design-experiment SKILL.md skillA
design-experiment from tomzx/agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tomzx/agents/design-experiment@git:20261007.b35fc4bPins git:20261007.b35fc4b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tomzx/agents
- Path
skills/pdlc/skills/design-experiment/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261007.b35fc4b, committed Oct 7, 2026
- First version recorded
- Aug 5, 2026
- Size
- 2,222 bytes
- Repository stars
- 12
- License
- MIT
Design the cheapest decisive test for an initiative's riskiest assumptions — fake-door, concierge, prototype, or survey. Part of the PDLC Validate phase.
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
# Design Experiment
For each leap-of-faith assumption, design the test that, at minimum cost, would change your decision.
The goal is decisiveness, not completeness: a test whose result cannot flip the verdict is not worth running.
## Prerequisites
- Apply the shared PDLC conventions in `skills/pdlc/references/shared.md`.
- `assumptions.md` with the ranked leap-of-faith assumptions.
## Steps
1. For each top assumption, define the hypothesis in testable form: *If [we do X], then [we expect Y], because [belief].*
2. Choose the cheapest method that can falsify it:
- **Fake-door / painted-door** — does demand exist before building?
(desirability)
- **Concierge / Wizard-of-Oz** — deliver the value manually; is the outcome genuine?
(viability/feasibility)
- **Prototype** — can they use it / does the workflow fit?
(usability)
- **Survey / interview** — only for beliefs you cannot observe behaviorally; treat as weak evidence.
3. Set the decision threshold up front: the numeric result that means proceed vs. kill.
Decide the threshold *before* running, not after.
4. Define the audience, sample size, duration, and what you will measure.
…Read the whole file at its exact version.
How to install
mdr add tomzx/agents/design-experiment@sha256:25b7373bb1bc770aThe line at the top of this page pins the label git:20261007.b35fc4b, 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_iiyu62zrtmfuymu4)
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Versions
The registry has recorded 3 versions of this file, between Aug 5, 2026 and Oct 7, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261007.b35fc4b latest | 2026-10-07 | b35fc4b | 2,222 B | A | view · diff |
| git:20261004.00bb0c5 | 2026-10-04 | 00bb0c5 | 2,201 B | A | view · diff |
| git:20260805.6b62307 | 2026-08-05 | 6b62307 | 2,195 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 (2222 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
tomzx/agents · 12 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_iiyu62zrtmfuymu4 GET https://markdownregistry.com/api/v1/resolve?ref=tomzx/agents/design-experiment GET https://markdownregistry.com/api/v1/blob/25b7373bb1bc770a34aedd6b11c858fcc29422e9c25975bbdd3c6c95c7cb1808
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.