Harness
Agent Team & Skill Architect — A Claude Code Plugin
A meta-skill that designs domain-specific agent teams, defines specialized agents, and generates the skills they use.
Overview
Harness leverages Claude Code's agent team system to decompose complex tasks into coordinated teams of specialized agents. Say "build a harness for this project" and it automatically generates agent definitions (.claude/agents/) and skills (.claude/skills/) tailored to your domain.
Star History
Key Features
- Agent Team Design — 6 architectural patterns: Pipeline, Fan-out/Fan-in, Expert Pool, Producer-Reviewer, Supervisor, and Hierarchical Delegation
- Skill Generation — Auto-generates skills with Progressive Disclosure for efficient context management
- Orchestration — Inter-agent data passing, error handling, and team coordination protocols
- Validation — Trigger verification, dry-run testing, and with-skill vs without-skill comparison tests
Workflow
Phase 1: Domain Analysis
↓
Phase 2: Team Architecture Design (Agent Teams vs Subagents)
↓
Phase 3: Agent Definition Generation (.claude/agents/)
↓
Phase 4: Skill Generation (.claude/skills/)
↓
Phase 5: Integration & Orchestration
↓
Phase 6: Validation & Testing
Installation
Via Marketplace
Add the marketplace
/plugin marketplace add revfactory/harness
Install the plugin
/plugin install harness@harness
Direct Installation as Global Skill
# Copy the skills directory to ~/.claude/skills/harness/
cp -r skills/harness ~/.claude/skills/harness
Plugin Structure
harness/
├── .claude-plugin/
│ └── plugin.json # Plugin manifest
├── skills/
│ └── harness/
│ ├── SKILL.md # Main skill definition (6-Phase workflow)
│ └── references/
│ ├── agent-design-patterns.md # 6 architectural patterns
│ ├── orchestrator-template.md # Team/subagent orchestrator templates
│ ├── team-examples.md # 5 real-world team configurations
│ ├── skill-writing-guide.md # Skill authoring guide
│ ├── skill-testing-guide.md # Testing & evaluation methodology
│ └── qa-agent-guide.md # QA agent integration guide
└── README.md
Usage
Trigger in Claude Code with prompts like:
Build a harness for this project
Design an agent team for this domain
Set up a harness
Execution Modes
| Mode | Description | Recommended For |
|---|---|---|
| Agent Teams (default) | TeamCreate + SendMessage + TaskCreate | 2+ agents requiring collaboration |
| Subagents | Direct Agent tool invocation | One-off tasks, no inter-agent communication needed |
Architecture Patterns
| Pattern | Description |
|---|---|
| Pipeline | Sequential dependent tasks |
| Fan-out/Fan-in | Parallel independent tasks |
| Expert Pool | Context-dependent selective invocation |
| Producer-Reviewer | Generation followed by quality review |
| Supervisor | Central agent with dynamic task distribution |
| Hierarchical Delegation | Top-down recursive delegation |
Output
Files generated by Harness: