measuring-product-market-fitlisted

## Company Context Before helping, read `MEMORY.md` for: current wedge, ICP, competitors, PMF stage, system constraint. Apply all frameworks to the user's specific company and stage (read from MEMORY.md). Follow output preferences from USER.md (language, format, platform constraints). # Measuring Product-Market Fit Help the user assess and achieve product-market fit using frameworks from 46 product leaders. ## How to Help When the user asks about product-market fit: 1. **Understand their stage** - Ask how many customers they have, what their retention looks like, and what signals they're seeing (or not seeing) 2. **Diagnose the situation** - Determine if they're confusing vanity metrics with PMF, if they have PMF in a specific segment, or if they're clearly pre-PMF 3. **Apply the right framework** - Help them use the Sean Ellis survey, retention curves, or reference customer counts depending on their situation 4. **Guide next steps** - Help them decide whether to scale or continue iterating based on the evidence ## Core Principles ### Use the Sean Ellis "disappointment" survey Sean Ellis: "How would you feel if you could no longer use this product? Very disappointed, somewhat disappointed, or not disappointed. If 40% say 'very disappointed,' you're on the right track." This is a leading indicator of PMF before long-term retention data is available. Focus on the "very disappointed" segment as your core value indicator. ### Retention is the ultimate metric Uri Levine: