eval-harness

Formalize AI feature validation with configurable eval structures and graders.

Updated Jan 18, 2026
One-click install
npx skills add https://github.com/BenjaminRose805/react-basecamp --skill eval-harness-benjaminrose805
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: eval-harness
Source: https://github.com/BenjaminRose805/react-basecamp/tree/main/.claude/skills/core/eval-harness
Command: npx skills add https://github.com/BenjaminRose805/react-basecamp --skill eval-harness-benjaminrose805

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill provides a formal evaluation framework to validate Claude Code sessions using Evaluation-Driven Development (EDD) principles, turning evaluation into a first-class artifact that guides design and implementation.

Core Features & Use Cases

  • Evaluation-driven tests for agent configurations and prompts
  • Pluggable grader system (Code-Based, Model-Based, Human) to quantify safety and correctness
  • Structured eval layout (config, cases, graders) to enable repeatable verification across features and releases

Quick Start

To get started, configure your eval directory (config.ts, cases/, graders/), then run a full suite such as pnpm eval agent-builder and review the results.

Frequently Asked Questions about eval-harness

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

FAQPage Schema
How do I set up evaluation-driven development for AI agents?

An eval harness validates AI features by formalizing evaluations through config, cases, and graders. It enables deterministic and model-based assessments to verify correctness and safety across prompts and agent configurations.

How do I run an evaluation suite for a Claude Code project?

Configure the eval directory with config.ts, cases, and graders, then run a suite like `pnpm eval agent-builder`. The harness integrates with the /implement workflow to apply graders and review assessment results.

Can I use model-based grading for AI safety checks?

Yes, you can use model-based grading for AI safety checks. The framework supports a pluggable grader system including Code-Based, Model-Based, and Human graders to quantify safety and correctness across features.

Does this evaluation framework work without external dependencies?

Yes, the evaluation framework works without external dependencies. It uses a configurable internal structure of config, cases, and graders to enable repeatable verification directly within Claude Code projects.

What is the best way to structure tests for AI feature validation?

The best way to structure AI feature validation tests is using a formal eval layout separating config, cases, and graders. This enables repeatable verification and integrates testing pipelines with implementation workflows.