ci: typecheck gui/ in prepush when the branch changes it (carry #6485, #6592)

[lidge-jun]

Summary

bun run prepush typechecks only the root project: tsconfig.json includes src and has no project references, so a compile error in gui/ passes every local gate. Fork pull requests do not run the CI "GUI build" step, so on #6471 a TS2304 in gui/src/pages/Usage.tsx reached ready-for-review before any maintainer build caught it.

prepush now runs a new typecheck:gui:if-changed step right after the root typecheck. scripts/typecheck-gui-if-changed.ts mirrors the existing lint and React Doctor if-changed gates:

• It diffs the branch against the merge base with upstream/dev, then origin/dev, then dev (the order test:changed uses). It does not use @{u}, because prepush is a package script and never sees the push destination.
• When any path is gui or under gui/, it runs tsc -b in gui/ with process.execPath and propagates the compiler's exit status. A failed spawn exits 1.
• Paths are read with -z (non-ASCII names) and --no-renames (a file moved out of gui/ still reports its gui/ source).
• When no base resolves, or git cannot compute the diff, the check runs instead of skipping.

This carries #6485 and #6592 by @lcxhh521 as one maintainer change, with a Co-authored-by trailer on the commit. Both source PRs are superseded by this one. The sol review of the carry added two changes on top of the contributor's work: rename detection is off (above), and the failure test now uses a Bun compiler stub that exits 23 and asserts that exact code, plus a missing-executable case. It no longer uses false, which native Windows does not provide.

Only the scripts block of package.json changes; no dependency, lockfile, workflow, or release surface is touched.

Verification

No local tests were run, per owner instruction for this landing round; test evidence is hosted CI at this head.

Static checks at the PR head: bun run typecheck, bun run structure:check, bun run privacy:scan, bun scripts/file-size-ratchet.ts, and git diff --check origin/dev...HEAD all exit 0. bun build --no-bundle parses the new script and test (root typecheck covers src only). A dry run of the gate in this checkout (TYPECHECK_DRY_RUN=1) prints typecheck:skip, which is correct for a branch with no gui/ changes.

Tests that CI runs: tests/ci-workflows/ci-gui-typecheck-gate.test.ts covers the script entry and prepush order, run/skip decisions, exact exit propagation, a missing compiler, and five fixture-repository cases (non-gui skip then gui run, a rename out of gui/, a non-ASCII gui path, a gui change already on the tracking branch, an uncomputable diff). It also checks that the CI GUI build step stays under the gui filter. tests/ci-workflows/ci-workflows.test.ts asserts the full prepush chain.

Checklist

• Scope stays focused and avoids unrelated cleanup.
• Docs or release notes were updated when needed. (Contributor tooling only; the script header documents the gate.)
• Security-sensitive changes were reviewed for secrets, auth, and unsafe defaults. (Adds a local package script; no credentials, network, install, or CI surface.)

Co-authored-by: lcxhh 59329914+lcxhh521@users.noreply.github.com

Summary by CodeRabbit

• Chores
  • Pre-push checks now run the GUI type check when GUI files have changed, before GUI linting.
  • The check is skipped when GUI files are unchanged and runs if changes cannot be determined.
• Tests
  • Added coverage for when the GUI check runs or skips, and how it handles failures.

[github-actions]

✅ Deterministic PR hygiene checks passed.

[coderabbitai]

Navigate logical layers of code changes, visualize relationships, and explore their blast radius.

📝 Walkthrough

Walkthrough

The prepush command now runs a GUI-specific typecheck gate after the root typecheck and before GUI lint. The gate detects changed GUI paths and runs the GUI TypeScript build when required. New tests cover path detection, command outcomes, and workflow wiring.

Changes

GUI Typecheck Gate

Layer / File(s)	Summary
Detect GUI changes and run typecheck scripts/typecheck-gui-if-changed.ts, package.json	The script checks changed paths against available base refs, supports TYPECHECK_FILES and dry-run mode, and runs the GUI TypeScript build when GUI paths changed or detection fails. The prepush script invokes the gate after the root typecheck and before GUI lint.
Validate gate decisions and wiring tests/ci-workflows/ci-gui-typecheck-gate.test.ts, tests/ci-workflows/ci-workflows.test.ts, scripts/test-layout/layout.json, tests/fixtures/test-layout-expected.json	Tests cover gate decisions, compiler exit handling, package-script ordering, and the GUI build workflow condition. The test-layout manifest and fixture include the new test.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant Prepush
  participant GuiTypecheckGate
  participant Git
  participant Tsc
  Prepush->>GuiTypecheckGate: invoke typecheck:gui:if-changed
  GuiTypecheckGate->>Git: detect changed paths from base ref
  Git-->>GuiTypecheckGate: return changed paths or diff failure
  GuiTypecheckGate->>Tsc: run tsc -b when GUI paths changed or detection fails

Loading

Merge Risk: 🔵 Low · up to 90754

A push to an older dev remote can include GUI changes that the optional local typecheck skips. The change is mergeable with this bounded gap understood, though checking all available bases would close it.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: running the GUI typecheck during prepush when the branch changes GUI files. The carried issue numbers add minor noise but do not obscure the purpose.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 3 files. (3 skipped: 3 …
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @scripts/typecheck-gui-if-changed.ts:
- Around line 70-71: Update the base-selection and diff logic using hasRef and
diffNames to compare HEAD against every available candidate base, and run the
GUI typecheck if any comparison includes gui/. Preserve the existing
run-on-diff-failure behavior and add a fixture where origin/dev is behind
upstream/dev.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: Repository: lidge-jun/opencodex/.coderabbit.yaml
• Review profile: ASSERTIVE
• Plan: Advanced
• Run ID: fc74fd28-889d-4ccc-8045-06d393dd3578

📥 Commits

Reviewing files that changed from the base of the PR and between 37189ca and 907540a.

📒 Files selected for processing (6)

• package.json
• scripts/test-layout/layout.json
• scripts/typecheck-gui-if-changed.ts
• tests/ci-workflows/ci-gui-typecheck-gate.test.ts
• tests/ci-workflows/ci-workflows.test.ts
• tests/fixtures/test-layout-expected.json

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 7 remain after this review.

[lidge-jun]

Maintainer integration (lidge-jun, dev only) — 2026-10-05 bug triage round 2, lane B6.

• Head: 907540a
• CI at this head: PR CI 37318183052; full-matrix 37318315958 green except windows 3/9 in cli-update-restart-home.test.ts (outside this diff, also red on dev); every executed job passed.
• Review: GUI typecheck gate script and prepush wiring, carrying ci: add an if-changed gui typecheck gate script (#6471 gap) #6485 and ci: run the gui typecheck gate in prepush #6592 with Co-authored-by lcxhh521; independent review passed after fixes; tooling-only.
• No local tests were run, per owner instruction; hosted CI is the evidence.
• scripts/ci/assert-mergeable-review.sh --maintainer-integration: OK.