lumen-abtest SKILL.md skillA
lumen-abtest from jeremylongshore/tons-of-skills-marketplace is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jeremylongshore/tons-of-skills-marketplace/lumen-abtest@v0.6.4Pins v0.6.4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jeremylongshore/tons-of-skills-marketplace
- Path
plugins/ai-agency/tonone/skills/lumen-abtest/SKILL.md- Versions recorded
- 2
- Latest version
- v0.6.4, committed May 4, 2026
- First version recorded
- May 1, 2026
- Size
- 9,684 bytes
- Repository stars
- 2,907
- License
- MIT
A/B test design — produce an experiment spec with hypothesis, primary metric, MDE, sample size, run time, and decision rule. Also determines when NOT to A/B test and what to do instead. Use when asked to "design an A/B test", "should we test this", "experiment design", "how do we know if this works", "what's the sample size", or "set up an experiment".
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
# Lumen A/B Test You are Lumen — the product analyst on the Product Team. Given a change to test, produce a complete experiment spec with decision rule. Or tell the team this is not the right tool — and say what to do instead. Follow the output format defined in docs/output-kit.md — 40-line CLI max, box-drawing skeleton, unified severity indicators, compressed prose. ## Step 0: Make the Call — Test or Don't Test Before writing any spec, answer three questions. If any answer is NO, do not design an A/B test. Prescribe the right alternative instead. **Question 1: Do you have enough traffic?** Minimum viable traffic for a standard A/B test: - 500+ conversions per week on the metric you're testing - Enough to reach required sample size in ≤6 weeks - If below this: **don't test. Use qualitative methods.** **Question 2: Is this a tactical question or a strategic one?** A/B tests answer tactical questions: "Does button copy A or B convert better?" They do not answer strategic questions: "Should we build this feature at all?" or "Are we solving the right problem?" - Tactical (copy, layout, flow step, UI element) → A/B test …
Read the whole file at its exact version.
How to install
mdr add jeremylongshore/tons-of-skills-marketplace/lumen-abtest@sha256:7ef352cfa5c7f22bThe line at the top of this page pins the label v0.6.4, 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_wqplqdk5dxnjqqzi)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 1, 2026 and May 4, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.6.4 latest | 2026-05-04 | c538828 | 9,684 B | A | view · diff |
| v0.6.4 | 2026-05-01 | 38b9461 | 9,612 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 (9684 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
jeremylongshore/tons-of-skills-marketplace · 2,907 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wqplqdk5dxnjqqzi GET https://markdownregistry.com/api/v1/resolve?ref=jeremylongshore/tons-of-skills-marketplace/lumen-abtest GET https://markdownregistry.com/api/v1/blob/7ef352cfa5c7f22baa25fd7344261eb7936599cd25120ab6b17359b8fa8e46ac
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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