nano.md for macOS

A minimal Markdown reader/editor for mac

Read and edit SKILL.md, AGENTS.md, and the Markdown instructions you give your AI tools. Free, lightweight, and native to macOS.

Price: Free
App size: 4.0 MB
Platform: Native macOS

Released build: 0.1.0 (20), targeting macOS 15.0 or newer on Apple Silicon. Uncompressed app size.

Download beta for Mac Features

Agent instructions

Working agreements

Keep changes focused. Follow the existing project structure.

Read docs/architecture.md first.
Use the existing dependencies.
Review the diff before committing.

Before finishing, run:

npm run check

Example AGENTS.md document

Features

For the files behind your AI workflow.

Skills & agent files

Open SKILL.md and AGENTS.md from Finder. Switch between Read and Edit with Control-R, then save changes to the same file.

Small footprint

A small app bundle, free to use. No account or subscription.

Other Markdown, too

README files, project docs, and notes. The same native app for your other .md and .markdown files.

Download & source

Free. Try the beta.

Nano Dark and Linen Light themes, with Dark, Light, or System appearance. Compact SKILL.md metadata panels and direct Markdown source editing.

Compact bars and clearer toolbar icons keep your document in focus. Use Control-R to switch Read/Edit. The green Feedback footer link opens email options in your browser, and the feedback address is also in About nano.md.

Signed and notarized for Apple Silicon. Unzip the download and move NanoMD.app to Applications.

Download 0.1.0 beta 5 (2.23 MB ZIP). Release notes & checksum ↗

View source on GitHub ↗. MIT-licensed.

0.1.0 beta 5 Requires macOS 15.0 or newer on Apple Silicon. Runtime verification on macOS 15 remains pending.