AI library

Source · repo

Impeccable: design vocabulary for coding agents

Author
Paul Bakaus
Added
4 November 2026
Original
https://github.com/pbakaus/impeccable

Summary

Impeccable (Apache-2.0) is a front-end design skill pack for coding agents that grew out of Anthropic's frontend-design skill. It gives the agent 24 named design commands for steering, reviewing, and finishing UI work, plus a deterministic detector for generic "AI slop" styling. On 2026-11-04 it was rising in GitHub trends (about 10,900 stars in a week, 101,700 total, 2,600+ commits).

Key points

  • Install: npx impeccable install, then /impeccable init in your agent (writes PRODUCT.md; $impeccable init on Codex). In Claude Code you can instead run /plugin marketplace add pbakaus/impeccable. Update with npx impeccable update. A VS Code extension (renaissance-geek.impeccable) and a no-Node manual copy also exist.
  • Use: /impeccable <command> <target>, for example /impeccable critique the pricing cards; /impeccable alone lists commands.
  • Commands: steer (bolder, quieter, distill, colorize, typeset, layout, animate, delight, overdrive), review (critique gives a scored UX review, audit a technical report ranked P0 to P3), finish (polish, harden, clarify, adapt, optimize, onboard), live iteration in a running dev server (live, generate), and setup (shape, init, document writes DESIGN.md, extract).
  • Detector: 62 rules, no LLM or API key, run as an agent hook, a CLI (npx impeccable detect), or a Chrome extension.
  • Agents: Claude Code, Codex CLI, Cursor, GitHub Copilot, Gemini CLI, OpenCode, Antigravity, Kiro, and about a dozen more.
  • Good for: giving UI feedback in precise terms and getting a repeatable design review before shipping a front end.

Why it matters

A shared vocabulary of design operations makes front-end work with agents less trial-and-error, and the rule-based detector gives a check that does not depend on a model's taste.