tam-sam-som-builder

tam-sam-som-builder is a cursor rule for Cursor from MaxKmet/idea-validation-agents. It costs 26 tokens per session (70 once invoked), scanned A, original, MIT.

A set of rules for estimating market size at three levels: the entire possible market, the part a product can serve, and the realistic share it could capture. These are commonly called TAM, SAM, and SOM.

In plain words
What is it for?
Use it to estimate a product’s total market, reachable market, and plausible early share.
Why use it?
It replaces vague market-size claims with estimates built from individual customers or transactions and supported by real data.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/maxkmet/idea-validation-agents/tam-sam-som-builder
Clone the repo
git clone --depth 1 https://github.com/MaxKmet/idea-validation-agents

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for tam-sam-som-builder

README.md
[![agentmods](https://agentmods.dev/badge/rules/maxkmet/idea-validation-agents/tam-sam-som-builder.svg)](https://agentmods.dev/rules/maxkmet/idea-validation-agents/tam-sam-som-builder)
Your own site
<a href="https://agentmods.dev/rules/maxkmet/idea-validation-agents/tam-sam-som-builder"><img src="https://agentmods.dev/badge/rules/maxkmet/idea-validation-agents/tam-sam-som-builder.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 70 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00026 $0.00070
Opus 5 $0.00013 $0.00035
Sonnet 5 $0.00005 $0.00014
Haiku 4.5 $0.00003 $0.00007

Measured 6d ago against content hash 805c0cd456d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

tam-sam-som-builder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/tam-sam-som-builder.mdc · 7 lines

What it actually says

See skills/tam-sam-som-builder/SKILL.md for full instructions and output schema.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 7 lines · 26 tokens per session scan A 805c0cd456d4

Subscribe to this mod's changes

tam-sam-som-builder is a cursor rule published in the GitHub repository MaxKmet/idea-validation-agents (448 stars, last pushed 2mo ago), licensed MIT. It adds 26 tokens to every session and 70 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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