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launchdarkly-ui-skills

Original：🇺🇸 English

Translated

Launchdarkly's UI design system. Use when building interfaces inspired by Launchdarkly's aesthetic - dark mode, Inter font, 4px grid.

1installs

Sourceihlamury/design-skills

Added on2026-02-07

NPX Install

npx skill4agent add ihlamury/design-skills launchdarkly-ui-skills

Tags

Translated version includes tags in frontmatter

launchdarkly-ui design-system dark-mode typography-guidelines ui-components

SKILL.md Content

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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