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[Fix] Let the applied banner follow the build watch instead of turning green at checkout - #511
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…g green at checkout After a pull request is checked out on a Gutenberg site with the watch running, the banner went green while the resumed npm run dev was still removing build/ and rebuilding every package (#509). The colour said "ready to try" minutes before it was true. appliedBannerState (watch-activity.cjs) now decides tone, headline and body: amber and "The site is rebuilding" while the watch is building, with Revert carrying the same wait reason the ticket actions carry; red and "applied but not built" when the watch stopped or exited before its ready line; green otherwise, with the #492 compiling line as body while a hand-off is open. index.jsx mirrors buildInterruptedRef into state so the banner can read it, and renders the decision. The guide names the amber and red states. Fixes #509. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
… colour map Self-review findings on 5739f2e: the Revert button kept a bare disabled= after becoming a ReasonedButton, so an install or trunk update greyed it with no sentence; describePrCheckout still worded a headline nobody rendered; APPLIED_BANNER_COLORS had no fallback for a tone the module could add. Also the review rule the pass surfaced: journey locators that pin a string which turned conditional. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Understand this PR’s impact Explore downstream dependencies and potential security impact with Blast Radius. 📝 WalkthroughWalkthroughThe PR adds watch-aware states for the applied pull request banner. The banner now shows amber while rebuilding, red when the build is interrupted, and green when the watch is ready. The renderer tracks build interruption state and displays the computed title, body, colors, and revert reason. The checkout description contract and tests are updated, and the documentation describes the new states. Assessment against linked issues
Priority: ➖ Normal Severity of issue fixed: Medium Merge Risk: 🔵 Low · up to When rebuilding coincides with another blocked ticket action, Revert explains only the build wait. The new rebuilding and unbuilt banner states also lack journey-level verification. Address these bounded UI and coverage gaps before merging if practical. 🚥 Pre-merge checks | ✅ 3 | ❌ 1❌ Failed checks (1 inconclusive)
✅ Passed checks (3 passed)
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In `@src/renderer/index.jsx`:
- Line 5196: Replace the inline prBanner.revertReason || ticketActionsReason
decision for the Revert ReasonedButton with a testable src/renderer/*.cjs helper
that combines all nonempty wait reasons, preserving both messages when present.
Pass the helper’s result as the reason prop and add or update focused tests for
empty, single, and multiple reasons.
In `@src/renderer/watch-activity.cjs`:
- Line 160: Add journey-spec coverage for each appliedBannerState title,
including exact-text assertions for the building and unbuilt states using
appropriate fixtures, while retaining the existing assertion for the eventual
ready title.
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.github/instructions/code-review.instructions.mddocs/guide/applying-patches.mdsrc/renderer/index.jsxsrc/renderer/pr-checkout.cjssrc/renderer/watch-activity.cjstests/unit/pr-checkout-renderer.test.cjstests/unit/watch-activity.test.cjs
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CodeRabbit on a5c65c1: the `||` between the rebuild wait and the shared ticket-action gate was a renderer decision outside a testable module. appliedBannerState now takes actionsReason and returns the one reason Revert shows, with a test; index.jsx passes the gate through. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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…er, not as Y coordinates (#515) ## Why The `pr-checkout` journey ("a PR checkout keeps ticket work and later PR edits on their own branches") asserts that the applied banner sits under the ticket heading and above the linked pull requests by comparing three `boundingBox().y` values. It reads them right after the banner becomes visible, which is the moment `useNextActionCue` smooth-scrolls the banner into view (`scrollIntoView({ block: 'center', behavior: 'smooth' })`), so the three boxes can be read mid-glide and come back in any order. The macOS journeys job failed on it twice today, both attempts each time, on #511 and #513, two pull requests that change no layout; the failure snapshots showed the DOM in the right order, and `gh run rerun --failed` went green. ## What changes The assertion compares document order (`compareDocumentPosition`) instead of pixels. The card lays these three out in document order, so the order is the claim; a scroll cannot change it. ## How to test this Platform: either; the journey carries it. From the repository root: ``` npx playwright test --project=journeys tests/e2e/journeys/pr-checkout.spec.js -g "keeps ticket work" ``` Expected: green. Run three times in a row on macOS on the current head; the old assertion needed a rerun on two CI runs today. Nothing else in the journey changes. **What must not have happened:** the assertion passing with the banner rendered above the heading or below the linked pull requests. `compareDocumentPosition` with the elements swapped returns the preceding bit, and the check reads the following one only. ## Risks and limitations - Test only. No app code. ## Related Seen on #511 and #513. No issue: agreed not worth one until it kept failing, which it did. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
juanmaguitar
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Sep 23, 2026
… restarting it (#517) ## Why On a Gutenberg site with the build watch running, linking an issue, switching work items or unlinking paused the watch for the checkout and resumed it after. Gutenberg's `npm run dev` removes `build/` and rebuilds every package when it starts, so a branch switch that changed nothing under `packages/` cost a full rebuild: about 28 s on macOS, about 8 minutes on Windows, with nothing on screen saying why. Core's `grunt _watch` resumes for free, which is why this never showed there. Seen on the 21 Sep 2026 pass of #508: a number typed into the GitHub issue field linked issue #83258 and the watch rebuilt for five minutes. ## What changes The root cause is that every work-item switch planned itself as a whole-tree change (`planWatchImpact({ wholeTree: true })` in `ticketSwitchLifecycleRef.begin`), and a whole-tree change always pauses a live watch. That is right for the switch that puts back a pull request parked on a work item, because that one chains an install and a build of its own (#506). It is wrong for a plain link, unlink or switch, which only moves the checkout. The rebuild such a switch needs is the selective one a running watch already does: Git writes the files of the new branch, the watch recompiles those packages. That is the same bargain the app makes for a src-only patch (#262), and `planWatchImpact` already knew how to answer it. The switch only had to stop claiming to be whole-tree. - `planTicketSwitchImpact` (`src/renderer/update-plan.cjs`) asks it with the switch's real shape, from two numbers: the pull request checked out now and the one the target work item has parked. It also takes the watch's state rather than a boolean, because a watch that has started and not reached its ready line is rebuilding `build/` from scratch, not watching: a checkout landing under it would leave the packages it had already written on the old tree's output. Such a switch keeps the pause it had on trunk. Only a watch that is actually watching is handed the change. `prTransition = fromPr !== toPr` mirrors `ticketPrImpact` in main, which decides the same thing from the two refs after the fact. - The decision has to be made before the checkout starts, and `sites:set-ticket` only reports `prTransition` afterwards. So `branches:list` now reports `savedPr` per work item, from `savedPrRef` in `src/main.js`: the rule `ticketCheckoutRef` already applied, extracted so both sides read the record the same way. No extra Git read, since the existence check reuses the ref list the handler already has. - On a switch that keeps the watch, `complete` hands the change to it (`handOffToWatch`), so the **Build watcher** tab reads *(compiling)* until it goes quiet (#492), the same signal an applied patch gets. - A restore `begin` could not foresee (a retry of a failed switch, where main reads the ref the switch was leaving and the renderer cannot) still pauses, late, before its install. Deliberately not in it: a switch still runs no `npm install` when the two branches disagree on `package-lock.json`, exactly as before. ## How to test this Platforms: **either**, but macOS or Windows on a **real Gutenberg site** is what exercises the bug. The unit suite cannot reach it (no journey starts a build watch), so this is the pass that matters. Build: current head. **Starting state:** a Gutenberg site with `node_modules` installed and a first build done, no work item linked, no pull request checked out. From the worktree, `npm run build:once` before launching, since `src/renderer/index.js` is a build product. 1. Click **Start build watch**. Wait until the **Build watcher** tab reads *(watching)*. 2. Type an issue number into **GitHub issue number or URL** and click **Link issue**. Expected: the switch narrates itself as usual, the tab goes to *(compiling)* for a few seconds and back to *(watching)*. The watch is never *(paused)*, and its log shows no `npm run dev` start banner and no from-scratch rebuild of every package. 3. Click **Unlink**, then **Continue working on** that issue from the card below. Expected: the same, both times. 4. Now check out a pull request on that issue, then **Unlink**, then link the issue again. Expected: this switch *does* pause the watch, the checklist shows the build step skipped and names the resumed watch, and the applied banner follows the rebuild the way #511 left it. 5. Stop the watch and link another issue. Expected: nothing rebuilds, as before. 6. Click **Start build watch** and, while the tab still reads *(building)*, link an issue. Expected: this one *does* pause the watch, because it has not finished starting; the tab goes *(paused)* and the switch resumes it. Windows is where this is easy to hit, the window being minutes rather than seconds. **What must not have happened:** no full rebuild on steps 2 and 3 (the whole point: on Windows that is eight minutes), the watch not left *(paused)* on any path, the dev server not interrupted, the parked pull request in step 4 still restored with its install and build, and a `build/` that mixes two trees after step 6. The unit tests that carry the decisions fail on the old code: `planTicketSwitchImpact` did not exist, and `branches:list` returned no `savedPr` (checked). What they cannot see is the watch process itself, which is what the steps above are for. **Done on macOS 27 (M5 Pro), on the Buildkite artifact for `4cdedc8`**, on a built Gutenberg site, with issue [#83341](WordPress/gutenberg#83341) for steps 2 to 4, pull request [#83350](WordPress/gutenberg#83350) for step 4, and [#83324](WordPress/gutenberg#83324) for step 5. All five steps as written. The evidence for steps 2 and 3 is the **Build watcher** log itself: one `Running npm run dev…` for the whole run, the one from **Start build watch** at 15:04:31, ending in *Watching for changes*. Linking the issue, unlinking it and switching back to it added nothing to that log: no second start banner, no *Paused while another operation uses the build*, no from-scratch rebuild of every package. On trunk each of those three switches costs one. **Done again on Windows 11 (UTM VM, arm64 host), on the Buildkite artifact for `781e3be`**, the rebased head, on a built Gutenberg site at `C:\Users\JuanMa\Desktop\demo-gutenberg-3`. All six steps pass, and Windows is what answers the two questions macOS could not: - **Step 6, the switch taken while the watch is still starting.** The watch was paused and resumed, as the fix intends. The window is minutes here rather than seconds, which is how this case was found in the first place. - **The file handles.** Step 2's checkout rewrote files with the watch alive and nothing failed: no error from Git, no watch exit. The risk this PR declared open is closed. The watch then recompiled selectively, package by package (`rebundled` / `rebuilt` per package in its tab, `block-library` the longest at 19.7 s), rather than running the clean from-scratch cycle it runs on trunk, where the same switch costs about eight minutes. Steps 4, 5 and 6 behaved as on macOS: the plain switch back to a second work item kept the watch, the parked pull request paused it and handed the rebuild to the resumed watch, and with the watch stopped nothing rebuilt. Two lines the watch prints on Windows are worth knowing and are not this PR's: Gutenberg's own `dev.mjs` starts by reporting `'ps' is not recognized as an internal or external command`, and a watch killed mid-TypeScript-build (which is what a pause is) prints `TypeScript compilation failed` before it exits. The state machine is unaffected — the watch stayed `paused` and resumed correctly — but the tab reads like a build error when nothing is wrong. Step 4 behaved as it must: applying the pull request paused the watch and handed the rebuild to it, the applied banner sat amber reading *PR #83350 is applied. The site is rebuilding.* while the tab rebuilt, and turned green with the **Checked out the pull request** toast when the watch was watching again (#508, #511). Step 5, with the watch stopped, rebuilt nothing. ## Risks and limitations - Nothing disables **Link issue** while the watch is starting, so step 6's switch is offered throughout that window; it is now planned as a pause rather than refused. Disabling the ticket actions while the watch owns `build/` is the same family as #503 and is not done here. - **The watch now compiles while the checkout is still landing.** It will briefly see a half-written tree and may print resolution errors into its tab before the final write re-triggers it. Self-correcting, but noisier than the silence the paused watch gave. - ~~**Windows file handles.**~~ Answered by the Windows pass above: the checkout rewrote files under a live watch without an error on either side. - On Windows the watch prints `TypeScript compilation failed` when a pause kills it mid-build, so the tab reads like a failure although the pause is deliberate and the resume is clean. Cosmetic, pre-existing, and not made more likely by this PR, which pauses in one more case than before. - A switch between two branches whose `package-lock.json` differ still installs nothing. Unchanged from trunk, and out of scope here. - The renderer predicts the switch's shape from state it already holds (`pullRequest` from `site:status`, `savedPr` from `branches:list`, both reloaded after every switch) rather than asking main. A prediction that is wrong can only be wrong towards a needless pause, and the one case where it was is fixed in the second commit. ## Related Fixes #510. Follow-up to #508 and #506. Part of #251. --- <details> <summary>Design decisions and alternatives considered</summary> **A new IPC handler that previews the switch** would have been more faithful, since main would answer with the same function that later performs the switch. Rejected: it adds a round trip in front of a switch that already has one, and it does not remove the disagreement, it only moves it, since the record can still change between the preview and the switch. Reporting `savedPr` on a list the panel already reloads after every switch costs nothing and is read from the same record. **Asking Gutenberg's watch not to rebuild on start** is the other way to make the pause cheap. Out of scope: `npm run dev` has no such flag, and the upstream `--no-clean` work is not this repository's. **A journey (layer 4)** would replace the manual pass, per AGENTS.md. Nothing in `tests/e2e/` starts a build watch today, so it would mean building that fixture first: a fake `dev` script that prints the ready line and stays up, and an assertion that the process was never restarted. Worth doing, and deliberately not done here, so the fix can ship in beta.2. </details> <details> <summary>Review outcome (required — see AGENTS.md)</summary> 4 findings: **2 [fix here] · 2 [follow-up]**. Both `[fix here]` fixed in `4cdedc8`, one `[follow-up]` fixed with them, one recorded above. - 🟡 architecture/tests, `[fix here]`: the saved-pull-request lookup lived in `index.jsx`, where the suite cannot reach it (§1). **Fixed**: moved to `savedPrForSwitch` in `src/renderer/ticket-branch-list.cjs`, with its own tests. - 🟡 performance, `[fix here]`: re-linking the work item already in hand while its pull request is checked out read the row, found nothing (a branch records its parked pull request only when it is *left*), and paused the watch for a switch main performs as a no-op. The exact cost this PR removes, in the one case it was adding back. **Fixed**: linking the item in hand answers with the pull request already checked out. - 🔵 tests, `[follow-up]`: the `branches:list` test covered both negative reasons but not the ordinary row with no parked pull request. **Fixed** in the same commit. - 🔵 cross-platform, `[follow-up]`: the watch compiling a half-checked-out tree, and the Windows handle question. **Recorded** under Risks; no code change. - **Manual pass:** completed on macOS, on `4cdedc8`; see **How to test this**. - **Review:** completed, by a fresh agent context (`Explore` subagent, review standard in `.github/instructions/code-review.instructions.md`); reviewed head `964f651` (now `9fc3315`, same tree, commit message reworded) / base `origin/trunk`; `npm run lint` clean and `npm test` 1625 pass / 0 fail / 2 skipped at that head. - **Since review:** `964f651` to `4cdedc8`, the review's own findings, plus their tests. `npm run lint` clean, `npm test` 1630 tests / 1628 pass / 0 fail / 2 skipped at the new head. CodeRabbit requested on `4cdedc8` by comment once the PR left draft. </details> <details> <summary>Screenshots or recording</summary> Nothing on screen changes shape. What changes is what the **Build watcher** tab says during a work-item switch, and above all what its log does **not** say: on this branch a link, unlink or switch adds nothing to it, where on trunk each one starts `npm run dev` again and rebuilds every package. The log excerpt in **How to test this** is that evidence. </details> --------- Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Why
After a pull request is checked out on a Gutenberg site with the build watch running, the card showed the green PR #N is applied. banner as soon as the checkout was done, while the resumed
npm run devwas still removingbuild/and rebuilding every package: about 40 s on an M5 Pro, about eight minutes on Windows (#508's pass). The site answers with Gutenberg's requires files to be built notice for all of it. #492 added a wait line, but the colour said "ready to try" before anyone read it (#509).What changes
The decision.
appliedBannerStateinsrc/renderer/watch-activity.cjstakes the PR number, the watch state, the #492 compiling flag and whether the last rebuild was cut short, and returns the banner's tone, headline, body and the reason Revert waits, the wayapplyFinishMessagealready decides the terminal line:buildingRevert. The button now carries every reason the ticket actions carry (install, build, trunk update) plus the rebuild wait, through
ReasonedButton, instead of a baredisabled.The wiring.
buildInterruptedRefinsrc/renderer/index.jsxalready knew that a watch stopped mid-rebuild leavesbuild/incomplete (#499); it was a ref, so the banner could not read it.markBuildInterruptednow moves the ref and a state together at the four places that set or clear it. The banner reads the decision;describePrCheckoutis untouched, so the green headline the journeys assert is the same string. The guide names the amber and red states.How to test this
Platform: either. Build: the Buildkite artifact for the current head, or
npm startfrom the repository root. Use a copy of a built Gutenberg site, not one you care about.Starting state: a built Gutenberg site with the Build watcher tab reading (watching).
npm run build.What must not have happened: a green banner while the tab reads (building); a banner that stays amber or red after the tab reads (watching); a Core site's banner changing colour at all (its checkout runs its own build before the banner appears).
Done on macOS, on the current head, by a Playwright script driving the app against a scratch copy of a built Gutenberg trunk, PR #83258: amber with the rebuilding headline, Revert disabled with the tooltip and the tab at (building) 8 s after Check out; green with the toast 46.8 s in; stop during the rebuild turns it red in under a second; Start build watch turns it amber, then green at (watching) 38 s later; both reverts end on Restored the previous branch. The script read the banner's computed border and background colours at each step. Done on Windows 11 (UTM VM, arm64 host), Buildkite artifact for
a5c65c1, by hand, on a Gutenberg site with the watch running and no issue linked: steps 1 and 2 as expected, amber with the headline and the greyed Revert with its tooltip as soon as the checkout was done, green with Revert enabled when the tab read (watching), the watch's own build reported 215 s.Tests:
tests/unit/watch-activity.test.cjs, five#509cases, fail on trunk (appliedBannerStatedid not exist) and pass here. Lint clean, 1610 unit tests pass. Steps 3 to 5 repeated on the head commit after the review fixes. Thegutenberg-siteandpr-checkoutjourneys assert the green headline; their fixtures run no watch, so the banner is green at once and they pass unchanged.Risks and limitations
npm run buildor the watch's next ready line clears. A build run from a terminal outside the app does not clear it, so the banner stays red until the app builds or watches again. Pre-existing for the dev-server guard (Gutenberg: starting the dev server rebuilds the packages first; start Playground at once when build/ exists and start the watch on demand #499), now visible..diff/.patchfile applied on Gutenberg with a lockfile move, the only patch path that pauses the watch) keeps the Nothing on screen says the build watch is still compiling a pull request just applied #492 line without the colour change. Same shape if wanted; out of scope here.Related
Fixes #509. Builds on #492, #499, #508. Part of #251, v1.2.0-beta.2.
Review outcome (required — see AGENTS.md)
3 [fix here] · 3 [follow-up] on
5739f2e— all three fix-here fixed ina5c65c1.disabled=after becoming aReasonedButton, so an install or trunk update greyed it with no sentence; it now composes the rebuild wait withticketActionsReason.describePrCheckoutstill worded a headline nobody rendered, pinned by two tests; removed,appliedBannerStateowns it.APPLIED_BANNER_COLORShad no fallback for a tone the module could add; falls back to green likeWATCH_DOT_COLORS.appliedBannerStatewould need a subject parameter to serve it. Listed under Risks.build/incomplete. Contrived; wording only.ticket-actions.cjs; the composition above makes the copy inwatch-activity.cjsreachable only from the building tone.a5c65c1: 2 actionable. The Revert reason decided inline inindex.jsx: fixed inb4613c2,appliedBannerStatedecides it. Journey assertions for the amber and red headlines: declined, the journey fixtures cannot run Gutenberg's watch; answered inline.exact: truethat pin a string which turned conditional. Added to.github/instructions/code-review.instructions.md§5.🤖 Generated with Claude Code