PaperClipAI/.github/workflows/pr-trusted.yml

name: Trusted PR CI

# Rollout is intentionally two-step: merge this reusable workflow first, then
# replace pr.yml with an immutable-SHA caller so the active CI definition cannot
# drift from this file.
on:
  workflow_call:

permissions:
  actions: read
  contents: read
  pull-requests: read

concurrency:
  group: pr-${{ github.event.pull_request.number }}
  cancel-in-progress: true

jobs:
  gate:
    name: Select trusted runner
    runs-on: ubuntu-latest
    timeout-minutes: 5
    outputs:
      runner: ${{ steps.route.outputs.runner }}
      full_ci: ${{ steps.scope.outputs.full_ci }}

    steps:
      - name: Validate PR identity and select runner
        id: route
        shell: bash
        env:
          GH_TOKEN: ${{ github.token }}
          AWS_CI_ENABLED: ${{ vars.AWS_CI_ENABLED }}
          TRUSTED_USER_IDS: ${{ vars.AWS_CI_TRUSTED_USER_IDS }}
          EVENT_NAME: ${{ github.event_name }}
          EVENT_REPOSITORY: ${{ github.repository }}
          EVENT_REPOSITORY_ID: ${{ github.repository_id }}
          EVENT_ACTION: ${{ github.event.action }}
          EVENT_PR_NUMBER: ${{ github.event.pull_request.number }}
          EVENT_PR_AUTHOR_ID: ${{ github.event.pull_request.user.id }}
          EVENT_SENDER_ID: ${{ github.event.sender.id }}
          EVENT_BASE_REPOSITORY_ID: ${{ github.event.pull_request.base.repo.id }}
          EVENT_BASE_REF: ${{ github.event.pull_request.base.ref }}
          EVENT_BASE_SHA: ${{ github.event.pull_request.base.sha }}
          EVENT_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
          EVENT_MERGE_SHA: ${{ github.sha }}
          RUN_ID: ${{ github.run_id }}
        run: |
          set -u

          github_runner='ubuntu-latest'
          aws_runner='runs-on/fleet=paperclip-public-pr-x64/env=public-ci'

          fail_closed() {
            echo "runner=$github_runner" >> "$GITHUB_OUTPUT"
            echo "::notice title=AWS CI routing::Using GitHub-hosted runner: $1"
            exit 0
          }

          is_positive_integer() {
            [[ "$1" =~ ^[1-9][0-9]*$ ]]
          }

          is_commit_sha() {
            [[ "$1" =~ ^[0-9a-f]{40}$ ]]
          }

          is_allowed() {
            local user_id="$1"
            jq -e --argjson user_id "$user_id" 'index($user_id) != null' \
              <<< "$TRUSTED_USER_IDS" >/dev/null
          }

          [[ "$AWS_CI_ENABLED" == 'true' ]] || fail_closed 'AWS_CI_ENABLED is not true'
          # Reusable workflows retain the caller's github context and event
          # payload, so a pull_request caller must still report pull_request.
          [[ "$EVENT_NAME" == 'pull_request' ]] || fail_closed 'event is not pull_request'
          [[ "$EVENT_REPOSITORY" == 'paperclipai/paperclip' ]] || fail_closed 'unexpected repository'
          [[ "$EVENT_REPOSITORY_ID" == '1170821064' ]] || fail_closed 'unexpected repository ID'
          [[ "$EVENT_BASE_REPOSITORY_ID" == '1170821064' ]] || fail_closed 'unexpected base repository ID'
          [[ -n "$EVENT_BASE_REF" ]] || fail_closed 'missing base branch'
          [[ "$EVENT_ACTION" =~ ^(opened|reopened|synchronize)$ ]] || fail_closed 'unsupported pull_request action'

          jq -e '
            type == "array" and
            length > 0 and
            all(.[]; type == "number" and . > 0 and floor == .)
          ' <<< "$TRUSTED_USER_IDS" >/dev/null 2>&1 || fail_closed 'trusted user ID list is malformed'

          for user_id in "$EVENT_PR_AUTHOR_ID" "$EVENT_SENDER_ID"; do
            is_positive_integer "$user_id" || fail_closed 'event contains a malformed user ID'
            is_allowed "$user_id" || fail_closed "GitHub user ID $user_id is not allowlisted"
          done

          for commit_sha in "$EVENT_BASE_SHA" "$EVENT_HEAD_SHA" "$EVENT_MERGE_SHA"; do
            is_commit_sha "$commit_sha" || fail_closed 'event contains a malformed commit SHA'
          done

          pr_json="$(gh api \
            -H 'Accept: application/vnd.github+json' \
            -H 'X-GitHub-Api-Version: 2022-11-28' \
            "/repos/paperclipai/paperclip/pulls/$EVENT_PR_NUMBER" 2>/dev/null)" \
            || fail_closed 'could not refresh pull request state'

          jq -e \
            --argjson repository_id 1170821064 \
            --argjson author_id "$EVENT_PR_AUTHOR_ID" \
            --arg base_ref "$EVENT_BASE_REF" \
            --arg head_sha "$EVENT_HEAD_SHA" \
            '
              .state == "open" and
              .user.id == $author_id and
              .base.repo.id == $repository_id and
              .base.ref == $base_ref and
              .head.sha == $head_sha
            ' <<< "$pr_json" >/dev/null 2>&1 \
            || fail_closed 'current pull request state does not match the triggering event'

          live_merge_sha="$(jq -r '.merge_commit_sha // empty' <<< "$pr_json")"
          is_commit_sha "$live_merge_sha" || fail_closed 'current pull request has no valid merge SHA'

          base_ref_json="$(gh api \
            -H 'Accept: application/vnd.github+json' \
            -H 'X-GitHub-Api-Version: 2022-11-28' \
            "/repos/paperclipai/paperclip/git/ref/heads/$EVENT_BASE_REF" 2>/dev/null)" \
            || fail_closed 'could not inspect the current base branch'
          live_base_ref_sha="$(jq -r '.object.sha // empty' <<< "$base_ref_json")"
          is_commit_sha "$live_base_ref_sha" || fail_closed 'current base branch has no valid commit SHA'

          base_comparison="$(gh api \
            -H 'Accept: application/vnd.github+json' \
            -H 'X-GitHub-Api-Version: 2022-11-28' \
            "/repos/paperclipai/paperclip/compare/$EVENT_BASE_SHA...$live_base_ref_sha" 2>/dev/null)" \
            || fail_closed 'could not compare the triggering and current base branches'
          jq -e \
            --arg event_base_sha "$EVENT_BASE_SHA" '
              .merge_base_commit.sha == $event_base_sha and
              (.status == "ahead" or .status == "identical")
            ' <<< "$base_comparison" >/dev/null 2>&1 \
            || fail_closed 'current base branch does not descend from the triggering base snapshot'

          event_merge_json="$(gh api \
            -H 'Accept: application/vnd.github+json' \
            -H 'X-GitHub-Api-Version: 2022-11-28' \
            "/repos/paperclipai/paperclip/git/commits/$EVENT_MERGE_SHA" 2>/dev/null)" \
            || fail_closed 'could not inspect the event merge commit'

          live_merge_json="$(gh api \
            -H 'Accept: application/vnd.github+json' \
            -H 'X-GitHub-Api-Version: 2022-11-28' \
            "/repos/paperclipai/paperclip/git/commits/$live_merge_sha" 2>/dev/null)" \
            || fail_closed 'could not inspect the current merge commit'

          validate_merge_commit() {
            local merge_json="$1"
            local expected_sha="$2"
            jq -e \
              --arg expected_sha "$expected_sha" \
              --arg head_sha "$EVENT_HEAD_SHA" '
                .sha == $expected_sha and
                (.parents | length) == 2 and
                .parents[1].sha == $head_sha and
                (.parents[0].sha | test("^[0-9a-f]{40}$")) and
                (.tree.sha | test("^[0-9a-f]{40}$"))
              ' <<< "$merge_json" >/dev/null 2>&1
          }

          validate_merge_commit "$event_merge_json" "$EVENT_MERGE_SHA" \
            || fail_closed 'event merge commit does not match the current base and head'
          validate_merge_commit "$live_merge_json" "$live_merge_sha" \
            || fail_closed 'current merge commit does not match the triggering base and head'

          event_merge_parent="$(jq -r '.parents[0].sha' <<< "$event_merge_json")"
          live_merge_parent="$(jq -r '.parents[0].sha' <<< "$live_merge_json")"
          [[ "$event_merge_parent" == "$live_merge_parent" ]] \
            || fail_closed 'current merge commit uses a different base merge parent'

          if [[ "$event_merge_parent" != "$live_base_ref_sha" ]]; then
            base_merge_json="$(gh api \
              -H 'Accept: application/vnd.github+json' \
              -H 'X-GitHub-Api-Version: 2022-11-28' \
              "/repos/paperclipai/paperclip/git/commits/$event_merge_parent" 2>/dev/null)" \
              || fail_closed 'could not inspect the stacked base merge commit'
            jq -e \
              --arg expected_sha "$event_merge_parent" \
              --arg live_base_ref_sha "$live_base_ref_sha" '
                .sha == $expected_sha and
                (.parents | length) == 2 and
                any(.parents[]; .sha == $live_base_ref_sha) and
                (.tree.sha | test("^[0-9a-f]{40}$"))
              ' <<< "$base_merge_json" >/dev/null 2>&1 \
              || fail_closed 'stacked base merge commit does not contain the current base branch'
          fi

          event_merge_tree="$(jq -r '.tree.sha' <<< "$event_merge_json")"
          live_merge_tree="$(jq -r '.tree.sha' <<< "$live_merge_json")"
          [[ "$event_merge_tree" == "$live_merge_tree" ]] \
            || fail_closed 'current merge tree differs from the triggering merge tree'

          run_json="$(gh api \
            -H 'Accept: application/vnd.github+json' \
            -H 'X-GitHub-Api-Version: 2022-11-28' \
            "/repos/paperclipai/paperclip/actions/runs/$RUN_ID" 2>/dev/null)" \
            || fail_closed 'could not refresh workflow run state'

          triggering_actor_id="$(jq -r '.triggering_actor.id // empty' <<< "$run_json")"
          is_positive_integer "$triggering_actor_id" || fail_closed 'workflow run has no valid triggering actor ID'
          is_allowed "$triggering_actor_id" || fail_closed "triggering GitHub user ID $triggering_actor_id is not allowlisted"

          jq -e \
            --argjson repository_id 1170821064 \
            --arg event_name "$EVENT_NAME" '
              .repository.id == $repository_id and
              .event == $event_name
            ' <<< "$run_json" >/dev/null 2>&1 \
            || fail_closed 'current workflow run does not match the expected repository event'

          echo "runner=$aws_runner" >> "$GITHUB_OUTPUT"
          echo '::notice title=AWS CI routing::Using an ephemeral RunsOn Fleet runner'

      - name: Select stacked PR CI scope
        id: scope
        shell: bash
        env:
          STACK_JSON: ${{ toJSON(github.event.pull_request.stack) }}
          PR_BASE_REF: ${{ github.event.pull_request.base.ref }}
        run: |
          set -euo pipefail

          full_ci='true'
          reason='ordinary pull request'

          if jq -e 'type == "object"' <<< "$STACK_JSON" >/dev/null 2>&1; then
            stack_position="$(jq -r '.position // empty' <<< "$STACK_JSON")"
            stack_size="$(jq -r '.size // empty' <<< "$STACK_JSON")"
            stack_base_ref="$(jq -r '.base.ref // empty' <<< "$STACK_JSON")"

            if [[ ! "$stack_position" =~ ^[1-9][0-9]*$ ]] ||
               [[ ! "$stack_size" =~ ^[1-9][0-9]*$ ]] ||
               (( stack_position > stack_size )) ||
               [[ -z "$stack_base_ref" ]]; then
              reason='malformed stack metadata; defaulting to full CI'
            elif (( stack_position == stack_size )); then
              reason='top pull request in stack'
            elif [[ "$stack_base_ref" == "$PR_BASE_REF" ]]; then
              reason='lowest unmerged pull request in stack'
            else
              full_ci='false'
              reason='middle pull request in stack'
            fi
          fi

          echo "full_ci=$full_ci" >> "$GITHUB_OUTPUT"
          echo "::notice title=Stacked PR CI scope::$reason; full_ci=$full_ci"

  policy:
    needs: [gate]
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 10
    outputs:
      lockfile_regenerated: ${{ steps.regen_lockfile.outputs.regenerated }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false
          fetch-depth: 0

      - name: Block manual lockfile edits
        if: >-
          github.head_ref != 'chore/refresh-lockfile' &&
          github.event.pull_request.user.login != 'dependabot[bot]'
        run: |
          # Diff the PR branch against its merge base so recent base-branch commits
          # do not masquerade as changes made by the PR itself.
          changed="$(git diff --name-only "${{ github.event.pull_request.base.sha }}...${{ github.event.pull_request.head.sha }}")"
          if printf '%s\n' "$changed" | grep -qx 'pnpm-lock.yaml'; then
            echo "Do not commit pnpm-lock.yaml in pull requests. CI owns lockfile updates."
            exit 1
          fi

      - name: Setup pnpm
        uses: pnpm/action-setup@0977fd99725f1db4007ccb2928dbb4e90d06cc86 # v6
        env:
          NPM_CONFIG_AUDIT: "false"
          NPM_CONFIG_FUND: "false"
          NPM_CONFIG_UPDATE_NOTIFIER: "false"
        with:
          version: 9.15.4
          run_install: false

      - name: Setup Node.js
        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
        with:
          node-version: 24
          cache: pnpm

      - name: Validate migration ordering against target branch
        run: >-
          node .github/scripts/check-pr-migration-order.mjs
          "${{ github.event.pull_request.base.sha }}"
          "${{ github.event.pull_request.head.sha }}"

      - name: Validate Dockerfile deps stage
        run: node ./scripts/check-docker-deps-stage.mjs

      - name: Validate Node version policy
        run: pnpm check:node-version

      - name: Reject git push in adapter/runtime code
        run: node ./scripts/check-no-git-push.mjs

      - name: Test no-git-push check
        run: node --test ./scripts/check-no-git-push.test.mjs
      - name: Test PR quality-gate scripts
        run: node --test '.github/scripts/tests/*.test.mjs'

      - name: Test general-server shard partition
        run: node --test ./scripts/__tests__/run-vitest-stable-shard.test.mjs

      - name: Test e2e shard partition
        run: node --test ./scripts/__tests__/e2e-shard.test.mjs

      - name: Test release verify workflow wiring
        run: node --test ./scripts/__tests__/release-verify-workflow.test.mjs

      - name: Test standalone package build concurrency
        run: node --test ./scripts/__tests__/build-standalone-concurrency.test.mjs

      - name: Validate release package manifest
        run: node ./scripts/release-package-map.mjs check

      - name: Verify release package bootstrap for changed manifests
        run: |
          mapfile -t changed_paths < <(git diff --name-only "${{ github.event.pull_request.base.sha }}...${{ github.event.pull_request.head.sha }}")
          PAPERCLIP_RELEASE_BOOTSTRAP_BASE_SHA="${{ github.event.pull_request.base.sha }}" \
            node ./scripts/check-release-package-bootstrap.mjs "${changed_paths[@]}"

      - name: Validate dependency resolution and regenerate stale lockfile
        id: regen_lockfile
        run: |
          cp pnpm-lock.yaml "$RUNNER_TEMP/pnpm-lock.before.yaml"
          pnpm install --ignore-scripts --no-frozen-lockfile
          if cmp -s "$RUNNER_TEMP/pnpm-lock.before.yaml" pnpm-lock.yaml; then
            echo "regenerated=0" >> "$GITHUB_OUTPUT"
          else
            echo "regenerated=1" >> "$GITHUB_OUTPUT"
          fi

      # Manifest-only and stacked PRs keep pnpm-lock.yaml at the default branch.
      # Upload a regenerated copy whenever the checked-out merge tree needs one.
      # Every downstream job then consumes the same hash without recomputing.
      - name: Upload regenerated lockfile for downstream jobs
        if: steps.regen_lockfile.outputs.regenerated == '1'
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
        with:
          name: pr-lockfile
          path: pnpm-lock.yaml
          retention-days: 1
          if-no-files-found: error

  typecheck_release_registry:
    name: Typecheck + Release Registry
    needs: [gate, policy]
    if: ${{ needs.gate.outputs.full_ci == 'true' }}
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 20

    steps:
      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false

      - name: Setup pnpm
        uses: pnpm/action-setup@0977fd99725f1db4007ccb2928dbb4e90d06cc86 # v6
        env:
          NPM_CONFIG_AUDIT: "false"
          NPM_CONFIG_FUND: "false"
          NPM_CONFIG_UPDATE_NOTIFIER: "false"
        with:
          version: 9.15.4

      - name: Restore regenerated PR lockfile (if policy uploaded one)
        if: needs.policy.outputs.lockfile_regenerated == '1'
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: pr-lockfile
          path: .

      - name: Setup Node.js
        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
        with:
          node-version: 24
          cache: pnpm

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Typecheck workspaces whose build scripts skip TypeScript
        run: pnpm run typecheck:build-gaps

      - name: Verify release registry test coverage
        run: pnpm run test:release-registry

  general_tests:
    name: General tests (${{ matrix.group_label }})
    needs: [gate, policy]
    if: ${{ needs.gate.outputs.full_ci == 'true' }}
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 20
    strategy:
      fail-fast: false
      matrix:
        include:
          # The server suite is pinned to maxWorkers=1 (server/vitest.config.ts),
          # so it can only be parallelized across runners. Shard it to keep this
          # lane off the PR critical path. Five shards because the suite has
          # grown to ~946s of serial vitest wall time (run 30930345729,
          # 2026-08-04): at four shards the worst shard ran 311s and was the
          # slowest check in the whole PR run; five brings each shard to ~196s
          # of suite time (~240s job), level with the other ~250-300s lanes.
          - group: general-server
            group_label: server (1/5)
            shard_index: 0
            shard_count: 5
          - group: general-server
            group_label: server (2/5)
            shard_index: 1
            shard_count: 5
          - group: general-server
            group_label: server (3/5)
            shard_index: 2
            shard_count: 5
          - group: general-server
            group_label: server (4/5)
            shard_index: 3
            shard_count: 5
          - group: general-server
            group_label: server (5/5)
            shard_index: 4
            shard_count: 5
          # workspaces-a was the slowest check in the fully-green PR run
          # 31371439296 (2026-08-10) at 319s, with the ui project's single
          # vitest invocation accounting for ~224s and the paperclipai CLI
          # ~37s. Two shards use Vitest's native --shard on each project's
          # file list (ui: 439 files, cli: 54), bringing each job to roughly
          # half the suite time (~130s + setup) without a duration manifest.
          - group: general-workspaces-a
            group_label: workspaces-a (1/2)
            shard_index: 0
            shard_count: 2
          - group: general-workspaces-a
            group_label: workspaces-a (2/2)
            shard_index: 1
            shard_count: 2
          - group: general-workspaces-b
            group_label: workspaces-b

    steps:
      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false

      - name: Setup pnpm
        uses: pnpm/action-setup@0977fd99725f1db4007ccb2928dbb4e90d06cc86 # v6
        env:
          NPM_CONFIG_AUDIT: "false"
          NPM_CONFIG_FUND: "false"
          NPM_CONFIG_UPDATE_NOTIFIER: "false"
        with:
          version: 9.15.4

      - name: Restore regenerated PR lockfile (if policy uploaded one)
        if: needs.policy.outputs.lockfile_regenerated == '1'
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: pr-lockfile
          path: .

      - name: Setup Node.js
        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
        with:
          node-version: 24
          cache: pnpm

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Run grouped general test suites
        run: |
          if [ -n "${{ matrix.shard_count }}" ]; then
            pnpm test:run:general -- --group '${{ matrix.group }}' \
              --shard-index ${{ matrix.shard_index }} --shard-count ${{ matrix.shard_count }}
          else
            pnpm test:run:general -- --group '${{ matrix.group }}'
          fi

  verify:
    # Preserve the legacy required-check name while the underlying work runs in parallel.
    name: verify
    if: ${{ always() }}
    needs: [gate, policy, typecheck_release_registry, general_tests, build]
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 5

    steps:
      - name: Fail if any split verify lane failed
        env:
          FULL_CI: ${{ needs.gate.outputs.full_ci }}
          POLICY_RESULT: ${{ needs.policy.result }}
          TYPECHECK_RELEASE_REGISTRY_RESULT: ${{ needs.typecheck_release_registry.result }}
          GENERAL_TESTS_RESULT: ${{ needs.general_tests.result }}
          BUILD_RESULT: ${{ needs.build.result }}
        run: |
          test "$POLICY_RESULT" = "success"
          case "$FULL_CI" in
            true)
              test "$TYPECHECK_RELEASE_REGISTRY_RESULT" = "success"
              test "$GENERAL_TESTS_RESULT" = "success"
              test "$BUILD_RESULT" = "success"
              ;;
            false)
              test "$TYPECHECK_RELEASE_REGISTRY_RESULT" = "skipped"
              test "$GENERAL_TESTS_RESULT" = "skipped"
              test "$BUILD_RESULT" = "skipped"
              ;;
            *)
              echo "Invalid full_ci decision: $FULL_CI" >&2
              exit 1
              ;;
          esac

  build:
    name: Build
    needs: [gate, policy]
    if: ${{ needs.gate.outputs.full_ci == 'true' }}
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 20

    steps:
      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false

      - name: Setup pnpm
        uses: pnpm/action-setup@0977fd99725f1db4007ccb2928dbb4e90d06cc86 # v6
        env:
          NPM_CONFIG_AUDIT: "false"
          NPM_CONFIG_FUND: "false"
          NPM_CONFIG_UPDATE_NOTIFIER: "false"
        with:
          version: 9.15.4

      - name: Restore regenerated PR lockfile (if policy uploaded one)
        if: needs.policy.outputs.lockfile_regenerated == '1'
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: pr-lockfile
          path: .

      - name: Setup Node.js
        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
        with:
          node-version: 24
          cache: pnpm

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Verify Paperclip Runner
        run: pnpm --filter @paperclipai/paperclip-runner check:all

      - name: Build
        run: pnpm build

  verify_serialized_server:
    name: Verify serialized server suites (${{ matrix.shard_label }})
    needs: [gate, policy]
    if: ${{ needs.gate.outputs.full_ci == 'true' }}
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 20
    strategy:
      fail-fast: false
      matrix:
        include:
          # A successful PR run on 2026-08-17 (32012408876) spent 291s in
          # serialized shard 1/5 while its siblings ran 170-201s: round-robin
          # clustered the heavy suites on one runner. Shards are now balanced
          # by recorded duration (scripts/serialized-shard-durations.json),
          # which levels the measured 968s suite total to about 194s per
          # runner before setup overhead.
          - shard_index: 0
            shard_count: 5
            shard_label: 1/5
          - shard_index: 1
            shard_count: 5
            shard_label: 2/5
          - shard_index: 2
            shard_count: 5
            shard_label: 3/5
          - shard_index: 3
            shard_count: 5
            shard_label: 4/5
          - shard_index: 4
            shard_count: 5
            shard_label: 5/5

    steps:
      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false

      - name: Setup pnpm
        uses: pnpm/action-setup@0977fd99725f1db4007ccb2928dbb4e90d06cc86 # v6
        env:
          NPM_CONFIG_AUDIT: "false"
          NPM_CONFIG_FUND: "false"
          NPM_CONFIG_UPDATE_NOTIFIER: "false"
        with:
          version: 9.15.4

      - name: Restore regenerated PR lockfile (if policy uploaded one)
        if: needs.policy.outputs.lockfile_regenerated == '1'
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: pr-lockfile
          path: .

      - name: Setup Node.js
        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
        with:
          node-version: 24
          cache: pnpm

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Run serialized server test shard
        run: pnpm test:run:serialized -- --shard-index ${{ matrix.shard_index }} --shard-count ${{ matrix.shard_count }}

  canary_dry_run:
    name: Canary Dry Run
    needs: [gate, policy]
    if: ${{ needs.gate.outputs.full_ci == 'true' }}
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 20

    steps:
      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false

      - name: Setup pnpm
        uses: pnpm/action-setup@0977fd99725f1db4007ccb2928dbb4e90d06cc86 # v6
        env:
          NPM_CONFIG_AUDIT: "false"
          NPM_CONFIG_FUND: "false"
          NPM_CONFIG_UPDATE_NOTIFIER: "false"
        with:
          version: 9.15.4

      - name: Restore regenerated PR lockfile (if policy uploaded one)
        if: needs.policy.outputs.lockfile_regenerated == '1'
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: pr-lockfile
          path: .

      - name: Setup Node.js
        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
        with:
          node-version: 24
          cache: pnpm

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      # `release.sh` always executes its Step 2/7 workspace build, even when
      # `--skip-verify` bypasses the initial verification gate. release.sh
      # also requires a clean working tree, so any in-place lockfile churn
      # from `pnpm install --frozen-lockfile` must be reverted first — unless
      # the policy job uploaded a regenerated lockfile (manifest-changing
      # PRs), in which case we stage the artifact-restored copy into an
      # ephemeral local commit so release.sh sees a clean tree and its
      # workspace build sees a lockfile that matches the manifest.
      - name: Release canary dry run via release.sh internal build
        env:
          USED_ARTIFACT_LOCKFILE: ${{ needs.policy.outputs.lockfile_regenerated || '0' }}
        run: |
          git checkout -B master HEAD
          if [ "$USED_ARTIFACT_LOCKFILE" = "1" ]; then
            git add pnpm-lock.yaml
            if ! git diff --cached --quiet; then
              git -c user.email=ci@paperclip.local -c user.name=CI \
                commit --no-verify -m "ci(canary): stage regenerated lockfile"
            fi
          else
            git checkout -- pnpm-lock.yaml
          fi
          ./scripts/release.sh canary --skip-verify --dry-run

  e2e_shards:
    name: e2e shard (${{ matrix.shard_label }})
    needs: [gate, policy]
    if: ${{ needs.gate.outputs.full_ci == 'true' }}
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 30
    strategy:
      fail-fast: false
      matrix:
        include:
          # The Playwright lane is pinned to workers=1 (tests/e2e/playwright.config.ts)
          # because every spec shares one throwaway server and some toggle
          # instance-level flags, so it can only be parallelized across runners.
          # Each shard boots its own server, which keeps that isolation intact.
          # Three shards let the ~3min smoke-lab spec ride alone while the rest
          # of the catalog splits evenly, pulling this lane off the PR critical
          # path (it was the slowest check at ~8min20s with two shards).
          - shard_index: 0
            shard_count: 3
            shard_label: 1/3
          - shard_index: 1
            shard_count: 3
            shard_label: 2/3
          - shard_index: 2
            shard_count: 3
            shard_label: 3/3

    steps:
      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false

      - name: Setup pnpm
        uses: pnpm/action-setup@0977fd99725f1db4007ccb2928dbb4e90d06cc86 # v6
        env:
          NPM_CONFIG_AUDIT: "false"
          NPM_CONFIG_FUND: "false"
          NPM_CONFIG_UPDATE_NOTIFIER: "false"
        with:
          version: 9.15.4

      - name: Restore regenerated PR lockfile (if policy uploaded one)
        if: needs.policy.outputs.lockfile_regenerated == '1'
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: pr-lockfile
          path: .

      - name: Setup Node.js
        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7
        with:
          node-version: 24
          cache: pnpm

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Verify runner Chrome
        # GitHub's Ubuntu runner image already ships Google Chrome, so use that
        # directly for the headless e2e lane instead of downloading Playwright
        # browser bundles inside the 30 minute job budget.
        run: google-chrome --version

      - name: Generate Paperclip config
        run: |
          mkdir -p ~/.paperclip/instances/default
          cat > ~/.paperclip/instances/default/config.json << 'CONF'
          {
            "$meta": { "version": 1, "updatedAt": "2026-01-01T00:00:00.000Z", "source": "onboard" },
            "database": { "mode": "embedded-postgres" },
            "logging": { "mode": "file" },
            "server": { "deploymentMode": "local_trusted", "host": "127.0.0.1", "port": 3100 },
            "auth": { "baseUrlMode": "auto" },
            "storage": { "provider": "local_disk" },
            "secrets": { "provider": "local_encrypted", "strictMode": false }
          }
          CONF

      - name: Run e2e tests
        env:
          PAPERCLIP_E2E_SKIP_LLM: "true"
          PAPERCLIP_PLAYWRIGHT_CHANNEL: "chrome"
        run: |
          # Playwright's own --shard balances by test count, and one spec
          # (smoke-lab) is ~40% of the lane's wall clock. Partition by recorded
          # spec duration instead so both runners finish together.
          specs="$(node ./scripts/e2e-shard.mjs \
            --shard-index ${{ matrix.shard_index }} --shard-count ${{ matrix.shard_count }})"
          echo "shard ${{ matrix.shard_label }} specs: $specs"
          # specs is an intentional argument list.
          # shellcheck disable=SC2086
          pnpm run test:e2e $specs

      - name: Upload Playwright report
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
        if: always()
        with:
          name: playwright-report-${{ matrix.shard_index }}
          path: |
            tests/e2e/playwright-report/
            tests/e2e/test-results/
          retention-days: 14

  e2e:
    # Preserve the legacy required-check name while the specs run sharded
    # across the matrix above (same pattern as the `verify` aggregate).
    name: e2e
    if: ${{ always() }}
    needs: [gate, policy, e2e_shards]
    runs-on: ${{ needs.gate.outputs.runner }}
    timeout-minutes: 5

    steps:
      - name: Fail if any e2e shard failed
        env:
          FULL_CI: ${{ needs.gate.outputs.full_ci }}
          POLICY_RESULT: ${{ needs.policy.result }}
          E2E_SHARDS_RESULT: ${{ needs.e2e_shards.result }}
        run: |
          test "$POLICY_RESULT" = "success"
          case "$FULL_CI" in
            true) test "$E2E_SHARDS_RESULT" = "success" ;;
            false) test "$E2E_SHARDS_RESULT" = "skipped" ;;
            *)
              echo "Invalid full_ci decision: $FULL_CI" >&2
              exit 1
              ;;
          esac