", END)
-        .compile(checkpointer=checkpointer)
-    )
-
-
-def _drive(graph: Any, config: RunnableConfig, tag: str, n: int) -> None:
-    for i in range(n):
-        graph.invoke({"items": [f"{tag}{i}"]}, config)
-
-
-async def _adrive(graph: Any, config: RunnableConfig, tag: str, n: int) -> None:
-    for i in range(n):
-        await graph.ainvoke({"items": [f"{tag}{i}"]}, config)
-
-
-def _settled_boundaries(history: list) -> list[tuple[RunnableConfig, list]]:
-    """`(config, items)` for every checkpoint with `next == ('__start__',)`
-    — the stable inter-invoke boundaries that round-trip predictably.
-    """
-    return [
-        (s.config, list(s.values.get("items", [])))
-        for s in history
-        if s.next == ("__start__",)
-    ]
-
-
-def test_migration_preserves_pre_migration_state_sync() -> None:
-    """Drive 3 invokes under `BinaryOperatorAggregate`, swap the
-    annotation to `DeltaChannel` on the same sqlite-backed thread, and
-    verify every settled pre-migration boundary round-trips exactly.
-
-    The override's streaming walk must identify the plain accumulated
-    list at each pre-migration ancestor as a valid `seed` even though
-    no `_DeltaSnapshot` was ever written there.
-    """
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "mig-sync"}}
-
-        binop = _binop_graph(saver)
-        _drive(binop, config, "u", 3)
-
-        pre_boundaries = _settled_boundaries(list(binop.get_state_history(config)))
-        assert len(pre_boundaries) >= 2, "expected multiple settled boundaries"
-
-        delta = _delta_graph(saver)
-        for cfg, items in pre_boundaries:
-            snap = delta.get_state(cfg)
-            assert list(snap.values.get("items", [])) == items, (
-                f"snapshot mismatch at {cfg['configurable']['checkpoint_id']}: "
-                f"expected {items}, got {snap.values.get('items', [])}"
-            )
-
-
-def test_migration_continued_thread_folds_deltas_on_seed_sync() -> None:
-    """After migration, driving one more super-step extends the
-    pre-migration accumulated state via the delta reducer — the seed
-    plus a single new write.
-    """
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "mig-continue-sync"}}
-
-        binop = _binop_graph(saver)
-        _drive(binop, config, "u", 3)
-
-        pre_history = list(binop.get_state_history(config))
-        pre_boundaries = _settled_boundaries(pre_history)
-        # Latest settled boundary — the leaf pre-migration state.
-        leaf_cfg, leaf_items = pre_boundaries[0]
-        assert leaf_items, "expected non-empty pre-migration leaf"
-
-        delta = _delta_graph(saver)
-        delta.invoke({"items": ["after-migration"]}, leaf_cfg)
-        new_state = delta.get_state(config).values["items"]
-        assert new_state[: len(leaf_items)] == leaf_items
-        assert "after-migration" in new_state
-
-
-async def test_migration_preserves_pre_migration_state_async() -> None:
-    """Async equivalent of the basic-migration round-trip check on
-    `AsyncSqliteSaver`."""
-    async with AsyncSqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "mig-async"}}
-
-        binop = _binop_graph(saver)
-        await _adrive(binop, config, "u", 3)
-
-        pre_history = [s async for s in binop.aget_state_history(config)]
-        pre_boundaries = _settled_boundaries(pre_history)
-        assert len(pre_boundaries) >= 2
-
-        delta = _delta_graph(saver)
-        for cfg, items in pre_boundaries:
-            snap = await delta.aget_state(cfg)
-            assert list(snap.values.get("items", [])) == items, (
-                f"async snapshot mismatch at {cfg['configurable']['checkpoint_id']}"
-            )
@@ -1,271 +0,0 @@
-"""Smoke tests for `BaseCheckpointSaver.get_delta_channel_history` on sqlite.
-
-`SqliteSaver` (and `AsyncSqliteSaver`) deliberately don't override the
-default implementation in `BaseCheckpointSaver` — these tests pin the
-default impl to behave correctly end-to-end against a real persistent
-saver and a real `DeltaChannel`-backed graph.
-
-Scenarios covered:
-
-* Empty `channels` argument returns an empty mapping (no I/O).
-* On a non-trivial multi-checkpoint thread, per-channel writes come back
-  oldest→newest.
-* When the walk reaches the root without ever finding a stored value,
-  `seed` is omitted from the entry (consumer treats absence as "start
-  empty").
-* When a `_DeltaSnapshot` blob is present at an ancestor, it is returned
-  as the `seed`.
-* The async saver returns the same shape via `aget_delta_channel_history`.
-"""
-
-from __future__ import annotations
-
-import operator
-from typing import Annotated, Any
-
-import pytest
-from langchain_core.runnables import RunnableConfig
-
-# `langgraph` is not a dep of `langgraph-checkpoint-sqlite`. When tests run
-# in the sqlite lib's standalone CI environment without it installed, skip
-# the whole module rather than failing at import.
-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: 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  # noqa: E402
-from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver  # noqa: E402
-
-pytestmark = pytest.mark.anyio
-
-
-# ---------------------------------------------------------------------------
-# Graph helpers
-# ---------------------------------------------------------------------------
-
-
-def _noop(_state: Any) -> dict[str, Any]:
-    return {}
-
-
-class _DeltaState(TypedDict):
-    items: Annotated[list, DeltaChannel(operator.add)]
-
-
-def _delta_graph(checkpointer: Any) -> Any:
-    return (
-        StateGraph(_DeltaState)
-        .add_node("noop", _noop)
-        .add_edge(START, "noop")
-        .add_edge("noop", END)
-        .compile(checkpointer=checkpointer)
-    )
-
-
-def _drive(graph: Any, config: RunnableConfig, n: int) -> None:
-    for i in range(n):
-        graph.invoke({"items": [f"v{i}"]}, config)
-
-
-async def _adrive(graph: Any, config: RunnableConfig, n: int) -> None:
-    for i in range(n):
-        await graph.ainvoke({"items": [f"v{i}"]}, config)
-
-
-def _pick_non_root(saver: Any, config: RunnableConfig) -> RunnableConfig:
-    """Return a config pointing at a checkpoint that has at least one ancestor.
-
-    `get_delta_channel_history` walks the parent chain — calling it on the root
-    checkpoint produces `writes=[]` and no `seed`, which is uninteresting
-    for the multi-step assertions below.
-    """
-    history = list(saver.list(config))
-    assert history, "expected non-empty history"
-    # `list` yields newest→oldest; the second entry has the first entry
-    # as its parent, so its parent_config is non-None.
-    for tup in history:
-        if tup.parent_config is not None:
-            return tup.config
-    raise AssertionError("no checkpoint with a parent in history")
-
-
-async def _apick_non_root(saver: Any, config: RunnableConfig) -> RunnableConfig:
-    history = [tup async for tup in saver.alist(config)]
-    assert history, "expected non-empty history"
-    for tup in history:
-        if tup.parent_config is not None:
-            return tup.config
-    raise AssertionError("no checkpoint with a parent in history")
-
-
-# ---------------------------------------------------------------------------
-# Sync: SqliteSaver
-# ---------------------------------------------------------------------------
-
-
-def test_empty_channels_returns_empty_mapping_sync() -> None:
-    """Empty `channels` short-circuits to `{}` without touching storage."""
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "empty"}}
-        assert saver.get_delta_channel_history(config=config, channels=[]) == {}
-
-
-def test_writes_history_oldest_to_newest_sync() -> None:
-    """Per-channel writes accumulated across the walk come back oldest→newest."""
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "history-sync"}}
-        graph = _delta_graph(saver)
-        _drive(graph, config, 3)
-
-        target_cfg = _pick_non_root(saver, config)
-        result = saver.get_delta_channel_history(config=target_cfg, channels=["items"])
-
-        assert "items" in result
-        entry = result["items"]
-        assert isinstance(entry["writes"], list)
-
-        # If any writes were collected, their values should be in oldest→newest
-        # order — i.e. tagged 'v0', 'v1', ... matching invoke order.
-        write_values: list[Any] = []
-        for _task_id, channel, value in entry["writes"]:
-            assert channel == "items"
-            write_values.extend(value if isinstance(value, list) else [value])
-
-        # `_drive` invokes with payloads ['v0'], ['v1'], ['v2']. Whatever
-        # subset shows up in the chain must be a contiguous prefix in order.
-        for idx, val in enumerate(write_values):
-            assert val == f"v{idx}", (
-                f"writes not in oldest→newest order: {write_values}"
-            )
-
-
-def test_seed_present_when_snapshot_in_ancestor_sync() -> None:
-    """Inserting a `_DeltaSnapshot` blob at an ancestor → walk returns it as `seed`."""
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "seed-sync"}}
-        graph = _delta_graph(saver)
-        _drive(graph, config, 2)
-
-        # Find the oldest non-root checkpoint, then walk to its parent and
-        # rewrite that parent's `channel_values["items"]` to a real
-        # `_DeltaSnapshot`. After this surgery, calling `get_delta_channel_history`
-        # at the leaf must return the snapshot value as `seed`.
-        history = list(saver.list(config))
-        assert len(history) >= 2
-        leaf_tup = history[0]
-        # Walk to an ancestor with a parent_config (any non-root will do).
-        ancestor_tup = next(
-            (tup for tup in history if tup.parent_config is not None), None
-        )
-        assert ancestor_tup is not None
-        parent_cfg = ancestor_tup.parent_config
-        assert parent_cfg is not None
-        parent_tup = saver.get_tuple(parent_cfg)
-        assert parent_tup is not None
-
-        snapshot_value = ["seeded", "items"]
-        parent_tup.checkpoint["channel_values"]["items"] = _DeltaSnapshot(
-            snapshot_value
-        )
-        # Make sure the channel has a version so the optimized blob lookup
-        # in any future override has something to hit.
-        parent_tup.checkpoint["channel_versions"].setdefault("items", 1)
-        saver.put(
-            parent_tup.parent_config or {"configurable": parent_cfg["configurable"]},
-            parent_tup.checkpoint,
-            parent_tup.metadata,
-            {},
-        )
-
-        result = saver.get_delta_channel_history(
-            config=leaf_tup.config, channels=["items"]
-        )
-        entry = result["items"]
-        assert "seed" in entry, f"expected seed to be present, got {entry}"
-        seed = entry["seed"]
-        assert isinstance(seed, _DeltaSnapshot), (
-            f"expected _DeltaSnapshot, got {seed!r}"
-        )
-        assert seed.value == snapshot_value
-
-
-def test_seed_omitted_when_walk_reaches_root_sync() -> None:
-    """`get_delta_channel_history` on the root checkpoint → no `seed` key, no writes."""
-    with SqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "root-sync"}}
-        graph = _delta_graph(saver)
-        _drive(graph, config, 1)
-
-        history = list(saver.list(config))
-        # Root is the oldest checkpoint (no parent_config).
-        root_tup = history[-1]
-        assert root_tup.parent_config is None
-
-        result = saver.get_delta_channel_history(
-            config=root_tup.config, channels=["items"]
-        )
-        entry = result["items"]
-        assert "seed" not in entry, f"root-walk should have no seed, got {entry}"
-        assert entry["writes"] == []
-
-
-# ---------------------------------------------------------------------------
-# Async: AsyncSqliteSaver
-# ---------------------------------------------------------------------------
-
-
-async def test_empty_channels_returns_empty_mapping_async() -> None:
-    """Async equivalent of the empty-channels short-circuit."""
-    async with AsyncSqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "empty-async"}}
-        assert await saver.aget_delta_channel_history(config=config, channels=[]) == {}
-
-
-async def test_writes_history_oldest_to_newest_async() -> None:
-    """Async equivalent of the oldest→newest ordering check."""
-    async with AsyncSqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "history-async"}}
-        graph = _delta_graph(saver)
-        await _adrive(graph, config, 3)
-
-        target_cfg = await _apick_non_root(saver, config)
-        result = await saver.aget_delta_channel_history(
-            config=target_cfg, channels=["items"]
-        )
-
-        assert "items" in result
-        entry = result["items"]
-        assert isinstance(entry["writes"], list)
-
-        write_values: list[Any] = []
-        for _task_id, channel, value in entry["writes"]:
-            assert channel == "items"
-            write_values.extend(value if isinstance(value, list) else [value])
-
-        for idx, val in enumerate(write_values):
-            assert val == f"v{idx}", (
-                f"writes not in oldest→newest order: {write_values}"
-            )
-
-
-async def test_seed_omitted_when_walk_reaches_root_async() -> None:
-    """Async equivalent of the root-walk seed-absence check."""
-    async with AsyncSqliteSaver.from_conn_string(":memory:") as saver:
-        config: RunnableConfig = {"configurable": {"thread_id": "root-async"}}
-        graph = _delta_graph(saver)
-        await _adrive(graph, config, 1)
-
-        history = [tup async for tup in saver.alist(config)]
-        root_tup = history[-1]
-        assert root_tup.parent_config is None
-
-        result = await saver.aget_delta_channel_history(
-            config=root_tup.config, channels=["items"]
-        )
-        entry = result["items"]
-        assert "seed" not in entry, f"root-walk should have no seed, got {entry}"
-        assert entry["writes"] == []
@@ -1,10 +1,6 @@
 version = 1
 revision = 3
 requires-python = ">=3.10"
-resolution-markers = [
-    "python_full_version >= '3.15'",
-    "python_full_version < '3.15'",
-]

 [[package]]
 name = "aiosqlite"
@@ -253,7 +249,7 @@ wheels = [

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+version = "1.2.22"
 source = { registry = "https://pypi.org/simple" }
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 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.0a4"
+version = "4.0.1"
 source = { editable = "../checkpoint" }
 dependencies = [
    { name = "langchain-core" },
@@ -320,7 +316,7 @@ test = [

 [[package]]
 name = "langgraph-checkpoint-sqlite"
-version = "3.1.0a1"
+version = "3.0.3"
 source = { editable = "." }
 dependencies = [
    { name = "aiosqlite" },
@@ -389,7 +385,7 @@ test = [

 [[package]]
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-version = "0.7.31"
+version = "0.6.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
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@@ -399,12 +395,11 @@ dependencies = [
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-
 [[package]]
 name = "zstandard"
 version = "0.25.0"
@@ -26,9 +26,6 @@ You must pass these when invoking the graph as part of the configurable part of

 `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.
-
 ### Pending writes

 When a graph node fails mid-execution at a given superstep, LangGraph stores pending checkpoint writes from any other nodes that completed successfully at that superstep, so that whenever we resume graph execution from that superstep we don't re-run the successful nodes.
@@ -3,7 +3,7 @@ from __future__ import annotations
 import copy
 import logging
 from collections.abc import AsyncIterator, Collection, Iterator, Mapping, Sequence
-from typing import (
+from typing import (  # noqa: UP035
    Any,
    Generic,
    Literal,
@@ -13,7 +13,6 @@ from typing import (
 )

 from langchain_core.runnables import RunnableConfig
-from typing_extensions import NotRequired

 from langgraph.checkpoint.base.id import uuid6
 from langgraph.checkpoint.serde.base import SerializerProtocol, maybe_add_typed_methods
@@ -29,8 +28,6 @@ from langgraph.checkpoint.serde.types import (

 V = TypeVar("V", int, float, str)
 PendingWrite = tuple[str, str, Any]
-
-
 logger = logging.getLogger(__name__)


@@ -60,16 +57,6 @@ class CheckpointMetadata(TypedDict, total=False):
    """
    run_id: str
    """The ID of the run that created this checkpoint."""
-    delta_updates_since_snapshot: dict[str, int]
-    """Per-channel update count since the last `_DeltaSnapshot` was written.
-
-    Maps channel name → number of supersteps that wrote to this channel
-    since its last snapshot blob. Used by `pregel.create_checkpoint` to
-    decide when to write the next snapshot (when the count reaches the
-    channel's `snapshot_frequency`, snapshot fires and the count resets
-    to 0). Absent on threads that don't use delta channels. Version-format
-    independent — works for int, float, and string version schemes.
-    """


 ChannelVersions = dict[str, str | int | float]
@@ -132,28 +119,6 @@ class CheckpointTuple(NamedTuple):
    pending_writes: list[PendingWrite] | None = None


-class DeltaChannelHistory(TypedDict):
-    """Per-channel result entry from `BaseCheckpointSaver.get_delta_channel_history`.
-
-    Storage-level view of what one channel contributed across the ancestor
-    chain of a target checkpoint:
-
-    * `writes` — on-path deltas oldest→newest as `PendingWrite` tuples.
-      Always present; possibly empty. Already filtered to one channel.
-      Writes stored at the target checkpoint itself are pending for the
-      next super-step and are excluded.
-    * `seed` — the stored value at the nearest ancestor whose
-      `channel_values[ch]` is populated. Omitted if the walk reached the
-      root without finding any stored value (consumer treats absence as
-      "start empty"). Typically a `_DeltaSnapshot` for delta channels with
-      finite snapshot frequency, or a plain value for threads migrated
-      from a pre-delta channel type.
-    """
-
-    writes: list[PendingWrite]
-    seed: NotRequired[Any]
-
-
 class BaseCheckpointSaver(Generic[V]):
    """Base class for creating a graph checkpointer.

@@ -492,102 +457,6 @@ class BaseCheckpointSaver(Generic[V]):
        """
        raise NotImplementedError

-    def get_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Walk the parent chain returning per-channel writes + seed.
-
-        For each requested channel, walks ancestors of the checkpoint
-        identified by `config` (following `parent_config`) and accumulates
-        `pending_writes` for that channel. The walk terminates per-channel
-        at the nearest ancestor whose `channel_values[ch]` is populated;
-        that value is returned as `seed`. If the walk reaches the root
-        without finding a stored value, `seed` is omitted from that
-        channel's entry — the consumer treats the absence as "start
-        empty."
-
-        Walks the **parent chain** (not `list(before=...)`): for forked
-        threads, only on-path ancestors contribute.
-
-        The default implementation walks `get_tuple` + `parent_config`
-        once for all channels — each ancestor visited once, not once per
-        channel. Savers with direct storage access (`InMemorySaver`,
-        `PostgresSaver`) override for performance; the return contract is
-        fixed here.
-
-        Args:
-            config: Configuration identifying the target checkpoint.
-            channels: Channel names to walk for. Empty → empty mapping.
-
-        Returns:
-            Per-channel `DeltaChannelHistory` for every name in `channels`.
-        """
-        if not channels:
-            return {}
-        collected_by_ch: dict[str, list[PendingWrite]] = {c: [] for c in channels}
-        seed_by_ch: dict[str, Any] = {}
-        remaining: set[str] = set(channels)
-        target_tuple = self.get_tuple(config)
-        cursor_config: RunnableConfig | None = (
-            target_tuple.parent_config if target_tuple else None
-        )
-        while cursor_config is not None and remaining:
-            tup = self.get_tuple(cursor_config)
-            if tup is None:
-                break
-            if tup.pending_writes:
-                for write in reversed(tup.pending_writes):
-                    ch = write[1]
-                    if ch in remaining:
-                        collected_by_ch[ch].append(write)
-            for ch in list(remaining):
-                if ch in tup.checkpoint["channel_values"]:
-                    seed_by_ch[ch] = tup.checkpoint["channel_values"][ch]
-                    remaining.discard(ch)
-            cursor_config = tup.parent_config
-        result: dict[str, DeltaChannelHistory] = {}
-        for ch in channels:
-            entry: DeltaChannelHistory = {"writes": list(reversed(collected_by_ch[ch]))}
-            if ch in seed_by_ch:
-                entry["seed"] = seed_by_ch[ch]
-            result[ch] = entry
-        return result
-
-    async def aget_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Async version of `get_delta_channel_history`."""
-        if not channels:
-            return {}
-        collected_by_ch: dict[str, list[PendingWrite]] = {c: [] for c in channels}
-        seed_by_ch: dict[str, Any] = {}
-        remaining: set[str] = set(channels)
-        target_tuple = await self.aget_tuple(config)
-        cursor_config: RunnableConfig | None = (
-            target_tuple.parent_config if target_tuple else None
-        )
-        while cursor_config is not None and remaining:
-            tup = await self.aget_tuple(cursor_config)
-            if tup is None:
-                break
-            if tup.pending_writes:
-                for write in reversed(tup.pending_writes):
-                    ch = write[1]
-                    if ch in remaining:
-                        collected_by_ch[ch].append(write)
-            for ch in list(remaining):
-                if ch in tup.checkpoint["channel_values"]:
-                    seed_by_ch[ch] = tup.checkpoint["channel_values"][ch]
-                    remaining.discard(ch)
-            cursor_config = tup.parent_config
-        result: dict[str, DeltaChannelHistory] = {}
-        for ch in channels:
-            entry: DeltaChannelHistory = {"writes": list(reversed(collected_by_ch[ch]))}
-            if ch in seed_by_ch:
-                entry["seed"] = seed_by_ch[ch]
-            result[ch] = entry
-        return result
-
    def get_next_version(self, current: V | None, channel: None) -> V:
        """Generate the next version ID for a channel.

@@ -6,7 +6,7 @@ import pickle
 import random
 import shutil
 from collections import defaultdict
-from collections.abc import AsyncIterator, Iterator, Mapping, Sequence
+from collections.abc import AsyncIterator, Iterator, Sequence
 from contextlib import AbstractAsyncContextManager, AbstractContextManager, ExitStack
 from types import TracebackType
 from typing import Any
@@ -20,8 +20,6 @@ from langgraph.checkpoint.base import (
    Checkpoint,
    CheckpointMetadata,
    CheckpointTuple,
-    DeltaChannelHistory,
-    PendingWrite,
    SerializerProtocol,
    get_checkpoint_id,
    get_checkpoint_metadata,
@@ -123,115 +121,16 @@ class InMemorySaver(
        return self.stack.__exit__(__exc_type, __exc_value, __traceback)

    def _load_blobs(
-        self,
-        thread_id: str,
-        checkpoint_ns: str,
-        versions: ChannelVersions,
+        self, thread_id: str, checkpoint_ns: str, versions: ChannelVersions
    ) -> dict[str, Any]:
-        result: dict[str, Any] = {}
-        for k, ver in versions.items():
-            kk = (thread_id, checkpoint_ns, k, ver)
-            if kk not in self.blobs:
-                continue
-            vv = self.blobs[kk]
-            if vv[0] == "empty":
-                continue
-            result[k] = self.serde.loads_typed(vv)
-        return result
-
-    def get_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        """Override: walk the parent chain ONCE for all requested channels.
-
-        Each channel terminates independently at the nearest ancestor
-        whose stored blob is non-empty. Other channels keep walking until
-        they find their own terminator or hit the root.
-
-        Pre-delta plain-value blobs subsume their ancestor's pending
-        writes (the value already includes them); `_DeltaSnapshot` blobs
-        do not (snapshot is the value AT that ancestor, prior to its own
-        pending writes that produce the child).
-        """
-        if not channels:
-            return {}
-        # Imported lazily to avoid a hard checkpoint→serde-types coupling at
-        # module import; only this override needs the runtime check.
-        from langgraph.checkpoint.serde.types import _DeltaSnapshot
-
-        thread_id = config["configurable"]["thread_id"]
-        checkpoint_ns = config["configurable"].get("checkpoint_ns", "")
-        checkpoint_id = config["configurable"].get("checkpoint_id", "")
-        ns_storage = self.storage.get(thread_id, {}).get(checkpoint_ns, {})
-
-        chain: list[str] = []
-        target_entry = ns_storage.get(checkpoint_id)
-        current: str | None = target_entry[2] if target_entry is not None else None
-        while current is not None:
-            entry = ns_storage.get(current)
-            if entry is None:
-                break
-            chain.append(current)
-            _, _, parent = entry
-            current = parent
-
-        collected_by_ch: dict[str, list[PendingWrite]] = {c: [] for c in channels}
-        seed_by_ch: dict[str, Any] = {}
-        remaining: set[str] = set(channels)
-
-        for cp_id in chain:
-            if not remaining:
-                break
-            entry = ns_storage.get(cp_id)
-            ckpt = self.serde.loads_typed(entry[0]) if entry is not None else None
-
-            terminated_here: set[str] = set()
-            blob_value_by_ch: dict[str, Any] = {}
-            if ckpt is not None:
-                versions = ckpt.get("channel_versions", {})
-                for ch in remaining:
-                    ver = versions.get(ch)
-                    if ver is None:
-                        continue
-                    blob_entry = self.blobs.get((thread_id, checkpoint_ns, ch, ver))
-                    if blob_entry is None or blob_entry[0] == "empty":
-                        continue
-                    blob_value_by_ch[ch] = self.serde.loads_typed(blob_entry)
-                    terminated_here.add(ch)
-
-            step_writes = self.writes.get((thread_id, checkpoint_ns, cp_id), {})
-            for (_task_id, _idx), (tid, ch, serialized, _) in sorted(
-                step_writes.items(), reverse=True
-            ):
-                if ch not in remaining:
-                    continue
-                blob_value = blob_value_by_ch.get(ch)
-                if blob_value is not None and not isinstance(
-                    blob_value, _DeltaSnapshot
-                ):
-                    continue
-                collected_by_ch[ch].append(
-                    (tid, ch, self.serde.loads_typed(serialized))
-                )
-
-            for ch in terminated_here:
-                seed_by_ch[ch] = blob_value_by_ch[ch]
-                remaining.discard(ch)
-
-        result: dict[str, DeltaChannelHistory] = {}
-        for ch in channels:
-            entry_h: DeltaChannelHistory = {
-                "writes": list(reversed(collected_by_ch[ch]))
-            }
-            if ch in seed_by_ch:
-                entry_h["seed"] = seed_by_ch[ch]
-            result[ch] = entry_h
-        return result
-
-    async def aget_delta_channel_history(
-        self, *, config: RunnableConfig, channels: Sequence[str]
-    ) -> Mapping[str, DeltaChannelHistory]:
-        return self.get_delta_channel_history(config=config, channels=channels)
+        channel_values: dict[str, Any] = {}
+        for k, v in versions.items():
+            kk = (thread_id, checkpoint_ns, k, v)
+            if kk in self.blobs:
+                vv = self.blobs[kk]
+                if vv[0] != "empty":
+                    channel_values[k] = self.serde.loads_typed(vv)
+        return channel_values

    def get_tuple(self, config: RunnableConfig) -> CheckpointTuple | None:
        """Get a checkpoint tuple from the in-memory storage.
@@ -1,10 +1,3 @@
-"""Msgpack deserialization safety controls.
-
-Set ``LANGGRAPH_STRICT_MSGPACK=true`` to restrict checkpoint deserialization
-to the types listed in ``SAFE_MSGPACK_TYPES``.  Without this, any Python
-callable stored in checkpoint data will be imported and executed on load.
-"""
-
 import os
 from collections.abc import Iterable
 from typing import cast
@@ -73,7 +66,6 @@ SAFE_MSGPACK_TYPES: frozenset[tuple[str, ...]] = frozenset(
        ("langchain_core.documents.base", "Document"),
        # langgraph
        ("langgraph.types", "Send"),
-        ("langgraph.types", "TimeoutPolicy"),
        ("langgraph.types", "Interrupt"),
        ("langgraph.types", "Command"),
        ("langgraph.types", "StateSnapshot"),
@@ -33,51 +33,19 @@ from langchain_core.load.load import Reviver
 from langgraph.checkpoint.serde import _msgpack as _lg_msgpack
 from langgraph.checkpoint.serde.base import SerializerProtocol
 from langgraph.checkpoint.serde.event_hooks import emit_serde_event
-from langgraph.checkpoint.serde.types import (
-    SendProtocol,
-    _DeltaSnapshot,
-)
+from langgraph.checkpoint.serde.types import SendProtocol
 from langgraph.store.base import Item

 if TYPE_CHECKING:
    from langgraph.checkpoint.serde._msgpack import (
        AllowedMsgpackModules,
    )
+    from langgraph.checkpoint.serde.types import SendProtocol

 LC_REVIVER = Reviver()
 EMPTY_BYTES = b""
 logger = logging.getLogger(__name__)

-# Dedup log warnings across process lifetime; cap bounds state if types are
-# dynamically generated (also acts as a circuit breaker on warning volume).
-# Dedup is best-effort: racing threads may each emit once for the same key,
-# and warnings are silently dropped once _MAX_WARNED_TYPES is reached.
-_MAX_WARNED_TYPES = 1000
-_warned_unregistered_types: set[tuple[str, str]] = set()
-_warned_blocked_types: set[tuple[str, str]] = set()
-
-
-def _is_safe_json_type(id_list: list[str]) -> bool:
-    """Return True if an lc=2 id refers to a type in SAFE_MSGPACK_TYPES.
-
-    Safe types bypass the ``allowed_json_modules`` gate so that old "json" format
-    checkpoints (written before the msgpack migration) can be resumed without
-    requiring users to configure an explicit allowlist.
-    """
-    if len(id_list) < 2:
-        return False
-    module_name = ".".join(id_list[:-1])
-    return (module_name, id_list[-1]) in _lg_msgpack.SAFE_MSGPACK_TYPES
-
-
-def _warn_once(
-    seen: set[tuple[str, str]], key: tuple[str, str], msg: str, *args: object
-) -> None:
-    if key in seen or len(seen) >= _MAX_WARNED_TYPES:
-        return
-    seen.add(key)
-    logger.warning(msg, *args)
-

 class JsonPlusSerializer(SerializerProtocol):
    """Serializer that uses ormsgpack, with optional fallbacks.
@@ -88,10 +56,6 @@ class JsonPlusSerializer(SerializerProtocol):
        class and called within the Pregel loop. It should not be used on untrusted
        python objects. If an attacker can write directly to your checkpoint database,
        they may be able to trigger code execution when data is deserialized.
-
-        Set the environment variable ``LANGGRAPH_STRICT_MSGPACK=true`` to restrict
-        deserialization to a built-in allowlist of safe types.  You can also pass
-        an explicit ``allowed_msgpack_modules`` to the constructor.
    """

    def __init__(
@@ -106,11 +70,8 @@ class JsonPlusSerializer(SerializerProtocol):
    ) -> None:
        if allowed_msgpack_modules is _lg_msgpack._SENTINEL:
            if _lg_msgpack.STRICT_MSGPACK_ENABLED:
-                # Strict: only SAFE_MSGPACK_TYPES are allowed.
                allowed_msgpack_modules = None
            else:
-                # Permissive (default): all types allowed with a warning.
-                # Set LANGGRAPH_STRICT_MSGPACK=true to lock this down.
                allowed_msgpack_modules = True
        self.pickle_fallback = pickle_fallback
        self._allowed_json_modules: set[tuple[str, ...]] | Literal[True] | None = (
@@ -179,23 +140,19 @@ class JsonPlusSerializer(SerializerProtocol):
        return out

    def _reviver(self, value: dict[str, Any]) -> Any:
-        if (
+        if self._allowed_json_modules and (
            value.get("lc", None) == 2
            and value.get("type", None) == "constructor"
            and value.get("id", None) is not None
        ):
-            id_list = value["id"]
-            is_safe = _is_safe_json_type(id_list)
-            if self._allowed_json_modules or is_safe:
-                try:
-                    return self._revive_lc2(value)
-                except InvalidModuleError as e:
-                    if not is_safe:
-                        logger.warning(
-                            "Object %s is not in the deserialization allowlist.\n%s",
-                            value["id"],
-                            e.message,
-                        )
+            try:
+                return self._revive_lc2(value)
+            except InvalidModuleError as e:
+                logger.warning(
+                    "Object %s is not in the deserialization allowlist.\n%s",
+                    value["id"],
+                    e.message,
+                )

        return LC_REVIVER(value)

@@ -243,13 +200,6 @@ class JsonPlusSerializer(SerializerProtocol):
            method_display = "<init>"

        dotted = ".".join(needed)
-        # Safe types (the same set already allowed for msgpack deserialization) are
-        # permitted without an explicit allowlist — they are known-safe LangGraph and
-        # LangChain types.  This restores backwards-compat for old "json" checkpoints
-        # that pre-date the msgpack migration without reopening the broader security gate.
-        if _is_safe_json_type(list(needed)):
-            return
-
        if not self._allowed_json_modules:
            raise InvalidModuleError(
                f"Refused to deserialize JSON constructor: {dotted} (method: {method_display}). "
@@ -319,13 +269,10 @@ EXT_METHOD_SINGLE_ARG = 3
 EXT_PYDANTIC_V1 = 4
 EXT_PYDANTIC_V2 = 5
 EXT_NUMPY_ARRAY = 6
-EXT_DELTA_SNAPSHOT = 7


 def _msgpack_default(obj: Any) -> str | ormsgpack.Ext:
-    if isinstance(obj, _DeltaSnapshot):
-        return ormsgpack.Ext(EXT_DELTA_SNAPSHOT, _msgpack_enc(obj.value))
-    elif hasattr(obj, "model_dump") and callable(obj.model_dump):  # pydantic v2
+    if hasattr(obj, "model_dump") and callable(obj.model_dump):  # pydantic v2
        return ormsgpack.Ext(
            EXT_PYDANTIC_V2,
            _msgpack_enc(
@@ -497,13 +444,10 @@ def _msgpack_default(obj: Any) -> str | ormsgpack.Ext:
            ),
        )
    elif isinstance(obj, SendProtocol):
-        args: tuple[Any, ...] = (obj.node, obj.arg)
-        if (timeout := getattr(obj, "timeout", None)) is not None:
-            args = (obj.node, obj.arg, timeout)
        return ormsgpack.Ext(
            EXT_CONSTRUCTOR_POS_ARGS,
            _msgpack_enc(
-                (obj.__class__.__module__, obj.__class__.__name__, args),
+                (obj.__class__.__module__, obj.__class__.__name__, (obj.node, obj.arg)),
            ),
        )
    elif dataclasses.is_dataclass(obj):
@@ -554,15 +498,6 @@ def _msgpack_default(obj: Any) -> str | ormsgpack.Ext:
        raise TypeError(f"Object of type {obj.__class__.__name__} is not serializable")


-def _send_from_args(args: Sequence[Any]) -> Any:
-    # ya we have a cyclic import here ¯\_(ツ)_/¯
-    from langgraph.types import Send  # type: ignore
-
-    if len(args) == 2:
-        return Send(*args)
-    return Send(args[0], args[1], timeout=args[2])
-
-
 def _create_msgpack_ext_hook(
    allowed_modules: set[tuple[str, ...]] | Literal[True] | None,
 ) -> Callable[[int, bytes], Any]:
@@ -592,13 +527,10 @@ def _create_msgpack_ext_hook(
                    "name": name,
                }
            )
-            _warn_once(
-                _warned_unregistered_types,
-                key,
+            logger.warning(
                "Deserializing unregistered type %s.%s from checkpoint. "
                "This will be blocked in a future version. "
-                "Set LANGGRAPH_STRICT_MSGPACK=true to block now, or add "
-                "to allowed_msgpack_modules to allow explicitly: [(%r, %r)]",
+                "Add to allowed_msgpack_modules to silence: [(%r, %r)]",
                module,
                name,
                module,
@@ -616,9 +548,7 @@ def _create_msgpack_ext_hook(
                "name": name,
            }
        )
-        _warn_once(
-            _warned_blocked_types,
-            key,
+        logger.warning(
            "Blocked deserialization of %s.%s - not in allowed_msgpack_modules. "
            "Add to allowed_msgpack_modules to allow: [(%r, %r)]",
            module,
@@ -651,13 +581,7 @@ def _create_msgpack_ext_hook(
        return False

    def ext_hook(code: int, data: bytes) -> Any:
-        if code == EXT_DELTA_SNAPSHOT:
-            return _DeltaSnapshot(
-                ormsgpack.unpackb(
-                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
-                )
-            )
-        elif code == EXT_CONSTRUCTOR_SINGLE_ARG:
+        if code == EXT_CONSTRUCTOR_SINGLE_ARG:
            try:
                tup = ormsgpack.unpackb(
                    data, ext_hook=ext_hook, option=ormsgpack.OPT_NON_STR_KEYS
@@ -678,8 +602,6 @@ def _create_msgpack_ext_hook(
                )
                if not _check_allowed(tup[0], tup[1]):
                    return tup[2]
-                if tup[0] == "langgraph.types" and tup[1] == "Send":
-                    return _send_from_args(tup[2])
                # module, name, args
                return getattr(importlib.import_module(tup[0]), tup[1])(*tup[2])
            except Exception:
@@ -793,7 +715,9 @@ def _msgpack_ext_hook_to_json(code: int, data: bytes) -> Any:
                option=ormsgpack.OPT_NON_STR_KEYS,
            )
            if tup[0] == "langgraph.types" and tup[1] == "Send":
-                return _send_from_args(tup[2])
+                from langgraph.types import Send  # type: ignore
+
+                return Send(*tup[2])
            # module, name, args
            return tup[2]
        except Exception:
@@ -1,7 +1,6 @@
 from collections.abc import Sequence
 from typing import (
    Any,
-    NamedTuple,
    Protocol,
    TypeVar,
    runtime_checkable,
@@ -15,22 +14,6 @@ INTERRUPT = "__interrupt__"
 RESUME = "__resume__"
 TASKS = "__pregel_tasks"

-
-class _DeltaSnapshot(NamedTuple):
-    """Snapshot blob for a DeltaChannel with finite snapshot_frequency.
-
-    Stored in checkpoint_blobs via the `EXT_DELTA_SNAPSHOT` msgpack ext code.
-    The ancestor walk in `BaseCheckpointSaver.get_delta_channel_history` terminates
-    when it encounters this type (any non-empty channel_values entry stops
-    the walk for that channel).
-
-    `from_checkpoint` reconstructs the channel value directly from `.value`
-    without replaying writes — the snapshot IS the accumulated state.
-    """
-
-    value: Any
-
-
 Value = TypeVar("Value", covariant=True)
 Update = TypeVar("Update", contravariant=True)
 C = TypeVar("C")
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"

 [project]
 name = "langgraph-checkpoint"
-version = "4.1.0a4"
+version = "4.0.1"
 description = "Library with base interfaces for LangGraph checkpoint savers."
 authors = []
 requires-python = ">=3.10"
@@ -18,7 +18,7 @@ dependencies = [

 [project.urls]
 Source = "https://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint"
-Twitter = "https://x.com/langchain_oss"
+Twitter = "https://x.com/LangChain"
 Slack = "https://www.langchain.com/join-community"
 Reddit = "https://www.reddit.com/r/LangChain/"

@@ -29,8 +29,6 @@ from langgraph.checkpoint.serde.jsonplus import (
    EXT_METHOD_SINGLE_ARG,
    JsonPlusSerializer,
    _msgpack_enc,
-    _warned_blocked_types,
-    _warned_unregistered_types,
 )


@@ -104,13 +102,6 @@ def test_msgpack_method_pathlib_blocked_encrypted_strict(
 class TestEncryptedSerializerMsgpackAllowlist:
    """Test msgpack allowlist behavior through EncryptedSerializer."""

-    @pytest.fixture(autouse=True)
-    def _reset_warned_types(self) -> None:
-        # Warning dedup state is process-global; reset per-test so each case
-        # sees a fresh slate and assertions about warning emission are stable.
-        _warned_unregistered_types.clear()
-        _warned_blocked_types.clear()
-
    def test_safe_types_no_warning(self, caplog: pytest.LogCaptureFixture) -> None:
        """Test safe types deserialize without warnings through encryption."""
        serde = _make_encrypted_serde()
@@ -35,8 +35,6 @@ from langgraph.checkpoint.serde.jsonplus import (
    JsonPlusSerializer,
    _msgpack_enc,
    _msgpack_ext_hook_to_json,
-    _warned_blocked_types,
-    _warned_unregistered_types,
 )
 from langgraph.store.base import Item

@@ -333,57 +331,6 @@ def test_serde_jsonplus_bytes() -> None:
    assert serde.loads_typed(dumped) == some_bytes


-def test_lc2_json_safe_type_revives_without_allowlist() -> None:
-    """Old 'json' blobs with lc=2 for safe types must revive without an explicit allowlist.
-
-    Regression test for: https://github.com/langchain-ai/langgraph/issues/7498
-    Threads checkpointed before v1.0.1 (pre-msgpack) stored messages as lc=2 JSON
-    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
-
-    human_blob = {
-        "lc": 2,
-        "type": "constructor",
-        "id": ["langchain_core", "messages", "human", "HumanMessage"],
-        "kwargs": {"content": "hello", "type": "human"},
-    }
-    ai_blob = {
-        "lc": 2,
-        "type": "constructor",
-        "id": ["langchain_core", "messages", "ai", "AIMessage"],
-        "kwargs": {"content": "hi there", "type": "ai"},
-    }
-    result = serde.loads_typed(("json", json.dumps([human_blob, ai_blob]).encode()))
-
-    assert len(result) == 2
-    assert isinstance(result[0], HumanMessage), (
-        f"Expected HumanMessage, got {type(result[0])}: {result[0]!r}\n"
-        "lc=2 JSON blobs for safe types must deserialize without an explicit allowlist"
-    )
-    assert result[0].content == "hello"
-    assert isinstance(result[1], AIMessage)
-    assert result[1].content == "hi there"
-
-
-def test_lc2_json_unknown_type_stays_blocked_without_allowlist() -> None:
-    """lc=2 JSON blobs for types NOT in SAFE_MSGPACK_TYPES still require an allowlist."""
-    serde = JsonPlusSerializer()
-    load = {
-        "lc": 2,
-        "type": "constructor",
-        "id": ["pprint", "pprint"],
-        "kwargs": {"object": "HELLO"},
-    }
-    # No allowlist configured → raw dict returned (not raised, not reconstructed)
-    result = serde.loads_typed(("json", json.dumps(load).encode()))
-    assert isinstance(result, dict), "Unknown lc=2 type must stay as raw dict"
-    assert result.get("lc") == 2
-
-
 def test_deserde_invalid_module() -> None:
    serde = JsonPlusSerializer()
    load = {
@@ -633,14 +580,6 @@ def test_msgpack_safe_types_no_warning(caplog: pytest.LogCaptureFixture) -> None
        assert result is not None


-@pytest.fixture(autouse=True)
-def _reset_warned_types() -> None:
-    # Warning dedup state is process-global; reset per-test so each case sees
-    # a fresh slate and assertions about warning emission are stable.
-    _warned_unregistered_types.clear()
-    _warned_blocked_types.clear()
-
-
 def test_msgpack_pydantic_warns_by_default(caplog: pytest.LogCaptureFixture) -> None:
    """Pydantic models not in allowlist should log warning but still deserialize."""
    current = _lg_msgpack.STRICT_MSGPACK_ENABLED
@@ -656,12 +595,6 @@ def test_msgpack_pydantic_warns_by_default(caplog: pytest.LogCaptureFixture) ->
    assert "unregistered type" in caplog.text.lower()
    assert "allowed_msgpack_modules" in caplog.text
    assert result == obj
-
-    # Second deserialization of the same type should NOT produce another warning
-    caplog.clear()
-    result2 = serde.loads_typed(dumped)
-    assert "unregistered type" not in caplog.text.lower()
-    assert result2 == obj
    _lg_msgpack.STRICT_MSGPACK_ENABLED = current


@@ -706,6 +639,7 @@ def test_msgpack_allowlist_silences_warning(caplog: pytest.LogCaptureFixture) ->

 def test_msgpack_none_blocks_unregistered(caplog: pytest.LogCaptureFixture) -> None:
    """allowed_msgpack_modules=None should block unregistered types."""
+
    serde = JsonPlusSerializer(allowed_msgpack_modules=None)

    obj = MyPydantic(foo="test", bar=42, inner=InnerPydantic(hello="world"))
@@ -723,6 +657,7 @@ def test_msgpack_allowlist_blocks_non_listed(
    caplog: pytest.LogCaptureFixture,
 ) -> None:
    """Allowlists should block unregistered types even if msgpack is enabled."""
+
    serde = JsonPlusSerializer(
        allowed_msgpack_modules=[("tests.test_jsonplus", "MyPydantic")]
    )
@@ -12,25 +12,13 @@ from langgraph.checkpoint.base import (
    empty_checkpoint,
 )
 from langgraph.checkpoint.memory import InMemorySaver
-from langgraph.checkpoint.serde.jsonplus import (
-    JsonPlusSerializer,
-    _warned_blocked_types,
-    _warned_unregistered_types,
-)
+from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer


 class MemoryPydantic(BaseModel):
    foo: str


-@pytest.fixture(autouse=True)
-def _reset_warned_types() -> None:
-    # Warning dedup state is process-global; reset per-test so each case sees
-    # a fresh slate and assertions about warning emission are stable.
-    _warned_unregistered_types.clear()
-    _warned_blocked_types.clear()
-
-
 class TestMemorySaver:
    @pytest.fixture(autouse=True)
    def setup(self) -> None:
@@ -208,6 +196,8 @@ class TestMemorySaver:


 async def test_memory_saver() -> None:
+    from langgraph.checkpoint.memory import InMemorySaver
+
    memory_saver = InMemorySaver()
    assert isinstance(memory_saver, InMemorySaver)

@@ -318,363 +308,3 @@ def test_memory_saver_with_allowlist_proxy_isolated() -> None:
    assert direct is not None
    expected = obj.model_dump() if hasattr(obj, "model_dump") else obj.dict()
    assert direct.checkpoint["channel_values"]["foo"] == expected
-
-
-class TestInMemorySaverDeltaChannel:
-    def test_load_blobs_omits_delta_channel(self) -> None:
-        """_load_blobs omits delta channels (stored as 'empty'); reconstruction deferred."""
-        saver = InMemorySaver()
-
-        thread_id, ns, channel = "t1", "", "messages"
-        v1 = "00000000000000000000000000000001.0000000000000000"
-
-        saver.blobs[(thread_id, ns, channel, v1)] = ("empty", b"")
-
-        result = saver._load_blobs(thread_id, ns, {channel: v1})
-        assert channel not in result
-
-    def test_get_channel_writes_collects_ancestor_writes_only(self) -> None:
-        """`get_delta_channel_history` collects ancestor writes oldest→newest, and
-        excludes writes stored at the target checkpoint itself (those are
-        pending writes for the next step, applied separately by pregel).
-
-        When the walk reaches the root without finding any stored value for
-        the channel, the per-channel entry has no `seed` key (TypedDict
-        absence indicates "start empty").
-        """
-        saver = InMemorySaver()
-        serde = JsonPlusSerializer()
-
-        thread_id, ns, channel = "t1", "", "messages"
-
-        cp1 = empty_checkpoint()
-        cp1["id"] = "cp1"
-        cp2 = empty_checkpoint()
-        cp2["id"] = "cp2"
-        saver.storage[thread_id][ns] = {
-            "cp1": (serde.dumps_typed(cp1), serde.dumps_typed({}), None),
-            "cp2": (serde.dumps_typed(cp2), serde.dumps_typed({}), "cp1"),
-        }
-        # Writes stored at cp1 produced the cp1 snapshot; part of history.
-        saver.writes[(thread_id, ns, "cp1")][("task1", 0)] = (
-            "task1",
-            channel,
-            serde.dumps_typed({"content": "hi"}),
-            "",
-        )
-        # Writes stored at cp2 are pending — they will produce cp3 when the
-        # step that loaded cp2 completes. They MUST NOT appear in the
-        # reconstructed snapshot value at cp2.
-        saver.writes[(thread_id, ns, "cp2")][("task2", 0)] = (
-            "task2",
-            channel,
-            serde.dumps_typed({"content": "pending"}),
-            "",
-        )
-
-        config: RunnableConfig = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": ns,
-                "checkpoint_id": "cp2",
-            }
-        }
-        result = saver.get_delta_channel_history(config=config, channels=[channel])[
-            channel
-        ]
-        # Walk reached the root without finding a stored value → no `seed` key.
-        assert "seed" not in result
-        values = [v for _, _, v in result["writes"]]
-        assert values == [{"content": "hi"}]
-
-    def test_get_channel_writes_at_root_returns_empty(self) -> None:
-        """Reconstructing the root checkpoint's state: no ancestors → []."""
-        saver = InMemorySaver()
-        serde = JsonPlusSerializer()
-        thread_id, ns, channel = "t1", "", "messages"
-
-        cp1 = empty_checkpoint()
-        cp1["id"] = "cp1"
-        saver.storage[thread_id][ns] = {
-            "cp1": (serde.dumps_typed(cp1), serde.dumps_typed({}), None),
-        }
-        saver.writes[(thread_id, ns, "cp1")][("task1", 0)] = (
-            "task1",
-            channel,
-            serde.dumps_typed({"content": "pending"}),
-            "",
-        )
-
-        config: RunnableConfig = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": ns,
-                "checkpoint_id": "cp1",
-            }
-        }
-        result = saver.get_delta_channel_history(config=config, channels=[channel])[
-            channel
-        ]
-        # No ancestors → no seed found, no writes accumulated.
-        assert "seed" not in result
-        assert result["writes"] == []
-
-
-class TestBaseFallbackGetChannelWrites:
-    """Exercises the `BaseCheckpointSaver.get_delta_channel_history` default
-    implementation — the path third-party savers inherit when they don't
-    override `get_delta_channel_history` themselves.
-
-    Regression guard for a bug where the fallback passed the caller's config
-    (with `checkpoint_id`) straight to `self.list()`, which most savers
-    collapse to a single row — causing the fallback to return `[]`.
-    """
-
-    def _build_saver_with_chain(self) -> tuple[InMemorySaver, str, str]:
-        """Build an InMemorySaver with a 3-checkpoint chain and per-step writes
-        for a `messages` channel.
-
-        Returns `(saver, thread_id, namespace)`. The saver subclass deletes the
-        InMemorySaver override so the base class fallback is exercised.
-        """
-
-        class _ThirdPartyStyleSaver(InMemorySaver):
-            get_delta_channel_history = (
-                InMemorySaver.__mro__[1].get_delta_channel_history  # type: ignore[attr-defined]
-            )
-            aget_delta_channel_history = (
-                InMemorySaver.__mro__[1].aget_delta_channel_history  # type: ignore[attr-defined]
-            )
-
-        saver = _ThirdPartyStyleSaver()
-        serde = JsonPlusSerializer()
-        thread_id, ns, channel = "t1", "", "messages"
-
-        cp0 = empty_checkpoint()
-        cp0["id"] = "00000000000000000000000000000001.0000000000000000"
-        cp1 = empty_checkpoint()
-        cp1["id"] = "00000000000000000000000000000002.0000000000000000"
-        cp2 = empty_checkpoint()
-        cp2["id"] = "00000000000000000000000000000003.0000000000000000"
-        saver.storage[thread_id][ns] = {
-            cp0["id"]: (serde.dumps_typed(cp0), serde.dumps_typed({}), None),
-            cp1["id"]: (serde.dumps_typed(cp1), serde.dumps_typed({}), cp0["id"]),
-            cp2["id"]: (serde.dumps_typed(cp2), serde.dumps_typed({}), cp1["id"]),
-        }
-        # Writes under cp0 produced cp1's state; writes under cp1 produced cp2's.
-        saver.writes[(thread_id, ns, cp0["id"])][("task1", 0)] = (
-            "task1",
-            channel,
-            serde.dumps_typed({"content": "first"}),
-            "",
-        )
-        saver.writes[(thread_id, ns, cp1["id"])][("task2", 0)] = (
-            "task2",
-            channel,
-            serde.dumps_typed({"content": "second"}),
-            "",
-        )
-        return saver, thread_id, ns
-
-    def test_fallback_returns_ancestor_writes_oldest_first(self) -> None:
-        saver, thread_id, ns = self._build_saver_with_chain()
-        target_id = "00000000000000000000000000000003.0000000000000000"
-        config: RunnableConfig = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": ns,
-                "checkpoint_id": target_id,
-            }
-        }
-
-        result = saver.get_delta_channel_history(config=config, channels=["messages"])[
-            "messages"
-        ]
-
-        # Walk reached root without a stored value → `seed` key absent.
-        assert "seed" not in result
-        values = [v for _, _, v in result["writes"]]
-        assert values == [{"content": "first"}, {"content": "second"}]
-
-    async def test_async_fallback_returns_ancestor_writes_oldest_first(self) -> None:
-        saver, thread_id, ns = self._build_saver_with_chain()
-        target_id = "00000000000000000000000000000003.0000000000000000"
-        config: RunnableConfig = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": ns,
-                "checkpoint_id": target_id,
-            }
-        }
-
-        result = (
-            await saver.aget_delta_channel_history(config=config, channels=["messages"])
-        )["messages"]
-
-        assert "seed" not in result
-        values = [v for _, _, v in result["writes"]]
-        assert values == [{"content": "first"}, {"content": "second"}]
-
-    async def test_async_fallback_concurrent_tasks_do_not_interfere(self) -> None:
-        """Regression: the re-entrancy guard must be task-local, not thread-local.
-
-        Two concurrent `aget_delta_channel_history` calls on the same event-loop
-        thread must each see their full reconstructed writes. A
-        `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()
-
-        # Force the two tasks to interleave across the `set(True)` boundary:
-        # each `aget_tuple` yields control, so if the guard were thread-local
-        # the second task would observe `active=True` set by the first.
-        orig_aget_tuple = saver.aget_tuple
-
-        async def slow_aget_tuple(config: RunnableConfig) -> Any:
-            await asyncio.sleep(0)
-            return await orig_aget_tuple(config)
-
-        saver.aget_tuple = slow_aget_tuple  # type: ignore[method-assign]
-
-        target_id = "00000000000000000000000000000003.0000000000000000"
-        config: RunnableConfig = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": ns,
-                "checkpoint_id": target_id,
-            }
-        }
-
-        results = await asyncio.gather(
-            saver.aget_delta_channel_history(config=config, channels=["messages"]),
-            saver.aget_delta_channel_history(config=config, channels=["messages"]),
-        )
-
-        expected_values = [{"content": "first"}, {"content": "second"}]
-        for result_map in results:
-            result = result_map["messages"]
-            assert "seed" not in result
-            values = [v for _, _, v in result["writes"]]
-            assert values == expected_values
-
-
-class TestPreDeltaBlobTerminator:
-    """Verify the pre-delta blob terminator: when the ancestor walk hits a
-    checkpoint whose blob for the channel is a real value, reconstruction
-    seeds from it and stops. This guards
-
-      * back-compat: a thread written by pre-delta code, then extended under
-        delta — reconstruction must return the correct value without walking
-        past the last pre-delta ancestor;
-      * perf: without the terminator, every reconstruct-after-migration would
-        walk all the way to the thread root.
-
-    Under the new public API a found seed populates `seed` in the
-    `DeltaChannelHistory` TypedDict; absence of the `seed` key means the walk
-    reached root without finding a stored value.
-    """
-
-    def _build_mixed_thread(self) -> tuple[InMemorySaver, str, str, str, str]:
-        """Three-checkpoint chain: cp1 (pre-delta, blob=[A]), cp2 (delta,
-        write=B), cp3 (delta, write=C). Reconstructing at cp3 must yield
-        seed=[A] + writes=[B, C].
-
-        Returns `(saver, thread_id, ns, channel, cp3_id)`.
-        """
-        saver = InMemorySaver()
-        serde = JsonPlusSerializer()
-        thread_id, ns, channel = "t1", "", "messages"
-
-        v1 = "00000000000000000000000000000001.0"
-        v2 = "00000000000000000000000000000002.0"
-        v3 = "00000000000000000000000000000003.0"
-
-        # Pre-delta: cp1 stored a real blob for the channel.
-        saver.blobs[(thread_id, ns, channel, v1)] = serde.dumps_typed(["A"])
-        # Delta-era: cp2 and cp3 store "empty"; real writes in checkpoint_writes.
-        saver.blobs[(thread_id, ns, channel, v2)] = ("empty", b"")
-        saver.blobs[(thread_id, ns, channel, v3)] = ("empty", b"")
-
-        cp1 = empty_checkpoint()
-        cp1["id"] = "cp1"
-        cp1["channel_versions"][channel] = v1
-        cp2 = empty_checkpoint()
-        cp2["id"] = "cp2"
-        cp2["channel_versions"][channel] = v2
-        cp3 = empty_checkpoint()
-        cp3["id"] = "cp3"
-        cp3["channel_versions"][channel] = v3
-
-        saver.storage[thread_id][ns] = {
-            "cp1": (serde.dumps_typed(cp1), serde.dumps_typed({}), None),
-            "cp2": (serde.dumps_typed(cp2), serde.dumps_typed({}), "cp1"),
-            "cp3": (serde.dumps_typed(cp3), serde.dumps_typed({}), "cp2"),
-        }
-        # Write under cp1 would be from the pre-delta era and MUST be ignored
-        # (the blob already captures it). We add one and assert it is not
-        # folded into the reconstructed result.
-        saver.writes[(thread_id, ns, "cp1")][("task0", 0)] = (
-            "task0",
-            channel,
-            serde.dumps_typed("PRE-DELTA-WRITE"),
-            "",
-        )
-        saver.writes[(thread_id, ns, "cp2")][("task2", 0)] = (
-            "task2",
-            channel,
-            serde.dumps_typed("B"),
-            "",
-        )
-        saver.writes[(thread_id, ns, "cp3")][("task3", 0)] = (
-            "task3",
-            channel,
-            serde.dumps_typed("PENDING-AT-TARGET"),
-            "",
-        )
-        return saver, thread_id, ns, channel, "cp3"
-
-    def test_seed_from_pre_delta_ancestor_blob(self) -> None:
-        saver, thread_id, ns, channel, target = self._build_mixed_thread()
-        config: RunnableConfig = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": ns,
-                "checkpoint_id": target,
-            }
-        }
-
-        result = saver.get_delta_channel_history(config=config, channels=[channel])[
-            channel
-        ]
-
-        # Seed came from the pre-delta blob at cp1.
-        assert result["seed"] == ["A"]
-        # Delta-era writes from cp2 replay through the reducer on top of seed.
-        # cp3 is the target — its own write is pending for the NEXT step and
-        # must be excluded.
-        values = [v for _, _, v in result["writes"]]
-        assert values == ["B"]
-
-    def test_pre_delta_blob_terminates_walk_before_older_writes(self) -> None:
-        """Writes stored at the pre-delta ancestor itself must not be replayed
-        (the blob subsumes them)."""
-        saver, thread_id, ns, channel, target = self._build_mixed_thread()
-        config: RunnableConfig = {
-            "configurable": {
-                "thread_id": thread_id,
-                "checkpoint_ns": ns,
-                "checkpoint_id": target,
-            }
-        }
-
-        result = saver.get_delta_channel_history(config=config, channels=[channel])[
-            channel
-        ]
-
-        values = [v for _, _, v in result["writes"]]
-        # The pre-delta write under cp1 must not appear (the blob subsumes it).
-        assert "PRE-DELTA-WRITE" not in values
-        # And the pending write at the target is never folded in.
-        assert "PENDING-AT-TARGET" not in values
@@ -2,8 +2,7 @@ version = 1
 revision = 3
 requires-python = ">=3.10"
 resolution-markers = [
-    "python_full_version >= '3.15'",
-    "python_full_version >= '3.12' and python_full_version < '3.15'",
+    "python_full_version >= '3.12'",
    "python_full_version == '3.11.*'",
    "python_full_version < '3.11'",
 ]
@@ -268,11 +267,10 @@ wheels = [

 [[package]]
 name = "langchain-core"
-version = "1.3.2"
+version = "1.2.23"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "jsonpatch" },
-    { name = "langchain-protocol" },
    { name = "langsmith" },
    { name = "packaging" },
    { name = "pydantic" },
@@ -281,26 +279,14 @@ dependencies = [
    { name = "typing-extensions" },
    { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/a8/03/7219502e8ca728d65eb44d7a3eb60239230742a70dbfc9241b9bfd61c4ab/langchain_core-1.3.2.tar.gz", hash = "sha256:fd7a50b2f28ba561fd9d7f5d2760bc9e06cf00cdf820a3ccafe88a94ffa8d5b7", size = 911813, upload-time = "2026-04-24T15:49:23.699Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/1d/47/a5f21b651e9cbd7a26c3e5809336d10a0be94ef7bdf6bea47f2ad9fff1a8/langchain_core-1.2.23.tar.gz", hash = "sha256:fdec64f90cfea25317e88d9803c44684af1f4e30dec4e58320dd7393bb0f0785", size = 841684, upload-time = "2026-03-27T23:28:14.6Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/7d/d5/8fa4431007cbb7cfed7590f4d6a5dea3ad724f4174d248f6642ef5ce7d05/langchain_core-1.3.2-py3-none-any.whl", hash = "sha256:d44a66127f9f8db735bdfd0ab9661bccb47a97113cfd3f2d89c74864422b7274", size = 542390, upload-time = "2026-04-24T15:49:21.991Z" },
-]
-
-[[package]]
-name = "langchain-protocol"
-version = "0.0.15"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "typing-extensions" },
-]
-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/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" },
+    { url = "https://files.pythonhosted.org/packages/9b/5a/6ff2d76618e4cac531ea51d4ef44c6add36575a84c3f0f8877aee68c951a/langchain_core-1.2.23-py3-none-any.whl", hash = "sha256:70866dfc5275b7840ce272ff70f0ff216c8666ab25dc1b41964a4ef58c02a3ff", size = 506709, upload-time = "2026-03-27T23:28:13.372Z" },
 ]

 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.0a4"
+version = "4.0.1"
 source = { editable = "." }
 dependencies = [
    { name = "langchain-core" },
@@ -383,7 +369,7 @@ test = [

 [[package]]
 name = "langsmith"
-version = "0.7.31"
+version = "0.6.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "httpx" },
@@ -393,12 +379,11 @@ dependencies = [
    { name = "requests" },
    { name = "requests-toolbelt" },
    { name = "uuid-utils" },
-    { name = "xxhash" },
    { name = "zstandard" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/e6/11/696019490992db5c87774dc20515529ef42a01e1d770fb754ed6d9b12fb0/langsmith-0.7.31.tar.gz", hash = "sha256:331ee4f7c26bb5be4022b9859b7d7b122cbf8c9d01d9f530114c1914b0349ffb", size = 1178480, upload-time = "2026-04-14T17:55:41.242Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/e7/85/9c7933052a997da1b85bc5c774f3865e9b1da1c8d71541ea133178b13229/langsmith-0.6.4.tar.gz", hash = "sha256:36f7223a01c218079fbb17da5e536ebbaf5c1468c028abe070aa3ae59bc99ec8", size = 919964, upload-time = "2026-01-15T20:02:28.873Z" }
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-
 [[package]]
 name = "zstandard"
 version = "0.25.0"
@@ -1 +1,3 @@
 .langgraph_api/
+# Go cross-compiled binaries (built at release time, bundled into wheels)
+langgraph_cli/bin/
@@ -0,0 +1,374 @@
+# Go Migration Plan
+
+## Goal
+
+Move the full `langgraph` CLI implementation to Go while preserving existing
+Python distribution and invocation flows.
+
+Users should continue to be able to run:
+
+- `langgraph ...`
+- `uv run langgraph ...`
+- `uvx langgraph ...`
+
+During phase 1, the Go path is gated behind a feature flag. The Python package
+remains the public entrypoint and launcher.
+
+## Non-Goals
+
+This phase does not include:
+
+- JS migration
+- `langsmith-cli` integration
+- user-facing command renames
+- intentional CLI behavior changes
+- a long-lived dual implementation
+
+## Source Of Truth
+
+There will be one implementation of CLI behavior:
+
+- shared Go implementation lives in the `langgraph` repo
+- standalone Go `langgraph` binary uses that implementation
+- Python `langgraph-cli` package is a thin launcher around that binary
+- legacy Python implementation exists only temporarily as fallback during rollout
+
+## Phase 1 Artifacts
+
+Phase 1 ships these artifacts:
+
+- shared Go package(s) in `langgraph`
+- standalone `langgraph` Go binary
+- Python wheel `langgraph-cli` that bundles the platform-specific Go binary
+- Python launcher entrypoint that can route to legacy Python or Go
+
+JS is explicitly out of scope for phase 1.
+
+## User-Facing Command Scope
+
+Phase 1 scope is the whole `langgraph` CLI, not just deploy.
+
+Target command coverage:
+
+- `langgraph deploy ...`
+- `langgraph build ...`
+- `langgraph up ...`
+- `langgraph dockerfile ...`
+- `langgraph dev ...`
+- `langgraph new ...`
+
+The goal is full parity with the current Python CLI command surface.
+
+## Compatibility Contract
+
+Behavior must not regress.
+
+Required parity:
+
+- exact JSON output where commands emit JSON
+- exact or equivalent error semantics
+- same exit codes
+- same argument and flag behavior
+- same generated artifacts for:
+  - Dockerfile output
+  - docker compose / inline compose output
+- same API request semantics where mocked in tests
+
+Human-readable output should be same or better, but not worse.
+
+## Repo Ownership
+
+Shared implementation lives in the current `langgraph` repo.
+
+Reasons:
+
+- current CLI spec and tests already live here
+- rollout is initially only for `langgraph-cli`
+- command compatibility should be driven by existing behavior in this repo
+
+## Architecture
+
+Use process boundaries, not language FFI.
+
+Python should not call a Go shared library directly. Instead:
+
+- Python launcher locates bundled `langgraph` Go binary
+- Python launcher `exec`s or subprocesses into the Go binary
+- Go handles all command execution
+- for `dev`, Go subprocesses back into Python
+
+This keeps the boundary simple and cross-platform.
+
+## Go Package Structure
+
+Recommended structure:
+
+- `pkg/cli/config`
+  - parse and validate `langgraph.json`
+  - normalize config model
+- `pkg/cli/docker`
+  - docker capability detection
+  - compose generation
+  - Dockerfile/build plan generation
+- `pkg/cli/deploy`
+  - deployment flows
+  - host backend client
+  - polling, logs, revision logic
+- `pkg/cli/dev`
+  - `dev` command orchestration
+  - Python subprocess handoff
+- `pkg/cli/cmds`
+  - command runner functions with typed options/results
+  - no Cobra-specific code here
+- `cmd/langgraph`
+  - standalone Go binary wrapping shared packages
+
+Business logic should live in shared packages, not directly in CLI adapter code.
+
+## Python Wrapper Model
+
+The Python package remains installed as `langgraph-cli`, with entrypoint
+`langgraph`.
+
+During migration, the wrapper decides whether to route to legacy Python or Go.
+
+Wrapper behavior:
+
+1. inspect feature flags
+2. resolve Go binary path
+3. if Go path is active, `exec` into Go binary
+4. otherwise fall back to legacy Python implementation
+
+Long-term target:
+
+- remove fallback
+- Python wrapper always launches bundled Go binary
+
+## Feature Flags
+
+Temporary rollout env vars:
+
+- `LANGGRAPH_USE_GO_CLI=1`
+  - route the Python wrapper to the Go binary instead of legacy Python
+- `LANGGRAPH_GO_CLI_PATH=/path/to/langgraph`
+  - internal/dev/CI override for binary path resolution
+  - not intended as a long-term public interface
+- `LANGGRAPH_CALLING_PYTHON=/path/to/python`
+  - set by the Python wrapper before invoking Go
+  - used by Go for `dev`
+
+`LANGGRAPH_GO_CLI_PATH` is mainly for local development and CI and can be
+removed later.
+
+## `dev` Invocation Contract
+
+`dev` is the main tricky area.
+
+Design rule:
+
+- Go owns CLI parsing and routing
+- Python owns the actual in-process local dev server runtime
+
+Flow for `uv run langgraph dev`:
+
+1. `uv` selects the Python interpreter/environment
+2. Python wrapper starts
+3. Python wrapper sets `LANGGRAPH_CALLING_PYTHON=sys.executable`
+4. Python wrapper launches Go binary
+5. Go receives `dev`
+6. Go shells out to that exact Python interpreter for the actual Python runtime behavior
+
+This preserves the current selected Python environment.
+
+Go Python resolution order for `dev`:
+
+1. `LANGGRAPH_CALLING_PYTHON`
+2. optional explicit override if added later
+3. environment-derived interpreter / active venv
+4. fallback detection
+5. clear failure
+
+The critical constraint is: if the user entered through Python, `dev` should
+use that exact Python when possible.
+
+## Why Not FFI
+
+Do not use:
+
+- cgo shared libs
+- Python-Go FFI bindings
+- embedded Python in Go
+- RPC unless absolutely necessary
+
+Reasons:
+
+- packaging complexity
+- cross-platform pain
+- no advantage for a CLI architecture
+- much worse release/debug story
+
+Process-level boundaries are the right choice here.
+
+## Packaging Constraints
+
+The Go binary should be bundled inside Python wheels.
+
+Preferred distribution model:
+
+- build platform-specific `langgraph-cli` wheels
+- each wheel includes the matching `langgraph` Go binary
+- Python launcher resolves and executes the bundled binary
+
+Do not rely on runtime download of the binary for normal operation.
+
+Support matrix target:
+
+- all OS/arch targets that are currently expected to be supported
+- at minimum, align with the practical support matrix desired for the CLI,
+  using `orjson` support as a rough proxy if needed
+
+If a platform is unsupported, fail clearly rather than silently falling back
+forever.
+
+## Release Constraints
+
+Phase 1 versioning applies to:
+
+- shared Go implementation
+- standalone Go `langgraph` binary
+- PyPI `langgraph-cli` wrapper
+
+They should stay on one version line.
+
+Constraint:
+
+- bundled Go binary version must exactly match the Python wrapper version for
+  the migrated surface
+
+The wrapper should detect obvious mismatch and fail clearly if it occurs.
+
+## Migration Strategy
+
+Use a big-bang hidden implementation change with gradual activation.
+
+Phase 1 rollout:
+
+1. implement full Go path behind `LANGGRAPH_USE_GO_CLI`
+2. keep default behavior on legacy Python
+3. run dual CI for legacy and Go-backed paths
+4. dogfood with feature flag
+5. flip default to Go
+6. keep fallback briefly
+7. remove fallback in about two weeks
+
+This is a big internal rewrite with gradual external activation.
+
+## CI Strategy
+
+Dual CI is required during migration.
+
+Run both variants:
+
+- legacy Python implementation
+- Python wrapper -> Go binary implementation
+
+Required parity checks:
+
+- help output
+- exit code
+- stdout
+- stderr
+- generated Dockerfile output
+- generated compose output
+- mocked deployment API request semantics
+- validation errors / usage errors
+
+Goal is not merely "both tests pass". Goal is "both implementations behave
+identically enough to swap by default safely".
+
+## Parity Test Philosophy
+
+Use the current Python CLI tests as the behavioral spec.
+
+Priority test areas:
+
+- config validation
+- compose/Dockerfile generation
+- deployment flows
+- error and prompt behavior
+- command help / command surface
+
+Where practical, add golden comparisons so regressions are obvious.
+
+## Implementation Order Inside Phase 1
+
+Even though rollout is one hidden phase, implementation should proceed in this
+order:
+
+1. wrapper contract and env contract
+2. Go command scaffolding and package boundaries
+3. config + docker/build/compose logic
+4. deploy flows
+5. remaining commands
+6. `dev` subprocess orchestration
+7. parity hardening in CI
+
+This reduces risk because `dev` is the highest-uncertainty area.
+
+## Command Ownership Constraint
+
+All command behavior should live in Go once ported.
+
+Do not allow:
+
+- some flags parsed in Python and others in Go
+- duplicated command logic across Python and Go
+- separate behavior definitions for legacy and migrated commands
+
+The wrapper should be thin only.
+
+## Fallback Constraint
+
+Fallback is temporary, not a product feature.
+
+Policy:
+
+- use feature flag during migration
+- flip default after parity confidence
+- remove legacy Python implementation roughly two weeks later
+
+Do not normalize to permanent dual execution paths.
+
+## Documentation Constraint
+
+During migration, documentation should stay conservative:
+
+- existing Python install flow remains primary
+- feature flag is acceptable for internal/dogfood docs
+- avoid broad external messaging about the Go implementation until default is flipped
+
+## Open Issues To Track
+
+These are not blockers, but they need explicit implementation decisions:
+
+- exact bundled wheel layout for binaries
+- exact list of supported OS/arch targets
+- whether to expose a public `--python` override for `dev`
+- whether some pretty output is allowed to improve while keeping parsed output stable
+
+## Summary
+
+Phase 1 plan:
+
+- move the entire `langgraph` CLI implementation into shared Go code in the
+  `langgraph` repo
+- ship a standalone `langgraph` Go binary
+- keep `langgraph-cli` on PyPI as a thin launcher that bundles and executes
+  that binary
+- preserve `uv run` / `uvx` behavior
+- handle `dev` by passing the calling Python path through the wrapper and
+  having Go subprocess back into Python
+- gate everything behind `LANGGRAPH_USE_GO_CLI`
+- run dual CI until parity is proven
+- flip default
+- remove legacy fallback quickly
@@ -1,15 +1,21 @@
 .PHONY: test lint type format test-integration update-schema bump-version
+.PHONY: test-go lint-go format-go
+.PHONY: build-go build-go-all clean-go-bin

 ######################
 # TESTING AND COVERAGE
 ######################

 TEST?= "tests/unit_tests"
-test:
+GO_FILES=$(shell find cmd internal -type f -name '*.go' 2>/dev/null)
+test: test-go
 	uv run pytest $(TEST)
 test-integration:
 	uv run pytest tests/integration_tests

+test-go:
+	[ ! -f go.mod ] || go test ./...
+
 ######################
 # LINTING AND FORMATTING
 ######################
@@ -23,19 +29,94 @@ lint_package: PYTHON_FILES=langgraph_cli
 lint_tests: PYTHON_FILES=tests
 lint_tests: MYPY_CACHE=.mypy_cache_test

-lint lint_diff lint_package lint_tests:
+lint lint_diff lint_package lint_tests: lint-go
 	uv run ruff check .
 	[ "$(PYTHON_FILES)" = "" ] || uv run ruff format $(PYTHON_FILES) --diff
 	[ "$(PYTHON_FILES)" = "" ] || uv run ruff check --select I $(PYTHON_FILES)
 	[ "$(PYTHON_FILES)" = "" ] || mkdir -p $(MYPY_CACHE) || uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)

+lint-go:
+	[ -z "$(GO_FILES)" ] || test -z "$$(gofmt -l $(GO_FILES))"
+
 type:
 	mkdir -p $(MYPY_CACHE) && uv run mypy $(PYTHON_FILES) --cache-dir $(MYPY_CACHE)

-format format_diff:
+format format_diff: format-go
 	uv run ruff format $(PYTHON_FILES)
 	uv run ruff check --select I --fix $(PYTHON_FILES)

+format-go:
+	[ -z "$(GO_FILES)" ] || gofmt -w $(GO_FILES)
+
+######################
+# GO BINARY CROSS-COMPILATION
+######################
+
+GO_MODULE=github.com/langchain-ai/langgraph/libs/cli
+GO_BINARY=cmd/langgraph/main.go
+GO_VERSION_PKG=$(GO_MODULE)/internal/version
+GO_BIN_DIR=langgraph_cli/bin
+GO_VERSION=$(shell grep -m 1 '^__version__' langgraph_cli/__init__.py | cut -d '"' -f 2)
+GO_COMMIT=$(shell git rev-parse --short HEAD 2>/dev/null || echo "unknown")
+GO_DATE=$(shell date -u +%Y-%m-%dT%H:%M:%SZ)
+GO_LDFLAGS=-s -w \
+  -X '$(GO_VERSION_PKG).Version=$(GO_VERSION)' \
+  -X '$(GO_VERSION_PKG).Commit=$(GO_COMMIT)' \
+  -X '$(GO_VERSION_PKG).Date=$(GO_DATE)'
+
+# Platform matrix — covers every platform orjson ships for. Since the Go
+# binary is statically linked (CGO_ENABLED=0), the same linux binary works
+# on both glibc and musl. Musllinux wheels reuse the linux binary but are
+# tagged differently so pip installs them on Alpine/musl systems.
+GO_PLATFORMS = \
+  linux/amd64 \
+  linux/arm64 \
+  linux/arm \
+  linux/386 \
+  linux/ppc64le \
+  linux/s390x \
+  darwin/amd64 \
+  darwin/arm64 \
+  windows/amd64 \
+  windows/arm64 \
+  windows/386
+
+# Build for the current platform (development).
+build-go:
+	@mkdir -p $(GO_BIN_DIR)
+	go build -ldflags "$(GO_LDFLAGS)" -o $(GO_BIN_DIR)/langgraph $(GO_BINARY)
+	@echo "Built $(GO_BIN_DIR)/langgraph"
+
+# Build for a single target: make build-go-target GOOS=linux GOARCH=amd64
+build-go-target:
+	$(eval EXT=$(if $(filter windows,$(GOOS)),.exe,))
+	@mkdir -p $(GO_BIN_DIR)
+	GOOS=$(GOOS) GOARCH=$(GOARCH) CGO_ENABLED=0 \
+		go build -ldflags "$(GO_LDFLAGS)" \
+		-o $(GO_BIN_DIR)/langgraph-$(GOOS)-$(GOARCH)$(EXT) $(GO_BINARY)
+	@echo "Built $(GO_BIN_DIR)/langgraph-$(GOOS)-$(GOARCH)$(EXT)"
+
+# Build for all platforms.
+build-go-all:
+	@mkdir -p $(GO_BIN_DIR)
+	@for platform in $(GO_PLATFORMS); do \
+		os=$${platform%/*}; arch=$${platform#*/}; \
+		ext=""; \
+		if [ "$$os" = "windows" ]; then ext=".exe"; fi; \
+		echo "Building $$os/$$arch..."; \
+		GOOS=$$os GOARCH=$$arch CGO_ENABLED=0 \
+			go build -ldflags "$(GO_LDFLAGS)" \
+			-o $(GO_BIN_DIR)/langgraph-$$os-$$arch$$ext $(GO_BINARY) || exit 1; \
+	done
+	@echo "All platforms built in $(GO_BIN_DIR)/"
+
+clean-go-bin:
+	rm -rf $(GO_BIN_DIR)
+
+######################
+# SCHEMA AND VERSIONING
+######################
+
 update-schema:
 	uv run python generate_schema.py

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"os"
+
+	"github.com/langchain-ai/langgraph/libs/cli/internal/root"
+)
+
+func main() {
+	os.Exit(root.Run(os.Args[1:], os.Stdout, os.Stderr))
+}
@@ -5,5 +5,5 @@ description = "Test for prerelease stuff"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-  "langchain-openai==1.1.14"
+  "langchain-openai==1.0.1"
 ]
@@ -5,7 +5,7 @@ description = "Test for prerelease stuff"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-  "langchain-openai==1.1.14",
+  "langchain-openai==1.0.0a2",
  "langchain-anthropic==1.0.0a5",
  "langgraph==1.1.5"
 ]
@@ -5,7 +5,7 @@ description = "Test for prerelease stuff"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
-  "langchain-openai==1.1.14",
+  "langchain-openai==1.0.0a2",
  "langgraph==1.1.2",
  "langchain_community>=0.3.0",
 ]
@@ -0,0 +1,3 @@
+module github.com/langchain-ai/langgraph/libs/cli
+
+go 1.23.0
@@ -0,0 +1,59 @@
+"""Hatch build hook that bundles the platform-specific Go binary into the wheel.
+
+Usage:
+  1. Cross-compile: make build-go-target GOOS=linux GOARCH=amd64
+  2. Set LANGGRAPH_GO_BINARY to the built binary path
+  3. Build wheel: uv build --wheel
+
+The hook copies the binary into langgraph_cli/bin/ so the entrypoint can find it.
+If LANGGRAPH_GO_BINARY is not set, the wheel is built without a binary (pure Python
+fallback — fine for development and the legacy code path).
+"""
+
+from __future__ import annotations
+
+import os
+import shutil
+import stat
+from pathlib import Path
+
+from hatchling.builders.hooks.plugin.interface import BuildHookInterface
+
+
+class GoBinaryBuildHook(BuildHookInterface):
+    PLUGIN_NAME = "go-binary"
+
+    def initialize(self, version: str, build_data: dict) -> None:
+        bin_dir = Path("langgraph_cli/bin")
+        if bin_dir.exists():
+            shutil.rmtree(bin_dir)
+
+        binary_path = os.environ.get("LANGGRAPH_GO_BINARY")
+        if not binary_path:
+            return
+
+        source = Path(binary_path)
+        if not source.is_file():
+            msg = f"LANGGRAPH_GO_BINARY points to missing file: {source}"
+            raise FileNotFoundError(msg)
+
+        bin_dir.mkdir(parents=True, exist_ok=True)
+
+        # Determine output name (langgraph or langgraph.exe)
+        dest_name = "langgraph.exe" if source.suffix == ".exe" else "langgraph"
+        dest = bin_dir / dest_name
+
+        shutil.copy2(str(source), str(dest))
+        # Ensure executable permission
+        dest.chmod(dest.stat().st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
+
+        # Tell hatch to include the binary in the wheel
+        build_data["shared_data"] = {}
+        build_data["force_include"] = {
+            str(dest): f"langgraph_cli/bin/{dest_name}",
+        }
+
+        # Set the platform tag so pip installs the right wheel
+        platform_tag = os.environ.get("LANGGRAPH_WHEEL_PLAT")
+        if platform_tag:
+            build_data["tag"] = f"py3-none-{platform_tag}"
@@ -0,0 +1,698 @@
+// Package config provides validation for langgraph.json configuration files.
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+const (
+	MinNodeVersion       = "20"
+	DefaultNodeVersion   = "20"
+	MinPythonVersion     = "3.11"
+	DefaultPythonVersion = "3.11"
+	DefaultImageDistro   = "debian"
+)
+
+var validDistros = []string{"debian", "wolfi", "bookworm"}
+
+var knownConfigKeys = map[string]bool{
+	"python_version":       true,
+	"node_version":         true,
+	"api_version":          true,
+	"base_image":           true,
+	"image_distro":         true,
+	"pip_config_file":      true,
+	"pip_installer":        true,
+	"source":               true,
+	"dependencies":         true,
+	"dockerfile_lines":     true,
+	"graphs":               true,
+	"env":                  true,
+	"store":                true,
+	"auth":                 true,
+	"encryption":           true,
+	"http":                 true,
+	"webhooks":             true,
+	"checkpointer":         true,
+	"ui":                   true,
+	"ui_config":            true,
+	"keep_pkg_tools":       true,
+	"_INTERNAL_docker_tag": true,
+	"project_root":         true,
+	"package":              true,
+}
+
+var nodeExtensions = map[string]bool{
+	".ts": true, ".mts": true, ".cts": true,
+	".js": true, ".mjs": true, ".cjs": true,
+}
+
+// isNodeGraph checks whether a graph spec refers to a Node.js file.
+func isNodeGraph(spec any) bool {
+	var filePath string
+	switch v := spec.(type) {
+	case string:
+		filePath = strings.SplitN(v, ":", 2)[0]
+	case map[string]any:
+		if p, _ := v["path"].(string); p != "" {
+			filePath = strings.SplitN(p, ":", 2)[0]
+		}
+	}
+	return nodeExtensions[filepath.Ext(filePath)]
+}
+
+// getSourceKind extracts source.kind from a raw config.
+func getSourceKind(raw map[string]any) string {
+	source, ok := raw["source"]
+	if !ok {
+		return ""
+	}
+	m, ok := source.(map[string]any)
+	if !ok {
+		return ""
+	}
+	kind, _ := m["kind"].(string)
+	return kind
+}
+
+// getString returns the string value for key, or "" if missing/wrong type.
+func getString(raw map[string]any, key string) string {
+	v, _ := raw[key].(string)
+	return v
+}
+
+// parseVersion parses "3.11" or "0.8.1" into integer parts.
+func parseVersion(s string) ([]int, error) {
+	s = strings.SplitN(s, "-", 2)[0]
+	parts := strings.Split(s, ".")
+	result := make([]int, len(parts))
+	for i, p := range parts {
+		n, err := strconv.Atoi(p)
+		if err != nil {
+			return nil, fmt.Errorf("invalid version part: %s", p)
+		}
+		result[i] = n
+	}
+	return result, nil
+}
+
+// versionLessThan returns true if a < b (component-wise).
+func versionLessThan(a, b []int) bool {
+	for i := 0; i < len(a) && i < len(b); i++ {
+		if a[i] < b[i] {
+			return true
+		}
+		if a[i] > b[i] {
+			return false
+		}
+	}
+	return len(a) < len(b)
+}
+
+// ValidateConfig validates a raw config map and returns a normalised copy.
+// Errors match the Python CLI's click.UsageError messages exactly.
+func ValidateConfig(raw map[string]any) (map[string]any, error) {
+	// --- detect graph types ---
+	graphs, _ := raw["graphs"].(map[string]any)
+	hasNode, hasPython := false, false
+	for _, spec := range graphs {
+		if isNodeGraph(spec) {
+			hasNode = true
+		} else {
+			hasPython = true
+		}
+	}
+
+	// --- version defaults ---
+	nodeVersion := getString(raw, "node_version")
+	pythonVersion := getString(raw, "python_version")
+
+	if hasNode && nodeVersion == "" {
+		nodeVersion = DefaultNodeVersion
+	}
+	if hasPython && pythonVersion == "" {
+		pythonVersion = DefaultPythonVersion
+	}
+
+	imageDistro := getString(raw, "image_distro")
+	if imageDistro == "" {
+		imageDistro = DefaultImageDistro
+	}
+
+	// --- mutual exclusion: _INTERNAL_docker_tag vs api_version ---
+	_, hasInternalTag := raw["_INTERNAL_docker_tag"]
+	_, hasAPIVersion := raw["api_version"]
+	if hasInternalTag && hasAPIVersion {
+		return nil, fmt.Errorf("Cannot specify both _INTERNAL_docker_tag and api_version.")
+	}
+
+	// --- api_version format ---
+	if apiVersion := getString(raw, "api_version"); apiVersion != "" {
+		base := strings.SplitN(apiVersion, "-", 2)[0]
+		parts := strings.Split(base, ".")
+		if len(parts) > 3 {
+			return nil, fmt.Errorf("Version must be major or major.minor or major.minor.patch.")
+		}
+		for _, p := range parts {
+			if _, err := strconv.Atoi(p); err != nil {
+				return nil, fmt.Errorf(
+					"Invalid version format: %s.\n\n"+
+						"Pin to a minor version, e.g.:\n"+
+						"  \"api_version\": \"0.8\"", apiVersion)
+			}
+		}
+	}
+
+	// --- build result config with defaults ---
+	config := map[string]any{
+		"node_version":     nodeVersion,
+		"python_version":   pythonVersion,
+		"pip_config_file":  raw["pip_config_file"],
+		"pip_installer":    "auto",
+		"source":           raw["source"],
+		"base_image":       raw["base_image"],
+		"image_distro":     imageDistro,
+		"dependencies":     raw["dependencies"],
+		"dockerfile_lines": raw["dockerfile_lines"],
+		"graphs":           raw["graphs"],
+		"env":              raw["env"],
+		"store":            raw["store"],
+		"auth":             raw["auth"],
+		"encryption":       raw["encryption"],
+		"http":             raw["http"],
+		"webhooks":         raw["webhooks"],
+		"checkpointer":     raw["checkpointer"],
+		"ui":               raw["ui"],
+		"ui_config":        raw["ui_config"],
+		"keep_pkg_tools":   raw["keep_pkg_tools"],
+	}
+	if raw["pip_installer"] != nil {
+		config["pip_installer"] = raw["pip_installer"]
+	}
+	if hasInternalTag {
+		config["_INTERNAL_docker_tag"] = raw["_INTERNAL_docker_tag"]
+	}
+	if hasAPIVersion {
+		config["api_version"] = raw["api_version"]
+	}
+
+	// Apply list defaults.
+	if config["dependencies"] == nil {
+		config["dependencies"] = []any{}
+	}
+	if config["dockerfile_lines"] == nil {
+		config["dockerfile_lines"] = []any{}
+	}
+	if config["graphs"] == nil {
+		config["graphs"] = map[string]any{}
+	}
+	if config["env"] == nil {
+		config["env"] = map[string]any{}
+	}
+
+	// --- node_version validation ---
+	if nodeVersion != "" {
+		if strings.Contains(nodeVersion, ".") {
+			return nil, fmt.Errorf("Node.js version must be major version only")
+		}
+		major, err := strconv.Atoi(nodeVersion)
+		if err != nil {
+			return nil, fmt.Errorf(
+				"Invalid Node.js version format: %s. Use major version only (e.g., '20').",
+				nodeVersion)
+		}
+		minMajor, _ := strconv.Atoi(MinNodeVersion)
+		if major < minMajor {
+			return nil, fmt.Errorf(
+				"Node.js version %s is not supported. "+
+					"Minimum required version is %s.\n\n"+
+					"Set node_version to %s or higher:\n"+
+					"  \"node_version\": \"%s\"",
+				nodeVersion, MinNodeVersion, MinNodeVersion, MinNodeVersion)
+		}
+	}
+
+	// --- pip_installer validation ---
+	if pi, ok := raw["pip_installer"].(string); ok {
+		switch pi {
+		case "auto", "pip", "uv":
+			// valid
+		default:
+			return nil, fmt.Errorf(
+				"Invalid pip_installer: '%s'. "+
+					"Consider using uv-based source management instead:\n\n"+
+					"  \"source\": {\"kind\": \"uv\", \"root\": \"..\"}",
+				pi)
+		}
+	}
+
+	// --- source validation ---
+	sourceKind := getSourceKind(raw)
+	if source := raw["source"]; source != nil {
+		if _, ok := source.(map[string]any); !ok {
+			return nil, fmt.Errorf(
+				"`source` must be an object, e.g.:\n" +
+					"  \"source\": {\"kind\": \"uv\", \"root\": \"..\"}")
+		}
+		if sourceKind != "uv" {
+			return nil, fmt.Errorf(
+				"Invalid source.kind. The only supported value is 'uv':\n" +
+					"  \"source\": {\"kind\": \"uv\", \"root\": \"..\"}")
+		}
+	}
+
+	// --- python_version validation ---
+	if pythonVersion != "" {
+		base := strings.SplitN(pythonVersion, "-", 2)[0]
+		dotParts := strings.Split(base, ".")
+		allDigits := true
+		for _, p := range dotParts {
+			if _, err := strconv.Atoi(p); err != nil {
+				allDigits = false
+				break
+			}
+		}
+		if len(dotParts) != 2 || !allDigits {
+			fix := MinPythonVersion
+			if len(dotParts) >= 2 {
+				fix = dotParts[0] + "." + dotParts[1]
+			}
+			return nil, fmt.Errorf(
+				"Invalid Python version format: %s. "+
+					"Use 'major.minor' format — patch version cannot be specified.\n\n"+
+					"  \"python_version\": \"%s\"",
+				pythonVersion, fix)
+		}
+		pyParsed, _ := parseVersion(pythonVersion)
+		minParsed, _ := parseVersion(MinPythonVersion)
+		if versionLessThan(pyParsed, minParsed) {
+			return nil, fmt.Errorf(
+				"Python version %s is not supported. "+
+					"Minimum required version is %s.\n\n"+
+					"  \"python_version\": \"%s\"",
+				pythonVersion, MinPythonVersion, MinPythonVersion)
+		}
+		if strings.Contains(pythonVersion, "bullseye") {
+			return nil, fmt.Errorf(
+				"Bullseye images were deprecated in version 0.4.13. " +
+					"Please use 'bookworm' or 'debian' instead.")
+		}
+
+		// dependencies required when not uv
+		deps, _ := config["dependencies"].([]any)
+		if sourceKind != "uv" && len(deps) == 0 {
+			return nil, fmt.Errorf(
+				"No dependencies found in config. " +
+					"Consider using uv-based source management:\n\n" +
+					"  \"source\": {\"kind\": \"uv\", \"root\": \"..\"}")
+		}
+	}
+
+	// --- graphs required ---
+	graphMap, _ := config["graphs"].(map[string]any)
+	if len(graphMap) == 0 {
+		return nil, fmt.Errorf(
+			"No graphs found in config. Add at least one graph, e.g.:\n" +
+				"  \"graphs\": {\n" +
+				"    \"agent\": \"./my_agent/graph.py:graph\"\n" +
+				"  }")
+	}
+
+	// --- image_distro validation ---
+	if imageDistro == "bullseye" {
+		return nil, fmt.Errorf(
+			"Bullseye images were deprecated in version 0.4.13. " +
+				"Please use 'bookworm' or 'debian' instead.")
+	}
+	validDistro := false
+	for _, d := range validDistros {
+		if imageDistro == d {
+			validDistro = true
+			break
+		}
+	}
+	if !validDistro {
+		quoted := make([]string, len(validDistros))
+		for i, d := range validDistros {
+			quoted[i] = fmt.Sprintf("'%s'", d)
+		}
+		return nil, fmt.Errorf(
+			"Invalid image_distro: '%s'. "+
+				"Must be one of: %s.\n\n"+
+				"  \"image_distro\": \"wolfi\"  (recommended)",
+			imageDistro, strings.Join(quoted, ", "))
+	}
+
+	// --- uv source mode validation ---
+	if sourceKind == "uv" {
+		var errs []string
+		if pythonVersion == "" {
+			errs = append(errs, "source.kind 'uv' requires `python_version` — it is a Python-only deployment mode. Node.js-only graphs are not supported.")
+		}
+
+		deps, _ := raw["dependencies"].([]any)
+		if deps != nil && len(deps) > 0 {
+			errs = append(errs, "Remove `dependencies` from your config. With `source.kind = \"uv\"`, all dependencies are read from your pyproject.toml and uv.lock instead.")
+		}
+		// Also check if dependencies key exists even if empty array.
+		if deps == nil {
+			if rawDeps, exists := raw["dependencies"]; exists && rawDeps != nil {
+				// dependencies key present but not an array — still flag it
+				if depsArr, ok := rawDeps.([]any); ok && len(depsArr) > 0 {
+					errs = append(errs, "Remove `dependencies` from your config. With `source.kind = \"uv\"`, all dependencies are read from your pyproject.toml and uv.lock instead.")
+				}
+			}
+		}
+
+		sourceMap, _ := raw["source"].(map[string]any)
+		if root, exists := sourceMap["root"]; exists {
+			rootStr, ok := root.(string)
+			if !ok {
+				errs = append(errs, fmt.Sprintf("`source.root` must be a string, got %T.", root))
+			} else if rootStr == "" {
+				errs = append(errs, "`source.root` must be a non-empty string. Use `\".\"`.")
+			}
+		}
+
+		if pkg, exists := sourceMap["package"]; exists {
+			if pkg != nil {
+				pkgStr, ok := pkg.(string)
+				if !ok {
+					errs = append(errs, "`source.package` must be a non-empty string.")
+				} else if pkgStr == "" {
+					errs = append(errs, "`source.package` must be a non-empty string.")
+				}
+			}
+		}
+
+		if len(errs) > 0 {
+			formatted := ""
+			for i, e := range errs {
+				formatted += fmt.Sprintf("\n  %d. %s", i+1, e)
+			}
+			return nil, fmt.Errorf(
+				"source.kind 'uv' requires a different config shape than dependency-based installs:%s",
+				formatted)
+		}
+	}
+
+	// --- legacy project_root / package ---
+	_, hasProjectRoot := raw["project_root"]
+	_, hasPackage := raw["package"]
+	if hasProjectRoot || hasPackage {
+		return nil, fmt.Errorf(
+			"Top-level `project_root` and `package` are no longer supported. " +
+				"Use `source.root` and `source.package` instead.")
+	}
+
+	// --- auth path validation ---
+	if auth, ok := raw["auth"].(map[string]any); ok {
+		if authPath, _ := auth["path"].(string); authPath != "" {
+			if !strings.Contains(authPath, ":") {
+				return nil, fmt.Errorf(
+					"Invalid auth.path format: '%s'. "+
+						"Must be in format './path/to/file.py:attribute_name'",
+					authPath)
+			}
+		}
+	}
+
+	// --- encryption path validation ---
+	if enc, ok := raw["encryption"].(map[string]any); ok {
+		if encPath, _ := enc["path"].(string); encPath != "" {
+			if !strings.Contains(encPath, ":") {
+				return nil, fmt.Errorf(
+					"Invalid encryption.path format: '%s'. "+
+						"Must be in format './path/to/file.py:attribute_name'",
+					encPath)
+			}
+		}
+	}
+
+	// --- http.app path validation ---
+	if httpConf, ok := raw["http"].(map[string]any); ok {
+		if app, _ := httpConf["app"].(string); app != "" {
+			if !strings.Contains(app, ":") {
+				return nil, fmt.Errorf(
+					"Invalid http.app format: '%s'. "+
+						"Must be in format './path/to/file.py:attribute_name'",
+					app)
+			}
+		}
+	}
+
+	// --- keep_pkg_tools validation ---
+	if kpt := raw["keep_pkg_tools"]; kpt != nil {
+		validBuildTools := map[string]bool{"pip": true, "setuptools": true, "wheel": true}
+		switch v := kpt.(type) {
+		case bool:
+			// ok
+		case []any:
+			for _, item := range v {
+				tool, ok := item.(string)
+				if !ok || !validBuildTools[tool] {
+					return nil, fmt.Errorf(
+						"Invalid keep_pkg_tools: '%v'. "+
+							"Must be one of 'pip', 'setuptools', 'wheel'.",
+						item)
+				}
+			}
+		default:
+			return nil, fmt.Errorf(
+				"Invalid keep_pkg_tools: '%v'. "+
+					"Must be bool or list[str] (with values 'pip', 'setuptools', and/or 'wheel').",
+				kpt)
+		}
+	}
+
+	return config, nil
+}
+
+// ValidateConfigFile loads a config file, validates it, and returns the result.
+func ValidateConfigFile(configPath string) (map[string]any, error) {
+	raw, err := LoadRawConfigFile(configPath)
+	if err != nil {
+		return nil, err
+	}
+
+	return validateConfigFile(configPath, raw)
+}
+
+// LoadRawConfigFile loads a config file and requires the top-level JSON value
+// to be an object.
+func LoadRawConfigFile(configPath string) (map[string]any, error) {
+	data, err := os.ReadFile(configPath)
+	if err != nil {
+		return nil, fmt.Errorf("could not read config file: %w", err)
+	}
+
+	var rawAny any
+	if err := json.Unmarshal(data, &rawAny); err != nil {
+		return nil, fmt.Errorf("Invalid JSON in %s: %s", configPath, err.Error())
+	}
+
+	raw, ok := rawAny.(map[string]any)
+	if !ok {
+		return nil, fmt.Errorf(
+			"Invalid config in %s: top-level JSON value must be an object.",
+			configPath,
+		)
+	}
+
+	return raw, nil
+}
+
+func validateConfigFile(configPath string, raw map[string]any) (map[string]any, error) {
+	validated, err := ValidateConfig(raw)
+	if err != nil {
+		return nil, err
+	}
+
+	// Check package.json node version if node_version is set.
+	if nv, _ := validated["node_version"].(string); nv != "" {
+		dir := filepath.Dir(configPath)
+		pkgJSONPath := filepath.Join(dir, "package.json")
+		if info, statErr := os.Stat(pkgJSONPath); statErr == nil && !info.IsDir() {
+			if pkgErr := validatePackageJSON(pkgJSONPath); pkgErr != nil {
+				return nil, pkgErr
+			}
+		}
+	}
+
+	return validated, nil
+}
+
+func validatePackageJSON(path string) error {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil
+	}
+
+	var pkg map[string]any
+	if err := json.Unmarshal(data, &pkg); err != nil {
+		return fmt.Errorf(
+			"Invalid package.json found in langgraph config directory %s: file is not valid JSON",
+			path,
+		)
+	}
+
+	enginesRaw, ok := pkg["engines"]
+	if !ok {
+		return nil
+	}
+	engines, ok := enginesRaw.(map[string]any)
+	if !ok {
+		return nil
+	}
+
+	for k := range engines {
+		if k != "node" {
+			keys := make([]string, 0, len(engines))
+			for ek := range engines {
+				keys = append(keys, ek)
+			}
+			return fmt.Errorf(
+				"Only 'node' engine is supported in package.json engines. Got engines: %v",
+				keys)
+		}
+	}
+
+	if nodeVer, ok := engines["node"].(string); ok && nodeVer != "" {
+		if strings.Contains(nodeVer, ".") {
+			return fmt.Errorf(
+				"Node.js version in package.json engines must be >= %s "+
+					"(major version only), got '%s'. "+
+					"Minor/patch versions (like '20.x.y') are not supported to "+
+					"prevent deployment issues when new Node.js versions are released.",
+				MinNodeVersion, nodeVer)
+		}
+		major, err := strconv.Atoi(nodeVer)
+		if err == nil {
+			minMajor, _ := strconv.Atoi(MinNodeVersion)
+			if major < minMajor {
+				return fmt.Errorf(
+					"Node.js version in package.json engines must be >= %s "+
+						"(major version only), got '%s'. "+
+						"Minor/patch versions (like '20.x.y') are not supported to "+
+						"prevent deployment issues when new Node.js versions are released.",
+					MinNodeVersion, nodeVer)
+			}
+		}
+	}
+
+	return nil
+}
+
+// GetUnknownKeys returns warnings for unrecognised top-level keys.
+func GetUnknownKeys(raw map[string]any) []string {
+	var unknown []string
+	for k := range raw {
+		if !knownConfigKeys[k] {
+			unknown = append(unknown, k)
+		}
+	}
+	sortStrings(unknown)
+
+	var warnings []string
+	knownList := make([]string, 0, len(knownConfigKeys))
+	for k := range knownConfigKeys {
+		knownList = append(knownList, k)
+	}
+
+	for _, key := range unknown {
+		if close := closestMatch(key, knownList); close != "" {
+			warnings = append(warnings, fmt.Sprintf("Unknown key '%s' — did you mean '%s'?", key, close))
+		} else {
+			warnings = append(warnings, fmt.Sprintf("Unknown key '%s' is not a recognized config field.", key))
+		}
+	}
+	return warnings
+}
+
+// closestMatch finds the best match for word among candidates using edit distance.
+// Returns "" if no match is close enough (ratio >= 0.6).
+func closestMatch(word string, candidates []string) string {
+	best := ""
+	bestRatio := 0.6 // minimum threshold
+	for _, c := range candidates {
+		ratio := similarity(word, c)
+		if ratio > bestRatio {
+			bestRatio = ratio
+			best = c
+		}
+	}
+	return best
+}
+
+// similarity returns a ratio in [0,1] based on Levenshtein distance.
+func similarity(a, b string) float64 {
+	maxLen := len(a)
+	if len(b) > maxLen {
+		maxLen = len(b)
+	}
+	if maxLen == 0 {
+		return 1.0
+	}
+	dist := editDistance(a, b)
+	return 1.0 - float64(dist)/float64(maxLen)
+}
+
+// editDistance computes Levenshtein distance between two strings.
+func editDistance(a, b string) int {
+	la, lb := len(a), len(b)
+	if la == 0 {
+		return lb
+	}
+	if lb == 0 {
+		return la
+	}
+
+	prev := make([]int, lb+1)
+	curr := make([]int, lb+1)
+
+	for j := 0; j <= lb; j++ {
+		prev[j] = j
+	}
+	for i := 1; i <= la; i++ {
+		curr[0] = i
+		for j := 1; j <= lb; j++ {
+			cost := 1
+			if a[i-1] == b[j-1] {
+				cost = 0
+			}
+			ins := curr[j-1] + 1
+			del := prev[j] + 1
+			sub := prev[j-1] + cost
+			curr[j] = min3(ins, del, sub)
+		}
+		prev, curr = curr, prev
+	}
+	return prev[lb]
+}
+
+func min3(a, b, c int) int {
+	if a < b {
+		if a < c {
+			return a
+		}
+		return c
+	}
+	if b < c {
+		return b
+	}
+	return c
+}
+
+// sortStrings sorts a slice of strings in place (simple insertion sort, fine for small n).
+func sortStrings(s []string) {
+	for i := 1; i < len(s); i++ {
+		for j := i; j > 0 && s[j] < s[j-1]; j-- {
+			s[j], s[j-1] = s[j-1], s[j]
+		}
+	}
+}
@@ -0,0 +1,568 @@
+package config
+
+import (
+	"strings"
+	"testing"
+)
+
+// baseConfig returns a minimal valid config map. Tests should copy and modify it.
+func baseConfig() map[string]any {
+	return map[string]any{
+		"dependencies": []any{"langchain"},
+		"graphs":       map[string]any{"agent": "./agent.py:graph"},
+	}
+}
+
+// copyMap returns a shallow copy of m.
+func copyMap(m map[string]any) map[string]any {
+	out := make(map[string]any, len(m))
+	for k, v := range m {
+		out[k] = v
+	}
+	return out
+}
+
+// mustSucceed is a test helper that fails if err is non-nil.
+func mustSucceed(t *testing.T, err error) {
+	t.Helper()
+	if err != nil {
+		t.Fatalf("expected success but got error: %v", err)
+	}
+}
+
+// mustFail is a test helper that fails if err is nil.
+func mustFail(t *testing.T, err error) {
+	t.Helper()
+	if err == nil {
+		t.Fatal("expected error but got nil")
+	}
+}
+
+// mustContain checks that err is non-nil and its message contains substr.
+func mustContain(t *testing.T, err error, substr string) {
+	t.Helper()
+	if err == nil {
+		t.Fatalf("expected error containing %q but got nil", substr)
+	}
+	if !strings.Contains(err.Error(), substr) {
+		t.Fatalf("expected error to contain %q, got: %s", substr, err.Error())
+	}
+}
+
+func TestValidateConfigValid(t *testing.T) {
+	t.Run("minimal config", func(t *testing.T) {
+		raw := baseConfig()
+		result, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+
+		if pv, _ := result["python_version"].(string); pv != "3.11" {
+			t.Fatalf("expected python_version '3.11', got %q", pv)
+		}
+		if id, _ := result["image_distro"].(string); id != "debian" {
+			t.Fatalf("expected image_distro 'debian', got %q", id)
+		}
+	})
+
+	t.Run("full config with all optional fields", func(t *testing.T) {
+		raw := map[string]any{
+			"python_version":   "3.12",
+			"image_distro":     "wolfi",
+			"pip_installer":    "uv",
+			"dependencies":     []any{"langchain", "langgraph"},
+			"graphs":           map[string]any{"agent": "./agent.py:graph"},
+			"env":              map[string]any{"FOO": "bar"},
+			"dockerfile_lines": []any{"RUN apt-get update"},
+			"auth":             map[string]any{"path": "./auth.py:handler"},
+			"encryption":       map[string]any{"path": "./enc.py:enc"},
+			"http":             map[string]any{"app": "./app.py:app"},
+			"keep_pkg_tools":   true,
+			"api_version":      "0.8",
+		}
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+}
+
+func TestValidateConfigPythonVersion(t *testing.T) {
+	validVersions := []string{"3.11", "3.12", "3.13"}
+	for _, v := range validVersions {
+		t.Run("valid "+v, func(t *testing.T) {
+			raw := copyMap(baseConfig())
+			raw["python_version"] = v
+			_, err := ValidateConfig(raw)
+			mustSucceed(t, err)
+		})
+	}
+
+	t.Run("valid 3.12-slim suffix stripped", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["python_version"] = "3.12-slim"
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	tooOld := []string{"3.10", "3.9"}
+	for _, v := range tooOld {
+		t.Run("too old "+v, func(t *testing.T) {
+			raw := copyMap(baseConfig())
+			raw["python_version"] = v
+			_, err := ValidateConfig(raw)
+			mustContain(t, err, "Minimum required version")
+		})
+	}
+
+	badFormat := []struct {
+		version string
+	}{
+		{"3.11.0"},
+		{"3"},
+		{"abc.def"},
+	}
+	for _, tc := range badFormat {
+		t.Run("bad format "+tc.version, func(t *testing.T) {
+			raw := copyMap(baseConfig())
+			raw["python_version"] = tc.version
+			_, err := ValidateConfig(raw)
+			mustContain(t, err, "Invalid Python version format")
+		})
+	}
+}
+
+func TestValidateConfigNodeVersion(t *testing.T) {
+	// Need a node graph to trigger node_version validation
+	nodeBase := func() map[string]any {
+		return map[string]any{
+			"dependencies": []any{"langchain"},
+			"graphs":       map[string]any{"agent": "./agent.py:graph"},
+		}
+	}
+
+	t.Run("valid 20", func(t *testing.T) {
+		raw := nodeBase()
+		raw["node_version"] = "20"
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("valid 22", func(t *testing.T) {
+		raw := nodeBase()
+		raw["node_version"] = "22"
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("too old 18", func(t *testing.T) {
+		raw := nodeBase()
+		raw["node_version"] = "18"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Minimum required version is 20")
+	})
+
+	t.Run("minor version 20.1", func(t *testing.T) {
+		raw := nodeBase()
+		raw["node_version"] = "20.1"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "major version only")
+	})
+}
+
+func TestValidateConfigGraphs(t *testing.T) {
+	t.Run("empty graphs", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["graphs"] = map[string]any{}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "No graphs found")
+	})
+
+	t.Run("missing graphs key", func(t *testing.T) {
+		raw := map[string]any{
+			"dependencies": []any{"langchain"},
+		}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "No graphs found")
+	})
+}
+
+func TestValidateConfigImageDistro(t *testing.T) {
+	validDistroTests := []string{"debian", "wolfi", "bookworm"}
+	for _, d := range validDistroTests {
+		t.Run("valid "+d, func(t *testing.T) {
+			raw := copyMap(baseConfig())
+			raw["image_distro"] = d
+			_, err := ValidateConfig(raw)
+			mustSucceed(t, err)
+		})
+	}
+
+	t.Run("bullseye deprecated", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["image_distro"] = "bullseye"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "deprecated")
+	})
+
+	t.Run("invalid ubuntu", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["image_distro"] = "ubuntu"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid image_distro")
+	})
+
+	t.Run("invalid alpine", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["image_distro"] = "alpine"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid image_distro")
+	})
+
+	t.Run("default is debian", func(t *testing.T) {
+		raw := baseConfig()
+		// no image_distro key
+		result, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+		if id, _ := result["image_distro"].(string); id != "debian" {
+			t.Fatalf("expected default image_distro 'debian', got %q", id)
+		}
+	})
+}
+
+func TestValidateConfigPipInstaller(t *testing.T) {
+	valid := []string{"auto", "pip", "uv"}
+	for _, pi := range valid {
+		t.Run("valid "+pi, func(t *testing.T) {
+			raw := copyMap(baseConfig())
+			raw["pip_installer"] = pi
+			_, err := ValidateConfig(raw)
+			mustSucceed(t, err)
+		})
+	}
+
+	invalid := []string{"conda", "uv_lock"}
+	for _, pi := range invalid {
+		t.Run("invalid "+pi, func(t *testing.T) {
+			raw := copyMap(baseConfig())
+			raw["pip_installer"] = pi
+			_, err := ValidateConfig(raw)
+			mustContain(t, err, "Invalid pip_installer")
+		})
+	}
+}
+
+func TestValidateConfigSource(t *testing.T) {
+	t.Run("valid uv source with root", func(t *testing.T) {
+		raw := map[string]any{
+			"python_version": "3.12",
+			"graphs":         map[string]any{"agent": "./agent.py:graph"},
+			"source":         map[string]any{"kind": "uv", "root": "../.."},
+		}
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("invalid source kind poetry", func(t *testing.T) {
+		raw := map[string]any{
+			"python_version": "3.12",
+			"graphs":         map[string]any{"agent": "./agent.py:graph"},
+			"source":         map[string]any{"kind": "poetry"},
+		}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid source.kind")
+	})
+
+	t.Run("source as string not object", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["source"] = "not-an-object"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "`source` must be an object")
+	})
+
+	t.Run("uv source with dependencies", func(t *testing.T) {
+		raw := map[string]any{
+			"python_version": "3.12",
+			"graphs":         map[string]any{"agent": "./agent.py:graph"},
+			"source":         map[string]any{"kind": "uv", "root": ".."},
+			"dependencies":   []any{"langchain"},
+		}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Remove `dependencies`")
+	})
+
+	t.Run("uv source with root as number", func(t *testing.T) {
+		raw := map[string]any{
+			"python_version": "3.12",
+			"graphs":         map[string]any{"agent": "./agent.py:graph"},
+			"source":         map[string]any{"kind": "uv", "root": 123},
+		}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "source.root` must be a string")
+	})
+
+	t.Run("uv source with package as number", func(t *testing.T) {
+		raw := map[string]any{
+			"python_version": "3.12",
+			"graphs":         map[string]any{"agent": "./agent.py:graph"},
+			"source":         map[string]any{"kind": "uv", "root": "..", "package": 123},
+		}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "source.package` must be a non-empty string")
+	})
+}
+
+func TestValidateConfigAPIVersion(t *testing.T) {
+	t.Run("valid 0.8", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["api_version"] = "0.8"
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("valid 0.8.1", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["api_version"] = "0.8.1"
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("invalid abc", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["api_version"] = "abc"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid version format")
+	})
+
+	t.Run("invalid 1.2.3.4 too many parts", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["api_version"] = "1.2.3.4"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "major or major.minor")
+	})
+}
+
+func TestValidateConfigMutualExclusion(t *testing.T) {
+	t.Run("both _INTERNAL_docker_tag and api_version", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["_INTERNAL_docker_tag"] = "some-tag"
+		raw["api_version"] = "0.8"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Cannot specify both")
+	})
+}
+
+func TestValidateConfigAuthPath(t *testing.T) {
+	t.Run("valid auth path with colon", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["auth"] = map[string]any{"path": "./auth.py:handler"}
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("invalid auth path without colon", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["auth"] = map[string]any{"path": "../../examples/my_app.py"}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid auth.path format")
+	})
+}
+
+func TestValidateConfigEncryptionPath(t *testing.T) {
+	t.Run("valid encryption path with colon", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["encryption"] = map[string]any{"path": "./enc.py:enc"}
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("invalid encryption path without colon", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["encryption"] = map[string]any{"path": "./enc.py"}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid encryption.path format")
+	})
+}
+
+func TestValidateConfigHTTPApp(t *testing.T) {
+	t.Run("valid http app with colon", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["http"] = map[string]any{"app": "./app.py:app"}
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("invalid http app without colon", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["http"] = map[string]any{"app": "./app.py"}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid http.app format")
+	})
+}
+
+func TestValidateConfigKeepPkgTools(t *testing.T) {
+	t.Run("bool true", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["keep_pkg_tools"] = true
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("valid list", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["keep_pkg_tools"] = []any{"pip", "wheel"}
+		_, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+	})
+
+	t.Run("invalid list item", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["keep_pkg_tools"] = []any{"invalid"}
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid keep_pkg_tools")
+	})
+
+	t.Run("invalid string type", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["keep_pkg_tools"] = "string"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "Invalid keep_pkg_tools")
+	})
+}
+
+func TestValidateConfigLegacyKeys(t *testing.T) {
+	t.Run("project_root legacy", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["project_root"] = ".."
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "no longer supported")
+	})
+
+	t.Run("package legacy", func(t *testing.T) {
+		raw := copyMap(baseConfig())
+		raw["package"] = "foo"
+		_, err := ValidateConfig(raw)
+		mustContain(t, err, "no longer supported")
+	})
+}
+
+func TestValidateConfigNodeGraphDetection(t *testing.T) {
+	t.Run("ts extension auto-sets node_version", func(t *testing.T) {
+		raw := map[string]any{
+			"dependencies": []any{"langchain"},
+			"graphs":       map[string]any{"agent": "./agent.py:graph", "bot": "./bot.ts:bot"},
+		}
+		result, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+		if nv, _ := result["node_version"].(string); nv != "20" {
+			t.Fatalf("expected node_version '20', got %q", nv)
+		}
+	})
+
+	t.Run("js extension auto-sets node_version", func(t *testing.T) {
+		raw := map[string]any{
+			"dependencies": []any{"langchain"},
+			"graphs":       map[string]any{"agent": "./agent.py:graph", "bot": "./bot.js:bot"},
+		}
+		result, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+		if nv, _ := result["node_version"].(string); nv != "20" {
+			t.Fatalf("expected node_version '20', got %q", nv)
+		}
+	})
+
+	t.Run("py extension does not set node_version", func(t *testing.T) {
+		raw := baseConfig()
+		result, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+		if nv, _ := result["node_version"].(string); nv != "" {
+			t.Fatalf("expected node_version '', got %q", nv)
+		}
+	})
+}
+
+func TestGetUnknownKeys(t *testing.T) {
+	t.Run("typo suggests correction", func(t *testing.T) {
+		raw := map[string]any{
+			"grpahs":       map[string]any{"agent": "./agent.py:graph"},
+			"dependencies": []any{"langchain"},
+		}
+		warnings := GetUnknownKeys(raw)
+		found := false
+		for _, w := range warnings {
+			if strings.Contains(w, "did you mean 'graphs'") {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Fatalf("expected warning suggesting 'graphs', got: %v", warnings)
+		}
+	})
+
+	t.Run("totally unknown key", func(t *testing.T) {
+		raw := map[string]any{
+			"totally_unknown": "value",
+			"graphs":          map[string]any{"agent": "./agent.py:graph"},
+			"dependencies":    []any{"langchain"},
+		}
+		warnings := GetUnknownKeys(raw)
+		found := false
+		for _, w := range warnings {
+			if strings.Contains(w, "not a recognized config field") {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Fatalf("expected 'not a recognized config field' warning, got: %v", warnings)
+		}
+	})
+
+	t.Run("only known keys gives no warnings", func(t *testing.T) {
+		raw := baseConfig()
+		warnings := GetUnknownKeys(raw)
+		if len(warnings) != 0 {
+			t.Fatalf("expected no warnings, got: %v", warnings)
+		}
+	})
+}
+
+func TestValidateConfigMultiplatform(t *testing.T) {
+	t.Run("only JS graphs", func(t *testing.T) {
+		raw := map[string]any{
+			"graphs": map[string]any{"bot": "./bot.ts:bot"},
+		}
+		result, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+		if nv, _ := result["node_version"].(string); nv != "20" {
+			t.Fatalf("expected node_version '20', got %q", nv)
+		}
+		if pv, _ := result["python_version"].(string); pv != "" {
+			t.Fatalf("expected python_version '', got %q", pv)
+		}
+	})
+
+	t.Run("only Python graphs", func(t *testing.T) {
+		raw := baseConfig()
+		result, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+		if pv, _ := result["python_version"].(string); pv != "3.11" {
+			t.Fatalf("expected python_version '3.11', got %q", pv)
+		}
+		if nv, _ := result["node_version"].(string); nv != "" {
+			t.Fatalf("expected node_version '', got %q", nv)
+		}
+	})
+
+	t.Run("mixed graphs", func(t *testing.T) {
+		raw := map[string]any{
+			"dependencies": []any{"langchain"},
+			"graphs":       map[string]any{"agent": "./agent.py:graph", "bot": "./bot.ts:bot"},
+		}
+		result, err := ValidateConfig(raw)
+		mustSucceed(t, err)
+		if pv, _ := result["python_version"].(string); pv != "3.11" {
+			t.Fatalf("expected python_version '3.11', got %q", pv)
+		}
+		if nv, _ := result["node_version"].(string); nv != "20" {
+			t.Fatalf("expected node_version '20', got %q", nv)
+		}
+	})
+}
@@ -0,0 +1,804 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+// ---------------------------------------------------------------------------
+// Helper: write a uv-lock workspace fixture
+// ---------------------------------------------------------------------------
+
+type workspaceOpts struct {
+	// Relative directory (within project_root) that holds langgraph.json.
+	// Default: "deploy/agent"
+	configRelativeDir string
+	// Extra TOML appended to the root pyproject.toml (e.g. [tool.uv.sources]).
+	rootSources string
+	// Extra TOML appended to the agent pyproject.toml (e.g. [tool.uv.sources]).
+	agentSources string
+	// Extra TOML appended to the shared lib pyproject.toml (e.g. [tool.uv] section).
+	sharedUvConfig string
+	// Custom agent dependencies list.  When nil the default is used.
+	agentDependencies []string
+	// Additional files to create: relative-path (from project_root) -> content.
+	extraFiles map[string]string
+}
+
+// writeUvLockWorkspace creates the standard multi-package uv workspace used
+// by the Python test_config_to_docker_uv_lock* test suite and returns
+// (projectRoot, configPath).
+//
+// Layout:
+//
+//	workspace/
+//	  pyproject.toml          [project] name="workspace-root" + [tool.uv.workspace]
+//	  uv.lock
+//	  apps/agent/             package "agent"
+//	    pyproject.toml
+//	    src/agent/graph.py
+//	  libs/shared/            package "shared"
+//	    pyproject.toml
+//	    src/shared/auth.py
+//	  libs/extra/             package "extra" (not a dep of agent)
+//	    pyproject.toml
+//	    src/extra/graph.py
+//	  deploy/agent/           config directory (configRelativeDir)
+//	    langgraph.json
+func writeUvLockWorkspace(t *testing.T, opts workspaceOpts) (string, string) {
+	t.Helper()
+	base := t.TempDir()
+	projectRoot := filepath.Join(base, "workspace")
+
+	configRelDir := opts.configRelativeDir
+	if configRelDir == "" {
+		configRelDir = "deploy/agent"
+	}
+
+	configDir := filepath.Join(projectRoot, configRelDir)
+	sharedDir := filepath.Join(projectRoot, "libs", "shared")
+	extraDir := filepath.Join(projectRoot, "libs", "extra")
+	deployDir := filepath.Join(projectRoot, "deploy", "agent")
+
+	for _, d := range []string{configDir, sharedDir, extraDir, deployDir} {
+		if err := os.MkdirAll(d, 0o755); err != nil {
+			t.Fatalf("MkdirAll(%q): %v", d, err)
+		}
+	}
+
+	// -- root pyproject.toml -------------------------------------------------
+	rootSources := opts.rootSources
+	writeFile(t, filepath.Join(projectRoot, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"workspace-root\"\n"+
+			"version = \"0.1.0\"\n"+
+			"\n"+
+			"[tool.uv.workspace]\n"+
+			"members = [\"apps/*\", \"libs/*\"]\n"+
+			"\n"+
+			rootSources+"\n"+
+			"\n"+
+			"[build-system]\n"+
+			"requires = [\"setuptools>=61\"]\n"+
+			"build-backend = \"setuptools.build_meta\"\n")
+
+	// -- uv.lock -------------------------------------------------------------
+	writeFile(t, filepath.Join(projectRoot, "uv.lock"), "# uv lock file\n")
+
+	// -- agent pyproject.toml ------------------------------------------------
+	agentDir := filepath.Join(projectRoot, "apps", "agent")
+	if err := os.MkdirAll(agentDir, 0o755); err != nil {
+		t.Fatalf("MkdirAll: %v", err)
+	}
+
+	agentDeps := opts.agentDependencies
+	if agentDeps == nil {
+		agentDeps = []string{"shared", "httpx>=0.28"}
+	}
+	depsList := "[\"" + strings.Join(agentDeps, "\", \"") + "\"]"
+
+	agentSources := opts.agentSources
+	writeFile(t, filepath.Join(agentDir, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"agent\"\n"+
+			"version = \"0.1.0\"\n"+
+			"dependencies = "+depsList+"\n"+
+			"\n"+
+			agentSources+"\n"+
+			"\n"+
+			"[build-system]\n"+
+			"requires = [\"setuptools>=61\"]\n"+
+			"build-backend = \"setuptools.build_meta\"\n")
+
+	// -- shared pyproject.toml -----------------------------------------------
+	sharedUvConfig := opts.sharedUvConfig
+	writeFile(t, filepath.Join(sharedDir, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"shared\"\n"+
+			"version = \"0.1.0\"\n"+
+			"dependencies = [\"anyio>=4\"]\n"+
+			"\n"+
+			sharedUvConfig+"\n"+
+			"\n"+
+			"[build-system]\n"+
+			"requires = [\"setuptools>=61\"]\n"+
+			"build-backend = \"setuptools.build_meta\"\n")
+
+	// -- extra pyproject.toml ------------------------------------------------
+	writeFile(t, filepath.Join(extraDir, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"extra\"\n"+
+			"version = \"0.1.0\"\n"+
+			"\n"+
+			"[build-system]\n"+
+			"requires = [\"setuptools>=61\"]\n"+
+			"build-backend = \"setuptools.build_meta\"\n")
+
+	// -- source files --------------------------------------------------------
+	writeFile(t, filepath.Join(agentDir, "src", "agent", "graph.py"), "")
+	writeFile(t, filepath.Join(sharedDir, "src", "shared", "auth.py"), "")
+	writeFile(t, filepath.Join(extraDir, "src", "extra", "graph.py"), "")
+
+	// -- config file ---------------------------------------------------------
+	configPath := filepath.Join(deployDir, "langgraph.json")
+	writeFile(t, configPath, "{}\n")
+
+	// If configRelativeDir is non-default, also place langgraph.json there.
+	if configRelDir != "deploy/agent" {
+		altConfigPath := filepath.Join(configDir, "langgraph.json")
+		writeFile(t, altConfigPath, "{}\n")
+		configPath = altConfigPath
+	}
+
+	// -- extra files ---------------------------------------------------------
+	for relPath, content := range opts.extraFiles {
+		writeFile(t, filepath.Join(projectRoot, relPath), content)
+	}
+
+	return projectRoot, configPath
+}
+
+// ---------------------------------------------------------------------------
+// Tests
+// ---------------------------------------------------------------------------
+
+func TestUvLockBasic(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentSources: "[tool.uv.sources]\nshared = { workspace = true }",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+		"auth":   map[string]any{"path": "../../libs/shared/src/shared/auth.py:create_auth"},
+	})
+
+	docker, contexts, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	// Core commands.
+	assertContains(t, docker, "uv pip install --system")
+	assertContains(t, docker,
+		"uv export --package 'agent' --frozen --no-hashes --no-emit-project --no-emit-workspace")
+
+	// Copy project metadata for uv export.
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root pyproject.toml /tmp/uv_export/project/pyproject.toml")
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root uv.lock /tmp/uv_export/project/uv.lock")
+
+	// Additional build contexts.
+	if _, ok := contexts["uv-workspace-root"]; !ok {
+		t.Fatal("expected 'uv-workspace-root' in additional contexts")
+	}
+
+	// Workspace packages copied.
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root apps/agent /deps/workspace/apps/agent")
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root libs/shared /deps/workspace/libs/shared")
+	// Unrelated member NOT copied.
+	assertNotContains(t, docker,
+		"libs/extra /deps/workspace/libs/extra")
+
+	// Install order: shared before agent.
+	assertContains(t, docker, "WORKDIR /deps/workspace/libs/shared")
+	assertContains(t, docker, "WORKDIR /deps/workspace/apps/agent")
+	sharedInstall := "uv pip install --system --no-cache-dir -c /api/constraints.txt --no-deps -e ."
+	assertContains(t, docker, sharedInstall)
+
+	// Ordering: shared COPY < shared WORKDIR < agent COPY < agent WORKDIR.
+	sharedCopy := "COPY --from=uv-workspace-root libs/shared /deps/workspace/libs/shared"
+	sharedWD := "WORKDIR /deps/workspace/libs/shared"
+	agentCopy := "COPY --from=uv-workspace-root apps/agent /deps/workspace/apps/agent"
+	agentWD := "WORKDIR /deps/workspace/apps/agent"
+	if strings.Index(docker, sharedCopy) >= strings.Index(docker, sharedWD) {
+		t.Error("shared COPY should appear before shared WORKDIR")
+	}
+	if strings.Index(docker, sharedWD) >= strings.Index(docker, agentCopy) {
+		t.Error("shared WORKDIR should appear before agent COPY")
+	}
+	if strings.Index(docker, sharedWD) >= strings.Index(docker, agentWD) {
+		t.Error("shared WORKDIR should appear before agent WORKDIR")
+	}
+
+	// No legacy dep-loop patterns.
+	assertNotContains(t, docker, "for dep in /deps/*")
+	assertNotContains(t, docker, "# -- Installing workspace packages --")
+	assertContains(t, docker, "WORKDIR /tmp/uv_export/project")
+	assertNotContains(t, docker, "RUN cd ")
+
+	// Rewritten paths in env vars (Go JSON uses compact format without spaces).
+	assertContains(t, docker,
+		`"/deps/workspace/libs/shared/src/shared/auth.py:create_auth"`)
+	assertContains(t, docker,
+		`"/deps/workspace/apps/agent/src/agent/graph.py:graph"`)
+
+	// Cleanup.
+	assertContains(t, docker, "rm /usr/bin/uv /usr/bin/uvx")
+}
+
+func TestUvLockHonorsRootWorkspaceSources(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		rootSources: "[tool.uv.sources]\nshared = { workspace = true }",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+		"auth":   map[string]any{"path": "../../libs/shared/src/shared/auth.py:create_auth"},
+	})
+
+	docker, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root libs/shared /deps/workspace/libs/shared")
+	assertContains(t, docker,
+		`"/deps/workspace/libs/shared/src/shared/auth.py:create_auth"`)
+}
+
+func TestUvLockIgnoresUnrelatedWorkspacePackageSources(t *testing.T) {
+	projectRoot, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentSources: "[tool.uv.sources]\nshared = { workspace = true }",
+	})
+
+	// Add badlib with [tool.uv.sources] pointing outside (an unrelated member).
+	badlibDir := filepath.Join(projectRoot, "libs", "badlib")
+	writeFile(t, filepath.Join(badlibDir, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"badlib\"\n"+
+			"version = \"0.1.0\"\n"+
+			"\n"+
+			"[tool.uv.sources]\n"+
+			"outside = { path = \"../outside\" }\n"+
+			"\n"+
+			"[build-system]\n"+
+			"requires = [\"setuptools>=61\"]\n"+
+			"build-backend = \"setuptools.build_meta\"\n")
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+		"auth":   map[string]any{"path": "../../libs/shared/src/shared/auth.py:create_auth"},
+	})
+
+	docker, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root libs/shared /deps/workspace/libs/shared")
+	assertNotContains(t, docker,
+		"COPY --from=uv-workspace-root libs/badlib /deps/workspace/libs/badlib")
+}
+
+func TestUvLockIgnoresUnrelatedRootSources(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		rootSources: "[tool.uv.sources]\nshared = { workspace = true }\nunused = { path = \"libs/extra\", editable = true }",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+		"auth":   map[string]any{"path": "../../libs/shared/src/shared/auth.py:create_auth"},
+	})
+
+	docker, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root libs/shared /deps/workspace/libs/shared")
+	assertNotContains(t, docker,
+		"COPY --from=uv-workspace-root libs/extra /deps/workspace/libs/extra")
+}
+
+func TestUvLockValidatesRootPathSourcesRelativeToProjectRoot(t *testing.T) {
+	projectRoot, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		rootSources: "[tool.uv.sources]\nshared = { path = \"../outside\", editable = true }",
+	})
+
+	// Create the outside directory the source points to.
+	outsideDir := filepath.Join(filepath.Dir(projectRoot), "outside")
+	writeFile(t, filepath.Join(outsideDir, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"shared\"\n"+
+			"version = \"0.1.0\"\n")
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error for path outside project_root")
+	}
+	assertContains(t, err.Error(), "outside project_root")
+}
+
+func TestUvLockRequiresExplicitWorkspaceSources(t *testing.T) {
+	// No agent_sources or root_sources => shared is NOT a workspace dep.
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+		"auth":   map[string]any{"path": "../../libs/shared/src/shared/auth.py:create_auth"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error because shared is not an explicit workspace source")
+	}
+	assertContains(t, err.Error(), "not inside the target package 'agent'")
+}
+
+func TestUvLockAcceptsPathWorkspaceSources(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentSources: "[tool.uv.sources]\nshared = { path = \"../../libs/shared\", editable = true }",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	docker, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root libs/shared /deps/workspace/libs/shared")
+}
+
+func TestUvLockRejectsPackageFalseWorkspaceDependency(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentSources:   "[tool.uv.sources]\nshared = { workspace = true }",
+		sharedUvConfig: "[tool.uv]\npackage = false",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error for package = false workspace dependency")
+	}
+	assertContains(t, err.Error(), "tool.uv.package = false")
+}
+
+func TestUvLockAcceptsRootPathWorkspaceSources(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		rootSources: "[tool.uv.sources]\nshared = { path = \"libs/shared\", editable = true }",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+		"auth":   map[string]any{"path": "../../libs/shared/src/shared/auth.py:create_auth"},
+	})
+
+	docker, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	assertContains(t, docker,
+		"COPY --from=uv-workspace-root libs/shared /deps/workspace/libs/shared")
+	assertContains(t, docker,
+		`"/deps/workspace/libs/shared/src/shared/auth.py:create_auth"`)
+}
+
+func TestUvLockRejectsMismatchedPathWorkspaceSources(t *testing.T) {
+	// agent sources point to libs/extra with the name "shared" -> mismatch.
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentSources: "[tool.uv.sources]\nshared = { path = \"../../libs/extra\", editable = true }",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error for mismatched path workspace sources")
+	}
+	assertContains(t, err.Error(), "dependency name and the workspace package name must match")
+}
+
+func TestUvLockDetectsJsPmFromTargetPackageRoot(t *testing.T) {
+	projectRoot, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentSources: "[tool.uv.sources]\nshared = { workspace = true }",
+	})
+
+	agentDir := filepath.Join(projectRoot, "apps", "agent")
+	writeFile(t, filepath.Join(agentDir, "package.json"), "{\"packageManager\":\"pnpm@9.0.0\"}\n")
+	writeFile(t, filepath.Join(agentDir, "pnpm-lock.yaml"), "lockfileVersion: 9.0\n")
+	writeFile(t, filepath.Join(agentDir, "ui.tsx"), "export const ui = null;\n")
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+		"ui":     map[string]any{"agent": "../../apps/agent/ui.tsx"},
+	})
+
+	docker, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	assertContains(t, docker, "WORKDIR /deps/workspace/apps/agent")
+	assertContains(t, docker,
+		"RUN pnpm i --frozen-lockfile && tsx /api/langgraph_api/js/build.mts")
+	assertContains(t, docker, `/deps/workspace/apps/agent/ui.tsx`)
+}
+
+func TestUvLockUsesWorkdirForJsInstallWithSpecialChars(t *testing.T) {
+	projectRoot, _ := writeUvLockWorkspace(t, workspaceOpts{
+		configRelativeDir: "apps/agent;echo pwned",
+	})
+
+	// The custom configRelativeDir creates its own langgraph.json.
+	// We need to place the agent pyproject.toml at this directory.
+	agentDir := filepath.Join(projectRoot, "apps", "agent;echo pwned")
+	writeFile(t, filepath.Join(agentDir, "package.json"), "{\"packageManager\":\"pnpm@9.0.0\"}\n")
+	writeFile(t, filepath.Join(agentDir, "pnpm-lock.yaml"), "lockfileVersion: 9.0\n")
+	writeFile(t, filepath.Join(agentDir, "ui.tsx"), "export const ui = null;\n")
+	writeFile(t, filepath.Join(agentDir, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"agent\"\n"+
+			"version = \"0.1.0\"\n"+
+			"dependencies = [\"shared\", \"httpx>=0.28\"]\n"+
+			"\n"+
+			"[build-system]\n"+
+			"requires = [\"setuptools>=61\"]\n"+
+			"build-backend = \"setuptools.build_meta\"\n")
+	writeFile(t, filepath.Join(agentDir, "src", "agent", "graph.py"), "")
+
+	// Remove the default apps/agent so there's no duplicate package name.
+	if err := os.RemoveAll(filepath.Join(projectRoot, "apps", "agent")); err != nil {
+		t.Fatal(err)
+	}
+
+	// Update workspace members to include the special-char directory.
+	writeFile(t, filepath.Join(projectRoot, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"workspace-root\"\n"+
+			"version = \"0.1.0\"\n"+
+			"\n"+
+			"[tool.uv.workspace]\n"+
+			"members = [\"apps/*\", \"libs/*\"]\n"+
+			"\n"+
+			"[build-system]\n"+
+			"requires = [\"setuptools>=61\"]\n"+
+			"build-backend = \"setuptools.build_meta\"\n")
+
+	configPath := filepath.Join(agentDir, "langgraph.json")
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "./src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+		"ui":     map[string]any{"agent": "./ui.tsx"},
+	})
+
+	docker, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	assertContains(t, docker, "WORKDIR /deps/workspace/apps/agent;echo pwned")
+	assertContains(t, docker,
+		"RUN pnpm i --frozen-lockfile && tsx /api/langgraph_api/js/build.mts")
+	assertNotContains(t, docker, "RUN cd /deps/workspace/apps/agent;echo pwned")
+}
+
+func TestUvLockSupportsSingleUvProjectRoot(t *testing.T) {
+	base := t.TempDir()
+	projectRoot := filepath.Join(base, "single")
+	if err := os.MkdirAll(projectRoot, 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	writeFile(t, filepath.Join(projectRoot, "uv.lock"), "# uv lock file\n")
+	writeFile(t, filepath.Join(projectRoot, "pyproject.toml"),
+		"[project]\n"+
+			"name = \"single-app\"\n"+
+			"version = \"0.1.0\"\n"+
+			"dependencies = [\"httpx>=0.28\"]\n"+
+			"\n"+
+			"[build-system]\n"+
+			"requires = [\"setuptools>=61\"]\n"+
+			"build-backend = \"setuptools.build_meta\"\n")
+	configPath := filepath.Join(projectRoot, "langgraph.json")
+	writeFile(t, configPath, "{}\n")
+	writeFile(t, filepath.Join(projectRoot, "src", "agent.py"), "graph = object()\n")
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs":         map[string]any{"agent": "./src/agent.py:graph"},
+		"source":         map[string]any{"kind": "uv"},
+	})
+
+	docker, contexts, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	assertContains(t, docker,
+		"uv export --package 'single-app' --frozen --no-hashes --no-emit-project --no-emit-workspace")
+	assertContains(t, docker, `"/deps/workspace/src/agent.py:graph"`)
+	if len(contexts) != 0 {
+		t.Fatalf("expected no additional contexts for single-project root, got %d: %v",
+			len(contexts), contexts)
+	}
+}
+
+func TestUvLockRejectsInvalidSourcePackageType(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+	// Override the validated source.package to an integer.
+	cfg["source"].(map[string]any)["package"] = 123
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error for non-string source.package")
+	}
+	assertContains(t, err.Error(), "`source.package` must be a non-empty string")
+}
+
+func TestUvLockRejectsPathsOutsideTargetClosure(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentSources: "[tool.uv.sources]\nshared = { workspace = true }",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			// Graph path points into libs/extra which is NOT a dependency of agent.
+			"agent": "../../libs/extra/src/extra/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error for graph path outside target closure")
+	}
+	assertContains(t, err.Error(), "not inside the target package 'agent'")
+}
+
+func TestUvLockRejectsUnrelatedMemberWhenRootInClosure(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentDependencies: []string{"workspace-root", "shared", "httpx>=0.28"},
+		rootSources:       "[tool.uv.sources]\nshared = { workspace = true }\nworkspace-root = { workspace = true }",
+		agentSources:      "[tool.uv.sources]\nshared = { workspace = true }\nworkspace-root = { workspace = true }",
+	})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			// extra is a workspace member but NOT a dependency of agent.
+			"agent": "../../libs/extra/src/extra/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error for unrelated member when root is in closure")
+	}
+	assertContains(t, err.Error(), "not inside the target package 'agent'")
+}
+
+func TestUvLockRootPackageCopySkipsUnrelatedMembers(t *testing.T) {
+	projectRoot, configPath := writeUvLockWorkspace(t, workspaceOpts{
+		agentDependencies: []string{"workspace-root", "shared", "httpx>=0.28"},
+		rootSources:       "[tool.uv.sources]\nshared = { workspace = true }\nworkspace-root = { workspace = true }",
+		agentSources:      "[tool.uv.sources]\nshared = { workspace = true }\nworkspace-root = { workspace = true }",
+	})
+
+	// Add files in the workspace root package itself.
+	writeFile(t, filepath.Join(projectRoot, "src", "workspace_root", "__init__.py"), "__all__ = []\n")
+	writeFile(t, filepath.Join(projectRoot, "README.md"), "workspace root package\n")
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs": map[string]any{
+			"agent": "../../apps/agent/src/agent/graph.py:graph",
+		},
+		"source": map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	docker, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err != nil {
+		t.Fatalf("ConfigToDocker: %v", err)
+	}
+
+	// Should NOT do a blanket COPY of the whole workspace root.
+	assertNotContains(t, docker, "COPY --from=uv-workspace-root . /deps/workspace")
+	// Should copy specific entries.
+	assertContains(t, docker, "COPY --from=uv-workspace-root src /deps/workspace/src")
+	assertContains(t, docker, "COPY --from=uv-workspace-root README.md /deps/workspace/README.md")
+	// Should NOT copy unrelated member dirs.
+	assertNotContains(t, docker,
+		"COPY --from=uv-workspace-root libs/extra /deps/workspace/libs/extra")
+	// Should install workspace root from /deps/workspace.
+	assertContains(t, docker, "WORKDIR /deps/workspace")
+	assertContains(t, docker,
+		"uv pip install --system --no-cache-dir -c /api/constraints.txt --no-deps -e .")
+}
+
+func TestUvLockMissingLockfile(t *testing.T) {
+	projectRoot, configPath := writeUvLockWorkspace(t, workspaceOpts{})
+
+	// Remove uv.lock.
+	if err := os.Remove(filepath.Join(projectRoot, "uv.lock")); err != nil {
+		t.Fatal(err)
+	}
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs":         map[string]any{"agent": "../../apps/agent/src/agent/graph.py:graph"},
+		"source":         map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error for missing uv.lock")
+	}
+	assertContains(t, err.Error(), "No uv.lock found")
+}
+
+func TestUvLockMissingPyproject(t *testing.T) {
+	projectRoot, configPath := writeUvLockWorkspace(t, workspaceOpts{})
+
+	// Remove root pyproject.toml.
+	if err := os.Remove(filepath.Join(projectRoot, "pyproject.toml")); err != nil {
+		t.Fatal(err)
+	}
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs":         map[string]any{"agent": "../../apps/agent/src/agent/graph.py:graph"},
+		"source":         map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.47",
+	})
+	if err == nil {
+		t.Fatal("expected error for missing pyproject.toml")
+	}
+	assertContains(t, err.Error(), "No pyproject.toml found")
+}
+
+func TestUvLockOldImage(t *testing.T) {
+	_, configPath := writeUvLockWorkspace(t, workspaceOpts{})
+
+	cfg := mustValidate(t, map[string]any{
+		"python_version": "3.11",
+		"graphs":         map[string]any{"agent": "../../apps/agent/src/agent/graph.py:graph"},
+		"source":         map[string]any{"kind": "uv", "root": "../..", "package": "agent"},
+	})
+
+	_, _, err := ConfigToDocker(configPath, cfg, DockerOpts{
+		BaseImage: "langchain/langgraph-api:0.2.46",
+	})
+	if err == nil {
+		t.Fatal("expected error for old image without uv support")
+	}
+	assertContains(t, err.Error(), "requires a base image with uv support")
+}
@@ -0,0 +1,272 @@
+// Package deploy provides an HTTP client for the LangGraph host backend
+// deployment service.
+package deploy
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+)
+
+// Secret represents a name/value pair sent as a deployment secret.
+type Secret struct {
+	Name  string `json:"name"`
+	Value string `json:"value"`
+}
+
+// HostBackendClient is a minimal JSON HTTP client for the host backend
+// deployment service.
+type HostBackendClient struct {
+	BaseURL  string
+	APIKey   string
+	TenantID string
+	client   *http.Client
+}
+
+// retryTransport wraps an http.RoundTripper and retries failed requests.
+type retryTransport struct {
+	base    http.RoundTripper
+	retries int
+}
+
+func (t *retryTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	var resp *http.Response
+	var err error
+
+	// We need to buffer the body so we can replay it on retries.
+	var bodyBytes []byte
+	if req.Body != nil {
+		bodyBytes, err = io.ReadAll(req.Body)
+		if err != nil {
+			return nil, err
+		}
+		req.Body.Close()
+	}
+
+	for attempt := 0; attempt <= t.retries; attempt++ {
+		if bodyBytes != nil {
+			req.Body = io.NopCloser(bytes.NewReader(bodyBytes))
+		}
+		resp, err = t.base.RoundTrip(req)
+		if err == nil {
+			return resp, nil
+		}
+		// Only retry on transport-level errors; do not retry on HTTP error
+		// status codes (the caller handles those).
+	}
+	return resp, err
+}
+
+// NewClient creates a new HostBackendClient. The baseURL is stripped of any
+// trailing slash. The underlying http.Client uses a 30-second timeout and
+// retries transport-level failures up to 3 times.
+func NewClient(baseURL, apiKey string) *HostBackendClient {
+	return &HostBackendClient{
+		BaseURL:  strings.TrimRight(baseURL, "/"),
+		APIKey:   apiKey,
+		TenantID: "",
+		client: &http.Client{
+			Timeout: 30 * time.Second,
+			Transport: &retryTransport{
+				base:    http.DefaultTransport,
+				retries: 3,
+			},
+		},
+	}
+}
+
+// request executes an HTTP request against the host backend and returns the
+// parsed JSON response. It attaches required headers and handles errors.
+func (c *HostBackendClient) request(method, path string, payload map[string]any, params map[string]string) (map[string]any, error) {
+	fullURL := c.BaseURL + path
+
+	// Append query parameters.
+	if len(params) > 0 {
+		q := url.Values{}
+		for k, v := range params {
+			q.Set(k, v)
+		}
+		fullURL += "?" + q.Encode()
+	}
+
+	var body io.Reader
+	if payload != nil {
+		data, err := json.Marshal(payload)
+		if err != nil {
+			return nil, fmt.Errorf("marshalling request payload: %w", err)
+		}
+		body = bytes.NewReader(data)
+	}
+
+	req, err := http.NewRequest(method, fullURL, body)
+	if err != nil {
+		return nil, fmt.Errorf("creating request: %w", err)
+	}
+
+	req.Header.Set("X-Api-Key", c.APIKey)
+	req.Header.Set("Accept", "application/json")
+	if payload != nil {
+		req.Header.Set("Content-Type", "application/json")
+	}
+	if c.TenantID != "" {
+		req.Header.Set("X-Tenant-ID", c.TenantID)
+	}
+
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("%s %s: %w", method, path, err)
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("reading response from %s: %w", path, err)
+	}
+
+	if resp.StatusCode >= 400 {
+		detail := string(respBody)
+		if detail == "" {
+			detail = fmt.Sprintf("%d", resp.StatusCode)
+		}
+		return nil, fmt.Errorf("%s %s failed with status %d: %s", method, path, resp.StatusCode, detail)
+	}
+
+	if len(respBody) == 0 {
+		return nil, nil
+	}
+
+	var result map[string]any
+	if err := json.Unmarshal(respBody, &result); err != nil {
+		return nil, fmt.Errorf("failed to decode response from %s: %w", path, err)
+	}
+	return result, nil
+}
+
+// requestNoBody is a convenience wrapper for requests that return no parsed body.
+func (c *HostBackendClient) requestNoBody(method, path string, payload map[string]any, params map[string]string) error {
+	_, err := c.request(method, path, payload, params)
+	return err
+}
+
+// CreateDeployment creates a new deployment.
+func (c *HostBackendClient) CreateDeployment(name, deploymentType, source string, configPath string, secrets []Secret) (map[string]any, error) {
+	sourceRevisionConfig := map[string]any{}
+	if source == "internal_source" && configPath != "" {
+		sourceRevisionConfig["langgraph_config_path"] = configPath
+	}
+
+	payload := map[string]any{
+		"name":                   name,
+		"source":                 source,
+		"source_config":          map[string]any{"deployment_type": deploymentType},
+		"source_revision_config": sourceRevisionConfig,
+	}
+	if secrets != nil {
+		payload["secrets"] = secrets
+	}
+	return c.request("POST", "/v2/deployments", payload, nil)
+}
+
+// ListDeployments lists deployments, optionally filtering by name.
+func (c *HostBackendClient) ListDeployments(nameContains string) (map[string]any, error) {
+	params := map[string]string{"name_contains": nameContains}
+	return c.request("GET", "/v2/deployments", nil, params)
+}
+
+// GetDeployment retrieves a single deployment by ID.
+func (c *HostBackendClient) GetDeployment(deploymentID string) (map[string]any, error) {
+	return c.request("GET", fmt.Sprintf("/v2/deployments/%s", deploymentID), nil, nil)
+}
+
+// DeleteDeployment deletes a deployment by ID.
+func (c *HostBackendClient) DeleteDeployment(deploymentID string) error {
+	return c.requestNoBody("DELETE", fmt.Sprintf("/v2/deployments/%s", deploymentID), nil, nil)
+}
+
+// RequestPushToken requests a push token for a deployment.
+func (c *HostBackendClient) RequestPushToken(deploymentID string) (map[string]any, error) {
+	return c.request("POST", fmt.Sprintf("/v2/deployments/%s/push-token", deploymentID), nil, nil)
+}
+
+// RequestUploadURL gets a signed URL for uploading the source tarball.
+func (c *HostBackendClient) RequestUploadURL(deploymentID string) (map[string]any, error) {
+	return c.request("POST", fmt.Sprintf("/v2/deployments/%s/upload-url", deploymentID), nil, nil)
+}
+
+// UpdateDeployment triggers a new revision using a pre-pushed Docker image.
+func (c *HostBackendClient) UpdateDeployment(deploymentID, imageURI string, secrets []Secret) (map[string]any, error) {
+	payload := map[string]any{
+		"revision_source":        "internal_docker",
+		"source_revision_config": map[string]any{"image_uri": imageURI},
+	}
+	if secrets != nil {
+		payload["secrets"] = secrets
+	}
+	return c.request("PATCH", fmt.Sprintf("/v2/deployments/%s", deploymentID), payload, nil)
+}
+
+// UpdateDeploymentInternalSource triggers a remote-build revision using an
+// uploaded source tarball.
+func (c *HostBackendClient) UpdateDeploymentInternalSource(
+	deploymentID, sourceTarballPath, configPath string,
+	secrets []Secret,
+	installCommand, buildCommand string,
+) (map[string]any, error) {
+	payload := map[string]any{
+		"revision_source": "internal_source",
+		"source_revision_config": map[string]any{
+			"source_tarball_path":   sourceTarballPath,
+			"langgraph_config_path": configPath,
+		},
+	}
+
+	sourceConfig := map[string]any{}
+	if installCommand != "" {
+		sourceConfig["install_command"] = installCommand
+	}
+	if buildCommand != "" {
+		sourceConfig["build_command"] = buildCommand
+	}
+	if len(sourceConfig) > 0 {
+		payload["source_config"] = sourceConfig
+	}
+
+	if secrets != nil {
+		payload["secrets"] = secrets
+	}
+	return c.request("PATCH", fmt.Sprintf("/v2/deployments/%s", deploymentID), payload, nil)
+}
+
+// ListRevisions lists revisions for a deployment.
+func (c *HostBackendClient) ListRevisions(deploymentID string, limit int) (map[string]any, error) {
+	return c.request("GET", fmt.Sprintf("/v2/deployments/%s/revisions", deploymentID), nil, map[string]string{
+		"limit": fmt.Sprintf("%d", limit),
+	})
+}
+
+// GetRevision retrieves a single revision.
+func (c *HostBackendClient) GetRevision(deploymentID, revisionID string) (map[string]any, error) {
+	return c.request("GET", fmt.Sprintf("/v2/deployments/%s/revisions/%s", deploymentID, revisionID), nil, nil)
+}
+
+// GetBuildLogs retrieves build logs for a revision.
+func (c *HostBackendClient) GetBuildLogs(projectID, revisionID string, payload map[string]any) (map[string]any, error) {
+	return c.request("POST", fmt.Sprintf("/v1/projects/%s/revisions/%s/build_logs", projectID, revisionID), payload, nil)
+}
+
+// GetDeployLogs retrieves deploy logs. If revisionID is non-empty, it is
+// included in the path to scope the logs.
+func (c *HostBackendClient) GetDeployLogs(projectID string, payload map[string]any, revisionID string) (map[string]any, error) {
+	var path string
+	if revisionID != "" {
+		path = fmt.Sprintf("/v1/projects/%s/revisions/%s/deploy_logs", projectID, revisionID)
+	} else {
+		path = fmt.Sprintf("/v1/projects/%s/deploy_logs", projectID)
+	}
+	return c.request("POST", path, payload, nil)
+}
@@ -0,0 +1,306 @@
+package deploy
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"time"
+)
+
+// APIKeyEnvNames lists the environment variable names checked (in order) when
+// resolving a LangSmith / LangGraph API key.
+var APIKeyEnvNames = []string{
+	"LANGGRAPH_HOST_API_KEY",
+	"LANGSMITH_API_KEY",
+	"LANGCHAIN_API_KEY",
+}
+
+// DefaultHostURL is the default host backend URL.
+const DefaultHostURL = "https://api.host.langchain.com"
+
+// reservedEnvVars contains environment variable names that must not be sent as
+// deployment secrets. The set mirrors the Python CLI's RESERVED_ENV_VARS.
+var reservedEnvVars = map[string]bool{
+	// LANGCHAIN_RESERVED_ENV_VARS from host-backend
+	"LANGCHAIN_TRACING_V2":            true,
+	"LANGSMITH_TRACING_V2":            true,
+	"LANGCHAIN_ENDPOINT":              true,
+	"LANGCHAIN_PROJECT":               true,
+	"LANGSMITH_PROJECT":               true,
+	"LANGSMITH_LANGGRAPH_GIT_REPO":    true,
+	"LANGGRAPH_GIT_REPO_PATH":         true,
+	"LANGCHAIN_API_KEY":               true,
+	"LANGSMITH_CONTROL_PLANE_API_KEY": true,
+	"POSTGRES_URI":                    true,
+	"POSTGRES_PASSWORD":               true,
+	"DATABASE_URI":                    true,
+	"LANGSMITH_LANGGRAPH_GIT_REF":     true,
+	"LANGSMITH_LANGGRAPH_GIT_REF_SHA": true,
+	"LANGGRAPH_AUTH_TYPE":             true,
+	"LANGSMITH_AUTH_ENDPOINT":         true,
+	"LANGSMITH_TENANT_ID":             true,
+	"LANGSMITH_AUTH_VERIFY_TENANT_ID": true,
+	"LANGSMITH_HOST_PROJECT_ID":       true,
+	"LANGSMITH_HOST_PROJECT_NAME":     true,
+	"LANGSMITH_HOST_REVISION_ID":      true,
+	"LOG_JSON":                        true,
+	"LOG_DICT_TRACEBACKS":             true,
+	"REDIS_URI":                       true,
+	"LANGCHAIN_CALLBACKS_BACKGROUND":  true,
+	"DD_TRACE_PSYCOPG_ENABLED":        true,
+	"DD_TRACE_REDIS_ENABLED":          true,
+	"LANGSMITH_DEPLOYMENT_NAME":       true,
+	"LANGGRAPH_CLOUD_LICENSE_KEY":     true,
+	// ALLOWED_SELF_HOSTED_ENV_VARS (rejected for non-self-hosted)
+	"LANGSMITH_API_KEY":   true,
+	"LANGSMITH_ENDPOINT":  true,
+	"POSTGRES_URI_CUSTOM": true,
+	"REDIS_URI_CUSTOM":    true,
+	"PATH":                true,
+	"PORT":                true,
+	"MOUNT_PREFIX":        true,
+	"LSD_ENV":             true,
+	"LSD_DD_API_KEY":      true,
+	"LSD_DD_ENDPOINT":     true,
+	"LSD_DEPLOYMENT_TYPE": true,
+}
+
+var (
+	invalidImageNameChars = regexp.MustCompile(`[^a-z0-9._-]+`)
+	validImageTag         = regexp.MustCompile(`^[A-Za-z0-9_.-]+$`)
+)
+
+// NormalizeImageName sanitizes a deployment/directory name into a valid Docker
+// repository name. Invalid characters are replaced with hyphens and the result
+// is lowercased. Returns "app" if the result would be empty.
+func NormalizeImageName(name string) string {
+	if name == "" {
+		return "app"
+	}
+	slug := invalidImageNameChars.ReplaceAllString(strings.ToLower(name), "-")
+	slug = strings.TrimLeft(slug, "-.")
+	slug = strings.TrimRight(slug, "-.")
+	if slug == "" {
+		return "app"
+	}
+	return slug
+}
+
+// NormalizeImageTag validates and returns a Docker image tag. Tags may only
+// contain [A-Za-z0-9_.-]. Defaults to "latest" when empty.
+func NormalizeImageTag(tag string) (string, error) {
+	if tag == "" {
+		return "latest", nil
+	}
+	if !validImageTag.MatchString(tag) {
+		return "", fmt.Errorf("image tag may only contain characters A-Z, a-z, 0-9, '_', '-', '.'")
+	}
+	return tag, nil
+}
+
+// ResolveAPIKey resolves an API key by checking (in order): the explicit flag
+// value, the provided envVars map, and the process environment. Returns an
+// empty string if no key is found (the caller should prompt the user).
+func ResolveAPIKey(flagValue string, envVars map[string]string) string {
+	if flagValue != "" {
+		return flagValue
+	}
+	for _, keyName := range APIKeyEnvNames {
+		if envVars != nil {
+			if v, ok := envVars[keyName]; ok && v != "" {
+				return v
+			}
+		}
+		if v := os.Getenv(keyName); v != "" {
+			return v
+		}
+	}
+	return ""
+}
+
+// ParseEnvFromConfig resolves environment variables from the langgraph.json
+// config. If the "env" field is a dict (map), those values are used directly.
+// If it is a string, it is treated as a path to a .env file (resolved relative
+// to the config file's directory). Otherwise, a .env file in the config
+// directory is attempted as a fallback.
+func ParseEnvFromConfig(configJSON map[string]any, configPath string) map[string]string {
+	envField, ok := configJSON["env"]
+	if !ok {
+		// Fallback: try .env in config dir.
+		return parseDotEnvFile(filepath.Join(filepath.Dir(configPath), ".env"))
+	}
+
+	// If env is a dict (map[string]any), convert to map[string]string.
+	if envMap, ok := envField.(map[string]any); ok && len(envMap) > 0 {
+		result := make(map[string]string, len(envMap))
+		for k, v := range envMap {
+			result[k] = fmt.Sprintf("%v", v)
+		}
+		return result
+	}
+
+	// If env is a string path, parse that .env file.
+	if envStr, ok := envField.(string); ok && envStr != "" {
+		envPath := filepath.Join(filepath.Dir(configPath), envStr)
+		absPath, err := filepath.Abs(envPath)
+		if err != nil {
+			return map[string]string{}
+		}
+		if _, err := os.Stat(absPath); os.IsNotExist(err) {
+			return map[string]string{}
+		}
+		return parseDotEnvFile(absPath)
+	}
+
+	// Fallback: try .env in config dir.
+	return parseDotEnvFile(filepath.Join(filepath.Dir(configPath), ".env"))
+}
+
+// parseDotEnvFile reads a .env file and returns its key-value pairs. Lines
+// starting with # are treated as comments. Empty values are skipped.
+func parseDotEnvFile(path string) map[string]string {
+	f, err := os.Open(path)
+	if err != nil {
+		return map[string]string{}
+	}
+	defer f.Close()
+
+	result := map[string]string{}
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		idx := strings.IndexByte(line, '=')
+		if idx < 0 {
+			continue
+		}
+		key := strings.TrimSpace(line[:idx])
+		value := strings.TrimSpace(line[idx+1:])
+		// Strip surrounding quotes if present.
+		if len(value) >= 2 {
+			if (value[0] == '"' && value[len(value)-1] == '"') ||
+				(value[0] == '\'' && value[len(value)-1] == '\'') {
+				value = value[1 : len(value)-1]
+			}
+		}
+		if key != "" && value != "" {
+			result[key] = value
+		}
+	}
+	return result
+}
+
+// FindDeploymentIDByName lists deployments matching the given name and returns
+// the ID of the first exact match. Returns an empty string (and no error) if
+// no exact match is found.
+func FindDeploymentIDByName(client *HostBackendClient, name string) (string, error) {
+	if name == "" {
+		return "", nil
+	}
+	existing, err := client.ListDeployments(name)
+	if err != nil {
+		return "", err
+	}
+	resources, ok := existing["resources"]
+	if !ok {
+		return "", nil
+	}
+	resourceList, ok := resources.([]any)
+	if !ok {
+		return "", nil
+	}
+	for _, item := range resourceList {
+		dep, ok := item.(map[string]any)
+		if !ok {
+			continue
+		}
+		depName, _ := dep["name"].(string)
+		if depName == name {
+			if id, ok := dep["id"]; ok {
+				return fmt.Sprintf("%v", id), nil
+			}
+		}
+	}
+	return "", nil
+}
+
+// ValidateDeploymentSelector ensures at least one of deploymentID or name is
+// provided.
+func ValidateDeploymentSelector(deploymentID, name string) error {
+	if deploymentID != "" {
+		return nil
+	}
+	if name == "" {
+		return fmt.Errorf("either --deployment-id or --name is required")
+	}
+	return nil
+}
+
+// ResolvedReservedEnvVars returns the set of reserved environment variable
+// names that must not be sent as deployment secrets.
+func ResolvedReservedEnvVars() map[string]bool {
+	// Return a copy to prevent callers from mutating the package-level map.
+	result := make(map[string]bool, len(reservedEnvVars))
+	for k, v := range reservedEnvVars {
+		result[k] = v
+	}
+	return result
+}
+
+// TerminalStatuses are deployment statuses that indicate completion.
+var TerminalStatuses = map[string]bool{
+	"DEPLOYED":      true,
+	"CREATE_FAILED": true,
+	"BUILD_FAILED":  true,
+	"DEPLOY_FAILED": true,
+	"SKIPPED":       true,
+}
+
+// PollDeploymentStatus polls a deployment until it reaches a terminal status or times out.
+func PollDeploymentStatus(client *HostBackendClient, deploymentID string, timeoutSeconds, pollIntervalSeconds int, onStatus func(string)) (string, error) {
+	deadline := time.Now().Add(time.Duration(timeoutSeconds) * time.Second)
+	interval := time.Duration(pollIntervalSeconds) * time.Second
+
+	for time.Now().Before(deadline) {
+		resp, err := client.ListRevisions(deploymentID, 1)
+		if err != nil {
+			return "", err
+		}
+		revisions, _ := resp["revisions"].([]any)
+		if len(revisions) == 0 {
+			time.Sleep(interval)
+			continue
+		}
+		rev, _ := revisions[0].(map[string]any)
+		status, _ := rev["status"].(string)
+		if onStatus != nil {
+			onStatus(status)
+		}
+		if TerminalStatuses[status] {
+			return status, nil
+		}
+		time.Sleep(interval)
+	}
+	return "", fmt.Errorf("deployment timed out after %d seconds", timeoutSeconds)
+}
+
+// SecretsFromEnv converts an env var map into a Secret slice, filtering out
+// reserved variable names and empty values.
+func SecretsFromEnv(envVars map[string]string) []Secret {
+	var secrets []Secret
+	for name, value := range envVars {
+		if reservedEnvVars[name] {
+			continue
+		}
+		if value == "" {
+			continue
+		}
+		secrets = append(secrets, Secret{Name: name, Value: value})
+	}
+	return secrets
+}
@@ -0,0 +1,154 @@
+package deploy
+
+import (
+	"os"
+	"sort"
+	"testing"
+)
+
+func TestNormalizeImageName(t *testing.T) {
+	tests := []struct {
+		input string
+		want  string
+	}{
+		{"MyApp", "myapp"},
+		{"", "app"},
+		{"!!!", "app"},
+		{"my-app", "my-app"},
+		{"My Cool App", "my-cool-app"},
+		{"..leading-dots", "leading-dots"},
+		{"trailing-dots..", "trailing-dots"},
+		{"hello_world.v2", "hello_world.v2"},
+	}
+	for _, tc := range tests {
+		t.Run(tc.input, func(t *testing.T) {
+			got := NormalizeImageName(tc.input)
+			if got != tc.want {
+				t.Errorf("NormalizeImageName(%q) = %q, want %q", tc.input, got, tc.want)
+			}
+		})
+	}
+}
+
+func TestNormalizeImageTag(t *testing.T) {
+	tests := []struct {
+		input   string
+		want    string
+		wantErr bool
+	}{
+		{"v1.2.3", "v1.2.3", false},
+		{"", "latest", false},
+		{"has space", "", true},
+		{"valid_tag-1.0", "valid_tag-1.0", false},
+		{"tag/slash", "", true},
+	}
+	for _, tc := range tests {
+		t.Run(tc.input, func(t *testing.T) {
+			got, err := NormalizeImageTag(tc.input)
+			if tc.wantErr {
+				if err == nil {
+					t.Errorf("NormalizeImageTag(%q) expected error, got nil", tc.input)
+				}
+				return
+			}
+			if err != nil {
+				t.Errorf("NormalizeImageTag(%q) unexpected error: %v", tc.input, err)
+				return
+			}
+			if got != tc.want {
+				t.Errorf("NormalizeImageTag(%q) = %q, want %q", tc.input, got, tc.want)
+			}
+		})
+	}
+}
+
+func TestValidateDeploymentSelector(t *testing.T) {
+	tests := []struct {
+		name         string
+		deploymentID string
+		depName      string
+		wantErr      bool
+	}{
+		{"both empty", "", "", true},
+		{"id set", "abc-123", "", false},
+		{"name set", "", "my-deploy", false},
+		{"both set", "abc-123", "my-deploy", false},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			err := ValidateDeploymentSelector(tc.deploymentID, tc.depName)
+			if tc.wantErr && err == nil {
+				t.Error("expected error, got nil")
+			}
+			if !tc.wantErr && err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+		})
+	}
+}
+
+func TestSecretsFromEnv(t *testing.T) {
+	envVars := map[string]string{
+		"MY_SECRET":         "value1",
+		"ANOTHER_SECRET":    "value2",
+		"LANGCHAIN_API_KEY": "should-be-filtered",
+		"POSTGRES_URI":      "should-be-filtered",
+		"EMPTY_VAR":         "",
+	}
+
+	secrets := SecretsFromEnv(envVars)
+
+	// Sort for deterministic comparison
+	sort.Slice(secrets, func(i, j int) bool {
+		return secrets[i].Name < secrets[j].Name
+	})
+
+	if len(secrets) != 2 {
+		t.Fatalf("expected 2 secrets, got %d: %+v", len(secrets), secrets)
+	}
+
+	if secrets[0].Name != "ANOTHER_SECRET" || secrets[0].Value != "value2" {
+		t.Errorf("unexpected secret[0]: %+v", secrets[0])
+	}
+	if secrets[1].Name != "MY_SECRET" || secrets[1].Value != "value1" {
+		t.Errorf("unexpected secret[1]: %+v", secrets[1])
+	}
+}
+
+func TestResolveAPIKey(t *testing.T) {
+	// Flag value takes precedence
+	got := ResolveAPIKey("flag-key", map[string]string{"LANGSMITH_API_KEY": "env-key"})
+	if got != "flag-key" {
+		t.Errorf("expected flag-key, got %q", got)
+	}
+
+	// envVars map is checked next
+	got = ResolveAPIKey("", map[string]string{"LANGSMITH_API_KEY": "env-key"})
+	if got != "env-key" {
+		t.Errorf("expected env-key, got %q", got)
+	}
+
+	// os.Getenv fallback
+	os.Setenv("LANGSMITH_API_KEY", "os-env-key")
+	defer os.Unsetenv("LANGSMITH_API_KEY")
+
+	got = ResolveAPIKey("", nil)
+	if got != "os-env-key" {
+		t.Errorf("expected os-env-key, got %q", got)
+	}
+
+	// Flag still takes precedence over os env
+	got = ResolveAPIKey("flag-value", nil)
+	if got != "flag-value" {
+		t.Errorf("expected flag-value, got %q", got)
+	}
+
+	// Empty everything returns empty
+	os.Unsetenv("LANGSMITH_API_KEY")
+	os.Unsetenv("LANGGRAPH_HOST_API_KEY")
+	os.Unsetenv("LANGCHAIN_API_KEY")
+	got = ResolveAPIKey("", nil)
+	if got != "" {
+		t.Errorf("expected empty string, got %q", got)
+	}
+}
@@ -0,0 +1,529 @@
+// Package docker provides Docker compose generation, capability detection,
+// and image building for the LangGraph CLI.
+package docker
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/langchain-ai/langgraph/libs/cli/internal/config"
+)
+
+// DefaultPostgresURI is the default connection string used when no custom
+// Postgres URI is provided.
+const DefaultPostgresURI = "postgres://postgres:postgres@langgraph-postgres:5432/postgres?sslmode=disable"
+
+// Version represents a semantic version with major, minor, and patch components.
+type Version struct {
+	Major, Minor, Patch int
+}
+
+// GreaterOrEqual returns true if v >= other.
+func (v Version) GreaterOrEqual(other Version) bool {
+	if v.Major != other.Major {
+		return v.Major > other.Major
+	}
+	if v.Minor != other.Minor {
+		return v.Minor > other.Minor
+	}
+	return v.Patch >= other.Patch
+}
+
+// DockerCapabilities describes the Docker environment available on the host.
+type DockerCapabilities struct {
+	VersionDocker            Version
+	VersionCompose           Version
+	HealthcheckStartInterval bool
+	ComposeType              string // "plugin" or "standalone"
+}
+
+// ComposeOpts configures the generated docker-compose YAML.
+type ComposeOpts struct {
+	Port              int
+	DebuggerPort      int    // 0 means no debugger
+	DebuggerBaseURL   string // optional base URL for the debugger
+	PostgresURI       string // empty means use DefaultPostgresURI
+	Image             string // pre-built image name
+	BaseImage         string
+	APIVersion        string
+	EngineRuntimeMode string // "combined_queue_worker" or "distributed"
+}
+
+// BuildImageOpts configures docker image building.
+type BuildImageOpts struct {
+	ConfigPath     string
+	ConfigJSON     map[string]any
+	BaseImage      string
+	APIVersion     string
+	Pull           bool
+	Tag            string
+	Passthrough    []string
+	InstallCommand string
+	BuildCommand   string
+	DockerCommand  []string // default: ["docker", "build"]
+	ExtraFlags     []string
+	Verbose        bool
+}
+
+// OrderedMap preserves insertion order for map keys.
+type OrderedMap struct {
+	Keys   []string
+	Values map[string]any
+}
+
+// NewOrderedMap creates an empty OrderedMap.
+func NewOrderedMap() *OrderedMap {
+	return &OrderedMap{
+		Values: make(map[string]any),
+	}
+}
+
+// Set adds or updates a key-value pair, preserving insertion order.
+func (om *OrderedMap) Set(key string, value any) {
+	if _, exists := om.Values[key]; !exists {
+		om.Keys = append(om.Keys, key)
+	}
+	om.Values[key] = value
+}
+
+// Get retrieves the value for a key.
+func (om *OrderedMap) Get(key string) (any, bool) {
+	v, ok := om.Values[key]
+	return v, ok
+}
+
+// ---------------------------------------------------------------------------
+// ParseVersion
+// ---------------------------------------------------------------------------
+
+// ParseVersion parses a version string like "1.2.3", "v1.2.3-alpha+build",
+// "1.2", or "1" into a Version.
+func ParseVersion(version string) Version {
+	parts := strings.SplitN(version, ".", 3)
+
+	major := "0"
+	minor := "0"
+	patch := "0"
+
+	switch len(parts) {
+	case 1:
+		major = parts[0]
+	case 2:
+		major = parts[0]
+		minor = parts[1]
+	default:
+		major = parts[0]
+		minor = parts[1]
+		patch = parts[2]
+	}
+
+	// Strip "v" prefix from major
+	major = strings.TrimPrefix(major, "v")
+
+	// Strip "-" and "+" suffixes from patch
+	if idx := strings.IndexAny(patch, "-+"); idx >= 0 {
+		patch = patch[:idx]
+	}
+
+	majorInt, _ := strconv.Atoi(major)
+	minorInt, _ := strconv.Atoi(minor)
+	patchInt, _ := strconv.Atoi(patch)
+
+	return Version{Major: majorInt, Minor: minorInt, Patch: patchInt}
+}
+
+// ---------------------------------------------------------------------------
+// CanBuildLocally
+// ---------------------------------------------------------------------------
+
+// CanBuildLocally checks whether local deployment builds can run on this machine.
+// It returns (ok, errorMessage). If ok is true, errorMessage is empty.
+func CanBuildLocally() (bool, string) {
+	if _, err := exec.LookPath("docker"); err != nil {
+		return false, "Docker is required but not installed.\n" +
+			"Install Docker Desktop: https://docs.docker.com/get-docker/"
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	cmd := exec.CommandContext(ctx, "docker", "info")
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+	if err := cmd.Run(); err != nil {
+		return false, "Docker is installed but not running.\nStart Docker and try again."
+	}
+
+	if runtime.GOARCH != "amd64" {
+		ctx2, cancel2 := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel2()
+
+		buildx := exec.CommandContext(ctx2, "docker", "buildx", "version")
+		buildx.Stdout = nil
+		buildx.Stderr = nil
+		if err := buildx.Run(); err != nil {
+			arch := runtime.GOARCH
+			// Try to match Python's platform.machine() naming for the error message
+			if arch == "arm64" {
+				arch = "aarch64"
+			}
+			return false, "Docker Buildx is required but not installed.\n" +
+				"Your machine architecture (" + arch + ") requires Buildx to cross-compile images for linux/amd64.\n" +
+				"Install Buildx: https://docs.docker.com/build/install-buildx/"
+		}
+	}
+	return true, ""
+}
+
+// ---------------------------------------------------------------------------
+// CheckCapabilities
+// ---------------------------------------------------------------------------
+
+// CheckCapabilities detects the Docker and Docker Compose versions available
+// on the host and returns a DockerCapabilities describing them.
+func CheckCapabilities() (*DockerCapabilities, error) {
+	if _, err := exec.LookPath("docker"); err != nil {
+		return nil, fmt.Errorf("Docker not installed")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	out, err := exec.CommandContext(ctx, "docker", "info", "-f", "{{json .}}").Output()
+	if err != nil {
+		return nil, fmt.Errorf("Docker not installed or not running")
+	}
+
+	var info map[string]any
+	if err := json.Unmarshal(out, &info); err != nil {
+		return nil, fmt.Errorf("Docker not installed or not running")
+	}
+
+	serverVersion, _ := info["ServerVersion"].(string)
+	if serverVersion == "" {
+		return nil, fmt.Errorf("Docker not running")
+	}
+
+	// Try to find compose plugin
+	var composeVersionStr string
+	composeType := "plugin"
+
+	found := false
+	if clientInfo, ok := info["ClientInfo"].(map[string]any); ok {
+		if plugins, ok := clientInfo["Plugins"].([]any); ok {
+			for _, p := range plugins {
+				pm, ok := p.(map[string]any)
+				if !ok {
+					continue
+				}
+				name, _ := pm["Name"].(string)
+				if name == "compose" {
+					composeVersionStr, _ = pm["Version"].(string)
+					found = true
+					break
+				}
+			}
+		}
+	}
+
+	if !found {
+		// Fall back to standalone docker-compose
+		if _, err := exec.LookPath("docker-compose"); err != nil {
+			return nil, fmt.Errorf("Docker Compose not installed")
+		}
+
+		ctx2, cancel2 := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel2()
+
+		out2, err := exec.CommandContext(ctx2, "docker-compose", "--version", "--short").Output()
+		if err != nil {
+			return nil, fmt.Errorf("Docker Compose not installed")
+		}
+		composeVersionStr = strings.TrimSpace(string(out2))
+		composeType = "standalone"
+	}
+
+	dockerVersion := ParseVersion(serverVersion)
+	composeVersion := ParseVersion(composeVersionStr)
+
+	return &DockerCapabilities{
+		VersionDocker:            dockerVersion,
+		VersionCompose:           composeVersion,
+		HealthcheckStartInterval: dockerVersion.GreaterOrEqual(Version{25, 0, 0}),
+		ComposeType:              composeType,
+	}, nil
+}
+
+// ---------------------------------------------------------------------------
+// DebuggerCompose
+// ---------------------------------------------------------------------------
+
+// DebuggerCompose returns a service config map for the langgraph-debugger
+// container, or nil if port is 0 (no debugger requested).
+func DebuggerCompose(port int, baseURL string) *OrderedMap {
+	if port == 0 {
+		return nil
+	}
+
+	dependsOn := NewOrderedMap()
+	postgresCondition := NewOrderedMap()
+	postgresCondition.Set("condition", "service_healthy")
+	dependsOn.Set("langgraph-postgres", postgresCondition)
+
+	service := NewOrderedMap()
+	service.Set("image", "langchain/langgraph-debugger")
+	service.Set("restart", "on-failure")
+	service.Set("depends_on", dependsOn)
+	service.Set("ports", []any{fmt.Sprintf(`"%d:3968"`, port)})
+
+	if baseURL != "" {
+		env := NewOrderedMap()
+		env.Set("VITE_STUDIO_LOCAL_GRAPH_URL", baseURL)
+		service.Set("environment", env)
+	}
+
+	result := NewOrderedMap()
+	result.Set("langgraph-debugger", service)
+	return result
+}
+
+// ---------------------------------------------------------------------------
+// DictToYAML
+// ---------------------------------------------------------------------------
+
+// DictToYAML converts an OrderedMap to a YAML string. For top-level keys
+// (indent < 2) it adds a blank line between entries (except the first).
+func DictToYAML(d *OrderedMap, indent int) string {
+	var b strings.Builder
+	for idx, key := range d.Keys {
+		// Add blank line between top-level entries (except first)
+		if idx >= 1 && indent < 2 {
+			b.WriteString("\n")
+		}
+
+		space := strings.Repeat("    ", indent)
+		value := d.Values[key]
+
+		switch v := value.(type) {
+		case *OrderedMap:
+			b.WriteString(fmt.Sprintf("%s%s:\n", space, key))
+			b.WriteString(DictToYAML(v, indent+1))
+		case []any:
+			b.WriteString(fmt.Sprintf("%s%s:\n", space, key))
+			for _, item := range v {
+				b.WriteString(fmt.Sprintf("%s    - %v\n", space, item))
+			}
+		default:
+			b.WriteString(fmt.Sprintf("%s%s: %v\n", space, key, value))
+		}
+	}
+	return b.String()
+}
+
+// ---------------------------------------------------------------------------
+// ComposeAsDict
+// ---------------------------------------------------------------------------
+
+// ComposeAsDict builds the docker-compose configuration as an OrderedMap.
+func ComposeAsDict(caps *DockerCapabilities, opts ComposeOpts) *OrderedMap {
+	postgresURI := opts.PostgresURI
+	includeDB := false
+	if postgresURI == "" {
+		includeDB = true
+		postgresURI = DefaultPostgresURI
+	}
+
+	services := NewOrderedMap()
+
+	// --- Redis service ---
+	redisHealthcheck := NewOrderedMap()
+	redisHealthcheck.Set("test", "redis-cli ping")
+	redisHealthcheck.Set("interval", "5s")
+	redisHealthcheck.Set("timeout", "1s")
+	redisHealthcheck.Set("retries", 5)
+
+	redisService := NewOrderedMap()
+	redisService.Set("image", "redis:6")
+	redisService.Set("healthcheck", redisHealthcheck)
+	services.Set("langgraph-redis", redisService)
+
+	// --- Postgres service (if no custom URI) ---
+	if includeDB {
+		pgEnv := NewOrderedMap()
+		pgEnv.Set("POSTGRES_DB", "postgres")
+		pgEnv.Set("POSTGRES_USER", "postgres")
+		pgEnv.Set("POSTGRES_PASSWORD", "postgres")
+
+		pgHealthcheck := NewOrderedMap()
+		pgHealthcheck.Set("test", "pg_isready -U postgres")
+		pgHealthcheck.Set("start_period", "10s")
+		pgHealthcheck.Set("timeout", "1s")
+		pgHealthcheck.Set("retries", 5)
+
+		if caps.HealthcheckStartInterval {
+			pgHealthcheck.Set("interval", "60s")
+			pgHealthcheck.Set("start_interval", "1s")
+		} else {
+			pgHealthcheck.Set("interval", "5s")
+		}
+
+		pgService := NewOrderedMap()
+		pgService.Set("image", "pgvector/pgvector:pg16")
+		pgService.Set("ports", []any{`"5433:5432"`})
+		pgService.Set("environment", pgEnv)
+		pgService.Set("command", []any{"postgres", "-c", "shared_preload_libraries=vector"})
+		pgService.Set("volumes", []any{"langgraph-data:/var/lib/postgresql/data"})
+		pgService.Set("healthcheck", pgHealthcheck)
+
+		services.Set("langgraph-postgres", pgService)
+	}
+
+	// --- Debugger service (optional) ---
+	if opts.DebuggerPort != 0 {
+		debuggerMap := DebuggerCompose(opts.DebuggerPort, opts.DebuggerBaseURL)
+		if debuggerMap != nil {
+			debuggerService, _ := debuggerMap.Get("langgraph-debugger")
+			services.Set("langgraph-debugger", debuggerService)
+		}
+	}
+
+	// --- langgraph-api service ---
+	apiEnv := NewOrderedMap()
+	apiEnv.Set("REDIS_URI", "redis://langgraph-redis:6379")
+	apiEnv.Set("POSTGRES_URI", postgresURI)
+
+	if opts.EngineRuntimeMode == "distributed" {
+		apiEnv.Set("N_JOBS_PER_WORKER", `"0"`)
+	}
+
+	apiDependsOn := NewOrderedMap()
+	redisCondition := NewOrderedMap()
+	redisCondition.Set("condition", "service_healthy")
+	apiDependsOn.Set("langgraph-redis", redisCondition)
+
+	if includeDB {
+		pgCondition := NewOrderedMap()
+		pgCondition.Set("condition", "service_healthy")
+		apiDependsOn.Set("langgraph-postgres", pgCondition)
+	}
+
+	apiService := NewOrderedMap()
+	apiService.Set("ports", []any{fmt.Sprintf(`"%d:8000"`, opts.Port)})
+	apiService.Set("depends_on", apiDependsOn)
+	apiService.Set("environment", apiEnv)
+
+	if opts.Image != "" {
+		apiService.Set("image", opts.Image)
+	}
+
+	if caps.HealthcheckStartInterval {
+		apiHealthcheck := NewOrderedMap()
+		apiHealthcheck.Set("test", "python /api/healthcheck.py")
+		apiHealthcheck.Set("interval", "60s")
+		apiHealthcheck.Set("start_interval", "1s")
+		apiHealthcheck.Set("start_period", "10s")
+		apiService.Set("healthcheck", apiHealthcheck)
+	}
+
+	services.Set("langgraph-api", apiService)
+
+	// --- Build final compose dict ---
+	composeDict := NewOrderedMap()
+	if includeDB {
+		volumes := NewOrderedMap()
+		volumeDriver := NewOrderedMap()
+		volumeDriver.Set("driver", "local")
+		volumes.Set("langgraph-data", volumeDriver)
+		composeDict.Set("volumes", volumes)
+	}
+	composeDict.Set("services", services)
+
+	return composeDict
+}
+
+// ---------------------------------------------------------------------------
+// Compose
+// ---------------------------------------------------------------------------
+
+// Compose generates a docker-compose YAML string from the given capabilities
+// and options.
+func Compose(caps *DockerCapabilities, opts ComposeOpts) string {
+	d := ComposeAsDict(caps, opts)
+	return DictToYAML(d, 0)
+}
+
+// ---------------------------------------------------------------------------
+// BuildDockerImage
+// ---------------------------------------------------------------------------
+
+// BuildDockerImage builds a Docker image from a LangGraph configuration.
+// It shells out to docker build (or a custom docker command) with the
+// generated Dockerfile piped via stdin.
+func BuildDockerImage(opts BuildImageOpts) error {
+	dockerCmd := opts.DockerCommand
+	if len(dockerCmd) == 0 {
+		dockerCmd = []string{"docker", "build"}
+	}
+
+	// Pull the base image first if requested.
+	if opts.Pull {
+		pullCmd := exec.Command("docker", "pull", opts.Tag)
+		pullCmd.Stdout = os.Stdout
+		pullCmd.Stderr = os.Stderr
+		if err := pullCmd.Run(); err != nil {
+			return fmt.Errorf("failed to pull image %s: %w", opts.Tag, err)
+		}
+	}
+
+	// Build the docker build arguments.
+	args := []string{
+		"-f", "-", // read Dockerfile from stdin
+		"-t", opts.Tag,
+	}
+
+	// Determine build context.
+	buildContext := "."
+	if opts.ConfigPath != "" {
+		// Use the parent directory of the config file by default.
+		idx := strings.LastIndex(opts.ConfigPath, "/")
+		if idx >= 0 {
+			buildContext = opts.ConfigPath[:idx]
+		}
+	}
+
+	// Generate the Dockerfile using the real config.ConfigToDocker.
+	dockerfile, additionalContexts, err := config.ConfigToDocker(opts.ConfigPath, opts.ConfigJSON, config.DockerOpts{
+		BaseImage:      opts.BaseImage,
+		APIVersion:     opts.APIVersion,
+		InstallCommand: opts.InstallCommand,
+		BuildCommand:   opts.BuildCommand,
+	})
+	if err != nil {
+		return fmt.Errorf("generating Dockerfile: %w", err)
+	}
+
+	// Add additional build contexts (for dependencies outside the main context).
+	for name, path := range additionalContexts {
+		args = append(args, "--build-context", fmt.Sprintf("%s=%s", name, path))
+	}
+
+	// Assemble the full command.
+	fullArgs := append(dockerCmd[1:], args...)
+	fullArgs = append(fullArgs, opts.ExtraFlags...)
+	fullArgs = append(fullArgs, opts.Passthrough...)
+	fullArgs = append(fullArgs, buildContext)
+
+	cmd := exec.Command(dockerCmd[0], fullArgs...)
+	cmd.Stdin = strings.NewReader(dockerfile)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	return cmd.Run()
+}
@@ -0,0 +1,290 @@
+package docker
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+)
+
+func cleanEmptyLines(s string) string {
+	lines := strings.Split(s, "\n")
+	var result []string
+	for _, line := range lines {
+		if strings.TrimSpace(line) != "" {
+			result = append(result, line)
+		}
+	}
+	return strings.Join(result, "\n")
+}
+
+var defaultCaps = &DockerCapabilities{
+	VersionDocker:            Version{Major: 26, Minor: 1, Patch: 1},
+	VersionCompose:           Version{Major: 2, Minor: 27, Patch: 0},
+	HealthcheckStartInterval: false,
+}
+
+func TestComposeCustomDBNoDebugger(t *testing.T) {
+	port := 8123
+	actual := Compose(defaultCaps, ComposeOpts{
+		Port:        port,
+		PostgresURI: "custom_postgres_uri",
+	})
+	expected := fmt.Sprintf(`services:
+    langgraph-redis:
+        image: redis:6
+        healthcheck:
+            test: redis-cli ping
+            interval: 5s
+            timeout: 1s
+            retries: 5
+    langgraph-api:
+        ports:
+            - "%d:8000"
+        depends_on:
+            langgraph-redis:
+                condition: service_healthy
+        environment:
+            REDIS_URI: redis://langgraph-redis:6379
+            POSTGRES_URI: custom_postgres_uri`, port)
+
+	if cleanEmptyLines(actual) != expected {
+		t.Errorf("mismatch.\nExpected:\n%s\n\nGot:\n%s", expected, cleanEmptyLines(actual))
+	}
+}
+
+func TestComposeCustomDBWithHealthcheck(t *testing.T) {
+	port := 8123
+	capsHC := &DockerCapabilities{
+		VersionDocker:            Version{Major: 26, Minor: 1, Patch: 1},
+		VersionCompose:           Version{Major: 2, Minor: 27, Patch: 0},
+		HealthcheckStartInterval: true,
+	}
+	actual := Compose(capsHC, ComposeOpts{
+		Port:        port,
+		PostgresURI: "custom_postgres_uri",
+	})
+	expected := fmt.Sprintf(`services:
+    langgraph-redis:
+        image: redis:6
+        healthcheck:
+            test: redis-cli ping
+            interval: 5s
+            timeout: 1s
+            retries: 5
+    langgraph-api:
+        ports:
+            - "%d:8000"
+        depends_on:
+            langgraph-redis:
+                condition: service_healthy
+        environment:
+            REDIS_URI: redis://langgraph-redis:6379
+            POSTGRES_URI: custom_postgres_uri
+        healthcheck:
+            test: python /api/healthcheck.py
+            interval: 60s
+            start_interval: 1s
+            start_period: 10s`, port)
+
+	if cleanEmptyLines(actual) != expected {
+		t.Errorf("mismatch.\nExpected:\n%s\n\nGot:\n%s", expected, cleanEmptyLines(actual))
+	}
+}
+
+func TestComposeDefaultDB(t *testing.T) {
+	port := 8123
+	actual := Compose(defaultCaps, ComposeOpts{Port: port})
+	expected := fmt.Sprintf(`volumes:
+    langgraph-data:
+        driver: local
+services:
+    langgraph-redis:
+        image: redis:6
+        healthcheck:
+            test: redis-cli ping
+            interval: 5s
+            timeout: 1s
+            retries: 5
+    langgraph-postgres:
+        image: pgvector/pgvector:pg16
+        ports:
+            - "5433:5432"
+        environment:
+            POSTGRES_DB: postgres
+            POSTGRES_USER: postgres
+            POSTGRES_PASSWORD: postgres
+        command:
+            - postgres
+            - -c
+            - shared_preload_libraries=vector
+        volumes:
+            - langgraph-data:/var/lib/postgresql/data
+        healthcheck:
+            test: pg_isready -U postgres
+            start_period: 10s
+            timeout: 1s
+            retries: 5
+            interval: 5s
+    langgraph-api:
+        ports:
+            - "%d:8000"
+        depends_on:
+            langgraph-redis:
+                condition: service_healthy
+            langgraph-postgres:
+                condition: service_healthy
+        environment:
+            REDIS_URI: redis://langgraph-redis:6379
+            POSTGRES_URI: %s`, port, DefaultPostgresURI)
+
+	if cleanEmptyLines(actual) != expected {
+		t.Errorf("mismatch.\nExpected:\n%s\n\nGot:\n%s", expected, cleanEmptyLines(actual))
+	}
+}
+
+func TestComposeDistributedMode(t *testing.T) {
+	port := 8123
+	actual := Compose(defaultCaps, ComposeOpts{
+		Port:              port,
+		PostgresURI:       "custom_postgres_uri",
+		EngineRuntimeMode: "distributed",
+	})
+	expected := fmt.Sprintf(`services:
+    langgraph-redis:
+        image: redis:6
+        healthcheck:
+            test: redis-cli ping
+            interval: 5s
+            timeout: 1s
+            retries: 5
+    langgraph-api:
+        ports:
+            - "%d:8000"
+        depends_on:
+            langgraph-redis:
+                condition: service_healthy
+        environment:
+            REDIS_URI: redis://langgraph-redis:6379
+            POSTGRES_URI: custom_postgres_uri
+            N_JOBS_PER_WORKER: "0"`, port)
+
+	if cleanEmptyLines(actual) != expected {
+		t.Errorf("mismatch.\nExpected:\n%s\n\nGot:\n%s", expected, cleanEmptyLines(actual))
+	}
+}
+
+func TestComposeCombinedModeNoNJobs(t *testing.T) {
+	actual := Compose(defaultCaps, ComposeOpts{
+		Port:              8123,
+		EngineRuntimeMode: "combined_queue_worker",
+	})
+	if strings.Contains(actual, "N_JOBS_PER_WORKER") {
+		t.Error("combined mode should not contain N_JOBS_PER_WORKER")
+	}
+}
+
+func TestComposeDebuggerDefaultDB(t *testing.T) {
+	port := 8123
+	debuggerPort := 8001
+	actual := Compose(defaultCaps, ComposeOpts{
+		Port:         port,
+		DebuggerPort: debuggerPort,
+	})
+	expected := fmt.Sprintf(`volumes:
+    langgraph-data:
+        driver: local
+services:
+    langgraph-redis:
+        image: redis:6
+        healthcheck:
+            test: redis-cli ping
+            interval: 5s
+            timeout: 1s
+            retries: 5
+    langgraph-postgres:
+        image: pgvector/pgvector:pg16
+        ports:
+            - "5433:5432"
+        environment:
+            POSTGRES_DB: postgres
+            POSTGRES_USER: postgres
+            POSTGRES_PASSWORD: postgres
+        command:
+            - postgres
+            - -c
+            - shared_preload_libraries=vector
+        volumes:
+            - langgraph-data:/var/lib/postgresql/data
+        healthcheck:
+            test: pg_isready -U postgres
+            start_period: 10s
+            timeout: 1s
+            retries: 5
+            interval: 5s
+    langgraph-debugger:
+        image: langchain/langgraph-debugger
+        restart: on-failure
+        depends_on:
+            langgraph-postgres:
+                condition: service_healthy
+        ports:
+            - "%d:3968"
+    langgraph-api:
+        ports:
+            - "%d:8000"
+        depends_on:
+            langgraph-redis:
+                condition: service_healthy
+            langgraph-postgres:
+                condition: service_healthy
+        environment:
+            REDIS_URI: redis://langgraph-redis:6379
+            POSTGRES_URI: %s`, debuggerPort, port, DefaultPostgresURI)
+
+	if cleanEmptyLines(actual) != expected {
+		t.Errorf("mismatch.\nExpected:\n%s\n\nGot:\n%s", expected, cleanEmptyLines(actual))
+	}
+}
+
+func TestParseVersion(t *testing.T) {
+	tests := []struct {
+		input    string
+		expected Version
+	}{
+		{"1.2.3", Version{1, 2, 3}},
+		{"v1.2.3", Version{1, 2, 3}},
+		{"1.2.3-alpha", Version{1, 2, 3}},
+		{"1.2.3+1", Version{1, 2, 3}},
+		{"1.2.3-alpha+build", Version{1, 2, 3}},
+		{"1.2", Version{1, 2, 0}},
+		{"1", Version{1, 0, 0}},
+		{"v28.1.1+1", Version{28, 1, 1}},
+		{"2.0.0-beta.1+exp.sha.5114f85", Version{2, 0, 0}},
+		{"v3.4.5-rc1+build.123", Version{3, 4, 5}},
+	}
+
+	for _, tc := range tests {
+		result := ParseVersion(tc.input)
+		if result != tc.expected {
+			t.Errorf("ParseVersion(%q) = %v, want %v", tc.input, result, tc.expected)
+		}
+	}
+}
+
+func TestVersionGreaterOrEqual(t *testing.T) {
+	tests := []struct {
+		v, other Version
+		want     bool
+	}{
+		{Version{25, 0, 0}, Version{25, 0, 0}, true},
+		{Version{26, 1, 1}, Version{25, 0, 0}, true},
+		{Version{24, 9, 9}, Version{25, 0, 0}, false},
+	}
+
+	for _, tc := range tests {
+		got := tc.v.GreaterOrEqual(tc.other)
+		if got != tc.want {
+			t.Errorf("%v.GreaterOrEqual(%v) = %v, want %v", tc.v, tc.other, got, tc.want)
+		}
+	}
+}
@@ -0,0 +1,123 @@
+// Package lgexec provides subprocess execution helpers for the LangGraph CLI.
+//
+// The package name is lgexec (rather than exec) to avoid shadowing the
+// standard library os/exec package.
+package lgexec
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+// RunOpts configures how a subprocess is executed.
+type RunOpts struct {
+	Stdin   string   // input to pass via stdin
+	Verbose bool     // pipe stdout/stderr to os.Stdout/os.Stderr
+	Dir     string   // working directory
+	Env     []string // environment variables (KEY=VALUE)
+}
+
+// Run executes the named program with the given arguments.
+//
+// When Verbose is true stdout and stderr are forwarded to the process's
+// os.Stdout / os.Stderr.  Otherwise output is silently discarded.
+// A non-zero exit code is returned as an *ExitError.
+func Run(name string, args []string, opts RunOpts) error {
+	cmd := exec.Command(name, args...)
+
+	if opts.Dir != "" {
+		cmd.Dir = opts.Dir
+	}
+	if len(opts.Env) > 0 {
+		cmd.Env = append(os.Environ(), opts.Env...)
+	}
+
+	if opts.Stdin != "" {
+		cmd.Stdin = strings.NewReader(opts.Stdin)
+	}
+
+	if opts.Verbose {
+		if opts.Stdin != "" {
+			cmdStr := fmt.Sprintf("+ %s %s", name, strings.Join(args, " "))
+			fmt.Printf("%s <\n%s\n", cmdStr, strings.Join(
+				nonEmptyLines(opts.Stdin), "\n"))
+		} else {
+			fmt.Printf("+ %s %s\n", name, strings.Join(args, " "))
+		}
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+	} else {
+		cmd.Stdout = io.Discard
+		cmd.Stderr = io.Discard
+	}
+
+	return cmd.Run()
+}
+
+// RunCollect executes the named program and collects stdout and stderr.
+// Both are returned as strings. A non-zero exit code results in a non-nil error.
+func RunCollect(name string, args []string) (stdout, stderr string, err error) {
+	cmd := exec.Command(name, args...)
+
+	var outBuf, errBuf bytes.Buffer
+	cmd.Stdout = &outBuf
+	cmd.Stderr = &errBuf
+
+	err = cmd.Run()
+	return outBuf.String(), errBuf.String(), err
+}
+
+// RunWithCallback executes the named program and invokes onStdout for each
+// line of stdout output.  If onStdout returns true the callback is no longer
+// called and remaining stdout is forwarded directly to os.Stdout (matching
+// the Python CLI's monitor_stream behaviour).
+// Stderr is always forwarded to os.Stderr.
+func RunWithCallback(name string, args []string, onStdout func(string) bool) error {
+	cmd := exec.Command(name, args...)
+	cmd.Stderr = os.Stderr
+
+	pipe, err := cmd.StdoutPipe()
+	if err != nil {
+		return fmt.Errorf("cannot create stdout pipe: %w", err)
+	}
+
+	if err := cmd.Start(); err != nil {
+		return fmt.Errorf("cannot start command: %w", err)
+	}
+
+	scanner := bufio.NewScanner(pipe)
+	stopped := false
+	for scanner.Scan() {
+		line := scanner.Text()
+		if stopped {
+			// After callback signalled stop, forward remaining output.
+			fmt.Fprintln(os.Stdout, line)
+			continue
+		}
+		if onStdout(line) {
+			stopped = true
+		}
+	}
+	if scanErr := scanner.Err(); scanErr != nil {
+		// Drain but ignore read errors on stdout — the exit code matters.
+		_ = scanErr
+	}
+
+	return cmd.Wait()
+}
+
+// nonEmptyLines splits s on newlines and returns lines that are not empty.
+func nonEmptyLines(s string) []string {
+	var out []string
+	for _, line := range strings.Split(s, "\n") {
+		if line != "" {
+			out = append(out, line)
+		}
+	}
+	return out
+}
@@ -0,0 +1,287 @@
+package root
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestRunHelp(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	exitCode := Run(nil, &stdout, &stderr)
+
+	if exitCode != 0 {
+		t.Fatalf("expected exit code 0, got %d", exitCode)
+	}
+	if stderr.Len() != 0 {
+		t.Fatalf("expected no stderr output, got %q", stderr.String())
+	}
+	if !strings.Contains(stdout.String(), "validate") {
+		t.Fatalf("expected help text to contain 'validate', got %q", stdout.String())
+	}
+}
+
+func TestRunVersion(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	exitCode := Run([]string{"version"}, &stdout, &stderr)
+
+	if exitCode != 0 {
+		t.Fatalf("expected exit code 0, got %d", exitCode)
+	}
+	if stderr.Len() != 0 {
+		t.Fatalf("expected no stderr output, got %q", stderr.String())
+	}
+	if !strings.Contains(stdout.String(), "langgraph") {
+		t.Fatalf("unexpected stdout: %q", stdout.String())
+	}
+}
+
+func TestRunUnknownCommand(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	exitCode := Run([]string{"nonexistent-cmd"}, &stdout, &stderr)
+
+	if exitCode != 1 {
+		t.Fatalf("expected exit code 1, got %d", exitCode)
+	}
+	if !strings.Contains(stderr.String(), "is not a langgraph command") {
+		t.Fatalf("unexpected stderr: %q", stderr.String())
+	}
+}
+
+func writeTempConfig(t *testing.T, content string) string {
+	t.Helper()
+	dir := t.TempDir()
+	path := filepath.Join(dir, "langgraph.json")
+	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
+		t.Fatalf("failed to write temp config: %v", err)
+	}
+	return path
+}
+
+func TestRunValidateWithValidConfig(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	path := writeTempConfig(t, `{"dependencies": ["langchain"], "graphs": {"agent": "./agent.py:graph"}}`)
+
+	exitCode := Run([]string{"validate", "-c", path}, &stdout, &stderr)
+
+	if exitCode != 0 {
+		t.Fatalf("expected exit code 0, got %d; stderr: %q", exitCode, stderr.String())
+	}
+	if !strings.Contains(stdout.String(), "is valid") {
+		t.Fatalf("expected stdout to contain 'is valid', got %q", stdout.String())
+	}
+	if !strings.Contains(stdout.String(), "1 graph") {
+		t.Fatalf("expected stdout to contain '1 graph', got %q", stdout.String())
+	}
+}
+
+func TestRunValidateWithInvalidConfig(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	path := writeTempConfig(t, `{"graphs": {}}`)
+
+	exitCode := Run([]string{"validate", "-c", path}, &stdout, &stderr)
+
+	if exitCode != 1 {
+		t.Fatalf("expected exit code 1, got %d", exitCode)
+	}
+	if !strings.Contains(stderr.String(), "No graphs found") {
+		t.Fatalf("expected stderr to contain 'No graphs found', got %q", stderr.String())
+	}
+}
+
+func TestRunValidateWithInvalidJSON(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	path := writeTempConfig(t, `{invalid json`)
+
+	exitCode := Run([]string{"validate", "-c", path}, &stdout, &stderr)
+
+	if exitCode != 1 {
+		t.Fatalf("expected exit code 1, got %d", exitCode)
+	}
+	if !strings.Contains(stderr.String(), "Invalid JSON") {
+		t.Fatalf("expected stderr to contain 'Invalid JSON', got %q", stderr.String())
+	}
+}
+
+func TestRunValidateWithNonObjectJSON(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	path := writeTempConfig(t, `[]`)
+
+	exitCode := Run([]string{"validate", "-c", path}, &stdout, &stderr)
+
+	if exitCode != 1 {
+		t.Fatalf("expected exit code 1, got %d", exitCode)
+	}
+	if !strings.Contains(stderr.String(), "top-level JSON value must be an object") {
+		t.Fatalf("expected stderr to mention object-shaped config, got %q", stderr.String())
+	}
+}
+
+func TestRunValidateDefaultConfigMissing(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	// Use a path that definitely does not exist.
+	nonexistent := filepath.Join(t.TempDir(), "langgraph.json")
+
+	exitCode := Run([]string{"validate", "-c", nonexistent}, &stdout, &stderr)
+
+	if exitCode != 1 {
+		t.Fatalf("expected exit code 1, got %d", exitCode)
+	}
+	if !strings.Contains(stderr.String(), "does not exist") {
+		t.Fatalf("expected stderr to contain 'does not exist', got %q", stderr.String())
+	}
+}
+
+func TestRunValidateWithUnknownKeys(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	path := writeTempConfig(t, `{"dependencies": ["langchain"], "graphs": {"agent": "./agent.py:graph"}, "grpahs": {}}`)
+
+	exitCode := Run([]string{"validate", "-c", path}, &stdout, &stderr)
+
+	if exitCode != 0 {
+		t.Fatalf("expected exit code 0, got %d; stderr: %q", exitCode, stderr.String())
+	}
+	out := stdout.String()
+	if !strings.Contains(strings.ToLower(out), "warning") {
+		t.Fatalf("expected stdout to contain 'warning', got %q", out)
+	}
+	if !strings.Contains(strings.ToLower(out), "did you mean") {
+		t.Fatalf("expected stdout to contain 'did you mean', got %q", out)
+	}
+}
+
+func TestRunValidateHelp(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	exitCode := Run([]string{"validate", "--help"}, &stdout, &stderr)
+
+	if exitCode != 0 {
+		t.Fatalf("expected exit code 0, got %d", exitCode)
+	}
+	if !strings.Contains(stdout.String(), "Validate the LangGraph configuration file") {
+		t.Fatalf("expected stdout to contain validate help text, got %q", stdout.String())
+	}
+}
+
+func TestRunValidateMultipleGraphs(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	path := writeTempConfig(t, `{"dependencies": ["langchain"], "graphs": {"agent": "./a.py:g", "bot": "./b.py:g"}}`)
+
+	exitCode := Run([]string{"validate", "-c", path}, &stdout, &stderr)
+
+	if exitCode != 0 {
+		t.Fatalf("expected exit code 0, got %d; stderr: %q", exitCode, stderr.String())
+	}
+	if !strings.Contains(stdout.String(), "2 graphs found") {
+		t.Fatalf("expected stdout to contain '2 graphs found', got %q", stdout.String())
+	}
+}
+
+func TestRunValidateWithWarningsAndErrors(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	path := writeTempConfig(t, `{"graphs": {}, "grpahs": {}}`)
+
+	exitCode := Run([]string{"validate", "-c", path}, &stdout, &stderr)
+
+	if exitCode != 1 {
+		t.Fatalf("expected exit code 1, got %d", exitCode)
+	}
+	errOut := stderr.String()
+	if !strings.Contains(errOut, "No graphs found") {
+		t.Fatalf("expected stderr to contain 'No graphs found', got %q", errOut)
+	}
+	if !strings.Contains(strings.ToLower(errOut), "warning") {
+		t.Fatalf("expected stderr to contain 'warning', got %q", errOut)
+	}
+}
+
+func TestRunValidateWithInvalidPackageJSON(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	dir := t.TempDir()
+	configPath := filepath.Join(dir, "langgraph.json")
+	packagePath := filepath.Join(dir, "package.json")
+	if err := os.WriteFile(
+		configPath,
+		[]byte(`{"node_version":"20","graphs":{"agent":"./agent.js:graph"}}`),
+		0644,
+	); err != nil {
+		t.Fatalf("failed to write config: %v", err)
+	}
+	if err := os.WriteFile(packagePath, []byte(`{invalid json`), 0644); err != nil {
+		t.Fatalf("failed to write package.json: %v", err)
+	}
+
+	exitCode := Run([]string{"validate", "-c", configPath}, &stdout, &stderr)
+
+	if exitCode != 1 {
+		t.Fatalf("expected exit code 1, got %d", exitCode)
+	}
+	if !strings.Contains(stderr.String(), "Invalid package.json found") {
+		t.Fatalf("expected stderr to mention invalid package.json, got %q", stderr.String())
+	}
+}
+
+func TestRunDeployDelegatesToPythonCLI(t *testing.T) {
+	t.Setenv("LANGGRAPH_CALLING_PYTHON", "/custom/python")
+
+	originalRunPythonSubprocess := runPythonSubprocess
+	t.Cleanup(func() {
+		runPythonSubprocess = originalRunPythonSubprocess
+	})
+
+	var gotPython string
+	var gotArgs []string
+	runPythonSubprocess = func(
+		pythonExe string,
+		args []string,
+		stdout io.Writer,
+		stderr io.Writer,
+	) error {
+		gotPython = pythonExe
+		gotArgs = append([]string(nil), args...)
+		return nil
+	}
+
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	exitCode := Run([]string{"deploy", "--remote", "--install-command", "make deps"}, &stdout, &stderr)
+
+	if exitCode != 0 {
+		t.Fatalf("expected exit code 0, got %d; stderr: %q", exitCode, stderr.String())
+	}
+	if gotPython != "/custom/python" {
+		t.Fatalf("expected delegated python to be /custom/python, got %q", gotPython)
+	}
+	expected := []string{"-m", "langgraph_cli.cli", "deploy", "--remote", "--install-command", "make deps"}
+	if strings.Join(gotArgs, "\x00") != strings.Join(expected, "\x00") {
+		t.Fatalf("unexpected delegated args: got %q want %q", gotArgs, expected)
+	}
+}
@@ -0,0 +1,258 @@
+// Package templates provides template definitions and project scaffolding
+// for the LangGraph CLI `new` command.
+package templates
+
+import (
+	"archive/zip"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+)
+
+// Template describes a project template with language-specific download URLs.
+type Template struct {
+	Name        string
+	Description string
+	Languages   map[string]string // lang -> download URL
+}
+
+// Templates is the ordered list of available project templates.
+var Templates = []Template{
+	{
+		Name:        "Deep Agent",
+		Description: "An opinionated deployment template for a Deep Agent.",
+		Languages: map[string]string{
+			"python": "https://github.com/langchain-ai/deep-agent-template/archive/refs/heads/main.zip",
+			"js":     "https://github.com/langchain-ai/deep-agent-template-js/archive/refs/heads/main.zip",
+		},
+	},
+	{
+		Name:        "Agent",
+		Description: "A simple agent that can be flexibly extended to many tools.",
+		Languages: map[string]string{
+			"python": "https://github.com/langchain-ai/simple-agent-template/archive/refs/heads/main.zip",
+		},
+	},
+	{
+		Name:        "New LangGraph Project",
+		Description: "A simple, minimal chatbot with memory.",
+		Languages: map[string]string{
+			"python": "https://github.com/langchain-ai/new-langgraph-project/archive/refs/heads/main.zip",
+			"js":     "https://github.com/langchain-ai/new-langgraphjs-project/archive/refs/heads/main.zip",
+		},
+	},
+}
+
+// templateIDEntry maps a template ID to its download URL, template name, and language.
+type templateIDEntry struct {
+	URL      string
+	Name     string
+	Language string
+}
+
+// templateIDMap is built once at init time from the Templates slice.
+var templateIDMap map[string]templateIDEntry
+
+func init() {
+	templateIDMap = make(map[string]templateIDEntry)
+	for _, t := range Templates {
+		for lang, url := range t.Languages {
+			if lang != "python" && lang != "js" {
+				continue
+			}
+			id := toTemplateID(t.Name, lang)
+			templateIDMap[id] = templateIDEntry{
+				URL:      url,
+				Name:     t.Name,
+				Language: lang,
+			}
+		}
+	}
+}
+
+// toTemplateID converts a template name and language into a slug like "deep-agent-python".
+func toTemplateID(name, lang string) string {
+	return strings.ToLower(strings.ReplaceAll(name, " ", "-")) + "-" + lang
+}
+
+// ListTemplateIDs returns a sorted list of all available template IDs.
+func ListTemplateIDs() []string {
+	ids := make([]string, 0, len(templateIDMap))
+	for id := range templateIDMap {
+		ids = append(ids, id)
+	}
+	sort.Strings(ids)
+	return ids
+}
+
+// TemplateHelp returns a formatted help string listing available templates.
+func TemplateHelp() string {
+	var b strings.Builder
+	b.WriteString("The name of the template to use. Available options:\n")
+	for _, id := range ListTemplateIDs() {
+		entry := templateIDMap[id]
+		// Find the description from the Templates slice.
+		var desc string
+		for _, t := range Templates {
+			if t.Name == entry.Name {
+				desc = t.Description
+				break
+			}
+		}
+		fmt.Fprintf(&b, "  %s: %s\n", id, desc)
+	}
+	return b.String()
+}
+
+// CreateNew creates a new LangGraph project at path using the given templateID.
+//
+// If templateID is empty an error listing available templates is returned (the
+// Go CLI is non-interactive, so we cannot prompt).  If path is empty an error
+// is returned.
+func CreateNew(path, templateID string) error {
+	if path == "" {
+		return fmt.Errorf("path is required: specify the directory for the new project")
+	}
+
+	// Resolve to absolute path.
+	absPath, err := filepath.Abs(path)
+	if err != nil {
+		return fmt.Errorf("cannot resolve path: %w", err)
+	}
+	path = absPath
+
+	// Check if path exists and is not empty.
+	entries, err := os.ReadDir(path)
+	if err == nil && len(entries) > 0 {
+		return fmt.Errorf(
+			"the specified directory already exists and is not empty: %s. "+
+				"Aborting to prevent overwriting files", path)
+	}
+
+	if templateID == "" {
+		return fmt.Errorf(
+			"template is required. Use one of the following template IDs:\n%s",
+			TemplateHelp())
+	}
+
+	entry, ok := templateIDMap[templateID]
+	if !ok {
+		var sb strings.Builder
+		sb.WriteString(fmt.Sprintf("template %q not found.\n", templateID))
+		sb.WriteString("Please select from the available options:\n")
+		for _, id := range ListTemplateIDs() {
+			e := templateIDMap[id]
+			var desc string
+			for _, t := range Templates {
+				if t.Name == e.Name {
+					desc = t.Description
+					break
+				}
+			}
+			fmt.Fprintf(&sb, "  - %s: %s\n", id, desc)
+		}
+		return fmt.Errorf("%s", sb.String())
+	}
+
+	if err := DownloadAndExtract(entry.URL, path); err != nil {
+		return fmt.Errorf("failed to download template: %w", err)
+	}
+
+	return nil
+}
+
+// DownloadAndExtract downloads a ZIP archive from url and extracts it to
+// destPath, stripping the top-level wrapper directory that GitHub includes
+// in repository archives.
+func DownloadAndExtract(url, destPath string) error {
+	// Ensure destination directory exists.
+	if err := os.MkdirAll(destPath, 0o755); err != nil {
+		return fmt.Errorf("cannot create destination directory: %w", err)
+	}
+
+	// Download to a temporary file.
+	tmpFile, err := os.CreateTemp("", "langgraph-template-*.zip")
+	if err != nil {
+		return fmt.Errorf("cannot create temp file: %w", err)
+	}
+	tmpPath := tmpFile.Name()
+	defer os.Remove(tmpPath)
+
+	resp, err := http.Get(url) //nolint:gosec
+	if err != nil {
+		tmpFile.Close()
+		return fmt.Errorf("HTTP request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		tmpFile.Close()
+		return fmt.Errorf("HTTP %d: failed to download %s", resp.StatusCode, url)
+	}
+
+	if _, err := io.Copy(tmpFile, resp.Body); err != nil {
+		tmpFile.Close()
+		return fmt.Errorf("failed to write ZIP data: %w", err)
+	}
+	tmpFile.Close()
+
+	// Open the ZIP archive.
+	zr, err := zip.OpenReader(tmpPath)
+	if err != nil {
+		return fmt.Errorf("failed to open ZIP archive: %w", err)
+	}
+	defer zr.Close()
+
+	for _, f := range zr.File {
+		// Strip the first path component (GitHub's wrapper directory).
+		parts := strings.SplitN(f.Name, "/", 2)
+		if len(parts) < 2 || parts[1] == "" {
+			continue // skip the wrapper directory entry itself
+		}
+		relPath := parts[1]
+
+		outPath := filepath.Join(destPath, relPath)
+
+		// Ensure the output path is within destPath (zip-slip protection).
+		if !strings.HasPrefix(filepath.Clean(outPath), filepath.Clean(destPath)+string(os.PathSeparator)) {
+			continue
+		}
+
+		if f.FileInfo().IsDir() {
+			if err := os.MkdirAll(outPath, f.Mode()); err != nil {
+				return fmt.Errorf("cannot create directory %s: %w", outPath, err)
+			}
+			continue
+		}
+
+		// Create parent directories.
+		if err := os.MkdirAll(filepath.Dir(outPath), 0o755); err != nil {
+			return fmt.Errorf("cannot create parent directory: %w", err)
+		}
+
+		outFile, err := os.OpenFile(outPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, f.Mode())
+		if err != nil {
+			return fmt.Errorf("cannot create file %s: %w", outPath, err)
+		}
+
+		rc, err := f.Open()
+		if err != nil {
+			outFile.Close()
+			return fmt.Errorf("cannot read ZIP entry %s: %w", f.Name, err)
+		}
+
+		if _, err := io.Copy(outFile, rc); err != nil {
+			rc.Close()
+			outFile.Close()
+			return fmt.Errorf("failed writing %s: %w", outPath, err)
+		}
+		rc.Close()
+		outFile.Close()
+	}
+
+	return nil
+}
@@ -0,0 +1,7 @@
+package version
+
+var (
+	Version = "dev"
+	Commit  = "unknown"
+	Date    = "unknown"
+)
@@ -21,25 +21,25 @@
    "test:all": "yarn test && yarn test:int && yarn lint:langgraph"
  },
  "dependencies": {
-    "@langchain/core": "^1.1.42",
-    "@langchain/langgraph": "^1.2.9"
+    "@langchain/core": "^1.1.38",
+    "@langchain/langgraph": "^1.2.6"
  },
  "devDependencies": {
    "@eslint/eslintrc": "^3.3.5",
    "@eslint/js": "^10.0.1",
    "@tsconfig/recommended": "^1.0.13",
    "@types/jest": "^30.0.0",
-    "@typescript-eslint/eslint-plugin": "^8.59.1",
-    "@typescript-eslint/parser": "^8.59.1",
-    "dotenv": "^17.4.2",
-    "eslint": "^10.2.1",
+    "@typescript-eslint/eslint-plugin": "^8.58.0",
+    "@typescript-eslint/parser": "^8.58.0",
+    "dotenv": "^17.3.1",
+    "eslint": "^10.1.0",
    "eslint-config-prettier": "^10.1.8",
    "eslint-plugin-import": "^2.32.0",
    "eslint-plugin-no-instanceof": "^1.0.1",
    "eslint-plugin-prettier": "^5.5.5",
    "jest": "^30.3.0",
-    "prettier": "^3.8.3",
-    "ts-jest": "^29.4.9",
+    "prettier": "^3.8.1",
+    "ts-jest": "^29.4.6",
    "typescript": "^5.9.3"
  }
 }
@@ -474,26 +474,26 @@
  resolved "https://registry.yarnpkg.com/@eslint-community/regexpp/-/regexpp-4.12.2.tgz#bccdf615bcf7b6e8db830ec0b8d21c9a25de597b"
  integrity sha512-EriSTlt5OC9/7SXkRSCAhfSxxoSUgBm33OH+IkwbdpgoqsSsUg7y3uh+IICI/Qg4BBWr3U2i39RpmycbxMq4ew==

-"@eslint/config-array@^0.23.5":
-  version "0.23.5"
-  resolved "https://registry.yarnpkg.com/@eslint/config-array/-/config-array-0.23.5.tgz#56e86d243049195d8acc0c06a1b3dfdc3fa3de95"
-  integrity sha512-Y3kKLvC1dvTOT+oGlqNQ1XLqK6D1HU2YXPc52NmAlJZbMMWDzGYXMiPRJ8TYD39muD/OTjlZmNJ4ib7dvSrMBA==
+"@eslint/config-array@^0.23.3":
+  version "0.23.3"
+  resolved "https://registry.yarnpkg.com/@eslint/config-array/-/config-array-0.23.3.tgz#3f4a93dd546169c09130cbd10f2415b13a20a219"
+  integrity sha512-j+eEWmB6YYLwcNOdlwQ6L2OsptI/LO6lNBuLIqe5R7RetD658HLoF+Mn7LzYmAWWNNzdC6cqP+L6r8ujeYXWLw==
  dependencies:
-    "@eslint/object-schema" "^3.0.5"
+    "@eslint/object-schema" "^3.0.3"
    debug "^4.3.1"
    minimatch "^10.2.4"

-"@eslint/config-helpers@^0.5.5":
-  version "0.5.5"
-  resolved "https://registry.yarnpkg.com/@eslint/config-helpers/-/config-helpers-0.5.5.tgz#ae16134e4792ac5fbdc533548a24ac1ea9f7f3ae"
-  integrity sha512-eIJYKTCECbP/nsKaaruF6LW967mtbQbsw4JTtSVkUQc9MneSkbrgPJAbKl9nWr0ZeowV8BfsarBmPpBzGelA2w==
+"@eslint/config-helpers@^0.5.3":
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/@eslint/config-helpers/-/config-helpers-0.5.3.tgz#721fe6bbb90d74b0c80d6ff2428e5bbcb002becb"
+  integrity sha512-lzGN0onllOZCGroKJmRwY6QcEHxbjBw1gwB8SgRSqK8YbbtEXMvKynsXc3553ckIEBxsbMBU7oOZXKIPGZNeZw==
  dependencies:
-    "@eslint/core" "^1.2.1"
+    "@eslint/core" "^1.1.1"

-"@eslint/core@^1.2.1":
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/@eslint/core/-/core-1.2.1.tgz#c1da7cd1b82fa8787f98b5629fb811848a1b63ce"
-  integrity sha512-MwcE1P+AZ4C6DWlpin/OmOA54mmIZ/+xZuJiQd4SyB29oAJjN30UW9wkKNptW2ctp4cEsvhlLY/CsQ1uoHDloQ==
+"@eslint/core@^1.1.1":
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@eslint/core/-/core-1.1.1.tgz#450f3d2be2d463ccd51119544092256b4e88df32"
+  integrity sha512-QUPblTtE51/7/Zhfv8BDwO0qkkzQL7P/aWWbqcf4xWLEYn1oKjdO0gglQBB4GAsu7u6wjijbCmzsUTy6mnk6oQ==
  dependencies:
    "@types/json-schema" "^7.0.15"

@@ -517,17 +517,17 @@
  resolved "https://registry.yarnpkg.com/@eslint/js/-/js-10.0.1.tgz#1e8a876f50117af8ab67e47d5ad94d38d6622583"
  integrity sha512-zeR9k5pd4gxjZ0abRoIaxdc7I3nDktoXZk2qOv9gCNWx3mVwEn32VRhyLaRsDiJjTs0xq/T8mfPtyuXu7GWBcA==

-"@eslint/object-schema@^3.0.5":
-  version "3.0.5"
-  resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.5.tgz#88e9bf4d11d2b19c082e78ebe7ce88724a5eb091"
-  integrity sha512-vqTaUEgxzm+YDSdElad6PiRoX4t8VGDjCtt05zn4nU810UIx/uNEV7/lZJ6KwFThKZOzOxzXy48da+No7HZaMw==
+"@eslint/object-schema@^3.0.3":
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.3.tgz#5bf671e52e382e4adc47a9906f2699374637db6b"
+  integrity sha512-iM869Pugn9Nsxbh/YHRqYiqd23AmIbxJOcpUMOuWCVNdoQJ5ZtwL6h3t0bcZzJUlC3Dq9jCFCESBZnX0GTv7iQ==

-"@eslint/plugin-kit@^0.7.1":
-  version "0.7.1"
-  resolved "https://registry.yarnpkg.com/@eslint/plugin-kit/-/plugin-kit-0.7.1.tgz#c4125fd015eceeb09b793109fdbcd4dd0a02d346"
-  integrity sha512-rZAP3aVgB9ds9KOeUSL+zZ21hPmo8dh6fnIFwRQj5EAZl9gzR7wxYbYXYysAM8CTqGmUGyp2S4kUdV17MnGuWQ==
+"@eslint/plugin-kit@^0.6.1":
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/@eslint/plugin-kit/-/plugin-kit-0.6.1.tgz#eb9e6689b56ce8bc1855bb33090e63f3fc115e8e"
+  integrity sha512-iH1B076HoAshH1mLpHMgwdGeTs0CYwL0SPMkGuSebZrwBp16v415e9NZXg2jtrqPVQjf6IANe2Vtlr5KswtcZQ==
  dependencies:
-    "@eslint/core" "^1.2.1"
+    "@eslint/core" "^1.1.1"
    levn "^0.4.1"

 "@humanfs/core@^0.19.1":
@@ -890,10 +890,10 @@
    "@jridgewell/resolve-uri" "^3.1.0"
    "@jridgewell/sourcemap-codec" "^1.4.14"

-"@langchain/core@^1.1.42":
-  version "1.1.42"
-  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.42.tgz#607bfd34c1414c9cbeb2859fda1b254a14c28085"
-  integrity sha512-d0tN96BrwPMryYyWR9VfyAntSivn7EQrZCe5Kpxum93tcjTXbKKmKvItFec8AluQt88iTcmAJrahUZUNfzGwTA==
+"@langchain/core@^1.1.38":
+  version "1.1.38"
+  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.38.tgz#b5939b2e77af408771c9bb95bf56a5ad8183313e"
+  integrity sha512-C340wH1YL10CiVOFlEpQMp0zQE85/eBLKX/gi1Lv7shAyUmR3CQ0t/mXlCd5RsZa6ntAN1kDJnp64ArWey9XAA==
  dependencies:
    "@cfworker/json-schema" "^4.0.2"
    "@standard-schema/spec" "^1.1.0"
@@ -904,6 +904,7 @@
    langsmith ">=0.5.0 <1.0.0"
    mustache "^4.2.0"
    p-queue "^6.6.2"
+    uuid "^11.1.0"
    zod "^3.25.76 || ^4"

 "@langchain/langgraph-checkpoint@^1.0.1":
@@ -913,23 +914,23 @@
  dependencies:
    uuid "^10.0.0"

-"@langchain/langgraph-sdk@~1.8.9":
-  version "1.8.10"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.8.10.tgz#bd175cda1ab629845ef28b22b45f3bdd1f65b029"
-  integrity sha512-wrB3rkRw5KAmsqezwvKP3midT4qJrV6Hj9XJMYo+cbvXC4HYpSAmyY/VriSyeTFRbLG/OP/pY2Yz+9Z54nSaXQ==
+"@langchain/langgraph-sdk@~1.8.1":
+  version "1.8.3"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.8.3.tgz#deedc9bddd863693c6ab5f3a74058548b040377d"
+  integrity sha512-Py0S5yVtlOHz410aEsSGLRKjtsK2giDvfPS1JjAjTdcs71khuJufFtUZFwmwdJCbsG4DaGurRLHOAJu9jO4a0g==
  dependencies:
    "@types/json-schema" "^7.0.15"
    p-queue "^9.0.1"
    p-retry "^7.1.1"
    uuid "^13.0.0"

-"@langchain/langgraph@^1.2.9":
-  version "1.2.9"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.2.9.tgz#4f0ba159062c3649c83cf5f621ef926b96933e32"
-  integrity sha512-3c7BtGycHC2v9p6w/Hv8L7kEl1YnZYOQTDJtmAp3knk6JOedO7d2bYP3y0SRyhv5orUEGf/KGvx8ZsB/ideP7g==
+"@langchain/langgraph@^1.2.6":
+  version "1.2.6"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.2.6.tgz#e6a578f96fbbc1c54ba78e0298884671dad5d195"
+  integrity sha512-5cX402dNGN6w9+0mlMU2dgUiKx6Y1tlENp7x05e9ByDbQCHSDc0kyqRWNFLGc7vatQ92S4ylxQrcCJvi8Fr4SQ==
  dependencies:
    "@langchain/langgraph-checkpoint" "^1.0.1"
-    "@langchain/langgraph-sdk" "~1.8.9"
+    "@langchain/langgraph-sdk" "~1.8.1"
    "@standard-schema/spec" "1.1.0"
    uuid "^10.0.0"

@@ -1085,6 +1086,11 @@
  resolved "https://registry.yarnpkg.com/@types/stack-utils/-/stack-utils-2.0.3.tgz#6209321eb2c1712a7e7466422b8cb1fc0d9dd5d8"
  integrity sha512-9aEbYZ3TbYMznPdcdr3SmIrLXwC/AKZXQeCf9Pgao5CKb8CyHuEX5jzWPTkvregvhRJHcpRO6BFoGW9ycaOkYw==

+"@types/uuid@^10.0.0":
+  version "10.0.0"
+  resolved "https://registry.yarnpkg.com/@types/uuid/-/uuid-10.0.0.tgz#e9c07fe50da0f53dc24970cca94d619ff03f6f6d"
+  integrity sha512-7gqG38EyHgyP1S+7+xomFtL+ZNHcKv6DwNaCZmJmo1vgMugyF3TCnXVg4t1uk89mLNwnLtnY3TpOpCOyp1/xHQ==
+
 "@types/yargs-parser@*":
  version "21.0.3"
  resolved "https://registry.yarnpkg.com/@types/yargs-parser/-/yargs-parser-21.0.3.tgz#815e30b786d2e8f0dcd85fd5bcf5e1a04d008f15"
@@ -1097,100 +1103,100 @@
  dependencies:
    "@types/yargs-parser" "*"

-"@typescript-eslint/eslint-plugin@^8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.59.1.tgz#781bc6f9002982cfaf75a185240e24ad7276628a"
-  integrity sha512-BOziFIfE+6osHO9FoJG4zjoHUcvI7fTNBSpdAwrNH0/TLvzjsk2oo8XSSOT2HhqUyhZPfHv4UOffoJ9oEEQ7Ag==
+"@typescript-eslint/eslint-plugin@^8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.58.0.tgz#ad40e492f1931f46da1bd888e52b9e56df9063aa"
+  integrity sha512-RLkVSiNuUP1C2ROIWfqX+YcUfLaSnxGE/8M+Y57lopVwg9VTYYfhuz15Yf1IzCKgZj6/rIbYTmJCUSqr76r0Wg==
  dependencies:
    "@eslint-community/regexpp" "^4.12.2"
-    "@typescript-eslint/scope-manager" "8.59.1"
-    "@typescript-eslint/type-utils" "8.59.1"
-    "@typescript-eslint/utils" "8.59.1"
-    "@typescript-eslint/visitor-keys" "8.59.1"
+    "@typescript-eslint/scope-manager" "8.58.0"
+    "@typescript-eslint/type-utils" "8.58.0"
+    "@typescript-eslint/utils" "8.58.0"
+    "@typescript-eslint/visitor-keys" "8.58.0"
    ignore "^7.0.5"
    natural-compare "^1.4.0"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/parser@^8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.59.1.tgz#835d20a62350659a082a1ae2a60b822c40488905"
-  integrity sha512-HDQH9O/47Dxi1ceDhBXdaldtf/WV9yRYMjbjCuNk3qnaTD564qwv61Y7+gTxwxRKzSrgO5uhtw584igXVuuZkA==
+"@typescript-eslint/parser@^8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.58.0.tgz#da04ece1967b6c2fe8f10c3473dabf3825795ef7"
+  integrity sha512-rLoGZIf9afaRBYsPUMtvkDWykwXwUPL60HebR4JgTI8mxfFe2cQTu3AGitANp4b9B2QlVru6WzjgB2IzJKiCSA==
  dependencies:
-    "@typescript-eslint/scope-manager" "8.59.1"
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/typescript-estree" "8.59.1"
-    "@typescript-eslint/visitor-keys" "8.59.1"
+    "@typescript-eslint/scope-manager" "8.58.0"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/typescript-estree" "8.58.0"
+    "@typescript-eslint/visitor-keys" "8.58.0"
    debug "^4.4.3"

-"@typescript-eslint/project-service@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.59.1.tgz#49efe87c37ef84262f23df8bf62fdc56698ca6fe"
-  integrity sha512-+MuHQlHiEr00Of/IQbE/MmEoi44znZHbR/Pz7Opq4HryUOlRi+/44dro9Ycy8Fyo+/024IWtw8m4JUMCGTYxDg==
+"@typescript-eslint/project-service@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.58.0.tgz#66ceda0aabf7427aec3e2713fa43eb278dead2aa"
+  integrity sha512-8Q/wBPWLQP1j16NxoPNIKpDZFMaxl7yWIoqXWYeWO+Bbd2mjgvoF0dxP2jKZg5+x49rgKdf7Ck473M8PC3V9lg==
  dependencies:
-    "@typescript-eslint/tsconfig-utils" "^8.59.1"
-    "@typescript-eslint/types" "^8.59.1"
+    "@typescript-eslint/tsconfig-utils" "^8.58.0"
+    "@typescript-eslint/types" "^8.58.0"
    debug "^4.4.3"

-"@typescript-eslint/scope-manager@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.59.1.tgz#ed90d054fc3db2d0c81464db3a953a94fb85bb58"
-  integrity sha512-LwuHQI4pDOYVKvmH2dkaJo6YZCSgouVgnS/z7yBPKBMvgtBvyLqiLy9Z6b7+m/TRcX1NFYUqZetI5Y+aT4GEfg==
+"@typescript-eslint/scope-manager@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.58.0.tgz#e304142775e49a1b7ac3c8bf2536714447c72cab"
+  integrity sha512-W1Lur1oF50FxSnNdGp3Vs6P+yBRSmZiw4IIjEeYxd8UQJwhUF0gDgDD/W/Tgmh73mxgEU3qX0Bzdl/NGuSPEpQ==
  dependencies:
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/visitor-keys" "8.59.1"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/visitor-keys" "8.58.0"

-"@typescript-eslint/tsconfig-utils@8.59.1", "@typescript-eslint/tsconfig-utils@^8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.59.1.tgz#ba2a779a444f1d5cb92a606f9b209d239fd4cab1"
-  integrity sha512-/0nEyPbX7gRsk0Uwfe4ALwwgxuA66d/l2mhRDNlAvaj4U3juhUtJNq0DsY8M2AYwwb9rEq2hrC3IcIcEt++iJA==
+"@typescript-eslint/tsconfig-utils@8.58.0", "@typescript-eslint/tsconfig-utils@^8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.58.0.tgz#c5a8edb21f31e0fdee565724e1b984171c559482"
+  integrity sha512-doNSZEVJsWEu4htiVC+PR6NpM+pa+a4ClH9INRWOWCUzMst/VA9c4gXq92F8GUD1rwhNvRLkgjfYtFXegXQF7A==

-"@typescript-eslint/type-utils@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.59.1.tgz#9c83d3f2ed9187a815e8120f72c08317e513e409"
-  integrity sha512-klWPBR2ciQHS3f++ug/mVnWKPjBUo7icEL3FAO1lhAR1Z1i5NQYZ1EannMSRYcq5qCv5wNALlXr6fksRHyYl7w==
+"@typescript-eslint/type-utils@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.58.0.tgz#ce0e72cd967ffbbe8de322db6089bd4374be352f"
+  integrity sha512-aGsCQImkDIqMyx1u4PrVlbi/krmDsQUs4zAcCV6M7yPcPev+RqVlndsJy9kJ8TLihW9TZ0kbDAzctpLn5o+lOg==
  dependencies:
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/typescript-estree" "8.59.1"
-    "@typescript-eslint/utils" "8.59.1"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/typescript-estree" "8.58.0"
+    "@typescript-eslint/utils" "8.58.0"
    debug "^4.4.3"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/types@8.59.1", "@typescript-eslint/types@^8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.59.1.tgz#c1d014d3f03a97e0113a8899fc9d4e45a7fb0ca9"
-  integrity sha512-ZDCjgccSdYPw5Bxh+my4Z0lJU96ZDN7jbBzvmEn0FZx3RtU1C7VWl6NbDx94bwY3V5YsgwRzJPOgeY2Q/nLG8A==
+"@typescript-eslint/types@8.58.0", "@typescript-eslint/types@^8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.58.0.tgz#e94ae7abdc1c6530e71183c1007b61fa93112a5a"
+  integrity sha512-O9CjxypDT89fbHxRfETNoAnHj/i6IpRK0CvbVN3qibxlLdo5p5hcLmUuCCrHMpxiWSwKyI8mCP7qRNYuOJ0Uww==

-"@typescript-eslint/typescript-estree@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.59.1.tgz#4391fadf98a22c869c5b6522dbf4e491e53e351a"
-  integrity sha512-OUd+vJS05sSkOip+BkZ/2NS8RMxrAAJemsC6vU3kmfLyeaJT0TftHkV9mcx2107MmsBVXXexhVu4F0TZXyMl4g==
+"@typescript-eslint/typescript-estree@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.58.0.tgz#ed233faa8e2f2a2e1357c3e7d553d6465a0ee59a"
+  integrity sha512-7vv5UWbHqew/dvs+D3e1RvLv1v2eeZ9txRHPnEEBUgSNLx5ghdzjHa0sgLWYVKssH+lYmV0JaWdoubo0ncGYLA==
  dependencies:
-    "@typescript-eslint/project-service" "8.59.1"
-    "@typescript-eslint/tsconfig-utils" "8.59.1"
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/visitor-keys" "8.59.1"
+    "@typescript-eslint/project-service" "8.58.0"
+    "@typescript-eslint/tsconfig-utils" "8.58.0"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/visitor-keys" "8.58.0"
    debug "^4.4.3"
    minimatch "^10.2.2"
    semver "^7.7.3"
    tinyglobby "^0.2.15"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/utils@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.59.1.tgz#cf6204d69701bbbc5b150f98c18aeef0a42c10bd"
-  integrity sha512-3pIeoXhCeYH9FSCBI8P3iNwJlGuzPlYKkTlen2O9T1DSeeg8UG8jstq6BLk+Mda0qup7mgk4z4XL4OzRaxZ8LA==
+"@typescript-eslint/utils@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.58.0.tgz#21a74a7963b0d288b719a4121c7dd555adaab3c3"
+  integrity sha512-RfeSqcFeHMHlAWzt4TBjWOAtoW9lnsAGiP3GbaX9uVgTYYrMbVnGONEfUCiSss+xMHFl+eHZiipmA8WkQ7FuNA==
  dependencies:
    "@eslint-community/eslint-utils" "^4.9.1"
-    "@typescript-eslint/scope-manager" "8.59.1"
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/typescript-estree" "8.59.1"
+    "@typescript-eslint/scope-manager" "8.58.0"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/typescript-estree" "8.58.0"

-"@typescript-eslint/visitor-keys@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.59.1.tgz#b5cba576287a3eeb0b400b62813189abcc3f976a"
-  integrity sha512-LdDNl6C5iJExcM0Yh0PwAIBb9PrSiCsWamF/JyEZawm3kFDnRoaq3LGE4bpyRao/fWeGKKyw7icx0YxrLFC5Cg==
+"@typescript-eslint/visitor-keys@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.58.0.tgz#2abd55a4be70fd55967aceaba4330b9ba9f45189"
+  integrity sha512-XJ9UD9+bbDo4a4epraTwG3TsNPeiB9aShrUneAVXy8q4LuwowN+qu89/6ByLMINqvIMeI9H9hOHQtg/ijrYXzQ==
  dependencies:
-    "@typescript-eslint/types" "8.59.1"
+    "@typescript-eslint/types" "8.58.0"
    eslint-visitor-keys "^5.0.0"

 "@ungap/structured-clone@^1.3.0":
@@ -1776,6 +1782,13 @@ concat-map@0.0.1:
  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
  integrity sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==

+console-table-printer@^2.12.1:
+  version "2.15.0"
+  resolved "https://registry.yarnpkg.com/console-table-printer/-/console-table-printer-2.15.0.tgz#5c808204640b8f024d545bde8aabe5d344dfadc1"
+  integrity sha512-SrhBq4hYVjLCkBVOWaTzceJalvn5K1Zq5aQA6wXC/cYjI3frKWNPEMK3sZsJfNNQApvCQmgBcc13ZKmFj8qExw==
+  dependencies:
+    simple-wcswidth "^1.1.2"
+
 convert-source-map@^2.0.0:
  version "2.0.0"
  resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-2.0.0.tgz#4b560f649fc4e918dd0ab75cf4961e8bc882d82a"
@@ -1908,10 +1921,10 @@ doctrine@^2.1.0:
  dependencies:
    esutils "^2.0.2"

-dotenv@^17.4.2:
-  version "17.4.2"
-  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-17.4.2.tgz#c07e54a746e11eba021dd9e1047ced5afdc1c034"
-  integrity sha512-nI4U3TottKAcAD9LLud4Cb7b2QztQMUEfHbvhTH09bqXTxnSie8WnjPALV/WMCrJZ6UV/qHJ6L03OqO3LcdYZw==
+dotenv@^17.3.1:
+  version "17.3.1"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-17.3.1.tgz#2706f5b0165e45a1503348187b8468f87fe6aae2"
+  integrity sha512-IO8C/dzEb6O3F9/twg6ZLXz164a2fhTnEWb95H23Dm4OuN+92NmEAlTrupP9VW6Jm3sO26tQlqyvyi4CsnY9GA==

 dunder-proto@^1.0.0, dunder-proto@^1.0.1:
  version "1.0.1"
@@ -2262,17 +2275,17 @@ eslint-visitor-keys@^5.0.0, eslint-visitor-keys@^5.0.1:
  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz#9e3c9489697824d2d4ce3a8ad12628f91e9f59be"
  integrity sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==

-eslint@^10.2.1:
-  version "10.2.1"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.2.1.tgz#224b2a6caeb34473eddcf918762363e2e063222a"
-  integrity sha512-wiyGaKsDgqXvF40P8mDwiUp/KQjE1FdrIEJsM8PZ3XCiniTMXS3OHWWUe5FI5agoCnr8x4xPrTDZuxsBlNHl+Q==
+eslint@^10.1.0:
+  version "10.1.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.1.0.tgz#9ca98e654e642ab2e1af6d1e9d8613857ac341b4"
+  integrity sha512-S9jlY/ELKEUwwQnqWDO+f+m6sercqOPSqXM5Go94l7DOmxHVDgmSFGWEzeE/gwgTAr0W103BWt0QLe/7mabIvA==
  dependencies:
    "@eslint-community/eslint-utils" "^4.8.0"
    "@eslint-community/regexpp" "^4.12.2"
-    "@eslint/config-array" "^0.23.5"
-    "@eslint/config-helpers" "^0.5.5"
-    "@eslint/core" "^1.2.1"
-    "@eslint/plugin-kit" "^0.7.1"
+    "@eslint/config-array" "^0.23.3"
+    "@eslint/config-helpers" "^0.5.3"
+    "@eslint/core" "^1.1.1"
+    "@eslint/plugin-kit" "^0.6.1"
    "@humanfs/node" "^0.16.6"
    "@humanwhocodes/module-importer" "^1.0.1"
    "@humanwhocodes/retry" "^0.4.2"
@@ -2682,7 +2695,7 @@ graceful-fs@^4.2.11:
  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.11.tgz#4183e4e8bf08bb6e05bbb2f7d2e0c8f712ca40e3"
  integrity sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==

-handlebars@^4.7.9:
+handlebars@^4.7.8:
  version "4.7.9"
  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.9.tgz#6f139082ab58dc4e5a0e51efe7db5ae890d56a0f"
  integrity sha512-4E71E0rpOaQuJR2A3xDZ+GM1HyWYv1clR58tC8emQNeQe3RH7MAzSbat+V0wG78LQBo6m6bzSG/L4pBuCsgnUQ==
@@ -3675,12 +3688,16 @@ keyv@^4.5.4:
    json-buffer "3.0.1"

 "langsmith@>=0.5.0 <1.0.0":
-  version "0.5.20"
-  resolved "https://registry.yarnpkg.com/langsmith/-/langsmith-0.5.20.tgz#4021847d2ccd5a86c5eb96060f9bb5f19f80eca5"
-  integrity sha512-ULhLM8RswvQDXufLtNtvclHrWCBx8Cb5UPI6lAZC+8Dq59iHsVPz/3Ac9khWNm1VIvChRsuykixD/WrmzuuA3Q==
+  version "0.5.4"
+  resolved "https://registry.yarnpkg.com/langsmith/-/langsmith-0.5.4.tgz#f75b82b08e30db72a7d1d595b341e9666bd525e5"
+  integrity sha512-qYkNIoKpf0ZYt+cYzrDV+XI3FCexApmZmp8EMs3eDTMv0OvrHMLoxJ9IpkeoXJSX24+GPk0/jXjKx2hWerpy9w==
  dependencies:
-    p-queue "6.6.2"
-    uuid "10.0.0"
+    "@types/uuid" "^10.0.0"
+    chalk "^4.1.2"
+    console-table-printer "^2.12.1"
+    p-queue "^6.6.2"
+    semver "^7.6.3"
+    uuid "^10.0.0"

 leven@^3.1.0:
  version "3.1.0"
@@ -3990,7 +4007,7 @@ p-locate@^5.0.0:
  dependencies:
    p-limit "^3.0.2"

-p-queue@6.6.2, p-queue@^6.6.2:
+p-queue@^6.6.2:
  version "6.6.2"
  resolved "https://registry.yarnpkg.com/p-queue/-/p-queue-6.6.2.tgz#2068a9dcf8e67dd0ec3e7a2bcb76810faa85e426"
  integrity sha512-RwFpb72c/BhQLEXIZ5K2e+AhgNVmIejGlTgiB9MzZ0e93GRvqZ7uSi0dvRF7/XIXDeNkra2fNHBxTyPDGySpjQ==
@@ -4129,10 +4146,10 @@ prettier-linter-helpers@^1.0.1:
  dependencies:
    fast-diff "^1.1.2"

-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==
+prettier@^3.8.1:
+  version "3.8.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.8.1.tgz#edf48977cf991558f4fcbd8a3ba6015ba2a3a173"
+  integrity sha512-UOnG6LftzbdaHZcKoPFtOcCKztrQ57WkHDeRD9t/PTQtmT0NHSeWWepj6pS0z/N7+08BHFDQVUrfmfMRcZwbMg==

 pretty-format@30.2.0, pretty-format@^30.0.0:
  version "30.2.0"
@@ -4286,7 +4303,7 @@ semver@^6.3.1:
  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.1.tgz#556d2ef8689146e46dcea4bfdd095f3434dffcb4"
  integrity sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==

-semver@^7.5.3, semver@^7.5.4, semver@^7.7.2, semver@^7.7.3, semver@^7.7.4:
+semver@^7.5.3, semver@^7.5.4, semver@^7.6.3, semver@^7.7.2, semver@^7.7.3:
  version "7.7.4"
  resolved "https://registry.yarnpkg.com/semver/-/semver-7.7.4.tgz#28464e36060e991fa7a11d0279d2d3f3b57a7e8a"
  integrity sha512-vFKC2IEtQnVhpT78h1Yp8wzwrf8CM+MzKMHGJZfBtzhZNycRFnXsHk6E5TxIkkMsgNS7mdX3AGB7x2QM2di4lA==
@@ -4394,6 +4411,11 @@ signal-exit@^4.0.1:
  resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-4.1.0.tgz#952188c1cbd546070e2dd20d0f41c0ae0530cb04"
  integrity sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw==

+simple-wcswidth@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/simple-wcswidth/-/simple-wcswidth-1.1.2.tgz#66722f37629d5203f9b47c5477b1225b85d6525b"
+  integrity sha512-j7piyCjAeTDSjzTSQ7DokZtMNwNlEAyxqSZeCS+CXH7fJ4jx3FuJ/mTW3mE+6JLs4VJBbcll0Kjn+KXI5t21Iw==
+
 slash@^3.0.0:
  version "3.0.0"
  resolved "https://registry.yarnpkg.com/slash/-/slash-3.0.0.tgz#6539be870c165adbd5240220dbe361f1bc4d4634"
@@ -4622,18 +4644,18 @@ ts-api-utils@^2.5.0:
  resolved "https://registry.yarnpkg.com/ts-api-utils/-/ts-api-utils-2.5.0.tgz#4acd4a155e22734990a5ed1fe9e97f113bcb37c1"
  integrity sha512-OJ/ibxhPlqrMM0UiNHJ/0CKQkoKF243/AEmplt3qpRgkW8VG7IfOS41h7V8TjITqdByHzrjcS/2si+y4lIh8NA==

-ts-jest@^29.4.9:
-  version "29.4.9"
-  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-29.4.9.tgz#47dc33d0f5c36bddcedd16afefae285e0b049d2d"
-  integrity sha512-LTb9496gYPMCqjeDLdPrKuXtncudeV1yRZnF4Wo5l3SFi0RYEnYRNgMrFIdg+FHvfzjCyQk1cLncWVqiSX+EvQ==
+ts-jest@^29.4.6:
+  version "29.4.6"
+  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-29.4.6.tgz#51cb7c133f227396818b71297ad7409bb77106e9"
+  integrity sha512-fSpWtOO/1AjSNQguk43hb/JCo16oJDnMJf3CdEGNkqsEX3t0KX96xvyX1D7PfLCpVoKu4MfVrqUkFyblYoY4lA==
  dependencies:
    bs-logger "^0.2.6"
    fast-json-stable-stringify "^2.1.0"
-    handlebars "^4.7.9"
+    handlebars "^4.7.8"
    json5 "^2.2.3"
    lodash.memoize "^4.1.2"
    make-error "^1.3.6"
-    semver "^7.7.4"
+    semver "^7.7.3"
    type-fest "^4.41.0"
    yargs-parser "^21.1.1"

@@ -4848,11 +4870,16 @@ uri-js@^4.2.2:
  dependencies:
    punycode "^2.1.0"

-uuid@10.0.0, uuid@^10.0.0:
+uuid@^10.0.0:
  version "10.0.0"
  resolved "https://registry.yarnpkg.com/uuid/-/uuid-10.0.0.tgz#5a95aa454e6e002725c79055fd42aaba30ca6294"
  integrity sha512-8XkAphELsDnEGrDxUOHB3RGvXz6TeuYSGEZBOjtTtPm2lwhGBjLgOzLHB63IUWfBpNucQjND6d3AOudO+H3RWQ==

+uuid@^11.1.0:
+  version "11.1.0"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-11.1.0.tgz#9549028be1753bb934fc96e2bca09bb4105ae912"
+  integrity sha512-0/A9rDy9P7cJ+8w1c9WD9V//9Wj15Ce2MPz8Ri6032usz+NfePxx5AcN3bN+r6ZL6jEo066/yNYB3tn4pQEx+A==
+
 uuid@^13.0.0:
  version "13.0.0"
  resolved "https://registry.yarnpkg.com/uuid/-/uuid-13.0.0.tgz#263dc341b19b4d755eb8fe36b78d95a6b65707e8"
@@ -9,8 +9,8 @@
  },
  "dependencies": {
    "@js-monorepo-example/shared": "*",
-    "@langchain/core": "^1.1.42",
-    "@langchain/langgraph": "^1.2.9"
+    "@langchain/core": "^1.1.38",
+    "@langchain/langgraph": "^1.2.6"
  },
  "devDependencies": {
    "typescript": "^5.9.3"
@@ -17,18 +17,18 @@
    "lint": "eslint 'apps/**/*.ts' 'libs/**/*.ts'"
  },
  "devDependencies": {
-    "turbo": "^2.9.7",
+    "turbo": "^2.9.3",
    "typescript": "^5.9.3",
    "@tsconfig/recommended": "^1.0.13",
    "@eslint/eslintrc": "^3.3.5",
    "@eslint/js": "^10.0.1",
-    "eslint": "^10.2.1",
+    "eslint": "^10.1.0",
    "eslint-config-prettier": "^10.1.8",
    "eslint-plugin-import": "^2.27.5",
    "eslint-plugin-no-instanceof": "^1.0.1",
    "eslint-plugin-prettier": "^5.5.5",
-    "@typescript-eslint/eslint-plugin": "^8.59.1",
-    "@typescript-eslint/parser": "^8.59.1",
-    "prettier": "^3.8.3"
+    "@typescript-eslint/eslint-plugin": "^8.58.0",
+    "@typescript-eslint/parser": "^8.58.0",
+    "prettier": "^3.8.1"
  }
 }
@@ -19,26 +19,26 @@
  resolved "https://registry.yarnpkg.com/@eslint-community/regexpp/-/regexpp-4.12.2.tgz#bccdf615bcf7b6e8db830ec0b8d21c9a25de597b"
  integrity sha512-EriSTlt5OC9/7SXkRSCAhfSxxoSUgBm33OH+IkwbdpgoqsSsUg7y3uh+IICI/Qg4BBWr3U2i39RpmycbxMq4ew==

-"@eslint/config-array@^0.23.5":
-  version "0.23.5"
-  resolved "https://registry.yarnpkg.com/@eslint/config-array/-/config-array-0.23.5.tgz#56e86d243049195d8acc0c06a1b3dfdc3fa3de95"
-  integrity sha512-Y3kKLvC1dvTOT+oGlqNQ1XLqK6D1HU2YXPc52NmAlJZbMMWDzGYXMiPRJ8TYD39muD/OTjlZmNJ4ib7dvSrMBA==
+"@eslint/config-array@^0.23.3":
+  version "0.23.3"
+  resolved "https://registry.yarnpkg.com/@eslint/config-array/-/config-array-0.23.3.tgz#3f4a93dd546169c09130cbd10f2415b13a20a219"
+  integrity sha512-j+eEWmB6YYLwcNOdlwQ6L2OsptI/LO6lNBuLIqe5R7RetD658HLoF+Mn7LzYmAWWNNzdC6cqP+L6r8ujeYXWLw==
  dependencies:
-    "@eslint/object-schema" "^3.0.5"
+    "@eslint/object-schema" "^3.0.3"
    debug "^4.3.1"
    minimatch "^10.2.4"

-"@eslint/config-helpers@^0.5.5":
-  version "0.5.5"
-  resolved "https://registry.yarnpkg.com/@eslint/config-helpers/-/config-helpers-0.5.5.tgz#ae16134e4792ac5fbdc533548a24ac1ea9f7f3ae"
-  integrity sha512-eIJYKTCECbP/nsKaaruF6LW967mtbQbsw4JTtSVkUQc9MneSkbrgPJAbKl9nWr0ZeowV8BfsarBmPpBzGelA2w==
+"@eslint/config-helpers@^0.5.3":
+  version "0.5.3"
+  resolved "https://registry.yarnpkg.com/@eslint/config-helpers/-/config-helpers-0.5.3.tgz#721fe6bbb90d74b0c80d6ff2428e5bbcb002becb"
+  integrity sha512-lzGN0onllOZCGroKJmRwY6QcEHxbjBw1gwB8SgRSqK8YbbtEXMvKynsXc3553ckIEBxsbMBU7oOZXKIPGZNeZw==
  dependencies:
-    "@eslint/core" "^1.2.1"
+    "@eslint/core" "^1.1.1"

-"@eslint/core@^1.2.1":
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/@eslint/core/-/core-1.2.1.tgz#c1da7cd1b82fa8787f98b5629fb811848a1b63ce"
-  integrity sha512-MwcE1P+AZ4C6DWlpin/OmOA54mmIZ/+xZuJiQd4SyB29oAJjN30UW9wkKNptW2ctp4cEsvhlLY/CsQ1uoHDloQ==
+"@eslint/core@^1.1.1":
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@eslint/core/-/core-1.1.1.tgz#450f3d2be2d463ccd51119544092256b4e88df32"
+  integrity sha512-QUPblTtE51/7/Zhfv8BDwO0qkkzQL7P/aWWbqcf4xWLEYn1oKjdO0gglQBB4GAsu7u6wjijbCmzsUTy6mnk6oQ==
  dependencies:
    "@types/json-schema" "^7.0.15"

@@ -62,17 +62,17 @@
  resolved "https://registry.yarnpkg.com/@eslint/js/-/js-10.0.1.tgz#1e8a876f50117af8ab67e47d5ad94d38d6622583"
  integrity sha512-zeR9k5pd4gxjZ0abRoIaxdc7I3nDktoXZk2qOv9gCNWx3mVwEn32VRhyLaRsDiJjTs0xq/T8mfPtyuXu7GWBcA==

-"@eslint/object-schema@^3.0.5":
-  version "3.0.5"
-  resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.5.tgz#88e9bf4d11d2b19c082e78ebe7ce88724a5eb091"
-  integrity sha512-vqTaUEgxzm+YDSdElad6PiRoX4t8VGDjCtt05zn4nU810UIx/uNEV7/lZJ6KwFThKZOzOxzXy48da+No7HZaMw==
+"@eslint/object-schema@^3.0.3":
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/@eslint/object-schema/-/object-schema-3.0.3.tgz#5bf671e52e382e4adc47a9906f2699374637db6b"
+  integrity sha512-iM869Pugn9Nsxbh/YHRqYiqd23AmIbxJOcpUMOuWCVNdoQJ5ZtwL6h3t0bcZzJUlC3Dq9jCFCESBZnX0GTv7iQ==

-"@eslint/plugin-kit@^0.7.1":
-  version "0.7.1"
-  resolved "https://registry.yarnpkg.com/@eslint/plugin-kit/-/plugin-kit-0.7.1.tgz#c4125fd015eceeb09b793109fdbcd4dd0a02d346"
-  integrity sha512-rZAP3aVgB9ds9KOeUSL+zZ21hPmo8dh6fnIFwRQj5EAZl9gzR7wxYbYXYysAM8CTqGmUGyp2S4kUdV17MnGuWQ==
+"@eslint/plugin-kit@^0.6.1":
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/@eslint/plugin-kit/-/plugin-kit-0.6.1.tgz#eb9e6689b56ce8bc1855bb33090e63f3fc115e8e"
+  integrity sha512-iH1B076HoAshH1mLpHMgwdGeTs0CYwL0SPMkGuSebZrwBp16v415e9NZXg2jtrqPVQjf6IANe2Vtlr5KswtcZQ==
  dependencies:
-    "@eslint/core" "^1.2.1"
+    "@eslint/core" "^1.1.1"
    levn "^0.4.1"

 "@humanfs/core@^0.19.1":
@@ -103,10 +103,10 @@
  resolved "https://registry.yarnpkg.com/@isaacs/cliui/-/cliui-9.0.0.tgz#4d0a3f127058043bf2e7ee169eaf30ed901302f3"
  integrity sha512-AokJm4tuBHillT+FpMtxQ60n8ObyXBatq7jD2/JA9dxbDDokKQm8KMht5ibGzLVU9IJDIKK4TPKgMHEYMn3lMg==

-"@langchain/core@^1.1.42":
-  version "1.1.42"
-  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.42.tgz#607bfd34c1414c9cbeb2859fda1b254a14c28085"
-  integrity sha512-d0tN96BrwPMryYyWR9VfyAntSivn7EQrZCe5Kpxum93tcjTXbKKmKvItFec8AluQt88iTcmAJrahUZUNfzGwTA==
+"@langchain/core@^1.1.38":
+  version "1.1.38"
+  resolved "https://registry.yarnpkg.com/@langchain/core/-/core-1.1.38.tgz#b5939b2e77af408771c9bb95bf56a5ad8183313e"
+  integrity sha512-C340wH1YL10CiVOFlEpQMp0zQE85/eBLKX/gi1Lv7shAyUmR3CQ0t/mXlCd5RsZa6ntAN1kDJnp64ArWey9XAA==
  dependencies:
    "@cfworker/json-schema" "^4.0.2"
    "@standard-schema/spec" "^1.1.0"
@@ -117,6 +117,7 @@
    langsmith ">=0.5.0 <1.0.0"
    mustache "^4.2.0"
    p-queue "^6.6.2"
+    uuid "^11.1.0"
    zod "^3.25.76 || ^4"

 "@langchain/langgraph-checkpoint@^1.0.1":
@@ -126,23 +127,23 @@
  dependencies:
    uuid "^10.0.0"

-"@langchain/langgraph-sdk@~1.8.9":
-  version "1.8.10"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.8.10.tgz#bd175cda1ab629845ef28b22b45f3bdd1f65b029"
-  integrity sha512-wrB3rkRw5KAmsqezwvKP3midT4qJrV6Hj9XJMYo+cbvXC4HYpSAmyY/VriSyeTFRbLG/OP/pY2Yz+9Z54nSaXQ==
+"@langchain/langgraph-sdk@~1.8.1":
+  version "1.8.3"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph-sdk/-/langgraph-sdk-1.8.3.tgz#deedc9bddd863693c6ab5f3a74058548b040377d"
+  integrity sha512-Py0S5yVtlOHz410aEsSGLRKjtsK2giDvfPS1JjAjTdcs71khuJufFtUZFwmwdJCbsG4DaGurRLHOAJu9jO4a0g==
  dependencies:
    "@types/json-schema" "^7.0.15"
    p-queue "^9.0.1"
    p-retry "^7.1.1"
    uuid "^13.0.0"

-"@langchain/langgraph@^1.2.9":
-  version "1.2.9"
-  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.2.9.tgz#4f0ba159062c3649c83cf5f621ef926b96933e32"
-  integrity sha512-3c7BtGycHC2v9p6w/Hv8L7kEl1YnZYOQTDJtmAp3knk6JOedO7d2bYP3y0SRyhv5orUEGf/KGvx8ZsB/ideP7g==
+"@langchain/langgraph@^1.2.6":
+  version "1.2.6"
+  resolved "https://registry.yarnpkg.com/@langchain/langgraph/-/langgraph-1.2.6.tgz#e6a578f96fbbc1c54ba78e0298884671dad5d195"
+  integrity sha512-5cX402dNGN6w9+0mlMU2dgUiKx6Y1tlENp7x05e9ByDbQCHSDc0kyqRWNFLGc7vatQ92S4ylxQrcCJvi8Fr4SQ==
  dependencies:
    "@langchain/langgraph-checkpoint" "^1.0.1"
-    "@langchain/langgraph-sdk" "~1.8.9"
+    "@langchain/langgraph-sdk" "~1.8.1"
    "@standard-schema/spec" "1.1.0"
    uuid "^10.0.0"

@@ -166,35 +167,35 @@
  resolved "https://registry.yarnpkg.com/@tsconfig/recommended/-/recommended-1.0.13.tgz#269fce3ad04ca70b93269ff44cca81b950f542da"
  integrity sha512-sySRuBfMKyKO/j2ZAhR8kSembhjuPEV4Ra3AHtmWLq51+iGaudr45crPSzNC5b7/Ctrh9dfUpBuTlYrH6rM58Q==

-"@turbo/darwin-64@2.9.7":
-  version "2.9.7"
-  resolved "https://registry.yarnpkg.com/@turbo/darwin-64/-/darwin-64-2.9.7.tgz#46fddae01ea7817192dc6ff36a678cc3879b753b"
-  integrity sha512-wnvOWuVWJ5EUHNKxExEWiGlTeVpLG1L0PCu5MUozyC1P2SHGiWsmpW6/yAuShH91Fa2TAHOvdCRBzriZh4j4Eg==
+"@turbo/darwin-64@2.9.3":
+  version "2.9.3"
+  resolved "https://registry.yarnpkg.com/@turbo/darwin-64/-/darwin-64-2.9.3.tgz#5d782d341ddebc20822d09ba1393238d4467ae7b"
+  integrity sha512-P8foouaP+y/p+hhEGBoZpzMbpVvUMwPjDpcy6wN7EYfvvyISD1USuV27qWkczecihwuPJzQ1lDBuL8ERcavTyg==

-"@turbo/darwin-arm64@2.9.7":
-  version "2.9.7"
-  resolved "https://registry.yarnpkg.com/@turbo/darwin-arm64/-/darwin-arm64-2.9.7.tgz#cd7cf3a024509af0f59ae3885216d62fd090fdb6"
-  integrity sha512-mA0FIPMwwN3lodDkQYaGxj6PeT7ZaN5aCEbkKn/WB+ZB9yJdVWA4J83GH7t43jqDc5dcnVluVN5UFx3plRiXhA==
+"@turbo/darwin-arm64@2.9.3":
+  version "2.9.3"
+  resolved "https://registry.yarnpkg.com/@turbo/darwin-arm64/-/darwin-arm64-2.9.3.tgz#75cd662d9c2a572532ce82d7cae1a30e2497d693"
+  integrity sha512-SIzEkvtNdzdI50FJDaIQ6kQGqgSSdFPcdn0wqmmONN6iGKjy6hsT+EH99GP65FsfV7DLZTh2NmtTIRl2kdoz5Q==

-"@turbo/linux-64@2.9.7":
-  version "2.9.7"
-  resolved "https://registry.yarnpkg.com/@turbo/linux-64/-/linux-64-2.9.7.tgz#25ee9a2cb3042498a3203e14653b14041105020f"
-  integrity sha512-fEbUYpgb5l7P+q+5tsWF2gw+/GSjUsuUTcnfm+f0lozUjgcjLKyOat6PgtAChmIFcTPchCL/8rJ3TvkBy01gfA==
+"@turbo/linux-64@2.9.3":
+  version "2.9.3"
+  resolved "https://registry.yarnpkg.com/@turbo/linux-64/-/linux-64-2.9.3.tgz#de693a996071654a0bea51c7ed9dc6fdc3950ae8"
+  integrity sha512-pLRwFmcHHNBvsCySLS6OFabr/07kDT2pxEt/k6eBf/3asiVQZKJ7Rk88AafQx2aYA641qek4RsXvYO3JYpiBug==

-"@turbo/linux-arm64@2.9.7":
-  version "2.9.7"
-  resolved "https://registry.yarnpkg.com/@turbo/linux-arm64/-/linux-arm64-2.9.7.tgz#5b19d6249a50cb8153b8f2bc22ad10bbda614fbe"
-  integrity sha512-VkUjulo9ytfHKUHOS5gy0XPoh4CTKPXWCL8nLdrlHVi9fSut31ECeUqnm/dAbETP5D4xo9mH9XkJ+qMzGe/zmg==
+"@turbo/linux-arm64@2.9.3":
+  version "2.9.3"
+  resolved "https://registry.yarnpkg.com/@turbo/linux-arm64/-/linux-arm64-2.9.3.tgz#88fc6fe572d83c5488eeae9b564b57c335f4d856"
+  integrity sha512-gy6ApUroC2Nzv+qjGtE/uPNkhHAFU4c8God+zd5Aiv9L9uBgHlxVJpHT3XWl5xwlJZ2KWuMrlHTaS5kmNB+q1Q==

-"@turbo/windows-64@2.9.7":
-  version "2.9.7"
-  resolved "https://registry.yarnpkg.com/@turbo/windows-64/-/windows-64-2.9.7.tgz#900645776fa44ff8333e801d890992736f6dbc72"
-  integrity sha512-/GWdY6/x4aIHqkYJq596Rpdk1x0MkpRPkJcLAoB3yGRwyUms0+u2F1GnV54IbyAZTeKLRWSJKzNC+QwVGdYchA==
+"@turbo/windows-64@2.9.3":
+  version "2.9.3"
+  resolved "https://registry.yarnpkg.com/@turbo/windows-64/-/windows-64-2.9.3.tgz#a7812e4f33972f74daed93b2ac8845f88a68c775"
+  integrity sha512-d0YelTX6hAsB7kIEtGB3PzIzSfAg3yDoUlHwuwJc3adBXUsyUIs0YLG+1NNtuhcDOUGnWQeKUoJ2pGWvbpRj7w==

-"@turbo/windows-arm64@2.9.7":
-  version "2.9.7"
-  resolved "https://registry.yarnpkg.com/@turbo/windows-arm64/-/windows-arm64-2.9.7.tgz#e678d73fdbcbb12a679403fe7ba070fb67f37810"
-  integrity sha512-xBBgxCC5PK2+WZ1PPRZdp+aJ0bMBcEbweXWux3RUHJvX9ZodcoQySkrW6qt+ahb+uk8ZjyQodLfDwtVSoYds1w==
+"@turbo/windows-arm64@2.9.3":
+  version "2.9.3"
+  resolved "https://registry.yarnpkg.com/@turbo/windows-arm64/-/windows-arm64-2.9.3.tgz#1891a89fe87d501e63a7a4367082f3afec18fa6f"
+  integrity sha512-/08CwpKJl3oRY8nOlh2YgilZVJDHsr60XTNxRhuDeuFXONpUZ5X+Nv65izbG/xBew9qxcJFbDX9/sAmAX+ITcQ==

 "@types/esrecurse@^4.3.1":
  version "4.3.1"
@@ -216,100 +217,105 @@
  resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
  integrity sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==

-"@typescript-eslint/eslint-plugin@^8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.59.1.tgz#781bc6f9002982cfaf75a185240e24ad7276628a"
-  integrity sha512-BOziFIfE+6osHO9FoJG4zjoHUcvI7fTNBSpdAwrNH0/TLvzjsk2oo8XSSOT2HhqUyhZPfHv4UOffoJ9oEEQ7Ag==
+"@types/uuid@^10.0.0":
+  version "10.0.0"
+  resolved "https://registry.yarnpkg.com/@types/uuid/-/uuid-10.0.0.tgz#e9c07fe50da0f53dc24970cca94d619ff03f6f6d"
+  integrity sha512-7gqG38EyHgyP1S+7+xomFtL+ZNHcKv6DwNaCZmJmo1vgMugyF3TCnXVg4t1uk89mLNwnLtnY3TpOpCOyp1/xHQ==
+
+"@typescript-eslint/eslint-plugin@^8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.58.0.tgz#ad40e492f1931f46da1bd888e52b9e56df9063aa"
+  integrity sha512-RLkVSiNuUP1C2ROIWfqX+YcUfLaSnxGE/8M+Y57lopVwg9VTYYfhuz15Yf1IzCKgZj6/rIbYTmJCUSqr76r0Wg==
  dependencies:
    "@eslint-community/regexpp" "^4.12.2"
-    "@typescript-eslint/scope-manager" "8.59.1"
-    "@typescript-eslint/type-utils" "8.59.1"
-    "@typescript-eslint/utils" "8.59.1"
-    "@typescript-eslint/visitor-keys" "8.59.1"
+    "@typescript-eslint/scope-manager" "8.58.0"
+    "@typescript-eslint/type-utils" "8.58.0"
+    "@typescript-eslint/utils" "8.58.0"
+    "@typescript-eslint/visitor-keys" "8.58.0"
    ignore "^7.0.5"
    natural-compare "^1.4.0"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/parser@^8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.59.1.tgz#835d20a62350659a082a1ae2a60b822c40488905"
-  integrity sha512-HDQH9O/47Dxi1ceDhBXdaldtf/WV9yRYMjbjCuNk3qnaTD564qwv61Y7+gTxwxRKzSrgO5uhtw584igXVuuZkA==
+"@typescript-eslint/parser@^8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-8.58.0.tgz#da04ece1967b6c2fe8f10c3473dabf3825795ef7"
+  integrity sha512-rLoGZIf9afaRBYsPUMtvkDWykwXwUPL60HebR4JgTI8mxfFe2cQTu3AGitANp4b9B2QlVru6WzjgB2IzJKiCSA==
  dependencies:
-    "@typescript-eslint/scope-manager" "8.59.1"
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/typescript-estree" "8.59.1"
-    "@typescript-eslint/visitor-keys" "8.59.1"
+    "@typescript-eslint/scope-manager" "8.58.0"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/typescript-estree" "8.58.0"
+    "@typescript-eslint/visitor-keys" "8.58.0"
    debug "^4.4.3"

-"@typescript-eslint/project-service@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.59.1.tgz#49efe87c37ef84262f23df8bf62fdc56698ca6fe"
-  integrity sha512-+MuHQlHiEr00Of/IQbE/MmEoi44znZHbR/Pz7Opq4HryUOlRi+/44dro9Ycy8Fyo+/024IWtw8m4JUMCGTYxDg==
+"@typescript-eslint/project-service@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/project-service/-/project-service-8.58.0.tgz#66ceda0aabf7427aec3e2713fa43eb278dead2aa"
+  integrity sha512-8Q/wBPWLQP1j16NxoPNIKpDZFMaxl7yWIoqXWYeWO+Bbd2mjgvoF0dxP2jKZg5+x49rgKdf7Ck473M8PC3V9lg==
  dependencies:
-    "@typescript-eslint/tsconfig-utils" "^8.59.1"
-    "@typescript-eslint/types" "^8.59.1"
+    "@typescript-eslint/tsconfig-utils" "^8.58.0"
+    "@typescript-eslint/types" "^8.58.0"
    debug "^4.4.3"

-"@typescript-eslint/scope-manager@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.59.1.tgz#ed90d054fc3db2d0c81464db3a953a94fb85bb58"
-  integrity sha512-LwuHQI4pDOYVKvmH2dkaJo6YZCSgouVgnS/z7yBPKBMvgtBvyLqiLy9Z6b7+m/TRcX1NFYUqZetI5Y+aT4GEfg==
+"@typescript-eslint/scope-manager@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-8.58.0.tgz#e304142775e49a1b7ac3c8bf2536714447c72cab"
+  integrity sha512-W1Lur1oF50FxSnNdGp3Vs6P+yBRSmZiw4IIjEeYxd8UQJwhUF0gDgDD/W/Tgmh73mxgEU3qX0Bzdl/NGuSPEpQ==
  dependencies:
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/visitor-keys" "8.59.1"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/visitor-keys" "8.58.0"

-"@typescript-eslint/tsconfig-utils@8.59.1", "@typescript-eslint/tsconfig-utils@^8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.59.1.tgz#ba2a779a444f1d5cb92a606f9b209d239fd4cab1"
-  integrity sha512-/0nEyPbX7gRsk0Uwfe4ALwwgxuA66d/l2mhRDNlAvaj4U3juhUtJNq0DsY8M2AYwwb9rEq2hrC3IcIcEt++iJA==
+"@typescript-eslint/tsconfig-utils@8.58.0", "@typescript-eslint/tsconfig-utils@^8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.58.0.tgz#c5a8edb21f31e0fdee565724e1b984171c559482"
+  integrity sha512-doNSZEVJsWEu4htiVC+PR6NpM+pa+a4ClH9INRWOWCUzMst/VA9c4gXq92F8GUD1rwhNvRLkgjfYtFXegXQF7A==

-"@typescript-eslint/type-utils@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.59.1.tgz#9c83d3f2ed9187a815e8120f72c08317e513e409"
-  integrity sha512-klWPBR2ciQHS3f++ug/mVnWKPjBUo7icEL3FAO1lhAR1Z1i5NQYZ1EannMSRYcq5qCv5wNALlXr6fksRHyYl7w==
+"@typescript-eslint/type-utils@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/type-utils/-/type-utils-8.58.0.tgz#ce0e72cd967ffbbe8de322db6089bd4374be352f"
+  integrity sha512-aGsCQImkDIqMyx1u4PrVlbi/krmDsQUs4zAcCV6M7yPcPev+RqVlndsJy9kJ8TLihW9TZ0kbDAzctpLn5o+lOg==
  dependencies:
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/typescript-estree" "8.59.1"
-    "@typescript-eslint/utils" "8.59.1"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/typescript-estree" "8.58.0"
+    "@typescript-eslint/utils" "8.58.0"
    debug "^4.4.3"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/types@8.59.1", "@typescript-eslint/types@^8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.59.1.tgz#c1d014d3f03a97e0113a8899fc9d4e45a7fb0ca9"
-  integrity sha512-ZDCjgccSdYPw5Bxh+my4Z0lJU96ZDN7jbBzvmEn0FZx3RtU1C7VWl6NbDx94bwY3V5YsgwRzJPOgeY2Q/nLG8A==
+"@typescript-eslint/types@8.58.0", "@typescript-eslint/types@^8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-8.58.0.tgz#e94ae7abdc1c6530e71183c1007b61fa93112a5a"
+  integrity sha512-O9CjxypDT89fbHxRfETNoAnHj/i6IpRK0CvbVN3qibxlLdo5p5hcLmUuCCrHMpxiWSwKyI8mCP7qRNYuOJ0Uww==

-"@typescript-eslint/typescript-estree@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.59.1.tgz#4391fadf98a22c869c5b6522dbf4e491e53e351a"
-  integrity sha512-OUd+vJS05sSkOip+BkZ/2NS8RMxrAAJemsC6vU3kmfLyeaJT0TftHkV9mcx2107MmsBVXXexhVu4F0TZXyMl4g==
+"@typescript-eslint/typescript-estree@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-8.58.0.tgz#ed233faa8e2f2a2e1357c3e7d553d6465a0ee59a"
+  integrity sha512-7vv5UWbHqew/dvs+D3e1RvLv1v2eeZ9txRHPnEEBUgSNLx5ghdzjHa0sgLWYVKssH+lYmV0JaWdoubo0ncGYLA==
  dependencies:
-    "@typescript-eslint/project-service" "8.59.1"
-    "@typescript-eslint/tsconfig-utils" "8.59.1"
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/visitor-keys" "8.59.1"
+    "@typescript-eslint/project-service" "8.58.0"
+    "@typescript-eslint/tsconfig-utils" "8.58.0"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/visitor-keys" "8.58.0"
    debug "^4.4.3"
    minimatch "^10.2.2"
    semver "^7.7.3"
    tinyglobby "^0.2.15"
    ts-api-utils "^2.5.0"

-"@typescript-eslint/utils@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.59.1.tgz#cf6204d69701bbbc5b150f98c18aeef0a42c10bd"
-  integrity sha512-3pIeoXhCeYH9FSCBI8P3iNwJlGuzPlYKkTlen2O9T1DSeeg8UG8jstq6BLk+Mda0qup7mgk4z4XL4OzRaxZ8LA==
+"@typescript-eslint/utils@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-8.58.0.tgz#21a74a7963b0d288b719a4121c7dd555adaab3c3"
+  integrity sha512-RfeSqcFeHMHlAWzt4TBjWOAtoW9lnsAGiP3GbaX9uVgTYYrMbVnGONEfUCiSss+xMHFl+eHZiipmA8WkQ7FuNA==
  dependencies:
    "@eslint-community/eslint-utils" "^4.9.1"
-    "@typescript-eslint/scope-manager" "8.59.1"
-    "@typescript-eslint/types" "8.59.1"
-    "@typescript-eslint/typescript-estree" "8.59.1"
+    "@typescript-eslint/scope-manager" "8.58.0"
+    "@typescript-eslint/types" "8.58.0"
+    "@typescript-eslint/typescript-estree" "8.58.0"

-"@typescript-eslint/visitor-keys@8.59.1":
-  version "8.59.1"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.59.1.tgz#b5cba576287a3eeb0b400b62813189abcc3f976a"
-  integrity sha512-LdDNl6C5iJExcM0Yh0PwAIBb9PrSiCsWamF/JyEZawm3kFDnRoaq3LGE4bpyRao/fWeGKKyw7icx0YxrLFC5Cg==
+"@typescript-eslint/visitor-keys@8.58.0":
+  version "8.58.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-8.58.0.tgz#2abd55a4be70fd55967aceaba4330b9ba9f45189"
+  integrity sha512-XJ9UD9+bbDo4a4epraTwG3TsNPeiB9aShrUneAVXy8q4LuwowN+qu89/6ByLMINqvIMeI9H9hOHQtg/ijrYXzQ==
  dependencies:
-    "@typescript-eslint/types" "8.59.1"
+    "@typescript-eslint/types" "8.58.0"
    eslint-visitor-keys "^5.0.0"

 acorn-jsx@^5.3.2:
@@ -337,6 +343,13 @@ ajv@^6.14.0:
    json-schema-traverse "^0.4.1"
    uri-js "^4.2.2"

+ansi-styles@^4.1.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-4.3.0.tgz#edd803628ae71c04c85ae7a0906edad34b648937"
+  integrity sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==
+  dependencies:
+    color-convert "^2.0.1"
+
 ansi-styles@^5.0.0:
  version "5.2.0"
  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-5.2.0.tgz#07449690ad45777d1924ac2abb2fc8895dba836b"
@@ -495,11 +508,38 @@ camelcase@6:
  resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-6.3.0.tgz#5685b95eb209ac9c0c177467778c9c84df58ba9a"
  integrity sha512-Gmy6FhYlCY7uOElZUSbxo2UCDH8owEk996gkbrpsgGtrJLM3J7jGxl9Ic7Qwwj4ivOE5AWZWRMecDdF7hqGjFA==

+chalk@^4.1.2:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-4.1.2.tgz#aac4e2b7734a740867aeb16bf02aad556a1e7a01"
+  integrity sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==
+  dependencies:
+    ansi-styles "^4.1.0"
+    supports-color "^7.1.0"
+
+color-convert@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-2.0.1.tgz#72d3a68d598c9bdb3af2ad1e84f21d896abd4de3"
+  integrity sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==
+  dependencies:
+    color-name "~1.1.4"
+
+color-name@~1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
+  integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
+
 concat-map@0.0.1:
  version "0.0.1"
  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
  integrity sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==

+console-table-printer@^2.12.1:
+  version "2.14.6"
+  resolved "https://registry.yarnpkg.com/console-table-printer/-/console-table-printer-2.14.6.tgz#edfe0bf311fa2701922ed509443145ab51e06436"
+  integrity sha512-MCBl5HNVaFuuHW6FGbL/4fB7N/ormCy+tQ+sxTrF6QtSbSNETvPuOVbkJBhzDgYhvjWGrTma4eYJa37ZuoQsPw==
+  dependencies:
+    simple-wcswidth "^1.0.1"
+
 cross-spawn@^7.0.6:
  version "7.0.6"
  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-7.0.6.tgz#8a58fe78f00dcd70c370451759dfbfaf03e8ee9f"
@@ -786,17 +826,17 @@ eslint-visitor-keys@^5.0.0, eslint-visitor-keys@^5.0.1:
  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz#9e3c9489697824d2d4ce3a8ad12628f91e9f59be"
  integrity sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==

-eslint@^10.2.1:
-  version "10.2.1"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.2.1.tgz#224b2a6caeb34473eddcf918762363e2e063222a"
-  integrity sha512-wiyGaKsDgqXvF40P8mDwiUp/KQjE1FdrIEJsM8PZ3XCiniTMXS3OHWWUe5FI5agoCnr8x4xPrTDZuxsBlNHl+Q==
+eslint@^10.1.0:
+  version "10.1.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-10.1.0.tgz#9ca98e654e642ab2e1af6d1e9d8613857ac341b4"
+  integrity sha512-S9jlY/ELKEUwwQnqWDO+f+m6sercqOPSqXM5Go94l7DOmxHVDgmSFGWEzeE/gwgTAr0W103BWt0QLe/7mabIvA==
  dependencies:
    "@eslint-community/eslint-utils" "^4.8.0"
    "@eslint-community/regexpp" "^4.12.2"
-    "@eslint/config-array" "^0.23.5"
-    "@eslint/config-helpers" "^0.5.5"
-    "@eslint/core" "^1.2.1"
-    "@eslint/plugin-kit" "^0.7.1"
+    "@eslint/config-array" "^0.23.3"
+    "@eslint/config-helpers" "^0.5.3"
+    "@eslint/core" "^1.1.1"
+    "@eslint/plugin-kit" "^0.6.1"
    "@humanfs/node" "^0.16.6"
    "@humanwhocodes/module-importer" "^1.0.1"
    "@humanwhocodes/retry" "^0.4.2"
@@ -1019,6 +1059,11 @@ has-bigints@^1.0.2:
  resolved "https://registry.yarnpkg.com/has-bigints/-/has-bigints-1.1.0.tgz#28607e965ac967e03cd2a2c70a2636a1edad49fe"
  integrity sha512-R3pbpkcIqv2Pm3dUwgjclDRVmWpTJW2DcMzcIhEXEx1oh/CEMObMm3KLmRJOdvhM7o4uQBnwr8pzRK2sJWIqfg==

+has-flag@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-4.0.0.tgz#944771fd9c81c81265c4d6941860da06bb59479b"
+  integrity sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==
+
 has-property-descriptors@^1.0.0, has-property-descriptors@^1.0.2:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/has-property-descriptors/-/has-property-descriptors-1.0.2.tgz#963ed7d071dc7bf5f084c5bfbe0d1b6222586854"
@@ -1327,12 +1372,16 @@ keyv@^4.5.4:
    json-buffer "3.0.1"

 "langsmith@>=0.5.0 <1.0.0":
-  version "0.5.20"
-  resolved "https://registry.yarnpkg.com/langsmith/-/langsmith-0.5.20.tgz#4021847d2ccd5a86c5eb96060f9bb5f19f80eca5"
-  integrity sha512-ULhLM8RswvQDXufLtNtvclHrWCBx8Cb5UPI6lAZC+8Dq59iHsVPz/3Ac9khWNm1VIvChRsuykixD/WrmzuuA3Q==
+  version "0.5.4"
+  resolved "https://registry.yarnpkg.com/langsmith/-/langsmith-0.5.4.tgz#f75b82b08e30db72a7d1d595b341e9666bd525e5"
+  integrity sha512-qYkNIoKpf0ZYt+cYzrDV+XI3FCexApmZmp8EMs3eDTMv0OvrHMLoxJ9IpkeoXJSX24+GPk0/jXjKx2hWerpy9w==
  dependencies:
-    p-queue "6.6.2"
-    uuid "10.0.0"
+    "@types/uuid" "^10.0.0"
+    chalk "^4.1.2"
+    console-table-printer "^2.12.1"
+    p-queue "^6.6.2"
+    semver "^7.6.3"
+    uuid "^10.0.0"

 levn@^0.4.1:
  version "0.4.1"
@@ -1479,7 +1528,7 @@ p-locate@^5.0.0:
  dependencies:
    p-limit "^3.0.2"

-p-queue@6.6.2, p-queue@^6.6.2:
+p-queue@^6.6.2:
  version "6.6.2"
  resolved "https://registry.yarnpkg.com/p-queue/-/p-queue-6.6.2.tgz#2068a9dcf8e67dd0ec3e7a2bcb76810faa85e426"
  integrity sha512-RwFpb72c/BhQLEXIZ5K2e+AhgNVmIejGlTgiB9MzZ0e93GRvqZ7uSi0dvRF7/XIXDeNkra2fNHBxTyPDGySpjQ==
@@ -1558,10 +1607,10 @@ prettier-linter-helpers@^1.0.1:
  dependencies:
    fast-diff "^1.1.2"

-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==
+prettier@^3.8.1:
+  version "3.8.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.8.1.tgz#edf48977cf991558f4fcbd8a3ba6015ba2a3a173"
+  integrity sha512-UOnG6LftzbdaHZcKoPFtOcCKztrQ57WkHDeRD9t/PTQtmT0NHSeWWepj6pS0z/N7+08BHFDQVUrfmfMRcZwbMg==

 punycode@^2.1.0:
  version "2.3.1"
@@ -1641,6 +1690,11 @@ semver@^6.3.1:
  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.1.tgz#556d2ef8689146e46dcea4bfdd095f3434dffcb4"
  integrity sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==

+semver@^7.6.3:
+  version "7.7.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.7.2.tgz#67d99fdcd35cec21e6f8b87a7fd515a33f982b58"
+  integrity sha512-RF0Fw+rO5AMf9MAyaRXI4AV0Ulj5lMHqVxxdSgiVbixSCXoEmmX/jk0CuJw4+3SqroYO9VoUh+HcuJivvtJemA==
+
 semver@^7.7.3:
  version "7.7.4"
  resolved "https://registry.yarnpkg.com/semver/-/semver-7.7.4.tgz#28464e36060e991fa7a11d0279d2d3f3b57a7e8a"
@@ -1729,6 +1783,11 @@ side-channel@^1.1.0:
    side-channel-map "^1.0.1"
    side-channel-weakmap "^1.0.2"

+simple-wcswidth@^1.0.1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/simple-wcswidth/-/simple-wcswidth-1.1.2.tgz#66722f37629d5203f9b47c5477b1225b85d6525b"
+  integrity sha512-j7piyCjAeTDSjzTSQ7DokZtMNwNlEAyxqSZeCS+CXH7fJ4jx3FuJ/mTW3mE+6JLs4VJBbcll0Kjn+KXI5t21Iw==
+
 stop-iteration-iterator@^1.1.0:
  version "1.1.0"
  resolved "https://registry.yarnpkg.com/stop-iteration-iterator/-/stop-iteration-iterator-1.1.0.tgz#f481ff70a548f6124d0312c3aa14cbfa7aa542ad"
@@ -1779,6 +1838,13 @@ strip-json-comments@^3.1.1:
  resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-3.1.1.tgz#31f1281b3832630434831c310c01cccda8cbe006"
  integrity sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==

+supports-color@^7.1.0:
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-7.2.0.tgz#1b7dcdcb32b8138801b3e478ba6a51caa89648da"
+  integrity sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==
+  dependencies:
+    has-flag "^4.0.0"
+
 supports-preserve-symlinks-flag@^1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz#6eda4bd344a3c94aea376d4cc31bc77311039e09"
@@ -1814,17 +1880,17 @@ tsconfig-paths@^3.15.0:
    minimist "^1.2.6"
    strip-bom "^3.0.0"

-turbo@^2.9.7:
-  version "2.9.7"
-  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.9.7.tgz#da6d5a821f0bde5174e1a55af6690dad5c2fb004"
-  integrity sha512-epxzqVO2s0IxcSWcgb+qKrtco8isfe7g3VtiS6hkYnEK4A9XQDZbrtavQ6MtWR1KoQn+1fUomaQth2rfRHlUlg==
+turbo@^2.9.3:
+  version "2.9.3"
+  resolved "https://registry.yarnpkg.com/turbo/-/turbo-2.9.3.tgz#4f0adf2c8677edd7b46d400629c99e9e26e58e44"
+  integrity sha512-J/VUvsGRykPb9R8Kh8dHVBOqioDexLk9BhLCU/ZybRR+HN9UR3cURdazFvNgMDt9zPP8TF6K73Z+tplfmi0PqQ==
  optionalDependencies:
-    "@turbo/darwin-64" "2.9.7"
-    "@turbo/darwin-arm64" "2.9.7"
-    "@turbo/linux-64" "2.9.7"
-    "@turbo/linux-arm64" "2.9.7"
-    "@turbo/windows-64" "2.9.7"
-    "@turbo/windows-arm64" "2.9.7"
+    "@turbo/darwin-64" "2.9.3"
+    "@turbo/darwin-arm64" "2.9.3"
+    "@turbo/linux-64" "2.9.3"
+    "@turbo/linux-arm64" "2.9.3"
+    "@turbo/windows-64" "2.9.3"
+    "@turbo/windows-arm64" "2.9.3"

 type-check@^0.4.0, type-check@~0.4.0:
  version "0.4.0"
@@ -1900,11 +1966,16 @@ uri-js@^4.2.2:
  dependencies:
    punycode "^2.1.0"

-uuid@10.0.0, uuid@^10.0.0:
+uuid@^10.0.0:
  version "10.0.0"
  resolved "https://registry.yarnpkg.com/uuid/-/uuid-10.0.0.tgz#5a95aa454e6e002725c79055fd42aaba30ca6294"
  integrity sha512-8XkAphELsDnEGrDxUOHB3RGvXz6TeuYSGEZBOjtTtPm2lwhGBjLgOzLHB63IUWfBpNucQjND6d3AOudO+H3RWQ==

+uuid@^11.1.0:
+  version "11.1.0"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-11.1.0.tgz#9549028be1753bb934fc96e2bca09bb4105ae912"
+  integrity sha512-0/A9rDy9P7cJ+8w1c9WD9V//9Wj15Ce2MPz8Ri6032usz+NfePxx5AcN3bN+r6ZL6jEo066/yNYB3tn4pQEx+A==
+
 uuid@^13.0.0:
  version "13.0.0"
  resolved "https://registry.yarnpkg.com/uuid/-/uuid-13.0.0.tgz#263dc341b19b4d755eb8fe36b78d95a6b65707e8"
@@ -1 +1 @@
-__version__ = "0.4.24"
+__version__ = "0.4.21"
@@ -1,4 +1,4 @@
-from .cli import cli
+from .entrypoint import main

 if __name__ == "__main__":
-    cli()
+    main()
@@ -1,124 +0,0 @@
-"""Shared ignore-file handling for local source filtering."""
-
-import pathlib
-from dataclasses import dataclass
-
-import pathspec
-
-_ALWAYS_EXCLUDE = [
-    "__pycache__/",
-    ".git/",
-    ".venv/",
-    "venv/",
-    "node_modules/",
-    ".tox/",
-    ".mypy_cache/",
-]
-_ALWAYS_EXCLUDE_NAMES = frozenset(
-    pattern.rstrip("/").split("/")[-1] for pattern in _ALWAYS_EXCLUDE
-)
-_GLOB_CHARS = frozenset("*?[")
-
-
-@dataclass(frozen=True, slots=True)
-class _NegatedDockerignoreHints:
-    exact_dirs: frozenset[pathlib.PurePosixPath] = frozenset()
-    wildcard_prefixes: frozenset[pathlib.PurePosixPath] = frozenset()
-    recurse_all: bool = False
-
-    def requires_dir_walk(self, path: pathlib.PurePosixPath) -> bool:
-        if self.recurse_all or path in self.exact_dirs:
-            return True
-        return any(
-            path == prefix or path in prefix.parents or prefix in path.parents
-            for prefix in self.wildcard_prefixes
-        )
-
-
-def _build_ignore_spec(
-    directory: pathlib.Path, *, include_gitignore: bool = True
-) -> pathspec.PathSpec:
-    """Build a PathSpec combining built-in exclusions with ignore files.
-
-    Always excludes common non-source directories (`_ALWAYS_EXCLUDE`). On top
-    of that, patterns from `.dockerignore` are merged in. `.gitignore` patterns
-    are optional because some callers need Docker build-context semantics,
-    while archive creation wants both files.
-    """
-    lines: list[str] = list(_ALWAYS_EXCLUDE)
-    ignore_files = [".dockerignore"]
-    if include_gitignore:
-        ignore_files.append(".gitignore")
-    for name in ignore_files:
-        ignore_file = directory / name
-        if ignore_file.is_file():
-            lines.extend(ignore_file.read_text(encoding="utf-8").splitlines())
-    return pathspec.PathSpec.from_lines("gitwildmatch", lines)
-
-
-def _is_always_excluded(path: pathlib.PurePosixPath, *, is_dir: bool) -> bool:
-    """Whether `path` lives inside a built-in excluded directory."""
-    parent_parts = path.parts if is_dir else path.parts[:-1]
-    return any(part in _ALWAYS_EXCLUDE_NAMES for part in parent_parts)
-
-
-def _build_dockerignore_negation_hints(
-    directory: pathlib.Path,
-) -> _NegatedDockerignoreHints:
-    """Summarize which ignored directories must still be traversed.
-
-    Most negations only require walking a small, concrete chain of parent
-    directories (for example `!assets/keep.txt` requires entering `assets/`).
-    Broader glob negations may force a wider walk.
-    """
-    ignore_file = directory / ".dockerignore"
-    if not ignore_file.is_file():
-        return _NegatedDockerignoreHints()
-
-    exact_dirs: set[pathlib.PurePosixPath] = set()
-    wildcard_prefixes: set[pathlib.PurePosixPath] = set()
-    recurse_all = False
-
-    for raw_line in ignore_file.read_text(encoding="utf-8").splitlines():
-        line = raw_line.strip()
-        if not line or line.startswith("#") or line.startswith("\\!"):
-            continue
-        if line.startswith("\\#"):
-            line = line[1:]
-        if not line.startswith("!"):
-            continue
-
-        pattern = line[1:].lstrip("/")
-        while pattern.startswith("./"):
-            pattern = pattern[2:]
-        pattern = pattern.rstrip("/")
-        parts = [part for part in pattern.split("/") if part and part != "."]
-        if not parts:
-            recurse_all = True
-            continue
-
-        wildcard_index = next(
-            (
-                idx
-                for idx, part in enumerate(parts)
-                if any(char in part for char in _GLOB_CHARS)
-            ),
-            None,
-        )
-        if wildcard_index is not None:
-            literal_parts = parts[:wildcard_index]
-            if not literal_parts:
-                recurse_all = True
-                continue
-            wildcard_prefixes.add(pathlib.PurePosixPath(*literal_parts))
-            continue
-
-        parent_parts = parts[:-1]
-        for idx in range(1, len(parent_parts) + 1):
-            exact_dirs.add(pathlib.PurePosixPath(*parent_parts[:idx]))
-
-    return _NegatedDockerignoreHints(
-        exact_dirs=frozenset(exact_dirs),
-        wildcard_prefixes=frozenset(wildcard_prefixes),
-        recurse_all=recurse_all,
-    )
@@ -26,15 +26,8 @@ class LogData(TypedDict):
    params: dict[str, Any]


-def get_anonymized_params(
-    kwargs: dict[str, Any], *, cli_command: str
-) -> dict[str, bool | str]:
-    params: dict[str, bool | str] = {}
-
-    if cli_command == "deploy" and (
-        analytics_source := os.getenv("LANGGRAPH_CLI_ANALYTICS_SOURCE")
-    ):
-        params["source"] = analytics_source
+def get_anonymized_params(kwargs: dict[str, Any]) -> dict[str, bool]:
+    params = {}

    # anonymize params with values
    if config := kwargs.get("config"):
@@ -95,7 +88,7 @@ def log_command(func):
            "python_version": platform.python_version(),
            "cli_version": __version__,
            "cli_command": func.__name__,
-            "params": get_anonymized_params(kwargs, cli_command=func.__name__),
+            "params": get_anonymized_params(kwargs),
        }

        background_thread = threading.Thread(target=log_data, args=(data,))
@@ -9,12 +9,35 @@ from contextlib import contextmanager
 import click
 import pathspec

-from langgraph_cli._ignore import _build_ignore_spec
 from langgraph_cli.config import Config, _assemble_local_deps

 _WARN_SIZE = 50 * 1024 * 1024  # 50 MB
 _MAX_SIZE = 200 * 1024 * 1024  # 200 MB

+_ALWAYS_EXCLUDE = [
+    "__pycache__/",
+    ".git/",
+    ".venv/",
+    "venv/",
+    "node_modules/",
+    ".tox/",
+    ".mypy_cache/",
+]
+
+
+def _build_ignore_spec(directory: pathlib.Path) -> pathspec.PathSpec:
+    """Build a PathSpec combining built-in exclusions with .dockerignore and .gitignore.
+
+    Always excludes common non-source directories (_ALWAYS_EXCLUDE).  On top of
+    that, patterns from .dockerignore and .gitignore (if present) are merged in.
+    """
+    lines: list[str] = list(_ALWAYS_EXCLUDE)
+    for name in (".dockerignore", ".gitignore"):
+        ignore_file = directory / name
+        if ignore_file.is_file():
+            lines.extend(ignore_file.read_text(encoding="utf-8").splitlines())
+    return pathspec.PathSpec.from_lines("gitwildmatch", lines)
+

 def _tar_filter(tarinfo: tarfile.TarInfo) -> tarfile.TarInfo | None:
    """Strip symlinks, hardlinks, and traversal paths from archive."""
@@ -0,0 +1,74 @@
+"""User-facing entrypoint for the LangGraph CLI."""
+
+from __future__ import annotations
+
+import os
+import pathlib
+import sys
+from collections.abc import Sequence
+
+import click
+
+from .cli import cli
+
+_GO_CLI_FLAG = "LANGGRAPH_USE_GO_CLI"
+_GO_CLI_PATH_ENV = "LANGGRAPH_GO_CLI_PATH"
+_CALLING_PYTHON_ENV = "LANGGRAPH_CALLING_PYTHON"
+
+_TRUE_VALUES = frozenset({"1", "true", "yes", "on"})
+
+
+def _legacy_cli(argv: Sequence[str] | None = None) -> None:
+    cli.main(args=list(argv) if argv is not None else None, prog_name="langgraph")
+
+
+def _should_use_go_cli() -> bool:
+    value = os.environ.get(_GO_CLI_FLAG, "")
+    return value.strip().lower() in _TRUE_VALUES
+
+
+def _bundled_go_cli_path() -> pathlib.Path:
+    binary_name = "langgraph.exe" if os.name == "nt" else "langgraph"
+    return pathlib.Path(__file__).resolve().parent / "bin" / binary_name
+
+
+def _resolve_go_cli_path() -> pathlib.Path | None:
+    override = os.environ.get(_GO_CLI_PATH_ENV)
+    if override:
+        path = pathlib.Path(override).expanduser()
+        return path.resolve()
+
+    bundled = _bundled_go_cli_path()
+    if bundled.is_file():
+        return bundled
+
+    return None
+
+
+def _exec_go_cli(argv: Sequence[str]) -> None:
+    path = _resolve_go_cli_path()
+    if path is None:
+        raise click.ClickException(
+            "Go CLI requested via LANGGRAPH_USE_GO_CLI, but no langgraph binary was "
+            "found. Set LANGGRAPH_GO_CLI_PATH or install a wheel that bundles the "
+            "binary."
+        )
+    if not path.is_file():
+        raise click.ClickException(
+            f"LANGGRAPH_GO_CLI_PATH points to a missing file: {path}"
+        )
+
+    env = os.environ.copy()
+    env.setdefault(_CALLING_PYTHON_ENV, sys.executable)
+    os.execvpe(str(path), [str(path), *argv], env)
+
+
+def main(argv: Sequence[str] | None = None) -> None:
+    args = list(sys.argv[1:] if argv is None else argv)
+    try:
+        if _should_use_go_cli():
+            _exec_go_cli(args)
+        _legacy_cli(args)
+    except click.ClickException as exc:
+        exc.show()
+        raise SystemExit(exc.exit_code) from exc
@@ -10,13 +10,7 @@ except ModuleNotFoundError:  # pragma: no cover - exercised on Python 3.10.
    import tomli as tomllib

 import click
-import pathspec

-from langgraph_cli._ignore import (
-    _build_dockerignore_negation_hints,
-    _build_ignore_spec,
-    _is_always_excluded,
-)
 from langgraph_cli.schemas import Config


@@ -446,32 +440,16 @@ def _container_root_for_uv_lock_package(


 def _uv_lock_package_copy_items(
-    package: UvLockPackage,
-    plan: UvLockPlan,
-    ignore_spec: pathspec.PathSpec,
+    package: UvLockPackage, plan: UvLockPlan
 ) -> tuple[tuple[pathlib.PurePosixPath, pathlib.PurePosixPath], ...]:
-    # Skip entries that .dockerignore / built-in exclusions would strip from
-    # the build context. Emitting `ADD <path>` for a file that Docker has
-    # filtered out causes the build to fail with
-    # "failed to compute cache key: <path> not found".
    if package.root != plan.project_root:
        relative_root = pathlib.PurePosixPath(
            *package.root.relative_to(plan.project_root).parts
        )
-        if _is_always_excluded(relative_root, is_dir=True) or ignore_spec.match_file(
-            f"{relative_root.as_posix()}/"
-        ):
-            raise click.UsageError(
-                f"Workspace member '{package.name}' at {relative_root} is "
-                "excluded from the Docker build context, but uv.lock requires "
-                "it to be copied into the build context. Remove the matching "
-                "pattern or drop the member from [tool.uv.workspace].members."
-            )
        return ((relative_root, plan.container_roots[package.root]),)

    root_container = plan.container_roots[package.root]
    workspace_member_roots = plan.all_workspace_roots - {plan.project_root}
-    negated_dockerignore_hints = _build_dockerignore_negation_hints(plan.project_root)

    def iter_entries(
        current_dir: pathlib.Path,
@@ -483,32 +461,18 @@ def _uv_lock_package_copy_items(
                # and excluded entirely otherwise.
                continue

+            descendant_member_roots = [
+                ws_root
+                for ws_root in workspace_member_roots
+                if child in ws_root.parents
+            ]
+            if child.is_dir() and descendant_member_roots:
+                entries.extend(iter_entries(child))
+                continue
+
            relative_child = pathlib.PurePosixPath(
                *child.relative_to(plan.project_root).parts
            )
-            is_dir = child.is_dir()
-            if _is_always_excluded(relative_child, is_dir=is_dir):
-                continue
-            ignored = ignore_spec.match_file(
-                f"{relative_child.as_posix()}/" if is_dir else relative_child.as_posix()
-            )
-            is_workspace_parent = is_dir and any(
-                child in ws_root.parents for ws_root in workspace_member_roots
-            )
-
-            if is_workspace_parent:
-                entries.extend(iter_entries(child))
-                continue
-            if (
-                is_dir
-                and ignored
-                and negated_dockerignore_hints.requires_dir_walk(relative_child)
-            ):
-                entries.extend(iter_entries(child))
-                continue
-            if ignored:
-                continue
-
            entries.append(
                (relative_child, root_container.joinpath(*relative_child.parts))
            )
@@ -992,13 +956,10 @@ def python_config_to_docker_uv_lock(
    docker_plan.add_raw("# -- End of uv.lock dependencies install --")
    docker_plan.add_blank()

-    ignore_spec = _build_ignore_spec(plan.project_root, include_gitignore=False)
    for package in plan.install_order:
        package_label = package.root.relative_to(plan.project_root).as_posix() or "."
        docker_plan.add_raw(f"# -- Adding workspace package {package_label} --")
-        for source, destination in _uv_lock_package_copy_items(
-            package, plan, ignore_spec
-        ):
+        for source, destination in _uv_lock_package_copy_items(package, plan):
            docker_plan.add_raw(copy_from_project_root(source, destination.as_posix()))
        docker_plan.add_instruction(
            "WORKDIR", plan.container_roots[package.root].as_posix()
@@ -23,18 +23,18 @@ dependencies = [
 path = "langgraph_cli/__init__.py"
 [project.optional-dependencies]
 inmem = [
-    "langgraph-api>=0.5.35,<0.9.0 ; python_version >= '3.11'",
+    "langgraph-api>=0.5.35,<0.8.0 ; python_version >= '3.11'",
    "langgraph-runtime-inmem>=0.7 ; python_version >= '3.11'",
 ]

 [project.urls]
 Source = "https://github.com/langchain-ai/langgraph/tree/main/libs/cli"
-Twitter = "https://x.com/langchain_oss"
+Twitter = "https://x.com/LangChain"
 Slack = "https://www.langchain.com/join-community"
 Reddit = "https://www.reddit.com/r/LangChain/"

 [project.scripts]
-langgraph = "langgraph_cli.cli:cli"
+langgraph = "langgraph_cli.entrypoint:main"

 [dependency-groups]
 test = [
@@ -61,6 +61,9 @@ default-groups = ['dev']
 [tool.hatch.build.targets.wheel]
 include = ["langgraph_cli"]

+[tool.hatch.build.targets.wheel.hooks.custom]
+path = "hatch_build.py"
+
 [tool.pytest.ini_options]
 addopts = "--strict-markers --strict-config --durations=5 -vv"
 asyncio_mode = "auto"
@@ -99,13 +99,6 @@ class TestBuildIgnoreSpec:
        assert spec.match_file("app.log")
        assert spec.match_file("mod.pyc")

-    def test_can_skip_gitignore(self, tmp_path):
-        (tmp_path / ".dockerignore").write_text("*.log\n")
-        (tmp_path / ".gitignore").write_text("*.pyc\n")
-        spec = _build_ignore_spec(tmp_path, include_gitignore=False)
-        assert spec.match_file("app.log")
-        assert not spec.match_file("mod.pyc")
-
    def test_no_ignore_files_only_builtins(self, tmp_path):
        spec = _build_ignore_spec(tmp_path)
        assert spec.match_file("__pycache__/")
@@ -4,7 +4,6 @@ import os
 import pathlib
 import tempfile
 import textwrap
-from unittest.mock import patch

 import click
 import pytest
@@ -1856,364 +1855,6 @@ def test_config_to_docker_uv_lock_supports_single_uv_project_root():
        assert additional_contexts == {}


-def test_config_to_docker_uv_lock_skips_dockerignore_entries():
-    """Entries filtered by .dockerignore / built-in excludes must not appear
-    as ADD lines. Docker fails to compute the cache key for paths that the
-    build context has stripped."""
-    with tempfile.TemporaryDirectory() as tmpdir:
-        tmpdir_path = pathlib.Path(tmpdir)
-        project_root = tmpdir_path / "single"
-        project_root.mkdir()
-        (project_root / "uv.lock").write_text("# uv lock file\n")
-        (project_root / "pyproject.toml").write_text(
-            textwrap.dedent(
-                """
-                [project]
-                name = "single-app"
-                version = "0.1.0"
-                dependencies = ["httpx>=0.28"]
-
-                [build-system]
-                requires = ["setuptools>=61"]
-                build-backend = "setuptools.build_meta"
-                """
-            ).strip()
-            + "\n"
-        )
-        (project_root / "langgraph.json").write_text("{}\n")
-        (project_root / "src").mkdir()
-        (project_root / "src" / "agent.py").write_text("graph = object()\n")
-        (project_root / "README.md").write_text("# hi\n")
-
-        # Built-in exclusions — must never appear as ADD lines.
-        (project_root / ".git").mkdir()
-        (project_root / ".git" / "HEAD").write_text("ref: refs/heads/main\n")
-        (project_root / ".venv").mkdir()
-        (project_root / ".venv" / "pyvenv.cfg").write_text("home = /usr\n")
-        (project_root / "__pycache__").mkdir()
-        (project_root / "__pycache__" / "x.cpython-311.pyc").write_bytes(b"\x00")
-
-        # .dockerignore excludes .gitignore and a custom path.
-        (project_root / ".dockerignore").write_text(".gitignore\nsecrets.env\n")
-        (project_root / ".gitignore").write_text("*.pyc\n")
-        (project_root / "secrets.env").write_text("TOKEN=abc\n")
-
-        config = validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {"agent": "./src/agent.py:graph"},
-                "source": {"kind": "uv"},
-            }
-        )
-        docker, _ = config_to_docker(
-            project_root / "langgraph.json",
-            config,
-            base_image="langchain/langgraph-api:0.2.47",
-        )
-
-        for excluded in (
-            "ADD .git ",
-            "ADD .gitignore ",
-            "ADD .venv ",
-            "ADD __pycache__ ",
-            "ADD secrets.env ",
-        ):
-            assert excluded not in docker, (
-                f"{excluded!r} should be filtered out of Dockerfile:\n{docker}"
-            )
-
-        # The .dockerignore itself is still part of the context and should be
-        # ADDed (Docker needs it at build time, and archive.py includes it).
-        assert "ADD .dockerignore /deps/workspace/.dockerignore" in docker
-        assert "ADD src /deps/workspace/src" in docker
-        assert "ADD README.md /deps/workspace/README.md" in docker
-
-
-def test_config_to_docker_uv_lock_does_not_apply_gitignore():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        tmpdir_path = pathlib.Path(tmpdir)
-        project_root = tmpdir_path / "single"
-        project_root.mkdir()
-        (project_root / "uv.lock").write_text("# uv lock file\n")
-        (project_root / "pyproject.toml").write_text(
-            textwrap.dedent(
-                """
-                [project]
-                name = "single-app"
-                version = "0.1.0"
-                dependencies = ["httpx>=0.28"]
-
-                [build-system]
-                requires = ["setuptools>=61"]
-                build-backend = "setuptools.build_meta"
-                """
-            ).strip()
-            + "\n"
-        )
-        (project_root / "langgraph.json").write_text("{}\n")
-        (project_root / "src").mkdir()
-        (project_root / "src" / "agent.py").write_text("graph = object()\n")
-        (project_root / "README.md").write_text("# hi\n")
-        (project_root / ".gitignore").write_text("README.md\n")
-
-        config = validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {"agent": "./src/agent.py:graph"},
-                "source": {"kind": "uv"},
-            }
-        )
-        docker, _ = config_to_docker(
-            project_root / "langgraph.json",
-            config,
-            base_image="langchain/langgraph-api:0.2.47",
-        )
-
-        assert "ADD README.md /deps/workspace/README.md" in docker
-
-
-def test_config_to_docker_uv_lock_skips_dockerignore_entries_in_workspace():
-    """Multi-member workspace: ignore patterns must filter root-level entries
-    AND entries encountered while recursing into directories that contain
-    workspace members (the `descendant_member_roots` branch)."""
-    with tempfile.TemporaryDirectory() as tmpdir:
-        tmpdir_path = pathlib.Path(tmpdir)
-        project_root, config_path = _write_uv_lock_workspace(
-            tmpdir_path,
-            agent_dependencies=["workspace-root", "shared", "httpx>=0.28"],
-            root_sources="[tool.uv.sources]\nshared = { workspace = true }\nworkspace-root = { workspace = true }",
-            agent_sources="[tool.uv.sources]\nshared = { workspace = true }\nworkspace-root = { workspace = true }",
-        )
-        root_src = project_root / "src" / "workspace_root"
-        root_src.mkdir(parents=True)
-        (root_src / "__init__.py").write_text("__all__ = []\n")
-        (project_root / "README.md").write_text("workspace root package\n")
-
-        # A non-member sibling of the `apps/agent` member that should be
-        # filtered out via .dockerignore. This exercises the recursion into
-        # `apps/` where `apps/agent` is kept (it's a member) but its sibling is
-        # filtered.
-        (project_root / "apps" / "scratch.txt").write_text("scratch\n")
-        # A root-level path that .dockerignore excludes.
-        (project_root / "secrets.env").write_text("TOKEN=abc\n")
-        (project_root / ".dockerignore").write_text("secrets.env\napps/scratch.txt\n")
-
-        config = validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {
-                    "agent": "../../apps/agent/src/agent/graph.py:graph",
-                },
-                "source": {"kind": "uv", "root": "../..", "package": "agent"},
-            }
-        )
-        docker, _ = config_to_docker(
-            config_path, config, base_image="langchain/langgraph-api:0.2.47"
-        )
-
-        assert "COPY --from=uv-workspace-root src /deps/workspace/src" in docker
-        assert (
-            "COPY --from=uv-workspace-root README.md /deps/workspace/README.md"
-            in docker
-        )
-        assert (
-            "COPY --from=uv-workspace-root .dockerignore /deps/workspace/.dockerignore"
-            in docker
-        )
-        assert "secrets.env" not in docker
-        assert "apps/scratch.txt" not in docker
-        # Workspace members themselves are still copied via their own per-member
-        # COPY line — the sibling filter must not disturb this.
-        assert (
-            "COPY --from=uv-workspace-root apps/agent /deps/workspace/apps/agent"
-            in docker
-        )
-
-
-def test_config_to_docker_uv_lock_preserves_negated_dockerignore_descendants():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        tmpdir_path = pathlib.Path(tmpdir)
-        project_root = tmpdir_path / "single"
-        project_root.mkdir()
-        (project_root / "uv.lock").write_text("# uv lock file\n")
-        (project_root / "pyproject.toml").write_text(
-            textwrap.dedent(
-                """
-                [project]
-                name = "single-app"
-                version = "0.1.0"
-                dependencies = ["httpx>=0.28"]
-
-                [build-system]
-                requires = ["setuptools>=61"]
-                build-backend = "setuptools.build_meta"
-                """
-            ).strip()
-            + "\n"
-        )
-        (project_root / "langgraph.json").write_text("{}\n")
-        (project_root / "src").mkdir()
-        (project_root / "src" / "agent.py").write_text("graph = object()\n")
-        (project_root / "assets").mkdir()
-        (project_root / "assets" / "keep.txt").write_text("keep\n")
-        (project_root / "assets" / "drop.txt").write_text("drop\n")
-        (project_root / ".dockerignore").write_text("assets/\n!assets/keep.txt\n")
-
-        config = validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {"agent": "./src/agent.py:graph"},
-                "source": {"kind": "uv"},
-            }
-        )
-        docker, _ = config_to_docker(
-            project_root / "langgraph.json",
-            config,
-            base_image="langchain/langgraph-api:0.2.47",
-        )
-
-        assert "ADD assets /deps/workspace/assets" not in docker
-        assert "ADD assets/keep.txt /deps/workspace/assets/keep.txt" in docker
-        assert "assets/drop.txt" not in docker
-
-
-def test_config_to_docker_uv_lock_prunes_unrelated_ignored_subtrees():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        tmpdir_path = pathlib.Path(tmpdir)
-        project_root = tmpdir_path / "single"
-        project_root.mkdir()
-        (project_root / "uv.lock").write_text("# uv lock file\n")
-        (project_root / "pyproject.toml").write_text(
-            textwrap.dedent(
-                """
-                [project]
-                name = "single-app"
-                version = "0.1.0"
-                dependencies = ["httpx>=0.28"]
-
-                [build-system]
-                requires = ["setuptools>=61"]
-                build-backend = "setuptools.build_meta"
-                """
-            ).strip()
-            + "\n"
-        )
-        (project_root / "langgraph.json").write_text("{}\n")
-        (project_root / "src").mkdir()
-        (project_root / "src" / "agent.py").write_text("graph = object()\n")
-        (project_root / "assets").mkdir()
-        (project_root / "assets" / "keep.txt").write_text("keep\n")
-        (project_root / "vendor").mkdir()
-        (project_root / "vendor" / "huge.txt").write_text("large\n")
-        (project_root / ".dockerignore").write_text(
-            "vendor/\nassets/\n!assets/keep.txt\n"
-        )
-
-        config = validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {"agent": "./src/agent.py:graph"},
-                "source": {"kind": "uv"},
-            }
-        )
-
-        original_iterdir = pathlib.Path.iterdir
-
-        def guarded_iterdir(self):
-            if self == project_root / "vendor":
-                raise AssertionError("should not walk unrelated ignored subtree")
-            return original_iterdir(self)
-
-        with patch.object(
-            pathlib.Path, "iterdir", autospec=True, side_effect=guarded_iterdir
-        ):
-            docker, _ = config_to_docker(
-                project_root / "langgraph.json",
-                config,
-                base_image="langchain/langgraph-api:0.2.47",
-            )
-
-        assert "ADD assets/keep.txt /deps/workspace/assets/keep.txt" in docker
-        assert "vendor/huge.txt" not in docker
-
-
-def test_config_to_docker_uv_lock_never_reincludes_always_excluded_subtrees():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        tmpdir_path = pathlib.Path(tmpdir)
-        project_root = tmpdir_path / "single"
-        project_root.mkdir()
-        (project_root / "uv.lock").write_text("# uv lock file\n")
-        (project_root / "pyproject.toml").write_text(
-            textwrap.dedent(
-                """
-                [project]
-                name = "single-app"
-                version = "0.1.0"
-                dependencies = ["httpx>=0.28"]
-
-                [build-system]
-                requires = ["setuptools>=61"]
-                build-backend = "setuptools.build_meta"
-                """
-            ).strip()
-            + "\n"
-        )
-        (project_root / "langgraph.json").write_text("{}\n")
-        (project_root / "src").mkdir()
-        (project_root / "src" / "agent.py").write_text("graph = object()\n")
-        (project_root / ".venv" / "pkg").mkdir(parents=True)
-        (project_root / ".venv" / "pkg" / "keep.txt").write_text("keep\n")
-        (project_root / "node_modules" / "pkg").mkdir(parents=True)
-        (project_root / "node_modules" / "pkg" / "package.json").write_text("{}\n")
-        (project_root / ".dockerignore").write_text(
-            "!.venv/pkg/keep.txt\n!node_modules/pkg/package.json\n"
-        )
-
-        config = validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {"agent": "./src/agent.py:graph"},
-                "source": {"kind": "uv"},
-            }
-        )
-        docker, _ = config_to_docker(
-            project_root / "langgraph.json",
-            config,
-            base_image="langchain/langgraph-api:0.2.47",
-        )
-
-        assert ".venv/pkg/keep.txt" not in docker
-        assert "node_modules/pkg/package.json" not in docker
-        assert "ADD src /deps/workspace/src" in docker
-
-
-def test_config_to_docker_uv_lock_rejects_ignored_workspace_member():
-    """A workspace member matched by .dockerignore cannot be copied into the
-    build context — uv.lock requires it, so fail loudly with a clear message."""
-    with tempfile.TemporaryDirectory() as tmpdir:
-        tmpdir_path = pathlib.Path(tmpdir)
-        project_root, config_path = _write_uv_lock_workspace(
-            tmpdir_path,
-            agent_sources="[tool.uv.sources]\nshared = { workspace = true }",
-        )
-        (project_root / ".dockerignore").write_text("libs/shared\n")
-
-        config = validate_config(
-            {
-                "python_version": "3.11",
-                "graphs": {"agent": "../../apps/agent/src/agent/graph.py:graph"},
-                "source": {"kind": "uv", "root": "../..", "package": "agent"},
-                "auth": {"path": "../../libs/shared/src/shared/auth.py:create_auth"},
-            }
-        )
-        with pytest.raises(
-            click.UsageError, match=r"Workspace member 'shared' at libs/shared"
-        ):
-            config_to_docker(
-                config_path, config, base_image="langchain/langgraph-api:0.2.47"
-            )
-
-
 def test_config_to_docker_uv_lock_rejects_invalid_source_package_type():
    with tempfile.TemporaryDirectory() as tmpdir:
        tmpdir_path = pathlib.Path(tmpdir)
@@ -0,0 +1,116 @@
+import pathlib
+import sys
+
+import pytest
+
+from langgraph_cli import entrypoint
+
+
+def test_main_uses_legacy_cli_when_go_flag_disabled(monkeypatch):
+    captured = {}
+
+    def fake_legacy(argv):
+        captured["argv"] = list(argv)
+
+    monkeypatch.delenv("LANGGRAPH_USE_GO_CLI", raising=False)
+    monkeypatch.setattr(entrypoint, "_legacy_cli", fake_legacy)
+
+    entrypoint.main(["build", "-t", "demo"])
+
+    assert captured == {"argv": ["build", "-t", "demo"]}
+
+
+def test_main_execs_go_cli_when_flag_enabled(monkeypatch, tmp_path):
+    binary_path = tmp_path / "langgraph"
+    binary_path.write_text("")
+
+    captured = {}
+
+    def fake_execvpe(file, args, env):
+        captured["file"] = file
+        captured["args"] = args
+        captured["env"] = env.copy()
+        raise SystemExit(0)
+
+    monkeypatch.setenv("LANGGRAPH_USE_GO_CLI", "1")
+    monkeypatch.setenv("LANGGRAPH_GO_CLI_PATH", str(binary_path))
+    monkeypatch.delenv("LANGGRAPH_CALLING_PYTHON", raising=False)
+    monkeypatch.setattr(entrypoint.os, "execvpe", fake_execvpe)
+
+    with pytest.raises(SystemExit, match="0"):
+        entrypoint.main(["dev", "--port", "8000"])
+
+    assert captured["file"] == str(binary_path)
+    assert captured["args"] == [str(binary_path), "dev", "--port", "8000"]
+    assert captured["env"]["LANGGRAPH_CALLING_PYTHON"] == sys.executable
+
+
+def test_main_preserves_existing_calling_python(monkeypatch, tmp_path):
+    binary_path = tmp_path / "langgraph"
+    binary_path.write_text("")
+
+    captured = {}
+
+    def fake_execvpe(file, args, env):
+        captured["env"] = env.copy()
+        raise SystemExit(0)
+
+    monkeypatch.setenv("LANGGRAPH_USE_GO_CLI", "true")
+    monkeypatch.setenv("LANGGRAPH_GO_CLI_PATH", str(binary_path))
+    monkeypatch.setenv("LANGGRAPH_CALLING_PYTHON", "/custom/python")
+    monkeypatch.setattr(entrypoint.os, "execvpe", fake_execvpe)
+
+    with pytest.raises(SystemExit, match="0"):
+        entrypoint.main(["dev"])
+
+    assert captured["env"]["LANGGRAPH_CALLING_PYTHON"] == "/custom/python"
+
+
+def test_main_errors_when_go_cli_requested_but_binary_missing(
+    monkeypatch, capsys, tmp_path
+):
+    missing_path = tmp_path / "missing-langgraph"
+
+    monkeypatch.setenv("LANGGRAPH_USE_GO_CLI", "1")
+    monkeypatch.setenv("LANGGRAPH_GO_CLI_PATH", str(missing_path))
+
+    with pytest.raises(SystemExit, match="1"):
+        entrypoint.main(["build"])
+
+    err = capsys.readouterr().err
+    assert "LANGGRAPH_GO_CLI_PATH points to a missing file" in err
+
+
+def test_resolve_go_cli_path_prefers_override(monkeypatch, tmp_path):
+    override = tmp_path / "custom-langgraph"
+    override.write_text("")
+    bundled = tmp_path / "bin" / "langgraph"
+    bundled.parent.mkdir()
+    bundled.write_text("")
+
+    monkeypatch.setenv("LANGGRAPH_GO_CLI_PATH", str(override))
+    monkeypatch.setattr(entrypoint, "_bundled_go_cli_path", lambda: bundled)
+
+    assert entrypoint._resolve_go_cli_path() == override.resolve()
+
+
+def test_resolve_go_cli_path_uses_bundled_binary(monkeypatch, tmp_path):
+    bundled = tmp_path / "bin" / "langgraph"
+    bundled.parent.mkdir()
+    bundled.write_text("")
+
+    monkeypatch.delenv("LANGGRAPH_GO_CLI_PATH", raising=False)
+    monkeypatch.setattr(entrypoint, "_bundled_go_cli_path", lambda: bundled)
+
+    assert entrypoint._resolve_go_cli_path() == bundled
+
+
+def test_resolve_go_cli_path_returns_none_when_nothing_available(monkeypatch):
+    monkeypatch.delenv("LANGGRAPH_GO_CLI_PATH", raising=False)
+    monkeypatch.setattr(
+        entrypoint,
+        "_bundled_go_cli_path",
+        lambda: pathlib.Path("/definitely/not/present/langgraph"),
+    )
+
+    assert entrypoint._resolve_go_cli_path() is None
@@ -0,0 +1,67 @@
+import os
+import shutil
+import subprocess
+
+import pytest
+
+
+@pytest.fixture
+def go_cli_env():
+    if os.environ.get("LANGGRAPH_USE_GO_CLI") != "1":
+        pytest.skip("Go CLI smoke tests only run when LANGGRAPH_USE_GO_CLI=1")
+
+    langgraph = shutil.which("langgraph")
+    assert langgraph is not None, "langgraph executable is not installed"
+
+    env = os.environ.copy()
+    env["LANGGRAPH_USE_GO_CLI"] = "1"
+    return langgraph, env
+
+
+def test_go_cli_help(go_cli_env):
+    langgraph, env = go_cli_env
+
+    result = subprocess.run(
+        [langgraph, "--help"],
+        capture_output=True,
+        text=True,
+        env=env,
+        check=False,
+    )
+
+    assert result.returncode == 0, result.stderr
+    assert "Usage: langgraph" in result.stdout
+
+
+def test_go_cli_validate(go_cli_env, tmp_path):
+    langgraph, env = go_cli_env
+    config_path = tmp_path / "langgraph.json"
+    config_path.write_text(
+        '{"dependencies": ["langchain"], "graphs": {"agent": "./agent.py:graph"}}'
+    )
+
+    result = subprocess.run(
+        [langgraph, "validate", "-c", str(config_path)],
+        capture_output=True,
+        text=True,
+        env=env,
+        check=False,
+    )
+
+    assert result.returncode == 0, result.stderr
+    assert "is valid" in result.stdout
+
+
+def test_go_cli_dev_help(go_cli_env):
+    langgraph, env = go_cli_env
+
+    result = subprocess.run(
+        [langgraph, "dev", "--help"],
+        capture_output=True,
+        text=True,
+        env=env,
+        check=False,
+    )
+
+    assert result.returncode == 0, result.stderr
+    assert "Run LangGraph API server in development mode" in result.stdout
@@ -215,7 +215,7 @@ wheels = [

 [[package]]
 name = "langchain-core"
-version = "1.2.28"
+version = "1.2.27"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "jsonpatch" },
@@ -227,9 +227,9 @@ dependencies = [
    { name = "typing-extensions" },
    { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/f8/a4/317a1a3ac1df33a64adb3670bf88bbe3b3d5baa274db6863a979db472897/langchain_core-1.2.28.tar.gz", hash = "sha256:271a3d8bd618f795fdeba112b0753980457fc90537c46a0c11998516a74dc2cb", size = 846119, upload-time = "2026-04-08T18:19:34.867Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/13/5c/56d19a252bbb26247b7a7cd20821d48804d7ca03212fec709cd8db7c2516/langchain_core-1.2.27.tar.gz", hash = "sha256:c18372e4c4c1454d49bf23a2e484431e71bd39b64173a0f621f0fc283d7183a4", size = 844935, upload-time = "2026-04-07T14:56:32.364Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/a8/92/32f785f077c7e898da97064f113c73fbd9ad55d1e2169cf3a391b183dedb/langchain_core-1.2.28-py3-none-any.whl", hash = "sha256:80764232581eaf8057bcefa71dbf8adc1f6a28d257ebd8b95ba9b8b452e8c6ac", size = 508727, upload-time = "2026-04-08T18:19:32.823Z" },
+    { url = "https://files.pythonhosted.org/packages/c1/c3/6e0865bc130c448270eb9511b47863a3f9145cdb519b19f6e4758fa63d6f/langchain_core-1.2.27-py3-none-any.whl", hash = "sha256:9ecd6b0393b969fe88f6b9b309367134080ab095946d79e6937dd3911aa42bd5", size = 508315, upload-time = "2026-04-07T14:56:30.93Z" },
 ]

 [[package]]
@@ -290,7 +290,7 @@ wheels = [

 [[package]]
 name = "langsmith"
-version = "0.7.31"
+version = "0.7.26"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "httpx" },
@@ -303,9 +303,9 @@ dependencies = [
    { name = "xxhash" },
    { name = "zstandard" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/e6/11/696019490992db5c87774dc20515529ef42a01e1d770fb754ed6d9b12fb0/langsmith-0.7.31.tar.gz", hash = "sha256:331ee4f7c26bb5be4022b9859b7d7b122cbf8c9d01d9f530114c1914b0349ffb", size = 1178480, upload-time = "2026-04-14T17:55:41.242Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/76/86/6de4f6f0451a9658f26f633e0bb090552a4dafd7df3f1ae7f0d40558e67e/langsmith-0.7.26.tar.gz", hash = "sha256:a3e06f3d689ce7195717aa6b8f91082319819ec7ea9b9a62cdcd3d9dc25bfc7b", size = 1146118, upload-time = "2026-04-06T15:01:03.336Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/1d/a1/a013cf458c301cda86a213dd153ce0a01c93f1ab5833f951e6a44c9763ce/langsmith-0.7.31-py3-none-any.whl", hash = "sha256:0291d49203f6e80dda011af1afda61eb0595a4d697adb684590a8805e1d61fb6", size = 373276, upload-time = "2026-04-14T17:55:39.677Z" },
+    { url = "https://files.pythonhosted.org/packages/81/8e/7eb7d65ce62e98e74b9f18f193ea7ac3996d4fbd71fffcc67d0f7ba3103e/langsmith-0.7.26-py3-none-any.whl", hash = "sha256:fe5c877972cea450c1c48251c8fae0f18543c8d19dfdb9ff9a9c4263763dde4e", size = 360160, upload-time = "2026-04-06T15:01:01.516Z" },
 ]

 [[package]]
@@ -191,7 +191,7 @@ wheels = [

 [[package]]
 name = "langchain-core"
-version = "1.2.28"
+version = "1.2.27"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "jsonpatch" },
@@ -203,9 +203,9 @@ dependencies = [
    { name = "typing-extensions" },
    { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/f8/a4/317a1a3ac1df33a64adb3670bf88bbe3b3d5baa274db6863a979db472897/langchain_core-1.2.28.tar.gz", hash = "sha256:271a3d8bd618f795fdeba112b0753980457fc90537c46a0c11998516a74dc2cb", size = 846119, upload-time = "2026-04-08T18:19:34.867Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/13/5c/56d19a252bbb26247b7a7cd20821d48804d7ca03212fec709cd8db7c2516/langchain_core-1.2.27.tar.gz", hash = "sha256:c18372e4c4c1454d49bf23a2e484431e71bd39b64173a0f621f0fc283d7183a4", size = 844935, upload-time = "2026-04-07T14:56:32.364Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/a8/92/32f785f077c7e898da97064f113c73fbd9ad55d1e2169cf3a391b183dedb/langchain_core-1.2.28-py3-none-any.whl", hash = "sha256:80764232581eaf8057bcefa71dbf8adc1f6a28d257ebd8b95ba9b8b452e8c6ac", size = 508727, upload-time = "2026-04-08T18:19:32.823Z" },
+    { url = "https://files.pythonhosted.org/packages/c1/c3/6e0865bc130c448270eb9511b47863a3f9145cdb519b19f6e4758fa63d6f/langchain_core-1.2.27-py3-none-any.whl", hash = "sha256:9ecd6b0393b969fe88f6b9b309367134080ab095946d79e6937dd3911aa42bd5", size = 508315, upload-time = "2026-04-07T14:56:30.93Z" },
 ]

 [[package]]
@@ -266,7 +266,7 @@ wheels = [

 [[package]]
 name = "langsmith"
-version = "0.7.31"
+version = "0.7.26"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "httpx" },
@@ -279,9 +279,9 @@ dependencies = [
    { name = "xxhash" },
    { name = "zstandard" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/e6/11/696019490992db5c87774dc20515529ef42a01e1d770fb754ed6d9b12fb0/langsmith-0.7.31.tar.gz", hash = "sha256:331ee4f7c26bb5be4022b9859b7d7b122cbf8c9d01d9f530114c1914b0349ffb", size = 1178480, upload-time = "2026-04-14T17:55:41.242Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/76/86/6de4f6f0451a9658f26f633e0bb090552a4dafd7df3f1ae7f0d40558e67e/langsmith-0.7.26.tar.gz", hash = "sha256:a3e06f3d689ce7195717aa6b8f91082319819ec7ea9b9a62cdcd3d9dc25bfc7b", size = 1146118, upload-time = "2026-04-06T15:01:03.336Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/1d/a1/a013cf458c301cda86a213dd153ce0a01c93f1ab5833f951e6a44c9763ce/langsmith-0.7.31-py3-none-any.whl", hash = "sha256:0291d49203f6e80dda011af1afda61eb0595a4d697adb684590a8805e1d61fb6", size = 373276, upload-time = "2026-04-14T17:55:39.677Z" },
+    { url = "https://files.pythonhosted.org/packages/81/8e/7eb7d65ce62e98e74b9f18f193ea7ac3996d4fbd71fffcc67d0f7ba3103e/langsmith-0.7.26-py3-none-any.whl", hash = "sha256:fe5c877972cea450c1c48251c8fae0f18543c8d19dfdb9ff9a9c4263763dde4e", size = 360160, upload-time = "2026-04-06T15:01:01.516Z" },
 ]

 [[package]]
@@ -18,7 +18,7 @@
  <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>
+  <a href="https://x.com/langchain" target="_blank"><img src="https://img.shields.io/twitter/url/https/twitter.com/langchain.svg?style=social&label=Follow%20%40LangChain" alt="Twitter / X"></a>
 </div>

 <br>
@@ -1,7 +1,7 @@
 from __future__ import annotations

 from collections import ChainMap
-from collections.abc import Sequence
+from collections.abc import Mapping, Sequence
 from os import getenv
 from typing import Any, cast

@@ -217,16 +217,14 @@ def get_callback_manager_for_config(
            callbacks.add_tags(all_tags)
        if metadata := config.get("metadata"):
            callbacks.add_metadata(metadata)
-        manager = callbacks
+        return callbacks
    else:
        # otherwise create a new manager
-        manager = CallbackManager.configure(
+        return CallbackManager.configure(
            inheritable_callbacks=config.get("callbacks"),
            inheritable_tags=all_tags,
            inheritable_metadata=config.get("metadata"),
-            langsmith_inheritable_metadata=_get_tracing_metadata_defaults(config),
        )
-    return manager


 def get_async_callback_manager_for_config(
@@ -257,16 +255,14 @@ def get_async_callback_manager_for_config(
            callbacks.add_tags(all_tags)
        if metadata := config.get("metadata"):
            callbacks.add_metadata(metadata)
-        manager = callbacks
+        return callbacks
    else:
        # otherwise create a new manager
-        manager = AsyncCallbackManager.configure(
+        return AsyncCallbackManager.configure(
            inheritable_callbacks=config.get("callbacks"),
            inheritable_tags=all_tags,
            inheritable_metadata=config.get("metadata"),
-            langsmith_inheritable_metadata=_get_tracing_metadata_defaults(config),
        )
-    return manager


 def _is_not_empty(value: Any) -> bool:
@@ -312,54 +308,22 @@ def ensure_config(*configs: RunnableConfig | None) -> RunnableConfig:
        for k, v in config.items():
            if _is_not_empty(v) and k not in CONFIG_KEYS:
                empty[CONF][k] = v
-
-    configurable = empty.get("configurable")
-    metadata = empty.get("metadata")
-    if configurable and metadata is not None:
-        for key in _PROPAGATE_TO_METADATA:
-            if key in metadata:
-                continue
-            value = configurable.get(key)
-            if value:
-                metadata[key] = value
+    _empty_metadata = empty["metadata"]
+    for key, value in empty[CONF].items():
+        if _exclude_as_metadata(key, value, _empty_metadata):
+            continue
+        _empty_metadata[key] = value
    return empty


 _OMIT = ("key", "token", "secret", "password", "auth")


-def _exclude_as_metadata(key: str, value: Any) -> bool:
+def _exclude_as_metadata(key: str, value: Any, metadata: Mapping[str, Any]) -> bool:
    key_lower = key.casefold()
    return (
        key.startswith("__")
        or not isinstance(value, (str, int, float, bool))
+        or key in metadata
        or any(substr in key_lower for substr in _OMIT)
    )
-
-
-def _get_tracing_metadata_defaults(
-    config: RunnableConfig,
-) -> dict[str, Any] | None:
-    """Get tracer-only metadata defaults from configurable values."""
-    configurable = config.get("configurable")
-    if not configurable:
-        return None
-    metadata: dict[str, Any] = {}
-    for key, value in configurable.items():
-        if _exclude_as_metadata(key, value):
-            continue
-        metadata[key] = value
-    return metadata or None
-
-
-_PROPAGATE_TO_METADATA = frozenset(
-    (
-        "thread_id",
-        "checkpoint_id",
-        "checkpoint_ns",
-        "task_id",
-        "run_id",
-        "assistant_id",
-        "graph_id",
-    )
-)
@@ -12,9 +12,6 @@ RESUME = sys.intern("__resume__")
 # for values passed to resume a node after an interrupt
 ERROR = sys.intern("__error__")
 # for errors raised by nodes
-ERROR_SOURCE_NODE = sys.intern("__error_source_node__")
-# failed source node name for node-level error handlers
-# value format in pending writes: `(task_id, ERROR_SOURCE_NODE, node_name: str)`
 NO_WRITES = sys.intern("__no_writes__")
 # marker to signal node didn't write anything
 TASKS = sys.intern("__pregel_tasks")
@@ -59,8 +56,6 @@ CONFIG_KEY_CHECKPOINT_NS = sys.intern("checkpoint_ns")
 # holds the current checkpoint_ns, "" for root graph
 CONFIG_KEY_NODE_FINISHED = sys.intern("__pregel_node_finished")
 # holds a callback to be called when a node is finished
-CONFIG_KEY_TIMED_ATTEMPT_OBSERVER = sys.intern("__pregel_timed_attempt_observer")
-# holds a callback to be called when an idle-timed node attempt starts or finishes
 CONFIG_KEY_SCRATCHPAD = sys.intern("__pregel_scratchpad")
 # holds a mutable dict for temporary storage scoped to the current task
 CONFIG_KEY_RUNNER_SUBMIT = sys.intern("__pregel_runner_submit")
@@ -71,13 +66,6 @@ CONFIG_KEY_RUNTIME = sys.intern("__pregel_runtime")
 # holds a `Runtime` instance with context, store, stream writer, etc.
 CONFIG_KEY_RESUME_MAP = sys.intern("__pregel_resume_map")
 # holds a mapping of task ns -> resume value for resuming tasks
-CONFIG_KEY_STREAM_MESSAGES_V2 = sys.intern("__pregel_stream_messages_v2")
-# when True, attach StreamMessagesHandlerV2 so content-block (v2) events
-# flow through stream_mode="messages"; set by StreamingHandler only.
-CONFIG_KEY_NODE_ERROR = sys.intern("__pregel_node_error")
-# holds a `NodeError` (failed source node + exception) for the current
-# node-level error handler invocation, injected when handler signature
-# requests `error: NodeError`

 # --- Other constants ---
 PUSH = sys.intern("__pregel_push")
@@ -105,7 +93,6 @@ RESERVED = {
    INTERRUPT,
    RESUME,
    ERROR,
-    ERROR_SOURCE_NODE,
    NO_WRITES,
    # reserved config.configurable keys
    CONFIG_KEY_SEND,
@@ -119,9 +106,7 @@ RESERVED = {
    CONFIG_KEY_CHECKPOINT_MAP,
    CONFIG_KEY_CHECKPOINT_ID,
    CONFIG_KEY_CHECKPOINT_NS,
-    CONFIG_KEY_TIMED_ATTEMPT_OBSERVER,
    CONFIG_KEY_RESUME_MAP,
-    CONFIG_KEY_STREAM_MESSAGES_V2,
    # other constants
    PUSH,
    PULL,
@@ -51,11 +51,9 @@ from langgraph._internal._config import (
 )
 from langgraph._internal._constants import (
    CONF,
-    CONFIG_KEY_NODE_ERROR,
    CONFIG_KEY_RUNTIME,
 )
 from langgraph._internal._typing import MISSING
-from langgraph.errors import NodeError
 from langgraph.types import StreamWriter

 try:
@@ -119,19 +117,6 @@ def set_config_context(
        ctx.run(_unset_config_context, config_token, run)


-def create_task_in_config_context(
-    coro_factory: Callable[[], Coroutine[Any, Any, Any]], config: RunnableConfig
-) -> asyncio.Task[Any]:
-    """Create an asyncio.Task that inherits `config` as the child runnable context.
-
-    `asyncio.create_task` snapshots the current contextvars onto the new task,
-    so calling `create_task` while the config context is set ensures the task
-    sees `config` via `var_child_runnable_config` and any tracing parent.
-    """
-    with set_config_context(config) as context:
-        return context.run(lambda: asyncio.create_task(coro_factory()))
-
-
 # Before Python 3.11 native StrEnum is not available
 class StrEnum(str, enum.Enum):
    """A string enum."""
@@ -196,15 +181,6 @@ KWARGS_CONFIG_KEYS: tuple[tuple[str, tuple[Any, ...], str, Any], ...] = (
        "N/A",
        inspect.Parameter.empty,
    ),
-    (
-        "error",
-        (NodeError, "NodeError"),
-        # we never hit this block, we read directly from configurable
-        "N/A",
-        # default to None so non-handler nodes that happen to type a parameter
-        # `error: NodeError` don't blow up; handlers always receive a NodeError.
-        None,
-    ),
 )
 """List of kwargs that can be passed to functions, and their corresponding
 config keys, default values and type annotations.
@@ -378,8 +354,6 @@ class RunnableCallable(Runnable):
            kw_value: Any = MISSING
            if kw == "config":
                kw_value = config
-            elif kw == "error":
-                kw_value = config.get(CONF, {}).get(CONFIG_KEY_NODE_ERROR, MISSING)
            elif runtime:
                if kw == "runtime":
                    kw_value = runtime
@@ -452,8 +426,6 @@ class RunnableCallable(Runnable):
            kw_value: Any = MISSING
            if kw == "config":
                kw_value = config
-            elif kw == "error":
-                kw_value = config.get(CONF, {}).get(CONFIG_KEY_NODE_ERROR, MISSING)
            elif runtime:
                if kw == "runtime":
                    kw_value = runtime
@@ -1,25 +0,0 @@
-from __future__ import annotations
-
-from datetime import timedelta
-from typing import Literal
-
-from langgraph.types import TimeoutPolicy
-
-_SYNC_TIMEOUT_PREFIX = (
-    "Node timeouts are only supported for async nodes because sync Python "
-    "execution cannot be safely cancelled in-process."
-)
-
-
-def coerce_timeout_policy(
-    value: float | timedelta | TimeoutPolicy | None,
-) -> TimeoutPolicy | None:
-    """Normalize a timeout value to positive-second policy fields."""
-    return TimeoutPolicy.coerce(value)
-
-
-def sync_timeout_unsupported(
-    name: str, *, kind: Literal["Node", "Task"] = "Node"
-) -> ValueError:
-    """Build the canonical error for using `timeout` with a sync target."""
-    return ValueError(f"{_SYNC_TIMEOUT_PREFIX} {kind} {name!r} is sync.")
@@ -1,394 +0,0 @@
-"""Graph lifecycle callback interfaces and event payloads.
-
-This module defines the public callback surface for observing LangGraph-specific
-lifecycle transitions such as interrupt and resume.
-"""
-
-from __future__ import annotations
-
-from collections.abc import Sequence
-from dataclasses import dataclass
-from typing import Any, Literal, TypeAlias, TypeVar
-from uuid import UUID
-
-from langchain_core.callbacks import BaseCallbackHandler, BaseCallbackManager
-from langchain_core.callbacks.manager import ahandle_event, handle_event
-from langchain_core.runnables import RunnableConfig
-
-from langgraph.types import Interrupt
-
-__all__ = (
-    "GraphCallbackHandler",
-    "GraphInterruptEvent",
-    "GraphLifecycleEvent",
-    "GraphLifecycleStatus",
-    "GraphResumeEvent",
-    "get_async_graph_callback_manager_for_config",
-    "get_sync_graph_callback_manager_for_config",
-)
-
-
-GraphLifecycleStatus: TypeAlias = Literal[
-    "input",
-    "pending",
-    "done",
-    "interrupt_before",
-    "interrupt_after",
-    "out_of_steps",
-]
-"""Allowed lifecycle statuses reported in graph lifecycle callback events."""
-
-
-@dataclass(frozen=True)
-class GraphInterruptEvent:
-    """Graph lifecycle event emitted when execution pauses for interrupts."""
-
-    run_id: UUID | None
-    """Run id for the current graph execution, if available."""
-
-    status: GraphLifecycleStatus
-    """Loop status when the interrupt was captured."""
-
-    checkpoint_id: str
-    """Checkpoint id associated with the interrupted execution."""
-
-    checkpoint_ns: tuple[str, ...]
-    """Checkpoint namespace path for the current graph or subgraph."""
-
-    interrupts: tuple[Interrupt, ...]
-    """Interrupt payloads that caused the graph to pause."""
-
-
-@dataclass(frozen=True)
-class GraphResumeEvent:
-    """Graph lifecycle event emitted when execution resumes from a checkpoint."""
-
-    run_id: UUID | None
-    """Run id for the current graph execution, if available."""
-
-    status: GraphLifecycleStatus
-    """Loop status when the resume was captured."""
-
-    checkpoint_id: str
-    """Checkpoint id the graph resumed from."""
-
-    checkpoint_ns: tuple[str, ...]
-    """Checkpoint namespace path for the current graph or subgraph."""
-
-
-GraphLifecycleEvent: TypeAlias = GraphInterruptEvent | GraphResumeEvent
-"""Union of all public graph lifecycle callback event payloads.
-
-Use this alias when a callback or helper can receive either interrupt or resume
-lifecycle events.
-"""
-
-
-class GraphCallbackHandler(BaseCallbackHandler):
-    """Base class for graph-level lifecycle callbacks.
-
-    Subclass this handler to observe graph lifecycle transitions that are
-    specific to LangGraph execution, rather than generic LangChain runnable
-    callbacks.
-
-    Instances can be passed through `config["callbacks"]` when invoking a
-    graph. Only handlers that inherit from `GraphCallbackHandler` receive these
-    lifecycle events.
-    """
-
-    def on_interrupt(self, event: GraphInterruptEvent) -> Any:
-        """Run when graph execution pauses due to one or more interrupts.
-
-        Args:
-            event: Interrupt lifecycle event payload.
-        """
-
-    def on_resume(self, event: GraphResumeEvent) -> Any:
-        """Run when graph execution resumes from a persisted checkpoint.
-
-        Args:
-            event: Resume lifecycle event payload.
-        """
-
-
-_MISSING = object()
-
-
-def _filter_graph_handlers(
-    handlers: list[BaseCallbackHandler],
-) -> list[GraphCallbackHandler]:
-    return [h for h in handlers if isinstance(h, GraphCallbackHandler)]
-
-
-def _init_base_manager(
-    manager: BaseCallbackManager,
-    handlers: Sequence[GraphCallbackHandler] | None,
-    inheritable_handlers: Sequence[GraphCallbackHandler] | None,
-    parent_run_id: UUID | None,
-    *,
-    tags: list[str] | None,
-    inheritable_tags: list[str] | None,
-    metadata: dict[str, Any] | None,
-    inheritable_metadata: dict[str, Any] | None,
-    run_id: UUID | None,
-) -> None:
-    base_handlers: list[BaseCallbackHandler] = []
-    base_inheritable_handlers: list[BaseCallbackHandler] = []
-    if handlers is not None:
-        base_handlers.extend(handlers)
-    if inheritable_handlers is not None:
-        base_inheritable_handlers.extend(inheritable_handlers)
-    BaseCallbackManager.__init__(
-        manager,
-        handlers=base_handlers,
-        inheritable_handlers=base_inheritable_handlers,
-        parent_run_id=parent_run_id,
-        tags=tags,
-        inheritable_tags=inheritable_tags,
-        metadata=metadata,
-        inheritable_metadata=inheritable_metadata,
-    )
-    manager.run_id = run_id  # type: ignore[attr-defined]
-
-
-def _configure_graph_callbacks(
-    cls: type[_GraphManagerT],
-    callbacks: object | None,
-    *,
-    run_id: UUID | None,
-) -> _GraphManagerT:
-    if callbacks is None:
-        return cls(run_id=run_id)
-    if isinstance(callbacks, cls):
-        return callbacks.copy(run_id=run_id)
-    if isinstance(callbacks, (_GraphCallbackManager, _AsyncGraphCallbackManager)):
-        # Cross-type: extract handlers into the requested cls.
-        return cls(
-            handlers=_filter_graph_handlers(callbacks.handlers),
-            inheritable_handlers=_filter_graph_handlers(callbacks.inheritable_handlers),
-            parent_run_id=callbacks.parent_run_id,
-            tags=callbacks.tags.copy(),
-            inheritable_tags=callbacks.inheritable_tags.copy(),
-            metadata=callbacks.metadata.copy(),
-            inheritable_metadata=callbacks.inheritable_metadata.copy(),
-            run_id=run_id,
-        )
-    if isinstance(callbacks, BaseCallbackManager):
-        return cls(
-            handlers=_filter_graph_handlers(callbacks.handlers),
-            inheritable_handlers=_filter_graph_handlers(callbacks.inheritable_handlers),
-            parent_run_id=callbacks.parent_run_id,
-            tags=callbacks.tags.copy(),
-            inheritable_tags=callbacks.inheritable_tags.copy(),
-            metadata=callbacks.metadata.copy(),
-            inheritable_metadata=callbacks.inheritable_metadata.copy(),
-            run_id=run_id,
-        )
-    if isinstance(callbacks, GraphCallbackHandler):
-        return cls((callbacks,), run_id=run_id)
-    if isinstance(callbacks, (str, bytes)) or not isinstance(callbacks, Sequence):
-        raise TypeError("callbacks must be a handler, sequence, or manager")
-    return cls(_filter_graph_handlers(list(callbacks)), run_id=run_id)
-
-
-def _copy_graph_manager(
-    manager: _GraphCallbackManager | _AsyncGraphCallbackManager,
-    cls: type[_GraphManagerT],
-    run_id: UUID | None | object,
-) -> _GraphManagerT:
-    resolved_run_id: UUID | None
-    if run_id is _MISSING:
-        resolved_run_id = manager.run_id
-    else:
-        if run_id is not None and not isinstance(run_id, UUID):
-            raise TypeError("run_id must be a UUID or None")
-        resolved_run_id = run_id
-
-    return cls(
-        handlers=_filter_graph_handlers(manager.handlers),
-        inheritable_handlers=_filter_graph_handlers(manager.inheritable_handlers),
-        parent_run_id=manager.parent_run_id,
-        tags=manager.tags.copy(),
-        inheritable_tags=manager.inheritable_tags.copy(),
-        metadata=manager.metadata.copy(),
-        inheritable_metadata=manager.inheritable_metadata.copy(),
-        run_id=resolved_run_id,
-    )
-
-
-class _GraphCallbackManager(BaseCallbackManager):
-    """Sync dispatcher for graph lifecycle events."""
-
-    run_id: UUID | None
-
-    def __init__(
-        self,
-        handlers: Sequence[GraphCallbackHandler] | None = None,
-        inheritable_handlers: Sequence[GraphCallbackHandler] | None = None,
-        parent_run_id: UUID | None = None,
-        *,
-        tags: list[str] | None = None,
-        inheritable_tags: list[str] | None = None,
-        metadata: dict[str, Any] | None = None,
-        inheritable_metadata: dict[str, Any] | None = None,
-        run_id: UUID | None = None,
-    ) -> None:
-        _init_base_manager(
-            self,
-            handlers,
-            inheritable_handlers,
-            parent_run_id,
-            tags=tags,
-            inheritable_tags=inheritable_tags,
-            metadata=metadata,
-            inheritable_metadata=inheritable_metadata,
-            run_id=run_id,
-        )
-
-    def copy(
-        self,
-        *,
-        run_id: UUID | None | object = _MISSING,
-    ) -> _GraphCallbackManager:
-        return _copy_graph_manager(self, _GraphCallbackManager, run_id)
-
-    @classmethod
-    def configure(
-        cls,
-        callbacks: object | None = None,
-        *,
-        run_id: UUID | None = None,
-    ) -> _GraphCallbackManager:
-        return _configure_graph_callbacks(cls, callbacks, run_id=run_id)
-
-    def on_interrupt(self, event: GraphInterruptEvent) -> None:
-        handle_event(
-            self.handlers,
-            "on_interrupt",
-            None,
-            event,
-        )
-
-    def on_resume(self, event: GraphResumeEvent) -> None:
-        handle_event(
-            self.handlers,
-            "on_resume",
-            None,
-            event,
-        )
-
-
-class _AsyncGraphCallbackManager(BaseCallbackManager):
-    """Async dispatcher for graph lifecycle events."""
-
-    run_id: UUID | None
-
-    @property
-    def is_async(self) -> bool:
-        """Return whether the manager is async."""
-        return True
-
-    def __init__(
-        self,
-        handlers: Sequence[GraphCallbackHandler] | None = None,
-        inheritable_handlers: Sequence[GraphCallbackHandler] | None = None,
-        parent_run_id: UUID | None = None,
-        *,
-        tags: list[str] | None = None,
-        inheritable_tags: list[str] | None = None,
-        metadata: dict[str, Any] | None = None,
-        inheritable_metadata: dict[str, Any] | None = None,
-        run_id: UUID | None = None,
-    ) -> None:
-        _init_base_manager(
-            self,
-            handlers,
-            inheritable_handlers,
-            parent_run_id,
-            tags=tags,
-            inheritable_tags=inheritable_tags,
-            metadata=metadata,
-            inheritable_metadata=inheritable_metadata,
-            run_id=run_id,
-        )
-
-    def copy(
-        self,
-        *,
-        run_id: UUID | None | object = _MISSING,
-    ) -> _AsyncGraphCallbackManager:
-        return _copy_graph_manager(self, _AsyncGraphCallbackManager, run_id)
-
-    @classmethod
-    def configure(
-        cls,
-        callbacks: object | None = None,
-        *,
-        run_id: UUID | None = None,
-    ) -> _AsyncGraphCallbackManager:
-        return _configure_graph_callbacks(cls, callbacks, run_id=run_id)
-
-    async def on_interrupt(self, event: GraphInterruptEvent) -> None:
-        await ahandle_event(
-            self.handlers,
-            "on_interrupt",
-            None,
-            event,
-        )
-
-    async def on_resume(self, event: GraphResumeEvent) -> None:
-        await ahandle_event(
-            self.handlers,
-            "on_resume",
-            None,
-            event,
-        )
-
-
-_GraphManagerT = TypeVar(
-    "_GraphManagerT", _GraphCallbackManager, _AsyncGraphCallbackManager
-)
-
-GraphCallbacks: TypeAlias = (
-    _GraphCallbackManager
-    | _AsyncGraphCallbackManager
-    | BaseCallbackManager
-    | GraphCallbackHandler
-    | Sequence[BaseCallbackHandler]
-    | Sequence[GraphCallbackHandler]
-    | None
-)
-
-
-def get_sync_graph_callback_manager_for_config(
-    config: RunnableConfig,
-    *,
-    run_id: UUID | None = None,
-) -> _GraphCallbackManager:
-    """Build a sync graph lifecycle callback manager from a runnable config.
-
-    This helper filters `config["callbacks"]` down to handlers that inherit
-    from `GraphCallbackHandler` and binds the provided `run_id` onto the
-    returned manager.
-    """
-    return _GraphCallbackManager.configure(
-        config.get("callbacks"),
-        run_id=run_id,
-    )
-
-
-def get_async_graph_callback_manager_for_config(
-    config: RunnableConfig,
-    *,
-    run_id: UUID | None = None,
-) -> _AsyncGraphCallbackManager:
-    """Build an async graph lifecycle callback manager from a runnable config.
-
-    This helper filters `config["callbacks"]` down to handlers that inherit
-    from `GraphCallbackHandler` and binds the provided `run_id` onto the
-    returned manager.
-    """
-    return _AsyncGraphCallbackManager.configure(
-        config.get("callbacks"),
-        run_id=run_id,
-    )
@@ -1,7 +1,6 @@
 from langgraph.channels.any_value import AnyValue
 from langgraph.channels.base import BaseChannel
 from langgraph.channels.binop import BinaryOperatorAggregate
-from langgraph.channels.delta import DeltaChannel
 from langgraph.channels.ephemeral_value import EphemeralValue
 from langgraph.channels.last_value import LastValue, LastValueAfterFinish
 from langgraph.channels.named_barrier_value import (
@@ -21,7 +20,6 @@ __all__ = (
    "UntrackedValue",
    "EphemeralValue",
    "BinaryOperatorAggregate",
-    "DeltaChannel",
    "NamedBarrierValue",
    "NamedBarrierValueAfterFinish",
    # topics
@@ -22,9 +22,10 @@ __all__ = ("BinaryOperatorAggregate",)
 def _strip_extras(t):  # type: ignore[no-untyped-def]
    """Strips Annotated, Required and NotRequired from a given type."""
    if hasattr(t, "__origin__"):
-        if t.__origin__ in (Required, NotRequired):
-            return _strip_extras(t.__args__[0])
        return _strip_extras(t.__origin__)
+    if hasattr(t, "__origin__") and t.__origin__ in (Required, NotRequired):
+        return _strip_extras(t.__args__[0])
+
    return t


@@ -32,22 +33,11 @@ def _get_overwrite(value: Any) -> tuple[bool, Any]:
    """Inspects the given value and returns (is_overwrite, overwrite_value)."""
    if isinstance(value, Overwrite):
        return True, value.value
-    if isinstance(value, dict) and len(value) == 1 and OVERWRITE in value:
+    if isinstance(value, dict) and set(value.keys()) == {OVERWRITE}:
        return True, value[OVERWRITE]
    return False, None


-def _operators_equal(a: Callable, b: Callable) -> bool:
-    """Return True if two reducer operators should be considered equal.
-
-    Lambdas all share the name '<lambda>' so identity comparison is
-    unreliable; treat any pairing that includes a lambda as equal.
-    """
-    if a.__name__ == "<lambda>" or b.__name__ == "<lambda>":
-        return True
-    return a is b
-
-
 class BinaryOperatorAggregate(Generic[Value], BaseChannel[Value, Value, Value]):
    """Stores the result of applying a binary operator to the current value and each new value.

@@ -78,8 +68,11 @@ class BinaryOperatorAggregate(Generic[Value], BaseChannel[Value, Value, Value]):
            self.value = MISSING

    def __eq__(self, value: object) -> bool:
-        return isinstance(value, BinaryOperatorAggregate) and _operators_equal(
-            self.operator, value.operator
+        return isinstance(value, BinaryOperatorAggregate) and (
+            value.operator is self.operator
+            if value.operator.__name__ != "<lambda>"
+            and self.operator.__name__ != "<lambda>"
+            else True
        )

    @property
@@ -1,192 +0,0 @@
-from __future__ import annotations
-
-import collections.abc
-import copy as _copy
-from collections.abc import Callable, Sequence
-from typing import Any, Generic
-
-from langgraph.checkpoint.base import PendingWrite
-from langgraph.checkpoint.serde.types import _DeltaSnapshot
-from typing_extensions import Self
-
-from langgraph._internal._typing import MISSING
-from langgraph.channels.base import BaseChannel, Value
-from langgraph.channels.binop import _get_overwrite, _operators_equal, _strip_extras
-from langgraph.errors import (
-    EmptyChannelError,
-    ErrorCode,
-    InvalidUpdateError,
-    create_error_message,
-)
-
-__all__ = ("DeltaChannel",)
-
-
-class DeltaChannel(Generic[Value], BaseChannel[Any, Any, Any]):
-    """Reducer channel that stores only a sentinel in checkpoint blobs and
-    reconstructs state by replaying ancestor writes through the reducer.
-
-    The reducer receives the current accumulated value and a batch of writes
-    in one call: `reducer(state, [write1, write2, ...]) -> new_state`.
-
-    Reducers must be deterministic and batching-invariant (associative across
-    folds): applying two consecutive write batches separately must produce the
-    same state as applying their concatenation once:
-
-        reducer(reducer(state, xs), ys) == reducer(state, xs + ys)
-
-    This lets LangGraph replay checkpointed writes in larger batches than they
-    were originally produced without changing reconstructed state.
-
-    Snapshot cadence is driven by per-channel update count. `create_checkpoint`
-    writes a full `_DeltaSnapshot` blob every `snapshot_frequency` updates to
-    this channel, bounding replay depth.
-
-    Parameters:
-        reducer: `(state, list[writes]) -> new_state`. Must be deterministic
-            and batching-invariant as described above.
-        typ: The value type (e.g. `list`, `dict`). Inferred automatically
-            from the outer type when used inside `Annotated[T, DeltaChannel(...)]`.
-        snapshot_frequency: Every Nth update to this channel writes a snapshot
-            blob (default `1000`). Must be a positive int.
-    """
-
-    __slots__ = ("value", "reducer", "snapshot_frequency")
-    value: Value | Any
-
-    def __init__(
-        self,
-        reducer: Callable[[Any, Sequence[Any]], Any],
-        typ: type[Value] | None = None,
-        *,
-        snapshot_frequency: int = 1000,
-    ) -> None:
-        if snapshot_frequency <= 0:
-            raise ValueError(
-                f"snapshot_frequency must be a positive int, got {snapshot_frequency}"
-            )
-        if typ is None:
-            typ = list  # type: ignore[assignment]  # placeholder; overridden by _is_field_channel
-        super().__init__(typ)
-        self.reducer = reducer
-        self.snapshot_frequency = snapshot_frequency
-        typ = _strip_extras(typ)
-        if typ in (collections.abc.Sequence, collections.abc.MutableSequence):
-            typ = list
-        if typ in (collections.abc.Set, collections.abc.MutableSet):
-            typ = set
-        if typ in (collections.abc.Mapping, collections.abc.MutableMapping):
-            typ = dict
-        self.typ = typ
-        self.value: Any = MISSING
-
-    def __eq__(self, other: object) -> bool:
-        if not isinstance(other, DeltaChannel):
-            return False
-        if self.snapshot_frequency != other.snapshot_frequency:
-            return False
-        return _operators_equal(self.reducer, other.reducer)
-
-    @property
-    def ValueType(self) -> Any:
-        return self.typ
-
-    @property
-    def UpdateType(self) -> Any:
-        return self.typ
-
-    def copy(self) -> Self:
-        new = self.__class__(
-            self.reducer, self.typ, snapshot_frequency=self.snapshot_frequency
-        )
-        new.key = self.key
-        new.value = self.value if self.value is MISSING else _copy.copy(self.value)
-        return new
-
-    def from_checkpoint(self, checkpoint: Any) -> Self:
-        """Initialize from a stored blob.
-
-        Blob types:
-          * `MISSING`: start empty; caller replays writes.
-          * `_DeltaSnapshot(value)`: restore value directly from snapshot.
-          * plain value (migration from old `BinaryOperatorAggregate` blobs):
-            use directly.
-        """
-        new = self.__class__(
-            self.reducer, self.typ, snapshot_frequency=self.snapshot_frequency
-        )
-        new.key = self.key
-        if checkpoint is MISSING:
-            new.value = self.typ()
-        elif isinstance(checkpoint, _DeltaSnapshot):
-            new.value = checkpoint.value
-        else:
-            new.value = checkpoint
-        return new
-
-    def replay_writes(self, writes: Sequence[PendingWrite]) -> None:
-        """Apply ancestor writes oldest-to-newest via a single reducer call.
-
-        If any write is an Overwrite, the last one in the sequence acts as
-        the reset point: its value becomes the new base and only writes
-        after it are passed to the reducer.
-        """
-        values = [v for _, _, v in writes]
-        if not values:
-            return
-        base = self.value
-        start = 0
-        for i, v in enumerate(values):
-            is_ow, ow_value = _get_overwrite(v)
-            if is_ow:
-                base = _copy.copy(ow_value) if ow_value is not None else self.typ()
-                start = i + 1
-        remaining = values[start:]
-        self.value = self.reducer(base, remaining) if remaining else base
-
-    def update(self, values: Sequence[Any]) -> bool:
-        if not values:
-            return False
-        overwrite_idx: int | None = None
-        for i, v in enumerate(values):
-            is_ow, _ = _get_overwrite(v)
-            if is_ow:
-                if overwrite_idx is not None:
-                    msg = create_error_message(
-                        message="Can receive only one Overwrite value per super-step.",
-                        error_code=ErrorCode.INVALID_CONCURRENT_GRAPH_UPDATE,
-                    )
-                    raise InvalidUpdateError(msg)
-                overwrite_idx = i
-        if overwrite_idx is not None:
-            _, overwrite_value = _get_overwrite(values[overwrite_idx])
-            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))
-        return True
-
-    def get(self) -> Any:
-        if self.value is MISSING:
-            raise EmptyChannelError()
-        return self.value
-
-    def is_available(self) -> bool:
-        return self.value is not MISSING
-
-    def checkpoint(self) -> Any:
-        """Return stored representation: always `MISSING`.
-
-        Snapshot decisions live in `create_checkpoint` (which has the channel
-        version) and write `_DeltaSnapshot(ch.get())` directly into
-        `channel_values`. For non-snapshot steps the channel does not appear
-        in `channel_values`; reconstruction walks ancestor writes via the
-        saver's `get_delta_channel_history`.
-        """
-        return MISSING
@@ -1,9 +1,8 @@
 from __future__ import annotations

 from collections.abc import Sequence
-from dataclasses import dataclass
 from enum import Enum
-from typing import Any, Literal
+from typing import Any
 from warnings import warn

 # EmptyChannelError is re-exported from langgraph.channels.base
@@ -16,14 +15,11 @@ from langgraph.warnings import LangGraphDeprecatedSinceV10
 __all__ = (
    "EmptyChannelError",
    "ErrorCode",
-    "GraphDrained",
    "GraphRecursionError",
    "InvalidUpdateError",
    "GraphBubbleUp",
    "GraphInterrupt",
-    "NodeError",
    "NodeInterrupt",
-    "NodeTimeoutError",
    "ParentCommand",
    "EmptyInputError",
    "TaskNotFound",
@@ -46,23 +42,6 @@ def create_error_message(*, message: str, error_code: ErrorCode) -> str:
    )


-class GraphBubbleUp(Exception):
-    pass
-
-
-class GraphDrained(GraphBubbleUp):
-    """Raised when a graph run exits early due to a drain request.
-
-    This indicates the graph stopped cooperatively at a superstep boundary
-    because `RunControl.request_drain()` was called (e.g., in response to
-    SIGTERM). The checkpoint is saved and the run can be resumed later.
-    """
-
-    def __init__(self, reason: str = "shutdown") -> None:
-        self.reason = reason
-        super().__init__(f"Graph drained: {reason}")
-
-
 class GraphRecursionError(RecursionError):
    """Raised when the graph has exhausted the maximum number of steps.

@@ -98,6 +77,10 @@ class InvalidUpdateError(Exception):
    pass


+class GraphBubbleUp(Exception):
+    pass
+
+
 class GraphInterrupt(GraphBubbleUp):
    """Raised when a subgraph is interrupted, suppressed by the root graph.
    Never raised directly, or surfaced to the user."""
@@ -142,77 +125,3 @@ class TaskNotFound(Exception):
    """Raised when the executor is unable to find a task (for distributed mode)."""

    pass
-
-
-@dataclass(frozen=True, slots=True)
-class NodeError:
-    """Failure context passed to a node-level error handler.
-
-    Inject by adding a parameter typed `NodeError` to a handler registered via
-    `StateGraph.add_node(..., error_handler=...)`:
-
-    ```python
-    def handler(state: State, error: NodeError) -> Command:
-        return Command(update={"status": f"recovered from {error.node}: {error.error}"})
-    ```
-    """
-
-    node: str
-    """Name of the node whose execution failed."""
-
-    error: BaseException
-    """Exception raised by the failed node."""
-
-
-class NodeTimeoutError(Exception):
-    """Raised when a node invocation exceeds one of its configured timeouts.
-
-    Does **not** inherit from the built-in `TimeoutError` (a subclass of
-    `OSError`) so that the default `RetryPolicy` treats it as retryable.
-
-    Both `idle_timeout` and `run_timeout` reflect the configured policy at the
-    time of the failure (each is `None` if not configured). `kind` and
-    `timeout` identify which one fired.
-    """
-
-    node: str
-    timeout: float
-    run_timeout: float | None
-    idle_timeout: float | None
-    elapsed: float
-    kind: Literal["idle", "run"]
-
-    def __init__(
-        self,
-        node: str,
-        elapsed: float,
-        *,
-        kind: Literal["idle", "run"],
-        idle_timeout: float | None = None,
-        run_timeout: float | None = None,
-    ) -> None:
-        if kind == "idle":
-            if idle_timeout is None:
-                raise ValueError("idle_timeout is required when kind='idle'")
-            message = (
-                f"Node '{node}' exceeded its idle timeout of "
-                f"{idle_timeout:.3f}s without making progress "
-                f"(elapsed: {elapsed:.3f}s)."
-            )
-            self.timeout = idle_timeout
-        elif kind == "run":
-            if run_timeout is None:
-                raise ValueError("run_timeout is required when kind='run'")
-            message = (
-                f"Node '{node}' exceeded its run timeout of "
-                f"{run_timeout:.3f}s (elapsed: {elapsed:.3f}s)."
-            )
-            self.timeout = run_timeout
-        else:
-            raise ValueError("kind must be 'idle' or 'run'")
-        super().__init__(message)
-        self.node = node
-        self.elapsed = elapsed
-        self.kind = kind
-        self.idle_timeout = idle_timeout
-        self.run_timeout = run_timeout
@@ -5,7 +5,6 @@ import inspect
 import warnings
 from collections.abc import Awaitable, Callable, Sequence
 from dataclasses import dataclass
-from datetime import timedelta
 from typing import (
    Any,
    Generic,
@@ -23,11 +22,6 @@ from typing_extensions import Unpack

 from langgraph._internal import _serde
 from langgraph._internal._constants import CACHE_NS_WRITES, PREVIOUS
-from langgraph._internal._runnable import is_async_callable
-from langgraph._internal._timeout import (
-    coerce_timeout_policy,
-    sync_timeout_unsupported,
-)
 from langgraph._internal._typing import MISSING, DeprecatedKwargs
 from langgraph.channels.ephemeral_value import EphemeralValue
 from langgraph.channels.last_value import LastValue
@@ -37,19 +31,13 @@ from langgraph.pregel._call import (
    P,
    SyncAsyncFuture,
    T,
-    _call_with_options,
+    call,
    get_runnable_for_entrypoint,
    identifier,
 )
 from langgraph.pregel._read import PregelNode
 from langgraph.pregel._write import ChannelWrite, ChannelWriteEntry
-from langgraph.types import (
-    _DC_KWARGS,
-    CachePolicy,
-    RetryPolicy,
-    StreamMode,
-    TimeoutPolicy,
-)
+from langgraph.types import _DC_KWARGS, CachePolicy, RetryPolicy, StreamMode
 from langgraph.typing import ContextT
 from langgraph.warnings import LangGraphDeprecatedSinceV05, LangGraphDeprecatedSinceV10

@@ -63,7 +51,6 @@ class _TaskFunction(Generic[P, T]):
        *,
        retry_policy: Sequence[RetryPolicy],
        cache_policy: CachePolicy[Callable[P, str | bytes]] | None = None,
-        timeout: TimeoutPolicy | None = None,
        name: str | None = None,
    ) -> None:
        if name is not None:
@@ -80,17 +67,15 @@ class _TaskFunction(Generic[P, T]):
        self.func = func
        self.retry_policy = retry_policy
        self.cache_policy = cache_policy
-        self.timeout = timeout
        functools.update_wrapper(self, func)

    def __call__(self, *args: P.args, **kwargs: P.kwargs) -> SyncAsyncFuture[T]:
-        return _call_with_options(
+        return call(
            self.func,
-            args,
-            kwargs,
            retry_policy=self.retry_policy,
            cache_policy=self.cache_policy,
-            timeout=self.timeout,
+            *args,
+            **kwargs,
        )

    def clear_cache(self, cache: BaseCache) -> None:
@@ -113,7 +98,6 @@ def task(
    name: str | None = None,
    retry_policy: RetryPolicy | Sequence[RetryPolicy] | None = None,
    cache_policy: CachePolicy[Callable[P, str | bytes]] | None = None,
-    timeout: float | timedelta | TimeoutPolicy | None = None,
    **kwargs: Unpack[DeprecatedKwargs],
 ) -> Callable[
    [Callable[P, Awaitable[T]] | Callable[P, T]],
@@ -135,7 +119,6 @@ def task(
    name: str | None = None,
    retry_policy: RetryPolicy | Sequence[RetryPolicy] | None = None,
    cache_policy: CachePolicy[Callable[P, str | bytes]] | None = None,
-    timeout: float | timedelta | TimeoutPolicy | None = None,
    **kwargs: Unpack[DeprecatedKwargs],
 ) -> (
    Callable[[Callable[P, Awaitable[T]] | Callable[P, T]], _TaskFunction[P, T]]
@@ -159,14 +142,6 @@ def task(
        name: An optional name for the task. If not provided, the function name will be used.
        retry_policy: An optional retry policy (or list of policies) to use for the task in case of a failure.
        cache_policy: An optional cache policy to use for the task. This allows caching of the task results.
-        timeout: Timeout for each task attempt. A number or `timedelta` is a hard
-            wall-clock cap and is not refreshed. Use `TimeoutPolicy` to configure
-            both a wall-clock `run_timeout` and an `idle_timeout` refreshed by
-            progress signals. For long-running work that doesn't naturally emit
-            progress, call `runtime.heartbeat()` from inside the task. When the
-            timeout fires, `NodeTimeoutError` is raised and the retry policy (if
-            any) decides whether to retry. Supported only for async tasks; sync
-            tasks cannot be safely cancelled in-process.

    Returns:
        A callable function when used as a decorator.
@@ -221,7 +196,6 @@ def task(
        )
        if retry_policy is None:
            retry_policy = retry  # type: ignore[assignment]
-    timeout_policy = coerce_timeout_policy(timeout)

    retry_policies: Sequence[RetryPolicy] = (
        ()
@@ -234,15 +208,8 @@ def task(
    def decorator(
        func: Callable[P, Awaitable[T]] | Callable[P, T],
    ) -> Callable[P, SyncAsyncFuture[T]]:
-        if timeout_policy is not None and not is_async_callable(func):
-            name_ = name or getattr(func, "__name__", func.__class__.__name__)
-            raise sync_timeout_unsupported(str(name_), kind="Task")
        return _TaskFunction(
-            func,
-            retry_policy=retry_policies,
-            cache_policy=cache_policy,
-            timeout=timeout_policy,
-            name=name,
+            func, retry_policy=retry_policies, cache_policy=cache_policy, name=name
        )

    if __func_or_none__ is not None:
@@ -301,15 +268,6 @@ class entrypoint(Generic[ContextT]):
            passed to the workflow.
        cache_policy: A cache policy to use for caching the results of the workflow.
        retry_policy: A retry policy (or list of policies) to use for the workflow in case of a failure.
-        timeout: Timeout for each workflow attempt. A number or `timedelta` is a
-            hard wall-clock cap and is not refreshed. Use `TimeoutPolicy` to
-            configure both a wall-clock `run_timeout` and an `idle_timeout`
-            refreshed by progress signals. For long-running work that doesn't
-            naturally emit progress, call `runtime.heartbeat()` from inside the
-            workflow. When the timeout fires, `NodeTimeoutError` is raised and
-            the retry policy (if any) decides whether to retry. Supported only
-            for async workflows; sync workflows cannot be safely cancelled
-            in-process.

    !!! warning "`config_schema` Deprecated"
        The `config_schema` parameter is deprecated in v0.6.0 and support will be removed in v2.0.0.
@@ -442,7 +400,6 @@ class entrypoint(Generic[ContextT]):
        context_schema: type[ContextT] | None = None,
        cache_policy: CachePolicy | None = None,
        retry_policy: RetryPolicy | Sequence[RetryPolicy] | None = None,
-        timeout: float | timedelta | TimeoutPolicy | None = None,
        **kwargs: Unpack[DeprecatedKwargs],
    ) -> None:
        """Initialize the entrypoint decorator."""
@@ -469,7 +426,6 @@ class entrypoint(Generic[ContextT]):
        self.cache = cache
        self.cache_policy = cache_policy
        self.retry_policy = retry_policy
-        self.timeout = coerce_timeout_policy(timeout)
        self.context_schema = context_schema

    @dataclass(**_DC_KWARGS)
@@ -579,7 +535,6 @@ class entrypoint(Generic[ContextT]):
                    bound=bound,
                    triggers=[START],
                    channels=START,
-                    timeout=self.timeout,
                    writers=[
                        ChannelWrite(
                            [
@@ -9,7 +9,7 @@ from langgraph.store.base import BaseStore

 from langgraph._internal._typing import EMPTY_SEQ
 from langgraph.runtime import Runtime
-from langgraph.types import CachePolicy, RetryPolicy, StreamWriter, TimeoutPolicy
+from langgraph.types import CachePolicy, RetryPolicy, StreamWriter
 from langgraph.typing import ContextT, NodeInputT, NodeInputT_contra


@@ -88,8 +88,5 @@ class StateNodeSpec(Generic[NodeInputT, ContextT]):
    input_schema: type[NodeInputT]
    retry_policy: RetryPolicy | Sequence[RetryPolicy] | None
    cache_policy: CachePolicy | None
-    is_error_handler: bool = False
-    error_handler_node: str | None = None
    ends: tuple[str, ...] | dict[str, str] | None = EMPTY_SEQ
    defer: bool = False
-    timeout: TimeoutPolicy | None = None
@@ -244,71 +244,6 @@ def add_messages(
    return merged


-def _messages_delta_reducer(
-    state: list[AnyMessage], writes: list[list[AnyMessage]]
-) -> list[AnyMessage]:
-    """**Experimental.** Batch reducer for use with `DeltaChannel`.
-
-    Processes all writes in one pass — dedup by ID, `RemoveMessage`
-    tombstoning — without calling `add_messages`.
-
-    This reducer is batching-invariant, as required by `DeltaChannel`:
-    `reducer(reducer(state, xs), ys) == reducer(state, xs + ys)`.
-
-    Raw dict / string / tuple inputs are coerced to typed `BaseMessage`
-    objects so that HTTP-driven graphs work without a separate coercion
-    step. This is not full `add_messages` parity — `REMOVE_ALL_MESSAGES`,
-    unknown-id `RemoveMessage` errors, missing-id UUID assignment, and
-    `BaseMessageChunk` conversion are not handled here.
-
-    Example::
-
-        from typing import Annotated
-        from langgraph.channels.delta import DeltaChannel
-        from langgraph.graph.message import _messages_delta_reducer
-
-        class State(TypedDict):
-            messages: Annotated[list, DeltaChannel(_messages_delta_reducer)]
-    """
-
-    # Each write is either a list of message-likes or a single message-like
-    # (BaseMessage / dict / str / tuple). Only lists flatten; everything
-    # else is one message.
-    flat: list[Any] = []
-    for w in writes:
-        if isinstance(w, list):
-            flat.extend(w)
-        else:
-            flat.append(w)
-    # Steady state: the reducer's own output is already typed, so skip
-    # `convert_to_messages` on state when the first element is a BaseMessage.
-    # Only raw input (initial dicts, deserialized blobs) hits the slow path.
-    if state and isinstance(state[0], BaseMessage):
-        state_msgs = state
-    else:
-        state_msgs = cast("list[AnyMessage]", convert_to_messages(state))
-    msgs = cast("list[AnyMessage]", convert_to_messages(flat))
-
-    index: dict[str, int] = {
-        m.id: i for i, m in enumerate(state_msgs) if m.id is not None
-    }
-    result: list[AnyMessage | None] = list(state_msgs)
-    for msg in msgs:
-        mid = msg.id
-        if mid is None:
-            result.append(msg)
-        elif isinstance(msg, RemoveMessage):
-            if mid in index:
-                result[index[mid]] = None
-                del index[mid]
-        elif mid in index:
-            result[index[mid]] = msg
-        else:
-            index[mid] = len(result)
-            result.append(msg)
-    return [m for m in result if m is not None]
-
-
@deprecated(
    "MessageGraph is deprecated in langgraph 1.0.0, to be removed in 2.0.0. Please use StateGraph with a `messages` key instead.",
    category=None,
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Will Fu-Hinthorn	c53a91376c	Add Go CLI CI smoke coverage	2026-04-08 16:07:25 -07:00
Will Fu-Hinthorn	fa2a8f0a92	Fix Go CLI parity and wheel packaging	2026-04-08 14:50:52 -07:00
Will Fu-Hinthorn	f9d5b0bc15	Merge branch 'main' into wfh/cli_validate	2026-04-08 05:56:49 -07:00
Will Fu-Hinthorn	998aa88ea1	update	2026-04-08 05:47:23 -07:00
Will Fu-Hinthorn	627cf19464	update	2026-04-08 05:40:59 -07:00
Will Fu-Hinthorn	8e89c8b155	chore: migration 1	2026-04-08 04:46:31 -07:00
Will Fu-Hinthorn	98fd216ce7	release	2026-04-07 18:20:20 -07:00
Will Fu-Hinthorn	247ef5edf7	chore: add validate command	2026-04-07 18:20:10 -07:00
Will Fu-Hinthorn	648f03d715	chore: validate	2026-04-07 17:56:19 -07:00