# Implementation Summary
## Current State (v1.1.0)
Library crate implementing 4-player Spades with an optional HTTP server for concurrent multiplayer games.
### Core Library
- Full game logic: dealing, betting (including nil), trick-taking, scoring with bags
- State machine: NotStarted → Betting(0-3) → Trick(0-3) → Completed/Aborted
- Teams: players A+C vs B+D
- Fischer increment timers (optional per game)
- JSON serialization for all game types
### Server Features (behind `--features server`)
- REST API for game CRUD and transitions
- WebSocket subscriptions for real-time game state
- Matchmaking: seek queue (auto-match 4 players by max_points) + manual lobbies
- Challenge links: seat-specific join URLs with configurable expiry
- Player name validation with profanity filter (rustrict)
- SQLite persistence (optional, via `--db`)
- Drop guards for SSE disconnect cleanup
- CORS support
### Modules
| `lib.rs` | Game struct, Player, game logic, TimerConfig |
| `cards.rs` | Card, Suit, Rank, dealing, trick resolution |
| `game_state.rs` | State enum |
| `scoring.rs` | Round scoring, bags, nil bonus |
| `result.rs` | TransitionSuccess, TransitionError, GetError |
| `game_manager.rs` | GameManager, broadcast channels, SQLite integration |
| `matchmaking.rs` | Matchmaker, seek queue, lobbies |
| `challenges.rs` | ChallengeManager, seat-based invitations |
| `validation.rs` | Player name validation |
| `sqlite_store.rs` | SQLite persistence layer |
| `bin/server.rs` | Axum HTTP server, all route handlers |
### Tests
196 total (169 unit + 25 integration + 1 integration crate + 1 doc test).
```
cargo test # library tests
cargo test --features server # all tests
```
### Build
```
cargo build # library only
cargo build --features server # full build with server
cargo run --features server -- --port 3000 --db games.sqlite
```