feat(mobile): show startup crashes in Settings → Diagnostics - #11540
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TestFlight and the stores strip the JavaScript error from a crash report, so a launch crash arrives as an opaque expo-updates ErrorRecovery abort. The same module writes the error and component stack to its persistent log before aborting. Read it on the next launch and show it under Settings → Diagnostics, with a copy-to-clipboard report for issues. Diagnosing build 56 needed a Mac paired to the phone; this makes the same information available on the phone. Co-Authored-By: Claude Code <noreply@anthropic.com>
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Co-Authored-By: Claude Code <noreply@anthropic.com>
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Included review availability: 6 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 10 reviews per hour. 📝 WalkthroughWalkthroughAdds mobile startup crash diagnostics. The app parses seven days of ChangesDiagnostics feature
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant SettingsDiagnosticsRouteScreen
participant ExpoUpdates
participant CrashLogModel
SettingsDiagnosticsRouteScreen->>ExpoUpdates: Read logs from the previous seven days
ExpoUpdates-->>SettingsDiagnosticsRouteScreen: Return log entries
SettingsDiagnosticsRouteScreen->>CrashLogModel: Parse startup crash records
CrashLogModel-->>SettingsDiagnosticsRouteScreen: Return sorted records
SettingsDiagnosticsRouteScreen->>CrashLogModel: Format the crash report
CrashLogModel-->>SettingsDiagnosticsRouteScreen: Return copyable report
Merge Risk: ⚪ Minimal · up to The Diagnostics screen handles unavailable logs safely, reads and formats startup crash records through consistent contracts, and is correctly connected to Settings. No merge-blocking issue remains. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 8 functions across 7 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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ApprovabilityVerdict: Not approved Macroscope's review found this PR not approvable — This adds a new Diagnostics screen and crash-report export workflow rather than a small isolated adjustment. It reads persistent startup logs and exposes full JavaScript error details for copying, including values that may require review before sharing. You can add or adjust custom eligibility rules. Learn more. |
Thread transfer impact✅ Thread transfer remains within every enforced ceiling.
Baseline: Scenario and decoded snapshot size10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.
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Inline comments:
In `@apps/mobile/src/features/diagnostics/SettingsDiagnosticsRouteScreen.tsx`:
- Around line 128-130: Update the user-facing guidance in
SettingsDiagnosticsRouteScreen and docs/user/install.md to remove the claim that
the diagnostic report excludes sensitive information, and instruct users to
review and redact the report before sharing it. Keep the existing
report-generation behavior unchanged.
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📒 Files selected for processing (8)
apps/mobile/src/Stack.tsxapps/mobile/src/components/AppSymbol.tsxapps/mobile/src/features/diagnostics/SettingsDiagnosticsRouteScreen.tsxapps/mobile/src/features/diagnostics/crash-log-model.test.tsapps/mobile/src/features/diagnostics/crash-log-model.tsapps/mobile/src/features/settings/SettingsRouteScreen.tsxapps/mobile/src/features/settings/components/settings-sheet-targets.tsdocs/user/install.md
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Co-Authored-By: Claude Code <noreply@anthropic.com>
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Follow-up to #11537. Diagnosing the build 56 launch crash needed a Mac paired to the phone: TestFlight's crash report strips the JavaScript error, and only expo-updates' own persistent log had it. This surfaces that log in the app.
Updates.readLogEntriesAsync(7-day window, the log's retention) and listsJSRuntimeErrorentries written by ErrorRecovery: timestamp, the JS error, and the first frames of the component stack with the build path stripped. Copy crash report puts the app version/build and every crash's full detail on the clipboard for pasting into an issue.parseStartupCrashRecords/formatStartupCrashReportincrash-log-model.tsare pure and tested against the verbatim entry expo-updates wrote for the build 56 crash.Updates.isEnabled === false; the screen says the log is unavailable there instead of pretending it is empty.stethoscopegets a Tabler mapping so the row has an Android icon.docs/user/install.mdtelling users where to find the report.The report contains the app version, the error message, and the component stack. Error messages are arbitrary text and can quote app values, so the screen and docs tell users to review it before sharing.
Verification
vp test run apps/mobile/src/features/diagnostics/crash-log-model.test.ts— 5 passing, including the real entry from the device.tsc --noEmitand lint clean forapps/mobile.Not verified on device: the populated list needs a TestFlight/store build, since dev clients report
isEnabled === falseand the empty state is all a simulator can show. The screen is built from the sameSettingsSection/row pieces as Client Storage, so layout risk is low, but a real-build screenshot would be welcome from the next TestFlight round.Claude Fable 5 via Claude Code.
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