TAM SAM SOM Calculator
deanpeters/Product-Manager-Skills
Calculates total, serviceable available and serviceable obtainable market size for a product idea with explicit assumptions, methods and caveats.
TAM/SAM/SOM calculations and market sizing methodologies. An agent skill from slgoodrich/agents.
Install Market Sizing Frameworks
$ npx skills add slgoodrich/agents --skill market-sizing-frameworks -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install slgoodrich/agents market-sizing-frameworks --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/slgoodrich/agents.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/ai-pm-copilot/skills/market-sizing-frameworks .claude/skills/market-sizing-frameworks && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "market-sizing-frameworks" agent skill from https://github.com/slgoodrich/agents/tree/main/plugins/ai-pm-copilot/skills/market-sizing-frameworks into .claude/skills/market-sizing-frameworks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "market-sizing-frameworks", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/slgoodrich/agents/tree/main/plugins/ai-pm-copilot/skills/market-sizing-frameworksType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add slgoodrich/agents --skill market-sizing-frameworks -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install slgoodrich/agents market-sizing-frameworks --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/slgoodrich/agents.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/ai-pm-copilot/skills/market-sizing-frameworks .agents/skills/market-sizing-frameworks && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "market-sizing-frameworks" agent skill from https://github.com/slgoodrich/agents/tree/main/plugins/ai-pm-copilot/skills/market-sizing-frameworks into .agents/skills/market-sizing-frameworks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "market-sizing-frameworks", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add slgoodrich/agents --skill market-sizing-frameworks -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install slgoodrich/agents market-sizing-frameworks --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/slgoodrich/agents.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/ai-pm-copilot/skills/market-sizing-frameworks .cursor/skills/market-sizing-frameworks && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "market-sizing-frameworks" agent skill from https://github.com/slgoodrich/agents/tree/main/plugins/ai-pm-copilot/skills/market-sizing-frameworks into .cursor/skills/market-sizing-frameworks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "market-sizing-frameworks", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/slgoodrich/agents.git --path plugins/ai-pm-copilot/skills/market-sizing-frameworks--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add slgoodrich/agents --skill market-sizing-frameworks -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install slgoodrich/agents market-sizing-frameworks --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/slgoodrich/agents.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/ai-pm-copilot/skills/market-sizing-frameworks .gemini/skills/market-sizing-frameworks && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "market-sizing-frameworks" agent skill from https://github.com/slgoodrich/agents/tree/main/plugins/ai-pm-copilot/skills/market-sizing-frameworks into .gemini/skills/market-sizing-frameworks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "market-sizing-frameworks", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install slgoodrich/agents market-sizing-frameworksInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add slgoodrich/agents --skill market-sizing-frameworks -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/slgoodrich/agents.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/ai-pm-copilot/skills/market-sizing-frameworks .github/skills/market-sizing-frameworks && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "market-sizing-frameworks" agent skill from https://github.com/slgoodrich/agents/tree/main/plugins/ai-pm-copilot/skills/market-sizing-frameworks into .github/skills/market-sizing-frameworks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "market-sizing-frameworks", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add slgoodrich/agents --skill market-sizing-frameworks -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install slgoodrich/agents market-sizing-frameworks --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/slgoodrich/agents.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/ai-pm-copilot/skills/market-sizing-frameworks .opencode/skills/market-sizing-frameworks && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "market-sizing-frameworks" agent skill from https://github.com/slgoodrich/agents/tree/main/plugins/ai-pm-copilot/skills/market-sizing-frameworks into .opencode/skills/market-sizing-frameworks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "market-sizing-frameworks", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
market-sizing-frameworks- GitHub stars
- 139
- Token cost
- ~3.3k tokens
- SKILL.md length
- 1,447 words
- Files
- 6 (incl. references, assets)
- Skills in repo
- 19
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
TAM/SAM/SOM calculations and market sizing methodologies. An agent skill from slgoodrich/agents.
- Works in 7 steps: Bottom-Up Calculation (Primary) → Top-Down Validation (Secondary) → Value Theory Check → …
- Assessing market opportunity
- SKILL.md covers Overview, When to Use This Skill, The Three-Tier Framework and Three Market Sizing Methods, plus 8 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Market Sizing Frameworks is an agent skill from slgoodrich/agents. TAM/SAM/SOM calculations and market sizing methodologies. Use when assessing market opportunity, estimating revenue potential, or validating if a market is worth pursuing. Trigger on: 'size my market', 'TAM SAM SOM', 'how big is my market', 'market opportunity', 'is this market worth it'.
Its SKILL.md is about 3.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including reference files and assets (for example `assets/market-sizing-calculator.md`, `assets/market-validation-checklist.md` and `assets/tam-sam-som-template.md`).
It sits in Product & Project Management, covering Market sizing and Startup and business strategy. The repository describes itself as: AI PM Workflows for Claude Code.
When your agent uses it
- Assessing market opportunity
- Estimating revenue potential
- Validating if a market is worth pursuing
- : size my market
Example prompts
- “size my market”
- “TAM SAM SOM”
- “how big is my market”
- “/market-sizing-frameworks”
Workflow steps
7 steps, taken from the step headings in SKILL.md.
- Bottom-Up Calculation (Primary)
- Top-Down Validation (Secondary)
- Value Theory Check
- Apply SAM Filters
- Calculate Realistic SOM
- Validate Thoroughly
- Document Assumptions
What it can do on your machine
Read from SKILL.md and the folder at commit 3b5835b. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Market Sizing Frameworks loads about 3.3k tokens when it runs, and up to ~18k if it reads all its reference files. Until then it costs about 79 tokens; SKILL.md has 1,447 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,447 words (~3,269 tokens).
“Frameworks and methodologies for estimating market size and validating market opportunity.”
- name
- market-sizing-frameworks
Files
SKILL.md and 5 other files (references, assets) in plugins/ai-pm-copilot/skills/market-sizing-frameworks of slgoodrich/agents.
- SKILL.md
- assets/market-sizing-calculator.md
- assets/market-validation-checklist.md
- assets/tam-sam-som-template.md
- references/market-sizing-best-practices.md
- references/market-sizing-methodologies.md
Open the folder on GitHubat commit 3b5835b
Compare with similar skills
Market Sizing Frameworks next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Market Sizing Frameworks this skillslgoodrich/agents | 139 | — | ~3.3k | Automated safety check: Pass | Custom licence | |
| TAM SAM SOM Calculatordeanpeters/Product-Manager-Skills | 7.2k | 1 repos | ~4.8k | Automated safety check: Pass | Custom licence | |
| Market Sizing Analysisnicepkg/auto-company | 194 | 11 repos | ~3.1k | Automated safety check: Pass | None | |
| Market Sizing Analysiswshobson/agents | 40k | 1 repos | ~620 | Automated safety check: Pass | MIT | |
| Startup Business Analyst Market Opportunityaiskillstore/marketplace | 430 | 7 repos | ~1.8k | Automated safety check: Notes | None | |
| Discover Market Sizingproduct-on-purpose/pm-skills | 715 | — | ~3.3k | Automated safety check: Pass | Apache-2.0 |
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Categories
Questions about Market Sizing Frameworks
What does Market Sizing Frameworks do?
TAM/SAM/SOM calculations and market sizing methodologies. An agent skill from slgoodrich/agents. Market Sizing Frameworks is an agent skill from slgoodrich/agents. TAM/SAM/SOM calculations and market sizing methodologies.
When should I use Market Sizing Frameworks?
Market Sizing Frameworks fits situations like: assessing market opportunity; estimating revenue potential; validating if a market is worth pursuing; : size my market.
How do I install Market Sizing Frameworks in Claude Code?
Run `npx skills add slgoodrich/agents --skill market-sizing-frameworks -a claude-code`. Or copy the skill folder (plugins/ai-pm-copilot/skills/market-sizing-frameworks in slgoodrich/agents) into .claude/skills/market-sizing-frameworks in your project. Claude Code loads it when a task matches its description.
How do I install Market Sizing Frameworks in Codex?
Run `npx skills add slgoodrich/agents --skill market-sizing-frameworks -a codex`. Or copy the skill folder (plugins/ai-pm-copilot/skills/market-sizing-frameworks in slgoodrich/agents) into .agents/skills/market-sizing-frameworks in your project. Codex loads it when a task matches its description.
Can I use Market Sizing Frameworks in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add slgoodrich/agents --skill market-sizing-frameworks -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/market-sizing-frameworks, .gemini/skills/market-sizing-frameworks, .github/skills/market-sizing-frameworks and .opencode/skills/market-sizing-frameworks in your project.
What does Market Sizing Frameworks need to run?
SKILL.md names no scripts, command-line tools or credentials: Market Sizing Frameworks is instructions for the agent only.
Does Market Sizing Frameworks access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Market Sizing Frameworks safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Market Sizing Frameworks use?
Market Sizing Frameworks has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Market Sizing Frameworks use?
About 3.3k tokens (SKILL.md is roughly 13k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 14k tokens, read only when the agent opens those files.
What are the alternatives to Market Sizing Frameworks?
Skills that share tags, products or a category with Market Sizing Frameworks: TAM SAM SOM Calculator (deanpeters/Product-Manager-Skills, 7.2k stars), Market Sizing Analysis (nicepkg/auto-company, 194 stars), Market Sizing Analysis (wshobson/agents, 40k stars) and Startup Business Analyst Market Opportunity (aiskillstore/marketplace, 430 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Market Sizing Frameworks?
slgoodrich (a GitHub user) maintains it in slgoodrich/agents, which has 139 GitHub stars. The repository holds 19 skills in this directory. The repository was last updated on April 10, 2026.
Source: slgoodrich/agents on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.