Anthropic Adds Tengu Heron Brook Rule To Claude Opus 5.5

Anthropic just locked down Claude Opus 5.5 to block users from copying real video games. A secret system flag named tengu heron brook went live on October twenty seventh. It stops the AI from recreating any specific existing game title. You can still build totally original games or work within broad genres. But the guardrails are catching way more than just video games now. Users report Claude is refusing to read unlicensed web novel translations and coding books. One frustrated fan even called the platform a theft machine after getting blocked. Anthropic appears to be reversing course to dodge copyright heat.