# Treat the agent contract as versioned infrastructure

Production agent behavior comes from a versioned contract spanning instructions, tools, schemas, context assembly, model selection, and release gates.

- Published: 2026-04-16
- Category: platform-engineering
- Tags: claude, infrastructure, llm, production, prompt-engineering, system-prompt
- HTML: https://harnez.ai/posts/system-prompt-as-infrastructure/

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