Explain why moving stable runbook material before volatile ticket details improves cacheability and downstream routing.
A support runbook assistant repeats expensive context but rarely earns cached-input savings. Before: volatile ticket facts lead the prompt. After: stable runbook prefix, dynamic ticket suffix. The repeated runbook moved to the initial prefix, because prompt caching needs exact prefix matches before it can reduce fresh input cost. Ticket-specific facts moved to the end, because volatile content at the front makes every request look new to the cache. The output changed to a compact action checklist, because token economics rewards buying only the completion the engineer can act on. Routine runbook matches can now route to a cheaper model, while…
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