Impeccable: open-source design skill with 62 checks for AI agents

Impeccable gives AI coding agents 24 commands and 62 deterministic rules that flag the typical AI-generated look: Inter fonts, purple gradients and nested cards. It works in Claude Code, Cursor, Codex and other tools, ships under Apache 2.0 and has passed 86,000 GitHub stars.

• 62 deterministic rules run without an LLM or API key
• 24 commands including polish, bolder, delight and audit
• Supports Claude Code, Cursor, Codex, Copilot and Gemini CLI
• Over 86,000 GitHub stars, Apache 2.0 license