Key takeaways
- Star count leader by a wide margin — 32,921 stars as of June 11, 2026, more than doubling since March, with 5,401 forks and active development
- JavaScript, MIT license. Created January 15, 2026 by Corey Haines. Now 50+ skills across 8 categories, up from the original 5 domains
- No longer Claude Code only — v2.x supports OpenAI Codex, Cursor, Windsurf, and any agent implementing the Agent Skills spec
- SEO/GEO is one capability among many — trades depth for breadth across the full marketing stack; free under MIT, monetized via the creator's paid services (Magister AI CMO, Conversion Factory)
FAQ
What is Marketing Skills?
A skill library for AI coding agents covering the full marketing stack — 50+ skills across 8 categories including conversion optimization, copywriting, SEO, paid distribution, retention, and growth engineering. At 32,921 stars as of June 2026, it is the most popular AI coding agent skill library in the marketing category.
How deep is the SEO/GEO coverage?
SEO & Discovery is one category among eight. It covers core concepts but lacks the depth of dedicated tools like claude-seo (13 sub-skills, MCP integration) or geo-seo-claude (citability scoring, 5 subagents).
Why does it have so many stars?
The broad marketing scope appeals to a much larger audience than SEO-only tools. Every marketing team needs CRO, copywriting, and analytics — SEO specialists are a subset of that market.
Should I use this or a dedicated SEO tool?
Use Marketing Skills if you need one skill library for all marketing tasks and SEO is not your primary concern. Use a dedicated tool like claude-seo or geo-seo-claude if SEO/GEO is your main focus and you need deeper analysis.
Is Marketing Skills free?
Yes — the skills are MIT-licensed and free, installable via npx skills or the Claude Code plugin marketplace. Creator Corey Haines monetizes around the library with paid services including Magister (an autonomous AI CMO agent) and his Conversion Factory agency.
Overview
Marketing Skills is the star count leader in the AI coding agent skills ecosystem — 32,921 stars as of June 11, 2026, more than double its March count and far ahead of every dedicated tool in the SEO/GEO agent skills comparison. The catch: SEO/GEO is one capability among eight marketing categories. This is a generalist tool, not a specialist one.
Created by Corey Haines (Swipe Files, Conversion Factory), the project has grown from five domains into a v2.x library of 50+ skills across 8 categories, with support beyond Claude Code for OpenAI Codex, Cursor, Windsurf, and any agent implementing the Agent Skills spec. Development is active — the last push was June 10, 2026.
Key stats: 32,921 stars, 5,401 forks, MIT license, JavaScript. Created January 15, 2026; last pushed June 10, 2026.
| Attribute | Value |
|---|---|
| Stars | 32,921 (June 11, 2026) |
| Forks | 5,401 |
| License | MIT |
| Language | JavaScript |
| Created | January 15, 2026 |
| Skills | 50+ across 8 categories |
| Agent Support | Claude Code, OpenAI Codex, Cursor, Windsurf, Agent Skills spec |
| Website | marketing-skills.com |
| Category | SEO/GEO Agent Skills |
How It Works
Marketing Skills installs as an agent skill library — via the npx skills CLI, the Claude Code plugin marketplace, direct clone, git submodule, or SkillKit for multi-agent deployment. Each skill packages frameworks, quality rules, and templates the agent invokes during marketing tasks.
Eight Categories (v2.x)
The v2.0 restructuring consolidated overlapping skills and reorganized the library from five domains into eight categories:
| Category | Coverage |
|---|---|
| Conversion Optimization | A/B testing, funnel analysis, landing page optimization |
| Content & Copy | Headlines, email copy, ad copy, product descriptions, brand voice |
| SEO & Discovery | Keyword research, on-page optimization, technical SEO, GEO basics |
| Paid & Distribution | Ad campaigns, channel strategy, distribution |
| Measurement & Testing | Tracking setup, attribution, dashboards, reporting |
| Retention | Lifecycle, churn reduction, email retention |
| Growth Engineering | Growth loops, viral mechanics, referral systems |
| Strategy & Monetization | Positioning, pricing, marketing planning |
The v2.3.0 release added a marketing-plan skill that generates AARRR-structured growth plans.
The Breadth Play
Marketing Skills succeeds because it solves a real problem: marketing teams need a dozen different capabilities, and installing a separate skill for each one is impractical. A single library covering the full stack means one install, one library to maintain, one context for the agent to work within.
The 32,921 stars reflect this — the addressable market for "marketing skills" is much larger than "SEO skills." Every marketing team needs some SEO knowledge; not every team needs a 13-sub-skill SEO audit engine.
Pricing
The library is free under MIT. Corey Haines monetizes around it: Magister, an autonomous "AI CMO" agent, plus his Conversion Factory agency and Swipe Files newsletter are promoted as the done-for-you tier.
SEO/GEO Coverage
Within the broader library, the SEO & Discovery category covers:
| Feature | Depth |
|---|---|
| Keyword Research | Core coverage |
| On-Page SEO | Core coverage |
| Technical SEO | Basic coverage |
| Content Strategy | Core coverage |
| GEO | Basic awareness |
| Schema Markup | Basic coverage |
| Citability Scoring | Not covered |
| AI Crawler Analysis | Not covered |
| MCP Integration | Not available |
The SEO coverage is competent for general marketing work but lacks the depth of dedicated tools. No citability scoring, no AI crawler analysis, no MCP integration for real search data, no parallel subagent architecture. For teams where SEO is the primary concern, a dedicated tool will outperform.
Competitive Position
Marketing Skills dominates on adoption metrics but competes in a different lane than pure SEO/GEO tools. In the SEO/GEO agent skills category, it is the broadest but shallowest option on SEO specifically.
The competitive dynamic is generalist vs. specialist:
- Marketing Skills — one library for all marketing tasks, adequate SEO
- claude-seo — deep SEO with 13 sub-skills and MCP data integration
- geo-seo-claude — deep GEO with citability scoring and AI search focus
The multi-agent expansion widens the moat: where most category rivals remain Claude Code only, Marketing Skills now ships to Codex, Cursor, and Windsurf users too. For most marketing teams, Marketing Skills is the pragmatic choice. For teams with dedicated SEO functions, a specialist tool is worth the additional setup.
Strengths
- Broadest coverage — 50+ skills across 8 categories, from CRO to monetization strategy
- Massive adoption — 32,921 stars and 5,401 forks, the largest community in the category
- Multi-agent — Claude Code, OpenAI Codex, Cursor, Windsurf, and any Agent Skills spec agent
- Actively maintained — v2.x restructuring and ongoing releases through June 2026
- Single install — one library replaces multiple specialist skills
- MIT license — unrestricted use
Weaknesses
- Shallow SEO/GEO — basic coverage vs. deep specialist tools
- No citability scoring — misses the GEO-specific analysis tools provide
- No MCP integration — can't connect to real search data
- Jack of all trades — depth sacrificed for breadth in every domain
- Commercial funnel — the repo doubles as top-of-funnel for the creator's paid services
What Developers Say
Despite the largest star count in the category, attributable developer commentary is thin. A January 2026 Hacker News submission of the repo drew no substantive discussion, and searches of HN and Reddit through June 2026 surfaced imitators and similar libraries rather than verbatim user testimonials. No attributed quotes met the sourcing bar for this profile; the 32,921 stars and 5,401 forks remain the strongest available adoption signal.
Bottom Line
Recommended for marketing teams that want one agent skill library for everything — CRO, copywriting, SEO, paid, retention, and growth. As of June 2026 it is the clear category leader: 32,921 stars, active v2.x development, and multi-agent support across Claude Code, Codex, Cursor, and Windsurf. For teams where SEO or GEO is the primary concern, pair it with a specialist tool (claude-seo for SEO depth, geo-seo-claude for GEO depth) rather than relying on its basic SEO & Discovery coverage.
Outlook: the trajectory — doubling stars in three months, a v2.0 restructuring, and a commercial layer (Magister) forming around the free core — suggests Marketing Skills is consolidating the generalist lane. The open question is whether the MIT library stays the focus or becomes a funnel for the paid AI CMO product.