coleam00/Archon

The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.

About the project

Archon is a workflow engine for AI coding agents that turns development processes into YAML-defined sequences with phases, validation gates, and artifacts. Developers use it to run repeatable processes such as planning, implementation, testing, code review, and pull-request creation across projects. The catalogue entries provide commands, agents, skills, hooks, instructions, and settings for working with Archon.

Latest release v0.12.1 — Archon CLI v0.12.1 · 17 Oct 2026

55 files for Claude Code, Codex, OpenCode and GitHub Copilot: validate, code-reviewer, code-simplifier, codebase-analyst and 51 more — 3,696 tokens loaded in every session.

23,752Stars on the repository
55Files it configures its agents with
3,696Tokens loaded in every session
4Agents configured
▶ I Turned Claude Code Into a Complete Video Generation System (with Archon) Cole Medin · about coleam00/Archon · on YouTube →

Instructions

Settings

Hooks

Skills

Commands

Agents

These files are coleam00/Archon's own configuration — they tell Claude Code, Codex, OpenCode and GitHub Copilot how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.