Proof
Three problems where the symptom was clear and the cause was not. Each one is written outcome first, with the technique underneath.
A production backend had stopped shipping. The pipeline reported success on every run, so nothing looked wrong until the deployed code turned out to be older than the commits behind it.
66% Smaller worker bundle
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An in-app AI assistant was giving weak answers and consuming credits fast. Prompt tuning had not fixed it, because the problem was not in the prompt.
~80% Fewer AI credits per request
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A subscription-commerce operation needed its lifecycle, imports, notifications and integrations to live somewhere deliberate rather than spread across whichever platform happened to own each step.
One auditable integration layer owning subscription lifecycle state, instead of five systems each holding part of it.
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