# Hallmark

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

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.

Website: https://github.com/Nutlope/hallmark

## What it is 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](https://xiry.app/topics/development.md)
- Topic: [AI Coding Tools](https://xiry.app/topics/development/ai-coding-tools.md)
- 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](https://x.com/nutlope/status/2062226108154618268): The saved thing: a real tool to install and use.

## Compare

- [Alternatives to shadcn/ui](https://xiry.app/alternatives/shadcn-ui.md)
- [Alternatives to v0](https://xiry.app/alternatives/v0.md)

## Related

- [Inspo](https://xiry.app/resources/inspo): Design inspiration MCP server and archive for AI coding agents. (Web app, Free)
- [agent-skills](https://xiry.app/resources/agent-skills): Curated skills and performance rules for AI coding agents by Vercel. (GitHub repo, Open source)
- [AI App Builders & Coding Assistants Roster](https://xiry.app/resources/ai-app-builders-and-coding-assistants-roster): Curated roster of 20 AI app builders and coding assistants. (List)
- [animation-reverse-engineering](https://xiry.app/resources/animation-reverse-engineering): Claude Code skill to turn animation videos into production Framer Motion code. (GitHub repo, Free)
- [MCP in Cursor Guide](https://xiry.app/resources/mcp-in-cursor-guide): Walkthrough for setting up Model Context Protocol servers inside Cursor (Framework, Free)
- [One](https://xiry.app/resources/one): Unified Mac HUD to triage and control multiple coding agents (Web app, Freemium)

Updated 10 October 2026. Page: https://xiry.app/resources/hallmark

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