Claude’s new rules against game cloning won’t stop the AI copying boom

Anthropic added a system prompt rule to Claude Code, reportedly around October 27 and verified in version 2.1.314 released October 30, instructing the model to build original games but not recreate specific existing ones even if renamed. XDA reported the "tengu_heron_brook" rule had other uses in earlier versions and that Claude Opus 5.5 appeared to carry its own separate instructions restricting game recreations. The article argues the change may shield Anthropic from some liability but is unlikely to slow the broader wave of AI-assisted game porting and copying.