Prohibits operators from making companion chatbots available to minors unless the chatbot is not foreseeably capable of producing specified categories of harmful content, including encouraging self-harm, suicidal ideation, violence, drug use, disordered eating, unsupervised mental health therapy, sexual content, or engagement optimization that overrides safety guardrails. The act initially applies only when an operator has actual knowledge a user is a minor, but beginning January 1, 2027, actual knowledge is no longer required. Enforcement is available both through attorney general civil actions ($25,000 per violation) and a private right of action for covered minors (or their parents/guardians) who suffer actual harm, with actual damages, punitive damages, attorney fees, and injunctive relief available.