ai-evals

Design AI/LLM feature evaluation plans with test sets, rubrics, and judging approaches.

5|Updated Jan 19, 2026
One-click install
npx skills add https://github.com/oldwinter/skills --skill ai-evals
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: ai-evals
Source: https://github.com/oldwinter/skills/tree/main/lenny-skills/ai-evals
Command: npx skills add https://github.com/oldwinter/skills --skill ai-evals

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a structured framework for designing and executing evaluations of AI/LLM features, ensuring quality, safety, and performance before deployment.

Core Features & Use Cases

  • Eval PRD Creation: Define clear evaluation requirements, scope, and acceptance thresholds.
  • Test Set & Taxonomy Development: Build golden test sets and error taxonomies from failure analysis.
  • Rubric & Judge Planning: Design scoring rubrics and select appropriate judging approaches (human, LLM-as-judge).
  • Use Case: You've developed a new AI assistant for customer support. Use this Skill to create a comprehensive evaluation plan, including test cases, a scoring rubric, and a process for analyzing results to ensure it meets quality and safety standards before launch.

Quick Start

Use the ai-evals skill to design an evaluation plan for a new AI feature.

Frequently Asked Questions about ai-evals

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

FAQPage Schema
How do I design an LLM evaluation for a new AI feature?

Designing an LLM evaluation requires a structured process to define evaluation requirements, create golden test sets, develop scoring rubrics, and plan judging harnesses for quality assurance.

What is an error taxonomy and when do I need it for AI testing?

An error taxonomy categorizes failure modes identified during LLM testing. You need it to structure error analysis and build targeted golden test sets that ensure AI quality and safety before deployment.

How do I create a scoring rubric for LLM-as-judge evaluations?

Creating a scoring rubric for LLM-as-judge involves defining specific evaluation criteria and acceptance thresholds. This structured approach ensures consistent quality gates and reliable automated judging harnesses.

What's the best way to build a golden test set for AI evaluation?

The best way to build a golden test set is through failure analysis, mapping outputs to an error taxonomy. This operationalizes AI evaluation by providing a structured benchmark for measuring LLM quality.

Can I define acceptance thresholds for AI features before deployment?

Yes, you can define acceptance thresholds by creating an evaluation PRD. This document establishes clear scope and quality gates to confidently verify that AI features meet safety and performance standards.

Why does my LLM testing process lack consistent quality assurance?

LLM testing lacks consistent quality assurance without a structured evaluation framework. Operationalizing rubric design, error analysis, and judging harnesses establishes the necessary quality gates for confident shipping.