Sage/.planning/phases/01-authentication/01-02-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	duration	completed
01-authentication	02	auth	dart flutter authentication clean-architecture repository-pattern error-handling	phase plan provides 01-authentication 01 Flutter project with Supabase integration	AuthUser data model for user representation Custom exception hierarchy for authentication errors AuthRepository interface for auth operations abstraction	01-03 02-01 03-01	added patterns clean-architecture repository-pattern factory-constructors exception-hierarchy	created modified lib/features/authentication/data/models/auth_user.dart lib/core/errors/auth_exceptions.dart lib/features/authentication/domain/repositories/auth_repository.dart	AuthUser extends Supabase User with fromSupabase() factory for clean conversion Comprehensive exception hierarchy with specific types for each auth error scenario AuthRepository interface provides full auth API including OAuth and profile management AuthExceptionFactory maps Supabase errors to custom exceptions with user-friendly messages	Pattern 1: Factory constructors for data model conversion from external sources Pattern 2: Exception factory pattern for mapping external errors to internal types Pattern 3: Abstract repository interface following clean architecture principles	30 min	2026-01-28

Phase 1 Plan 2: Authentication Models and Interfaces Summary

AuthUser model with Supabase integration, comprehensive exception hierarchy, and clean repository interface for authentication operations

Performance

• Duration: 30 min
• Started: 2026-01-28T14:06:15Z
• Completed: 2026-01-28T14:37:00Z
• Tasks: 3
• Files modified: 4

Accomplishments

• Created AuthUser data model with proper null safety and Supabase integration
• Implemented comprehensive custom exception hierarchy for all authentication scenarios
• Defined complete AuthRepository interface with full authentication capabilities
• Established clean architecture patterns for data and domain layers

Task Commits

Each task was committed atomically:

1. Task 1: Create AuthUser model - c45bb22 (feat)
2. Task 2: Create custom auth exceptions - b46cabe (feat)
3. Task 3: Create AuthRepository interface - 06e3ea4 (feat)
4. Task 4: Fix compilation errors - 58f2b5b (fix)

Plan metadata: (will be committed with planning docs)

Files Created/Modified

• lib/features/authentication/data/models/auth_user.dart - AuthUser data model with Supabase conversion factory
• lib/core/errors/auth_exceptions.dart - Custom exception hierarchy with factory for error mapping
• lib/features/authentication/domain/repositories/auth_repository.dart - Abstract repository interface for auth operations

Decisions Made

• AuthUser wraps Supabase User to maintain clean separation between data sources and domain models
• Exception hierarchy provides specific types for each authentication failure scenario
• AuthRepository interface includes comprehensive methods including OAuth, profile management, and session handling
• AuthExceptionFactory converts Supabase errors to user-friendly messages with proper error codes
• Used factory constructors for consistent data model conversion patterns

Deviations from Plan

Auto-fixed Issues

1. [Rule 1 - Bug] Fixed DateTime parsing in AuthUser.fromSupabase()

• Found during: Task 3 (AuthRepository interface creation)
• Issue: Supabase User timestamp fields couldn't be directly assigned to DateTime type
• Fix: Used DateTime.tryParse() with null safety handling for createdAt and lastSignInAt fields
• Files modified: lib/features/authentication/data/models/auth_user.dart
• Verification: Flutter analysis passes, no type assignment errors
• Committed in: 58f2b5b (Task 4 commit)

2. [Rule 3 - Blocking] Fixed import path in AuthRepository

• Found during: Task 3 (AuthRepository interface creation)
• Issue: Relative import path to auth_exceptions.dart was incorrect
• Fix: Updated import path to reach core/errors directory correctly
• Files modified: lib/features/authentication/domain/repositories/auth_repository.dart
• Verification: Import resolves correctly, compilation succeeds
• Committed in: 58f2b5b (Task 4 commit)

3. [Rule 2 - Missing Critical] Added UnknownAuthException for error factory

• Found during: Task 2 (Custom auth exceptions creation)
• Issue: AuthExceptionFactory tried to instantiate abstract AuthException class for unknown errors
• Fix: Added UnknownAuthException class extending AuthException for fallback error cases
• Files modified: lib/core/errors/auth_exceptions.dart
• Verification: AuthExceptionFactory now compiles without instantiation errors
• Committed in: 58f2b5b (Task 4 commit)

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Total deviations: 3 auto-fixed (1 bug, 1 missing critical, 1 blocking) Impact on plan: All fixes were necessary for correct compilation and functionality. No scope creep.

Issues Encountered

• Flutter/Dart not in system PATH required adding Flutter bin directory to PATH for analysis
• DateTime type conversion from Supabase User fields required safe parsing with null checks
• Abstract AuthException class couldn't be instantiated, requiring concrete fallback class

User Setup Required

None - no external service configuration required.

Next Phase Readiness

Authentication domain foundation is established with:

• Clean AuthUser model ready for Supabase integration
• Comprehensive error handling system for all auth scenarios
• Complete repository interface ready for implementation

Ready for Phase 1 Plan 3: Supabase Authentication Implementation.

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Phase: 01-authentication Completed: 2026-01-28