Use this skill whenever the user wants to score customer health, predict churn risk, identify expansion opportunities, prepare a QBR, or analyze a customer portfolio. Trigger phrases: 'customer health score,' 'churn risk,' 'at-risk accounts,' 'expansion opportunity,' 'upsell analysis,' 'QBR prep,' 'renewal analysis,' 'customer portfolio review,' 'who's about to churn,' 'where's the growth in our base.' Also use when the user pastes customer data and asks for an analysis. NOT for pre-sales workflows — use cold-outreach or rfp-engineer. NOT for product strategy — different skill.