Agent Skills Hub

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What are agent skills?

Agent skills package instructions, scripts, and reference material into a single folder (SKILL.md) so an AI agent can perform a specific task better. Claude, ChatGPT/Codex, Cursor, Gemini CLI, and GitHub Copilot all support the same format.

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We collect skills from across the web and show which agents they work with and how to install them. Each skill belongs to its original author, and we always link to the source.

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Category: Marketing

A/B Test Setup

Designs statistically valid A/B tests, from hypothesis and sample size to run time and result interpretation.

What it does

  • Clarifies the goal, baseline conversion, traffic, and constraints
  • Writes a hypothesis with a specific prediction
  • Calculates sample size and run time
  • Guides how to run a growth experimentation program

When to use it

Use it before changing landing page copy or pricing pages to properly test which version wins.

How to install

  1. Run the command below in your terminal. Pick the agents you use (Claude Code, Codex, Cursor, Gemini CLI, Copilot, and more) and it installs into the right folder.
npx skills add https://github.com/coreyhaines31/marketingskills --skill ab-testing
  1. To install manually, download the ab-testing skill folder from the GitHub repository and copy it into your agent's skills folder, such as ~/.claude/skills/ or .cursor/skills/.
  2. Ask your agent for a related task and the skill is used automatically.
View source ↗

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