Ritemark

Ritemark is a desktop writing app for Mac and Windows. You write in plain markdown files in a folder on your computer, with a visual editor, and your AI works in the same files: you ask in plain words and it writes, edits and creates documents in place. Each window is one folder with its own conversations, instructions, agents and skills. It has a built-in terminal, comments you can send to the AI, Mermaid and draw.io diagrams, and export to Word, PDF and Google Docs. Free and open source (MIT).