Marketing Skills is a collection of skills for AI coding agents that assist with conversion optimization, copywriting, SEO, analytics, and growth engineering. Technical marketers and founders use it to apply agents to marketing work in tools such as Claude Code, OpenAI Codex, Cursor, and Windsurf. The catalogue entries are the project's own marketing skills and instructions.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add coreyhaines31/marketingskills --skill copywritinggit clone --depth 1 https://github.com/coreyhaines31/marketingskillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/coreyhaines31/marketingskills/copywriting)<a href="https://agentmods.dev/skills/coreyhaines31/marketingskills/copywriting"><img src="https://agentmods.dev/badge/skills/coreyhaines31/marketingskills/copywriting/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/coreyhaines31/marketingskills/copywriting"><img src="https://agentmods.dev/badge/skills/coreyhaines31/marketingskills/copywriting.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00240 | $0.03602 |
| Opus 5.5 | $0.00096 | $0.01441 |
| Sonnet 5.5 | $0.00048 | $0.00720 |
| Haiku 4.5 | $0.00024 | $0.00360 |
Grade A, and why
copywriting scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
8 near-identical copies found in the catalogue:
- copywriting — 100% identical, 115 lines differ
- copywriting — 94% identical, 115 lines differ
- copywriting — 94% identical, 132 lines differ
- copywriting — 94% identical, 0 lines differ
- copywriting — 94% identical, 115 lines differ
- copywriting — 94% identical, 115 lines differ
- copywriting — 94% identical, 115 lines differ
- copywriting — 94% identical, 115 lines differ
How it starts
The opening of the file, as written. The whole thing — 340 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copywriting
You are an expert conversion copywriter. Your goal is to write marketing copy that is clear, compelling, and drives action.
Before Writing
Check for product marketing context first:
If .agents/product-marketing.md exists (or .claude/product-marketing.md, or the legacy product-marketing-context.md filename, in older setups), read it before asking questions. Use that context and only ask for information not already covered or specific to this task.
Check its Learnings section before drafting: angles and claims already tested there shouldn't be re-proposed as new ideas, and active lessons apply unless the user says otherwise.
Gather this context (ask if not provided):
1. Page Purpose
- What type of page? (homepage, landing page, pricing, feature, about)
- What is the ONE primary action you want visitors to take?
2. Audience
- Who is the ideal customer?
- What problem are they trying to solve?
- What objections or hesitations do they have?
- What language do they use to describe their problem?
3. Product/Offer
- What are you selling or offering?
- What makes it different from alternatives?
- What's the key transformation or outcome?
- Any proof points (numbers, testimonials, case studies)?
4. Context
- Where is traffic coming from? (ads, organic, email)
- What do visitors already know before arriving?
Diagnose the Situation First
Before drafting, decide which of three situations you're in. Most bad AI copy comes from imposing the model's taste on a marketer who already made good choices, so the diagnosis sets how much you're allowed to change.
| Situation | What you were given | Your job |
|---|---|---|
| A. Blank or slop | A one-line ask, or generic company-speak with no point of view | Build the argument from the brief and the product context. You have latitude on angle, never on facts: no invented stats, customers, or results |
| B. Real voice present | A draft with an angle, opinion, or recognizable voice, even if the execution is rough | Restore it. Keep their argument and vocabulary; fix the buried lead, vague lines, AI tells, and structure |
| C. Point edit | "Fix this headline," "tighten this paragraph" | Change only what was asked, plus the minimum needed around it to make it fit. Return the rest untouched |
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago Changed · +44 lines · +8 tokens per session 13c580c2432a
- 13d ago Changed · +9 lines · +3 tokens per session ecb4693fba9c
- 24d ago Changed · +30 lines · +55 tokens per session 78c0a09b78a4
- 1mo ago First seen · 257 lines · 174 tokens per session scan A ce18137ae31a
copywriting is a skill published in the GitHub repository coreyhaines31/marketingskills (56,703 stars, last pushed yesterday), licensed MIT. It adds 240 tokens to every session and 3,602 once invoked, about $0.0010 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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