IEatCodeDaily e7dd72a8d7 fix(usage): read Responses-shape cached_tokens in extractUsageFromResponse ...

Non-streaming codex traffic recorded cached_tokens: 0 even when upstream
prompt caching worked. The Claude-format branch (which OpenAI Responses
usage also matches) never read input_tokens_details, and the OpenAI
branch ignored a top-level flat cached_tokens. Read both in both
branches; Responses prompts are cache-inclusive so canonicalizeUsage
passes the value through without folding. 5 new regression tests.

2026-09-03 09:48:19 +07:00

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