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A contract specifies 95% resolution accuracy and a $0.50 cost-per-resolution cap for an agent. Design the eval suite and the go/no-go.

Two hard numbers in the contract: 95% accuracy and $0.50 per resolution. The job is an eval and rollout system that proves both hold on real traffic before you scale, with rollback triggers wired to the same numbers.

Updated Aug 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

Two hard numbers in the contract: 95% accuracy and $0.50 per resolution. The job is an eval and rollout system that proves both hold on real traffic before you scale, with rollback triggers wired to the same numbers.

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FEDITOR'S NOTE

The senior signal is tying every eval, gate, and rollback to the two contractual numbers, and refusing to treat offline goldens as proof of production behavior. Strong candidates separate offline goldens (regression gate) from online metrics (the real SLA), define resolution measurably (not 'the model said it solved it'), track cost per resolution including retries and escalations, and gate expansion on a canary holding both numbers with statistical confidence. Watch for candidates who declare victory on offline accuracy or who measure cost per call instead of per resolution.

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