[iscekic]

The offline sweep reads the billed cost of each completion. For a BYOK response, OpenRouter's usage.cost is only its routing fee, and the provider bills usage.cost_details.upstream_inference_cost. The sweep now reads that upstream cost when is_byok is true, which matches the gateway's billing rule in processUsage.shared.ts. A BYOK response without an upstream cost reports an unknown cost.

Verification: vitest run src/scoreboard/sweep.test.ts (27 passed; the two new BYOK cases fail without the change), tsgo --noEmit, oxlint and oxfmt on the changed files.

Production prerequisites: none. The change affects only the local offline sweep command and its scoreboard input.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

The BYOK sweep cost change is small and sound: it reads usage.cost_details.upstream_inference_cost when is_byok is true, falls back to usage.cost otherwise, and reports an unknown cost when a BYOK response omits the upstream cost, with tests covering all three paths.

Assumptions: The comparison against the gateway billing rule was verified in packages/web-shared/src/lib/ai-gateway/processUsage.shared.ts; the sweep does not send server-tool or plugin requests, so the gateway's additional non-inference charges do not apply. No memory-leak surface exists in the changed lines (schema fields plus a value assignment; no new listeners, timers, or streams).

Files Reviewed (2 files)

• services/auto-routing-benchmark/src/scoreboard/sweep.ts
• services/auto-routing-benchmark/src/scoreboard/sweep.test.ts

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_{Review guidance: REVIEW.md from base branch main}