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…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
<!--
COMMUNITY SKILL — included under its original MIT license.
Source: https://github.com/coreyhaines31/marketingskills by Corey Haines (MIT).
License text: ../LICENSE-marketingskills.txt
Curated into Growth Marketing OS by Mahmoud Omar (mahmoudomar.com) — this file
is NOT original work by the repo author; see /skills/community/README.md.
-->
# A/B Test Setup
You are an expert in experimentation and A/B testing. Your goal is to help design tests that produce statistically valid, actionable results.
## Initial Assessment
**Check for product marketing context first:**
If `.agents/product-marketing.md` exists (or `.claude/product-marketing.md`, or the legacy `product-marketing-context.md` filename, in older setups), read it before asking questions. Use that context and only ask for information not already covered or specific to this task.
Before designing a test, understand:
1. **Test Context** - What are you trying to improve? What change are you considering?
2. **Current State** - Baseline conversion rate? Current traffic volume?
3. **Constraints** - Technical complexity? Timeline? Tools available?
---
## Core Principles
### 1. Start with a Hypothesis
…
The line at the top of this page pins the label v2.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_boa2cehztgf6gqsi
GET https://markdownregistry.com/api/v1/resolve?ref=growthack88/growth-marketing-os/ab-testing
GET https://markdownregistry.com/api/v1/blob/64c748bf00a72a76166c250f5f699709184ba56fefc22623213e77cebc7eafaa
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
growthack88/growth-marketing-os · skills/benchmark-analyst/SKILL.md · Marketing benchmark triage skill. Use whenever metrics are shared with questions like "is this good?", "is this…
growthack88/growth-marketing-os · skills/cod-operations-analyst/SKILL.md · COD (cash-on-delivery) e-commerce operations skill. Use whenever a COD or MENA/emerging-market store shares order…
growthack88/growth-marketing-os · skills/community/churn-prevention/SKILL.md · When the user wants to reduce churn, build cancellation flows, set up save offers, recover failed payments, or…
growthack88/growth-marketing-os · skills/community/icp-research/SKILL.md · Scrapes case studies, testimonials, and solutions pages from a target website to build structured ICP documentation…
growthack88/growth-marketing-os · skills/community/launch-tier-framework/SKILL.md · Classify product launches into defensible tiers and turn roadmap inputs into a season-of-launch plan that aligns…
growthack88/growth-marketing-os · skills/community/marketing-psychology/SKILL.md · When the user wants to apply psychological principles, mental models, or behavioral science to marketing. Also use when…
growthack88/growth-marketing-os · skills/community/onboarding/SKILL.md · When the user wants to optimize post-signup onboarding, user activation, first-run experience, or time-to-value. Also…
growthack88/growth-marketing-os · skills/community/programmatic-seo/SKILL.md · When the user wants to create SEO-driven pages at scale using templates and data. Also use when the user mentions…
coreyhaines31/marketingskills · skills/ab-testing/SKILL.md · When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program…
sickn33/agentic-awesome-skills · plugins/agentic-awesome-skills-claude/skills/ab-testing/SKILL.md · When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program.
ericrisco/rsc-harness · skills/ab-testing/SKILL.md · Use when designing or analyzing a controlled experiment — falsifiable hypothesis, sample size from an MDE, reading…
cesarjoquin/marketing-skills · skills/ab-testing/SKILL.md · When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program…
francostino/opencode-skills-collection · bundled-skills/ab-testing/SKILL.md · When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program.
wankimmy/bossku-superpowers · skills/ab-testing/SKILL.md · When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program…
