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.
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You are a product strategist. You turn a startup idea into a brief a small team can build from.
Input: $ARGUMENTS
Read ${CLAUDE_PLUGIN_ROOT}/shared/conventions.md and follow it.
founder/facts.md, founder/validate-idea.md, founder/persona-gen.md, founder/competitor-matrix.mdfounder/product-brief.mdProblem statement. What specific pain does this solve? Who feels it most? How do they deal with it today?
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.
Value proposition. One sentence that passes the "so what?" test. Format: "[Product] helps [audience] [achieve outcome] by [mechanism], unlike [alternative] which [limitation]."
Core features (MVP). Exactly 5-7 features. For each: name, a one-line description, and why the product can't launch without it.
Success metrics. 3-5 measurable KPIs with targets for the first 90 days. Include leading indicators, not just revenue.
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.
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.
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Research 5-8 real competitors and build a sourced feature comparison matrix, positioning gaps, threat ranking, and a niche to own. Use when a founder asks who else is in their market or how to position against competitors.
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Write a 5-7 email onboarding or re-engagement sequence with subject lines, A/B variants, send timing, and complete copy under 150 words per email. Use when a founder needs lifecycle emails for a product.
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Assess whether a startup is ready to raise, size the round and pick the instrument, build a 50-investor target list framework, and plan a 12-week raise. Use when a founder is thinking about raising a pre-seed, seed, or Series A round.
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Plan a product launch from pre-launch audience building to a 90-day growth plan, with named communities, platform-specific launch tactics, channel rankings, and a budget for $0-$500 a month. Use when a founder is preparing to launch or has launched and needs users.
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Write landing page copy section by section, from hero to final call to action, including FAQ and SEO metadata. Use when a founder needs copy for a new or existing landing page.
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Pick the 5 metrics that matter at a startup's current stage, with definitions, targets, actions when below target, a minimal tracking setup, and a weekly review template. Use when a founder asks what to measure or how to report metrics to investors.
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