market-sizing-analysis

market-sizing-analysis is a skill for Claude Code from frank-luongt/faos-skills-marketplace. It costs 0 tokens per session (2,880 once invoked), scanned A, a copy of market-sizing-analysis, Apache-2.0.

A guide to estimating the size of a market for a product or service. TAM means the whole possible market, SAM the part a business can serve, and SOM the part it may realistically win.

In plain words
What is it for?
Use it to calculate TAM, SAM, and SOM with top-down, bottom-up, and value-based approaches.
Why use it?
It helps founders and teams test whether an opportunity is large enough and support strategy, fundraising, or product-market-fit work.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the faos-analyst plugin — 22 skills, 6 commands shipped together

Good fit Use it to calculate TAM, SAM, and SOM with top-down, bottom-up, and value-based approaches.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/frank-luongt/faos-skills-marketplace/market-sizing-analysis
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.

Any agent
npx skills add frank-luongt/faos-skills-marketplace --skill market-sizing-analysis
Clone the repo
git clone --depth 1 https://github.com/frank-luongt/faos-skills-marketplace

Made for: Claude Code.

Or install faos-analyst, the plugin that ships this one along with the rest of its 22 skills, 6 commands.

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 market-sizing-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/frank-luongt/faos-skills-marketplace/market-sizing-analysis/github.svg)](https://agentmods.dev/skills/frank-luongt/faos-skills-marketplace/market-sizing-analysis)
Your own site
<a href="https://agentmods.dev/skills/frank-luongt/faos-skills-marketplace/market-sizing-analysis"><img src="https://agentmods.dev/badge/skills/frank-luongt/faos-skills-marketplace/market-sizing-analysis/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for market-sizing-analysis

Your own site · 80×15
<a href="https://agentmods.dev/skills/frank-luongt/faos-skills-marketplace/market-sizing-analysis"><img src="https://agentmods.dev/badge/skills/frank-luongt/faos-skills-marketplace/market-sizing-analysis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,880 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 88% copy Near-identical to another mod 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 $0.00000 $0.02880
Opus 5.5 $0.00000 $0.01152
Sonnet 5.5 $0.00000 $0.00576
Haiku 4.5 $0.00000 $0.00288

Measured 1mo ago against content hash 22022f998ad0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

market-sizing-analysis 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 1mo 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.

Origin

This is a copy

88% identical to market-sizing-analysis — 89 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/faos-analyst/skills/market-sizing-analysis/SKILL.md · 424 lines

How it starts

The opening of the file, as written. The whole thing — 424 lines — stays where its author put it; the contents beside it link to each section on GitHub.


name: market-sizing-analysis description: Calculate TAM, SAM, and SOM using top-down, bottom-up, and value-theory methodologies. Use when sizing a market opportunity, preparing investor materials, or validating product-market fit. tags: [market-sizing, tam-sam-som, strategy, investor-readiness]

Market Sizing Analysis

Comprehensive market sizing methodologies for calculating Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) for startup opportunities.

Use this skill when

  • Working on market sizing analysis tasks or workflows
  • Needing guidance, best practices, or checklists for market sizing analysis

Do not use this skill when

  • The task is unrelated to market sizing analysis
  • You need a different domain or tool outside this scope

Instructions

  • Clarify goals, constraints, and required inputs.
  • Apply relevant best practices and validate outcomes.
  • Provide actionable steps and verification.

Overview

Market sizing provides the foundation for startup strategy, fundraising, and business planning. Calculate market opportunity using three complementary methodologies: top-down (industry reports), bottom-up (customer segment calculations), and value theory (willingness to pay).

Core Concepts

The Three-Tier Market Framework

TAM (Total Addressable Market)

  • Total revenue opportunity if achieving 100% market share
  • Defines the universe of potential customers
  • Used for long-term vision and market validation
  • Example: All email marketing software revenue globally

SAM (Serviceable Available Market)

  • Portion of TAM targetable with current product/service
  • Accounts for geographic, segment, or capability constraints
  • Represents realistic addressable opportunity
  • Example: AI-powered email marketing for e-commerce in North America

SOM (Serviceable Obtainable Market)

  • Realistic market share achievable in 3-5 years
  • Accounts for competition, resources, and market dynamics
  • Used for financial projections and fundraising
  • Example: 2-5% of SAM based on competitive landscape

Read the full file on GitHub · 424 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 424 lines · 0 tokens per session scan A 22022f998ad0

Subscribe to this mod's changes

market-sizing-analysis is a skill published in the GitHub repository frank-luongt/faos-skills-marketplace (37 stars, last pushed 3mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 2,880 tokens. A static security scan graded it A with 0 findings. It is 88% identical to market-sizing-analysis, differing in 89 lines, and is treated as a copy.

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