OpenKnowledge

OpenKnowledge is a local-first, AI-native markdown editor and LLM wiki. It provides a WYSIWYG editing experience for .md and .mdx files that feels closer to Google Docs or Notion than to a traditional text editor, while still keeping the underlying files as plain, git-trackable markdown.

The editor is built around LLM collaboration. It ships with first-class integrations for Claude (Claude Code), Codex, and Cursor, plus an MCP server, agent skills, and a CLI so any agent harness can read, edit, and search your knowledge base. Out of the box it works as a second brain and spec-driven development workspace for LLM wikis.

OpenKnowledge runs entirely on your machine. A native macOS app is available, and a Node.js-based web editor + CLI work on Linux, Windows, and Intel Macs. Team sharing and auto-sync are powered by GitHub under the hood, so there is no vendor lock-in and your notes stay in standard markdown you can open in Obsidian, VS Code, or any other tool. Compared to Notion, you get the same fluid editing and AI features without cloud storage fees or proprietary formats; compared to Obsidian, you get a more polished WYSIWYG experience and deeper agent integrations out of the box.