DeepWiki

Cognition's (makers of Devin) auto-generated wiki for any public GitHub repo: swap github.com for deepwiki.com to get diagrams, prose, and an 'ask' chat, free for open source, no sign-up (private repos need a Devin account). It also exposes a remote MCP server so your agent can pull repo context, with tools read_wiki_structure, read_wiki_contents, and ask_question. Only as current as its last index, and it inherits RAG's confident-stale-recall failure, so scope it to reading and orientation.