Archery Apprentice Documentation

agent-2-aam

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Agent 2 - AAM (Archery Apprentice Modules)

Agent: AAM (Archery Apprentice Modules) Specialization: Data layer migrations, module architecture, DAO/Entity implementations Status: Active

Role & Responsibilities

Agent 2 (AAM) specializes in:

  • DAO Migrations: Migrating Room DAOs from androidApp to shared:database
  • Entity Migrations: Migrating Room entities for KMP compatibility
  • Module Architecture: Shared module design and implementation
  • Data Layer Patterns: Repository patterns, database patterns
  • Test-Driven Development: Comprehensive test coverage for data layer
  • KMP Compatibility: Ensuring zero Android dependencies in shared code

Recent Accomplishments

Week 12 Days 3-5 (2025-10-31): RoundDao + TournamentScoreCacheDao Migration

  • RoundDao migrated (872 lines, 53 methods) - 37% of all DAO code
  • TournamentScoreCacheDao migrated (277 lines, 12 methods)
  • 2 entities migrated (RoundEntity, TournamentScoreCacheEntity)
  • 2 P0 bugs fixed (default parameter anti-pattern in EquipmentStatsDao + RoundDao)
  • Quality: ⭐⭐⭐⭐⭐ (Agent 1 architectural review: 4.8/5, Agent 3 validation: 5/5)
  • Key Achievement: Week 11+12 DAO migration 100% complete (19 of 19 DAOs)

Week 12 Day 0-2 (2025-10-29): Tournament & Scoring DAO Migration (Initial)

  • 5 DAOs migrated (618 lines, 84 methods)
  • 3 entities migrated (~215 lines)
  • DEX blocker resolved (Week 11 pattern restored)
  • Quality: ⭐⭐⭐⭐⭐ (Agent 3 validation)

Week 11 (2025-10-28): Equipment DAO Migration (PR #187)

  • 11 equipment DAOs migrated to shared:database
  • ArcheryKmpDatabase created
  • Established Week 11 pattern (entities commented in ArcheryAppDatabase)
  • Quality: ⭐⭐⭐⭐⭐ (Agent 3 validation)

Week 9 (2025-10-26 to 2025-10-27): Serialization & Entity Migrations

  • Days 1-3: Gson → kotlinx.serialization migration
    • 25+ models migrated
    • 4 TypeConverters migrated
    • Polymorphic sealed class handling (SessionParticipant)
    • PR #162 MERGED (net -493 lines)
  • Days 4-5: Entity Date→Long migrations
    • 3 entities migrated (ArrowEquipmentSnapshot, EquipmentStatsCache, BowSetupEquipment)
    • 46+ tests updated
    • Bonus: Fixed MapConverter empty string bug
  • Quality: ⭐⭐⭐⭐⭐ (Zero test failures on 2051 tests)

Key Technical Achievements

DAO Migration Excellence (Week 11-12)

Scope:

  • 19 DAOs migrated (100% of planned migrations)
  • ~3,326 lines of DAO code
  • 353 methods migrated
  • Zero test failures (4,090 tests, 100% pass rate)

Complex Migrations:

  • RoundDao: 872 lines, 53 methods (largest DAO, 37% of all DAO code)
  • BowSetupDao: 200 lines, 28 methods (complex queries)
  • TournamentParticipantDao: 239 lines, 28 methods (join queries)

Quality Metrics:

  • 100% test pass rate maintained
  • 81%+ code coverage
  • Zero Android dependencies in shared code
  • Agent 1 + Agent 3 validation: ⭐⭐⭐⭐⭐

Serialization Migration (Week 9)

Technical Highlights:

  • Polymorphic sealed class serialization (SessionParticipant + 4 implementations)
  • Perfect @SerialName discrimination
  • Gson→kotlinx.serialization compatibility tests
  • TypeConverter migrations (ListString, Map, SessionParticipant, Equipment)
  • Zero serialization failures

Bug Discovery & Resolution

P0 Default Parameter Anti-Pattern (Week 12):

  • Issue: Clock.System.now() in default parameters evaluates once at class load
  • Found in: EquipmentStatsDao (6 methods), RoundDao (1 method)
  • Impact: Stale timestamps breaking cache validity and audit trails
  • Resolution: Removed default parameters, explicit timestamps at call sites
  • Prevention: Enhanced semantic validation protocol (Agent 3 collaboration)

DEX Limit Blocker (Week 12):

  • Issue: DEX limit exceeded (75,742 methods)
  • Root Cause: Deviated from Week 11 pattern
  • Resolution: Restored Week 11 pattern (comment entities in ArcheryAppDatabase)
  • Result: DEX reduced to ~65K methods

MapConverter Bug (Week 9):

  • Issue: Empty string handling crashed
  • Resolution: Now returns emptyMap()
  • Coverage: Added 8 edge case tests

Collaboration Highlights

With Agent 3 (AAA - Validation)

Week 12 Enhanced Validation Protocol:

  • Agent 3 developed semantic code review checklist
  • Caught RoundDao default parameter bug immediately
  • Would have caught EquipmentStatsDao bug if applied earlier
  • Success: Protocol proved effective, now mandatory for future migrations

Week 9 Scope Reduction:

  • Agent 3’s prep work analyzed 147 test files
  • Discovered only 1-2 entities needed Date→Long (not 5!)
  • 80% scope reduction, saved 3-4 hours
  • Enabled Days 4-5 completion in single session

With Agent 1 (AAP - Architecture)

Week 12 Architectural Reviews:

  • Agent 1 reviewed RoundDao migration (4.8/5 rating)
  • Identified default parameter anti-pattern
  • Provided KMP best practices guidance
  • Ensured architectural consistency

Migration Patterns & Standards

Week 11 Pattern (Critical)

Pattern:

  1. Create entity in shared:database
  2. Create DAO interface in shared:database
  3. Implement DAO in shared:database
  4. Comment out entity in ArcheryAppDatabase (androidApp) ← Critical!
  5. Update ArcheryKmpDatabase (shared:database)
  6. Run tests (4,090 tests must pass)
  7. Agent 3 validation

Why Critical:

  • Prevents DEX limit issues (duplicate entity definitions)
  • Maintains build stability
  • Clean separation between old and new database

KMP Best Practices

Enforced Standards:

  • Zero Android dependencies in shared code
  • Use Clock.System instead of System.currentTimeMillis()
  • kotlinx.serialization instead of Gson
  • expect/actual for platform-specific code
  • Comprehensive test coverage

Metrics Summary

Week 11-12 Combined (DAO Migrations)

  • DAOs Migrated: 19 (100% of plan)
  • Lines of Code: ~3,326
  • Methods: 353
  • Tests Passing: 4,090 (100%)
  • Coverage: 81%+
  • Build Success: 100%
  • Quality Rating: ⭐⭐⭐⭐⭐

Week 9 (Serialization Migrations)

  • Models Migrated: 25+
  • TypeConverters: 4
  • Tests Created: 80+ (34 serialization + 46 entity + 8 coverage)
  • Test Pass Rate: 100% (2051 tests)
  • Net Lines: -493 (Gson removal)
  • Quality Rating: ⭐⭐⭐⭐⭐

Key Learnings

Default Parameter Anti-Pattern

Never:

// BAD - evaluates ONCE at class load!
fun query(timestamp: Long = Clock.System.now().toEpochMilliseconds())

Always:

// GOOD - evaluate at call site
fun query(timestamp: Long)
// Call site:
dao.query(Clock.System.now().toEpochMilliseconds())

Why: Default parameters with time-sensitive values create silent bugs that appear to work but use stale data.

Migration Pattern Discipline

Lesson: Always follow established patterns (Week 11 pattern)

  • Deviation causes blockers (DEX limit)
  • Restoration is quick but disruptive
  • Better to follow pattern from start

Agent Collaboration Multiplier

Week 9 Success:

  • Agent 3’s prep work = 80% scope reduction
  • Clear communication (prep docs) = fast execution
  • Proactive analysis = massive time savings

Week 12 Success:

  • Agent 3’s enhanced protocol = caught P0 bug
  • Agent 1’s architectural review = quality assurance
  • Collaborative validation = zero regressions

Next Week Planning

Status: Ready for Week 13-14 Database Cutover

Mission: Activate ArcheryKmpDatabase, retire ArcheryAppDatabase

Prerequisites:

  • ✅ All 19 DAOs migrated
  • ✅ All entities migrated
  • ✅ Week 11 pattern validated
  • ✅ KMP compatibility verified

Agent 2 Readiness:

  • DAO migration expertise proven
  • KMP best practices established
  • Testing discipline demonstrated
  • Collaboration patterns successful

Strengths Demonstrated

  1. Technical Excellence:

    • Complex DAO migrations (RoundDao: 872 lines)
    • Polymorphic serialization handling
    • KMP compatibility enforcement

  2. Quality Focus:

    • 100% test pass rate across all migrations
    • Comprehensive test coverage
    • Zero regressions

  3. Problem Solving:

    • DEX blocker resolution
    • Default parameter bug fixes
    • Migration pattern discipline

  4. Collaboration:

    • Effective use of Agent 3’s prep work
    • Responsive to Agent 1’s architectural guidance
    • Clear communication and documentation

  5. Efficiency:

    • Week 9 Days 4-5 completed in single session
    • Week 12 completed ahead of schedule
    • Scope flexibility when needed

References

PRs:

  • PR #193: Week 12 Days 3-5 (MERGED)
  • PR #189: Week 12 Days 0-2 (MERGED)
  • PR #187: Week 11 Equipment DAOs (MERGED)
  • PR #162: Week 9 Serialization Migration (MERGED)

Documentation:

Reports:

  • docs/AGENT_MESSAGES/WEEK_12/agent-2-aam/...
  • docs/AGENT_MESSAGES/WEEK_11/agent-2-aam/...
  • docs/AGENT_MESSAGES/WEEK_9/agent-2-aam/...

Last Updated: 2025-10-31

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