Guide · Agent skill
How to use the Copywriting Assistant agent skill
Updated · written with AI from the project's own documentation and checked against our catalogue data
The Copywriting Assistant is an agent skill for the copywriting skill in the coreyhaines31/marketingskills repository, released under the MIT licence. Once installed, your AI agent follows a structured process for homepages, landing pages, pricing pages, feature pages, about pages and product pages. This guide explains what the skill changes, how to install it, how to trigger it and how to use it safely.
Copywriting Assistantcoreyhaines31/marketingskills · MIT Download the skill Quick start
- 1Download the ZIP. Get the skill ZIP from our page and unzip it.
- 2Place the folder. Move the unzipped skill folder into ~/.claude/skills/ for personal use, or into a project's .claude/skills/ folder.
- 3Or upload in the Claude apps. Open Settings → Capabilities → Skills and upload the skill.
- 4Describe the page. Name the page type, audience, offer and the one action you want visitors to take.
- 5Add real proof. Share only verifiable numbers, testimonials and case studies; skip anything you cannot back up.
- 6Review the draft. Check each claim and each [NEED: ...] placeholder before publishing.
What is an agent skill, and what does this one make the agent do?
An agent skill is a folder of instructions and reference files that an AI agent loads when a task matches the skill's description. This skill's main file is SKILL.md, and it is backed by reference files for AI writing habits, copy frameworks and transitions.
When it applies, the agent first works out which situation you are in: a blank brief, a draft with a real voice, or a small point edit. It then changes only what that situation calls for. It checks each line for specificity and provability, avoids common AI writing habits, and will not invent stats or customer results. Where a fact is missing, it flags the gap with a placeholder such as [NEED: ...] instead of guessing.
- Diagnoses the input before writing and states the diagnosis in one line
- Runs each line through a three-question check: can the reader picture it, can it be proven true or false, could a competitor write it
- Declines unsupported claims and names the evidence that would unlock them
- Routes email copy, popup copy, copy editing and offer design to other skills
How do you install the Copywriting Assistant skill?
Download the ZIP for this skill from our page and unzip it. For a personal install, place the unzipped skill folder in ~/.claude/skills/. For a single project, place it in that project's .claude/skills/ folder.
In the Claude apps, you can instead upload the skill under Settings → Capabilities → Skills.
- Personal: ~/.claude/skills/ (available across your projects)
- Project only: .claude/skills/ inside the project folder
- Claude apps: Settings → Capabilities → Skills, then upload
How do you trigger the skill with natural requests?
You do not need a special command. The skill activates when your request matches its description. Plain requests work well, such as asking the agent to write copy for a page, improve copy you already have, rewrite a page, or help with a headline, CTA, value proposition, tagline or hero section.
Say what the page is, who it is for and what you want the visitor to do. The skill asks for anything it still needs, such as traffic source, proof points and objections.
- "Write copy for my pricing page. We sell invoicing software to freelancers."
- "This copy is weak. Improve the hero section of my landing page."
- "Rewrite this page; it sounds like AI."
- "Help me describe my product. Here is my current draft."
- "Give me three headline options for my feature page."
What does a good session look like?
Give the agent your draft or brief, the one primary action you want visitors to take, and any proof you have. If you have a writing sample, include it: the skill matches its sentence length, punctuation and word choices when it has one.
The skill uses the product marketing context file if one exists at .agents/product-marketing.md, .claude/product-marketing.md or the legacy product-marketing-context.md, and checks its Learnings section before proposing ideas.
- Provide the page type, audience, offer, and the single action you want
- Provide proof points only if they are real (numbers, testimonials, case studies)
- Provide a writing sample if you want your voice kept
- Expect [NEED: ...] placeholders where facts are missing
What does the skill need, and what should you check?
The skill lists no required tools or dependencies. It does not run scripts and does not use the network. It is made of instruction and reference files only.
Copy it writes is still your responsibility. The skill does not check legal, medical or financial compliance, and the agent can still get facts wrong from the brief it is given. A human should review every claim before publishing.
- Requires: nothing listed
- Runs scripts: no
- Uses network: no
- Review all numbers, testimonials and guarantees yourself before publishing
Tips for getting better copy
The most useful input is evidence. Real customer language from reviews, interviews or support tickets lets the skill mirror how your buyers talk. Without proof, expect the skill to avoid numbers and to leave placeholders.
When a claim is declined, treat the note as an action item. It tells you what evidence would unlock the claim, such as a customer-review export, a written guarantee policy, a certification or a citable study.
- Ask for point edits when you only need one headline or paragraph; the skill changes only that
- Keep your own vocabulary; the skill is designed to preserve it in drafts you wrote
- Use the leave-it-alone check: ask why each change is better, not just different
What people use it for
- Writing a first homepage or landing page from a one-line product description
- Tightening a pricing page whose copy reads as generic
- Rewriting a product page so it sounds like a person who uses the product
- Drafting hero section and CTA options to test
- Finding the missing evidence behind claims a page cannot yet make
Frequently asked questions
Is the Copywriting Assistant skill free?
The skill is released under the MIT licence, as stated on this page. Check the repository licence for the terms that apply to your use.
What do I need to install it?
The source lists no required dependencies. You download the ZIP, unzip it and place the folder in ~/.claude/skills/ or a project's .claude/skills/ folder, or upload it under Settings → Capabilities → Skills in the Claude apps.
Does the skill run scripts or access the internet?
No. The skill runs no scripts and uses no network access. It consists of instruction and reference files.
Where should I install it if I only need it for one project?
Place the skill folder in that project's .claude/skills/ directory. For use across all your projects, use ~/.claude/skills/ instead.
Does it write email or popup copy?
No. For email copy the skill points you to the emails skill, for popup copy to the popups skill, and for editing existing copy to copy-editing. Offers such as bonuses and guarantees go to the offers skill.
Will it make up statistics or testimonials?
No. The skill refuses to invent stats or customer results and flags missing facts with placeholders. It also names the evidence that would support a declined claim.
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Our verdict
Use this skill if you are writing or tightening a landing page or product page, or your copy sounds generic and you want claims kept honest and tied to real evidence. Pick something else for legal, medical or financial promotional copy that needs regulatory review, or for fully automated publishing with no human checking the claims.
Download the skill