Impeccable

Also known as: impeccable design skill, pbakaus/impeccable

An open-source design skill for coding agents that gives them 24 named design commands, covering planning, critique, refinement, and slop detection, so they produce deliberate UI instead of statistically average layouts.

When you ask a coding agent to build a screen, it tends to produce something that looks competent but generic: the same safe type scale, the same neutral spacing, the same hierarchy every other vibe-coded app uses. Impeccable is a skill written by designer Paul Bakaus that you install into agents like Claude Code, Cursor, or Codex. Once installed, it gives the agent a shared vocabulary for design decisions and a quality floor it has to meet before it can ship UI.

The 24 commands cover the full design cycle. Commands like 'shape' and 'init' handle planning and context-setting. 'critique' runs a scored UX review. 'audit' produces a technical quality report. 'polish', 'bolder', 'quieter', and 'distill' handle iterative refinement. 'extract' pulls reusable design tokens into a design system file. There's also a detector that parses your files and flags patterns, like mismatched corner radii or unlisted font sizes, without needing to run the agent.

Impeccable went viral on GitHub in October 2026 as part of a broader builder interest in anti-slop tooling for AI-generated interfaces. It's best understood as the design-side counterpart to unslop, which does the same thing for prose. The two tools address the same underlying problem from different angles: AI outputs that are technically correct but artistically inert.

This definition is AI-generated and refreshed weekly. It may contain inaccuracies. Use your own judgment, especially for production decisions.

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