Catryna Wikinelli_
Documentation that lives with the code—and gets used.
A local-first code wiki where coding agents maintain MDX documentation as part of the development session and teams browse it through a visual viewer.
How it works
Read repository docs
Update during the session
Review the change in Git
The problem
Important repository knowledge often lives in chat history, a stale external wiki, or one engineer’s memory. Updating documentation becomes a separate chore, so the system drifts away from the code it describes.
Catryna changes the incentive. Coding agents read repository documentation before changing code and update it during the same session. The documentation is made of ordinary MDX files, so it is versioned, reviewed, and portable with the repository.
One source for agents and humans
Agents read .docs/ directly and write through MCP tools for creating, updating, searching, and measuring coverage. Humans browse the same files in a React viewer with search, Mermaid and React Flow diagrams, whiteboards, and documentation coverage reporting.
There is no cloud database. Documentation stays in Git and can be edited by hand with ordinary tools.
Dogfooded by design
Catryna documents itself. Its own .docs/ directory provides working examples of architecture documentation, backend notes, diagrams, and contributor guidance.
Current status
Catryna is early-stage v1.0 software, MIT licensed, and designed to work with Claude Code or any MCP-capable coding environment.