Create Harness

Create Harness is an AI Engineering skill for Claude Code, published by ruvnet in metaharness.

609 stars72 forkson ruvnet/metaharnessAdded 2026/08/25+2% in starsRepository updated 2026/08/24

agent-harnessagent-harness-generatoragent-scaffoldingagentic-aiagentic-frameworkautonomous-agentsclaude-codecodexcreate-agent-harnesshermes-agentmcpmcp-servermulti-agentopenai-codexopenclawpi-devrvmsandboxingscaffoldscaffolding

Install in seconds

Install Create Harness

Copy Create Harness into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/ruvnet/metaharness/tree/main/.claude-plugin/skills/create-harness ~/.claude/skills/create-harness

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/ruvnet/metaharness.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: .claude-plugin/skills/create-harness/SKILL.md in ruvnet/metaharness
Installs to: ~/.claude/skills/create-harness
Collection: One of 16 skills cataloged from this repository
Category: AI Engineering — 2451 skills

What Create Harness does

Create Harness scaffolds a focused AI agent harness with its own CLI, host config, memory namespace, and package metadata. Use it to build a custom assistant for Claude Code, Codex, pi.dev, or Hermes.

Create Harness is cataloged under AI Engineering on DirSkills. Create Harness comes from a repository tagged agent-harness, agent-harness-generator, agent-scaffolding, agentic-ai and agentic-framework.

Documentation

README

Excerpt

create-harness

This skill scaffolds an AI agent harness — your own focused, branded harness with its own npx <name> CLI, MCP server registration, memory namespace, learning loop, and marketplace identity.

When to use this skill

Use this skill when the user wants any of:

A custom MCP-server-backed AI assistant (legal, trading, support, ops, …)
A Claude Code plugin that bundles their own agents/skills/prompts
A Codex skill that wraps a kernel + tools
A pi.dev extension or Hermes agent runtime config
A standalone npm package they can npm publish under their own scope

This is the opening of the README. Read the full README on GitHub.

Commands Create Harness provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/create-harness

Frequently asked about Create Harness

What else does ruvnet publish alongside Create Harness?
Create Harness is one of 16 skills that DirSkills catalogs from ruvnet/metaharness, the repository it ships in. Its siblings there include Compare Harnesses, Darwin Mode and Diag Harness. Each one is a separate skill with its own page in this directory, installs the same way Create Harness does, and is maintained by ruvnet in that same repository. The rest of the collection is listed on the ruvnet/metaharness page.
How does Create Harness compare to other AI Engineering skills?
Create Harness ranks #1924 by stars among the 2451 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Create Harness against them. Open each page to compare what they document and how they install.