Anvil & Code — Free

Audits SKILL.md files for structural issues, missing fields, weak triggering descriptions, and marketplace-readiness. Returns a scored report with a specific fix for every issue found.

Most Claude skills don't fail because the instructions are bad. They fail because:

• The description is too short or too vague to trigger reliably
• Required fields are missing from the frontmatter
• The output format is never specified, so Claude invents one
• Placeholder text was never replaced

The validator catches all of this before you ship.

1. Download SKILL.md from this package
2. Go to claude.ai → Projects → your project
3. Click Add content and upload SKILL.md
4. Paste your skill file into a chat and say: "Validate this skill"

A scored report (0–10) with:

• Critical issues — things that will break the skill entirely
• Warnings — things that will make the skill unreliable
• Triggering score (X/9) — the single most important metric
• What's working well — so you know what not to change
• Recommended next step — one clear action, not a list of ten

skill-validator and description-optimizer are permanently free from Anvil & Code. Good tools make the whole ecosystem better.

Anvil & Code — Production-grade Claude skills for builders.