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By agent · Codex

Codex skills: 1008 worth installing

Skills in the open SKILL.md format that Codex reads. Each one has a plain-language summary and the command to install it.

Installing a skill in Codex

$ npx skills add <author>/<skill> --agent codex

Replace the placeholder with the author and skill name from the skill's page. Start a new Codex session afterwards so the skill is picked up.

Skills for Codex

All skills

Ad Creative

Corey HainesAudit warning

Generates and iterates ad creative at scale: headlines, descriptions, primary text and full ad variations for any paid platform.

Marketing and SEOGitHub stars: 52.1kInstalls: 120k

Paid Ads

Corey Haines

Plans and optimises paid campaigns on Google Ads, Meta, LinkedIn, X and other ad platforms, including targeting and budget.

Marketing and SEOGitHub stars: 52.1kInstalls: 69.3k

AI SEO

Corey Haines

Optimises content to be cited by LLMs and to appear in AI-generated answers, covering AEO, GEO and LLMO.

Marketing and SEOGitHub stars: 52.1kInstalls: 134k

Analytics Tracking

Corey Haines

Sets up, improves and audits analytics tracking: GA4, conversion and event tracking, UTM parameters and tag management.

Marketing and SEOGitHub stars: 52.1kInstalls: 70.9k

ASO

Corey Haines

Audits and optimises an App Store or Google Play listing to improve app visibility and ranking.

Marketing and SEOGitHub stars: 52.1kInstalls: 64.2k

Attribution

Corey Haines

Works out which marketing drives conversions and revenue, helps choose an attribution model and reconciles conflicting numbers across tools.

Marketing and SEOGitHub stars: 52.1kInstalls: 27.2k

Churn Prevention

Corey Haines

Reduces churn with cancellation flows, save offers, failed-payment recovery and retention strategies.

Marketing and SEOGitHub stars: 52.1kInstalls: 110k

Co-Marketing

Corey Haines

Finds co-marketing partners, plans joint campaigns and generates partnership ideas.

Marketing and SEOGitHub stars: 52.1kInstalls: 69.3k

Cold Email

Corey Haines

Writes B2B cold emails and follow-up sequences aimed at getting replies.

Marketing and SEOGitHub stars: 52.1kInstalls: 115k

Builds a community strategy for growing and running a Discord, Slack, forum or subreddit around a product.

Marketing and SEOGitHub stars: 52.1kInstalls: 78.7k

Researches and profiles competitors starting from their URLs.

Marketing and SEOGitHub stars: 52.1kInstalls: 81.8k

Creates competitor comparison and alternatives pages for SEO and sales enablement.

Marketing and SEOGitHub stars: 52.1kInstalls: 67.2k

Content Strategy

Corey Haines

Plans a content strategy: what to create, which topics to cover and how to prioritise them.

Marketing and SEOGitHub stars: 52.1kInstalls: 149k

Copy Editing

Corey Haines

Edits, reviews and improves existing marketing copy, and refreshes outdated content.

WritingGitHub stars: 52.1kInstalls: 134k

Copywriting

Corey Haines

Writes and rewrites marketing copy for homepages, landing pages, pricing pages, feature pages and product pages.

WritingGitHub stars: 52.1kInstalls: 213k

Page CRO

Corey Haines

Improves conversions on marketing pages and forms: homepages, landing pages, pricing pages and lead capture forms.

Marketing and SEOGitHub stars: 52.1kInstalls: 75.3k

Customer Research

Corey Haines

Conducts and synthesises customer research: interviews, transcripts, surveys and support data.

ResearchGitHub stars: 52.1kInstalls: 102k

Directory Submissions

Corey HainesAudit warning

Submits a product to startup, SaaS, AI and review directories for backlinks, domain rating and discovery.

Marketing and SEOGitHub stars: 52.1kInstalls: 74.5k

Email Sequence

Corey Haines

Creates and optimises email sequences: drip campaigns, nurture flows, onboarding emails and lifecycle programmes.

Marketing and SEOGitHub stars: 52.1kInstalls: 66.1k

Events

Corey Haines

Plans and runs event marketing: webinars, conferences, trade shows, meetups and workshops, including sponsorship and speaking.

Marketing and SEOGitHub stars: 52.1kInstalls: 13.1k

Free Tool Strategy

Corey Haines

Plans and evaluates free tools built for marketing, such as calculators and generators, for lead generation and SEO value.

Marketing and SEOGitHub stars: 52.1kInstalls: 62.9k

Marketing Image

Corey Haines

Creates and edits marketing images: blog heroes, social graphics, product mockups, banners and brand assets.

DesignGitHub stars: 52.1kInstalls: 75.9k

Runs influencer and creator partnerships: finding and vetting partners, structuring deals, briefing creators and measuring ROI.

Marketing and SEOGitHub stars: 52.1kInstalls: 27.4k

Launch Strategy

Corey Haines

Plans a product launch, feature announcement or release, including Product Hunt, beta and early-access launches.

Marketing and SEOGitHub stars: 52.1kInstalls: 66.1k

Questions

Codex and skills.

Do Claude skills work in Codex?

Often. A skill is a folder of instructions and scripts in the open SKILL.md format, which Codex reads. A skill that depends on tools only one agent provides will not carry over, so read the skill's source before you rely on it.

How do I install a skill in Codex?

Each skill page has an install command. Run it in a terminal, then start a new Codex session so the skill is picked up.

What is the difference between a skill and an instructions file such as AGENTS.md?

An instructions file is loaded in every session and describes the project. A skill is loaded only when a task calls for it, so it can be long and specific without costing context on every turn.

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