I read about Full Context Engineering and added structured output, hierarchical layout, role definition, and few-shot examples to my RAG pipeline. Sonnet got 12% better. Haiku got 14% worse. Here is what the numbers actually mean for your AI architecture in 2026.
I Stacked 4 More Context Layers on Top of RAG. Sonnet Got 12% Better. Haiku Got 14% Worse.