Agent skill · writing content · erichowens
skill-grader
Evaluates Claude Agent Skills on 10 quality axes with letter grades (A+ through F) and specific improvement recommendations. Use when auditing a skill, comparing skills, prioritizing improvements,
Why this skill is useful
Provides a structured evaluation framework for assessing skill quality that the AI wouldn't generate on its own.
What it needs
About 7k tokens when loaded. Last updated 2026-07-14. 180 stars on the source repository.
What this skill does
Skill Grader Structured evaluation rubric for Claude Agent Skills. Produces letter grades (A+ through F) on 10 axes plus an overall grade, with specific improvement recommendations for each axis. Designed for sub-agents and non-expert reviewers who need a mechanical, repeatable process for assessing skill quality without deep domain expertise. --- When to Use ✅ Use for: Auditing a single skill's quality Comparing skills against each other Prioritizing which skills to improve first Quality control sweeps across a skill library Generating improvement roadmaps ❌ NOT for: Creating new skills (use skill-architect) Grading code quality or non-skill documents Evaluating agent performance (different from skill quality) --- Grading Process Step-by-Step 1. Read the entire skill folder — SKILL.md, all references, scripts, CHANGELOG, README 2. Score each axis — Use the rubric below (0-100 per axis) 3. Convert to letter grade — See grade scale 4. Compute overall grade — Weighted average (Description and Scope are 2x weight) 5. Write 1-3 specific improvements per axis scoring below B+ 6. Produce the grading report in the output format below --- The 10 Evaluation Axes Axis 1: Description Quality (Weight: 2x) Does the description follow [What] [When] [Keywords]. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills erichowens/skill-grader