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Matthew Raymer eb1fc9f220 feat(docs): complete P2.6 type safety cleanup and P2.7 system invariants

P2.6: Type Safety Cleanup
- Replaced 'any' return types in vite-plugin.ts with concrete types (UserConfig, transform return type)
- Documented TypeScript mixin 'any[]' exception in PlatformServiceMixin.ts
- Audit confirmed: zero 'any' in codebase except documented TS mixin limitation
- All external boundaries use 'unknown', all data payloads use 'Record<string, unknown>'

P2.7: System Invariants Documentation
- Created SYSTEM_INVARIANTS.md documenting all 6 enforced invariants
- Added to docs/00-INDEX.md under Policy & Contracts section
- Each invariant includes: What, Why, How, Where

Progress Docs Updates:
- Updated 00-STATUS.md: marked P2.6/P2.7 complete, added type safety invariant note
- Updated 01-CHANGELOG-WORK.md: added 2025-12-22 entries for P2.6/P2.7
- Updated 03-TEST-RUNS.md: added P2.6 type safety audit test run
- Updated P2-DESIGN.md: marked P2.6 acceptance criteria complete
- Updated SYSTEM_INVARIANTS.md: added Type Safety Notes section

Baseline Tag:
- Created v1.0.11-p0-p1.4-p1.5-p2.6-p2.7-complete

TypeScript compilation: ✅ PASSES
Build: ✅ PASSES
CI: ✅ All checks pass

2025-12-22 10:56:00 +00:00

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iOS vs Android Feature Parity Matrix

Purpose: Feature-by-feature comparison of iOS and Android implementations to track parity gaps.
Owner: Development Team
Last Updated: 2025-12-22
Status: active

Storage & Persistence

Feature	Android	iOS	Notes
Persistent state	✅ SQLite (Room)	✅ CoreData + SQLite	Both implemented
Schema versioning	✅ Room migrations	⚠️ Partial	iOS has CoreData auto-migration, but explicit versioning may be needed
State survives app restart	✅ Yes	✅ Yes	Both implemented
State survives OS kill	✅ Yes	✅ Yes	Both implemented
State survives reboot	✅ Yes	N/A	iOS handles notifications automatically

Notification Scheduling

Feature	Android	iOS	Notes
Exact alarms	✅ AlarmManager	N/A	iOS uses UNUserNotificationCenter
Daily rollover	✅ Automatic	✅ Automatic	Both implemented (iOS uses NotificationCenter pattern)
Schedule persistence	✅ Database	✅ UNUserNotificationCenter	iOS OS-guaranteed
Next notification retrieval	✅ getNotificationStatus()	✅ getNotificationStatus()	Both implemented

Recovery & Resilience

Feature	Android	iOS	Notes
App launch recovery	✅ ReactivationManager	✅ ReactivationManager	Both implemented with persistence
Boot recovery	✅ BootReceiver	N/A	iOS handles automatically
Missed notification detection	✅ Yes	✅ Yes	Both implemented with persistent state
Recovery logging	✅ Comprehensive	✅ Comprehensive	Both have good logging
Invalid data recovery	✅ Tested (TEST 4)	✅ Tested (RecoveryTests)	Both have automated recovery tests
Rollover idempotency	✅ Tested	✅ Tested	Both verify duplicate rollover prevention
Migration safety	✅ Tested	✅ Tested	Both test unknown/missing fields

Background Execution

Feature	Android	iOS	Notes
Background fetch	✅ WorkManager	✅ BGTaskScheduler	Both implemented
Background notification	✅ WorkManager	✅ BGTaskScheduler	Both implemented
Execution time limits	✅ Flexible	⚠️ ~30 seconds	iOS has strict limits
Battery optimization handling	✅ Documented	N/A	iOS handles automatically

Error Handling

Feature	Android	iOS	Notes
Error codes	✅ Structured	✅ Structured	Both have error codes
Error recovery	✅ Yes	✅ Yes	Both handle errors gracefully
Invalid data handling	✅ Recovery tested	⚠️ Input validation only	GAP - iOS needs recovery testing

Testing

Feature	Android	iOS	Notes
Unit tests	✅ Yes	⚠️ Partial	iOS has some tests
Integration tests	✅ Yes	⚠️ Partial	iOS has some tests
Test automation	✅ High	⚠️ Medium	iOS has manual components
Recovery testing	✅ Yes	✅ Yes	Both have automated recovery tests (DailyNotificationRecoveryTests.swift)

Summary

Critical Gaps (P0)

None - All critical gaps addressed:

✅ iOS rollover implemented (NotificationCenter pattern)
✅ iOS recovery testing implemented (DailyNotificationRecoveryTests.swift)
✅ iOS persistence confirmed (CoreData + SQLite)

Important Gaps (P1)

Schema Versioning - iOS has CoreData auto-migration, but explicit versioning strategy may be needed
Test Automation - iOS tests can be run via xcodebuild, but CI integration may need macOS runners

Nice-to-Have (P2)

Combined Edge Case Tests - DST boundary + duplicate delivery + cold start combined scenario
OS Reboot Testing - True OS reboot scenarios (iOS handles automatically, but explicit testing may be valuable)

Last Updated: 2025-12-16
Next Review: After PHASE 2 completion

4.0 KiB Raw Blame History