What it is — An open (MIT) design skill for Claude Code, Cursor, and Codex that generates interfaces deliberately built to avoid the generic "AI-slop" look.

Key points

• Picks a page macrostructure and one of twenty themes, then runs 57 anti-pattern "slop-test" gates before output, plus a self-critique pass.
• Covers four modes: build a new UI, audit existing code, redesign a layout, or study a design reference.
• Installs with npx skills add nutlope/hallmark or by copying files directly into a Claude Code, Cursor, or Codex project.