Agent Skills Index

Directory / Claude community plugins (Anthropic) / skillcheck-free

skillcheck-free

plugin Software development

SkillCheck Free validates Claude Code SKILL.md files against ~25 contract rules covering structure, naming, semantic consistency, and quality patterns. It catches missing frontmatter, weak or ambiguous descriptions, trigger collisions, anti-pattern formatting (prose where tables belong), naming smells, and contradictions before users encounter them. Runs locally — it's itself a SKILL.md the agent reads, with no API calls, binaries, or external services. MIT-licensed. Works in Claude Code, Claude Desktop/Web (Projects), and Cursor. The Free tier covers structural, semantic, and naming checks plus quality-pattern recognition. SkillCheck Pro (separate product at getskillcheck.com) adds anti-slop detection, security scanning, token budget analysis, WCAG accessibility, and enterprise readiness checks.
Description from the marketplace entry / plugin manifest.

Information source

Copied from the Claude community plugins (Anthropic) catalog (anthropics/claude-plugins-community), maintained by Anthropic (community submissions).

Links are pinned to commit 06ec7b6 (2026-10-13), the version we synced. Not reviewed by us.

Install

Add the marketplace (once, in Claude Code)
/plugin marketplace add anthropics/claude-plugins-community
In a Claude Code session
/plugin install skillcheck-free@claude-community
From your shell
claude plugin install skillcheck-free@claude-community

Commands follow each host's documentation (Claude Code, Claude Cowork docs). gh skill needs GitHub CLI 2.90 or later and is in public preview.

Listed from Anthropic (community submissions)'s catalog, not reviewed by us. Read the source before installing.

Catalog
Claude community plugins (Anthropic) (claude-community)
Information source
marketplace.json in anthropics/claude-plugins-community
Author
Not stated in the source
Source code
olgasafonova/SkillCheck-Free
Homepage
getskillcheck.com
License
MIT (repository license)
Repository stars
42 for olgasafonova/SkillCheck-Free
Added to catalog
2026-05-28
Last change
2026-10-11 (last push to the repo)

What it contains

Hosted in an external repository, so contents are not counted here. See the source link.

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