# Builds and publishes LangChain packages to PyPI.
#
# Manually triggered, though can be used as a reusable workflow (workflow_call).
#
# Handles version bumping, building, and publishing to PyPI with authentication.

name: "🚀 Package Release"
# Run title resolves dropdown values to the published package name (e.g.
# `core` -> `langchain-core`, `openai` -> `langchain-openai`). Falls back to
# the raw input for override and `workflow_call` cases, which already pass
# a full path. Three dropdown values don't follow `langchain-{name}`:
# `langchain` -> `langchain-classic`, `langchain_v1` -> `langchain`,
# `standard-tests` -> `langchain-tests`.
run-name: >-
  Release ${{ inputs.working-directory-override ||
  (startsWith(inputs.working-directory, 'libs/') && inputs.working-directory) ||
  (inputs.working-directory == 'langchain' && 'langchain-classic') ||
  (inputs.working-directory == 'langchain_v1' && 'langchain') ||
  (inputs.working-directory == 'standard-tests' && 'langchain-tests') ||
  format('langchain-{0}', inputs.working-directory) }} ${{
  inputs.release-version }}
on:
  workflow_call:
    inputs:
      working-directory:
        required: true
        type: string
        description: "From which folder this pipeline executes"
      allow-prereleases:
        required: false
        type: boolean
        default: false
        description: "Pass `--prerelease=allow` to wheel-install steps so
          transitive prerelease deps (e.g. langgraph-checkpoint>=4.1.0a3 pulled
          in by an alpha langgraph) resolve. Use only when the release itself
          is a prerelease and at least one dep is also a prerelease."
  workflow_dispatch:
    inputs:
      working-directory:
        required: true
        type: choice
        description: "From which folder this pipeline executes"
        default: "langchain_v1"
        # Short names only — `EFFECTIVE_WORKING_DIR` below re-adds the `libs/`
        # or `libs/partners/` prefix. When adding a new option, also update the
        # non-partner allowlist in `EFFECTIVE_WORKING_DIR` if it isn't a partner
        # package (partners are the default branch).
        options:
          - core
          - langchain
          - langchain_v1
          - text-splitters
          - standard-tests
          - model-profiles
          - anthropic
          - chroma
          - deepseek
          - exa
          - fireworks
          - groq
          - huggingface
          - mistralai
          - nomic
          - ollama
          - openai
          - openrouter
          - perplexity
          - qdrant
          - xai
      working-directory-override:
        required: false
        type: string
        description: "Manual override — takes precedence over dropdown (e.g.
          libs/partners/partner-xyz)"
      release-version:
        required: true
        type: string
        default: "0.1.0"
        description: "New version of package being released"
      dangerous-nonmaster-release:
        required: false
        type: boolean
        default: false
        description: "Release from a non-master branch (danger!) - Only use for hotfixes"
      allow-prereleases:
        required: false
        type: boolean
        default: false
        description: "Pass `--prerelease=allow` to wheel-install steps so
          transitive prerelease deps (e.g. langgraph-checkpoint>=4.1.0a3 pulled
          in by an alpha langgraph) resolve. Use only when the release itself
          is a prerelease and at least one dep is also a prerelease."

env:
  PYTHON_VERSION: "3.11"
  UV_FROZEN: "true"
  UV_NO_SYNC: "true"
  # Resolves to a full path. Accepts either:
  #   - `working-directory-override` as a full path (e.g. `libs/partners/partner-xyz`)
  #   - `working-directory` as a full path (from `workflow_call` callers)
  #   - `working-directory` as a short dropdown name (from `workflow_dispatch`)
  EFFECTIVE_WORKING_DIR: >-
    ${{
      inputs.working-directory-override
      || (startsWith(inputs.working-directory, 'libs/') && inputs.working-directory)
      || (contains(fromJSON('["core","langchain","langchain_v1","text-splitters","standard-tests","model-profiles"]'), inputs.working-directory) && format('libs/{0}', inputs.working-directory))
      || format('libs/partners/{0}', inputs.working-directory)
    }}

permissions:
  contents: read # Job-level overrides grant write only where needed (mark-release)

jobs:
  # Build the distribution package and extract version info
  # Runs in isolated environment with minimal permissions for security
  build:
    name: 📦 Build distribution
    if: github.ref == 'refs/heads/master' || inputs.dangerous-nonmaster-release
    environment: Release
    runs-on: ubuntu-latest
    permissions:
      contents: read

    outputs:
      pkg-name: ${{ steps.check-version.outputs.pkg-name }}
      version: ${{ steps.check-version.outputs.version }}

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - name: Set up Python + uv
        uses: "./.github/actions/uv_setup"
        with:
          python-version: ${{ env.PYTHON_VERSION }}
          enable-cache: "false"

      # We want to keep this build stage *separate* from the release stage,
      # so that there's no sharing of permissions between them.
      # (Release stage has trusted publishing and GitHub repo contents write access,
      # which the build stage must not have access to.)
      #
      # Otherwise, a malicious `build` step (e.g. via a compromised dependency)
      # could get access to our GitHub or PyPI credentials.
      #
      # Per the trusted publishing GitHub Action:
      # > 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 project for distribution
        run: uv build
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}

      - name: Upload build
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
        with:
          name: dist
          path: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/

      - name: Check version
        id: check-version
        shell: python
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}
        run: |
          import os
          import tomllib
          with open("pyproject.toml", "rb") as f:
              data = tomllib.load(f)
          pkg_name = data["project"]["name"]
          version = data["project"]["version"]
          with open(os.environ["GITHUB_OUTPUT"], "a") as f:
              f.write(f"pkg-name={pkg_name}\n")
              f.write(f"version={version}\n")
  release-notes:
    name: 📝 Generate release notes
    # release-notes must run before publishing because its check-tags step
    # validates version/tag state — do not remove this dependency.
    needs:
      - build
    runs-on: ubuntu-latest
    permissions:
      contents: read
    outputs:
      release-body: ${{ steps.generate-release-body.outputs.release-body }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          repository: langchain-ai/langchain
          path: langchain
          sparse-checkout: | # this only grabs files for relevant dir
            ${{ env.EFFECTIVE_WORKING_DIR }}
          ref: ${{ github.ref }} # this scopes to just ref'd branch
          fetch-depth: 0 # this fetches entire commit history
      - name: Check tags
        id: check-tags
        shell: bash
        working-directory: langchain/${{ env.EFFECTIVE_WORKING_DIR }}
        env:
          PKG_NAME: ${{ needs.build.outputs.pkg-name }}
          VERSION: ${{ needs.build.outputs.version }}
        run: |
          # Handle regular versions and pre-release versions differently
          if [[ "$VERSION" == *"-"* ]]; then
            # This is a pre-release version (contains a hyphen)
            # Extract the base version without the pre-release suffix
            BASE_VERSION=${VERSION%%-*}
            # Look for the latest release of the same base version
            REGEX="^$PKG_NAME==$BASE_VERSION\$"
            PREV_TAG=$(git tag --sort=-creatordate | (grep -P "$REGEX" || true) | head -1)

            # If no exact base version match, look for the latest release of any kind
            if [ -z "$PREV_TAG" ]; then
              REGEX="^$PKG_NAME==\\d+\\.\\d+\\.\\d+\$"
              PREV_TAG=$(git tag --sort=-creatordate | (grep -P "$REGEX" || true) | head -1)
            fi
          else
            # Regular version handling
            PREV_TAG="$PKG_NAME==${VERSION%.*}.$(( ${VERSION##*.} - 1 ))"; [[ "${VERSION##*.}" -eq 0 ]] && PREV_TAG=""

            # backup case if releasing e.g. 0.3.0, looks up last release
            # note if last release (chronologically) was e.g. 0.1.47 it will get
            # that instead of the last 0.2 release
            if [ -z "$PREV_TAG" ]; then
              REGEX="^$PKG_NAME==\\d+\\.\\d+\\.\\d+\$"
              echo $REGEX
              PREV_TAG=$(git tag --sort=-creatordate | (grep -P $REGEX || true) | head -1)
            fi
          fi

          # if PREV_TAG is empty or came out to 0.0.0, let it be empty
          if [ -z "$PREV_TAG" ] || [ "$PREV_TAG" = "$PKG_NAME==0.0.0" ]; then
            echo "No previous tag found - first release"
          else
            # confirm prev-tag actually exists in git repo with git tag
            GIT_TAG_RESULT=$(git tag -l "$PREV_TAG")
            if [ -z "$GIT_TAG_RESULT" ]; then
              echo "Previous tag $PREV_TAG not found in git repo"
              exit 1
            fi
          fi


          TAG="${PKG_NAME}==${VERSION}"
          if [ "$TAG" == "$PREV_TAG" ]; then
            echo "No new version to release"
            exit 1
          fi
          echo tag="$TAG" >> $GITHUB_OUTPUT
          echo prev-tag="$PREV_TAG" >> $GITHUB_OUTPUT
      - name: Generate release body
        id: generate-release-body
        working-directory: langchain
        env:
          WORKING_DIR: ${{ env.EFFECTIVE_WORKING_DIR }}
          PKG_NAME: ${{ needs.build.outputs.pkg-name }}
          TAG: ${{ steps.check-tags.outputs.tag }}
          PREV_TAG: ${{ steps.check-tags.outputs.prev-tag }}
        run: |
          PREAMBLE="Changes since $PREV_TAG"
          # if PREV_TAG is empty or 0.0.0, then we are releasing the first version
          if [ -z "$PREV_TAG" ] || [ "$PREV_TAG" = "$PKG_NAME==0.0.0" ]; then
            PREAMBLE="Initial release"
            PREV_TAG=$(git rev-list --max-parents=0 HEAD)
          fi
          {
            echo 'release-body<<EOF'
            echo $PREAMBLE
            echo
            git log --format="%s" "$PREV_TAG"..HEAD -- $WORKING_DIR
            echo EOF
          } >> "$GITHUB_OUTPUT"

  pre-release-checks:
    name: ✅ Pre-release checks
    needs:
      - build
      - release-notes
    environment: Release
    runs-on: ubuntu-latest
    permissions:
      contents: read
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      # We explicitly *don't* set up caching here. This ensures our tests are
      # maximally sensitive to catching breakage.
      #
      # For example, here's a way that caching can cause a falsely-passing test:
      # - Make the langchain package manifest no longer list a dependency package
      #   as a requirement. This means it won't be installed by `pip install`,
      #   and attempting to use it would cause a crash.
      # - That dependency used to be required, so it may have been cached.
      #   When restoring the venv packages from cache, that dependency gets included.
      # - Tests pass, because the dependency is present even though it wasn't specified.
      # - The package is published, and it breaks on the missing dependency when
      #   used in the real world.

      - name: Set up Python + uv
        uses: "./.github/actions/uv_setup"
        id: setup-python
        with:
          python-version: ${{ env.PYTHON_VERSION }}
          enable-cache: "false"

      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: dist
          path: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/

      - name: Import dist package
        shell: bash
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}
        env:
          PKG_NAME: ${{ needs.build.outputs.pkg-name }}
          VERSION: ${{ needs.build.outputs.version }}
          PRERELEASE_FLAG: ${{ inputs.allow-prereleases && '--prerelease=allow' || '' }}
        # Install directly from the locally-built wheel (no index resolution needed).
        # `PRERELEASE_FLAG` is empty by default; opt-in via the `allow-prereleases`
        # workflow input lets transitive prerelease deps resolve during alpha
        # release cycles. Stable-release safety is still enforced by the
        # `Check for prerelease versions` step below.
        run: |
          uv venv
          VIRTUAL_ENV=.venv uv pip install $PRERELEASE_FLAG dist/*.whl

          # Replace all dashes in the package name with underscores,
          # since that's how Python imports packages with dashes in the name.
          # also remove _official suffix
          IMPORT_NAME="$(echo "$PKG_NAME" | sed s/-/_/g | sed s/_official//g)"

          uv run python -c "import $IMPORT_NAME; print(dir($IMPORT_NAME))"

      - name: Import test dependencies
        run: uv sync --group test
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}

      # Overwrite the local version of the package with the built version
      - name: Import published package (again)
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}
        shell: bash
        env:
          PKG_NAME: ${{ needs.build.outputs.pkg-name }}
          VERSION: ${{ needs.build.outputs.version }}
          PRERELEASE_FLAG: ${{ inputs.allow-prereleases && '--prerelease=allow' || '' }}
        run: |
          VIRTUAL_ENV=.venv uv pip install $PRERELEASE_FLAG dist/*.whl

      - name: Check for prerelease versions
        # Block release if any dependencies allow prerelease versions
        # (unless this is itself a prerelease version)
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}
        run: |
          uv run python $GITHUB_WORKSPACE/.github/scripts/check_prerelease_dependencies.py pyproject.toml

      - name: Run unit tests
        run: make tests
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}

      - name: Get minimum versions
        # Find the minimum published versions that satisfies the given constraints
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}
        id: min-version
        run: |
          VIRTUAL_ENV=.venv uv pip install packaging requests
          python_version="$(uv run python --version | awk '{print $2}')"
          min_versions="$(uv run python $GITHUB_WORKSPACE/.github/scripts/get_min_versions.py pyproject.toml release $python_version)"
          echo "min-versions=$min_versions" >> "$GITHUB_OUTPUT"
          echo "min-versions=$min_versions"

      - name: Run unit tests with minimum dependency versions
        if: ${{ steps.min-version.outputs.min-versions != '' }}
        env:
          MIN_VERSIONS: ${{ steps.min-version.outputs.min-versions }}
          PRERELEASE_FLAG: ${{ inputs.allow-prereleases && '--prerelease=allow' || '' }}
        run: |
          VIRTUAL_ENV=.venv uv pip install $PRERELEASE_FLAG --force-reinstall --editable .
          VIRTUAL_ENV=.venv uv pip install $PRERELEASE_FLAG --force-reinstall $MIN_VERSIONS
          make tests PYTEST_EXTRA="-q -k 'not test_serdes'"
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}

      - name: Import integration test dependencies
        run: uv sync --group test --group test_integration
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}

      - name: Run integration tests
        # Uses the Makefile's `integration_tests` target for the specified package
        if: ${{ startsWith(env.EFFECTIVE_WORKING_DIR, 'libs/partners/') }}
        env:
          AI21_API_KEY: ${{ secrets.AI21_API_KEY }}
          GOOGLE_API_KEY: ${{ secrets.GOOGLE_API_KEY }}
          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
          MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
          TOGETHER_API_KEY: ${{ secrets.TOGETHER_API_KEY }}
          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
          AZURE_OPENAI_API_VERSION: ${{ secrets.AZURE_OPENAI_API_VERSION }}
          AZURE_OPENAI_API_BASE: ${{ secrets.AZURE_OPENAI_API_BASE }}
          AZURE_OPENAI_API_KEY: ${{ secrets.AZURE_OPENAI_API_KEY }}
          AZURE_OPENAI_CHAT_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_CHAT_DEPLOYMENT_NAME }}
          AZURE_OPENAI_LEGACY_CHAT_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_LEGACY_CHAT_DEPLOYMENT_NAME }}
          AZURE_OPENAI_LLM_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_LLM_DEPLOYMENT_NAME }}
          AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME }}
          NVIDIA_API_KEY: ${{ secrets.NVIDIA_API_KEY }}
          GOOGLE_SEARCH_API_KEY: ${{ secrets.GOOGLE_SEARCH_API_KEY }}
          GOOGLE_CSE_ID: ${{ secrets.GOOGLE_CSE_ID }}
          GROQ_API_KEY: ${{ secrets.GROQ_API_KEY }}
          HUGGINGFACEHUB_API_TOKEN: ${{ secrets.HUGGINGFACEHUB_API_TOKEN }}
          EXA_API_KEY: ${{ secrets.EXA_API_KEY }}
          NOMIC_API_KEY: ${{ secrets.NOMIC_API_KEY }}
          WATSONX_APIKEY: ${{ secrets.WATSONX_APIKEY }}
          WATSONX_PROJECT_ID: ${{ secrets.WATSONX_PROJECT_ID }}
          ASTRA_DB_API_ENDPOINT: ${{ secrets.ASTRA_DB_API_ENDPOINT }}
          ASTRA_DB_APPLICATION_TOKEN: ${{ secrets.ASTRA_DB_APPLICATION_TOKEN }}
          ASTRA_DB_KEYSPACE: ${{ secrets.ASTRA_DB_KEYSPACE }}
          ES_URL: ${{ secrets.ES_URL }}
          ES_CLOUD_ID: ${{ secrets.ES_CLOUD_ID }}
          ES_API_KEY: ${{ secrets.ES_API_KEY }}
          MONGODB_ATLAS_URI: ${{ secrets.MONGODB_ATLAS_URI }}
          UPSTAGE_API_KEY: ${{ secrets.UPSTAGE_API_KEY }}
          FIREWORKS_API_KEY: ${{ secrets.FIREWORKS_API_KEY }}
          XAI_API_KEY: ${{ secrets.XAI_API_KEY }}
          DEEPSEEK_API_KEY: ${{ secrets.DEEPSEEK_API_KEY }}
          PPLX_API_KEY: ${{ secrets.PPLX_API_KEY }}
          OLLAMA_API_KEY: ${{ secrets.OLLAMA_API_KEY }}
          OPENROUTER_API_KEY: ${{ secrets.OPENROUTER_API_KEY }}
          LANGCHAIN_TESTS_USER_AGENT: ${{ secrets.LANGCHAIN_TESTS_USER_AGENT }}
        run: make integration_tests
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}

  test-pypi-publish:
    name: 🧪 Publish to TestPyPI
    # release-notes must run before publishing because its check-tags step
    # validates version/tag state — do not remove this dependency.
    needs:
      - build
      - release-notes
      - pre-release-checks
    environment: Release
    runs-on: ubuntu-latest
    permissions:
      # This permission is used for trusted publishing:
      # https://blog.pypi.org/posts/2023-04-20-introducing-trusted-publishers/
      #
      # Trusted publishing has to also be configured on PyPI for each package:
      # https://docs.pypi.org/trusted-publishers/adding-a-publisher/
      id-token: write

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: dist
          path: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/

      - name: Publish to test PyPI
        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
        with:
          packages-dir: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/
          verbose: true
          print-hash: true
          repository-url: https://test.pypi.org/legacy/
          # We overwrite any existing distributions with the same name and version.
          # This is *only for CI use* and is *extremely dangerous* otherwise!
          # https://github.com/pypa/gh-action-pypi-publish#tolerating-release-package-file-duplicates
          skip-existing: true
          # Temp workaround since attestations are on by default as of gh-action-pypi-publish v1.11.0
          attestations: false

  # Test select published packages against new core
  # Done when code changes are made to langchain-core
  test-prior-published-packages-against-new-core:
    name: 🔄 Test prior partners against new core
    # Installs the new core with old partners: Installs the new unreleased core
    # alongside the previously published partner packages and runs integration tests
    needs:
      - build
      - release-notes
      - test-pypi-publish
      - pre-release-checks
    environment: Release
    runs-on: ubuntu-latest
    permissions:
      contents: read
    strategy:
      matrix:
        partner: [ anthropic ]
      fail-fast: false # Continue testing other partners if one fails
    env:
      ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
      ANTHROPIC_FILES_API_IMAGE_ID: ${{ secrets.ANTHROPIC_FILES_API_IMAGE_ID }}
      ANTHROPIC_FILES_API_PDF_ID: ${{ secrets.ANTHROPIC_FILES_API_PDF_ID }}
      OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
      AZURE_OPENAI_API_VERSION: ${{ secrets.AZURE_OPENAI_API_VERSION }}
      AZURE_OPENAI_API_BASE: ${{ secrets.AZURE_OPENAI_API_BASE }}
      AZURE_OPENAI_API_KEY: ${{ secrets.AZURE_OPENAI_API_KEY }}
      AZURE_OPENAI_CHAT_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_CHAT_DEPLOYMENT_NAME }}
      AZURE_OPENAI_LEGACY_CHAT_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_LEGACY_CHAT_DEPLOYMENT_NAME }}
      AZURE_OPENAI_LLM_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_LLM_DEPLOYMENT_NAME }}
      AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME }}
      LANGCHAIN_TESTS_USER_AGENT: ${{ secrets.LANGCHAIN_TESTS_USER_AGENT }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      # We implement this conditional as Github Actions does not have good support
      # for conditionally needing steps. https://github.com/actions/runner/issues/491
      # TODO: this seems to be resolved upstream, so we can probably remove this workaround
      - name: Check if libs/core
        run: |
          if [ "${{ startsWith(env.EFFECTIVE_WORKING_DIR, 'libs/core') }}" != "true" ]; then
            echo "Not in libs/core. Exiting successfully."
            exit 0
          fi

      - name: Set up Python + uv
        if: startsWith(env.EFFECTIVE_WORKING_DIR, 'libs/core')
        uses: "./.github/actions/uv_setup"
        with:
          python-version: ${{ env.PYTHON_VERSION }}
          enable-cache: "false"

      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        if: startsWith(env.EFFECTIVE_WORKING_DIR, 'libs/core')
        with:
          name: dist
          path: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/

      - name: Test against ${{ matrix.partner }}
        if: startsWith(env.EFFECTIVE_WORKING_DIR, 'libs/core')
        env:
          PRERELEASE_FLAG: ${{ inputs.allow-prereleases && '--prerelease=allow' || '' }}
        run: |
          # Identify latest tag, excluding pre-releases
          LATEST_PACKAGE_TAG="$(
            git ls-remote --tags origin "langchain-${{ matrix.partner }}*" \
            | awk '{print $2}' \
            | sed 's|refs/tags/||' \
            | grep -E '[0-9]+\.[0-9]+\.[0-9]+$' \
            | sort -Vr \
            | head -n 1
          )"
          echo "Latest package tag: $LATEST_PACKAGE_TAG"

          # Shallow-fetch just that single tag
          git fetch --depth=1 origin tag "$LATEST_PACKAGE_TAG"

          # Checkout the latest package files
          rm -rf $GITHUB_WORKSPACE/libs/partners/${{ matrix.partner }}/*
          rm -rf $GITHUB_WORKSPACE/libs/standard-tests/*
          cd $GITHUB_WORKSPACE/libs/
          git checkout "$LATEST_PACKAGE_TAG" -- standard-tests/
          git checkout "$LATEST_PACKAGE_TAG" -- partners/${{ matrix.partner }}/
          cd partners/${{ matrix.partner }}

          # Print as a sanity check
          echo "Version number from pyproject.toml: "
          cat pyproject.toml | grep "version = "

          # Run tests
          uv sync --group test --group test_integration
          uv pip install $PRERELEASE_FLAG ../../core/dist/*.whl
          make integration_tests

  # Test external packages that depend on langchain-core/langchain against the new release
  # Only runs for core and langchain_v1 releases to catch breaking changes before publish
  test-dependents:
    name: "🐍 Test dependent: ${{ matrix.package.path }} (Python ${{
      matrix.python-version }})"
    needs:
      - build
      - release-notes
      - test-pypi-publish
      - pre-release-checks
    runs-on: ubuntu-latest
    permissions:
      contents: read
    # Only run for core or langchain_v1 releases.
    # Job-level 'if' does not support env context; must use inputs directly.
    if: >-
      startsWith(inputs.working-directory-override || inputs.working-directory,
      'libs/core') || startsWith(inputs.working-directory-override ||
      inputs.working-directory, 'libs/langchain_v1')
    strategy:
      fail-fast: false
      matrix:
        python-version: [ "3.11", "3.13" ]
        package:
          - name: deepagents
            repo: langchain-ai/deepagents
            path: libs/deepagents
    # No API keys needed for now - deepagents `make test` only runs unit tests

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          path: langchain

      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
        with:
          repository: ${{ matrix.package.repo }}
          path: ${{ matrix.package.name }}

      - name: Set up Python + uv
        uses: "./langchain/.github/actions/uv_setup"
        with:
          python-version: ${{ matrix.python-version }}
          enable-cache: "false"

      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: dist
          path: dist/

      - name: Install ${{ matrix.package.name }} with local packages
        # External dependents don't have [tool.uv.sources] pointing to this repo,
        # so we install the package normally then override with the built wheel.
        env:
          PRERELEASE_FLAG: ${{ inputs.allow-prereleases && '--prerelease=allow' || '' }}
        run: |
          cd ${{ matrix.package.name }}/${{ matrix.package.path }}

          # Install the package with test dependencies
          uv sync --group test

          # Override with the built wheel from this release
          uv pip install $PRERELEASE_FLAG $GITHUB_WORKSPACE/dist/*.whl

      - name: Run ${{ matrix.package.name }} tests
        run: |
          cd ${{ matrix.package.name }}/${{ matrix.package.path }}
          make test

  publish:
    name: 🚀 Publish to PyPI
    # Publishes the package to PyPI
    needs:
      - build
      - release-notes
      - test-pypi-publish
      - pre-release-checks
      - test-dependents
      # - test-prior-published-packages-against-new-core
      # Run if all needed jobs succeeded or were skipped (test-dependents only runs for core/langchain_v1)
    if: ${{ !cancelled() && !failure() }}
    environment: Release
    runs-on: ubuntu-latest
    permissions:
      # This permission is used for trusted publishing:
      # https://blog.pypi.org/posts/2023-04-20-introducing-trusted-publishers/
      #
      # Trusted publishing has to also be configured on PyPI for each package:
      # https://docs.pypi.org/trusted-publishers/adding-a-publisher/
      id-token: write

    defaults:
      run:
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - name: Set up Python + uv
        uses: "./.github/actions/uv_setup"
        with:
          python-version: ${{ env.PYTHON_VERSION }}
          enable-cache: "false"

      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: dist
          path: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/

      - name: Publish package distributions to PyPI
        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # release/v1
        with:
          packages-dir: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/
          verbose: true
          print-hash: true
          # Temp workaround since attestations are on by default as of gh-action-pypi-publish v1.11.0
          attestations: false

  mark-release:
    name: 🏷️ Tag GitHub release
    # Marks the GitHub release with the new version tag
    needs:
      - build
      - release-notes
      - test-pypi-publish
      - pre-release-checks
      - publish
    # Run if all needed jobs succeeded or were skipped
    if: ${{ !cancelled() && !failure() }}
    environment: Release
    runs-on: ubuntu-latest
    permissions:
      # This permission is needed by `ncipollo/release-action` to
      # create the GitHub release/tag
      contents: write

    defaults:
      run:
        working-directory: ${{ env.EFFECTIVE_WORKING_DIR }}

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - name: Set up Python + uv
        uses: "./.github/actions/uv_setup"
        with:
          python-version: ${{ env.PYTHON_VERSION }}
          enable-cache: "false"

      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: dist
          path: ${{ env.EFFECTIVE_WORKING_DIR }}/dist/

      - name: Create Tag
        uses: ncipollo/release-action@339a81892b84b4eeb0f6e744e4574d79d0d9b8dd # v1
        with:
          artifacts: "dist/*"
          token: ${{ secrets.GITHUB_TOKEN }}
          generateReleaseNotes: false
          tag: ${{needs.build.outputs.pkg-name}}==${{ needs.build.outputs.version }}
          body: ${{ needs.release-notes.outputs.release-body }}
          commit: ${{ github.sha }}
          makeLatest: ${{ needs.build.outputs.pkg-name == 'langchain-core'}}
