Score Harness

Score 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 Score Harness

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

What Score Harness does

Score Harness assigns scaffolded harnesses a 0-100 grade across repo understanding, agent usefulness, MCP safety, test coverage, and publish readiness. It also emits a 6-field badge block and exit codes for A/B, C, and F results.

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

Documentation

README

Excerpt

score-harness

Codex skill: 5-dimension harness scorecard with README-ready badges (iter 111 → iter 114).

What it does

Every generated harness gets a single 0-100 score and a 6-field badge block. The user roadmap target: A grade (>=85) without manual edits.

Dimension	Weight	Reads
Repo understanding	25%	`.harness/manifest.json` (surface + kernel_version + host)
Agent usefulness	25%	`src/agents/.ts` + `.claude/skills/` + `.claude/commands/*` counts
MCP safety	20%	`.harness/mcp-policy.json` (default-deny + audit + perm gates)
Test coverage	15%	`__tests__/` + `npm test` + `.github/workflows/`
Publish readiness	15%	`witness.json` + `sbom.json` + `package.json#bin`

Grade + exit code:

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

Commands Score Harness provides

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

/score-harness

Frequently asked about Score Harness

What else does ruvnet publish alongside Score Harness?
Score Harness is one of 16 skills that DirSkills catalogs from ruvnet/metaharness, the repository it ships in. Its siblings there include Compare Harnesses, Create Harness and Darwin Mode. Each one is a separate skill with its own page in this directory, installs the same way Score 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 Score Harness compare to other AI Engineering skills?
Score Harness ranks #1929 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 Score Harness against them. Open each page to compare what they document and how they install.