# Market Size Estimator

> This prompt instructs the AI to act as a business analyst and produce a reasoned estimate of the Total Addressable Market, Serviceable Addressable Market, and Serviceable Obtainable Market for a specified product, industry, geography, and customer type. The expected outcome is a structured analysis that defines market boundaries, documents assumptions, walks through the calculation logic step by step, cites credible public data sources where possible, and summarizes key drivers and uncertainties in both a table and a brief narrative.

- Skill: `majiayu000/market-size-estimator` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/market-size-estimator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/market-size-estimator/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/market-size-estimator

---


## What it does

This prompt instructs the AI to act as a business analyst and produce a reasoned estimate of the Total Addressable Market, Serviceable Addressable Market, and Serviceable Obtainable Market for a specified product, industry, geography, and customer type. The expected outcome is a structured analysis that defines market boundaries, documents assumptions, walks through the calculation logic step by step, cites credible public data sources where possible, and summarizes key drivers and uncertainties in both a table and a brief narrative.

> Requires the **betterprompt** CLI to run. For installation and general CLI usage, refer to the `betterprompt` skill in your skill list or if not yet available in skill list, install via `npx skills add https://github.com/BetterPromptme/betterprompt/skills --skill betterprompt`

## Inputs


### textInputs

Pass each text input using `--input <key>=<value>` flags.

| Variable key | Required? | Description | Defaults |
| --- | ---: | --- | --- |
| `product` | Optional | Briefly describe the product or business idea to estimate market size for | `AI-powered resume screening tool for recruiters` |
| `industry` | Optional | The main industry or sector (e.g., FinTech, HR Tech, food delivery) | `HR Tech` |
| `geography` | Required | Geographic region for market sizing Allowed options: europe, global, asia-pacific, latin-america, north-america | (none) |
| `customerType` | Required | The primary target customer category Allowed options: b2b, b2c, both | (none) |



### Models and options

This skill's modality is: **`text`**.

To discover which `model` values you can use (and which `options` keys/values are valid for each model), run:

```bash
betterprompt resources --models-only --json
```

Then filter the returned JSON array to entries where `modality` is `"text"`.

## How to run

### Step 1: Collect inputs

First, run `betterprompt resources --models-only --json` and filter to `modality: "text"` to discover valid models and available options:

```bash
betterprompt resources --models-only --json
```

Use only the models and option values that appear in the filtered results.

Then collect all inputs from the human:


- Required text inputs:
    - `geography`
  - `customerType`
- Optional text inputs (use defaults if not provided by the human):
    - `product` (default: `AI-powered resume screening tool for recruiters`)
  - `industry` (default: `HR Tech`)
- Optional: model and options.
  - Present the human with the default model **`gpt-4o`** and its available options. Look up `gpt-4o` in the `betterprompt resources` output (filtered to modality `"text"`) and show its `availableOptions` as: `key: val1, val2 (default), val3  |  key2: ...`. Mark a value `(default)` if it matches these defaults: `{}`.
  - If the human does not specify, defaults are used: model `gpt-4o`, options `{}`. Other models from the resources call are also available.

If any required text input is missing, **ask the human for what's missing**. Do not assume or fabricate values.

### Step 2: Run via BetterPrompt CLI

Use the frontmatter's `skillVersionId` as the positional argument (for this skill version, use `019ce19a-75a7-74b9-b97c-e54f16fa317d`).

Command form:

```bash
betterprompt generate 019ce19a-75a7-74b9-b97c-e54f16fa317d \
  [--input <key>=<value>] \
  [--model <model>] \
  [--options <options JSON>] \
  [--json]
```

Notes:

- Pass each text input as a separate `--input <key>=<value>` flag.
- If the human does **not** mention a model, **omit** `--model` and BetterPrompt will use the default model: **`gpt-4o`**.
- If the human does **not** mention options, **omit** `--options` and BetterPrompt will use the default options: **`{}`**.
- If the run times out, the response will include a `runId` you can use to fetch the result later.

Example (using defaults shown above):

```bash
betterprompt generate 019ce19a-75a7-74b9-b97c-e54f16fa317d \
  --input 'product=AI-powered resume screening tool for recruiters' \
  --input 'industry=HR Tech' \
  --input geography=europe \
  --input customerType=b2b \
  --model gpt-4o \
  --options '{}'
```