# AI Code Battle - Implementation Progress

## Current Phase: Phase 2 - HTTP Protocol & Strategy Bots

**Status: ✅ COMPLETE**

### Phase 1 Completed

- [x] Go module initialization (`github.com/aicodebattle/acb`)
- [x] Project structure (`engine/`, `cmd/acb-local/`, `cmd/acb-mapgen/`)
- [x] Core types (`engine/types.go`)
- [x] Grid implementation (`engine/grid.go`) - Toroidal wrapping, distances, visibility
- [x] Game state (`engine/game.go`) - State management, fog of war
- [x] Turn execution (`engine/turn.go`) - Movement, combat, capture, energy, spawn
- [x] Replay writer (`engine/replay.go`) - Full replay JSON format
- [x] Match runner (`engine/match.go`) - Concurrent bot communication
- [x] Map generator (`cmd/acb-mapgen/`) - Rotational symmetry, connectivity validation
- [x] Unit tests - 32+ tests passing, determinism verified

### Phase 2 Completed

- [x] HMAC Authentication (`engine/auth.go`)
  - Request signing: `{match_id}.{turn}.{timestamp}.{sha256(body)}`
  - Response signing: `{match_id}.{turn}.{sha256(body)}`
  - Timestamp tolerance (30s) for replay attack prevention
  - Secret generation (256-bit, hex-encoded)
- [x] HTTP Bot Client (`engine/bot_http.go`)
  - HTTPBot implementing BotInterface
  - Per-turn timeout (3s default)
  - Crash detection (10 consecutive failures)
  - Move validation (position ownership, direction validity)
  - Response signature verification
- [x] Integration Tests (`engine/integration_test.go`)
  - Full HTTP match between mock bots
  - HMAC authentication round-trip
  - Response signing verification
- [x] Strategy Bot Implementations (6 languages)
  - **RandomBot** (Python) - Random moves, rating floor
  - **GathererBot** (Go) - Energy-focused, combat avoidance
  - **RusherBot** (Rust) - Aggressive core rushing
  - **GuardianBot** (PHP) - Defensive core protection
  - **SwarmBot** (TypeScript) - Formation-based combat
  - **HunterBot** (Java) - Target isolation and hunting

### Exit Criteria Progress

| Criterion | Status |
|-----------|--------|
| HMAC auth implementation | ✅ Complete |
| HTTP bot client with timeout | ✅ Complete |
| 6 strategy bots in 6 languages | ✅ Complete |
| All bots have Dockerfile | ✅ Complete |
| Integration tests passing | ✅ Complete |

## Next Phase: Phase 3 - Replay Viewer

**Status: Ready to start**

## File Structure

```
ai-code-battle/
├── go.mod
├── engine/
│   ├── types.go        # Core data types
│   ├── grid.go         # Toroidal grid implementation
│   ├── game.go         # Game state management
│   ├── turn.go         # Turn execution phases
│   ├── replay.go       # Replay recording
│   ├── match.go        # Match runner
│   ├── bot_local.go    # Local bot interface
│   ├── bot_http.go     # HTTP bot client
│   ├── auth.go         # HMAC authentication
│   └── *_test.go       # Test files
├── cmd/
│   ├── acb-local/      # CLI match runner
│   └── acb-mapgen/     # Map generator
├── bots/
│   ├── random/         # Python - RandomBot
│   ├── gatherer/       # Go - GathererBot
│   ├── rusher/         # Rust - RusherBot
│   ├── guardian/       # PHP - GuardianBot
│   ├── swarm/          # TypeScript - SwarmBot
│   └── hunter/         # Java - HunterBot
└── docs/
    └── plan/
        └── plan.md     # Full implementation plan
```

## Strategy Bot Summary

| Bot | Language | Strategy | Expected Rank |
|-----|----------|----------|---------------|
| RandomBot | Python | Random valid moves | 6th (floor) |
| GathererBot | Go | Energy collection, avoid combat | 4th-5th |
| RusherBot | Rust | Rush enemy cores aggressively | 4th-5th |
| GuardianBot | PHP | Defend cores, cautious expansion | 3rd-4th |
| SwarmBot | TypeScript | Formation cohesion, group advance | 1st-2nd |
| HunterBot | Java | Target isolated enemies | 1st-2nd |

## Running Tests

```bash
go test ./engine/... -v
```

## Building CLI Tools

```bash
go build ./cmd/acb-local
go build ./cmd/acb-mapgen
```

## Running a Match

```bash
./acb-local -seed 42 -max-turns 100 -output replay.json -verbose
```