Oct 2026 to present · Rust · Swift · Unix sockets
Agent Island
A native macOS notch app that monitors AI coding agents.
- Rust tests
- 180
- to the right terminal tab
- 1 click
- agents supported: Claude Code and Codex
- 2
What it is
Agent Island is a native macOS app that lives in the notch. It tracks local Claude Code and Codex sessions through their official hooks. Developers can approve tool calls, answer agent questions and jump to the exact terminal tab in one click.
How it is built
The core is written in Rust. It holds a session state machine, a local Unix-socket server and kqueue process watching. A C ABI bridges the core to a Swift and AppKit shell.
The core is covered by 180 Rust tests, including end-to-end hook runs.