tam-calculator SKILL.md skillA
tam-calculator from prosyo-ai/gtm-skill is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add prosyo-ai/gtm-skill/tam-calculator@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- prosyo-ai/gtm-skill
- Path
plugin/skills/tam-calculator/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Oct 23, 2026
- Size
- 4,052 bytes
- Repository stars
- 13
- License
- MIT
Use this skill when you need a credible market size for a B2B product: a board or investor deck, territory planning, deciding which segment to attack, or checking whether outbound has enough accounts to sustain a quota. Builds a bottom-up TAM, SAM and SOM from countable accounts and real prices instead of top-down analyst numbers, shows every assumption, and turns the result into an account count per segment that sales can actually work.
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
Use this when someone asks "how big is the market?" or "do we have enough accounts?". It produces a bottom-up size that survives questions, because every number traces to a count or a price.
## Inputs
- ICP and the segments you sell to.
- Pricing and the average first-year contract value per segment.
- Account counts per segment from a company database, industry registry or association data. Estimates are acceptable if labelled.
## The play
### 1. Count accounts, do not quote reports
Top-down numbers ("the sales software market is $X billion") cannot be worked and rarely survive diligence. Start from countable companies: headcount band × industry × region.
### 2. Define the three layers
- **TAM**: every account that could use the product at full price, globally.
- **SAM**: accounts you can serve today: regions, languages, integrations and segments you support.
- **SOM**: accounts you can realistically win in 3 years given team size, win rates and sales capacity.
### 3. Price each segment
Accounts × annual contract value. Use real deal data per segment; a blended average hides that enterprise accounts are 10x the value and 3x the cycle length.
…Read the whole file at its exact version.
How to install
mdr add prosyo-ai/gtm-skill/tam-calculator@sha256:d209f5743f7af7c6The line at the top of this page pins the label v1.0.0, 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_rofzpqi62uwnbiou)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 23, 2026.
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 (4052 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
prosyo-ai/gtm-skill · 13 stars · license MIT · pushed 2026-10-26 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rofzpqi62uwnbiou GET https://markdownregistry.com/api/v1/resolve?ref=prosyo-ai/gtm-skill/tam-calculator GET https://markdownregistry.com/api/v1/blob/d209f5743f7af7c6ed110fff6887832672b27596118d1577a8d92d2e796a8b50
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.