Anthropic changed Claude Code's instructions with two added sentences meant to stop the Opus 5.5 model from copying existing video games. Developers also say the filter hits projects involving crash dump analysis and anti-cheat tools, along with debugging their own work. Chasm, an X user, first noticed the instruction on October 27. Addy Osmani, a technical staff member at Anthropic, confirmed it on X on October 30, citing a policy against intellectual property infringement. Original games, titles within established genres, and work drawn from materials belonging to a user stay permitted, yet reproducing one particular existing title is prohibited even when renamed. Osmani said further tuning is planned and asked developers to report refusals. Anthropic has not explained how it decides who owns a project.
Why it matters: The restriction shows how AI labs balance intellectual property protection against the friction it causes for developers building legitimate projects.
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