diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9f7614e5..63cb9b38 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,19 +4,21 @@ on:
   push:
     branches: [main]
   pull_request:
+    types: [opened, synchronize, reopened, ready_for_review, converted_to_draft, closed]
 
 permissions:
   contents: read
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.repository }}-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.repository }}-${{ github.event.pull_request.number || github.run_id }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
 jobs:
   build-and-test:
+    if: ${{ github.event_name != 'pull_request' || (!github.event.pull_request.draft && github.event.action != 'closed') }}
     runs-on: ubuntu-24.04
     timeout-minutes: 30
     steps:
@@ -51,6 +53,7 @@ jobs:
         run: pnpm build:demo
 
   browser-release-evidence:
+    if: ${{ github.event_name != 'pull_request' || (!github.event.pull_request.draft && github.event.action != 'closed') }}
     name: Cross-engine Clipboard / Playwright 1.62.0
     runs-on: ubuntu-24.04
     timeout-minutes: 60
@@ -84,6 +87,7 @@ jobs:
         run: pnpm --dir tests/browser exec playwright test --config playwright.config.ts
 
   office:
+    if: ${{ github.event_name != 'pull_request' || (!github.event.pull_request.draft && github.event.action != 'closed') }}
     name: Office / Python ${{ matrix.python-version }}
     runs-on: ubuntu-24.04
     timeout-minutes: 30
diff --git a/src/workflowExactHead.test.ts b/src/workflowExactHead.test.ts
index 828c2828..4718bf47 100644
--- a/src/workflowExactHead.test.ts
+++ b/src/workflowExactHead.test.ts
@@ -70,9 +70,11 @@ const officeJob = workflowJob(workflow, 'office');
 describe('exact-head CI workflow contract', () => {
   it('cancels only superseded runs for the same repository and PR while keeping full main compatibility coverage', () => {
     expect(workflow).toContain(
-      "group: ${{ github.workflow }}-${{ github.repository }}-${{ github.event.pull_request.number || github.ref }}",
+      "group: ${{ github.workflow }}-${{ github.repository }}-${{ github.event.pull_request.number || github.run_id }}",
+    );
+    expect(workflow).toContain(
+      "cancel-in-progress: ${{ github.event_name == 'pull_request' }}",
     );
-    expect(workflow).toContain('cancel-in-progress: true');
     expect(officeJob).toContain(
       "python-version: ${{ github.event_name == 'pull_request' && fromJSON('[\"3.14\"]') || fromJSON('[\"3.11\", \"3.12\", \"3.13\", \"3.14\"]') }}",
     );
@@ -82,6 +84,16 @@ describe('exact-head CI workflow contract', () => {
     expect(releaseWorkflow).toContain('cancel-in-progress: false');
   });
 
+  it('cancels stale PR work and skips inactive pull requests', () => {
+    expect(workflow).toContain(
+      'types: [opened, synchronize, reopened, ready_for_review, converted_to_draft, closed]',
+    );
+    for (const job of [buildJob, browserJob, officeJob]) {
+      expect(job).toContain('!github.event.pull_request.draft');
+      expect(job).toContain("github.event.action != 'closed'");
+    }
+  });
+
   it('uses a fixed runner and checks out the immutable current PR head in every job', () => {
     expect(workflow).not.toContain('ubuntu-latest');
     for (const job of [buildJob, browserJob, officeJob]) {