deepseek-harness/.github/workflows/ci.yml

name: CI

on:
  pull_request:
permissions:
  contents: read

env:
  PRIMARY_NODE_VERSION: '24'
  # CI runs must never report to the production telemetry endpoint baked
  # into apps/cli/cordis.yml (AppCLIEntry disables the row when set).
  DSH_TELEMETRY_DISABLED: '1'

# Cancel a superseded pull-request run on a new push so a fresh head does not
# queue a second full 9-job run behind a stale one (paid enterprise runners
# would otherwise stack with no auto-cancellation).
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:

  # Three enterprise jobs isolate coverage, static analysis, and the
  # build-backed consumer tail. The consumer job owns the only Linux build so
  # all three jobs enter runner allocation independently.
  #
  # FAILOVER (Linux): each Linux enterprise job resolves its pool through the
  # DSH_CI_FAILOVER_LINUX repository variable. Unset (normal), the expressions
  # pick the hosted enterprise pools below. Setting the variable to
  # 'selfhosted' (repo Settings → Actions → Variables; writer-manageable
  # repository state — not PR-editable, no merge required) retargets all
  # three onto the in-house
  # vm-backup pool and re-running the failed jobs is the entire switch —
  # see .agents/notes/implemented/process/2026-07-26-ci-failover-runbook.md. The
  # in-house pool's readiness is re-proven on every master push by the
  # serial-linux-selfhosted standby lane in ci-master.yml. The Windows failover
  # switch is the separate DSH_CI_FAILOVER_WINDOWS variable on the windows-native
  # job below.
  node-24:
    if: github.event_name == 'pull_request'
    runs-on: >-
      ${{ vars.DSH_CI_FAILOVER_LINUX == 'selfhosted'
          && github.event.pull_request.user.login != 'dependabot[bot]'
          && fromJSON('["self-hosted", "linux", "x64", "vm-backup"]')
          || 'dsh-ubuntu-24-04-16core' }}
    name: node 24 / static
    env:
      DSH_GATE_CONCURRENCY: '8'
      # Stop the aggregate at the first blocking gate failure so a red run
      # does not keep burning enterprise runner time on the remaining gates.
      DSH_GATE_FAIL_FAST: '1'
    steps:
      # Runner cleanup owns tool caches and fixtures, including cancelled runs.
      - name: Use runner-owned temporary storage
        run: |
          echo "TMPDIR=${{ runner.temp }}" >> "$GITHUB_ENV"
          echo "npm_config_cache=${{ runner.temp }}/npm-cache" >> "$GITHUB_ENV"

      # Fetch complete history so the archive gate can read the trusted PR base from a reused shallow checkout.
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
          persist-credentials: false

      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-${{ github.run_id }}-${{ github.run_attempt }}

      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}

      - name: Configure pnpm store path
        id: pnpm-store
        run: |
          store_root="${RUNNER_TEMP%/*}/pnpm-store"
          echo "PNPM_CONFIG_STORE_DIR=$store_root" >> "$GITHUB_ENV"
          store_path=$(PNPM_CONFIG_STORE_DIR="$store_root" pnpm store path --silent)
          echo "path=$store_path" >> "$GITHUB_OUTPUT"

      # Pull requests consume the default-branch cache but do not put cache
      # compression and upload on the paid latency-critical path. Skipped
      # under failover — see the coverage lane's identical rationale.
      - uses: actions/cache/restore@v4
        if: vars.DSH_CI_FAILOVER_LINUX != 'selfhosted' || github.event.pull_request.user.login == 'dependabot[bot]'
        with:
          path: ${{ steps.pnpm-store.outputs.path }}
          key: ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-${{ hashFiles('pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-

      - name: Install (immutable)
        run: pnpm install --frozen-lockfile

      - name: Run static gates
        env:
          DSH_ARCHIVE_BASE_REF: ${{ github.event.pull_request.base.sha }}
        run: pnpm run check:ci:static

  node-24-coverage:
    if: github.event_name == 'pull_request'
    runs-on: >-
      ${{ vars.DSH_CI_FAILOVER_LINUX == 'selfhosted'
          && github.event.pull_request.user.login != 'dependabot[bot]'
          && fromJSON('["self-hosted", "linux", "x64", "vm-backup"]')
          || 'dsh-ubuntu-24-04-16core' }}
    name: node 24 / coverage
    env:
      # Partitioning replaces the instrumented share; this budget gives the
      # exempt-heavy gate two workers on both hosted and failover runners.
      DSH_COVERAGE_MAX_WORKERS: '6'
      DSH_COVERAGE_PARTITIONS: '4'
      DSH_GATE_CONCURRENCY: '3'
      # A gate failure aborts the sibling gate instead of waiting out its
      # multi-minute instrumented run.
      DSH_GATE_FAIL_FAST: '1'
    steps:
      # Runner cleanup owns tool caches and fixtures, including cancelled runs.
      - name: Use runner-owned temporary storage
        run: |
          echo "TMPDIR=${{ runner.temp }}" >> "$GITHUB_ENV"
          echo "npm_config_cache=${{ runner.temp }}/npm-cache" >> "$GITHUB_ENV"

      - uses: actions/checkout@v6
        with:
          persist-credentials: false

      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-${{ github.run_id }}-${{ github.run_attempt }}

      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}

      - name: Configure pnpm store path
        id: pnpm-store
        run: |
          store_root="${RUNNER_TEMP%/*}/pnpm-store"
          echo "PNPM_CONFIG_STORE_DIR=$store_root" >> "$GITHUB_ENV"
          store_path=$(PNPM_CONFIG_STORE_DIR="$store_root" pnpm store path --silent)
          echo "path=$store_path" >> "$GITHUB_OUTPUT"

      # Self-hosted runners retain their own stores between jobs.
      # Hosted runners restore the remote cache into their ephemeral store.
      - uses: actions/cache/restore@v4
        if: vars.DSH_CI_FAILOVER_LINUX != 'selfhosted' || github.event.pull_request.user.login == 'dependabot[bot]'
        with:
          path: ${{ steps.pnpm-store.outputs.path }}
          key: ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-${{ hashFiles('pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-

      - name: Install dependencies and prepare bubblewrap
        run: |
          pnpm install --frozen-lockfile &
          install_pid=$!
          bash scripts/prepare-ci-bubblewrap.sh &
          sandbox_pid=$!
          install_status=0
          wait "$install_pid" || install_status=$?
          sandbox_status=0
          wait "$sandbox_pid" || sandbox_status=$?
          if (( install_status != 0 )); then exit "$install_status"; fi
          exit "$sandbox_status"

      - name: Run exhaustive coverage
        run: pnpm run check:ci:coverage

  node-24-bench:
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-24.04
    name: node 24 / benchmarks
    # Wall-clock budgets need an otherwise idle runner, so this job runs the
    # benchmark lane alone instead of joining a concurrent gate aggregate.
    timeout-minutes: 15
    steps:
      - uses: actions/checkout@v6
        with:
          persist-credentials: false

      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-${{ github.run_id }}-${{ github.run_attempt }}

      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}

      - name: Configure pnpm store path
        id: pnpm-store
        run: |
          store_root="$HOME/.local/share/pnpm/store"
          echo "PNPM_CONFIG_STORE_DIR=$store_root" >> "$GITHUB_ENV"
          store_path=$(PNPM_CONFIG_STORE_DIR="$store_root" pnpm store path --silent)
          echo "path=$store_path" >> "$GITHUB_OUTPUT"

      - uses: actions/cache/restore@v4
        with:
          path: ${{ steps.pnpm-store.outputs.path }}
          key: ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-${{ hashFiles('pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-

      - name: Install (immutable)
        run: pnpm install --frozen-lockfile

      - name: Run performance benchmarks
        env:
          DSH_GATE_VERBOSE: '1'
        run: pnpm run check:ci:bench

  node-24-consumers:
    if: github.event_name == 'pull_request'
    runs-on: >-
      ${{ vars.DSH_CI_FAILOVER_LINUX == 'selfhosted'
          && github.event.pull_request.user.login != 'dependabot[bot]'
          && fromJSON('["self-hosted", "linux", "x64", "vm-backup"]')
          || 'dsh-ubuntu-24-04-16core' }}
    name: node 24 / snapshots and artifacts
    env:
      DSH_GATE_CONCURRENCY: '10'
      DSH_NODE_COMPAT_SKIP_TYPECHECK: '1'
      DSH_OXLINT_THREADS: '8'
      DSH_PUBLINT_CONCURRENCY: '8'
      DSH_WEB_SNAPSHOT_WORKERS: '6'
      # A failing gate aborts its running siblings: a failing build stops the
      # independent Node compatibility smoke, and a failing reader (e.g.
      # publint) stops the remaining artifact consumers.
      DSH_GATE_FAIL_FAST: '1'
      # Failover halves snapshot concurrency for the shared 64-core VM.
      DSH_SNAPSHOT_MAX_CONCURRENCY: ${{ vars.DSH_CI_FAILOVER_LINUX == 'selfhosted' && github.event.pull_request.user.login != 'dependabot[bot]' && '12' || '32' }}
    steps:
      # Runner cleanup owns tool caches and fixtures, including cancelled runs.
      - name: Use runner-owned temporary storage
        run: |
          echo "TMPDIR=${{ runner.temp }}" >> "$GITHUB_ENV"
          echo "npm_config_cache=${{ runner.temp }}/npm-cache" >> "$GITHUB_ENV"
          echo "PLAYWRIGHT_BROWSERS_PATH=${RUNNER_TEMP%/*}/ms-playwright" >> "$GITHUB_ENV"

      - uses: actions/checkout@v6
        with:
          persist-credentials: false

      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-${{ github.run_id }}-${{ github.run_attempt }}

      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}

      - name: Configure pnpm store path
        id: pnpm-store
        run: |
          store_root="${RUNNER_TEMP%/*}/pnpm-store"
          echo "PNPM_CONFIG_STORE_DIR=$store_root" >> "$GITHUB_ENV"
          store_path=$(PNPM_CONFIG_STORE_DIR="$store_root" pnpm store path --silent)
          echo "path=$store_path" >> "$GITHUB_OUTPUT"

      # Pull requests restore the pnpm store and Playwright caches without paying
      # compression and upload on the required path. No master job saves these
      # hosted cache keys, so each restore-keys fallback hits the matching archived
      # entry until it evicts, after which the store is cold. Self-hosted runners
      # keep their own persistent stores instead of restoring the remote archive.
      - uses: actions/cache/restore@v4
        if: vars.DSH_CI_FAILOVER_LINUX != 'selfhosted' || github.event.pull_request.user.login == 'dependabot[bot]'
        with:
          path: ${{ steps.pnpm-store.outputs.path }}
          key: ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-${{ hashFiles('pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-

      # Self-hosted runners retain their own browser cache between jobs.
      - uses: actions/cache/restore@v4
        if: vars.DSH_CI_FAILOVER_LINUX != 'selfhosted' || github.event.pull_request.user.login == 'dependabot[bot]'
        with:
          path: ${{ env.PLAYWRIGHT_BROWSERS_PATH }}
          key: ${{ runner.os }}-playwright-${{ hashFiles('pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-playwright-

      - name: Install dependencies and prepare bubblewrap
        run: |
          pnpm install --frozen-lockfile &
          install_pid=$!
          bash scripts/prepare-ci-bubblewrap.sh &
          sandbox_pid=$!
          install_status=0
          wait "$install_pid" || install_status=$?
          sandbox_status=0
          wait "$sandbox_pid" || sandbox_status=$?
          if (( install_status != 0 )); then exit "$install_status"; fi
          exit "$sandbox_status"

      - name: Install Playwright Chromium and hosted dependencies
        if: vars.DSH_CI_FAILOVER_LINUX != 'selfhosted' || github.event.pull_request.user.login == 'dependabot[bot]'
        run: pnpm --filter @deepseek-ai/dsh-web-frontend exec playwright install --with-deps chromium

      # The persistent VM image owns Playwright's Linux system packages; do
      # not mutate the shared host with apt on every failover run.
      - name: Install Playwright Chromium on the failover VM
        if: vars.DSH_CI_FAILOVER_LINUX == 'selfhosted' && github.event.pull_request.user.login != 'dependabot[bot]'
        run: pnpm --filter @deepseek-ai/dsh-web-frontend exec playwright install chromium

      - name: Run compatibility, snapshot, and artifact gates
        run: pnpm run check:ci:consumers


  node-compat:
    if: github.event_name == 'pull_request'
    # Each compatibility contract receives an independent standard hosted job.
    runs-on: ${{ matrix.runner }}
    name: ${{ matrix.name }}
    env:
      DSH_GATE_CONCURRENCY: ${{ matrix.gate_concurrency }}
      DSH_NODE_COMPAT_SKIP_TYPECHECK: '1'
      # A failed smoke aborts the remaining compatibility gates instead of
      # letting the build-backed legs run against an already-red aggregate.
      DSH_GATE_FAIL_FAST: '1'
    strategy:
      fail-fast: false
      matrix:
        include:
          - node: '22.19'
            name: node 22.19
            runner: ubuntu-latest
            gate_concurrency: '1'
          # Pinned inside 24.0-24.11.1: those releases carry the v1 internal
          # loader while reporting major 24, and every other job tracks the
          # latest 24, which is v2. A bare `24` here would retest that same v2.
          - node: '24.9'
            name: node 24.9
            runner: ubuntu-latest
            gate_concurrency: '1'
          - node: 26
            name: node 26
            runner: ubuntu-latest
            gate_concurrency: '1'
    steps:
      - uses: actions/checkout@v6

      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-${{ github.run_id }}-${{ github.run_attempt }}

      - uses: actions/setup-node@v6
        with:
          node-version: ${{ matrix.node }}
          cache: pnpm

      - name: Install (immutable)
        run: pnpm install --frozen-lockfile

      - name: Run compatibility smokes
        env:
          DSH_BUILD_CLIENT_PROFILE: official
        run: pnpm run check:node-compat

      # Kept out of the gate aggregate: the shape a Node release carries only
      # changes with the Node version, so this belongs to the version matrix
      # rather than to every commit's checks.
      - name: Check Loader internal shape detection
        run: pnpm exec vitest run packages/boot/app-boot/tests/loader-shape.compat.spec.ts

  python-sdk:
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-latest
    name: python 3.10 / keyless SDK
    steps:
      - uses: actions/checkout@v6

      - uses: actions/setup-python@v6.3.0
        with:
          python-version: '3.10'
          cache: pip

      - name: Install uv
        run: python -m pip install uv==0.11.23

      - name: Run complete keyless Python suite
        run: uv run --python 3.10 --group test --project python/sdk pytest

  # The reusable builder owns each published executable, wheel, clean-install,
  # keyless black-box, and trusted real-API path. All native release targets are
  # required because a platform wheel cannot be validated by another carrier.
  python-runtime:
    if: github.event_name == 'pull_request'
    name: python runtime / release-shaped matrix
    uses: ./.github/workflows/build-exe-for-python-sdk.yml
    with:
      targets: node24-linux-x64,node24-linux-arm64,node24-macos-arm64,node24-macos-x64,node24-win-x64
      ci: true
    secrets:
      DEEPSEEK_API_KEY_EXTERNAL: ${{ secrets.DEEPSEEK_API_KEY_EXTERNAL }}

  # The required pull-request Windows signal: the two blocking win32 surfaces
  # (workspace build, production site) execute with real, checksum-verified
  # Windows Node under Wine on standard hosted Linux. The independent
  # windows-native job below keeps the complete native-kernel inventory —
  # including the observational portability gates this lane does not run —
  # on real Windows. This job only provisions runner state (caches,
  # apt); scripts/wine-windows-gates.sh owns the gate logic and is the same
  # script the optional local gate `pnpm run check:windows-wine` runs.
  # Current topology and fidelity limits live in
  # .agents/notes/implemented/process/2026-08-08-native-windows-pull-request-ci.md
  windows:
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-latest
    name: windows node 24 / wine blocking
    timeout-minutes: 15
    steps:
      - uses: actions/checkout@v6
        with:
          persist-credentials: false

      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-${{ github.run_id }}-${{ github.run_attempt }}

      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}

      - name: Configure pnpm store path
        id: pnpm-store
        run: |
          store_root="$HOME/.local/share/pnpm/store"
          echo "PNPM_CONFIG_STORE_DIR=$store_root" >> "$GITHUB_ENV"
          store_path=$(PNPM_CONFIG_STORE_DIR="$store_root" pnpm store path --silent)
          echo "path=$store_path" >> "$GITHUB_OUTPUT"

      - uses: actions/cache/restore@v4
        with:
          path: ${{ steps.pnpm-store.outputs.path }}
          key: ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-${{ hashFiles('pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-node-${{ env.PRIMARY_NODE_VERSION }}-pnpm-

      # Master's wine-apt-cache job in ci-master.yml seeds the default-branch
      # scope every pull request can read; a save from this job only reaches
      # reruns of the same merge ref.
      - name: Compose Wine apt cache key
        id: wine-cache-key
        run: echo "key=wine-debs-${ImageOS:-linux}-${ImageVersion:-v0}" >> "$GITHUB_OUTPUT"

      - uses: actions/cache@v4
        with:
          path: ~/wine-debs
          key: ${{ steps.wine-cache-key.outputs.key }}

      # Runner provisioning only — a developer machine installs Wine through
      # its own package manager; the gate script assumes a wine binary and
      # fails loud without one. Wine from the apt cache when present; else
      # download the full dependency closure once and keep it for the next
      # run. The `wine` dispatcher package (not bare `wine64`) is what puts a
      # binary on PATH.
      - name: Install Wine
        run: |
          if compgen -G "$HOME/wine-debs/*.deb" > /dev/null; then
            # The restored archive is the full --download-only closure of
            # `wine` for this runner image, so installing the .debs directly
            # with dpkg needs no repository access. apt-get would instead
            # re-download the same 100+ MB closure from the mirror, which has
            # stalled the job past its budget on a degraded runner network.
            # If the archive cannot satisfy the closure, fall back to the apt
            # network install.
            if ! sudo DEBIAN_FRONTEND=noninteractive dpkg -i "$HOME"/wine-debs/*.deb; then
              sudo DEBIAN_FRONTEND=noninteractive dpkg --configure -a || true
              sudo apt-get install -y --no-install-recommends "$HOME"/wine-debs/*.deb
            fi
          else
            sudo apt-get update
            sudo apt-get install -y --no-install-recommends --download-only wine
            mkdir -p "$HOME/wine-debs"
            cp /var/cache/apt/archives/*.deb "$HOME/wine-debs/" 2>/dev/null || true
            sudo apt-get install -y --no-install-recommends wine
          fi

      - name: Run the Wine Windows gates
        run: bash scripts/wine-windows-gates.sh

      - name: Shut down wineserver
        if: always()
        run: wineserver -k 2>/dev/null || true

  # Every pull request also gets real Windows-kernel signals. The former
  # monolithic windows-native job is split into smaller jobs so one slow
  # coverage gate does not hold up build/static results, while the total
  # per-job process count stays lower. Observational checks are non-blocking.
  # Dependabot PRs are excluded from the self-hosted pool and stay queued for
  # the hosted runner.
  windows-build:
    if: github.event_name == 'pull_request'
    runs-on: >-
      ${{ vars.DSH_CI_FAILOVER_WINDOWS == 'selfhosted'
          && github.event.pull_request.user.login != 'dependabot[bot]'
          && fromJSON('["self-hosted", "dsh-win-ci", "windows"]')
          || 'dsh-windows-2025-16core' }}
    name: windows node 24 / build
    timeout-minutes: 60
    env:
      # A failing build or site aborts the sibling gate on the same runner.
      DSH_GATE_FAIL_FAST: '1'
    steps:
      - uses: actions/checkout@v6
        with:
          persist-credentials: false
      - name: Enable Developer Mode (symlink support)
        shell: pwsh
        run: >-
          reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock"
          /t REG_DWORD /f /v "AllowDevelopmentWithoutDevLicense" /d "1"
      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}
      - name: Install (immutable)
        shell: pwsh
        # See 2026-08-30-windows-refs-store-block-clone-install for the
        # ReFS block-clone rationale; detect the workspace filesystem and
        # pass --package-import-method=clone only on ReFS.
        run: >-
          $drive = (Split-Path -Qualifier $env:GITHUB_WORKSPACE).TrimEnd(':');
          $fs = (Get-Volume -DriveLetter $drive).FileSystem;
          if ($fs -eq 'ReFS') {
            corepack pnpm install --frozen-lockfile --package-import-method=clone
          } else {
            pnpm install --frozen-lockfile
          }
      - name: Run blocking Windows builds
        shell: pwsh
        run: pnpm run check:ci:windows-blocking

  windows-coverage:
    if: github.event_name == 'pull_request'
    runs-on: >-
      ${{ vars.DSH_CI_FAILOVER_WINDOWS == 'selfhosted'
          && github.event.pull_request.user.login != 'dependabot[bot]'
          && fromJSON('["self-hosted", "dsh-win-ci", "windows"]')
          || 'dsh-windows-2025-16core' }}
    name: windows node 24 / coverage
    timeout-minutes: 120
    env:
      DSH_COVERAGE_MAX_WORKERS: '6'
      DSH_COVERAGE_PARTITIONS: '4'
      DSH_COVERAGE_TEST_TIMEOUT_MS: '90000'
      DSH_GATE_CONCURRENCY: '3'
      # A gate failure aborts the sibling gate instead of waiting out its
      # multi-minute instrumented run.
      DSH_GATE_FAIL_FAST: '1'
    steps:
      - uses: actions/checkout@v6
        with:
          persist-credentials: false
      # Checkout removes the gitignored duration history, so restore it from
      # the GitHub cache before coverage and save the updated one afterwards.
      # The coordinator then weights partitions by measured durations on the
      # second run instead of degrading to a file-count split. GitHub cache
      # entries are immutable, so the save key is unique per run and the
      # restore matches the newest entry through the stable prefix.
      - name: Restore coverage duration history
        uses: actions/cache/restore@v4
        with:
          path: .coverage-times.json
          key: coverage-times-${{ github.run_id }}
          restore-keys: |
            coverage-times-
      - name: Enable Developer Mode (symlink support)
        shell: pwsh
        run: >-
          reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock"
          /t REG_DWORD /f /v "AllowDevelopmentWithoutDevLicense" /d "1"
      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}
      - name: Install (immutable)
        shell: pwsh
        # See 2026-08-30-windows-refs-store-block-clone-install for the
        # ReFS block-clone rationale; detect the workspace filesystem and
        # pass --package-import-method=clone only on ReFS.
        run: >-
          $drive = (Split-Path -Qualifier $env:GITHUB_WORKSPACE).TrimEnd(':');
          $fs = (Get-Volume -DriveLetter $drive).FileSystem;
          if ($fs -eq 'ReFS') {
            corepack pnpm install --frozen-lockfile --package-import-method=clone
          } else {
            pnpm install --frozen-lockfile
          }
      # No build before coverage, matching the Linux lane: workspace imports
      # resolve to src through the tsconfig paths map, and the lib-consuming
      # suites (webworker-packer image-loadable, webworker-runtime
      # transform-corpus, client ui-trajectory client-bundle) self-skip on
      # unbuilt checkouts.
      - name: Run Windows coverage
        shell: pwsh
        run: pnpm run check:ci:coverage
      - name: Save coverage duration history
        # Coverage flakes must not prevent the cache from building; the
        # measured durations remain useful even when a partition failed. The
        # per-run key keeps every save a fresh immutable cache entry.
        if: always()
        uses: actions/cache/save@v4
        with:
          path: .coverage-times.json
          key: coverage-times-${{ github.run_id }}

  windows-native-tests:
    if: github.event_name == 'pull_request'
    runs-on: >-
      ${{ vars.DSH_CI_FAILOVER_WINDOWS == 'selfhosted'
          && github.event.pull_request.user.login != 'dependabot[bot]'
          && fromJSON('["self-hosted", "dsh-win-ci", "windows"]')
          || 'dsh-windows-2025-16core' }}
    name: windows node 24 / native tests
    timeout-minutes: 60
    steps:
      - uses: actions/checkout@v6
        with:
          persist-credentials: false
      - name: Enable Developer Mode (symlink support)
        shell: pwsh
        run: >-
          reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock"
          /t REG_DWORD /f /v "AllowDevelopmentWithoutDevLicense" /d "1"
      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}
      - name: Install (immutable)
        shell: pwsh
        # See 2026-08-30-windows-refs-store-block-clone-install for the
        # ReFS block-clone rationale; detect the workspace filesystem and
        # pass --package-import-method=clone only on ReFS.
        run: >-
          $drive = (Split-Path -Qualifier $env:GITHUB_WORKSPACE).TrimEnd(':');
          $fs = (Get-Volume -DriveLetter $drive).FileSystem;
          if ($fs -eq 'ReFS') {
            corepack pnpm install --frozen-lockfile --package-import-method=clone
          } else {
            pnpm install --frozen-lockfile
          }
      - name: Run Windows-specific native tests
        shell: pwsh
        run: >-
          pnpm exec vitest run
          --no-file-parallelism
          --testTimeout 90000
          packages/shell/tool-pwsh/tests/loader.spec.ts
          packages/workflow/workflow-worker-thread/tests/workflow-worker-thread.spec.ts
          packages/workflow/tool-ralph/tests/integration.spec.ts
          packages/subprocess/subprocess-local/tests/process-exit.spec.ts

  windows-observational:
    if: github.event_name == 'pull_request'
    continue-on-error: true
    runs-on: >-
      ${{ vars.DSH_CI_FAILOVER_WINDOWS == 'selfhosted'
          && github.event.pull_request.user.login != 'dependabot[bot]'
          && fromJSON('["self-hosted", "dsh-win-ci", "windows"]')
          || 'dsh-windows-2025-16core' }}
    name: windows node 24 / observational
    timeout-minutes: 60
    env:
      DSH_PUBLINT_CONCURRENCY: '8'
    steps:
      - uses: actions/checkout@v6
        with:
          persist-credentials: false
      - name: Enable Developer Mode (symlink support)
        shell: pwsh
        run: >-
          reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock"
          /t REG_DWORD /f /v "AllowDevelopmentWithoutDevLicense" /d "1"
      - uses: pnpm/action-setup@v4
        with:
          dest: ${{ runner.temp }}/setup-pnpm-js-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}
      - uses: actions/setup-node@v6
        with:
          node-version: ${{ env.PRIMARY_NODE_VERSION }}
      - name: Install (immutable)
        shell: pwsh
        # See 2026-08-30-windows-refs-store-block-clone-install for the
        # ReFS block-clone rationale; detect the workspace filesystem and
        # pass --package-import-method=clone only on ReFS.
        run: >-
          $drive = (Split-Path -Qualifier $env:GITHUB_WORKSPACE).TrimEnd(':');
          $fs = (Get-Volume -DriveLetter $drive).FileSystem;
          if ($fs -eq 'ReFS') {
            corepack pnpm install --frozen-lockfile --package-import-method=clone
          } else {
            pnpm install --frozen-lockfile
          }
      - name: Run Windows observational gates
        shell: pwsh
        run: pnpm run check:ci:windows-observational

  # Single stable required check for branch protection: require "all checks
  # passed" instead of enumerating matrix legs whose names change as lanes and
  # node versions evolve. Every blocking job in THIS workflow must be listed in
  # `needs`. The required Wine job is listed as `windows`; `windows-native` is
  # deliberately absent so its independent result never delays or changes this
  # verdict. (`needs` cannot reach across workflow files; the master-only jobs in
  # ci-master.yml are intentionally not part of this PR verdict.)
  # `if: always()` is load-bearing: without it a failed dependency
  # would SKIP this job, and GitHub counts a skipped required check as passing
  # — so this job always runs and fails on any non-success result, including
  # 'cancelled' and 'skipped'.
  all-checks-passed:
    name: all checks passed
    # This bookkeeping-only verdict must not depend on custom-pool
    # provisioning — and under Linux failover it follows the same selector as
    # the worker jobs it aggregates, so a standard-hosted outage cannot strand
    # the branch-protection verdict either. It retargets with the Linux switch
    # (DSH_CI_FAILOVER_LINUX), not the Windows one, because it aggregates the
    # required Linux workers and runs on the vm-backup pool.
    runs-on: >-
      ${{ vars.DSH_CI_FAILOVER_LINUX == 'selfhosted'
          && github.event.pull_request.user.login != 'dependabot[bot]'
          && fromJSON('["self-hosted", "linux", "x64", "vm-backup"]')
          || 'ubuntu-latest' }}
    needs: [node-24, node-24-coverage, node-24-bench, node-24-consumers, node-compat, python-sdk, python-runtime, windows, windows-build, windows-native-tests]
    if: always() && github.event_name == 'pull_request'
    steps:
      - name: Fail if any needed job did not succeed
        if: contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') || contains(needs.*.result, 'skipped')
        run: |
          echo "::error::Needed job results: ${{ join(needs.*.result, ', ') }}"
          exit 1
      - name: All checks passed
        run: echo "All needed jobs succeeded (${{ join(needs.*.result, ', ') }})"