market-sizing skillA
market-sizing is agent-read markdown (skill) from rizwanzafaris/product-manager-os: Size a market top-down and bottom-up as TAM, SAM, and SOM, reconcile the two within a stated tolerance, and register every input as an assumption with a source or a test. Use when a business case, a where-to-play choice, a board question, or a Gate 1 cost-of-inaction calculation needs a market number that survives the question "where did that come from". Takes a segment definition, a unit, a price with its source, and count sources; returns both sizings, the reconciliation, a sensitivity range, .
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
# Market Sizing: two methods that must agree, and every input on the record A market size fails when it is one number from an analyst headline, a small share of a large figure, and a spreadsheet nobody can reopen. The business case then rests on it, the board quotes it, and the first real customer count proves it wrong. This skill runs the sizing twice, from the top and from the bottom, forces the two to reconcile, and files every input where a reviewer can attack it. ## Files this skill drives - [../../frameworks/strategy/market-sizing.md](../../frameworks/strategy/market-sizing.md), the worksheet and its reconciliation table - [../../templates/definition/assumptions-register.md](../../templates/definition/assumptions-register.md), one row per input that is not a sourced fact - [../../templates/planning/business-case.md](../../templates/planning/business-case.md), where SOM lands in the benefits as a range with its assumption IDs beside it - [../../templates/discovery/evidence-note.md](../../templates/discovery/evidence-note.md), one per external figure, with the URL and the definition the source used …
Read the whole file at its exact version.
How to install
mdr add rizwanzafaris/product-manager-os/market-sizing@git:20260919.72235e0mdr add rizwanzafaris/product-manager-os/market-sizing@sha256:1b77a5b63413fd84Pin 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.
[](https://markdownregistry.com/a/art_k7nm26g5dvcoparp)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260919.72235e0 latest | 2026-09-19 | 72235e0 | 9,234 B | A | view · diff |
| git:20260903.a2ef42e | 2026-09-03 | a2ef42e | 7,512 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 (9234 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 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_k7nm26g5dvcoparp GET https://markdownregistry.com/api/v1/resolve?ref=rizwanzafaris/product-manager-os/market-sizing GET https://markdownregistry.com/api/v1/blob/1b77a5b63413fd84ac6392a2c0c12078166492236196b50b043601184281a569
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