Calyx

Judgement

What it is

Complete system

What it does

A native macOS terminal built on Ghostty for running several coding agents (Claude Code, Codex, OpenCode and others) side by side. It shows each agent's status, collects their permission prompts in one inbox and offers inline diff review.

Adopt it when

You run multiple coding agents in parallel on an Apple Silicon Mac and keep losing track of which one is waiting for you.

Watch out

It needs macOS 26 on Apple Silicon only, and the agent integrations track fast-changing third-party tools.

Ready for

Usable

Runs as

Desktop app

Built with

Swift, Rust, C and Ghostty

How established

Young: started 8 months ago, latest release v0.50.1.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Calyx → Swift → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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