LLM Cost-Optimization Audit — $49
You added prompt caching and your bill went up. Caching a prefix you reuse less often than the TTL window is a net loss, not a no-op. Profiles first, then audits the levers that actually move an inference bill, each saving quoted with its precondition.
This is a preview. The full skill (method, Iron Rules, dated snapshots, worked examples) is available on Agensi: agensi.io/skills/llm-cost-optimization-audit