ARTICLEDEV.to AI·4/24/2026
An agent is only as good as the system engineering around it.
Anthropic's postmortem on Claude Code's quality drop revealed that the issue stemmed from orchestration, not the base model, highlighting the critical role of system engineering. The analysis divides AI agent quality into three layers—Model, Context, and Harness—concluding that overall performance is primarily defined by the engineering of the system around the model.
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