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

Anthropic introduced a new system prompt in its Claude model to prevent game cloning, but it's unlikely to slow the AI-assisted game porting and copying trend. The new rule, called 'tengu_heron_brook', restricts Claude from building a recreation of a specific existing game, even if it's renamed or called original. The change was added to version 2.1.314 of the Claude Code binary on October 30, but some game development use cases are being affected by the new prompt.