Skip to content
K = 0.731Subscribe

Anthropic adds Claude Code rule against recreating specific existing games

2 reports 2 reporting sources Updated 9 hours ago

Understand the event

AI overview

Anthropic added two sentences to Claude Code’s system prompt on Opus 5.5 to steer it away from recreating a specific existing game, even if the game is renamed or called original. XDA verified the rule in Claude Code version 2.1.314, released October 30. Anthropic’s Addy Osmani said the restriction reflects the company’s policy against using Claude to infringe intellectual property. Osmani said original games, games in a genre, and games made from users’ own designs and assets are meant to remain supported.

Generated by AI from reports · Updated 3 hours ago

Latest development11/3 02:56 (UTC+8)
Anthropic Updates Claude Code Prompt to Block Recreating Existing GamesThe Verge · AI

Read next

More changes in today’s briefingOpenAI’s updated Model Spec explained through its five core values

Report timeline

Follow the reports to explore different sides of the event.

11/3
  1. The Verge · AI
    Anthropic Updates Claude Code Prompt to Block Recreating Existing Games

    Anthropic updated Claude Code's system prompt to steer the tool away from recreating specific existing video games, The Verge reported. Addy Osmani said the company added two sentences to the prompt on Opus 5.5 because using Claude to infringe IP violates its usage policy. Original games, genre games, and games built from users' own designs and assets are meant to keep working, Osmani said.

  2. Ars Technica · AI
    Anthropic Adds Claude Rules Against Recreating Existing Games

    Anthropic introduced a new system prompt meant to stop Claude models from re-creating specific existing video games, though it is unlikely to slow the broader wave of AI-assisted game porting and copying. The rule, found in a json file named "tengu_heron_brook," tells Claude to build original games but not recreate a specific existing game even if renamed. XDA verified it in Claude Code version 2.1.314, released October 30.

Keep up with AI, one email a day

Model releases, price changes and compute developments, with original sources. Free, confirmed by email, and easy to unsubscribe. Read a past issue

Event heat trend

Current within comparable coverage
16
Peak within comparable coverage
1711/3 09:00 (UTC+8)
24-hour change
–

Trends compare the same continuously observed participants, which may cover fewer sources than current heat. Point or click to inspect hourly heat, or use left and right arrow keys.