Anthropic added rules to Claude Code's prompt on Opus 5.5 to prevent recreating specific existing games, citing intellectual property concerns. A technical staff member, Addy Osmani, confirmed the change on X, stating 'using Claude to infringe IP is against our usage policy.'
The update follows reports of AI-driven game remakes causing industry concerns. Users on GitHub noted restrictions on creating board game modules and personal game copies. Developers have expressed fears about AI clones undermining original work, with some delaying public tests to avoid misuse.