Eval Harness Skill

Implement formal evaluation frameworks for AI development with code-based, model-based, and human graders.

1|Updated Jan 24, 2026
One-click install
npx skills add https://github.com/ShunmeiCho/claude-config --skill eval-harness-skill-shunmeicho
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: Eval Harness Skill
Source: https://github.com/ShunmeiCho/claude-config/tree/main/config/skills/eval-harness
Command: npx skills add https://github.com/ShunmeiCho/claude-config --skill eval-harness-skill-shunmeicho

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill provides a structured framework for evaluating AI model performance, ensuring reliability and tracking regressions through formal evaluation processes.

Core Features & Use Cases

  • Eval-Driven Development (EDD): Implement evals before coding to define success criteria.
  • Capability & Regression Evals: Differentiate between testing new features and ensuring existing functionality remains intact.
  • Multiple Grader Types: Utilize code-based, model-based, and human graders for comprehensive evaluation.
  • Metrics Tracking: Monitor pass@k and pass^k metrics to quantify reliability.
  • Use Case: Before implementing a new user authentication feature, define capability evals for registration and login, and regression evals for existing public routes. Then, use the skill to run these evals during and after implementation to ensure the feature works as expected and doesn't break anything else.

Quick Start

Use the eval harness skill to define a new capability evaluation for the 'user-registration' feature.

Frequently Asked Questions about Eval Harness Skill

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What is Eval-Driven Development and how does it prevent AI regressions?

Use code-based, model-based, and human graders to evaluate AI performance. This framework supports running capability evals for new features and regression evals to ensure existing functionality remains intact during AI development.

How do I set up capability and regression evaluations for a new feature?

Capability evals test new features while regression evals ensure existing functionality remains intact. You can define both types before implementation to establish success criteria, then execute them using code-based, model-based, or human graders.

How do pass@k and pass^k metrics quantify AI model reliability?

Pass@k and pass^k are key metrics tracked during AI evaluation to quantify model reliability. Monitoring these metrics throughout development ensures that regressions are detected and prevented across capability and regression evals.

Can I use model-based graders alongside code-based graders for AI testing?

Yes, the formal AI evaluation framework supports code-based, model-based, and human graders simultaneously. Combining these grader types allows for comprehensive evaluation of both new capabilities and existing regressions.

What's the best way to track AI model performance and prevent regressions?

Implement a formal evaluation framework that tracks pass@k and pass^k metrics. By differentiating between capability and regression evals, you can systematically measure AI model performance and prevent regressions.