Claude Code multi-agent

Legion

Multi-CLI plugin that orchestrates 49 AI agent personalities (start → plan → build → review → ship) across Claude Code, Codex, Cursor, Copilot, Gemini, Antigravity, Kiro, Windsurf, OpenCode, Kilo, Aider + Kilo Code.

Install

Install
npx @9thlevelsoftware/legion --claude

Found in the project README. Check it for setup steps after installing.

From source
git clone https://github.com/9thLevelSoftware/legion.git

From the README

Give the shiny new thing a try at: https://9thlevelsoftware.github.io/legion-ascended

Legion

Orchestrate 49 AI specialist personalities across 10 AI CLI runtimes plus the Kilo Code plugin.
*"My name is Legion, for we are many."*

What It Does

Turn 49 isolated agent personalities into a coordinated legion. The native Legion entry point now depends on the runtime you install into. See the audited compatibility matrix in docs/runtime-audit.md before assuming /legion:* works everywhere.

Installation

Quick install (recommended)

Replace --claude with your runtime of choice:

Runtime Support Tiers

Local development

Prerequisites

- Node.js 18+
- One of the 10 AI CLI runtimes listed above or Kilo Code plugin support via --kilo-code (support tier varies by runtime)

Codex note

If you install with --codex, Legion writes its workflow files into .legion/, installs native prompt commands into .codex/prompts/ for local installs or ~/.codex/prompts/ for global installs, and also installs a legion bridge skill into .agents/skills/legion/.

- Local Codex installs appear as /project:legion-start, /project:legion-plan, /project:legion-build, and so on
- Global Codex installs appear as /prompts:legion-start, /prompts:legion-plan, /prompts:legion-build, and so on
- Legacy /legion:* aliases remain bridge-only fallbacks, and plain-language Legion intents still work

Repo-native Codex plugin

This repository now also ships a repo-native Codex plugin manifest at .codex-plugin/plugin.json.

- Use the repo-native plugin path when you want Codex to load Legion directly from this checkout as a local plugin bundle
- The repo-native plugin exposes a top-level legion bridge skill at skills/legion/SKILL.md, which routes plain-language Legion requests and legacy /legion:* intents to the…
Read the full README on GitHub

Details

Language
JavaScript
Last updated
16 September 2026

FAQ

What is Legion?

Multi-CLI plugin that orchestrates 49 AI agent personalities (start → plan → build → review → ship) across Claude Code, Codex, Cursor, Copilot, Gemini, Antigravity, Kiro, Windsurf, OpenCode, Kilo, Aider + Kilo Code. It is a multi-agent for Claude Code, from 9thLevelSoftware/legion on GitHub.

How do I install Legion?

Run npx @9thlevelsoftware/legion --claude, then follow the setup in the README.

Is Legion popular?

9thLevelSoftware/legion has 82 GitHub stars and 9 forks. It was last updated on 16 September 2026.

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