Notchd 1.0.0

The first release of Notchd: a flight recorder and undo button for every AI coding agent on your Mac.

What it does

• Records every file Claude Code, Codex, Gemini CLI, OpenCode and Cursor touch and every command they run, through the hooks and plugins each agent already supports.
• Checkpoints the paths a tool call declares before it runs and diffs them after, into an append-only ledger and a content-addressed store.
• A timeline window shows one lane per session. Drag a span, see the files and a line diff, and revert it. A revert says complete only when every path was restored bit for bit.
• Guard mode blocks or asks before an agent runs a command or writes a path that matches one of your rules.
• A notch on any screen edge shows what is running. When an agent finishes it hops, peeks out with that agent's mark, taps the trackpad, and posts a silent notification.
• Nothing leaves the machine. There is no network code in any target.

Install

Open the disk image and drag Notchd to Applications. The app is signed but not notarized, so on first launch choose Open Anyway in System Settings > Privacy & Security, or run:

xattr -dr com.apple.quarantine /Applications/Notchd.app

Requires macOS 26 on Apple silicon.