AgentWorkforce/burn analyze-v0.18.0

@relayburn/analyze@0.18.0

on GitHub

[0.18.0] - 2026-04-26

Fixed

• Reasoning-token pricing semantics (#32). Two correctness bugs that distorted reported spend whenever reasoning tokens were involved:
  • Codex usage.reasoning was double-billed at the output rate even though Codex's output_tokens already includes reasoning. burn now treats Codex turns as included_in_output and bills output only. On a 10-turn Codex sample (660k input / 53k output / 29k reasoning / 5.6M cacheRead), this drops the reported cost from $4.282607 to $3.846557 — about 11% off the Codex slice.
  • cost.reasoning from the models.dev snapshot was discarded during flatten(), so any model with a distinct reasoning tariff (e.g. Alibaba Qwen reasoning models) couldn't be priced correctly. The flattener now preserves reasoning and tags the entry reasoningMode: 'separate'; costForUsage honors the distinct tariff.
• Waste-attribution session totals now honor the same reasoning-mode semantics as costForTurn. attributeWaste previously had a private costForTurnLocal that unconditionally billed reasoning at the output rate, which double-billed Codex turns and ignored separate reasoning tariffs in sessionGrand / grandCost / unattributedCost. It now delegates to costForTurn, so waste totals match cost.ts for any session involving reasoning tokens (Devin review on #73).

Added

• ModelCost.reasoningMode: 'included_in_output' | 'separate' | 'same_as_output' and optional reasoning per-million tariff. ReasoningMode and CostForUsageOptions are exported.
• costForUsage(usage, model, pricing, { reasoningMode }) accepts an explicit override. costForTurn infers included_in_output for source: 'codex' automatically.
• flatten is now exported so callers can build PricingTables from in-memory models.dev payloads.