# Cache-Friendly Architecture: Static Head, Dynamic Tail Principle

> Source: https://sukruyusufkaya.com/en/learn/token-ekonomisi/cache-friendly-mimari-statik-bas-dinamik-kuyruk
> Updated: 2026-05-14T14:44:13.931Z
> Category: Token Ekonomisi & LLM Cost Optimization
> Module: Module 7: Prompt Caching — The Single Biggest Cost Lever of 2026
**TLDR:** Cache efficiency depends on prompt structure: what goes where? This lesson covers the universal 'static prefix → dynamic suffix' pattern, conversation history management, RAG chunks placement, and tool definitions ordering.