OpenKnowledge

OpenKnowledge is positioned as "Notion meets VS Code" — a true WYSIWYG editor for Markdown and MDX files, with a file navigator, tabs, search, and a graph/wiki-link viewer. It is licensed under GPL-3.0-or-later, ships as a native macOS app and a Node-based web UI, and is local-first: your files stay as plain markdown on disk rather than inside a proprietary database.

OpenKnowledge is designed AI-native: it ships with an MCP server, agent skills, and embeddings-based agentic search out of the box. You get side-by-side AI editing with Claude, Codex, Cursor, OpenCode, and Pi, and the ok init command wires those harnesses up automatically. It's explicitly marketed as a shared "agent brain" that agents can read from and write to.

Yes — OpenKnowledge supports 1-click sharing for individual docs and whole workspaces, with git/GitHub-backed sync under the hood. That means history, ownership, and conflict resolution live in your existing git repo rather than on a vendor server. Because the app is local-first, sharing is opt-in and you keep control of where the canonical copy lives.

On macOS, download the DMG from the GitHub releases page and drag it into Applications. On Linux, Windows, or Intel Macs, install the CLI via npm install -g @inkeep/open-knowledge (requires Node.js 24+ and git), then run ok init in a folder of markdown files and ok start --open to launch the web editor. The app works against any folder of existing markdown — Obsidian vaults, codebases, or plain notes.