cbrock84/headcount · plugins/demand-generation/skills/experimentation/SKILL.md

experimentation skillA

experimentation is agent-read markdown (skill) from cbrock84/headcount: Designs, runs, and reads A/B tests and growth experiments — hypothesis, sample size, duration, and honest interpretation. Use this to plan a test, judge whether a result is real, build an experimentation program, decide what to test next, or diagnose why tests keep producing inconclusive or non-replicating results..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add cbrock84/headcount/experimentation@git:20260901.49e89d6
Exact content
mdr add cbrock84/headcount/experimentation@sha256:b62b173f34903692

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_bjxncyzfowck5nla.svg)](https://markdownregistry.com/a/art_bjxncyzfowck5nla)

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Versions

versioncommittedcommitsizeaudit
git:20260901.49e89d6 latest2026-09-01 49e89d6 3,554 BA view · diff
git:20260901.b973f202026-09-01 b973f20 2,897 BA view · diff
git:20260828.f80dcb52026-08-28 f80dcb5 2,462 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (3554 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

GitHub

cbrock84/headcount · 1,590 stars · license MIT · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_bjxncyzfowck5nla
GET https://markdownregistry.com/api/v1/resolve?ref=cbrock84/headcount/experimentation
GET https://markdownregistry.com/api/v1/blob/b62b173f34903692559d511d653787607c739f06459da8f560aa23aa1afe07ab

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.