Reduce redundant CI runs, pnpm uploads, and fixture startups (#23145)

* Reduce redundant CI runs, store uploads, and fixture processes

* Avoid repeating draft-independent mobile checks on readiness

---------

Co-authored-by: m4air <m4air@m4airs-Air.localdomain>

.github/actions/install-node-dependencies/action.yml

@@ -50,8 +50,9 @@ runs:
       uses: actions/setup-node@v6
       with:
         node-version-file: package.json
-        cache: pnpm
+        cache: ${{ github.event_name != 'pull_request' && 'pnpm' || '' }}
         cache-dependency-path: ${{ inputs.cache-dependency-path }}
+        package-manager-cache: false
 
     - name: Setup requested Node.js
       id: requested-node
@@ -59,8 +60,31 @@ runs:
       uses: actions/setup-node@v6
       with:
         node-version: ${{ inputs.node-version }}
-        cache: pnpm
+        cache: ${{ github.event_name != 'pull_request' && 'pnpm' || '' }}
         cache-dependency-path: ${{ inputs.cache-dependency-path }}
+        package-manager-cache: false
+
+    # PR-local stores compete with reusable build caches for the repository quota.
+    - name: Resolve pnpm download store
+      id: pnpm-store
+      if: github.event_name == 'pull_request'
+      shell: bash
+      env:
+        LOCKFILE_HASH: ${{ hashFiles(inputs.cache-dependency-path) }}
+      run: |
+        test -n "$LOCKFILE_HASH"
+        cache_path="$(pnpm store path --silent)"
+        test -n "$cache_path"
+        printf 'path=%s\n' "$cache_path" >> "$GITHUB_OUTPUT"
+        printf 'arch=%s\n' "$(node -p 'require("node:os").arch()')" >> "$GITHUB_OUTPUT"
+
+    # Match setup-node's key and path so existing default-branch stores remain reusable.
+    - name: Restore pnpm download store without saving
+      if: github.event_name == 'pull_request'
+      uses: actions/cache/restore@v5
+      with:
+        path: ${{ steps.pnpm-store.outputs.path }}
+        key: node-cache-${{ runner.os }}-${{ steps.pnpm-store.outputs.arch }}-pnpm-${{ hashFiles(inputs.cache-dependency-path) }}
 
     - name: Validate native runtime
       shell: bash

.github/workflows/bun-profile-tests.yml

@@ -3,17 +3,17 @@ name: Bun profile persistence
 on:
   pull_request:
     paths:
-      - 'src/main/persistence/**'
-      - 'src/main/sqlite/**'
-      - 'src/main/worker-thread-entry-path.ts'
-      - 'src/main/orcad/**'
-      - 'src/main/daemon/pty-subprocess/**'
-      - 'src/main/providers/**'
-      - 'src/shared/**'
+      - 'src/**'
       - 'config/**'
+      - 'native/**'
+      - 'tests/**'
+      - 'resources/**'
       - 'package.json'
       - 'pnpm-lock.yaml'
       - 'pnpm-workspace.yaml'
+      - 'tsconfig.json'
+      - '.npmrc'
+      - '.pnpmfile.cjs'
       - '.github/actions/install-node-dependencies/**'
       - '.github/workflows/bun-profile-tests.yml'
   workflow_dispatch:
@@ -26,7 +26,33 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  changes:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    outputs:
+      should_run: ${{ steps.scope.outputs.should_run }}
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 2
+          persist-credentials: false
+      - uses: ./.github/actions/install-node-dependencies
+      - name: Detect Bun build and test inputs
+        id: scope
+        shell: bash
+        run: |
+          # Compare the tested merge with its base, retaining both sides of renames.
+          if git diff --name-only --no-renames -z HEAD^1 HEAD > "$RUNNER_TEMP/bun-changes"; then
+            node config/scripts/bun-profile-change-scope.mjs "$RUNNER_TEMP/bun-changes"
+          else
+            echo 'should_run=true' >> "$GITHUB_OUTPUT"
+          fi
+
   persistence:
+    needs: changes
+    # Missing/failed detection runs the full matrix; manual runs remain unconditional.
+    if: ${{ !cancelled() && needs.changes.outputs.should_run != 'false' }}
     strategy:
       fail-fast: false
       matrix:
@@ -56,6 +82,9 @@ jobs:
           node out/orcad/orcad.js --orcad-profile-state-preflight 00000000-0000-4000-8000-000000000018
 
   linux_glibc_floor:
+    needs: changes
+    # Missing/failed detection runs the full matrix; manual runs remain unconditional.
+    if: ${{ !cancelled() && needs.changes.outputs.should_run != 'false' }}
     strategy:
       fail-fast: false
       matrix:
@@ -78,6 +107,9 @@ jobs:
       - run: pnpm test:bun:profile --artifact
 
   linux_musl:
+    needs: changes
+    # Missing/failed detection runs the full matrix; manual runs remain unconditional.
+    if: ${{ !cancelled() && needs.changes.outputs.should_run != 'false' }}
     strategy:
       fail-fast: false
       matrix:

.github/workflows/mobile.yml

@@ -6,7 +6,6 @@ on:
       - opened
       - synchronize
       - reopened
-      - ready_for_review
     paths:
       - 'mobile/**'
       # Mobile launch contracts exercise the real host dispatcher and durable receipt store.

.github/workflows/pr-test-loc.yml

@@ -6,7 +6,6 @@ on:
       - opened
       - synchronize
       - reopened
-      - ready_for_review
 
 concurrency:
   group: pr-test-loc-${{ github.event.pull_request.number }}

.github/workflows/pr.yml

@@ -1,4 +1,5 @@
 name: PR Checks
+run-name: 'PR ${{ github.event.pull_request.number }} | source ${{ github.sha }} | workflow ${{ github.workflow_sha }}'
 
 on:
   pull_request:
@@ -27,23 +28,28 @@ jobs:
     # Reuse one lightweight checkout for detection and the always-required guards.
     runs-on: ubuntu-slim
     timeout-minutes: 5
+    permissions:
+      contents: read
+      actions: read
     outputs:
       should_run: ${{ steps.filter.outputs.should_run }}
-      native_cache_changed: ${{ steps.filter.outputs.native_cache_changed }}
+      reused_run_id: ${{ steps.readiness.outputs.run_id }}
+      # A proven success masks required work only; advisory routing still uses the full diff.
+      native_cache_changed: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.native_cache_changed }}
       mobile_dependencies: ${{ steps.filter.outputs.mobile_dependencies }}
-      mobile_web_app: ${{ steps.filter.outputs.mobile_web_app }}
-      static_analysis: ${{ steps.filter.outputs.static_analysis }}
-      typecheck: ${{ steps.filter.outputs.typecheck }}
-      git_compatibility: ${{ steps.filter.outputs.git_compatibility }}
-      codex_index_heal_contract: ${{ steps.filter.outputs.codex_index_heal_contract }}
-      xterm_patch_sync: ${{ steps.filter.outputs.xterm_patch_sync }}
-      shell_contracts: ${{ steps.filter.outputs.shell_contracts }}
-      test: ${{ steps.filter.outputs.test }}
-      orcad_browser: ${{ steps.filter.outputs.orcad_browser }}
-      cross-version-wire: ${{ steps.filter.outputs.cross-version-wire }}
-      managed_hook_node18: ${{ steps.filter.outputs.managed_hook_node18 }}
-      package: ${{ steps.filter.outputs.package }}
-      package_windows: ${{ steps.filter.outputs.package_windows }}
+      mobile_web_app: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.mobile_web_app }}
+      static_analysis: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.static_analysis }}
+      typecheck: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.typecheck }}
+      git_compatibility: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.git_compatibility }}
+      codex_index_heal_contract: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.codex_index_heal_contract }}
+      xterm_patch_sync: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.xterm_patch_sync }}
+      shell_contracts: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.shell_contracts }}
+      test: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.test }}
+      orcad_browser: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.orcad_browser }}
+      cross-version-wire: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.cross-version-wire }}
+      managed_hook_node18: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.managed_hook_node18 }}
+      package: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.package }}
+      package_windows: ${{ steps.readiness.outputs.reused != 'true' && steps.filter.outputs.package_windows }}
       e2e_should_run: ${{ steps.e2e_filter.outputs.should_run }}
       test_files: ${{ steps.e2e_filter.outputs.test_files }}
       ssh_source_changed: ${{ steps.e2e_filter.outputs.ssh_source_changed }}
@@ -66,6 +72,7 @@ jobs:
             /config/scripts/check-readme-local-links.mjs
             /config/scripts/pr-code-change-scope.mjs
             /config/scripts/pr-e2e-source-routing.mjs
+            /config/scripts/pr-ready-check-reuse.mjs
           sparse-checkout-cone-mode: false
           persist-credentials: false
 
@@ -79,6 +86,15 @@ jobs:
       - name: Check README local links
         run: node config/scripts/check-readme-local-links.mjs
 
+      # Readiness changes eligibility for advisory tests, not the already-tested source.
+      - name: Find identical successful required checks
+        id: readiness
+        if: github.event.action == 'ready_for_review'
+        env:
+          GH_TOKEN: ${{ github.token }}
+          PR_CHECK_WORKFLOW_SHA: ${{ github.workflow_sha }}
+        run: node config/scripts/pr-ready-check-reuse.mjs
+
       - name: Classify changed paths
         id: filter
         env: