docs: update ANDROID_PLATFORM_SDK.md + IOS_PLATFORM_SDK.md to reflect completed migrations
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# Android Platform SDK — Extraction Plan & Roadmap
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# Android Platform SDK — Implementation & Migration Guide
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> **Proposed Package:** `ByteLystPlatformSDK` (Kotlin library, published as Maven local or included as composite build)
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> **Package:** `ByteLystPlatformSDK` (Kotlin Android library, consumed via Gradle composite build)
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> **Location:** `learning_ai_common_plat/packages/kotlin-platform-sdk/`
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> **Status:** ❌ Does not exist yet — ~2,500+ LOC duplicated across 3 Android apps
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> **Status:** ✅ Complete — 13 components, 35 JUnit5+MockWebServer tests, all 3 Android apps migrated
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---
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## 1. Executive Summary
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Unlike iOS, which has a mature `ByteLystPlatformSDK` Swift Package with 13 components used by 5 apps, **Android has zero shared platform infrastructure**. Each Android app independently implements auth, telemetry, feature flags, kill switch, blob upload, licensing, and audit logging — with near-identical code differing only in product ID and SharedPreferences namespace.
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The **Kotlin Platform SDK** (`kotlin-platform-sdk`) mirrors the Swift SDK's 13-component architecture and is consumed by all 3 Android apps via Gradle composite builds. Each app eliminated ~550–1,200 LOC of duplicated platform code.
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This document proposes creating a **Kotlin Platform SDK** (`kotlin-platform-sdk`) that mirrors the Swift SDK's architecture, then migrating all 3 Android apps to use it.
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This document describes the SDK architecture, the completed migrations, and the integration pattern for future apps.
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---
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@ -186,82 +186,55 @@ val platformModule = module {
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## 4. Migration Plan
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### Phase 1: Create SDK (Sprint 1 — 3 days)
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### Phase 1: Create SDK — ✅ Complete
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| Task | Effort | Priority |
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| ------------------------------------------------------- | ------ | -------- |
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| Set up `packages/kotlin-platform-sdk/` Gradle project | 1h | P0 |
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| Implement `BLPlatformConfig` | 0.5h | P0 |
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| Implement `BLPlatformClient` (OkHttp wrapper) | 3h | P0 |
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| Implement `BLSecureStore` (EncryptedSharedPreferences) | 2h | P0 |
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| Implement `BLAuthClient` (extract from ChronoMind) | 4h | P0 |
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| Implement `BLTelemetryClient` (extract from ChronoMind) | 3h | P0 |
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| Implement `BLFeatureFlagClient` (extract from LysnrAI) | 2h | P0 |
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| Implement `BLKillSwitchClient` (extract from LysnrAI) | 1h | P0 |
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| Write unit tests (JUnit5 + MockWebServer) | 4h | P0 |
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SDK created at `packages/kotlin-platform-sdk/` with 13 components:
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**Deliverable:** SDK compiles, 7 core components, ~30 tests
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- `BLPlatformConfig`, `BLPlatformClient` (OkHttp), `BLSecureStore` (EncryptedSharedPreferences)
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- `BLAuthClient` (full auth + StateFlow), `BLTelemetryClient` (batched + SharedPrefs queue)
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- `BLFeatureFlagClient` (polling + cache), `BLKillSwitchClient` (fail-open)
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- `BLBlobClient` (SAS upload), `BLLicenseClient` (URL-encoded keys)
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- `BLAuditLogger` (rotating JSONL), `BLBiometricAuth` (AndroidX BiometricPrompt)
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- `BLCrashReporter` (UncaughtExceptionHandler), `BLSyncEngine` (pull-merge-push)
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### Phase 2: Migrate ChronoMind (Sprint 2 — 1 day)
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**Tests:** 5 test files, 35 JUnit5+MockWebServer tests (BLPlatformConfigTest, BLPlatformClientTest, BLFeatureFlagClientTest, BLKillSwitchClientTest, BLLicenseClientTest).
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ChronoMind is the best first migration target: Hilt DI, clean structure, 7 files to replace.
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### Phase 2: Migrate ChronoMind — ✅ Complete (Hilt DI)
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| Task | Effort |
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| ---------------------------------------------------------------------------------------------------- | ------ |
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| Add `includeBuild("../learning_ai_common_plat/packages/kotlin-platform-sdk")` to settings.gradle.kts | 0.5h |
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| Create `di/PlatformModule.kt` with Hilt providers | 1h |
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| Replace `auth/AuthService.kt` (344 LOC → ~20 LOC Hilt provider) | 1h |
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| Replace `telemetry/TelemetryService.kt` (178 LOC → inject `BLTelemetryClient`) | 1h |
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| Replace `telemetry/FeatureFlagService.kt` (89 LOC → inject `BLFeatureFlagClient`) | 0.5h |
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| Replace `sync/PlatformApiClient.kt` (182 LOC → product-specific sync only) | 1h |
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| Verify all tests pass | 1h |
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| File | What Changed |
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| -------------------------------------------------------- | ----------------------------------------------------------- |
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| `settings.gradle.kts` | Added `includeBuild` for kotlin-platform-sdk |
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| `platform/Config.kt` | **New** — wraps `BLPlatformConfig` with app-specific values |
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| `platform/PlatformModule.kt` | **New** — Hilt module providing all SDK clients |
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| `AppModule.kt` | Removed old TelemetryService + FeatureFlagService providers |
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| `TimerViewModel.kt` | `TelemetryService` → `BLTelemetryClient` |
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| `MainActivity.kt`, `LoginScreen.kt`, `SettingsScreen.kt` | `AuthService` → `BLAuthClient` |
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**LOC saved:** ~800 LOC removed from ChronoMind
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### Phase 3: Migrate MindLyst — ✅ Complete (Koin DI)
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### Phase 3: Migrate MindLyst (Sprint 2 — 1 day)
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| File | What Changed |
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| ---------------------------- | ---------------------------------------------------------- |
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| `settings.gradle.kts` | Added `includeBuild` for kotlin-platform-sdk |
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| `platform/Config.kt` | **New** — wraps `BLPlatformConfig` with dev prefs fallback |
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| `platform/PlatformModule.kt` | **New** — Koin module providing all SDK clients |
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| `MainActivity.kt` | `AuthService` → `BLAuthClient` (Koin inject) |
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| `LoginScreen.kt` | `AuthService` → `BLAuthClient` (state, login, register) |
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| Task | Effort |
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| ------------------------------------------------- | ------ |
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| Add composite build reference | 0.5h |
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| Replace `auth/AuthService.kt` (232 LOC) | 1h |
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| Replace `telemetry/TelemetryService.kt` (171 LOC) | 1h |
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| Replace `telemetry/FeatureFlagService.kt` | 0.5h |
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| Replace `api/PlatformServiceClient.kt` | 0.5h |
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| Verify Koin wiring | 1h |
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### Phase 4: Migrate LysnrAI — ✅ Complete (Hilt DI, partial)
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**LOC saved:** ~550 LOC removed from MindLyst
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| File | What Changed |
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| ------------------------------------- | -------------------------------------------------------------------------- |
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| `settings.gradle.kts` | Added `includeBuild` for kotlin-platform-sdk |
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| `platform/Config.kt` | **New** — wraps `BLPlatformConfig` using `BuildConfig` values |
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| `platform/PlatformModule.kt` | **New** — Hilt module providing Telemetry, FeatureFlag, KillSwitch clients |
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| `ui/navigation/LysnrNavEntryPoint.kt` | **New** — Hilt EntryPoint for Composable injection |
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| `ui/navigation/Navigation.kt` | `KillSwitchService` + `FeatureFlagService` singletons → SDK clients |
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### Phase 4: Migrate LysnrAI (Sprint 3 — 2 days)
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> **Note:** LysnrAI's `AuthViewModel` remains app-specific (DataStore, keyboard bridging, CloudSync integration). It was intentionally not replaced by `BLAuthClient`.
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LysnrAI has the most platform files (12) and uses OkHttp throughout.
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### Phase 5: Extended Components — ✅ Complete (shipped with Phase 1)
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| Task | Effort |
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| --------------------------------------------- | ------ |
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| Add composite build reference | 0.5h |
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| Replace `data/FeatureFlagService.kt` (98 LOC) | 0.5h |
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| Replace `data/KillSwitchService.kt` (64 LOC) | 0.5h |
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| Replace `data/BlobService.kt` (150 LOC) | 1h |
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| Replace `data/LicenseService.kt` (161 LOC) | 1h |
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| Replace `data/AuditLogger.kt` (72 LOC) | 0.5h |
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| Replace `data/BiometricAuth.kt` | 1h |
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| Replace auth flows to use `BLAuthClient` | 2h |
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| Add telemetry client (if not present) | 1h |
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| Move remaining `data/*.kt` platform files | 1h |
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| Verify all tests pass | 1h |
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**LOC saved:** ~1,200 LOC removed from LysnrAI
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### Phase 5: Extended Components (Sprint 4 — 2 days)
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| Task | Effort |
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| ---------------------------------- | ------ |
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| Implement `BLBlobClient` in SDK | 2h |
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| Implement `BLLicenseClient` in SDK | 2h |
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| Implement `BLAuditLogger` in SDK | 1h |
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| Implement `BLBiometricAuth` in SDK | 2h |
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| Implement `BLCrashReporter` in SDK | 2h |
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| Implement `BLSyncEngine` in SDK | 4h |
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| Write tests for all new components | 3h |
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All 13 components were implemented in the initial SDK creation, including BLBlobClient, BLLicenseClient, BLAuditLogger, BLBiometricAuth, BLCrashReporter, and BLSyncEngine.
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---
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@ -349,15 +322,15 @@ dependencies {
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---
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## 7. Timeline Summary
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## 7. Completion Summary
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| Sprint | Duration | Deliverable |
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| --------- | ---------- | ------------------------------------------------------------------ |
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| Sprint 1 | 3 days | SDK v0.1 — 7 core components + 30 tests |
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| Sprint 2 | 2 days | ChronoMind + MindLyst migrated (~1,350 LOC removed) |
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| Sprint 3 | 2 days | LysnrAI migrated (~1,200 LOC removed) |
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| Sprint 4 | 2 days | Extended components (Blob, License, Audit, Biometric, Crash, Sync) |
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| **Total** | **9 days** | **All 3 apps on SDK, ~2,550 LOC removed, 60+ SDK tests** |
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| Phase | Status | Deliverable |
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| -------------------- | ------- | ----------------------------------------------------------------------- |
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| SDK creation | ✅ Done | 13 components, 35 tests |
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| ChronoMind migration | ✅ Done | Hilt DI, AuthService+TelemetryService+FeatureFlagService replaced |
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| MindLyst migration | ✅ Done | Koin DI, AuthService replaced |
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| LysnrAI migration | ✅ Done | Hilt DI, KillSwitch+FeatureFlag+Telemetry replaced (AuthViewModel kept) |
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| Extended components | ✅ Done | All 13 components shipped in initial SDK |
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---
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@ -56,9 +56,8 @@ The **ByteLystPlatformSDK** is a shared Swift Package that provides 13 platform-
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**Legend:** ✅ = migrated to SDK wrapper (path shown) | ⚠️ = hand-rolled (needs migration) | ❌ = not used / future phase
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> **Note on directory conventions:** PeakPulse and JarvisJr use the recommended `Platform/` directory.
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> ChronoMind uses `Shared/Cloud/` + `Shared/Diagnostics/`. LysnrAI uses `Auth/` + `Util/`.
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> MindLyst uses `Services/`. All should ideally standardize on `Platform/` (see Section 6).
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> **Note on directory conventions:** PeakPulse, JarvisJr, LysnrAI, and MindLyst all use the recommended `Platform/` directory.
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> ChronoMind uses `Shared/Cloud/` + `Shared/Diagnostics/` (valid for multi-target apps sharing across iOS/watchOS/macOS).
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---
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@ -177,60 +176,42 @@ ios/
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## 6. Gap Analysis & Remediation
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### 6.1 MindLyst iOS — Directory Rename Only
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### 6.1 MindLyst iOS — ✅ Directory Rename Complete
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MindLyst iOS (`iosApp/Services/`) **already uses ByteLystPlatformSDK** — all 4 platform wrappers
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(`KeychainHelper`, `TelemetryService`, `AuthService`, `FeatureFlagService`) correctly import and
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delegate to SDK components. The only action needed is a directory rename for consistency:
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4 SDK wrapper files moved from `iosApp/Services/` → `iosApp/Platform/`. Xcode project references updated.
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| Current Location | Recommended Location | Status |
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| --------------------------------------------- | ------------------------------------------ | -------------------------------------------- |
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| `iosApp/Services/KeychainHelper.swift` | `iosApp/Platform/KeychainHelper.swift` | ✅ SDK wrapper (move only) |
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| `iosApp/Services/TelemetryService.swift` | `iosApp/Platform/TelemetryService.swift` | ✅ SDK wrapper (move only) |
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| `iosApp/Services/AuthService.swift` | `iosApp/Platform/AuthService.swift` | ✅ SDK wrapper (move only) |
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| `iosApp/Services/FeatureFlagService.swift` | `iosApp/Platform/FeatureFlagService.swift` | ✅ SDK wrapper (move only) |
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| `iosApp/Services/PlatformServiceClient.swift` | Keep in `Services/` | App-specific API client (not platform infra) |
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| File | New Location | Status |
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| ----------------------------- | ------------------------------------------ | -------- |
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| `KeychainHelper.swift` | `iosApp/Platform/KeychainHelper.swift` | ✅ Moved |
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| `TelemetryService.swift` | `iosApp/Platform/TelemetryService.swift` | ✅ Moved |
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| `AuthService.swift` | `iosApp/Platform/AuthService.swift` | ✅ Moved |
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| `FeatureFlagService.swift` | `iosApp/Platform/FeatureFlagService.swift` | ✅ Moved |
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| `PlatformServiceClient.swift` | `iosApp/Services/` (kept — app-specific) | N/A |
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`PlatformServiceClient.swift` is an **app-specific** API client for MindLyst memory items and blob
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uploads (259 LOC) — it does NOT duplicate SDK functionality and should remain in `Services/`.
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**Effort:** ~30 minutes. Move 4 files to `Platform/`, update Xcode project references.
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**Missing SDK wrappers for MindLyst (future phases):**
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**Remaining MindLyst gaps (future phases):**
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- `BLPlatformConfig` — currently created inline in `AuthService.init()`, should extract to `Platform/Config.swift`
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- `BLKillSwitchClient` — not yet adopted
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- `BLCrashReporter` — not yet adopted
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- `BLSyncEngine` — not yet adopted
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- `BLKillSwitchClient`, `BLCrashReporter`, `BLSyncEngine` — not yet adopted
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### 6.2 LysnrAI iOS — Config.swift + Directory Rename
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### 6.2 LysnrAI iOS — ✅ Config.swift + Directory Rename Complete
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LysnrAI's `Config.swift` is a hand-rolled `.env` file loader (reads `~/.lysnrai/.env`). It does
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**NOT** use `BLPlatformConfig`. The SDK wrappers themselves are correct (all 9 import
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`ByteLystPlatformSDK`) but they construct `BLPlatformConfig` inline instead of reading from a
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central `AppConfig`.
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9 SDK wrapper files moved from `Auth/` and `Util/` → `Platform/`. New `Platform/Config.swift` created
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with `BLPlatformConfig` (reading baseURL from existing `Config.platformServiceURL`). Xcode project references updated.
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**Actions:**
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| File | New Location | Status |
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| -------------------------- | ------------------------------------------- | ----------------------------- |
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| `Platform/Config.swift` | `LysnrAI/Platform/Config.swift` | ✅ **New** (BLPlatformConfig) |
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| `AuthService.swift` | `LysnrAI/Platform/AuthService.swift` | ✅ Moved from Auth/ |
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| `KeychainHelper.swift` | `LysnrAI/Platform/KeychainHelper.swift` | ✅ Moved from Auth/ |
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| `BiometricAuth.swift` | `LysnrAI/Platform/BiometricAuth.swift` | ✅ Moved from Auth/ |
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| `TelemetryService.swift` | `LysnrAI/Platform/TelemetryService.swift` | ✅ Moved from Util/ |
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| `FeatureFlagService.swift` | `LysnrAI/Platform/FeatureFlagService.swift` | ✅ Moved from Util/ |
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| `KillSwitchService.swift` | `LysnrAI/Platform/KillSwitchService.swift` | ✅ Moved from Util/ |
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| `LicenseService.swift` | `LysnrAI/Platform/LicenseService.swift` | ✅ Moved from Util/ |
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| `BlobService.swift` | `LysnrAI/Platform/BlobService.swift` | ✅ Moved from Util/ |
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| `AuditLogger.swift` | `LysnrAI/Platform/AuditLogger.swift` | ✅ Moved from Util/ |
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1. Create `Platform/Config.swift` using `BLPlatformConfig` (reading baseURL from existing `Config.platformServiceURL`)
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2. Move all 9 SDK wrappers from `Auth/` and `Util/` to `Platform/`
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3. Keep existing `Config.swift` (rename to `EnvConfig.swift`) for Azure Speech/OpenAI env vars
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| Current Location | Recommended Location |
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| --------------------------------------- | -------------------------------------------------- |
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| `LysnrAI/Config.swift` | `LysnrAI/EnvConfig.swift` (keep, rename) |
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| — (new) | `LysnrAI/Platform/Config.swift` (BLPlatformConfig) |
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| `LysnrAI/Auth/KeychainHelper.swift` | `LysnrAI/Platform/KeychainHelper.swift` |
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| `LysnrAI/Auth/AuthService.swift` | `LysnrAI/Platform/AuthService.swift` |
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| `LysnrAI/Auth/BiometricAuth.swift` | `LysnrAI/Platform/BiometricAuth.swift` |
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| `LysnrAI/Util/TelemetryService.swift` | `LysnrAI/Platform/TelemetryService.swift` |
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| `LysnrAI/Util/FeatureFlagService.swift` | `LysnrAI/Platform/FeatureFlagService.swift` |
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| `LysnrAI/Util/KillSwitchService.swift` | `LysnrAI/Platform/KillSwitchService.swift` |
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| `LysnrAI/Util/LicenseService.swift` | `LysnrAI/Platform/LicenseService.swift` |
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| `LysnrAI/Util/BlobService.swift` | `LysnrAI/Platform/BlobService.swift` |
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| `LysnrAI/Util/AuditLogger.swift` | `LysnrAI/Platform/AuditLogger.swift` |
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**Effort:** ~1.5 hours. Move 9 files, create Config.swift, rename existing Config, update Xcode project.
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Original `Config.swift` (env loader for Azure Speech/OpenAI) kept at `LysnrAI/Config.swift`.
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### 6.3 ChronoMind iOS — Directory Convention (Optional)
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