ux-guardrails

Prose design rules are followed probabilistically and dropped under iteration pressure; a deterministic check is not. This skill ships that check — scripts/ux_lint.mjs, a single-file, zero-dependency Node lint — plus the hook wiring that runs it on every UI write and refuses to finish a session with critical violations outstanding.

When to use / when NOT to use

Use to install or run mechanical UX enforcement in a landing-page project: spacing on the grid, arbitrary-value and raw-palette bans, WCAG contrast on design-token pairs, focus-visibility, slop tells (purple gradients, gradient text, glassmorphism, transition: all).

Not for: choosing the palette/type/tokens (visual-design-system), picking the overall look (landing-page-art-direction), a full WCAG 2.2 audit with manual passes (landing-page-accessibility), motion design (scroll-motion), or generic test/format hooks (that's ordinary repo tooling).