Launching today
MRDown
Read the Markdown your AI just rewrote
7 followers
Read the Markdown your AI just rewrote
7 followers
MRDown is a macOS-native Markdown editor for a world where AI agents edit your files. When an agent rewrites your Markdown, it shows exactly what changed — as a diff — instead of silently swallowing it. Touch the same lines as the AI and you get a 3-way view: you choose what stays, and the agent's version lands in history as an external rewrite, not the truth. See how a doc changed over time, compare any two files with ⌘⇧D, and pick up where you left off. Free, MIT-licensed, and truly native.
Finally a markdown editor that treats agent edits like real edits instead of magic. The 3-way merge view when you touch the same lines is genuinely clever and feels built for how I actually work now.
@nazlcantenrjrj Thank you — "edits, not magic" is exactly the line I was hoping would land.
The 3-way view was actually the piece I didn't plan but couldn't ship without: two columns can't express a conflict, because there's no single "before" to compare against. So it only flags the lines you and the agent both rewrote differently — you're not re-reading the whole file to find the one spot that needs you.
Really glad it fits how you work. That's exactly who I built it for.
Hi Product Hunt 👋 I'm Hitoshi, the maker.
I build alongside coding agents all day, and they kept rewriting my Markdown files out from under me. I'd tick a box, the agent would rewrite the same section, and one of us would silently lose. I couldn't see what it had changed, and I couldn't stop it from clobbering my edits.
MRDown is a native macOS Markdown editor built around that one problem:
🟣 See what the AI did — as a diff. When an agent rewrites a file on disk, MRDown catches it and shows the change instead of silently reloading.
🟣 Don't get overwritten. When you and the agent touch the same lines, you get a 3-way view and choose. The AI's version isn't thrown away — it lands in history as an external rewrite.
🟣 Diff across time, not just against the last save.
🟣 Compare any two files with ⌘⇧D.
It's free, MIT-licensed, and truly native — not a web wrapper. Built with Tauri, and (fittingly) alongside Claude.
I'd genuinely love to hear from anyone else working with coding agents: does seeing the diff change how much you trust them? Happy to answer anything in the comments 🙏
Love that diff-first approach, exactly the trust layer AI editing has been missing. One thing that would make this a daily driver for me: a quick toggle to compare against a Git branch or commit instead of just another local file, so I can review what an agent pushed before I merge.
The 3-way merge view treating AI rewrites as external history rather than canonical truth is a really thoughtful design choice. Most editors just paste over your work and call it collaboration, so this actually respects authorship.