Agent Skills Hub

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What are agent skills?

Agent skills package instructions, scripts, and reference material into a single folder (SKILL.md) so an AI agent can perform a specific task better. Claude, ChatGPT/Codex, Cursor, Gemini CLI, and GitHub Copilot all support the same format.

About this site

We collect skills from across the web and show which agents they work with and how to install them. Each skill belongs to its original author, and we always link to the source.

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Category: Design

Hallmark

A design skill for websites and new pages that look designed, not generated.

What it does

  • Powered by Together AI.*
  • Binds every output in every harness, none of it waivable, even when nothing else is read.
    1. Never transition: all. Never animate width, height, top or left. (10a)
    1. Never one italic word inside a roman heading. (38i)

When to use it

A design skill for websites and new pages that look designed, not generated.

How to install

  1. Run the command below in your terminal. Pick the agents you use (Claude Code, Codex, Cursor, Gemini CLI, Copilot, and more) and it installs into the right folder.
npx skills add https://github.com/Nutlope/hallmark --skill hallmark
  1. To install manually, download the hallmark skill folder from the GitHub repository and copy it into your agent's skills folder, such as ~/.claude/skills/ or .cursor/skills/.
  2. Ask your agent for a related task and the skill is used automatically.
View source ↗

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