launchdarkly-ui-skills
Launchdarkly's UI design system. Use when building interfaces inspired by Launchdarkly's aesthetic - dark mode, Inter font, 4px grid.
What this skill does
# Launchdarkly UI Skills Opinionated constraints for building Launchdarkly-style interfaces with AI agents. ## When to Apply Reference these guidelines when: - Building dark-mode interfaces - Creating Launchdarkly-inspired design systems - Implementing UIs with Inter font and 4px grid ## Colors - MUST use dark backgrounds (lightness < 20) for primary surfaces - detected lightness: 0 - MUST use `#000000` as page background (`surface-base`) - MUST use `#AAB7F5` for primary actions and focus states (`accent`) - SHOULD reduce color palette (currently 13 colors detected) - MUST maintain text contrast ratio of at least 4.5:1 for accessibility ### Semantic Tokens | Token | HEX | RGB | Usage | |-------|-----|-----|-------| | `surface-base` | #000000 | rgb(0,0,0) | Page background | | `surface-raised` | #131313 | rgb(19,19,19) | Cards, modals, raised surfaces | | `text-primary` | #DFDFDF | rgb(223,223,223) | Headings, body text | | `text-secondary` | #3D69B0 | rgb(61,105,176) | Secondary, muted text | | `text-tertiary` | #C1C1CD | rgb(193,193,205) | Additional text | | `accent` | #AAB7F5 | rgb(170,183,245) | Primary actions, links, focus | ## Typography - MUST use `Inter` as primary font family - SHOULD use single font family for consistency - MUST use `138px` / `700` for primary headings - MUST use `32px` / `700` for body text - SHOULD reduce font weights (currently 6 detected) - MUST use `text-balance` for headings and `text-pretty` for body text - SHOULD use `tabular-nums` for numeric data - NEVER modify letter-spacing unless explicitly requested ### Text Styles | Style | Font | Size | Weight | Color | Count | |-------|------|------|--------|-------|-------| | `heading-1` | Inter | 138px | 700 | #F7F7F7 | 1 | | `heading-2` | Inter | 138px | 700 | #D5D7F0 | 1 | | `body` | Inter | 32px | 700 | #DFDFDF | 1 | | `text-29px` | Inter | 29px | semi_bold | #E0E0E0 | 1 | | `text-25px` | Inter | 25px | 700 | #DFDFDF | 1 | | `text-23px` | Inter | 23px | semi_bold | #D1D1D1 | 1 | | `text-21px` | Inter | 21px | 500 | #C2C2C2 | 1 | | `text-21px` | Inter | 21px | 400 | #5557A0 | 1 | | `text-20px` | Inter | 20px | 400 | #3D69B0 | 1 | | `text-20px` | Inter | 20px | 400 | #C1C1CD | 1 | ### Typography Reference **Font Families:** - `Inter` (used 31x) **Font Sizes:** 9px, 10px, 11px, 12px, 13px, 14px, 15px, 16px, 18px, 19px, 20px, 21px, 23px, 25px, 29px, 32px, 138px ## Spacing - MUST use 4px grid for spacing - SHOULD use spacing from scale: 4px, 5px, 7px, 9px, 12px, 21px, 28px, 69px - SHOULD use 4px as default gap between elements - NEVER use arbitrary spacing values (use design scale) - SHOULD maintain consistent padding within containers ## Borders - NEVER use arbitrary border-radius values (use design scale) - SHOULD use subtle borders (1px) for element separation ## Layout - MUST design for 1920px base viewport width - SHOULD use consistent element widths: 10px, 14px, 25px, 29px - SHOULD maintain text-heavy layout with clear hierarchy - NEVER use `h-screen`, use `h-dvh` for full viewport height - MUST respect `safe-area-inset` for fixed elements - SHOULD use `size-*` for square elements instead of `w-*` + `h-*` ### Detected Layout Patterns - **Main Content**: width: 1920px, height: 949px - **Main Content**: width: 1920px, height: 1031px - **Header**: height: 47px - **Header**: height: 48px ## Components ### Buttons | Variant | Background | Text | Border | Height | Radius | |---------|------------|------|--------|--------|--------| | Ghost | transparent | #3D69B0 | none | - | - | ## Interactive States ### Focus - MUST use `2px` outline with accent color (`#AAB7F5`) - MUST use `2px` outline-offset - NEVER remove focus indicators ### Hover - Buttons (primary): lighten background by 10% - Buttons (secondary): use `#131313` background - List items: use `#131313` background ### Disabled - MUST use `opacity: 0.5` - MUST use `cursor: not-allowed` ## Interaction - MUST use an `AlertDialog` for destructive or irreversible actions - SHOULD use structural skeletons for loading states - MUST show errors next to where the action happens - NEVER block paste in `input` or `textarea` elements - MUST add an `aria-label` to icon-only buttons ## 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 use `ease-out` on entrance animations - NEVER exceed `200ms` for interaction feedback - SHOULD respect `prefers-reduced-motion` ## 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
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