We scanned 17,000 Claude Code skills. 39% run shell commands - only 4% say so up front.

An AI skill is a Markdown file your coding agent reads and obeys. GitHub code search currently finds 74,192 SKILL.md files installed under .claude/skills/ in public repos. We pulled a sample of 461 of those repos (plus the official Anthropic, OpenAI, and Trail of Bits catalogs), ran a static capability scan over every skill, and aggregated what they can actually do. Sample: 392 repos with parseable skills, 17,065 skills (12,280 unique by content hash). Repos ranged from personal dotfiles to pro...