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Hallmark

Hallmark is an agent skill (a SKILL.md file) from Nutlope/hallmark. Anti-AI-slop design skill for greenfield pages, audits, redesigns, and design extraction from URLs or screenshots. It works with Claude Code, Codex and Cursor and has 29,703 GitHub stars. Install it by copying the skill folder into your agent's skills directory.

github.com/Nutlope/hallmark/skills/hallmark (opens in a new tab)

View on GitHub (opens in a new tab)View on skills.sh (opens in a new tab)

Add this skill

Claude

Claude Code loads skills from ~/.claude/skills/ (all projects) or .claude/skills/ (one project):

git clone --depth 1 https://github.com/Nutlope/hallmark.git
cp -r hallmark/skills/hallmark ~/.claude/skills/hallmark   # personal, or .claude/skills in a project

In the Claude apps, zip the hallmark folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/Nutlope/hallmark.git
cp -r hallmark/skills/hallmark .agents/skills/hallmark   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/Nutlope/hallmark.git
cp -r hallmark/skills/hallmark .cursor/skills/hallmark   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Anti-AI-slop design skill for greenfield pages, audits, redesigns, and design extraction from URLs or screenshots. Use when the user asks to build a new app or landing page, wants to redesign something, invokes Hallmark by name, or uses audit/redesign/study. A design skill for AI coding assistants. Makes the UIs they generate look made, not generated.

When it triggers

  • Use when the user asks to build a new app or landing page, wants to redesign something, invokes Hallmark by name, or uses audit/redesign/study.

Similar skills

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All Design & frontend

FAQ

Hallmark FAQ

Still curious? Email info@appsgit.com.

What is the Hallmark skill?

Hallmark is an agent skill (a SKILL.md file) from Nutlope/hallmark. Anti-AI-slop design skill for greenfield pages, audits, redesigns, and design extraction from URLs or screenshots. It works with Claude Code, Codex and Cursor and has 29,703 GitHub stars. Install it by copying the skill folder into your agent's skills directory. Its SKILL.md lives at github.com/Nutlope/hallmark/skills/hallmark.

How do I install the Hallmark skill?

Copy the hallmark folder (the one containing SKILL.md) into ~/.claude/skills/ for Claude Code, .agents/skills/ for Codex or .cursor/skills/ for Cursor. The agent picks it up automatically when a task matches its description.

Is the Hallmark skill free?

Yes. The repository is open source under the MIT license.

Is Hallmark maintained?

The repository's most recent commit was on Aug 6, 2026. appsgit only lists skills from repositories with a commit in the last six months.