Anthropic adds rule barring Claude from cloning existing games
What happened
On 30 October 2026, Anthropic released Claude Code 2.1.314, which adds a system-prompt rule under the name "tengu_heron_brook" barring Claude from recreating specific existing games, even if renamed or claimed as original; Claude Opus 5.5 has a separate restriction. Ars Technica reported on 3 November that the move may help Anthropic avoid some liability but is unlikely to slow the recent wave of AI game porting and copying. The Verge reported the same day that Anthropic's Addy Osmani confirmed the company added two sentences to Claude Code's prompt on Opus 5.5 to steer it away from reproducing others' specific games, on the grounds that using Claude to infringe intellectual property violates its usage policy; original games, genre games and games based on users' own designs and assets can still be generated.
Written by AI from the reports · updated 1 h ago
Timeline
Follow the reports to see the event from each side.
- The Verge · AIAnthropic clamps down on Claude’s AI video game clones
Anthropic has updated Claude Code's system prompt to prevent the AI tool from being used to recreate existing video games, as reported by Tom's Hardware.
- Ars Technica · AIClaude’s new rules against game cloning won’t stop the AI copying boom
The tsunami of imitators is way bigger than any one model maker can stem.
Heat of this event
Not enough continuous observations yet to draw a trend.