Inkeep Open-Sources OpenKnowledge, a Local-First Markdown Editor

Inkeep open-sourced OpenKnowledge this week, a free WYSIWYG markdown editor with Claude Code, Codex, and Cursor wired in through MCP, per a Hacker News thread.

That matters for anyone who keeps notes in markdown. Agents can read and rewrite files directly, and none of that traffic has to leave your machine to do it.

The pitch is a local-first alternative to Notion and Obsidian, but built for a world where an agent does half your editing. Instead of pasting content into a chat window or waiting on a cloud sync, the editor exposes your files over MCP so Claude Code, Codex, or Cursor can open them, change them, and hand control back to you.

I keep my own knowledge base in markdown, so an editor that skips the cloud round-trip for agent access is worth a test drive. It also fits a pattern I've been noticing lately: tools that used to assume a server in the middle are getting rebuilt to assume none.

Take

The editor part of OpenKnowledge isn't the interesting part. The interesting part is that local-first is turning into an actual requirement for agent-facing software, not a nice-to-have for privacy nerds. Watch whether Notion or Obsidian answer with their own MCP-native local mode, or whether tools like this pick off the agent-heavy users instead.

It's landing right as more builders start asking what their AI tools quietly send upstream, and OpenKnowledge answers that question by not sending anything.