fastroute
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@fastrouterecommend skills for sending email with Node.js"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
fastroute
Local MCP plugin: when an agent receives a new task, retrieve Top-N recommendations from all locally installed skills (user-level/plugin-level/project-level). It only recommends, never executes.
The indexing method comes from SkillRouter (arXiv 2603.22455): all-field segmented multi-vector (one vector for name+description + one vector for each ~800-character chunk of body text); for a query, cosine similarity is computed against each chunk, and skill scores are max-pooled.
Tools
Tool | Purpose |
| Retrieves the most relevant skill before a task starts; returns score, tier (auto/prompt/skip, reference values), invocation name and path |
| Incrementally rebuilds the index after installing/removing skills (mtime diff); no session restart needed |
Related MCP server: skills-mcp-server
Installation (Claude Code)
claude mcp add fastroute -- node /absolute/path/to/fastroute/dist/index.jsData and Models
Data directory
~/.fastroute(overridden byFASTROUTE_DATA_DIR):fastroute.db,config.json,models/Embedding model:
Xenova/paraphrase-multilingual-MiniLM-L12-v2(q8, ~135 MB), downloaded online when the tool is first invoked; defaults to the ModelScope mirror (FASTROUTE_EMBEDDING_HOSTcan point back tohttps://huggingface.co); if a~/.knowyoubetter/modelscache already exists, it is reused directlyThe model is a hard dependency: when offline and no cache is available, the tool returns an error and download instructions; there is no lexical fallback
config.json can override:
chunkSize(800),autoThreshold(0.9),promptThreshold(0.6),topK(5),userSkillsDir,pluginCacheDir,projectSkillsEnabledAfter changing
chunkSize, existing indexes are not automatically re-chunked: delete~/.fastroute/fastroute.dband then callreindex_skills
Development
npm install
npm test # 单测 + 集成(fake embedder,不联网)
npm run test:real # 真实 embedding 冒烟(首次下载模型)
npm run eval # distractor 评测:Hit@1/Hit@5/MRR
npm run build
npx @modelcontextprotocol/inspector node dist/index.jsThis server cannot be deployed
Maintenance
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