mcmodding-mcp

# mcmodding-mcp [](https://www.npmjs.com/package/mcmodding-mcp) [](https://opensource.org/licenses/MIT) [](https://github.com/OGMatrix/mcmodding-mcp/actions/workflows/ci.yml) > MCP server providing AI assistants with comprehensive, up-to-date Minecraft modding documentation for Fabric and NeoForge. ## What is this? **mcmodding-mcp** is a [Model Context Protocol (MCP)](https://modelcontextprotocol.io/) server that gives AI assistants like Claude direct access to Minecraft modding documentation. Instead of relying on potentially outdated training data, your AI assistant can search real documentation, find code examples, and explain concepts accurately. ### Key Benefits - **Always Current** - Documentation is indexed weekly from official sources - **Accurate Answers** - AI responses backed by real documentation, not hallucinations - **Code Examples** - Searchable code blocks with proper context - **Semantic Search** - Understands what you mean, not just keywords - **Zero Config** - Works immediately after installation ### 📚 Knowledge Base Stats Our documentation database (`mcmodding-docs.db`) is comprehensive and constantly updated: - **1,000+** Documentation Pages - **185,000+** Searchable Chunks - **8,500+** Logical Sections - **185,000+** Vector Embeddings for Semantic Search This ensures that even obscure API details can be found via semantic search. --- ## Quick Start ### Installation ```bash # Install globally npm install -g mcmodding-mcp ``` ### Configure Your AI Client Add to your MCP client configuration (e.g., Claude Desktop): ```json { "mcpServers": { "mcmodding": { "command": "mcmodding-mcp" } } } ``` ### 🧠 Optimized System Prompt To get the best results, we recommend adding this to your AI's system prompt or custom instructions: > You are an expert Minecraft Modding Assistant connected to `mcmodding-mcp`. **DO NOT rely on your internal knowledge** for modding APIs (Fabric/NeoForge) as they change frequently. **ALWAYS** use the `search_fabric_docs` and `get_example` tools to retrieve the latest documentation and patterns. Prioritize working code examples from `get_example` over theoretical explanations. If the user specifies a Minecraft version, ensure all retrieved information matches that version. That's it! Your AI assistant now has access to Minecraft modding documentation. --- ## Database Management Manage your documentation databases with the built-in CLI: ```bash # Run the database manager npx mcmodding-mcp manage ``` The interactive manager allows you to: - **Install** - Download databases you don't have yet - **Update** - Check for and apply database updates - **Re-download** - Restore deleted or corrupted databases ### Available Databases | Database | Description | Size | | -------------------------- | ----------------------------------------------------------- | ------- | | **Documentation Database** | Core Fabric & NeoForge documentation (installed by default) | ~520 MB | | **Mod Examples Database** | 1000+ high-quality modding examples | ~30 MB | The manager shows version information and highlights available updates: ``` ◉ 📚 Documentation Database [core] ✔ Installed: v0.2.1 → ↻ Update: v0.2.2 [52.3 MB] Core Fabric & NeoForge documentation - installed by default ○ 🧩 Mod Examples Database ⚠ Not installed → Available: v0.1.0 [28.1 MB] 1000+ high-quality modding examples for Fabric & NeoForge ``` --- ## Available Tools The MCP server provides four powerful tools: ### `search_fabric_docs` Search documentation with smart filtering. ```typescript // Example: Find information about item registration { query: "how to register custom items", category: "items", // Optional filter loader: "fabric", // fabric | neoforge minecraft_version: "1.21.4" // Optional version filter } ``` ### `get_example` Get working code examples for any topic. ```typescript // Example: Get block registration code { topic: "custom block with block entity", language: "java", loader: "fabric" } ``` ### `explain_fabric_concept` Get detailed explanations of modding concepts with related resources. ```typescript // Example: Understand mixins { concept: 'mixins'; } ``` ### `get_minecraft_version` Get current Minecraft version information. ```typescript // Get latest version { type: 'latest'; } // Get all indexed versions { type: 'all'; } ``` --- ## Features ### Hybrid Search Engine Combines multiple search strategies for best results: | Strategy | Purpose | | ----------------------- | --------------------------------------- | | **FTS5 Full-Text** | Fast keyword matching with ranking | | **Semantic Embeddings** | Understanding meaning and context | | **Section Search** | Finding relevant documentation sections | | **Code Search** | Locating specific code patterns | ### Auto-Updates The database automatically checks for updates on startup: - Compares local version with GitHub releases - Downloads new versions with hash verification - Creates backups before updating - Non-blocking - server starts immediately ### Documentation Sources Currently indexes: - [wiki.fabricmc.net](https://wiki.fabricmc.net) - Fabric Wiki (226+ pages) - [docs.fabricmc.net](https://docs.fabricmc.net) - Official Fabric Docs (266+ pages) - [docs.neoforged.net](https://docs.neoforged.net) - NeoForge Docs (512+ pages) --- ## For Developers ### Development Setup ```bash # Clone repository git clone https://github.com/OGMatrix/mcmodding-mcp.git cd mcmodding-mcp # Install dependencies npm install # Run in development mode npm run dev ``` ### Build Commands ```bash # Development npm run dev # Watch mode with hot reload npm run typecheck # TypeScript type checking npm run lint # ESLint npm run test # Run tests npm run format # Prettier formatting # Production npm run build # Build TypeScript npm run build:prod # Build with fresh documentation index npm run index-docs # Index documentation with embeddings # Database Management npx mcmodding-mcp manage # Interactive database installer/updater ``` ### Project Structure ``` mcmodding-mcp/ ├── src/ │ ├── index.ts # MCP server entry point │ ├── db-versioning.ts # Auto-update system │ ├── indexer/ │ │ ├── crawler.ts # Documentation crawler │ │ ├── chunker.ts # Text chunking │ │ ├── embeddings.ts # Semantic embeddings │ │ ├── store.ts # SQLite database │ │ └── sitemap.ts # Sitemap parsing │ ├── services/ │ │ ├── search-service.ts # Search logic │ │ └── concept-service.ts # Concept explanations │ └── tools/ │ ├── searchDocs.ts # search_fabric_docs handler │ ├── getExample.ts # get_example handler │ └── explainConcept.ts # explain_fabric_concept handler ├── scripts/ │ └── index-docs.ts # Documentation indexing script ├── data/ │ ├── mcmodding-docs.db # SQLite database │ └── db-manifest.json # Version manifest └── dist/ # Compiled JavaScript ``` ### Database Schema ```sql -- Documents: Full documentation pages CREATE TABLE documents ( id INTEGER PRIMARY KEY, url TEXT UNIQUE NOT NULL, title TEXT NOT NULL, content TEXT NOT NULL, category TEXT NOT NULL, loader TEXT NOT NULL, -- fabric | neoforge | shared minecraft_version TEXT, hash TEXT NOT NULL -- For change detection ); -- Chunks: Searchable content units CREATE TABLE chunks ( id TEXT PRIMARY KEY, document_id INTEGER NOT NULL, chunk_type TEXT NOT NULL, -- title | section | code | full content TEXT NOT NULL, section_heading TEXT, code_language TEXT, word_count INTEGER, has_code BOOLEAN ); -- Embeddings: Semantic search vectors CREATE TABLE embeddings ( chunk_id TEXT PRIMARY KEY, embedding BLOB NOT NULL, -- 384-dim Float32Array dimension INTEGER NOT NULL, model TEXT NOT NULL -- Xenova/all-MiniLM-L6-v2 ); -- FTS5 indexes for fast text search CREATE VIRTUAL TABLE documents_fts USING fts5(...); CREATE VIRTUAL TABLE chunks_fts USING fts5(...); ``` --- ## Release Workflow This project uses [release-please](https://github.com/googleapis/release-please) for automated releases. ### Branch Strategy | Branch | Purpose | | ------ | ------------------- | | `dev` | Active development | | `prod` | Production releases | ### How It Works 1. Push commits to `dev` using [conventional commits](https://www.conventionalcommits.org/) 2. Release-please maintains a Release PR (`dev` → `prod`) 3. When merged, automatic release: npm publish + GitHub release + database upload 4. Changes sync back to `dev` See [RELEASE_WORKFLOW.md](RELEASE_WORKFLOW.md) for complete details. --- ## Configuration ### Environment Variables | Variable | Description | Default | | ----------------- | ----------------------- | -------------------------- | | `DB_PATH` | Custom database path | `./data/mcmodding-docs.db` | | `GITHUB_REPO_URL` | Custom repo for updates | Auto-detected | | `MCP_DEBUG` | Enable debug logging | `false` | ### Disabling Auto-Updates Set `DB_PATH` to a custom location to manage updates manually: ```bash DB_PATH=/path/to/my/database.db mcmodding-mcp ``` --- ## Contributing We welcome contributions! See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines. ### Quick Contribution Guide 1. Fork the repository 2. Create a feature branch from `dev` 3. Make changes with conventional commits 4. Submit a PR to `dev` --- ## License MIT License - see [LICENSE](LICENSE) for details. ## Changelog See [CHANGELOG.md](CHANGELOG.md) for a detailed history of changes and releases. --- ## Acknowledgments - [Fabric Documentation](https://docs.fabricmc.net/) - Official Fabric documentation - [Fabric Wiki](https://wiki.fabricmc.net/) - Community wiki - [Model Context Protocol](https://modelcontextprotocol.io/) - MCP specification - [Transformers.js](https://huggingface.co/docs/transformers.js) - Local ML embeddings - [better-sqlite3](https://github.com/WiseLibs/better-sqlite3) - Fast SQLite bindings --- <p align="center"> <strong>Built with care for the Minecraft modding community</strong> </p>