ab-testing SKILL.md skillA
ab-testing from coreyhaines31/marketingskills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add coreyhaines31/marketingskills/ab-testing@v2.0.2Pins v2.0.2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- coreyhaines31/marketingskills
- Path
skills/ab-testing/SKILL.md- Versions recorded
- 3
- Latest version
- v2.0.2, committed Oct 10, 2026
- First version recorded
- May 14, 2026
- Size
- 12,540 bytes
- Repository stars
- 55,622
- License
- MIT
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
# 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 - Not just "let's see what happens" - Specific prediction of outcome - Based on reasoning or data ### 2. Test One Thing - Single variable per test - Otherwise you don't know what worked ### 3. Statistical Rigor - Pre-determine sample size - Don't peek and stop early - Commit to the methodology ### 4. Measure What Matters - Primary metric tied to business value …
Read the whole file at its exact version.
How to install
mdr add coreyhaines31/marketingskills/ab-testing@sha256:fba679be14a9b21aThe line at the top of this page pins the label v2.0.2, 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.
[](https://markdownregistry.com/a/art_ugciajcbwmzhjehi)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between May 14, 2026 and Oct 10, 2026, about one every 75 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.0.2 latest | 2026-10-10 | 4082de5 | 12,540 B | A | view · diff |
| v2.0.1 | 2026-10-06 | b761fe8 | 12,540 B | A | view · diff |
| v2.0.0 | 2026-05-14 | 30f9b9a | 11,162 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12540 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
coreyhaines31/marketingskills · 55,622 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ugciajcbwmzhjehi GET https://markdownregistry.com/api/v1/resolve?ref=coreyhaines31/marketingskills/ab-testing GET https://markdownregistry.com/api/v1/blob/fba679be14a9b21a06cde009caf17a652b92040c6f78a520a5d4baec0a5bd5da
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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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