Building Cutline. We’ve identified a ‘Vibecoding Cliff’ where AI coding agents start to fail as production constraints (security, stability, latency) increase. Cutline is a technical product manager that helps vibecoders build with security, stability, and scalability from the start. Cutline helps you survive the MVP cliff by dynamically injecting security, stability, and scalability requirements into your coding agent, avoiding ‘vibecoding whack-a-mole’ sessions where the coding agent drops a previous requirement to satisfy the new one. We built Cutline after frustration with off-the-shelf AI for product management: sycophantic guidance and declining efficiency in highly constrained situations that call for ruthless prioritization.