Two bugs made the Session numbers wildly inflated (~$300/122M when the real
figures were ~$46/57M):
1. No de-duplication. Claude Code copies prior history into a new transcript
file on every compaction/resume, so the same API turn appears in several
.jsonl files. Summing all lines counted each turn multiple times — ~2.7x
inflation today (a heavily-compacted session). De-dup by (messageId,
requestId), matching ccusage.
2. Wrong Opus pricing. Used the older $15/$75 in/out rates; claude-opus-4-x is
actually $5/$25 (cache-write $10, cache-read $0.50) — 3x too high. Rates
verified against ccusage/LiteLLM, which they now reproduce to 100%.
Verified end to end against a fresh ccusage run: total tokens, output tokens and
cost all match exactly (57,256,809 tok / $45.63). Daemon-only change; no firmware
reflash needed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
