Files
antigravity-skills-reference/skills/baseline-ui/SKILL.md
Al-Garadi ef285b5c97 fix: sync upstream main with Windows validation and skill guidance cleanup (#457)
* fix: stabilize validation and tests on Windows

* test: add Windows smoke coverage for skill activation

* refactor: make setup_web script CommonJS

* fix: repair aegisops-ai frontmatter

* docs: add when-to-use guidance to core skills

* docs: add when-to-use guidance to Apify skills

* docs: add when-to-use guidance to Google and Expo skills

* docs: add when-to-use guidance to Makepad skills

* docs: add when-to-use guidance to git workflow skills

* docs: add when-to-use guidance to fp-ts skills

* docs: add when-to-use guidance to Three.js skills

* docs: add when-to-use guidance to n8n skills

* docs: add when-to-use guidance to health analysis skills

* docs: add when-to-use guidance to writing and review skills

* meta: sync generated catalog metadata

* docs: add when-to-use guidance to Robius skills

* docs: add when-to-use guidance to review and workflow skills

* docs: add when-to-use guidance to science and data skills

* docs: add when-to-use guidance to tooling and automation skills

* docs: add when-to-use guidance to remaining skills

* fix: gate bundle helper execution in Windows activation

* chore: drop generated artifacts from contributor PR

* docs(maintenance): Record PR 457 sweep

Document the open issue triage, PR supersedence decision, local verification, and source-only cleanup that prepared PR #457 for re-running CI.

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Co-authored-by: sickn33 <sickn33@users.noreply.github.com>
2026-04-05 21:04:39 +02:00

3.8 KiB
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name, description, risk, source
name description risk source
baseline-ui Validates animation durations, enforces typography scale, checks component accessibility, and prevents layout anti-patterns in Tailwind CSS projects. Use when building UI components, reviewing CSS utilities, styling React views, or enforcing design consistency. unknown community

Baseline UI

Enforces an opinionated UI baseline to prevent AI-generated interface slop.

When to Use

  • You are building or reviewing Tailwind-based UI and want a strict baseline for accessibility, motion, typography, and layout.
  • The task is to prevent generic or sloppy AI-generated interface decisions before they spread through the codebase.
  • You need concrete UI constraints to apply to a file review or an ongoing frontend implementation.

How to use

  • /baseline-ui Apply these constraints to any UI work in this conversation.

  • /baseline-ui <file> Review the file against all constraints below and output:

    • violations (quote the exact line/snippet)
    • why it matters (1 short sentence)
    • a concrete fix (code-level suggestion)

Stack

  • MUST use Tailwind CSS defaults unless custom values already exist or are explicitly requested
  • MUST use motion/react (formerly framer-motion) when JavaScript animation is required
  • SHOULD use tw-animate-css for entrance and micro-animations in Tailwind CSS
  • MUST use cn utility (clsx + tailwind-merge) for class logic

Components

  • MUST use accessible component primitives for anything with keyboard or focus behavior (Base UI, React Aria, Radix)
  • MUST use the projects existing component primitives first
  • NEVER mix primitive systems within the same interaction surface
  • SHOULD prefer Base UI for new primitives if compatible with the stack
  • MUST add an aria-label to icon-only buttons
  • NEVER rebuild keyboard or focus behavior by hand unless explicitly requested

Interaction

  • MUST use an AlertDialog for destructive or irreversible actions
  • SHOULD use structural skeletons for loading states
  • NEVER use h-screen, use h-dvh
  • MUST respect safe-area-inset for fixed elements
  • MUST show errors next to where the action happens
  • NEVER block paste in input or textarea elements

Animation

  • NEVER add animation unless it is explicitly requested
  • MUST animate only compositor props (transform, opacity)
  • NEVER animate layout properties (width, height, top, left, margin, padding)
  • SHOULD avoid animating paint properties (background, color) except for small, local UI (text, icons)
  • SHOULD use ease-out on entrance
  • NEVER exceed 200ms for interaction feedback
  • MUST pause looping animations when off-screen
  • SHOULD respect prefers-reduced-motion
  • NEVER introduce custom easing curves unless explicitly requested
  • SHOULD avoid animating large images or full-screen surfaces

Typography

  • MUST use text-balance for headings and text-pretty for body/paragraphs
  • MUST use tabular-nums for data
  • SHOULD use truncate or line-clamp for dense UI
  • NEVER modify letter-spacing (tracking-*) unless explicitly requested

Layout

  • MUST use a fixed z-index scale (no arbitrary z-*)
  • SHOULD use size-* for square elements instead of w-* + h-*

Performance

  • NEVER animate large blur() or backdrop-filter surfaces
  • NEVER apply will-change outside an active animation
  • NEVER use useEffect for anything that can be expressed as render logic

Design

  • NEVER use gradients unless explicitly requested
  • NEVER use purple or multicolor gradients
  • NEVER use glow effects as primary affordances
  • SHOULD use Tailwind CSS default shadow scale unless explicitly requested
  • MUST give empty states one clear next action
  • SHOULD limit accent color usage to one per view
  • SHOULD use existing theme or Tailwind CSS color tokens before introducing new ones