Macaroni: A Markdown viewer that shows what changed since you read it

Hi Product Hunt, I'm Tony, and I make Macaroni at Noodle Dragon Studio in New Zealand. A lot of the Markdown I read now was written by something else: plans, specs and reports that Claude Code leaves in a project while I'm away from the terminal. A normal viewer renders the file. What I wanted to know was which files changed since I last looked, and what moved inside each one. So Macaroni does two things on top of being a plain viewer: - The Changed feed. Open a folder and the files written since you last read them wait at the top of the sidebar, newest first, with a dot. It remembers what you've read across quits, so changes made while it was closed are still there. - What Changed (Shift-Command-D). A line by line diff against the version you last read. Not against a commit, so no git involved. The outline beside it lists the sections the changes are in. It never writes to a Markdown file, so it can't fight an agent for one. It's sandboxed, there's no account and no telemetry, and the only thing it loads from the web is an image a document itself links to. It's $14.99 once on the Mac App Store. The App Store has no trials for one-time purchases, so if it doesn't fit, Apple handles refunds. I'd like to hear what you'd want it to do next.