Archery Apprentice Documentation

agent-1-ios-investigation

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Agent 1 (AAP): iOS Investigation & GitLive Firebase Evaluation

Agent: Agent 1 (AAP - Platform Abstractions, Patterns, Architecture) Weeks: 15-19 (October 2025 - November 2025) Mission: Firebase abstraction design + iOS investigation Status: ⏸️ PAUSED at 60% (awaiting macOS hardware)

Executive Summary

Agent 1 conducted comprehensive Firebase abstraction investigation and iOS feasibility analysis, completing 60% of planned iOS work before pausing for macOS hardware arrival. Delivered critical architectural designs and validated GitLive Firebase SDK approach through static analysis.

Key Recommendation: GitLive Firebase SDK is viable for iOS (static validation complete), runtime validation pending macOS availability.

Overview

Agent 1’s work spanned two major initiatives:

  1. Firebase Abstraction Design: Architectural design for removing Firebase coupling from domain layer
  2. iOS Investigation: Feasibility analysis for iOS app development using GitLive Firebase SDK

Both initiatives are critical blockers for KMP migration completion and iOS app development.

Work Completed

1. Firebase Abstraction Design (✅ COMPLETE)

Timeline: Week 15-16 Document: docs/kmp-migration/FIREBASE_ABSTRACTION_DESIGN.md Status: Design complete, implementation pending

Objectives:

  • Design platform-agnostic interfaces for Firebase operations
  • Plan migration strategy for 4 domain files with Firebase imports
  • Estimate effort for Firebase abstraction implementation
  • Validate KMP compatibility approach

Deliverables:

  1. ✅ RemoteDataSource Interface Hierarchy

    • RemoteTournamentDataSource (queries, observers, mutations)
    • RemoteAuthDataSource (authentication, auth state)
    • RemoteStorageDataSource (file uploads, downloads)

  2. ✅ Implementation Examples

    • FirebaseRemoteTournamentDataSource (Android implementation)
    • Flow abstractions for real-time listeners
    • Result types for error handling

  3. ✅ Migration Strategy

    • Step-by-step plan for 4 domain files
    • Repository refactoring approach
    • Testing strategy (unit, integration, E2E)

  4. ✅ Effort Estimate

    • Realistic: 3-4 weeks
    • Breakdown by Firebase pattern (queries, listeners, transactions)
    • Risk assessment and mitigations

Key Findings:

  • 10 Firebase imports in domain layer (BLOCKER for KMP migration)
  • FirebaseTournamentRepository: 1,912 lines, 42 Firebase-dependent methods
  • Complex patterns: Real-time listeners, transactions, batch operations
  • Abstraction approach: Interface-based abstraction with platform-specific implementations

Pattern Designed:

// shared:data - Platform-agnostic interface
interface RemoteTournamentDataSource {
    // Simple queries
    suspend fun getTournament(id: String): Result<Tournament>
 
    // Reactive observers (Flow abstraction)
    fun observeTournament(id: String): Flow<Tournament?>
 
    // Mutations
    suspend fun createTournament(tournament: Tournament): Result<String>
 
    // Transactions (abstracted as high-level operations)
    suspend fun joinTournament(
        tournamentId: String,
        participant: TournamentParticipant
    ): Result<Unit>
}
 
// app:data:remote - Android implementation
class FirebaseRemoteTournamentDataSource(
    private val firestore: FirebaseFirestore,
    private val auth: FirebaseAuth
) : RemoteTournamentDataSource {
    override fun observeTournament(id: String) = callbackFlow {
        val listener = firestore.collection("tournaments")
            .document(id)
            .addSnapshotListener { snapshot, error ->
                if (error != null) close(error)
                else trySend(snapshot?.toObject(Tournament::class.java))
            }
        awaitClose { listener.remove() }
    }
}

Impact: Unblocks Week 17-19 ViewModel migrations (services can move to shared:domain after abstraction)

2. iOS Investigation (⏸️ 60% COMPLETE - PAUSED)

Timeline: Week 17-19 Status: Paused awaiting macOS hardware Completion: ~60% (design + static validation)

Completed Work:

Phase 1: GitLive SDK Evaluation (✅ COMPLETE)

  • Investigated GitLive Firebase KMP SDK as Firebase abstraction
  • Evaluated API compatibility with Firebase SDK
  • Identified supported Firebase features (Firestore, Auth, Storage)
  • Documented API differences and migration requirements

Phase 2: Static Validation (✅ COMPLETE)

  • Created iOS build configuration
  • Added GitLive SDK dependencies
  • Verified iOS compilation succeeds
  • Validated zero Android imports in shared code
  • Result: 4.5/5 static validation rating (compilation successful)

Phase 3: ViewModel Pattern Validation (✅ COMPLETE)

  • Designed Presenter → SwiftUI ViewModel bridging pattern
  • Validated StateFlow → ObservableObject conversion approach
  • Documented Swift interop patterns
  • Approach: Kotlin Presenters wrapped in Swift ViewModels

Pattern Validated (Static):

// Kotlin Presenter (shared:presentation)
class EquipmentPresenter(
    private val repository: EquipmentRepository,
    private val scope: CoroutineScope
) {
    val items = repository.getAll()
        .stateIn(scope, SharingStarted.Eagerly, emptyList())
 
    fun deleteItem(id: Long) = scope.launch {
        repository.delete(id)
    }
}
// Swift ViewModel wrapper (iOS app)
class EquipmentViewModel: ObservableObject {
    private let presenter: EquipmentPresenter
    @Published var items: [Equipment] = []
 
    init(presenter: EquipmentPresenter) {
        self.presenter = presenter
        observeItems()
    }
 
    func observeItems() {
        presenter.items.watch { [weak self] items in
            self?.items = items
        }
    }
 
    func deleteItem(id: Int64) {
        presenter.deleteItem(id: id)
    }
}

Paused Work:

Phase 4: Runtime Validation (⏸️ PENDING - Requires macOS)

  • iOS app creation (Xcode project setup)
  • GitLive Firebase runtime initialization
  • Presenter integration testing
  • StateFlow observation from Swift
  • Firebase CRUD operations testing
  • Performance validation
  • Memory management validation (ARC vs JVM GC)

Phase 5: GO/NO-GO Decision (⏸️ PENDING - Requires Phase 4)

  • 5 critical tests (Firebase auth, Firestore read/write, real-time listeners, offline sync)
  • Performance benchmarking
  • Memory leak testing
  • Final recommendation: GO (continue GitLive) or NO-GO (pivot to native Swift Firebase)

Completion Estimate: 60% complete

  • ✅ Design: 100%
  • ✅ Static validation: 100%
  • ⏸️ Runtime validation: 0%
  • ⏸️ GO/NO-GO decision: 0%

Key Findings

Firebase Abstraction

Finding 1: Firebase Coupling is Critical Blocker

  • Impact: Cannot migrate ANY services to shared:domain with Firebase imports
  • Scope: 4 domain files, 10 Firebase imports, 1,912-line repository
  • Priority: CRITICAL PATH for KMP migration
  • Effort: 3-4 weeks realistic estimate

Finding 2: Complex Patterns Require Careful Abstraction

  • Real-time listeners: .snapshots() → Flow<T> conversion
  • Transactions: .runTransaction() → High-level operation interfaces
  • Batch operations: .batch() → Abstracted batch APIs
  • Authentication: FirebaseAuth.currentUser → RemoteAuthDataSource.getCurrentUserId()

Finding 3: Abstraction Enables iOS Support

  • Interface-based design allows multiple implementations:
    • Android: Firebase SDK
    • iOS: GitLive Firebase SDK (or native Swift Firebase)
  • KMP-compatible patterns (Flow, suspend functions, Result types)

iOS Investigation

Finding 1: GitLive SDK Statically Compatible (4.5/5)

  • ✅ iOS compilation succeeds
  • ✅ API surface matches Firebase SDK closely
  • ✅ Supports core features (Firestore, Auth, Storage)
  • ⏸️ Runtime behavior UNKNOWN (awaiting macOS)

Finding 2: Presenter Pattern Works on iOS (Static Validation)

  • ✅ StateFlow observable from Swift
  • ✅ Kotlin coroutines bridgeable to Swift async/await
  • ✅ Zero Android imports in Presenters
  • ⏸️ Performance UNKNOWN (awaiting runtime tests)

Finding 3: iOS Runtime Validation is Critical

  • Risk: GitLive SDK may have runtime issues despite static compatibility
  • Unknowns: Performance, memory management, offline sync, real-time listeners
  • Mitigation: 5 critical tests planned for runtime validation
  • Decision: GO/NO-GO based on runtime results

Week 17-19 Contribution

Agent 1 Status: PAUSED (awaiting macOS) Contribution: iOS PoC merged earlier (PR #207) Impact: Validated static compilation, unblocked Agent 2 ViewModel migrations

Decision Made: Continue ViewModel migrations (Agent 2) while waiting for macOS

  • Path chosen: Path A (continue ViewModels, Agent 1 idle)
  • Outcome: Week 17-19 completed successfully (10 ViewModels migrated)
  • Agent 1 resumes when macOS arrives

Technical Debt Addressed

Firebase Coupling Investigation

Before Investigation:

  • Firebase usage scattered throughout codebase
  • No clear understanding of Firebase dependency scope
  • Unknown effort to abstract Firebase

After Investigation:

  • 10 Firebase imports catalogued
  • 42 Firebase-dependent methods identified
  • Clear abstraction strategy designed
  • Realistic 3-4 week effort estimate

iOS Feasibility

Before Investigation:

  • Unknown if iOS app is viable with KMP
  • Unknown if GitLive SDK works
  • Unknown effort to build iOS app

After Investigation:

  • iOS app is viable (static validation passed)
  • GitLive SDK compiles successfully (4.5/5)
  • Runtime validation required for final decision
  • Presenter pattern validated for iOS

Recommendations

Immediate (Week 20)

If macOS NOT arrived:

  • Continue Path A (Agent 2 ViewModel migrations)
  • Agent 1 remains idle
  • Resume iOS work when macOS arrives

If macOS arrived:

  • Execute Path B (Agent 1 iOS runtime validation) OR
  • Execute Path C (Agent 1 iOS + Agent 2 ViewModels in parallel)
  • Complete Phase 4 runtime validation (2-3 days)
  • Make GO/NO-GO decision on GitLive SDK

Short-Term (Week 20-22)

Firebase Abstraction (CRITICAL PATH):

  • Priority: Implement Firebase abstraction design (3-4 weeks)
  • Unblocks: Service migration to shared:domain
  • Enables: iOS Firebase support (via GitLive SDK)

iOS Runtime Validation (HIGH PRIORITY):

  • Timing: When macOS arrives
  • Duration: 2-3 days
  • Outcome: GO (GitLive SDK) or NO-GO (pivot to native Swift Firebase)

Long-Term (Week 23+)

If GO (GitLive SDK):

  • Implement remaining 22 GitLive Firebase methods
  • Build iOS app with shared Presenters
  • Test multi-platform Firebase integration

If NO-GO (Native Swift Firebase):

  • Implement Swift-specific Firebase layer
  • Build iOS app with shared Presenters (Firebase separate)
  • Accept dual Firebase implementations (Android + iOS)

Blockers & Dependencies

Current Blockers

Blocker 1: macOS Hardware Unavailable

  • Blocks: iOS runtime validation (Phase 4)
  • Blocks: GO/NO-GO decision (Phase 5)
  • ETA: ~1 week (ordered, arriving soon)
  • Impact: Agent 1 idle, iOS work paused

Blocker 2: Firebase Abstraction Not Implemented

  • Blocks: Service migration to shared:domain
  • Blocks: iOS Firebase support
  • Timeline: 3-4 weeks implementation
  • Dependency: Agent 1 design complete (ready to implement)

Dependencies

ViewModel Migrations depend on:

  • ✅ Presenter pattern established (Week 17-19 complete)
  • ⏸️ Firebase abstraction (not blocking current work, blocks future services)

iOS Development depends on:

  • ⏸️ macOS hardware (critical blocker)
  • ⏸️ Runtime validation (GO/NO-GO decision)
  • ✅ Presenter pattern (10 Presenters ready for iOS)
  • ⏸️ Firebase abstraction (enables iOS Firebase support)

Work Remaining

Firebase Abstraction Implementation

Effort: 3-4 weeks Agent: TBD (Agent 1 design, Agent 2 could implement)

Tasks:

  1. Create RemoteDataSource interfaces (2-3 days)
  2. Implement FirebaseRemoteDataSource (5-7 days)
  3. Remove Firebase from domain layer (3-4 days)
  4. Update repositories (3-4 days)
  5. Test Firebase abstraction (2-3 days)

iOS Runtime Validation

Effort: 2-3 days (when macOS arrives) Agent: Agent 1 (AAP)

Tasks:

  1. iOS app creation (4-6 hours)
  2. GitLive Firebase setup (2-3 hours)
  3. Runtime tests (5 critical tests, 4-8 hours)
  4. GO/NO-GO decision (1-2 hours analysis)

5 Critical Tests:

  1. Firebase Auth: Sign in, sign out, auth state observation
  2. Firestore Read: Query tournaments, observe real-time updates
  3. Firestore Write: Create, update, delete operations
  4. Offline Sync: Offline writes, sync on reconnect
  5. Performance: Measure Presenter response time, memory usage

iOS App Development (if GO)

Effort: 4-6 weeks (after runtime validation) Agent: Agent 1 (AAP) + potential iOS specialist

Tasks:

  1. iOS UI implementation (SwiftUI screens)
  2. Presenter integration (all 10 Presenters + future)
  3. GitLive Firebase integration (22 remaining methods)
  4. iOS-specific platform abstractions
  5. Testing (unit, integration, E2E)

Weeks 17-19 ViewModel Migrations:

  • Agent 2 migrated 10 ViewModels while Agent 1 paused
  • All 10 Presenters are iOS-ready (zero Android imports)
  • Runtime validation will test these 10 Presenters on iOS

Firebase Abstraction Design:

  • Unblocks service migration to shared:domain
  • Enables iOS Firebase support (GitLive or native)
  • Critical path for KMP migration completion

Recognition

Agent 1 delivered critical architectural work despite macOS blocker:

  • ⭐ Architectural Design: Firebase abstraction design complete
  • ⭐ iOS Feasibility: Static validation passed (4.5/5)
  • ⭐ Pattern Validation: Presenter → SwiftUI ViewModel pattern designed
  • ⭐ Risk Assessment: Identified unknowns, planned mitigation (5 critical tests)
  • ⭐ Pragmatic Approach: Paused at 60% (appropriate given macOS unavailability)

Overall Assessment: 60% complete, on hold for macOS, ready to resume runtime validation

Next Steps

Immediate (When macOS Arrives):

  1. Complete Phase 4: iOS runtime validation (2-3 days)
  2. Run 5 critical tests (Firebase, Presenters, performance)
  3. Complete Phase 5: GO/NO-GO decision
  4. Resume full iOS development OR pivot to native Swift Firebase

Short-Term (Week 20-22):

  • Option A: Wait for macOS, continue ViewModel migrations (Agent 2)
  • Option B: Start Firebase abstraction implementation (Agent 1 design → Agent 2 implementation)
  • Option C: Parallel work when macOS arrives (Agent 1 iOS + Agent 2 ViewModels)

Long-Term (Week 23+):

  • iOS app development (if GO on GitLive SDK)
  • Dual Firebase implementation (if NO-GO, use native Swift Firebase)
  • Multi-platform testing and validation
  • Weeks 17-19 Overview
  • docs/kmp-migration/FIREBASE_ABSTRACTION_DESIGN.md (Agent 1 deliverable)
  • docs/kmp-migration/WEEK_15_20_INVESTIGATION_FINDINGS.md (Firebase coupling analysis)

Tags

agent-1 aap ios-investigation firebase-abstraction gitlive-sdk runtime-validation platform-abstractions architectural-design paused

Status

⏸️ PAUSED AT 60%

  • Design work: 100% complete
  • Static validation: 100% complete (4.5/5)
  • Runtime validation: 0% complete (blocked by macOS)
  • GO/NO-GO decision: Pending runtime validation
  • Ready to resume when macOS arrives

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