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.
Borrowing it
Nothing to install: this file belongs to coreyhaines31/marketingskills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/coreyhaines31/marketingskills/main/AGENTS.mdgit 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/instructions/coreyhaines31/marketingskills/agents-md)<a href="https://agentmods.dev/instructions/coreyhaines31/marketingskills/agents-md"><img src="https://agentmods.dev/badge/instructions/coreyhaines31/marketingskills/agents-md/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/instructions/coreyhaines31/marketingskills/agents-md"><img src="https://agentmods.dev/badge/instructions/coreyhaines31/marketingskills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.02776 | $0.02776 |
| Opus 5.5 | $0.01110 | $0.01110 |
| Sonnet 5.5 | $0.00555 | $0.00555 |
| Haiku 4.5 | $0.00278 | $0.00278 |
Grade A, and why
marketingskills AGENTS.md 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 10d 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
5 near-identical copies found in the catalogue:
- marketing-agency-in-a-box AGENTS.md — 89% identical, 34 lines differ
- Marketing-Skills AGENTS.md — 86% identical, 46 lines differ
- marketingskills AGENTS.md — 86% identical, 52 lines differ
- hormozi-marketing-ultimate AGENTS.md — 86% identical, 52 lines differ
- Marketing-Skills-by-Corey-Haines AGENTS.md — 86% identical, 52 lines differ
How it starts
The opening of the file, as written. The whole thing — 281 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Guidelines for AI agents working in this repository.
Repository Overview
This repository contains Agent Skills for AI agents following the Agent Skills specification. Skills install to .agents/skills/ (the cross-agent standard). This repo also serves as a Claude Code plugin marketplace via .claude-plugin/marketplace.json.
- Name: Marketing Skills
- GitHub: coreyhaines31/marketingskills
- Creator: Corey Haines
- License: MIT
Repository Structure
marketingskills/
├── .claude-plugin/
│ └── marketplace.json # Claude Code plugin marketplace manifest
├── skills/ # Agent Skills
│ └── skill-name/
│ └── SKILL.md # Required skill file
├── tools/
│ ├── clis/ # Zero-dependency Node.js CLI tools (66 tools)
│ ├── composio/ # Composio integration layer (quick start + toolkit mapping)
│ ├── integrations/ # API integration guides per tool
│ └── REGISTRY.md # Tool index with capabilities
├── CONTRIBUTING.md
├── LICENSE
└── README.md
Build / Lint / Test Commands
Skills are content-only (no build step). Verify manually:
- YAML frontmatter is valid
namefield matches directory name exactlynameis 1-64 chars, lowercase alphanumeric and hyphens onlydescriptionis 1-1024 characters
CLI tools (tools/clis/*.js) are zero-dependency Node.js scripts (Node 18+). Verify with:
node --check tools/clis/<name>.js # Syntax check
node tools/clis/<name>.js # Show usage (no args = help)
node tools/clis/<name>.js <cmd> --dry-run # Preview request without sending
node --test tests/clis/*.test.cjs # Contract tests (mocked fetch, no live calls)
Versioning
Two version layers, with different rules:
Repo release version — .claude-plugin/plugin.json version, .claude-plugin/marketplace.json metadata.version, and the VERSIONS.md changelog headings all share one x.y.z number:
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.
- 10d ago Changed · -2 tokens per session f8f54e8862cc
- 12d ago Changed · +3 tokens per session bc49a5f70003
- 17d ago Changed · +1 lines · +42 tokens per session a60684cf9ba0
- 18d ago Changed · +64 tokens per session 0c913b7c434f
- 23d ago Changed · +1 lines · +23 tokens per session 4646ed9af3ae
- 24d ago Changed · +8 lines · +129 tokens per session 6f3dd37f5e6a
- 1mo ago First seen · 271 lines · 2,517 tokens per session scan A 5588c8146e93
marketingskills AGENTS.md is an instructions file published in the GitHub repository coreyhaines31/marketingskills (56,531 stars, last pushed 4d ago), licensed MIT. It adds 2,776 tokens to every session, about $0.0111 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.