ab-testing agent skill by coreyhaines31

At a glance

Before you install

Read from the skill's files at the directory's October 22, 2026 snapshot: what ships with it, what its code reads, and the terms it is published under.

• Bundled scripts: none.
• License: MIT, an open-source or open-content license.

Install ab-testing

The skills CLI works with Claude Code, Codex, Cursor and other agents; the other routes copy the folder by hand.

npx skills add https://github.com/coreyhaines31/marketingskills/tree/main/skills/ab-testing

tmp="$(mktemp -d)"
git clone --depth 1 https://github.com/coreyhaines31/marketingskills.git "$tmp/repo"
mkdir -p .claude/skills
cp -R "$tmp/repo/"skills/ab-testing .claude/skills/
rm -rf "$tmp"

tmp="$(mktemp -d)"
git clone --depth 1 https://github.com/coreyhaines31/marketingskills.git "$tmp/repo"
mkdir -p .agents/skills
cp -R "$tmp/repo/"skills/ab-testing .agents/skills/
rm -rf "$tmp"

For a user-level install, copy the folder to ~/.claude/skills/ (Claude Code) or ~/.agents/skills/ (Codex). Inside Codex, $skill-installer can also fetch a skill from GitHub. New to skills? Read How to install agent skills in Claude Code, Codex and Cursor.

coreyhaines31/marketingskills is third-party code. Read SKILL.md and any bundled scripts before you install it.

How the author describes it

When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program. Also use when the user mentions "A/B test," "split test," "experiment," "test this change," "variant copy," "multivariate test," "hypothesis," "should I test this," "which version is better," "test two versions," "statistical significance," "how long should I run this test," "growth experiments," "experiment velocity," "experiment backlog," "ICE score," "experimentation program," or "experiment playbook." Use this whenever someone is comparing two approaches and wants to measure which performs better, or when they want to build a systematic experimentation practice. For tracking implementation, see analytics. For page-level conversion optimization, see cro.

From the description field of SKILL.md. Agents read this line to decide when to load the skill.

Sections in SKILL.md

• Initial Assessment
• Core Principles
• 1. Start with a Hypothesis
• 2. Test One Thing
• 3. Statistical Rigor
• 4. Measure What Matters
• Hypothesis Framework
• Structure
• Example
• Test Types
• Sample Size
• Quick Reference
• Metrics Selection
• Primary Metric
• Secondary Metrics
• Guardrail Metrics

Files in the skill folder

• SKILL.md
• evals/evals.json
• references/sample-size-guide.md
• references/test-templates.md

Suede Skill Check: 88/100 · B

ab-testing passes the required frontmatter check and all seven graded checks, which cover the SKILL.md format, a declared license and a commit in the last year. Those checks earn 56 of the score’s points; the rest come from description quality, instruction depth, bundled files, maintenance and curated-list citations. How the score works.

Where this skill is cited

coreyhaines31/marketingskills appears in 4 curated lists: BehiSecc/awesome-claude-skills, VoltAgent/awesome-agent-skills, heilcheng/awesome-agent-skills, karanb192/awesome-claude-skills.

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