xiry.

Development · GitHub repo

Hallmark

Design skill preventing LLMs from generating generic, AI-looking web interfaces

From the Xiry library · Updated 10 October 2026

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Hallmark is an open-source design skill and rule set for AI coding assistants like Claude Code, Cursor, and Codex. It prevents models from defaulting to generic AI templates by applying macrostructures, 21 distinct themes, and 57 anti-slop test gates to ensure each generated site looks unique and intentional.

What it's for

  • Generate web interfaces with AI that avoid generic styling and clichéd layouts
  • Audit existing frontend code against AI design anti-patterns
  • Redesign an existing website while retaining copy, information architecture, and branding
  • Extract layout structure, typography pairings, and palettes from screenshots or URLs

Features

  • 21 distinct design themes such as Carnival, Lumen, Hum, and Cobalt
  • Custom mode to build made-to-measure layouts and palettes from scratch
  • 57 automated slop-test gates and pre-emit self-critique checks
  • Built-in audit command to produce punch lists of anti-patterns without modifying code
  • Design extraction command to study external sites and export portable design specifications
  • Native compatibility with Claude Code, Cursor, and Codex via agent skill files

Pricing

Open source. Free and open source (MIT license)

Details

Type
GitHub repo
Category
Development
Topic
AI Coding Tools
Open source
Yes
Platforms
Command line
For
Developers and designers using AI coding assistants like Claude Code and Cursor to build web interfaces.
Alternative to
v0, shadcn/ui
Tags
web design, claude code, cursor, llm skills, frontend, html css

Why it was saved

  • @nutlope, 3 June 2026: The saved thing: a real tool to install and use.

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