Open Knowledge

OpenKnowledge is an open source markdown editor built for both people and AI agents. It works as a rich text editor and a knowledge base, with files stored as plain markdown underneath, so a team can build wikis, notes and agent memory in a format any tool can read. The editor feels like a Notion style canvas. It supports callouts, accordions, tabs, Mermaid diagrams, images, video, tables, code and embeddable HTML, plus ready made and customizable templates. A visual markdown mode and a source view are both available, and a document shows word, character and token counts, which helps when content is meant to be read by a language model. The agent side is the point of the product. It ships built in tools and agent skills so assistants can read, write and edit documents, and the activity timeline records which agent changed which page and when. The site lists compatibility with Claude, Codex, Cursor, Gemini, Copilot, OpenClaw, OpenCode and dozens of other coding agents. The use cases named are knowledge bases, LLM wikis and second brains for agents. A desktop app is offered for Windows and other platforms from the download page. The site labels the project open source and lists no paid plans or prices.