Claude Code · Anthropic · Claude · GitHub · Ars Technica
Claude’s new rules against game cloning won’t stop the AI copying boom
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Last week, Anthropic introduced a new system prompt designed to stop its Claude models from re-creating specific, existing video games.
Key facts
- XDA later independently verified that the new rule appears in version 2.1.314 of the Claude Code binary, which was released on October 30
- A social media user and AI decompilation enthusiast going by the name “chasm” was among the first to note the prompt change late last week, saying a new rule seemed to be added to the Claude Code
- The team added two sentences to Claude Code’s prompt on Opus 5.5 to steer it away from recreating someone else’s specific game because using Claude to infringe IP is against their usage policy
- As Osmani noted in confirming the new anti-game copying prompt, “Using Claude to infringe IP is against our usage policy”—a policy that’s surely in place to protect the company legally
Summary
A social media user and AI decompilation enthusiast going by the name “chasm” was among the first to note the prompt change late last week, saying a new rule seemed to be added to the Claude Code prompt on or around October 27. Do build original games, games in a genre, and games from the user’s own designs and assets. XDA later independently verified that the new rule appears in version 2.1.314 of the Claude Code binary, which was released on October 30. Following chasm’s initial report, Anthropic software engineer Addy Osmani confirmed on social media that the company had “added two sentences to Claude Code’s prompt on Opus 5.5 to steer it away from recreating someone else’s specific game because using Claude to infringe IP is against our usage policy.”