Skip to content

Queue outstanding-issues request: mobile CLS regression on / #2059

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
BigSimmo merged 3 commits into from
Aug 17, 2026
+15 −0
Merged

Queue outstanding-issues request: mobile CLS regression on / #2059

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
42c5c61
docs(issues): queue inbox request for mobile CLS regression on /
claude Aug 17, 2026
40ac5e0
docs(ledger): record review for PR #2059 (CLS regression issue log)
claude Aug 17, 2026
0e8f939
Merge branch 'main' into claude/cls-regression-issue-log
BigSimmo Aug 17, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions ...ords/b95dcebed8f49816cdcac3eead65621d52cd793cb7c9d9e23546097645f24dd1.record.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
| 2026-08-17 | claude/cls-regression-issue-log | 42c5c6194e21b0b9c5a10b9400a872bac19b5ac9 | docs/outstanding-issues-inbox/d92786de-de31-4118-84cc-0a9098e7f2e0.json | created PR #2059: queued /issues inbox request tracking a real mobile CLS regression on / found while investigating PR #2050's unrelated Lighthouse budget failure | npm run issues:add (request validated as merge-safe) |
14 changes: 14 additions & 0 deletions docs/outstanding-issues-inbox/d92786de-de31-4118-84cc-0a9098e7f2e0.json
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,14 @@
{
"version": 2,
"id": "d92786de-de31-4118-84cc-0a9098e7f2e0",
"createdOn": "2026-08-17",
"action": "add",
"payload": {
"pri": "P2",
"type": "issue",
"summary": "Mobile CLS on / has regressed back to 0.236 (baseline 0.013), reopening #147",
"detail": "PR #2050 (unrelated differentials-UI change, Server Component, zero client-bundle delta) hit a Lighthouse budget failure: mobile-root CLS measured 0.236 against the committed 0.013 baseline, identical across two independent CI re-runs on two different head SHAs (63808d6b and f6dcb54a) with the pinned matching browser (grade did not refuse for evidence-incomplete/browser-drift, unlike the offline-harness case #147 documented). #147 was marked RESOLVED 2026-08-12 via PR #1616 (use-phone-overlay-chrome-reserve.ts, 80ms ResizeObserver quiet window) with home-page mobile CLS verified at exactly 0.013 -- the same number now used as baseline. Since main's own push-triggered CI skips the Lighthouse budget job entirely (it only runs on pull_request events with UI_CHANGED=true), this regression could have landed on main undetected by any merge that didn't itself touch UI-changed paths. Needs: bisect which merge into main reintroduced the CLS regression on / (or confirm it's not code but an infra/dependency drift), re-verify against the #147 fix's ResizeObserver/quiet-window logic, and unblock the Lighthouse budget CI gate for any PR unlucky enough to touch UI_CHANGED paths in the meantime. Stop: do not silently raise the baseline or disable the gate to clear this -- #147 explicitly warns against a false clean.",
"source": "PR #2050 CI runs 32043889926 and 32047381634 (Lighthouse budget failures), cross-referenced with docs/outstanding-issues.md #147 and #118",
"issueUlid": "01M08BGBTDTSWDA9D8R7XJWX6R"
}
}
Loading