Agent skill

Product Brief

by emotixco in emotixco/claude-skills-founder

Turn a one-sentence startup idea into a structured product brief with problem, audience, value proposition, 5-7 MVP features, 90-day metrics, risks, and a go-to-market snapshot.

MITAuto-check passedMarketing & SEO

Install Product Brief

skills CLI
$ npx skills add emotixco/claude-skills-founder --skill product-brief -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install emotixco/claude-skills-founder product-brief --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/emotixco/claude-skills-founder.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/product-brief .claude/skills/product-brief && rm -rf skills-src

Use ~/.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/

Facts

Skill name
product-brief
GitHub stars
540
Token cost
~579 tokens
SKILL.md length
274 words
Files
1
Skills in repo
13
Repo updated
First seen
Licence
MIT

At a glance

Turn a one-sentence startup idea into a structured product brief with problem, audience, value proposition, 5-7 MVP features, 90-day metrics, risks, and a go-to-market snapshot.

  • Works in 7 steps: Problem statement. What specific pain… → Target audience. Name the primary… → Value proposition. One sentence that… → …
  • A founder wants to write down what they are building and for whom
  • SKILL.md covers Before you start, Instructions and Rules
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Product Brief is an agent skill from emotixco/claude-skills-founder. Turn a one-sentence startup idea into a structured product brief with problem, audience, value proposition, 5-7 MVP features, 90-day metrics, risks, and a go-to-market snapshot. Use when a founder wants to write down what they are building and for whom.

Its SKILL.md is about 580 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Marketing & SEO, covering Go-to-market strategy and Positioning and messaging. The repository describes itself as: Claude Code skills for startup founders — product briefs, competitor analysis, pricing strategy, pitch decks, and GTM plans from your terminal. The licence is MIT.

When your agent uses it

  • A founder wants to write down what they are building and for whom
  • Tasks that involve Go-to-market strategy
  • Tasks that involve Positioning and messaging

Example prompts

  • “/product-brief”

Requirements

  • Pre-approved tools (allowed-tools): Read, Edit(founder/**), WebSearch, WebFetch

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

  1. Problem statement. What specific pain does this solve? Who feels it most? How do they deal with it today?
  2. Target audience. Name the primary audience in one specific sentence. Not "small business owners" but "solo SaaS founders under $10K MRR…
  3. Value proposition. One sentence that passes the "so what?" test. Format: "[Product] helps [audience] [achieve outcome] by [mechanism]…
  4. Core features (MVP). Exactly 5-7 features. For each: name, a one-line description, and why the product can't launch without it.
  5. Success metrics. 3-5 measurable KPIs with targets for the first 90 days. Include leading indicators, not just revenue.
  6. Risks and assumptions. The top 3 assumptions that must be true for this to work, and how to test each one for under $500 in under 2 weeks.
  7. Go-to-market snapshot. The first 3 channels to try, an estimated CAC range for each (marked as an estimate unless sourced), and one growth…

What it can do on your machine

Read from SKILL.md and the folder at commit 0602cad. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Edit(founder/**)
    • WebSearch
    • WebFetch

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    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

Product Brief loads about 579 tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 274 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~67
When it runs · the whole SKILL.md, loaded when a task matches
~579

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

The full file from emotixco/claude-skills-founder at commit 0602cad, republished under its MIT licence (© emotixco). 274 words, ~579 tokens.

Download SKILL.mdSave it as .claude/skills/product-brief/SKILL.md (or your agent's skills folder).
name
product-brief
description
Turn a one-sentence startup idea into a structured product brief with problem, audience, value proposition, 5-7 MVP features, 90-day metrics, risks, and a go-to-market snapshot. Use when a founder wants to write down what they are building and for whom.
allowed-tools
Read, Edit(founder/**), WebSearch, WebFetch
argument-hint
[your startup idea in one sentence]

You are a product strategist. You turn a startup idea into a brief a small team can build from.

Input: $ARGUMENTS

Before you start

Read ${CLAUDE_PLUGIN_ROOT}/shared/conventions.md and follow it.

  • Reads: founder/facts.md, founder/validate-idea.md, founder/persona-gen.md, founder/competitor-matrix.md
  • Needs: the idea in one sentence
  • Saves to: founder/product-brief.md

Instructions

  1. Problem statement. What specific pain does this solve? Who feels it most? How do they deal with it today?

  2. Target audience. Name the primary audience in one specific sentence. Not "small business owners" but "solo SaaS founders under $10K MRR who spend 8+ hours a week tracking competitors by hand". If founder/persona-gen.md exists, use its primary persona. Otherwise add one line suggesting /founder:persona-gen for full personas.

  3. Value proposition. One sentence that passes the "so what?" test. Format: "[Product] helps [audience] [achieve outcome] by [mechanism], unlike [alternative] which [limitation]."

  4. Core features (MVP). Exactly 5-7 features. For each: name, a one-line description, and why the product can't launch without it.

  5. Success metrics. 3-5 measurable KPIs with targets for the first 90 days. Include leading indicators, not just revenue.

  6. Risks and assumptions. The top 3 assumptions that must be true for this to work, and how to test each one for under $500 in under 2 weeks.

  7. Go-to-market snapshot. The first 3 channels to try, an estimated CAC range for each (marked as an estimate unless sourced), and one growth tactic specific to this product.

Rules

  • Be specific and opinionated. Generic advice is useless.
  • Use numbers, not words like "some" or "many".
  • If the idea is vague, make reasonable assumptions and state them.
  • Output clean markdown with headers and bullets.
  • Keep total output under 1500 words.

© emotixco, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/product-brief of emotixco/claude-skills-founder.

Open the folder on GitHubat commit 0602cad

Compare with similar skills

Product Brief 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.

Product Brief compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Product Brief this skillemotixco/claude-skills-founder540—~579Automated safety check: PassMIT
Global Marketing Planminhnv0807/ai-business-skills609—~4.4kAutomated safety check: PassMIT
Positioning BasicsBrianRWagner/ai-marketing-claude-code-skills441—~1.9kAutomated safety check: PassNone
Strategy AgentAtmosphere/atmosphere3.8k—~280Automated safety check: PassApache-2.0
22 Personal Brand Context Globalminhnv0807/ai-business-skills609—~2.8kAutomated safety check: PassMIT
23 Personal Brand Strategy Globalminhnv0807/ai-business-skills609—~4.2kAutomated safety check: PassMIT

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  • Positioning Basics

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Categories

Questions about Product Brief

What does Product Brief do?

Turn a one-sentence startup idea into a structured product brief with problem, audience, value proposition, 5-7 MVP features, 90-day metrics, risks, and a go-to-market snapshot. Product Brief is an agent skill from emotixco/claude-skills-founder. Turn a one-sentence startup idea into a structured product brief with problem, audience, value proposition, 5-7 MVP features, 90-day metrics, risks, and a go-to-market snapshot.

When should I use Product Brief?

Product Brief fits situations like: A founder wants to write down what they are building and for whom; tasks that involve Go-to-market strategy; tasks that involve Positioning and messaging.

How do I install Product Brief in Claude Code?

Run `npx skills add emotixco/claude-skills-founder --skill product-brief -a claude-code`. Or copy the skill folder (skills/product-brief in emotixco/claude-skills-founder) into .claude/skills/product-brief in your project. Claude Code loads it when a task matches its description.

How do I install Product Brief in Codex?

Run `npx skills add emotixco/claude-skills-founder --skill product-brief -a codex`. Or copy the skill folder (skills/product-brief in emotixco/claude-skills-founder) into .agents/skills/product-brief in your project. Codex loads it when a task matches its description.

Can I use Product Brief 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 emotixco/claude-skills-founder --skill product-brief -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/product-brief, .gemini/skills/product-brief, .github/skills/product-brief and .opencode/skills/product-brief in your project.

What does Product Brief need to run?

SKILL.md names no scripts, command-line tools or credentials: Product Brief is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Edit(founder/**), WebSearch, WebFetch.

Does Product Brief 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 Product Brief 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 Product Brief use?

Product Brief is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Product Brief use?

About 579 tokens (SKILL.md is roughly 2.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Product Brief?

Skills that share tags, products or a category with Product Brief: Global Marketing Plan (minhnv0807/ai-business-skills, 609 stars), Positioning Basics (BrianRWagner/ai-marketing-claude-code-skills, 441 stars), Strategy Agent (Atmosphere/atmosphere, 3.8k stars) and 22 Personal Brand Context Global (minhnv0807/ai-business-skills, 609 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Product Brief?

emotixco (a GitHub organization) maintains it in emotixco/claude-skills-founder, which has 540 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on October 7, 2026.

Source: emotixco/claude-skills-founder on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.