Claude Code Guardrails
Anthropic's recent move to have Claude Code deny video game cloning and possibly reverse engineering efforts has come under heavy fire from the software development community. An Anthropic employee responded to a report on the matter with a direct statement confirming that the firm added guardrails to Claude Code to prevent game recreation.
Addy Osmani stated that Anthropic 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 intellectual property violates usage policies. He noted that work on original games is meant to continue, and the company is iterating on the rules to find the right balance.
We 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. Original games, genre games, and games built from your own designs and assets are meant to keep working. We'll continue to iterate to ensure we're striking the right balance. In the meantime, if Claude turns down something that's yours, send it my way.October 30, 2026
The added prompt instructions reportedly instruct the assistant to build original games and genre titles from user designs, while avoiding the recreation of specific existing games, even under a different name.
Reverse Engineering Restrictions
Users on GitHub and other platforms have reported that the AI assistant refuses to work on game development or reverse-engineering tasks when paired with the Opus 5.5 model. Developers suggest that switching to different harnesses or older models may bypass these limitations.
Software developers attempting to run checks on proprietary code noticed that requests began triggering safeguards, while switching to older model versions allowed development work to continue without interference.
Observers theorize that Anthropic implemented cybersecurity-related rules in Code alongside the video game content restrictions.
Requests to reverse engineer product activations have similarly triggered safeguards. Anthropic maintains a Cyber Verification Program that grants approved entities access to advanced frontier model cybersecurity capabilities.
