{"type":"post","id":"anthropic-confirms-claude-code-prompt-rule-telling-claude-aa103c","slug":"anthropic-confirms-claude-code-prompt-rule-telling-claude-aa103c","title":"Anthropic confirms Claude Code prompt rule telling Claude not to recreate specific existing video games","description":"Anthropic has confirmed that it added prompt guidance to Claude Code on Opus 5.5 telling it not to recreate a specific existing video game.","retrieval_nugget":"Anthropic has confirmed that it added prompt guidance to Claude Code on Opus 5.5 telling it not to recreate a specific existing video game. Original games, genre games, and games based on a user’s own designs and assets are intended to remain supported. For builders, the episode is a reminder that provider policy can alter an agent’s practical task boundary.","published_at":"2026-10-31","updated_at":"2026-10-31","record_date":"2026-10-31","date_kind":"published_at","topics":["claude","anthropic","claude-code"],"entities":["Anthropic","Claude Code","Opus 5.5","Addy Osmani"],"related_patterns":["agent-security-moves-to-runtime-boundaries"],"novelty_label":"same_event","what_changed":"Same event as Claude Code receives server-side 'tengu_heron_brook' instruction against recreating existing games; Anthropic confirms","prior_refs":["memory:a69d13e7-9b32-89bb-adce-215140a8cd07","memory:41d1f419-2ebf-8fd8-aaa8-a648a8c06a53"],"source_url":"https://www.gamedeveloper.com/programming/anthropic-appears-to-have-ordered-ai-tool-claude-to-stop-remaking-video-games","source_urls":["https://www.gamedeveloper.com/programming/anthropic-appears-to-have-ordered-ai-tool-claude-to-stop-remaking-video-games"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:anthropic-confirms-claude-code-prompt-rule-telling-claude-aa103c","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/anthropic-confirms-claude-code-prompt-rule-telling-claude-aa103c/","markdown":"https://newruntime.com/posts/anthropic-confirms-claude-code-prompt-rule-telling-claude-aa103c.md","json":"https://newruntime.com/posts/anthropic-confirms-claude-code-prompt-rule-telling-claude-aa103c.json"},"next_reads":[{"type":"topic","path":"/topics/claude/","url":"https://newruntime.com/topics/claude/","title":"Claude","reason":"Explore the claude topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude.md","json_url":"https://newruntime.com/topics/claude.json"},{"type":"topic","path":"/topics/anthropic/","url":"https://newruntime.com/topics/anthropic/","title":"Anthropic","reason":"Explore the anthropic topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/anthropic.md","json_url":"https://newruntime.com/topics/anthropic.json"},{"type":"topic","path":"/topics/claude-code/","url":"https://newruntime.com/topics/claude-code/","title":"Claude Code","reason":"Explore the claude-code topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/claude-code.md","json_url":"https://newruntime.com/topics/claude-code.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}