Hallmark: Anti-AI-Tell Design Skill for Claude Code, Cursor & Codex

Hallmark is an open-source design skill for AI coding tools like Claude Code, Cursor, and Codex. It selects a suitable macro structure from 20 themes, then runs 57 anti-pattern checks and pre-output self-critique to reject default model distributions. This ensures different requirements yield distinct page styles, not mere color swaps. The skill offers four verbs: default to build new UIs; audit to check existing code for anti-patterns; redesign to discard structure but retain copy, IA, and brand; study to extract design genes from screenshots or URLs. For unmatched requirements, Hallmark can switch to Custom mode, designing from scratch, still passing 57 checks. Developers using Claude Code, Cursor, or Codex can install it via `npx skills add nutlope/hallmark` or manually copy files. It is MIT-licensed, ideal for front-end developers seeking unique, non-AI-looking interfaces.