docs(01-02): complete authentication models and interfaces plan
Tasks completed: 3/3 - AuthUser data model with Supabase integration - Custom authentication exceptions with comprehensive error handling - AuthRepository interface defining all authentication operations SUMMARY: .planning/phases/01-authentication/01-02-SUMMARY.md
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Dani B
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# Sage Project State
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# Sage Project State
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**Last updated:** 2026-01-27
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**Last updated:** 2026-01-28
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**Status:** Roadmap complete, ready for Phase 1 planning
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**Status:** Phase 1 in progress
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---
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## Current Focus
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## Current Position
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**Phase:** Roadmap created (not yet executing phases)
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Phase: 1 of 12 (Authentication)
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**Action:** Ready for `/gsd:plan-phase 1` to begin Phase 1 (Auth & Account Basics) planning
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Plan: 2 of 3 in current phase
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Status: In progress
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Last activity: 2026-01-28 - Completed 01-02-PLAN.md
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Progress: █████░░░░░░░░░░░░░░░ 17%
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## Session Context
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## Session Context
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**This session:**
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**This session:**
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- Analyzed PROJECT.md, REQUIREMENTS.md, research/SUMMARY.md
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- Completed Phase 1 Plan 02 (Authentication Models)
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- Derived 12-phase structure from 62 v1 requirements
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- Created AuthUser data model with Supabase integration
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- Created full ROADMAP.md with success criteria, dependencies, mapping
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- Implemented comprehensive custom exception hierarchy
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- Created STATE.md project tracking document
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- Defined AuthRepository interface with full authentication capabilities
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- Updated REQUIREMENTS.md traceability table
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- Established clean architecture patterns for authentication
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**Tokens used:** ~24K (analysis + writing)
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**Tokens used:** ~30K (analysis + writing)
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**Files created/updated:**
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**Files created/updated:**
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- `.planning/ROADMAP.md` ✓ (12 phases, 62 requirements, 100% coverage)
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- `.planning/phases/01-authentication/01-02-SUMMARY.md` ✓ (authentication models summary)
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- `.planning/STATE.md` ✓ (project state tracking)
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- `lib/features/authentication/data/models/auth_user.dart` ✓ (AuthUser data model)
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- `.planning/REQUIREMENTS.md` ✓ (traceability table updated)
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- `lib/core/errors/auth_exceptions.dart` ✓ (custom exception hierarchy)
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- `lib/features/authentication/domain/repositories/auth_repository.dart` ✓ (auth repository interface)
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---
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*State document created: 2026-01-27*
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*State document created: 2026-01-27*
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*Roadmap approved for planning: No (awaiting user confirmation)*
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*Phase 1 Plan 1 completed: 2026-01-28*
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---
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phase: 01-authentication
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plan: 02
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subsystem: auth
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tags: [dart, flutter, authentication, clean-architecture, repository-pattern, error-handling]
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# Dependency graph
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requires:
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- phase: 01-authentication
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plan: 01
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provides: Flutter project with Supabase integration
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provides:
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- AuthUser data model for user representation
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- Custom exception hierarchy for authentication errors
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- AuthRepository interface for auth operations abstraction
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affects: [01-03, 02-01, 03-01]
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# Tech tracking
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tech-stack:
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added: []
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patterns: [clean-architecture, repository-pattern, factory-constructors, exception-hierarchy]
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key-files:
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created:
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- lib/features/authentication/data/models/auth_user.dart
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- lib/core/errors/auth_exceptions.dart
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- lib/features/authentication/domain/repositories/auth_repository.dart
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modified: []
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key-decisions:
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- "AuthUser extends Supabase User with fromSupabase() factory for clean conversion"
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- "Comprehensive exception hierarchy with specific types for each auth error scenario"
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- "AuthRepository interface provides full auth API including OAuth and profile management"
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- "AuthExceptionFactory maps Supabase errors to custom exceptions with user-friendly messages"
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patterns-established:
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- "Pattern 1: Factory constructors for data model conversion from external sources"
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- "Pattern 2: Exception factory pattern for mapping external errors to internal types"
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- "Pattern 3: Abstract repository interface following clean architecture principles"
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# Metrics
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duration: 30 min
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completed: 2026-01-28
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---
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# Phase 1 Plan 2: Authentication Models and Interfaces Summary
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**AuthUser model with Supabase integration, comprehensive exception hierarchy, and clean repository interface for authentication operations**
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## Performance
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- **Duration:** 30 min
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- **Started:** 2026-01-28T14:06:15Z
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- **Completed:** 2026-01-28T14:37:00Z
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- **Tasks:** 3
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- **Files modified:** 4
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## Accomplishments
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- Created AuthUser data model with proper null safety and Supabase integration
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- Implemented comprehensive custom exception hierarchy for all authentication scenarios
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- Defined complete AuthRepository interface with full authentication capabilities
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- Established clean architecture patterns for data and domain layers
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## Task Commits
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Each task was committed atomically:
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1. **Task 1: Create AuthUser model** - `c45bb22` (feat)
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2. **Task 2: Create custom auth exceptions** - `b46cabe` (feat)
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3. **Task 3: Create AuthRepository interface** - `06e3ea4` (feat)
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4. **Task 4: Fix compilation errors** - `58f2b5b` (fix)
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**Plan metadata:** (will be committed with planning docs)
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## Files Created/Modified
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- `lib/features/authentication/data/models/auth_user.dart` - AuthUser data model with Supabase conversion factory
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- `lib/core/errors/auth_exceptions.dart` - Custom exception hierarchy with factory for error mapping
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- `lib/features/authentication/domain/repositories/auth_repository.dart` - Abstract repository interface for auth operations
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## Decisions Made
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- AuthUser wraps Supabase User to maintain clean separation between data sources and domain models
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- Exception hierarchy provides specific types for each authentication failure scenario
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- AuthRepository interface includes comprehensive methods including OAuth, profile management, and session handling
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- AuthExceptionFactory converts Supabase errors to user-friendly messages with proper error codes
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- Used factory constructors for consistent data model conversion patterns
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## Deviations from Plan
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### Auto-fixed Issues
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**1. [Rule 1 - Bug] Fixed DateTime parsing in AuthUser.fromSupabase()**
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- **Found during:** Task 3 (AuthRepository interface creation)
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- **Issue:** Supabase User timestamp fields couldn't be directly assigned to DateTime type
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- **Fix:** Used DateTime.tryParse() with null safety handling for createdAt and lastSignInAt fields
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- **Files modified:** lib/features/authentication/data/models/auth_user.dart
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- **Verification:** Flutter analysis passes, no type assignment errors
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- **Committed in:** 58f2b5b (Task 4 commit)
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**2. [Rule 3 - Blocking] Fixed import path in AuthRepository**
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- **Found during:** Task 3 (AuthRepository interface creation)
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- **Issue:** Relative import path to auth_exceptions.dart was incorrect
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- **Fix:** Updated import path to reach core/errors directory correctly
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- **Files modified:** lib/features/authentication/domain/repositories/auth_repository.dart
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- **Verification:** Import resolves correctly, compilation succeeds
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- **Committed in:** 58f2b5b (Task 4 commit)
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**3. [Rule 2 - Missing Critical] Added UnknownAuthException for error factory**
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- **Found during:** Task 2 (Custom auth exceptions creation)
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- **Issue:** AuthExceptionFactory tried to instantiate abstract AuthException class for unknown errors
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- **Fix:** Added UnknownAuthException class extending AuthException for fallback error cases
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- **Files modified:** lib/core/errors/auth_exceptions.dart
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- **Verification:** AuthExceptionFactory now compiles without instantiation errors
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- **Committed in:** 58f2b5b (Task 4 commit)
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---
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**Total deviations:** 3 auto-fixed (1 bug, 1 missing critical, 1 blocking)
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**Impact on plan:** All fixes were necessary for correct compilation and functionality. No scope creep.
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## Issues Encountered
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- Flutter/Dart not in system PATH required adding Flutter bin directory to PATH for analysis
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- DateTime type conversion from Supabase User fields required safe parsing with null checks
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- Abstract AuthException class couldn't be instantiated, requiring concrete fallback class
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## User Setup Required
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None - no external service configuration required.
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## Next Phase Readiness
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Authentication domain foundation is established with:
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- Clean AuthUser model ready for Supabase integration
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- Comprehensive error handling system for all auth scenarios
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- Complete repository interface ready for implementation
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Ready for Phase 1 Plan 3: Supabase Authentication Implementation.
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---
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*Phase: 01-authentication*
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*Completed: 2026-01-28*
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