# Harness Plugin

> A team-architecture factory plugin for Claude Code that converts domain descriptions into coordinated agent teams using six pre-defined architectural patterns.

Harness is a Claude Code plugin / skill that acts as a **Team-Architecture Factory**, transforming a plain-language domain description into a fully structured agent team with specialized agents and skills. It operates at the L3 Meta-Factory layer of the Claude Code ecosystem, generating agent definitions (`.claude/agents/`) and skill files (`.claude/skills/`) tailored to your project domain. Simply say "build a harness for this project" and Harness runs a six-phase workflow — from domain analysis through validation — to produce a ready-to-use multi-agent configuration. It supports a built-in evolution mechanism that feeds real-world deltas back into the factory for continuous improvement.

- **Six Architecture Patterns** — *Choose from Pipeline, Fan-out/Fan-in, Expert Pool, Producer-Reviewer, Supervisor, and Hierarchical Delegation to match your task structure.*
- **Automatic Agent Definition Generation** — *Harness creates `.claude/agents/` files for each specialist agent in your team, complete with roles and responsibilities.*
- **Skill Generation with Progressive Disclosure** — *Auto-generates `.claude/skills/` files that manage context efficiently, reducing token overhead across agent interactions.*
- **Harness Evolution Mechanism** — *Use `/harness:evolve` to capture deltas between the initial and shipped architecture, feeding improvements back into the factory for better next-generation drafts.*
- **Two Execution Modes** — *Run in Agent Teams mode (default, using TeamCreate + SendMessage + TaskCreate) for multi-agent collaboration, or Subagents mode for one-off tasks.*
- **Validation & Testing** — *Built-in trigger verification, dry-run testing, and with-skill vs. without-skill comparison tests ensure generated harnesses work before deployment.*
- **Marketplace Installation** — *Install via `/plugin marketplace add revfactory/harness` and `/plugin install harness@harness`, or copy skills directly to `~/.claude/skills/harness/`.*
- **Multilingual Trigger Support** — *Activate Harness in English, Korean (하네스 구성해줘), or Japanese (ハーネスを構成して).*
- **Broad Use Case Coverage** — *Includes reference examples for deep research, full-stack development, code review, data pipelines, marketing campaigns, and more.*

## Features
- Six team architecture patterns: Pipeline, Fan-out/Fan-in, Expert Pool, Producer-Reviewer, Supervisor, Hierarchical Delegation
- Automatic agent definition generation (.claude/agents/)
- Skill generation with Progressive Disclosure for context management
- Harness Evolution Mechanism via /harness:evolve
- Agent Teams and Subagents execution modes
- Trigger verification, dry-run testing, and comparison tests
- Marketplace and direct installation support
- Multilingual trigger support (English, Korean, Japanese)
- Six-phase workflow: Domain Analysis → Team Design → Agent Definition → Skill Generation → Integration → Validation

## Integrations
Claude Code, Claude Code Agent Teams, Claude Code Plugin Marketplace

## Platforms
API, CLI

## Pricing
Open Source

## Version
1.2.0

## Links
- Website: https://revfactory.github.io/harness/
- Documentation: https://github.com/revfactory/harness
- Repository: https://github.com/revfactory/harness
- EveryDev.ai: https://www.everydev.ai/tools/harness-plugin