Open-source toolkit for [Cloudflare AI Search](https://developers.cloudflare.com/ai-search/): 1. **MCP Worker** (`src/mcp.ts`) -- bearer-gated Streamable-HTTP MCP with a `search` tool for agents. 2. **Query Worker** (`src/index.ts`) -- CORS + Turnstile + rate-limited `POST /ask` that streams answers for a browser widget.