product-discovery is agent-read markdown (skill) from cbrock84/headcount: Finds out whether a problem is real and a solution would work, before building it — recruiting the right people, interviewing without leading them, separating what users say from what they do, naming the riskiest assumption and testing that one first, and reaching a decision rather than a summary. Use this to validate a problem, test an idea cheaply, decide whether to build something, or fix a discovery process that keeps confirming what the team already believed..
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.
What the file says
# Product discovery
Discovery is how you find out you were wrong while it is still cheap. A process that never kills
anything is not discovery, it is a preparation ritual with research attached.
## Start from the assumption that would sink this if it were false
Every idea rests on a stack: that the problem exists, that people care enough to change what they
do, that your approach solves it, that they would pay, that you can build and deliver it. They are
not equally uncertain, and testing them in order of comfort is how teams spend six weeks confirming
the safe one.
Write the assumptions down, mark the one that would be most damaging to be wrong about, and test
that one first. Usually it is the second: the problem is real, and people are living with it
comfortably enough not to move.
## Recruit the people who have the problem, not the people who are easy to reach
Interviewing your friendliest customers produces reliable encouragement. Talk to people who churned,
people who evaluated and chose something else, and people who solved it another way — those three
groups carry most of the information.
…
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.
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 (4097 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 · 1,664 stars · license MIT · pushed 2026-09-17 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gg6a5zaazjeex5tn
GET https://markdownregistry.com/api/v1/resolve?ref=cbrock84/headcount/product-discovery
GET https://markdownregistry.com/api/v1/blob/751d96d2a65ff8532a977f545b9263c0a98d6519c3246f2cbdf61e0a73203d0e
Your agent 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.
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