A user reports that Claude Code received a new game-generation rule around October 27, delivered from Anthropic’s servers under the flag “tengu_heron_brook.” The rule permits creating original games, games that belong to a genre, and games based on a user’s own designs and assets. It prohibits recreating a particular existing game, even if the recreation is renamed or presented as original. The user says there is no setting to disable the restriction.
The concern is that this could limit more than direct game clones: the post asks whether rewrites, modding, and related projects will also be affected, though it does not establish how Anthropic applies the rule to those cases. The distinction it describes is between using a broad genre or original materials as a starting point and reproducing a specific game. The post drew substantial attention, with roughly 747,000 views, and replies showed mixed reactions. One commenter predicted that modified open-source models would gain ground, while another mocked the prospect of AI assistants accumulating increasingly restrictive instructions.
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