Use when user asks to 'lint agent configs', 'validate skills', 'check CLAUDE.md', 'validate hooks', 'lint MCP'. Validates agent configuration files against 702 rules across 10+ AI tools.
Install
npx skills add agent-sh/agnix --skill agnixnpx skills add agent-sh/agnix --skill agnix -a claude-code -gnpx skills add agent-sh/agnix --skill agnix -a codex -ggemini skills install https://github.com/agent-sh/agnix.git --path plugin/skills/agnixgh skill install agent-sh/agnix agnixgit clone --depth 1 https://github.com/agent-sh/agnix /tmp/agent-sh__agnix
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/agent-sh__agnix/plugin/skills/agnix ~/.claude/skills/agnix # Claude Code
cp -R /tmp/agent-sh__agnix/plugin/skills/agnix ~/.agents/skills/agnix # Codex, Cursor, Gemini CLI, Copilot, OpenCode