market-sizing SKILL.md skillA
market-sizing from rizwanzafaris/product-manager-os is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rizwanzafaris/product-manager-os/market-sizing@git:20260919.72235e0Pins git:20260919.72235e0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rizwanzafaris/product-manager-os
- Path
skills/market-sizing/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260919.72235e0, committed Sep 19, 2026
- First version recorded
- Sep 3, 2026
- Size
- 9,234 bytes
- Repository stars
- 4
- License
- MIT
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…
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
# 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@sha256:1b77a5b63413fd84The line at the top of this page pins the label git:20260919.72235e0, 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_k7nm26g5dvcoparp)
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Versions
The registry has recorded 2 versions of this file, between Sep 3, 2026 and Sep 19, 2026, about one every 16 days.
| 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 2026-11-04 · 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
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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