steipete · Oct 25, 2026 · Oct 25, 2026 · Oct 25, 2026 · Oct 25, 2026 · Oct 25, 2026
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
@@ -16,6 +16,7 @@ env:
 
 jobs:
   autofix:
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') }}
     name: Format
     runs-on: ubuntu-latest
     concurrency:

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
@@ -13,6 +13,7 @@ env:
 
 jobs:
   lint-js:
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') }}
     name: "Lint JavaScript"
     runs-on: ubuntu-latest
     steps:

diff --git a/.github/workflows/openclaw-build-test.yml b/.github/workflows/openclaw-build-test.yml
@@ -35,7 +35,7 @@ concurrency:
 
 jobs:
   linux-x64:
-    if: github.repository == 'openclaw/bun'
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') && (github.repository == 'openclaw/bun') }}
     runs-on: blacksmith-16vcpu-ubuntu-2404
     timeout-minutes: 115
     env:
@@ -155,7 +155,7 @@ jobs:
           retention-days: 7
 
   darwin-arm64:
-    if: github.repository == 'openclaw/bun'
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') && (github.repository == 'openclaw/bun') }}
     runs-on: macos-15
     timeout-minutes: 115
     env:

diff --git a/.github/workflows/openclaw-release.yml b/.github/workflows/openclaw-release.yml
@@ -13,6 +13,18 @@ on:
       - scripts/openclaw-release/**
   workflow_dispatch:
     inputs:
+      diagnostic_hang:
+        description: "Capture original-release parked-worker native state (do not merge)"
+        type: boolean
+        default: false
+      diagnostic_comparison:
+        description: "Reuse S8/S7 binaries for parked-worker GC diagnostics (do not merge)"
+        type: boolean
+        default: false
+      diagnostic_release_controls:
+        description: "Compare the original signed S8/S7 release-run binaries (do not merge)"
+        type: boolean
+        default: false
       tag:
         description: "Release tag (openclaw-v…) to build; empty builds the dispatched ref as a dry run"
         type: string
@@ -39,6 +51,7 @@ env:
 
 jobs:
   plan:
+    if: inputs.diagnostic_comparison != true && inputs.diagnostic_release_controls != true && inputs.diagnostic_hang != true
     name: Plan
     runs-on: ubuntu-24.04
     timeout-minutes: 10
@@ -63,7 +76,7 @@ jobs:
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           path: source
-          ref: ${{ env.RELEASE_TAG && format('refs/tags/{0}', env.RELEASE_TAG) || github.sha }}
+          ref: ${{ env.RELEASE_TAG && format('refs/tags/{0}', env.RELEASE_TAG) || github.event.pull_request.head.sha || github.sha }}
           # History for the ancestry check against main; blobs are fetched on demand.
           fetch-depth: 0
           filter: blob:none
@@ -73,12 +86,13 @@ jobs:
         with:
           bun-version: "1.4.2"
       - name: Test pipeline
+        if: ${{ !startsWith(github.head_ref || github.ref_name, 'claude/diag-parked-worker-gc-') }}
         working-directory: pipeline
         run: bun test test/internal/source-lints/openclaw-release.test.ts
       - name: Plan
         id: plan
         env:
-          TARGETS: ${{ inputs.targets }}
+          TARGETS: ${{ startsWith(github.head_ref || github.ref_name, 'claude/diag-parked-worker-gc-') && 'windows-x64,windows-arm64' || inputs.targets }}
           WINDOWS_SIGNED: ${{ vars.OPENCLAW_RELEASE_WINDOWS_SIGNED }}
         run: |
           args=(--source source --main origin/main)
@@ -353,7 +367,7 @@ jobs:
   smoke:
     name: Smoke ${{ matrix.target }}
     needs: [plan, build, sign-macos, sign-windows, windows-test-only]
-    if: ${{ !cancelled() && needs.build.result == 'success' && needs.sign-macos.result != 'failure' && (needs.plan.outputs.windows != 'true' || (needs.plan.outputs.publish == 'true' && needs.sign-windows.result == 'success') || (needs.plan.outputs.publish != 'true' && needs.windows-test-only.result == 'success')) }}
+    if: ${{ !startsWith(github.head_ref || github.ref_name, 'claude/diag-parked-worker-gc-') && !cancelled() && needs.build.result == 'success' && needs.sign-macos.result != 'failure' && (needs.plan.outputs.windows != 'true' || (needs.plan.outputs.publish == 'true' && needs.sign-windows.result == 'success') || (needs.plan.outputs.publish != 'true' && needs.windows-test-only.result == 'success')) }}
     runs-on: ${{ matrix.runner }}
     timeout-minutes: 15
     strategy:
@@ -435,15 +449,20 @@ jobs:
           $arch = & $exe -p process.arch
           if ($LASTEXITCODE -ne 0 -or $arch -cne $env:EXPECTED_ARCH) { throw 'Unexpected runtime architecture.' }
           $env:PATH = "$(Split-Path $exe);$env:PATH"
-          & $exe ../pipeline/scripts/openclaw-ci/tests.ts select-windows
-          if ($LASTEXITCODE -ne 0) { throw 'Test selection failed.' }
-          & $exe ../pipeline/scripts/openclaw-ci/tests.ts test
-          if ($LASTEXITCODE -ne 0) { throw 'Windows compatibility tests failed.' }
+          New-Item -ItemType Directory -Force build/openclaw-ci/traces | Out-Null
+          $env:BUN_DIAG_GC_WAKE_DIR = (Resolve-Path build/openclaw-ci/traces).Path
+          & $exe --revision
+          & $exe -p 'process.versions.webkit'
+          git rev-parse HEAD
+          node scripts/runner.node.ts --exec-path $exe --vendor=false --retries=0 --results-json build/openclaw-ci/results.json --include js/node/worker_threads/worker_threads.test.ts
+          if ($LASTEXITCODE -ne 0) { throw 'Worker diagnostic failed.' }
       - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
         if: always()
         with:
           name: compatibility-${{ matrix.target }}
-          path: source/build/openclaw-ci/*.json
+          path: |
+            source/build/openclaw-ci/*.json
+            source/build/openclaw-ci/traces/*.log
           if-no-files-found: error
           retention-days: 14
 
@@ -544,3 +563,160 @@ jobs:
           flags=(--repo "$GITHUB_REPOSITORY" --verify-tag --title "$TAG" --notes-file release-notes.md --latest=false)
           [ "$PRERELEASE" = true ] && flags+=(--prerelease)
           gh release create "$TAG" "${flags[@]}" ./*.zip manifest.json SHA256SUMS
+
+  compare:
+    if: inputs.diagnostic_comparison == true || inputs.diagnostic_release_controls == true
+    permissions:
+      contents: read
+      actions: read
+    name: Compare S8 and S7 on ${{ matrix.arch }}
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 40
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: x64
+            runner: windows-2025
+            triplet: bun-windows-x64
+          - arch: arm64
+            runner: windows-11-arm
+            triplet: bun-windows-aarch64
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          path: pipeline
+          persist-credentials: false
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          path: s8
+          ref: ${{ inputs.diagnostic_release_controls && '6aba42d75d4bcee905087fa518cb2df6ff49bb0d' || 'a242c7f085316fb4c6c0a78c2e3a557e65a0c846' }}
+          persist-credentials: false
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          path: s7
+          ref: ${{ inputs.diagnostic_release_controls && '807211511f81e0a6639bc9eb41d67120f6b85316' || '4e3f28e9b2fb8abb296afd55a819b925b0a0c730' }}
+          persist-credentials: false
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+        with:
+          node-version: "26.12.1"
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: ${{ inputs.diagnostic_release_controls && 'signed-windows' || 'test-only-windows' }}
+          path: s8-dist
+          run-id: ${{ inputs.diagnostic_release_controls && 40153838318 || 40158095734 }}
+          github-token: ${{ github.token }}
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: ${{ inputs.diagnostic_release_controls && 'signed-windows' || 'test-only-windows' }}
+          path: s7-dist
+          run-id: ${{ inputs.diagnostic_release_controls && 40123710650 || 40158426381 }}
+          github-token: ${{ github.token }}
+      - name: Run unchanged full files and interleaved focused trials
+        shell: pwsh
+        env:
+          TRIPLET: ${{ matrix.triplet }}
+          EXPECTED_ARCH: ${{ matrix.arch }}
+          USE_RELEASE_CONTROLS: ${{ inputs.diagnostic_release_controls && '1' || '0' }}
+        run: |
+          Expand-Archive -LiteralPath "s8-dist/$env:TRIPLET.zip" -DestinationPath s8-runtime
+          Expand-Archive -LiteralPath "s7-dist/$env:TRIPLET.zip" -DestinationPath s7-runtime
+          $s8 = (Resolve-Path "s8-runtime/$env:TRIPLET/bun.exe").Path
+          $s7 = (Resolve-Path "s7-runtime/$env:TRIPLET/bun.exe").Path
+          node pipeline/scripts/openclaw-release/gc-wake-diagnostic.mjs evidence $s8 s8 $s7 s7
+          if ($LASTEXITCODE -ne 0) { throw 'Diagnostic failures are retained in the artifacts.' }
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        if: always()
+        with:
+          name: gc-wake-comparison-${{ matrix.arch }}
+          path: evidence/
+          if-no-files-found: error
+          retention-days: 14
+
+  diagnostic-hang:
+    name: Capture original ARM64 parked-worker state
+    if: github.event_name == 'workflow_dispatch' && inputs.diagnostic_hang == true
+    runs-on: windows-11-arm
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          path: pipeline
+          persist-credentials: false
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          path: s8
+          ref: 6aba42d75d4bcee905087fa518cb2df6ff49bb0d
+          persist-credentials: false
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          path: s7
+          ref: 807211511f81e0a6639bc9eb41d67120f6b85316
+          persist-credentials: false
+      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+        with:
+          node-version: "26.12.1"
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: signed-windows
+          path: s8-dist
+          run-id: 40153838318
+          github-token: ${{ github.token }}
+      - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: signed-windows
+          path: s7-dist
+          run-id: 40123710650
+          github-token: ${{ github.token }}
+      - name: Install signed native debugging tools
+        id: tools
+        shell: pwsh
+        run: ./pipeline/scripts/openclaw-release/gc-wake-hang-tools.ps1
+      - name: Capture unchanged focused test children
+        shell: pwsh
+        env:
+          DUMP_TOOL: ${{ steps.tools.outputs.procdump }}
+          DEBUGGER_TOOL: ${{ steps.tools.outputs.cdb }}
+        run: |
+          foreach ($variant in @('s8', 's7')) {
+            Expand-Archive -LiteralPath "$variant-dist/bun-windows-aarch64.zip" -DestinationPath "$variant-runtime"
+            Expand-Archive -LiteralPath "$variant-dist/bun-windows-aarch64-profile.zip" -DestinationPath "$variant-runtime"
+            foreach ($mode in @('normal', 'profile')) {
+              $directory = "$variant-runtime/bun-windows-aarch64"
+              $binary = 'bun.exe'
+              if ($mode -eq 'profile') { $directory += '-profile'; $binary = 'bun-profile.exe' }
+              $exe = (Resolve-Path "$directory/$binary").Path
+              node pipeline/scripts/openclaw-release/gc-wake-hang-probe.mjs $exe $variant "hang-evidence/$variant-$mode" $env:DUMP_TOOL $env:DEBUGGER_TOOL (Resolve-Path $directory).Path
+              if ($LASTEXITCODE -ne 0) { throw "Probe setup failed for $variant-$mode" }
+            }
+          }
+      - name: Inspect retained dumps with matching profile symbols
+        timeout-minutes: 8
+        shell: pwsh
+        run: |
+          $cdb = "${env:ProgramFiles(x86)}/Windows Kits/10/Debuggers/arm64/cdb.exe"
+          if (!(Test-Path $cdb)) {
+            Invoke-WebRequest 'https://go.microsoft.com/fwlink/?linkid=2342616' -OutFile hang-tools/winsdksetup.exe
+            if ((Get-AuthenticodeSignature hang-tools/winsdksetup.exe).Status -ne 'Valid') { throw 'SDK installer signature is invalid.' }
+            $setup = Start-Process hang-tools/winsdksetup.exe -ArgumentList '/quiet /norestart /features OptionId.WindowsDesktopDebuggers' -Wait -PassThru
+            if ($setup.ExitCode -notin @(0, 3010)) { throw "Debugger setup failed: $($setup.ExitCode)" }
+          }
+          if (!(Test-Path $cdb)) { throw 'Native cdb unavailable; raw dumps are retained.' }
+          foreach ($variant in @('s8', 's7')) {
+            foreach ($mode in @('normal', 'profile')) {
+              $symbols = "$variant-runtime/bun-windows-aarch64"
+              if ($mode -eq 'profile') { $symbols += '-profile' }
+              foreach ($dump in Get-ChildItem "hang-evidence/$variant-$mode" -Filter '*.dmp') {
+                & $cdb -z $dump.FullName -y (Resolve-Path $symbols).Path -c '.reload; lm; ~* kP; !runaway; q' *> "$($dump.DirectoryName)/offline-debugger.log"
+              }
+            }
+          }
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        if: always()
+        with:
+          name: gc-wake-arm64-hang-state
+          path: |
+            hang-evidence/
+            hang-tools/tools.json
+          if-no-files-found: error
+          retention-days: 14
diff --git a/.github/workflows/rust-lints.yml b/.github/workflows/rust-lints.yml
@@ -43,6 +43,7 @@ env:
 
 jobs:
   clippy:
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') }}
     name: cargo clippy
     runs-on: ubuntu-latest
     steps:
@@ -75,6 +76,7 @@ jobs:
         run: cargo check --workspace --all-targets --keep-going
 
   miri:
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') }}
     name: cargo miri test
     runs-on: ubuntu-latest
     steps:
@@ -97,6 +99,7 @@ jobs:
         run: bun run rust:miri
 
   lolhtml:
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') }}
     # The vendored lol-html is a fork (oven-sh/lol-html, `bun` branch) carrying
     # content-handler suspension, and its own test suite is the only thing that
     # guards the fork's invariants: nothing in the Bun test suite reaches, for
@@ -126,7 +129,7 @@ jobs:
   mordant:
     name: mordant
     runs-on: ubuntu-latest
-    if: github.event_name != 'merge_group'
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') && (github.event_name != 'merge_group') }}
     # Advisory while the pack is new: shows up on the PR, does not block it.
     continue-on-error: true
     env:

diff --git a/.github/workflows/source-lints.yml b/.github/workflows/source-lints.yml
@@ -65,6 +65,7 @@ env:
 
 jobs:
   source-lints:
+    if: ${{ !startsWith(github.head_ref, 'claude/diag-parked-worker-gc-') }}
     name: "Source lints"
     runs-on: ubuntu-latest
     timeout-minutes: 10

diff --git a/packages/bun-usockets/src/eventing/libuv.c b/packages/bun-usockets/src/eventing/libuv.c
@@ -22,6 +22,8 @@
 
 #ifdef LIBUS_USE_LIBUV
 
+extern void Bun__traceGCWake(const char *event, const void *owner, const void *object, double detail);
+
 /* Windows does not reliably latch a received RST in SO_ERROR (POSIX does);
  * the reset surfaces on the next I/O. A zero-byte send observes it without
  * touching the stream: 0 on a healthy socket, SOCKET_ERROR with a fatal
@@ -156,6 +158,7 @@ static void timer_cb(uv_timer_t *t) {
 
 static void async_cb(uv_async_t *a) {
   struct us_internal_callback_t *cb = a->data;
+  Bun__traceGCWake("uv_async_callback", cb->loop->data.jsc_vm, cb->loop, 0);
   // internal asyncs give their loop, not themselves
   cb->cb((struct us_internal_callback_t *)cb->loop);
 }
@@ -398,7 +401,9 @@ void us_loop_run(struct us_loop_t *loop) {
     }
   }
 
+  Bun__traceGCWake("uv_poll_begin", loop->data.jsc_vm, loop, 0);
   uv_run(loop->uv_loop, UV_RUN_ONCE);
+  Bun__traceGCWake("uv_poll_end", loop->data.jsc_vm, loop, 0);
 }
 
 struct us_poll_t *us_create_poll(struct us_loop_t *loop, int fallthrough,
@@ -545,7 +550,8 @@ void us_internal_async_wakeup(struct us_internal_async *a) {
       (struct us_internal_callback_t *)a;
 
   uv_async_t *uv_async = (uv_async_t *)(internal_cb + 1);
-  uv_async_send(uv_async);
+  int result = uv_async_send(uv_async);
+  Bun__traceGCWake("uv_async_send", NULL, internal_cb->loop, result);
 }
 
 int us_socket_get_error(struct us_socket_t *s) {