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ci: stop setting up Bun in four guard matrix jobs that never use it - #13483

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@teamleaderleo teamleaderleo commented Sep 21, 2026 •

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Summary

workflow-guard-tests runs as a five-way Linux matrix: preflight, ci, app-host, release, and quality.

The Bun setup step currently runs in all five jobs, while the only Bun consumers in this workflow are preflight-only:

  • the Claude environment behavior test;
  • control-plane generated type verification via bunx/quicktype.

Gate setup-bun to matrix.group == 'preflight'.

Effect

Every routed guard run avoids four unnecessary Bun setup action invocations — one each in ci, app-host, release, and quality — with zero test coverage change.

A regression assertion pins the setup step to preflight and verifies there is one Bun setup action in the guard job.


Summary by cubic

Gates Bun setup in workflow-guard-tests to the preflight and release matrix groups, skipping three redundant setup actions per routed run (ci, app-host, quality) with no test coverage change. The release group is kept because its decision harness for test_ios_testflight_main_push_filter.py launches Bun.

  • Adds a regression test asserting Bun setup is gated to preflight and release and appears exactly once.
  • Updates the compile admission test to read from the macOS workflow file it depends on.

Written for commit 2912c65. Summary will update on new commits.

Review in cubic

Summary by CodeRabbit

  • Bug Fixes

    • Improved release validation reliability by ensuring the required setup runs for both preflight and release checks.
  • Tests

    • Added automated coverage to verify setup runs only for applicable validation groups and is configured once.
    • Updated workflow validation to continue tracking product identity independently from CI orchestration changes.

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📝 Walkthrough

Walkthrough

The guard workflow now installs Bun for the preflight and release matrix groups. Tests verify this condition, the Bun setup action count, the release-group test, and the macOS workflow used for fingerprint checks.

Changes

Guard workflow update

Layer / File(s) Summary
Gate and validate Bun setup
.github/workflows/ci-guards.yml, tests/test_ci_change_areas.py
The Bun setup step now runs for the preflight and release groups. The test checks the condition, one setup-bun@ occurrence, and the release-group test.
Target the macOS admission workflow
tests/test_ci_change_areas.py
The fingerprint test now reads the workflow from MACOS_WORKFLOW instead of CI_WORKFLOW.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Refactor

Merge Risk: ⚪ Minimal · up to 2912c

The workflow avoids unnecessary Bun setup while preserving it for preflight and release checks, with regression coverage for the conditions. No merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 22 | ❌ 3

❌ Failed checks (3 warnings)

Check name Status Explanation Resolution
Title check ⚠️ Warning The title describes the Bun setup change but incorrectly states that four guard matrix jobs never use Bun. The final change keeps Bun setup for the release group and removes it from three groups. Update the title to reflect that Bun setup is restricted to the preflight and release groups, or that it is removed from the ci, app-host, and quality groups.
Description check ⚠️ Warning The description provides a useful summary and explains the intended effect, but it omits the required Testing section, review trigger, and checklist. It also contains conflicting statements about whet… Add the Testing section with verification details, include the review trigger and checklist sections, and resolve the conflicting preflight-only versus preflight-and-release descriptions.
Docstring Coverage ⚠️ Warning Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 1 files. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (22 passed)
Check name Status Explanation
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.
Cmux Cloud Persistent Session And Early Input ✅ Passed PASS: The pull request changes only GitHub Actions guard-job setup and CI regression tests. It does not modify Cloud terminal creation, cmux-tui transport, manual renderer admission, input routing, au…
Cmux Swift Actor Isolation ✅ Passed PASS: The pull request changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The diff contains no Swift production changes and no actor-isolation constructs. The Swift ac…
Cmux Swift Blocking Runtime ✅ Passed PASS: The authoritative pull-request diff changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. It changes GitHub Actions conditions and Python test logic. No Swift file …
Cmux Browser Automation Off-Main ✅ Passed PASS. The pull request changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The diff adds a Bun setup condition and CI assertions; it does not change browser socket comm…
Cmux Expensive Synchronous Load ✅ Passed PASS: The pull request changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The authoritative diff contains no production Swift changes and does not add or move any agen…
Cmux Cache Substitution Correctness ✅ Passed PASS: The pull request changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The diff adds a workflow condition, changes a Python test fixture path, and adds Python asser…
Cmux No Hacky Sleeps ✅ Passed PASS. The pull request changes only GitHub Actions YAML and Python regression-test code. The runtime rule explicitly excludes GitHub Actions workflow YAML, and the diff introduces no fixed sleeps, tim…
Cmux Algorithmic Complexity ✅ Passed PASS: The pull request changes only a GitHub Actions condition and Python test assertions. It introduces no production Swift, TypeScript, JavaScript, shell, or runtime algorithm. The algorithmic-compl…
Cmux Swift Concurrency ✅ Passed PASS — The authoritative PR diff changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. It contains no changed Swift source and introduces no Swift concurrency pattern. Th…
Cmux Swift @Concurrent ✅ Passed The pull request changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The authoritative diff contains no Swift or Objective-C source changes, so the Swift @concurrent …
Cmux Swift Package Boundaries ✅ Passed PASS: The pull request changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The authoritative diff contains no Swift files or production Swift changes, so the Swift pack…
Cmux Swiftpm Lockfiles ✅ Passed PASS. The PR changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The workflow diff adds a Bun matrix condition, and the test diff changes workflow input and adds Bun as…
Cmux Swift Logging ✅ Passed The pull request changes only GitHub Actions YAML and Python test code. The authoritative diff contains no Swift paths and adds no Swift logging statements. The Swift logging check is therefore not ap…
Cmux User-Facing Error Privacy ✅ Passed PASS — The pull request changes only an internal GitHub Actions guard workflow and its regression tests. The diff adds a matrix condition for the Bun setup action and changes a test fixture path. It a…
Cmux Full Internationalization ✅ Passed PASS. The pull request changes only a CI workflow condition and a regression test. The workflow change is operational and not user-facing. The test assertion and comment are developer-only. No Swift t…
Cmux Swiftui State Layout ✅ Passed PASS: The pull request changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The authoritative diff contains no Swift or SwiftUI changes, so the SwiftUI state-layout crit…
Cmux Architecture Rethink ✅ Passed PASS: The authoritative pull-request diff changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. It contains no Swift files or Swift architectural changes, so the Swift-sp…
Cmux Swift Auxiliary Window Close Shortcuts ✅ Passed PASS. The authoritative PR diff changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. It contains no Swift, NSWindow, NSPanel, NSWindowController, SwiftUI Window, or Wind…
Cmux Source Artifacts ✅ Passed PASS: The PR changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. These are an intentional CI configuration change and a regression test. The diff adds no local output, …
Cmux No Test Or Debug Seam In Production Source ✅ Passed PASS: The pull request changes only .github/workflows/ci-guards.yml and tests/test_ci_change_areas.py. The authoritative diff contains no Swift files under a production Sources/ path, so it cann…
Full details: Description check

Explanation

The description provides a useful summary and explains the intended effect, but it omits the required Testing section, review trigger, and checklist. It also contains conflicting statements about whether the release group uses Bun.

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@teamleaderleo
teamleaderleo enabled auto-merge (squash) September 21, 2026 23:43
@teamleaderleo
teamleaderleo force-pushed the ci/guard-bun-preflight-only branch from 0020851 to 40ffdbd Compare September 22, 2026 00:09

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Actionable comments posted: 1


  • 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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Inline comments:
In @.github/workflows/ci-guards.yml:
- Line 137: Restrict the Bun setup condition to matrix.group == 'preflight'
only, removing the release alternative. Update the related regression assertion
to require the preflight-only condition and preserve Bun setup for both
preflight consumers.

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Comment thread .github/workflows/ci-guards.yml
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Superseded by #13486, which now targets main and carries this entire guard-cleanup stack as one two-file landing unit.

auto-merge was automatically disabled September 22, 2026 02:17

Pull request was closed

teamleaderleo added a commit that referenced this pull request Sep 22, 2026
teamleaderleo added a commit that referenced this pull request Sep 22, 2026
* test: cover Cloud display ownership and readiness gaps

* Enforce Cloud display provenance and independent guest displays

* Keep display creation compatible with baked Cloud images

* Fix guest display target wiring and session supervision

* Harden embedded display helper and Dock restore ownership

* Close Cloud display lifecycle gaps

* Harden display discovery and helper restart recovery

* Finish Cloud display build and readiness guards

* Preserve display state and bind guest listeners privately

* Invalidate display catalogs when VM state changes

* Preserve Dock display duplication identity

* Preserve Cloud display refresh and browser locations

* Run guest display service as the desktop user

* Align Ghostty submodule with current main

* Invalidate terminal Cloud navigation callbacks

* Keep guest display ports out of forwarded resources

* Complete additional display recovery paths

* Synchronize guest profile and slow-route readiness

* Finish guest display startup and restore routing

* Keep unresolved display restores retryable

* Fence guest discovery to provider lifetime

* test: cover display transport recovery and duplication state

* fix: preserve Cloud displays during transport recovery

* test: preserve display identity across browser reconfiguration

* fix: retain display identity across route reconfiguration

* test: cover route observation after display reconfiguration

* fix: retain Cloud restore lifecycle state

* test: drop Cloud provenance after external navigation

* fix: clear Cloud provenance on external browser navigation

* test: cover display catalog and readiness cancellation

* fix: fence display catalog and readiness lifecycles

* test: cover delayed display restore and scoped helpers

* fix: complete display restore and supervisor isolation

* fix: require discovered guest display resources

* test: cover guest component recovery

* fix: preserve Cloud provenance and supervise displays

* test: reject failed display catalog responses

* fix: fence display discovery by response and auth

* test: filter untrusted display restore targets

* fix: fence display restore targets and VM kind

* test: fence browser Cloud service identity

* test: exercise recovered display supervision

* fix: recover display supervisors and port identity

* test: recover scoped display process commands

* fix: recover scoped display processes by command

* test: cover Cloud restore and destination comment fixes

* fix: address Cloud display review comments

* test: cover display port ownership and recovery

* fix: harden Cloud display supervisor and route lifecycle

* test: stay within Swift file budget

* fix: sanitize display errors and readiness probes

* fix: restore Cloud resources in Dock scopes

* fix: recover global Dock projections and daemon readiness

* fix: preserve Dock connections across Cloud route changes

* fix: bound display startup and preserve duplicate URLs

* fix: defer Cloud activation for hidden restores

* fix: preserve ownership checks across latest main merge

* fix: remove duplicate projection query declarations

* fix: restore provider display lifecycle after main merge

* fix: use merged hostname route API

* fix: restore New Display hover button after main merge

The latest origin/main merge moved CloudTreeRowHoverButtons into its own
file, and the conflict resolution kept main's copy, which dropped the
displays-pool New Display button and its hasButtons entry. Re-apply them
in the new file, and restore the blank lines the resolution stripped from
SurfaceCatalog.swift so the PR diff stays limited to behavior changes.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix: keep SurfaceCatalog within its line budget

The blank lines restored in the previous commit put the file seven lines
over the Swift file-length budget, so drop them again.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* fix: route cloud desktop clicks through portal

* chore: keep cloud fix within file budgets

* #13531: retire and background-reap cold warm-slot task state

Squashed onto current main after #13530 merged.

* fix: separate terminal stream and viewport lease lifetimes

* fix: keep viewport lease across UI output stream churn

* ci: dispatch #13474 follow-up iOS test

* ci: remove temporary #13474 follow-up dispatcher

* ci: trim unused workflow-guard setup and duplicate capture work

Collapse #13483-#13486 onto the current split guard matrix.

* ci: run direct #13474 ownership test

* ci: remove temporary #13474 direct test workflow

* fix(iOS): preserve tagged App Group when signing supports it (#13541)

* fix(ios): preserve supported tagged App Groups

* ci: keep iOS-only tests off macOS runners

* ci: run tagged iOS signing regression on Linux

* ci: freeze legacy iOS test routing path

* fix(ios): harden tagged signing fallback detection

* fix(ios): fail closed on partial ASC signing credentials

* fix(ios): validate ASC key path before device signing

* chore(ios): report tagged device signing backend

* docs(ios): keep cheap regressions off macOS routing

* test(ios): bind fallback entitlements to retry build

* ci: catch nested iOS-only test routing footguns

* test(iOS): bind fallback entitlements to retry command

* fix(iOS): correct retry assertion pattern

* fix: keep cold-task cleanup moving past failures

* test: cover resilient cold-task cleanup

* fix(review): require proof for repaired findings

* iOS: keep the composer bar out of the home-indicator band when the terminal disconnects (#13471)

* iOS: add failing disconnected-composer-seat fixture and regression test (#13470)

CMUX_UITEST_WORKSPACE_DETAIL_DISCONNECTED=1 mounts a workspace shell whose
one retained terminal is Disconnected, with no Mac or sign-in; scenario
drop-after-focus starts connected, focuses the composer at t+2s (real
keyboard), and drops the Mac to unavailable at t+9s.

The new XCUITest rides the dock probe through the raise and the
blocked-input resign, waits for the settled keyboard-down rest, then
asserts the dock's constraint-resolved bottom edge leaves the whole bottom
safe area below it. On the iOS <=26 keyboard-guide seat the dock instead
rests at the raw screen bottom, so this test fails until the fix.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* iOS: floor the keyboard-guide dock seat at the bottom safe area (#13470)

With the keyboard up over a connected terminal, the Mac dropping to
unavailable blocks input, which resigns the keyboard. After that show->hide
cycle UIKeyboardLayoutGuide rests at the RAW host bottom instead of the
bottom safe area (usesBottomSafeArea notwithstanding), so the accessory
toolbar and composer bar land inside the home-indicator band -
permanently, because blocked input means no keyboard event ever re-seats
the guide.

Add a required dock.bottom <= host.bottom - resolvedBottomSafeAreaInset
floor, active only with the guide seat, and downgrade the guide equality to
999 so it yields exactly the clamped distance when the guide rests too low.
The floor is slack whenever the keyboard holds the guide higher, follows
the same resolved-inset sources as the plain seat, and deactivates with the
guide in the chrome-hidden state (whose dock parks at the raw bottom by
design). The iOS 27 notification seat already computes from the resolved
inset and is unaffected.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

* Split the release guard critical path (#13502)

* ci: split release guards into parallel groups

Squashed onto current main after #13501 merged.

* test: include split release groups in guard matrix contract

* test: include split release groups in guard matrix contract

* ci: skip Linux preflight when macOS is unrouted (#13550)

* ci: skip macOS preflight when macOS is unrouted

* test(ci): cover skipped macOS preflight routing

* test(ci): preserve preflight contract migration marker

* ci: install bashlex only in its release owner

* test: pin release-only bashlex ownership

* Speed up CI critical path and remove obsolete review gate

Start macOS validation after cheap static checks, remove the obsolete agent review gate workflow, and fix the stale iOS guard matrix route.

* ci: port guard setup ownership to split release groups

* test: pin split guard setup ownership

* CI: route tagged iOS entitlement guard to release-ios

* ci: route tagged iOS entitlement guard to release-ios

* test: own tagged iOS entitlement guard in release-ios

* ci(iOS): resolve manual test refs before checkout (#13566)

* ci(ios): resolve manual test refs to full SHAs

* test(ci): cover manual iOS short-SHA dispatches

* test(ci): fix iOS workflow job parser

* ci: run iOS dispatch-ref regression on Linux

* iOS: allow all photo library task attachments (#13441)

* iOS: allow all photo library task attachments

* iOS: export Foundation for recovery API

* iOS: accept video attachments in terminal composers

* iOS: show videos in composer photo pickers

* Clarify composer picker comments

* Keep photo library attachment picker unfiltered

* Bound Photos library attachment transfers

* Make Photos attachment timeout authoritative

* ci: route tagged iOS entitlement guard to release-ios

* Add structured iOS connectivity diagnostics to Axiom (#13459)

* Add structured iOS connectivity diagnostics to Axiom

* refactor: move telemetry helper to file scope

* refactor: keep diagnostic bounds in payload assembly

* fix: bound event surface telemetry

---------

Co-authored-by: Austin Wang <austinwang115@gmail.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
Co-authored-by: Abdulaziz Albahar <67667005+azooz2003-bit@users.noreply.github.com>
Co-authored-by: Lawrence Chen <54008264+lawrencecchen@users.noreply.github.com>
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