Anthropic quietly added two instructions to the Opus 5.5 model to prevent Claude Code from recreating an existing video game, even under a different name. The measure, released with Claude Code version 2.1.314 on October 30, was absent from the changelog and was confirmed by Addy Osmani after being discovered by an X user. Independent studios have nevertheless reported refusals affecting legitimate projects, including custom digital wargame modules, because the interpretation of the natural-language instruction varies from case to case. Anthropic justified the restriction by opposing the use of AI to infringe intellectual property, while the growth of AI-generated clones is forcing the industry to reconsider the boundaries between homage and counterfeiting.
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