Output-Efficiency Internal-vs-External Prompt Gap

Description

Cultural gap surfaced by cchistory/Piebald and dbreunig/Harrison analysis: the system-prompt block for Anthropic employees emphasizes 'Output Efficiency' and understandability; the version external users see emphasizes 'IMPORTANT: Go straight to the point' and brevity. HN/Reddit threads argue this directly produced the thinking-depth regression documented in earlier rounds — internal prompts optimize for code quality; paying-user prompts optimize for speed.

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src-20260423-22e662f6932a