Beyond the Model: Building the AI Harness

Short summary

The author argues that the real engineering in production AI systems happens in the 'AI Harness' — the surrounding infrastructure of model selection, orchestration, and observability — rather than in the LLM itself. Two teams using the same foundation model can get vastly different results depending on the system built around it. The post predicts AI engineering will increasingly resemble software architecture rather than prompt engineering.

• •The 'AI Harness' — orchestration, model selection, observability — is the real engineering layer for production AI
• •Same foundation models yield different results based on surrounding system quality
• •AI engineering is shifting from prompt engineering toward software architecture

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