Why architecture matters here

Verifiers fail on miscalibration + cost blowup. Architecture matters because check + retry + fallback compose.

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The architecture: every piece explained

The top strip is core. Model output. Verifier check. Verifier score. Threshold.

The middle row is control. Calibration. Reject-and-retry. Fallback. Cost + latency.

The lower rows are practice. Domain-specific. Metrics. Ops — governance + audit + evolution.

Verifier — post-hoc check + calibration + reject-and-retry + reliabilitytrust but verify LLM outputModel outputanswerVerifier checkrules / model / toolVerifier scoreconfidenceThresholdaccept / retryCalibrationalign verifier to truthReject-and-retrywith feedbackFallbacksmaller model or defaultCost + latencyverify costsDomain-specificcode / math / medicalMetricsaccept rate + hit rateOps — governance + audit + evolutioncalibrateretryfallbackbudgetspecializemeasuremeasureoperateoperate
Verifier pipeline: check + score + retry.
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End-to-end flow

End-to-end: code gen output. Verifier runs unit tests. Fail → retry with error as feedback. Success → return. Metrics show 92% accept + 6% fallback + 2% hard fail.