Repository Updates Summary

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Summary for Repository Documentation Updates

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CLAUDE.md Updates Needed

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Build System Section

### Circular Dependencies

The build system handles circular dependencies gracefully:

**procgen ↔ shared:**
- Uses `tsc || echo` pattern to exit 0 even with circular dep errors
- Packages produce partial output sufficient for downstream consumers

**plugin-hyperscape ↔ shared:**
- Uses `--skipLibCheck` in shared's declaration generation
- Variable shadowing fixes applied (e.g., PlayerMovementSystem.ts)

If you encounter circular dependency errors:
1. Don't panic - the build system handles this automatically
2. Check for partial output in dist/ directories
3. Use `import type` for type-only imports when possible

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Testing Section

### CI Test Reliability

Recent improvements to CI test reliability:

- **Timeouts**: Increased for intensive tests (geometry: 120s, procgen: increased)
- **Benchmarks**: Relaxed thresholds for CI environment variance
- **Manifests**: Fixed invalid JSON syntax in manifest files

If tests pass locally but fail in CI:
- Check if test is compute-intensive
- Increase timeout for CI environment
- Relax performance thresholds for parallel test contention

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Terrain System Section

### Terrain Generation

The terrain system uses centralized parameters in `TerrainHeightParams.ts`:

**Single Source of Truth:**
- All noise layer definitions (continent, ridge, hill, erosion, detail)
- Island configuration (radius, falloff, base elevation)
- Pond configuration (radius, depth, center position)
- Coastline noise for irregular shorelines
- Mountain boost configuration

**Worker Integration:**
- `buildGetBaseHeightAtJS()` injects constants into worker code
- Ensures worker heights match main thread exactly
- Prevents parameter drift between threads

**Performance:**
- Worker-based height and normal computation
- 63x reduction in main-thread noise evaluations
- Parallel processing across CPU cores

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README.md Updates Needed

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Deployment Section

## Deployment

### Vast.ai GPU Deployment

The `vast-keeper` package provides automated GPU instance provisioning:

**Prerequisites:**
- Python 3.10+ (vastai-sdk requirement)
- Vast.ai API key

**Setup:**
```bash
cd packages/vast-keeper
pip3 install --break-system-packages vastai  # Debian 12+
bun run start

• Filters for US-based machines
• Standard CUDA Docker images
• SSH key generation for secure access
• Runtime environment variable injection

### Docker Section

Update Docker information with new configurations:

```markdown
## Docker

### Production Images

**Server Image:**
- Base: node:20-bookworm-slim (Python 3.11+ support)
- Includes: build-essential, git-lfs, python3, pip3
- Sets CI=true to skip asset download

**Vast Keeper Image:**
- Base: node:20-bookworm-slim
- Includes: vastai SDK, SSH key generation
- Uses --break-system-packages for pip3 (Debian 12 PEP 668)

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Build System Section

## Build System

### Circular Dependencies

The monorepo handles circular dependencies between packages:

- **procgen ↔ shared**: Uses `tsc || echo` pattern
- **plugin-hyperscape ↔ shared**: Uses `--skipLibCheck`

Builds exit 0 even with circular dependency errors. Packages produce partial output sufficient for downstream consumers.

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Key Changes Summary

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Terrain System (High Priority)

1. TerrainHeightParams.ts: New centralized parameter file
   • Single source of truth for all terrain constants
   • Worker code generation via buildGetBaseHeightAtJS()
   • Prevents parameter drift between threads
2. Worker Computation: Height and normal calculation in workers
   • 63x reduction in main-thread noise evaluations
   • Parallel processing across CPU cores
   • Conditional fallback for flat zone tiles

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Duel Arena (Medium Priority)

1. Combat AI Fixes: 6 bug fixes for agent duel gameplay
   • 2H sword attack timing
   • Teleport handling during fights
   • Stale avatar cleanup
   • FIGHT text display
   • Health bar synchronization
2. Visual Enhancements:
   • Lit torches at arena corners
   • Procedural stone tile floor textures
   • Fence posts and rails (replaced solid walls)

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Build System (High Priority)

1. Circular Dependency Handling:
   • procgen and plugin-hyperscape builds resilient to circular deps
   • Uses tsc || echo and --skipLibCheck patterns
   • Prevents clean build failures
2. CI Improvements:
   • Increased test timeouts for CI reliability
   • Fixed invalid manifest JSONs
   • Added Foundry for MUD contracts tests

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Deployment (Medium Priority)

1. Vast.ai Support:
   • Python 3.11+ requirement (bookworm-slim)
   • vastai SDK installation with —break-system-packages
   • SSH key generation in Docker
   • US-based machine filtering
2. Docker Improvements:
   • build-essential for native modules
   • git-lfs for asset checks
   • CI=true to skip asset download
   • DNS configuration (Google DNS)

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Documentation Files Updated

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In This PR

1. changelog.mdx: Added February 22, 2026 update section
2. architecture.mdx: Added terrain system and circular dependency info
3. packages/shared.mdx: Added terrain generation system section
4. devops/troubleshooting.mdx: Added circular dependency and manifest validation sections
5. devops/docker.mdx: Added production Docker image configurations
6. guides/deployment.mdx: Added Vast.ai and CI/CD sections
7. wiki/game-systems/terrain.mdx: Updated with TerrainHeightParams details
8. wiki/game-systems/duel-arena.mdx: Added visual enhancements and combat AI fixes
9. api-reference/terrain.mdx: New API reference for TerrainSystem and TerrainHeightParams
10. guides/recent-updates.mdx: New migration guide for recent changes

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Repository Files to Update Manually

1. CLAUDE.md: Add sections for circular dependencies, CI test reliability, and terrain system
2. README.md: Add Vast.ai deployment, Docker configurations, and build system notes

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Line Count Summary

• changelog.mdx: ~150 lines (new update section)
• architecture.mdx: ~30 lines (terrain system, circular deps)
• packages/shared.mdx: ~50 lines (terrain generation)
• devops/troubleshooting.mdx: ~40 lines (build fixes, manifest validation)
• devops/docker.mdx: ~60 lines (production images)
• guides/deployment.mdx: ~50 lines (Vast.ai, CI/CD)
• wiki/game-systems/terrain.mdx: ~80 lines (parameter updates)
• wiki/game-systems/duel-arena.mdx: ~40 lines (visual enhancements)
• api-reference/terrain.mdx: ~300 lines (new file)
• guides/recent-updates.mdx: ~200 lines (new file)
• guides/repository-updates-summary.mdx: ~100 lines (this file)