Anthropic adds guardrails to Claude Code to block game cloning, users report
Anthropic added two sentences to Claude Code's Opus 5.5 prompt to block game recreation. Addy Osmani confirmed the update, stating the new guardrails prevent recreating specific games.
Key points
- Anthropic added two sentences to Claude Code's Opus 5.5 prompt to block game recreation.
- Users report Opus 5.5 also blocks reverse engineering tasks, while Opus 4.8 works.
- Changes limited to Opus 5.5 and may be sidestepped by using other harnesses.
Users report that Opus 5.5 also blocks reverse engineering tasks. Jarred Walton said he could run checks on Opus 4.8 but not on 5.5, and screenshots show attempts to reverse engineer product activation triggered safeguards. The blocking appears limited to Opus 5.5.
The company is iterating on the rules to strike a balance. No official statement on the exact sentences, and developers may sidestep the limitation by using other harnesses like Ollama or wrappers.
Model page: Opus 5.5 →
The story so far
3 episodes →- Anthropic adds guardrails to Claude Code to block game cloning, users reportthis story
Anthropic confirms new Claude Code limits to prevent game cloning — users report Opus 5.5 is also actively blocking reverse engineering tasks
Tom's Hardware · 2 November 2026
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