DocBot
Opening an unfamiliar codebase usually means clicking through files until the architecture slowly exists in your head. I wanted DocBot to do that first pass for me.
It scans the repository, groups the code into logical scopes, uses Tree-sitter to pull out symbols and dependencies, then sends parallel explorer agents into those scopes. Their findings get combined into a graph.

The explorer lets you follow that graph. There is also a guided tour that walks through the codebase and links each explanation to the files it is talking about.
A tour through the data models, authentication, and API endpoints. Excerpt from the team's demo.
A graph can go stale just like a README. DocBot has status and diff commands to show what has changed in the code, and git hooks to automatically trigger updates to its graph.