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zguiyang bbb2f41591 feat: add new OpenSpec skills for change management and onboarding

- Created `openspec-ff-change` skill for fast-forward artifact creation.
- Introduced `openspec-new-change` skill for structured change creation.
- Developed `openspec-onboard` skill for guided onboarding through OpenSpec workflow.
- Added `openspec-sync-specs` skill for syncing delta specs to main specs.
- Implemented `openspec-verify-change` skill for verifying implementation against change artifacts.
- Updated `.gitignore` to exclude OpenSpec generated files.
- Added `skills-lock.json` to manage skill dependencies.

2026-03-13 13:18:03 +08:00

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name, description

name	description
layout-height	Setting element height with spacing scale, fractions, viewport units, and content-based sizing

Height

Utilities for setting the height of an element.

Usage

Spacing scale

Use h-<number> utilities based on the spacing scale:

<div class="h-24">h-24</div>
<div class="h-48">h-48</div>
<div class="h-64">h-64</div>

Percentage heights

Use h-full or h-<fraction> for percentage-based heights:

<div class="h-full">100%</div>
<div class="h-1/2">50%</div>
<div class="h-3/4">75%</div>
<div class="h-9/10">90%</div>

Viewport units

Use h-screen for full viewport height, or dynamic viewport units:

<div class="h-screen">Full viewport height (100vh)</div>
<div class="h-dvh">Dynamic viewport height</div>
<div class="h-svh">Small viewport height</div>
<div class="h-lvh">Large viewport height</div>

Content-based heights

Use h-auto, h-fit, h-min, h-max for content-based sizing:

<div class="h-auto">Auto height</div>
<div class="h-fit">Fit content</div>
<div class="h-min">Min content</div>
<div class="h-max">Max content</div>

Line height

Use h-lh to match line height:

<div class="h-lh">Matches line height</div>

Size utility

Use size-<number> to set both width and height:

<div class="size-16">16x16</div>
<div class="size-24">24x24</div>
<div class="size-full">100% x 100%</div>

Custom values

Use arbitrary values for custom heights:

<div class="h-[117px]">Custom pixel height</div>
<div class="h-[50vh]">Custom viewport height</div>
<div class="h-[calc(100vh-2rem)]">Custom calculation</div>

Key Points

Spacing scale: h-0 through h-96 (and beyond)
Fractions: h-1/2, h-1/3, h-2/3, h-1/4, h-3/4, h-9/10
Viewport units: h-screen (100vh), h-dvh, h-svh, h-lvh
h-dvh adapts to browser UI (address bar, etc.)
h-svh uses smallest viewport height
h-lvh uses largest viewport height
size-* utilities set both width and height simultaneously
Use h-auto to reset height at specific breakpoints

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