Oil UI is an open-source interface design skill for AI coding agents (MIT, v0.22.0). It pulls genuinely different design directions apart into checkable direction cards, lets a human pick one, refines it against real screenshots, then hands the result to an independent reviewer who never saw it being made. Ships a style comparison-page generator and shoot.mjs, a screenshot-evidence tool; install with npx skills add oil-oil/oil-ui.
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