GoKawiilAnthropic adds Claude Code prompt barring recreations of specific existing video games
Anthropic quietly inserted a new system-prompt rule into Claude Code, first spotted around October 27 and confirmed present in version 2.1.314 released October 30, instructing the model not to rebuild a specific existing game even if renamed. Anthropic engineer Addy Osmani confirmed the company added 'two sentences' to steer Claude Opus 5.5 away from recreating someone else's game, citing its usage policy against IP infringement, while still permitting original or genre-based games built from a user's own assets.