Metis

Judgement

What it is

Developer tool

What it does

An open-source coding agent available as a desktop app, terminal tool or skill for Codex and OpenCode. It splits work across planning, coding, review and testing roles in a workflow graph that each project can edit, and drafts commit messages.

Adopt it when

You want a coding agent whose planning and review roles you can reconfigure per project.

Watch out

The README claims a 50 percent performance gain without published evidence, it needs a paid model provider, and it is under four months old.

Ready for

Experimental

Runs as

Desktop app and command line

Built with

TypeScript, Python and Node.js

How established

New: started 3 months ago, latest release v2.0.2.

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: Metis → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

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