Base unit: 4px (from .forge.json).
Scale: 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 80, 96, 128
Output as CSS custom properties: --space-1: 4px through --space-32: 128px
Plus Tailwind spacing config and suggested usage per step.
About this skill
/forge-spacing — Regenerate Spacing