ci: scope triage finalize concurrency to PR runs

Co-authored-by: Qwen-Coder <[email protected]>

.github/workflows/qwen-triage-finalize.yml

@@ -44,10 +44,15 @@ permissions:
   contents: 'read'
 
 concurrency:
-  # One finalize at a time per head SHA: concurrent completions (CI + E2E)
-  # would read-modify-write the same comment. cancel-in-progress: false — the
-  # queued run re-reads fresh state, so the last one always converges.
-  group: 'qwen-triage-finalize-${{ github.event.workflow_run.head_sha }}'
+  # PR runs serialize per head SHA because concurrent completions would
+  # read-modify-write the same comment. Non-PR firings can never have a triage
+  # comment to finalize, so give them a unique group instead of letting them
+  # occupy a PR's group before the job-level PR gate skips them.
+  # cancel-in-progress: false — the queued PR run re-reads fresh state, so the
+  # last one always converges.
+  group: >-
+    qwen-triage-finalize-${{ github.event.workflow_run.event == 'pull_request'
+      && github.event.workflow_run.head_sha || github.run_id }}
   cancel-in-progress: false
 
 jobs:

scripts/tests/qwen-triage-finalize-workflow.test.js

@@ -51,11 +51,13 @@ describe('qwen-triage-finalize workflow', () => {
     expect(workflow.jobs.finalize.steps).toHaveLength(1);
   });
 
-  it('serializes concurrent finalize runs per head SHA without cancelling', () => {
-    // Two listed workflows can complete near-simultaneously; a cancelled run
-    // would drop its read-modify-write, so queue instead of cancel.
-    expect(workflowText).toContain(
-      "group: 'qwen-triage-finalize-${{ github.event.workflow_run.head_sha }}'",
+  it('serializes PR finalize runs per head SHA without cancelling', () => {
+    // Two listed workflows can complete near-simultaneously; a cancelled PR
+    // run would drop its read-modify-write, so queue instead of cancel.
+    // Non-PR firings get a unique group so they never occupy a PR's group
+    // before the job-level event gate skips them.
+    expect(workflow.concurrency.group).toBe(
+      "qwen-triage-finalize-${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.head_sha || github.run_id }}",
     );
     expect(workflowText).toContain('cancel-in-progress: false');
   });