[filipgutica]

Sync T3 Code upstream through e1f33e023c804226671736828b7d25e502bdb1db, 12 commits after #159. This brings in the rest of upstream's web performance work, including faster thread switching, and the fix for slow startup on large databases (pingdotgg#21122). Merge with a merge commit (gh pr merge --merge), not squash.

Changes

Upstream commits imported

• Web performance:
  • perf(web): switching threads no longer re-renders the outgoing thread's rows pingdotgg/t3code#21123: switching threads no longer re-renders the outgoing thread's rows.
  • perf(web): switching threads no longer re-renders the chat view for an unchanged preview list pingdotgg/t3code#21130: switching threads no longer re-renders the chat view when its preview list hasn't changed.
  • perf(web): reasoning rows skip the tool-failure text scan pingdotgg/t3code#21146: reasoning rows skip the tool-failure text scan.
  • perf(web): pull request chains parse each link's URL once pingdotgg/t3code#21147: pull request chains parse each link's URL once.
  • refactor(web): the command palette caches its derived lookups without "use memo" pingdotgg/t3code#21116: the command palette caches its derived lookups without use memo.
• Server: fix(server): opening a large database no longer blocks startup for minutes pingdotgg/t3code#21122, opening a large database no longer blocks startup for minutes.
• Mobile: feat(mobile): link, unlink and watch a thread's pull requests from its sheet pingdotgg/t3code#20394 adds pull request linking from a thread's sheet. test(mobile): measure renders on a device pingdotgg/t3code#21001 measures renders on a device.
• Other: test fixes and the shared PR link-input module.

Conflict resolutions

• ChatMarkdown.browser.test.tsx: took upstream's comment. The code it describes is identical on both sides.
• CommandPalette.tsx: kept the Workbench useVisibleThreads filter. Dropped projectOrder, which upstream no longer reads at that site.
• LinkPullRequestDialog.tsx: upstream moved resolveLinkPullRequestInput and the project resolver into @t3tools/client-runtime/pull-request-link-input. The dialog now uses that module, and the fork's duplicated copies are deleted. Workbench PR browsing and number search are unchanged. The one fork-specific error message gives way to upstream's wording, so the shared module stays unpatched.
• pnpm-lock.yaml: merged automatically. vp i ran on the merged tree.
• The CI ownership baseline now points to the pinned upstream SHA.
• The iOS segmented-control exclusion from chore(workbench): sync T3 Code upstream through 6a6ebb2 #159 still holds. No upstream commit in this range touches those files.

Verification

• Tests:
  • Unit: 80 passed, covering pullRequestLinkInput, threadPullRequestListLines, the dialog input tests, both command palette suites, and WorkbenchLinkPullRequest.
  • Browser: ChatMarkdown.browser.test.tsx, 69 passed.
• Typechecks: web, mobile, Workbench and client-runtime are clean.
• CI and isolation: node scripts/workbench-ci.ts --lint exits 0, with existing warnings only. --check and node scripts/workbench-isolation.ts pass.
• Fallow: fallow audit --base origin/main passes with nothing new introduced.
• After merge: confirm git merge-base --is-ancestor e1f33e023c origin/main.

Implemented with Claude Opus 5.5 in the Claude Code harness.

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-18T15:54:47.669093Z	45d450e	PR opened

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Reviewed commit: 45d450e2c2

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