launchdarkly-ui-skills

Launchdarkly 的 UI 设计系统。在构建受 Launchdarkly 美学启发的界面时使用——深色模式、Inter 字体、4px 网格。

SKILL.md

--- frontmatter

name: launchdarkly-ui-skills
description: Launchdarkly's UI design system. Use when building interfaces inspired by Launchdarkly's aesthetic - dark mode, Inter font, 4px grid.
license: MIT
metadata:
  author: design-skills
  version: "1.0.0"
  source: https://launchdarkly.com

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