Design principles
The file is the shared whiteboard
Section titled “The file is the shared whiteboard”You and your agent need one place you both can see and change. OpenMarkdown makes that place a plain .md file. The agent's memory, your notes, a plan you are working out together: all of it is in the file, where either of you can read it later, and where git can track it.
The app renders the file and gets out of the way. Close it and nothing is lost, because nothing lived in the app.
Bring your own agent
Section titled “Bring your own agent”OpenMarkdown ships no model, no chat and no "ask AI" button. You already have an agent you like; OpenMarkdown gives it a way to put a note in front of you, see what you are looking at, and edit exactly one section. When a better agent comes out, you switch agents, not editors.
Your files, not a library
Section titled “Your files, not a library”No database, no import, no account. OpenMarkdown opens folders you already have and writes back to the same files. Uninstall it and every note opens unchanged in any other editor. Where its Markdown differs from GitHub's, the difference is written down: Markdown dialect.
Never lose a keystroke
Section titled “Never lose a keystroke”An agent edits one section and never the whole file. If you and it touch the same section, its write is refused rather than yours. Changes made on disk while you type are merged. When something can't render, its source shows. Anything else would make it unsafe to let an agent near your notes.
The editor opens instantly and stays out of your way. Speed is what lets you and your agent stay on the same page: you see each change as it lands, not after a reload.
Honest
Section titled “Honest”The app does what its documentation says, on the platforms it says. What it sends over the network is listed in full on Privacy and transparency.