gemchat indexes the documentation for the gems in your project's own bundle and serves BM25 search over it from the command line, with no account, no API key and no network. It is a local tool, not the hosted gemchat.org service. An optional mode can defer to gemchat.org if you would rather not keep a local index. Direct dependencies are indexed by default and ri documentation is generated locally, because Bundler installs gems without documentation. Results carry the exact locked version and real API signatures, which is the point: an agent can look up how to call a library without reading a 1500-line lockfile into context.