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The copywriting skill

Copywriting is part of Corey Haines' marketing skills. Its job is to write or rewrite marketing page copy: headlines, value propositions and calls to action. It loads on its own when a request matches its description, and you can also call it by name.

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When the agent reaches for it

The agent keeps every installed skill's description in view and loads the full instructions when a request matches. This is the description it reads:

When the user wants to write, rewrite, or improve marketing copy for any page — including homepage, landing pages, pricing pages, feature pages, about pages, or product pages. Also use when the user says "write copy for," "improve this copy," "rewrite this page," "marketing copy," "headline help," "CTA copy," "value proposition," "tagline," "subheadline," "hero section copy," "above the fold," "this copy is weak," "make this more compelling," or "help me describe my product." Use this whenever someone is working on website text that needs to persuade or convert. For email copy, see emails. For popup copy, see popups. For editing existing copy, see copy-editing. For the offer underneath the copy (bonuses, guarantees, value framing), see offers.

What the instructions cover

The sections of its SKILL.md, in order.

  • Before Writing
  • Copywriting Principles
  • Writing Style Rules
  • Best Practices
  • Page Structure Framework
  • CTA Copy Guidelines
  • Page-Specific Guidance
  • Voice and Tone
  • Output Format
  • Related Skills

What ships with it

Besides SKILL.md, the folder carries these. The agent opens them only when a step in the instructions calls for one.

  • evals/ 1 file · 10 KB
  • references/ 2 files · 20 KB

Install the copywriting skill

For Claude Code, run this in a terminal. It comes from the publisher's own instructions.

terminal 
npx skills add coreyhaines31/marketingskills --skill copywriting -a claude-code

License: MIT.

In Longwave, add Marketing Skills from the marketplace. It installs all 50 of its skills, and your Claude Code, Codex and OpenCode threads can use them.

Questions people ask

How do I install the copywriting skill?

For Claude Code, run npx skills add coreyhaines31/marketingskills --skill copywriting -a claude-code in a terminal. In Longwave, add Marketing Skills from the marketplace, and its skills reach your Claude Code, Codex and OpenCode threads.

When does the agent use the copywriting skill?

When a request matches its description. The agent keeps only the name and description of each installed skill in view, and reads the full instructions when a task fits. You can also ask for it by name.

Use your skills in every harness.

Longwave installs a skill collection once, and your Claude Code, Codex and OpenCode threads can all use it.

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