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Gate startup reconnect on paired Mac hydration - #13750
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📝 WalkthroughWalkthroughChangesThe reconnect API now accepts an optional hydration flag. When enabled, it waits for paired-Mac hydration before route selection. Concurrent loads share one task, and stored-Mac startup reconnect enables hydration. Tests cover blocked hydration and Iroh route selection. Paired-Mac reconnect hydration
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant CMUXMobileRootView
participant MobileShellComposite
participant DelayedTeamPairedMacStore
participant StoredIrohRoute
CMUXMobileRootView->>MobileShellComposite: reconnectActiveMacIfAvailable(hydratePairedMacs: true)
MobileShellComposite->>DelayedTeamPairedMacStore: load paired Macs
DelayedTeamPairedMacStore-->>MobileShellComposite: hydration completes
MobileShellComposite->>StoredIrohRoute: select stored Iroh route
Suggested reviewers: Merge Risk: 🟡 Moderate · up to Reconnect can miss paired Macs after an account or team change, and the new regression test can intermittently fail or stall. Fix both before merging. 🚥 Pre-merge checks | ✅ 23 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (23 passed)
Full details: Description checkExplanation The description clearly explains the problem, fix, and targeted validation. However, it omits the required Demo Video, Review Trigger, and Checklist sections. It also does not explain deterministic soak coverage or record the affected workload result for this iOS connectivity change. Resolution Add the missing template sections. Include a demo video or explain why one is not applicable, include the review-trigger block, complete the checklist, and document deterministic soak coverage or explain why existing coverage applies with the affected workload result. Full details: Docstring CoverageExplanation Docstring coverage is 14.29% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 7 functions across 3 files. (1 skipped: 1 too large.)
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In
`@Packages/iOS/CmuxMobileShell/Sources/CmuxMobileShell/MobileShellComposite.swift`:
- Around line 4135-4146: Invalidate paired-Mac loading at both signOut() and
currentTeamDidChange() by cancelling and clearing pairedMacLoadTask and its
associated token alongside pairedMacLoadGeneration. Update loadPairedMacs() to
assign a unique task token and only clear the task after completion when that
token still matches, preventing an older waiter from clearing a newer task.
In
`@Packages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/ReconnectRouteSelectionTests.swift`:
- Around line 135-141: Update the releaser task in ReconnectRouteSelectionTests
to coordinate with each blocked read explicitly: wait until a blocker is
enqueued, release it, then repeat for the next expected read. Remove the fixed
500-iteration Task.yield loop and use the store’s existing
synchronization/signaling mechanism so hydration and the subsequent reconnect
loadAll read are both released deterministically.
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📒 Files selected for processing (4)
Packages/iOS/CmuxMobileShell/Sources/CmuxMobileShell/MobileShellComposite.swiftPackages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/DelayedTeamPairedMacStore.swiftPackages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/ReconnectRouteSelectionTests.swiftPackages/iOS/CmuxMobileShellUI/Sources/CmuxMobileShellUI/CMUXMobileRootView.swift
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austinywang
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Sep 23, 2026
(cherry picked from commit 0f20b25)
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Problem
Startup reconnect could begin while the paired Mac records and per-computer connection methods were still hydrating. Empty in-memory state was then treated as missing pairing or route data.
Fix
Validation
swift test --filter ReconnectRouteSelectionTests/startupReconnectWaitsForPairedMacHydrationBeforeDialinggit diff --checkNeed help on this PR? Tag
@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Startup reconnect now waits for paired Mac hydration to finish before dialing, so an empty in-memory state is no longer mistaken for missing pairing or route data. Paired Mac loads are keyed by account/team scope and coalesced into one shared in-flight task per scope; a
forceRefreshwaits out any stale read before reloading so recent mutations are never masked by an older snapshot. Both startup hydration and the load itself are bounded by deadlines so a stalled store cannot hold the reconnect owner indefinitely or leave a shell with no load state.loadPairedMacs(forceRefresh:)coalesces concurrent loads per scope and re-reads after any in-flight read completes; callers that need the pairing snapshot now await the result and bail on failure instead of proceeding with stale state.forceRefresh: trueso reloads see freshly written data; the load failure paths also mark the shell's load state as failed instead of staying empty.hydratePairedMacs: trueand re-checks the stored-Mac route decision after hydration before dialing; a hydration failure is retried once.Written for commit 35a4ad4. Summary will update on new commits.
Summary by CodeRabbit