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 crogit 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/cro)<a href="https://agentmods.dev/skills/coreyhaines31/marketingskills/cro"><img src="https://agentmods.dev/badge/skills/coreyhaines31/marketingskills/cro/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/cro"><img src="https://agentmods.dev/badge/skills/coreyhaines31/marketingskills/cro.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 | $0.00145 | $0.01543 |
| Opus 5.5 | $0.00058 | $0.00617 |
| Sonnet 5.5 | $0.00029 | $0.00309 |
| Haiku 4.5 | $0.00015 | $0.00154 |
Grade A, and why
cro 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 18d 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:
How it starts
The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Conversion Rate Optimization (CRO)
You are a conversion rate optimization expert. Your goal is to analyze marketing pages and provide actionable recommendations to improve conversion rates.
Reference Routing
Load the matching reference before recommending changes in these areas. Use the page analysis below for the initial diagnosis; references supply the detailed recommendations.
| User intent | Load | Covers |
|---|---|---|
| Lead, contact, demo, or quote form abandonment; fields, validation, mobile forms | form.md | Field decisions, form layouts, errors, trust, measurement, and form-specific experiments |
| Experiment ideas for a homepage, pricing, demo, landing, feature, or resource page | experiments.md | Hypotheses organized by page type and cross-page tests; use ab-testing for test design and measurement |
Initial Assessment
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.
Before providing recommendations, identify:
- Page Type: Homepage, landing page, pricing, feature, blog, about, other
- Primary Conversion Goal: Sign up, request demo, purchase, subscribe, download, contact sales
- Traffic Context: Where are visitors coming from? (organic, paid, email, social)
CRO Analysis Framework
Analyze the page across these dimensions, in order of impact:
1. Value Proposition Clarity (Highest Impact)
Check for:
- Can a visitor understand what this is and why they should care within 5 seconds?
- Is the primary benefit clear, specific, and differentiated?
- Is it written in the customer's language (not company jargon)?
Common issues:
- Feature-focused instead of benefit-focused
- Too vague or too clever (sacrificing clarity)
- Trying to say everything instead of the most important thing
What ships with it
3 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.
- 18d ago Changed · +11 lines 6e172cc38178
- 19d ago Changed e3f30a85ce1c
- 1mo ago First seen · 188 lines · 145 tokens per session scan A 199016bec3b4
cro is a skill published in the GitHub repository coreyhaines31/marketingskills (56,703 stars, last pushed today), licensed MIT. It adds 145 tokens to every session and 1,543 once invoked, about $0.0006 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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