Agent Skill library
Popular Agent Skills with install paths for Claude Code, Codex CLI, Cursor and Gemini CLI, a one-line symlink install and a browser-side SKILL.md checker.
Skill Creator
Creates new skills, improves existing ones and runs evals to measure how well a skill triggers and performs.
Frontend Design
Guidance for distinctive, intentional visual design when building or reshaping a UI: aesthetic direction, typography, avoiding templated defaults.
Web App Testing
Tests local web apps with Playwright: verifies frontend behaviour, debugs UI, captures screenshots and reads browser logs.
MCP Builder
A guide for building high-quality MCP servers in Python (FastMCP) or Node/TypeScript (MCP SDK).
Reads, extracts, merges, splits, fills and OCRs PDF files.
Skill folders by agent
| Agent | Project | Personal (all projects) | Source |
|---|---|---|---|
| Claude Code | .claude/skills/ | ~/.claude/skills/ | docs ↗ |
| Codex CLI | .agents/skills/ | ~/.agents/skills/ | docs ↗ |
| Cursor | .cursor/skills/ or .agents/skills/ | ~/.cursor/skills/ or ~/.agents/skills/ | docs ↗ |
| Gemini CLI | .gemini/skills/ or .agents/skills/ | ~/.gemini/skills/ or ~/.agents/skills/ | docs ↗ |
Verified 2026-10-14 against the linked official docs.
Check a SKILL.md before you install it
Runs in your browser; nothing is uploaded. It checks the frontmatter (name, description length) and flags hidden HTML comments, remote URLs, shell commands and referenced scripts so you know what to review.