pmf-strategy
When the user wants to validate product-market fit, measure PMF, or plan before scaling. Also use when the user mentions "PMF," "product-market fit," "product market fit," "Sean Ellis test," "very disappointed," "vitamin vs painkiller," "PMF validation," "premature scaling," or "validate before scale." For GTM after validation, use gtm-strategy.
npx skills add kostja94/marketing-skills --skill pmf --agent cursor
Same command for any agent — swap --agent for claude-code, codex, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Strategies: Product-Market Fit Guides product-market fit (PMF) validation and measurement. PMF occurs when a product precisely meets market needs, creating widespread demand. ~99% of startups fail primarily due to PMF issues (vitamin problems, premature scaling). Use this skill when validating before scaling, measuring PMF, or diagnosing traction problems. **When invoking**: On **first use**, if helpful, open with 1–2 sentences on what this skill covers and why it matters, then provide the main output. On **subsequent use** or when the user asks to skip, go directly to the main output. ## Definition **Product-market fit** (Marc Andreessen): "Being in a good market with a product that can satisfy that market." **Signals**: Customers buying rapidly; usage growing; word-of-mouth spreading organically; high retention, low churn. ## Sean Ellis 40% Test **Question**: "How would you feel if you could no longer use [product]?" | Response | Meaning | |----------|---------| | **Very disappointed** | Strong PMF signal | | Somewhat disappointed | — | | Not disappointed | — | | N/A – I no longer use | — | **Threshold**: 40%+ answering "very disappointed" = PMF achieved. Below 40% = iterate. |
- Definition
- Sean Ellis 40% Test
- Vitamin vs Painkiller
- Key Indicators
- Common Failures
- Product Research & SaaS Context
- PMF as Continuous Process
- Output Format
- Related Skills
What does the pmf-strategy skill do?
When the user wants to validate product-market fit, measure PMF, or plan before scaling. Also use when the user mentions "PMF," "product-market fit," "product market fit," "Sean Ellis test," "very disappointed," "vitamin vs painkiller," "PMF validation," "premature scaling," or "validate before scale." For GTM after validation, use gtm-strategy.
How do I install it?
Run `npx skills add kostja94/marketing-skills --skill pmf --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From kostja94/marketing-skills, a repository with 848 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.