Toolcairn Mcp

Connects Claude to a graph of 30,000+ tools across npm, PyPI, Cargo, Maven, and 35+ registries. Exposes 16 tools for natural-language search with health signals, side-by-side comparison, version compatibility checks, and stack composition with cross-version matrices. Scans your project manifests on init, writes a local `.toolcairn/` snapshot, and lets the agent track what's already installed. The search flow handles ambiguous intents with clarifying questions via `search_tools_respond`. Every accepted or rejected recommendation feeds back into the graph through `report_outcome`. Useful when your agent needs to pick libraries, upgrade dependencies without breaking peer ranges, or build a coherent stack instead of guessing from stale tutorials.