experiment-design SKILL.md skillA
experiment-design from rampstackco/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rampstackco/claude-skills/experiment-design@git:20260810.e5bc675Pins git:20260810.e5bc675 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rampstackco/claude-skills
- Path
skills/experiment-design/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260810.e5bc675, committed Aug 10, 2026
- First version recorded
- May 5, 2026
- Size
- 31,727 bytes
- Repository stars
- 1,013
- License
- MIT
A discipline for designing experiments (A/B tests, multivariate, holdouts) so the results actually answer the question you asked. Hypothesis writing, sample size, duration, segment analysis, running discipline, matching a result to a pre-committed decision rule, and the common failure modes that produce confidently wrong shipping decisions. Use this skill whenever the user is planning a test that has not run yet: framing a hypothesis, sizing the sample, setting duration, choosing guardrails…
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
# Experiment Design A senior product manager's playbook for running experiments that produce trustworthy decisions. The default state of experimentation in most companies is sloppy. PMs run tests against vague hypotheses, look at results too early, ignore guardrails, stratify into noise, and ship features whose lift is mostly measurement error. The cost is real: ship the wrong thing, kill the right thing, learn the wrong lesson, repeat. This skill is the discipline that prevents most of those mistakes. It assumes you have a working experimentation platform (Statsig, PostHog, GrowthBook, Optimizely, Amplitude, Eppo, Kameleoon; the platform does not matter for the principles). It assumes you have product-design and engineering pipelines that can deliver real treatment changes. The hard part is the thinking, and that is what is here. When to use this skill: any time you are about to design or interpret an experiment. Read the relevant section before you start, not after the test is running. --- ## What this skill covers …
Read the whole file at its exact version.
How to install
mdr add rampstackco/claude-skills/experiment-design@sha256:357daa03e27b4d4bThe line at the top of this page pins the label git:20260810.e5bc675, 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_cpg6lzghjlugqd2q)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 5, 2026 and Aug 10, 2026, about one every 24 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260810.e5bc675 latest | 2026-08-10 | e5bc675 | 31,727 B | A | view · diff |
| git:20260810.cd90ddd | 2026-08-10 | cd90ddd | 31,204 B | A | view · diff |
| git:20260507.ac2b078 | 2026-05-07 | ac2b078 | 30,568 B | A | view · diff |
| git:20260506.9b7a15f | 2026-05-06 | 9b7a15f | 30,080 B | A | view · diff |
| git:20260505.c80b896 | 2026-05-05 | c80b896 | 30,159 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 (31727 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
rampstackco/claude-skills · 1,013 stars · license MIT · pushed 2026-10-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_cpg6lzghjlugqd2q GET https://markdownregistry.com/api/v1/resolve?ref=rampstackco/claude-skills/experiment-design GET https://markdownregistry.com/api/v1/blob/357daa03e27b4d4b9f32b7a3c8311885d4792f2d33da089a608773ddce786623
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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