impeccable Hits 50,392 Stars Shipping Design Taste as an Installable Skill — 23 Commands and 60 Deterministic Detector Rules Across 13 Agent Harnesses

GitHub·high signal

pbakaus/impeccable (50,392 stars, +471 today, 3,000 forks, 1,174 commits, Apache 2.0) from Paul Bakaus is a design-language skill that installs into Cursor, Claude Code, Copilot, Gemini CLI, Codex CLI, Grok Build, OpenCode, Pi, Kiro, Trae, Rovo Dev, Qoder, and Mistral Vibe via `npx impeccable install`. It combines PRODUCT.md/DESIGN.md guidance files with 23 commands, 60 deterministic detector rules, and live browser iteration, plus provider-native hook manifests. The deterministic-detector half is what separates it from a prompt pack — rules that fire without a model call are checkable, and 50K stars says the market for 'stop my agent producing AI-looking UI' is large.