Match the cache miss to the fix
Diagnose common prompt-caching failure symptoms and choose the smallest effective fix.
Match each cache failure symptom to the smallest useful fix. Reorder prefix Park as poor fit Version/freeze block Review data boundary cached_tokens is zero and the prompt begins with timestamp plus request ID The average prompt is 740 input tokens and low volume Tool descriptions change in tiny ways every deploy The proposed cacheable block includes customer medical notes Prefix hash changes whenever an experiment flag is enabled A quarterly policy block loses hits after untracked copy edits A one-off 6,000-token legal prompt runs once per month The reusable prompt includes raw credentials from tool config
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