nightly: per-architecture LZMA DMGs (205 MB → ~80 MB download) - #11661
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The nightly DMG had grown to 205 MB (507 MB installed) because every binary in the bundle (app, CLI, cmux-tui, cmux-cua, ghostty helper, sidecar) shipped both arm64 and x86_64 slices, and the image used LZFSE. Build once, thin twice. The sign job is now a matrix over arm64, x86_64, and (until 2026-10-01) universal. Each variant is cut from the same universal Xcode build with scripts/thin-app-bundle.sh, signed, notarized, and packaged as cmux-nightly-macos-<variant>.dmg with its own appcast-<variant>.xml. A new publish-nightly job assembles the legacy cmux-nightly-macos.dmg / appcast.xml names (universal during the transition, x86_64 afterwards), publishes the release, and uploads all feeds to R2. The DMG is re-encoded to ULMO (LZMA) after create-dmg, which alone is about a quarter smaller than the LZFSE image for the same bundle. CmuxUpdater resolves nightly feeds per architecture: a legacy appcast.xml or appcast-universal.xml nightly URL becomes appcast-<arch>.xml, where arch is the machine's native architecture (Rosetta-translated x86_64 resolves to arm64). This is how existing universal installs migrate onto the thin build, and how the manual-download recovery offers the right DMG. Claude-Session: https://claude.ai/code/session_01P829qGa8WV6USyXooefukM
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📝 WalkthroughWalkthroughNightly macOS releases now produce arm64 and x86_64 artifacts from one universal build. Updater resolution, packaging, validation, release publication, documentation, and web downloads use architecture-specific files with legacy compatibility names. ChangesArchitecture-aware updater
Bundle processing and release pipeline
Download surfaces
Estimated code review effort: 4 (Complex) | ~60 minutes Merge Risk: 🟡 Moderate · up to This PR changes nightly artifacts and update routing by architecture, but the current validation can accept a universal sidecar where a thin artifact is required, potentially producing incorrectly packaged downloads. A Rosetta-detection failure may also select the wrong update feed, while partial feed publication can temporarily split users across builds; these issues should be fixed or explicitly accepted before merge. Sequence Diagram(s)sequenceDiagram
participant DecideJob
participant BuildSignNotarize
participant PublishNightly
participant R2
DecideJob->>BuildSignNotarize: Compute arm64, x86_64, and legacy variants
BuildSignNotarize->>BuildSignNotarize: Thin, sign, notarize, and generate appcasts
BuildSignNotarize->>PublishNightly: Upload variant DMGs and appcasts
PublishNightly->>PublishNightly: Assemble legacy release names
PublishNightly->>R2: Upload all appcast files
Suggested reviewers: 🚥 Pre-merge checks | ✅ 14 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (14 passed)
Full details: Cmux Swift Actor IsolationExplanation PASS — The production Swift diff adds only immutable Full details: Cmux Swift Blocking RuntimeExplanation PASS: The PR's production Swift changes only add architecture detection and URL-resolution logic in Full details: Cmux Browser Automation Off-MainExplanation PASS: This pull request does not change browser socket automation. The diff against Full details: Cmux Expensive Synchronous LoadExplanation PASS: The PR's production Swift diff only adds architecture-aware URL string resolution, a single Rosetta-detection Full details: Cmux Cache Substitution CorrectnessExplanation PASS: The production Swift changes only add architecture-aware nightly feed and manual-download URL resolution. The changed TypeScript file only changes nightly download links. The PR does not replace an authoritative read with a cached or opportunistic value, and it does not change a persistence, history, undo, or snapshot path. Therefore the cold-cache and stale-cache conditions in the custom check do not apply. Full details: Cmux No Hacky SleepsExplanation PASS: The PR adds no fixed sleep, timer, polling, or wall-clock wait to covered production shell/runtime code. The only Full details: Cmux Algorithmic ComplexityExplanation PASS: The PR does not introduce a prohibited algorithmic shape. Full details: Cmux Swift ConcurrencyExplanation PASS. The PR's changed Swift files add synchronous architecture/feed resolution and recovery logic plus tests. The diff introduces no Full details: Cmux Swift `@Concurrent`Explanation PASS: The feature diff adds or changes only synchronous Swift APIs and tests. Full details: Cmux Swift Package BoundariesExplanation The PR's changed production Swift is confined to the existing Full details: Description checkExplanation The description explains what changed, why it changed, implementation details, measured results, testing, and manual verification. It does not reproduce the template headings or include the checklist, review-trigger block, or demo video, but the core required information is present.
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Inline comments:
In @.github/workflows/nightly.yml:
- Line 63: Update the publishUniversal comparison in the workflow so
legacyUniversalUntil itself is included, preserving universal artifact
publication through October 1, 2026.
Apply the same fix in `@tests/test_nightly_universal_build.sh` around lines 272 -
275: The current test does not verify which legacy artifact is selected at or
around the transition date.
In `@Packages/macOS/CmuxUpdater/Sources/CmuxUpdater/UpdateHostArchitecture.swift`:
- Line 19: Update the architecture selection around isRosettaTranslated() so
detection failure is represented explicitly rather than treated as false; when
the authoritative Rosetta status is unavailable, suppress architecture-specific
update routing, while preserving .arm64 for confirmed translation and .x86_64
for confirmed non-translation.
In `@web/app/`[locale]/(landing)/nightly/page.tsx:
- Around line 90-95: Move the “Apple silicon” and “Intel” labels in the nightly
page to next-intl by adding stable ARM64 and Intel translation keys to the
locale catalog for every supported locale, then retrieve them through the page’s
existing translation function t(...).
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.github/workflows/ci.yml.github/workflows/nightly.ymlPackages/macOS/CmuxUpdater/Sources/CmuxUpdater/UpdateFeedResolver.swiftPackages/macOS/CmuxUpdater/Sources/CmuxUpdater/UpdateHostArchitecture.swiftPackages/macOS/CmuxUpdater/Sources/CmuxUpdater/UpdateManualDownloadRecovery.swiftPackages/macOS/CmuxUpdater/Tests/CmuxUpdaterTests/InstallWatchdogTests.swiftPackages/macOS/CmuxUpdater/Tests/CmuxUpdaterTests/UpdateFeedResolverTests.swiftREADME.ar.mdREADME.bs.mdREADME.da.mdREADME.de.mdREADME.es.mdREADME.fr.mdREADME.it.mdREADME.ja.mdREADME.km.mdREADME.ko.mdREADME.mdREADME.no.mdREADME.pl.mdREADME.pt-BR.mdREADME.ru.mdREADME.th.mdREADME.tr.mdREADME.uk.mdREADME.vi.mdREADME.zh-CN.mdREADME.zh-TW.mdscripts/ci/notarize-nightly-dmg.shscripts/prune_nightly_release_assets.pyscripts/smoke-launch-macos-app.shscripts/thin-app-bundle.shtests/test_nightly_universal_build.shtests/test_notarize_nightly_dmg.shtests/test_thin_app_bundle.shweb/app/[locale]/(landing)/nightly/page.tsx
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Thinned nightly bundles carry one architecture, so the sidecar check inside sign-cmux-bundle.sh must not assume universal. Derive the expected slices from the signed main binary and report which slice is missing instead of failing silently. Claude-Session: https://claude.ai/code/session_01P829qGa8WV6USyXooefukM
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Inline comments:
In `@scripts/verify-diff-sidecar-artifact.sh`:
- Line 40: Update the architecture validation around lipo in the sidecar
verification script to compare normalized actual architecture slices with the
requested set, rejecting sidecars containing extra slices while preserving valid
exact matches. Add a test covering a universal sidecar supplied for a
single-architecture request.
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scripts/sign-cmux-bundle.shscripts/verify-diff-sidecar-artifact.sh
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Three sign variants each re-downloaded the rolling latest/ cmux-tui slices and one lost the race against a concurrent cmux-tui publish (sha256 mismatch). Fetch slices from the immutable commit-addressed prefix the manifest names, and bundle the client in the build job so every variant carries the same build. Claude-Session: https://claude.ai/code/session_01P829qGa8WV6USyXooefukM
…labels Review follow-ups: publish the universal legacy build through the stated date inclusive; make the diff sidecar verifier require exactly the requested slices instead of at least them; move the Apple silicon and Intel labels on the nightly page into the locale catalog.
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b2a984e cloud: run the coderouter edge probe after the create response (manaflow-ai#11771) 47b2828 test(tui): include machine usage in active event inventory (manaflow-ai#11764) 8fa163d cloud: minimal create path, 20260903b devbox ladder as defaults, Server-Timing per stage (manaflow-ai#11756) ddb686c nightly: per-architecture LZMA DMGs (manaflow-ai#11661) 6cd4765 Cloud VMs: trace ids end to end, every error to Sentry and PostHog, latency on every request (manaflow-ai#11755) # Conflicts: # .github/workflows/ci.yml # .github/workflows/nightly.yml
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cmux NIGHTLY was a 205 MB download and 507 MB installed: every bundled binary carried both arm64 and x86_64 slices, and the DMG used LZFSE.
This builds once and thins per architecture. The sign job becomes a matrix over
arm64,x86_64, and (until 2026-10-01)universal; each variant is cut from the same universal Xcode build withscripts/thin-app-bundle.sh, signed, notarized, and packaged ascmux-nightly-macos-<variant>.dmgwith its ownappcast-<variant>.xml. A newpublish-nightlyjob assembles the legacycmux-nightly-macos.dmg/appcast.xmlnames (universal during the transition, x86_64 afterwards), publishes the release, and uploads every feed to R2. The DMG is re-encoded to ULMO (LZMA) aftercreate-dmg. cmux-tui is bundled once in the build job and fetched from its immutable commit prefix, which removes a race against concurrent cmux-tui publishes.CmuxUpdaterresolves nightly feeds per architecture: a legacyappcast.xmlnightly URL becomesappcast-<arch>.xmlfor the machine's native architecture (Rosetta-translated x86_64 resolves to arm64). Existing universal installs migrate onto the thin build on their next update, and manual-download recovery offers the matching DMG.Measured from the branch dispatch https://github.com/manaflow-ai/cmux/actions/runs/33638834498 (signed, notarized, smoke-launched; x86_64 launched through Rosetta on the arm64 runner):
Tests:
tests/test_thin_app_bundle.sh(new, runs inrelease-build),tests/test_notarize_nightly_dmg.sh(LZMA conversion ordering and format check),tests/test_nightly_universal_build.sh(updated to the per-variant shape),CmuxUpdaterpackage tests (91 passing, 6 new resolver and recovery cases).https://claude.ai/code/session_01P829qGa8WV6USyXooefukM
Summary by CodeRabbit
New Features
Bug Fixes
Tests