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Claude's System Prompts: AI Behavioral Engineering Decoded

Claude's System Prompts: AI Behavioral Engineering Decoded

Discover Claude 4's system prompt secrets and AI behavioral engineering patterns. Learn safety boundaries, refusal protocols, and design strategies behind top AI products.

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Meng Li
Jun 23, 2025
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Claude's System Prompts: AI Behavioral Engineering Decoded
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Why Claude 4 Shines So Brilliantly?

Why does your mirror site always feel like it's missing something compared to the official website?

Actually, all of this relates to system prompts. Only after Claude 4's system prompts were exposed could we glimpse the secret rules behind this intelligent brain.

After reading these, you'll discover that such prompts are no longer simple Prompt Engineering, but rather a systematic "AI Behavioral Engineering"!

Safety Boundaries

Claude's approach is textbook-level, with two core strategies: drawing clear red lines and standard refusal.

Claude's system clearly states:

  • Strictly prohibit weapon manufacturing, malware, and extremist speech

  • Copyright blocking: quoting copyrighted text over 15 words requires saying "no."

Many people use platforms like Coze or PPLX to find software activation codes, but Claude will never give you such opportunities.

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