Analyze cohorts, cancellations, renewals, and expansion for a bootstrapped B2B SaaS so paying customers stay and grow. Use this when customers cancel, don't renew, go quiet after buying, or when the founder asks "why are we churning," "is our retention healthy," or "how do we expand accounts." Do not use it to get new users to first value (founder-activation), to change packaging or price (founder-pricing), or to find new customers (founder-growth) — retention and acquisition are separate problems with separate causes, and this skill never answers churn with "get more customers."
