Cloud Codex is a documentation platform with real-time collaborative editing that you can fully self-host.

It supports:

Multiplayer editing via CRDTs (Yjs) Organizations, teams, and granular permissions Inline comments and threaded discussions Version history with restore Markdown and WYSIWYG editing Import/export (DOCX, PDF, HTML)

Stack: React, Express, MySQL, WebSockets

Runs locally with Docker (single DB container + Node app).

GitHub: https://github.com/Cloud-City-Computing/c2

Would appreciate feedback.