What's the best self hosted for ingesting a local codebase and wiki to ask questions of it? Some of the projects linked here have ingest scripts for doc, pdf fi

What's the best self hosted for ingesting a local codebase and wiki to ask questions of it? Some of the projects linked here have ingest scripts for doc, pdf files; but it'd be cool to ingest a whole git repo and wiki, have a little chat interface to ask questions about the code.