Freeze Prefixes to Hit the Cache
thisdudelikesAI · x · 2026-07-16
This advice suggests pinning system prompts and stable project context at the very beginning, keeping them exactly the same across turns, while placing variable step information further down.
The goal isn't aesthetics, but to make prompt caching easier to hit, thereby reducing the cost of repetitive calls.
Related event: Anthropic shifts agent engineering toward context engineering(5 posts)→
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