ci: more webkit sharding, limit workers.

.github/workflows/playwright.yml

@@ -14,15 +14,33 @@ on:
 
 jobs:
   e2e:
-    name: E2E (Playwright, ${{ matrix.browser }})
+    name: ${{ matrix.jobName }}
     runs-on: ubuntu-latest
     timeout-minutes: 35
     strategy:
       fail-fast: false
       matrix:
-        browser:
-          - chromium
-          - webkit
+        include:
+          - browser: chromium
+            jobName: E2E (Playwright, chromium)
+            workers: 2
+            shardIndex: 1
+            shardTotal: 1
+          - browser: webkit
+            jobName: E2E (Playwright, webkit, shard 1/3)
+            workers: 1
+            shardIndex: 1
+            shardTotal: 3
+          - browser: webkit
+            jobName: E2E (Playwright, webkit, shard 2/3)
+            workers: 1
+            shardIndex: 2
+            shardTotal: 3
+          - browser: webkit
+            jobName: E2E (Playwright, webkit, shard 3/3)
+            workers: 1
+            shardIndex: 3
+            shardTotal: 3
 
     steps:
       - name: Checkout
@@ -54,20 +72,25 @@ jobs:
       - name: Run Playwright Tests
         env:
           CI: 'true'
-        run: npm run test:e2e -- --project=${{ matrix.browser }}
+        run: |
+          SHARD_ARGS=''
+          if [ '${{ matrix.shardTotal }}' != '1' ]; then
+            SHARD_ARGS="--shard=${{ matrix.shardIndex }}/${{ matrix.shardTotal }}"
+          fi
+          npm run test:e2e -- --project=${{ matrix.browser }} --workers=${{ matrix.workers }} $SHARD_ARGS
 
       - name: Upload Playwright report
         uses: actions/upload-artifact@v6.0.0
         if: ${{ failure() }}
         with:
-          name: playwright-report-${{ matrix.browser }}
+          name: playwright-report-${{ matrix.browser }}-${{ matrix.shardIndex }}of${{ matrix.shardTotal }}
           path: playwright-report
           if-no-files-found: ignore
 
       - name: Upload Playwright test results
         uses: actions/upload-artifact@v6.0.0
         if: ${{ failure() }}
         with:
-          name: test-results-${{ matrix.browser }}
+          name: test-results-${{ matrix.browser }}-${{ matrix.shardIndex }}of${{ matrix.shardTotal }}
           path: test-results
           if-no-files-found: ignore

docs/webkit-open-pr-drawer-triage.md

@@ -0,0 +1,144 @@
+# WebKit Open PR Drawer Triage Handoff
+
+Date: 2026-03-29
+Repository: develop
+Branch: bananas
+
+## Scope
+
+This document captures investigation and fixes for WebKit failures in Playwright tests in playwright/github-pr-drawer.spec.ts.
+
+Original failing subset:
+
+- Open PR drawer confirms and submits component/styles filepaths
+- Open PR drawer validates unsafe filepaths
+- Open PR drawer allows dotted file segments that are not traversal
+
+## Original symptoms
+
+- Test flow appeared to continue behind a confirmation dialog in WebKit.
+- Assertions expecting browser dialog events failed (browserDialogSeen false).
+- In some runs, Open PR status remained at the default neutral text:
+  Configure repository, file paths, and branch details.
+
+## Root cause summary
+
+- The app uses a shared in-page dialog opened by showModal for Open PR confirmation when confirmBeforeSubmit is wired.
+- In WebKit, top-layer dialog timing and interaction can be flaky for test automation.
+- The old test logic and app behavior supported two confirmation paths (HTML dialog and native confirm), which increased test complexity and flake risk.
+
+## Relevant app wiring (for context)
+
+- PR drawer submit uses confirmBeforeSubmit when available in src/modules/github-pr-drawer.js.
+- App passes confirmBeforeSubmit to confirmAction in src/app.js.
+- confirmAction opens the shared dialog element with id clear-confirm-dialog via showModal.
+- Native window.confirm fallback has been removed.
+
+## Changes made
+
+Files:
+
+- playwright/github-pr-drawer.spec.ts
+- src/app.js
+- src/modules/github-pr-drawer.js
+
+1. Simplified tests to one confirmation path: HTML dialog only.
+2. Removed dual-path test handling (native browser dialog vs in-page dialog).
+3. Removed manual loop-based visibility fallback logic in tests.
+4. Kept stable submit/confirm interactions and path-input stabilization in PR drawer tests.
+5. Removed fallbackConfirmText usage from app call sites and PR drawer payload.
+6. Removed native window.confirm fallback logic from confirmAction.
+7. Unsupported dialog environments now no-op silently instead of showing a fallback prompt.
+
+## Current status
+
+Latest runs are green:
+
+Command:
+CI=true npx playwright test playwright/github-pr-drawer.spec.ts --project=webkit --headed --grep "Open PR drawer confirms and submits component/styles filepaths"
+Result:
+1 passed
+
+Command:
+CI=true npx playwright test playwright/github-pr-drawer.spec.ts --project=webkit --headed --grep "Open PR drawer confirms and submits component/styles filepaths|Open PR drawer allows dotted file segments that are not traversal|Open PR drawer validates unsafe filepaths"
+Result:
+3 passed
+
+Command:
+npx playwright test playwright/github-pr-drawer.spec.ts --project=chromium
+Result:
+15 passed
+
+Command:
+CI=true npx playwright test playwright/github-pr-drawer.spec.ts --project=webkit
+Result:
+15 passed
+
+## Local changes currently present
+
+- playwright/github-pr-drawer.spec.ts (modal-only confirmation helper refactor)
+- src/app.js (removed native confirm fallback and fallbackConfirmText usage)
+- src/modules/github-pr-drawer.js (removed fallbackConfirmText in submit confirmation payload)
+- playwright.config.ts (workers changed from CI 2 to CI 1)
+- package.json (added test:e2e:webkit using CI=true)
+
+Note: playwright.config.ts worker change may be unrelated to this issue. Treat it as separate unless intentionally part of CI stabilization.
+
+## Evergreen policy alignment
+
+- Project policy is evergreen browsers only.
+- HTML dialog support is assumed.
+- No compatibility fallback is maintained for non-supporting/legacy environments.
+
+## If this flakes again
+
+1. Re-run only failing test first with headed mode and trace.
+2. Confirm clear-confirm-dialog opens and confirm button click is delivered.
+3. Confirm request flow occurs by adding temporary request counters for:
+
+- git refs create
+- contents upsert
+- pulls create
+
+4. If status remains default, verify submit click dispatch with a temporary event probe in test page context.
+5. Keep assertions outcome-based (status/request side effects), not browser-event-path assumptions.
+
+## Suggested next validation
+
+1. Run full github-pr-drawer.spec.ts on WebKit.
+2. Run same spec on Chromium and Firefox to ensure no regressions from helper changes.
+3. If stable, keep helper approach and remove any temporary probes.
+
+## Minimal rollback plan
+
+Use this only if WebKit flakiness returns and you need to quickly de-risk test helper changes.
+
+1. In playwright/github-pr-drawer.spec.ts, rollback only interaction mechanics first:
+
+- replace DOM evaluate click calls with standard Playwright click calls.
+
+2. Keep path validation stabilizers unless proven harmful:
+
+- keep explicit toHaveValue checks.
+- keep blur before submit in validation tests.
+
+3. If still flaky, narrow rollback to failing tests only:
+
+- inline confirmation flow in the failing tests and temporarily bypass shared helper usage.
+
+4. Do not reintroduce native confirm fallback as a flake workaround.
+5. Do not mix rollback with config churn:
+
+- avoid changing playwright.config.ts in the same rollback commit unless worker count is confirmed root cause.
+
+Quick validation after each rollback step:
+
+Command:
+CI=true npx playwright test playwright/github-pr-drawer.spec.ts --project=webkit --headed --grep "Open PR drawer confirms and submits component/styles filepaths"
+
+Then:
+
+Command:
+CI=true npx playwright test playwright/github-pr-drawer.spec.ts --project=webkit --headed --grep "Open PR drawer confirms and submits component/styles filepaths|Open PR drawer allows dotted file segments that are not traversal|Open PR drawer validates unsafe filepaths"
+
+Stop rollback at first stable step and keep the smallest diff that remains green.

package.json

@@ -37,6 +37,7 @@
     "check-types": "tsc -p tsconfig.json",
     "lint:playwright": "eslint playwright playwright.config.ts src/index.html",
     "test:e2e": "npm run build && PLAYWRIGHT_WEB_SERVER_MODE=preview PLAYWRIGHT_PORT=8081 playwright test",
+    "test:e2e:webkit": "npm run build && PLAYWRIGHT_INCLUDE_WEBKIT=true PLAYWRIGHT_WEB_SERVER_MODE=preview PLAYWRIGHT_PORT=8081 playwright test --project=webkit",
     "test:e2e:dev": "playwright test",
     "test:e2e:headed": "npm run build && PLAYWRIGHT_WEB_SERVER_MODE=preview PLAYWRIGHT_PORT=8081 playwright test --headed",
     "test": "echo \"Error: no test specified\" && exit 1",

playwright.config.ts

@@ -2,6 +2,7 @@ import { defineConfig, devices } from '@playwright/test'
 
 const env = process.env
 const isCI = env?.CI === 'true'
+const includeWebKit = env?.PLAYWRIGHT_INCLUDE_WEBKIT === 'true'
 const HOST = env?.PLAYWRIGHT_HOST ?? '127.0.0.1'
 const PORT = Number(env?.PLAYWRIGHT_PORT ?? 4174)
 const baseURL = env?.PLAYWRIGHT_BASE_URL ?? `http://${HOST}:${PORT}`
@@ -20,7 +21,7 @@ const projects = [
   },
 ]
 
-if (isCI) {
+if (isCI || includeWebKit) {
   projects.push({
     name: 'webkit',
     use: { ...devices['Desktop Safari'] },
@@ -31,7 +32,7 @@ export default defineConfig({
   testDir: 'playwright',
   timeout: isCI ? 120_000 : 20_000,
   retries: isCI ? 1 : 0,
-  workers: isCI ? 2 : undefined,
+  workers: isCI ? 1 : undefined,
   expect: {
     timeout: isCI ? 90_000 : 15_000,
   },