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Skill Doctor
Diagnose, evaluate, and fix your Claude Code skills.
The Problem
Writing a Claude Code skill is easy. Writing a good one is not.
Thariq Shihipar published "Lessons from Building Claude Code: How We Use Skills" with 8 concrete tips for effective skills, gotchas sections, progressive disclosure, trigger-optimized descriptions, reusable scripts, and more.
Manually checking your skill against all 8 criteria is tedious.
Skill Doctor is a Claude Code plugin that automates it:
- Audit — Evaluate any skill against 9 criteria derived from the article. Get findings-first reports with file:line evidence, not just a verdict.
Install
Step 1 — Register the marketplace:
/plugin marketplace add JoaquinCampo/skill-doctor
Step 2 — Install the plugin:
/plugin install skill-doctor@skill-doctor-marketplace
Step 3 — Restart Claude Code.
That's it. The /skill-doctor skill is now available for auditing and improving skills.
What It Does
Audit Mode
Run /skill-doctor and point it at any skill. It will:
- Discover the skill directory (local or global)
- Explore every file — SKILL.md, references/, scripts/, config, hooks
- Classify into one of 9 categories (Library Reference, Product Verification, Runbook, etc.)
- Assess tier — Minimal, Standard, or Rich — so it doesn't penalize simple skills for missing features they don't need
- Run structural checks via a bundled bash script
- Evaluate against 9 criteria and produce a findings-first report with a verdict
Criteria
| # | Criterion | What it checks |
|---|---|---|
| 1 | Avoids stating the obvious | Does content push Claude beyond defaults? |
| 2 | Has Gotchas section | Are common failure points documented? |
| 3 | Uses progressive disclosure | Does folder structure spread context? |
| 4 | Avoids railroading | Is it flexible for varied situations? |
| 5 | Description optimized for triggering | Trigger conditions, not summary? |
| 6 | Setup/config pattern | Graceful first-time onboarding? |
| 7 | Includes scripts/code | Reusable scripts or libraries? |
| 8 | On-demand hooks | Session-scoped hooks registered? |
| 9 | Memory/data storage | Persists data between runs? |
Inapplicable criteria are marked N/A and skipped. A minimal skill with excellent content can be Strong.
Verdicts
| Verdict | Meaning |
|---|---|
| Strong | No high-severity findings. Follows the article's principles where they apply. |
| Adequate | Minor issues or missed opportunities, but functional and not misleading. |
| Needs Work | Material issues that would cause the skill to fail, mislead, or go unused. |
Contributing
git clone https://github.com/JoaquinCampo/skill-doctor.git
cd skill-doctor
Issues and PRs welcome. If you find a criterion that doesn't match real-world skill quality, open an issue — the rubric should evolve with the ecosystem.