diff --git a/CLAUDE.md b/CLAUDE.md
index c5f5196..42bd781 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -42,6 +42,14 @@ This is an iOS app for planning multi-stop sports road trips. It uses **Clean MV
    - `Models/Local/` - SwiftData models for local persistence (SavedTrip, UserPreferences)
    - `Services/` - CloudKitService (schedules), LocationService (geocoding/routing)
 
+4. **Export Layer** (`Export/`):
+   - `PDFGenerator` - Generates PDF trip itineraries with maps, photos, and attractions
+   - `ExportService` - Orchestrates PDF export with asset prefetching
+   - `Services/MapSnapshotService` - Generates static map images via MKMapSnapshotter
+   - `Services/RemoteImageService` - Downloads/caches team logos and stadium photos
+   - `Services/POISearchService` - Finds nearby restaurants, attractions via MKLocalSearch
+   - `Services/PDFAssetPrefetcher` - Parallel prefetching of all PDF assets
+
 ### Data Storage Strategy
 
 - **CloudKit Public DB**: Read-only schedules, stadiums, teams (shared across all users)
@@ -62,6 +70,18 @@ TripCreationView → TripCreationViewModel → PlanningRequest
 - All planning engine components are `actor` types for thread safety
 - Domain models are pure Codable structs; SwiftData models wrap them via encoded `Data` fields
 - CloudKit container ID: `iCloud.com.sportstime.app`
+- `PDFGenerator` and `ExportService` are `@MainActor final class` (not actors) because they access MainActor-isolated UI properties and use UIKit drawing
+
+### iOS 26 API Notes
+
+**Deprecated APIs** (use with `@available(iOS, deprecated: 26.0)` annotation):
+- `CLGeocoder` → Use `MKLocalSearch` with `.address` result type instead
+- `MKPlacemark` properties (locality, administrativeArea, etc.) → Still work but deprecated; use `MKMapItem` properties where possible
+- `MKMapItem.location` is non-optional in iOS 26 (returns `CLLocation`, not `CLLocation?`)
+
+**Swift 6 Concurrency**:
+- Use `@retroactive` for protocol conformances on types you don't own (e.g., `CLLocationCoordinate2D: @retroactive Codable`)
+- When capturing `var` in `async let`, create immutable copies first to avoid Swift 6 warnings
 
 ## Key View Components
 
@@ -97,6 +117,11 @@ Displays trip itinerary with conflict detection for same-day games in different
 
 `Scripts/scrape_schedules.py` scrapes NBA/MLB/NHL schedules from multiple sources (Basketball-Reference, Baseball-Reference, Hockey-Reference, official APIs) for cross-validation. See `Scripts/DATA_SOURCES.md` for source URLs and rate limits.
 
+## Documentation
+
+The `docs/` directory contains project documentation:
+- `MARKET_RESEARCH.md` - Competitive analysis and feature recommendations based on sports travel app market research (January 2026)
+
 ## Test Suites
 
 - **TripPlanningEngineTests** (50 tests) - Routing logic, must-see games, required destinations, EV charging, edge cases
@@ -121,6 +146,8 @@ xcodebuild -project SportsTime.xcodeproj -scheme SportsTime -destination 'platfo
 
 ## Future Phases
 
+See `docs/MARKET_RESEARCH.md` for full competitive analysis and feature prioritization.
+
 ### Phase 2: AI-Powered Trip Planning
 
 **Natural Language Trip Planning**
@@ -143,6 +170,37 @@ xcodebuild -project SportsTime.xcodeproj -scheme SportsTime -destination 'platfo
 - Implement graceful fallback for unsupported devices
 - See `axiom:axiom-foundation-models` skill for patterns
 
+### Phase 3: Stadium Bucket List
+
+**Progress Tracking**
+- Visual map showing visited vs. remaining stadiums per league
+- Digital passport/stamps for each visited stadium
+- Achievement badges (e.g., "All NL West", "Coast to Coast", "10 Stadiums")
+- Shareable progress cards for social media
+
+**Competitors**: Baseball Bucket List, Sports Venue Tracker, MLB BallPark Pass-Port (physical)
+
+### Phase 4: Group Trip Coordination
+
+**Collaborative Planning**
+- Invite friends to collaborate on trip planning
+- Polling/voting on game choices and destinations
+- Expense splitting integration
+- Shared itinerary with real-time sync
+- Role delegation (lodging, tickets, restaurants)
+
+**Competitors**: SquadTrip, Troupe, Howbout
+
+### Phase 5: Fan Community
+
+**Social Features**
+- Stadium tips from locals (best food, parking, pre-game bars)
+- Fan meetup coordination for away games
+- Trip reviews and ratings
+- Discussion forums for specific stadiums
+
+**Competitor**: Fantrip (fan-to-fan stays and local tips)
+
 ## User Instruction
 
 Do not commit code without prompting the user first.