Show HN: OpenKnowledge – open source AI-first alternative to Obsidian/Notion

OpenKnowledge, an open-source AI-first alternative to Obsidian/Notion, has been launched. It offers a WYSIWYG markdown editor with integrations to Claude, Codex, and other agents. The platform is available as a MacOS app or Web UI+CLI and includes features like collaborative editing, undo/redo, and version history. OpenKnowledge is fully free/local and OSS. Engineers can contribute to the project and provide feedback for future development.