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A developer adds {"role": "system", "content": "You are a pirate"} as the first item in the messages array and is surprised the API rejects it. How should a system prompt be supplied in the Messages API?
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beginner 25 min
System Prompts & Messages
Based on Anthropic Claude documentation and the CCA-F exam blueprint. Updated August 2026.
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Your agentic system uses a coordinator that passes subagent outputs directly into the next subagent's context. Output quality degrades after 5 hops. What is the most likely cause?
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