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What is system-prompt leaking / prompt extraction, and how do you defend against it?

Attackers coax models into dumping the hidden system prompt, exposing IP, business logic, or worse, embedded secrets. The signal is treating the prompt as non-secret and defending in layers, not betting on 'never reveal your instructions.'

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Attackers coax models into dumping the hidden system prompt, exposing IP, business logic, or worse, embedded secrets. The signal is treating the prompt as non-secret and defending in layers, not betting on 'never reveal your instructions.'

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