marketingskills

What to know before you start

marketingskills is an open-source library of marketing skills for AI coding agents, published by Corey Haines and installable with a single command. The site describes it as a library of 50 marketing Claude skills covering SEO, copywriting, cold email, pricing, CRO, and analytics, and it works across Claude Code, Codex, and Cursor rather than being tied to one agent.

The unit of the library is a markdown file. Each skill teaches an agent how to do one marketing job, carrying the frameworks and checklists a practitioner would otherwise keep in their head. The catalogue shown on the site spans categories including SEO, copy, CRO, ads, lifecycle, growth, strategy, and research, with named skills such as ai-seo, seo-audit, programmatic-seo, schema, site-architecture, content-strategy, and directory-submissions. Discovery is done with the command `npx skills add coreyhaines31/marketingskills`, which resolves the set and installs it into the agent's skills directory.

What separates it from a folder of prompts is the shared context file. One skill, product-marketing, holds the description of your product, your audience, and your positioning, and the other skills read that file before doing anything. In practice this means the copywriting skill and the CRO skill operate against the same understanding of what you sell and to whom, instead of each prompt starting from zero. The site also documents a few composite behaviours: marketing-council simulates a board around a single question, marketing-loops runs on a schedule without re-prompting, and marketing-ideas generates a batch of SaaS ideas.

Maintenance is active. The site's changelog shows versioned releases with per-skill version bumps, and the page for the current release documents changes to individual skills and their reference files. The repository shows a large star count on the site itself, and the project publishes a Discord community. The site also names skill partners, which are vendors whose products appear in the skill content, a detail worth noting if you care about whose tooling the recommendations favour.

The format follows the agent skills convention: a directory of markdown files with front matter, which is why the same library can be resolved by more than one agent. Installation copies the set into the agent's skills directory, where the files remain plain text that can be read, edited, or forked before use. That is the practical advantage over a hosted tool: you can audit exactly which instructions your agent will follow, and delete the ones whose advice you do not want applied.

Facts to check directly: the library is open source, installs through npm, and the site presents it primarily as a Claude Code skills library while also supporting Codex and Cursor. What the listing does not establish is how effective the skills are. There is no published benchmark, no study of outcomes, and the star count on the site is a snapshot rather than a fixed figure. The honest framing is that this is a well-maintained, actively versioned collection of marketing playbooks formatted for agents, and its value depends on whether the frameworks inside match how you actually do marketing. For a technical marketer or founder already running an agent daily, it is a low-cost way to give that agent domain vocabulary; for anyone expecting the skills to produce strategy on their own, the shared product-marketing file is the part you still have to write.