Your AI Agent's New CMO Is a Collection of Markdown Files
It packages marketing playbooks into markdown skills that turn AI coding agents into growth collaborators for founders and technical marketers.
Corey Haines’s marketingskills repo turns decades of marketing expertise into structured agent context, betting that domain-specific knowledge will separate useful AI agents from automated slop.

What it does
This repo is a library of dozens of markdown skills that teach AI agents specialized marketing workflows. Each file covers a discipline—like CRO, cold email, programmatic SEO, or churn prevention—and includes frameworks, best practices, and cross-references to related skills. Drop them into Claude Code, Cursor, or any Agent Skills-compatible tool, and the agent recognizes the task and switches into the appropriate marketing mode.
The interesting bit
The skills aren’t isolated prompts; they’re a dependency graph. Every skill starts by reading the product-marketing foundation to understand your positioning, then cross-references siblings—so copywriting talks to CRO, and SEO audits feed schema markup. It’s basically a context architecture pretending to be a repo.
Key highlights
- Covers the full funnel: acquisition (SEO, ads, cold email), activation (onboarding, signup), retention (churn prevention, referrals), and revenue (pricing, revops, paywalls).
- Skills reference each other; the
product-marketingskill is the root node that all others consume first. - Works with Claude Code, OpenAI Codex, Cursor, Windsurf, and anything else implementing the Agent Skills spec.
- Includes emerging disciplines like AI-SEO (optimizing for LLM citations) and programmatic SEO.
- 35,993 stars and open for contributions.
Caveats
- The README is upfront that this is a collection of markdown knowledge, not executable code—your agent still does the actual work.
- Quality depends on how well your specific AI agent implements the Agent Skills spec; results may vary across Claude, Cursor, and Codex.
- Some skill descriptions in the README are truncated, so you’ll need to open individual folders to see the full prompt content.
Verdict
Grab this if you’re a founder or technical marketer who wants AI agents to handle growth work with consistent, cross-referenced context. Skip it if you’re looking for a marketing automation tool that runs independently—this is a brain transplant, not a robot.
Frequently asked
- What is coreyhaines31/marketingskills?
- It packages marketing playbooks into markdown skills that turn AI coding agents into growth collaborators for founders and technical marketers.
- Is marketingskills open source?
- Yes — coreyhaines31/marketingskills is open source, released under the MIT license.
- What language is marketingskills written in?
- coreyhaines31/marketingskills is primarily written in JavaScript.
- How popular is marketingskills?
- coreyhaines31/marketingskills has 41.2k stars on GitHub and is currently cooling off.
- Where can I find marketingskills?
- coreyhaines31/marketingskills is on GitHub at https://github.com/coreyhaines31/marketingskills.