This is a comprehensive framework for measuring what matters in your product. It walks you through choosing a North Star metric, tracking acquisition through retention funnels, calculating LTV:CAC ratios, and running cohort analyses. The segmentation patterns are especially practical, breaking users into power users, casuals, and at-risk groups with specific actions for each. It's opinionated about benchmarks (40%+ DAU/MAU is excellent, sub-20% needs work) and includes real examples from Slack, Airbnb, and others. Best used when you need to instrument analytics properly or diagnose why growth has stalled, not for basic traffic reporting.
npx skills add https://github.com/daffy0208/ai-dev-standards --skill product-analyst