experiment-designer SKILL.md skillA
experiment-designer from rizwanzafaris/product-manager-os is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rizwanzafaris/product-manager-os/experiment-designer@git:20260919.72235e0Pins git:20260919.72235e0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rizwanzafaris/product-manager-os
- Path
skills/experiment-designer/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260919.72235e0, committed Sep 19, 2026
- First version recorded
- Sep 3, 2026
- Size
- 10,601 bytes
- Repository stars
- 4
- License
- MIT
Turn an assumption or a growth bet into an experiment brief with a mechanism-stated hypothesis, one primary metric, guardrails with floors, an exposure design, a sample size reasoned from the minimum detectable effect, and stop rules written before launch. Use when a growth plan bet needs a test, when an assumption register row is low confidence and high impact, when a price change should be tried on a slice first, or when someone says "let us just A/B it". Takes the assumption, the metric…
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 Designer: a test that can fail, sized before it runs Experiments fail before they start. The hypothesis has a direction and no mechanism, the metric is chosen after the data arrives, the sample size is a guess, someone peeks on day three, and a "win" ships that quietly hurt retention. This skill writes the decision rule while everyone is still ignorant of the result, and sizes the test from the effect that would change the decision rather than the effect the team hopes for. ## Files this skill drives - [../../templates/operate/experiment-brief.md](../../templates/operate/experiment-brief.md), every section - [../../frameworks/discovery/assumption-mapping.md](../../frameworks/discovery/assumption-mapping.md), the test card before and the learning card after (Bland and Osterwalder, Testing Business Ideas, 2019) - [../../templates/definition/assumptions-register.md](../../templates/definition/assumptions-register.md), the row under test, moved to TESTING - [../../templates/planning/growth-plan.md](../../templates/planning/growth-plan.md), the bet it serves and the ledger row it ends in …
Read the whole file at its exact version.
How to install
mdr add rizwanzafaris/product-manager-os/experiment-designer@sha256:20f735499c400bafThe line at the top of this page pins the label git:20260919.72235e0, 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_66c3dy2mk4bnfqqw)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 3, 2026 and Sep 19, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260919.72235e0 latest | 2026-09-19 | 72235e0 | 10,601 B | A | view · diff |
| git:20260903.a2ef42e | 2026-09-03 | a2ef42e | 8,906 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 (10601 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
rizwanzafaris/product-manager-os · 4 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_66c3dy2mk4bnfqqw GET https://markdownregistry.com/api/v1/resolve?ref=rizwanzafaris/product-manager-os/experiment-designer GET https://markdownregistry.com/api/v1/blob/20f735499c400baf2c5ccaf8a5ee79084d861ba2715ffef041247345ca850306
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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