You certainly could create an embedding of your code and then hooking it up to OpenWeb UI or equivalent as a chat interface - we've actually spoked to some teams that have rolled their own custom solution like that!

From a product POV: our main focus with Sourcebot is providing a world-class DX and UX so that it is really easy to use. Practically speaking, for DX: a sys-admin should be able to throw Sourcebot up into their cluster in minutes with minimal maintenance overhead. For UX: provide a snappy interface that is minimal and gets out of your way.

From a technology POV: vector embeddings (and techniques like graph-RAG) are definitely something we are going to investigate as a means of improving the agent's ability to find relevant context fast. Bringing in additional context sources (like git history, logs, GitHub issues, etc.) is also something we plan to investigate. It's a really fascinating problem :)

I was very excited for a strong off-the-shelf code vector embedding search tool.

I wanted to encourage you to explore that direction, since it's a) very powerful, b) annoying to hand-roll, and thus c) sorely needed as open source.