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]?"