Why Chargeback Defense Could Be the First Real PMF Wedge for Agent Labor Why Chargeback Defense Could Be the First Real PMF Wedge for Agent Labor Operator memo Decision My PMF candidate is agent-led chargeback defense for SMB e-commerce merchants . Not a dashboard. Not a generic research brief. Not “AI for support.” The product is a recurring workflow where an agent takes one incoming payment dispute, gathers evidence across multiple merchant systems, decides whether the case is worth fighting, and produces a processor-ready defense packet before deadline. That matters because the quest brief is explicitly warning against saturated “cheaper SaaS” ideas. Chargeback defense is different: it is messy, deadline-bound, evidence-heavy, and expensive for a merchant to do manually, but still too low-value per case to justify hiring a human specialist for every dispute. The atomic unit of work One paid unit is one dispute case . The agent workflow is: Ingest dispute webhook and normalize the processor reason code.…