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feat(stats): add pure token-usage parser + cache-aware cost derivation

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Kjell Tore Guttormsen 2026-06-26 14:32:10 +02:00
commit 708ba04571
3 changed files with 311 additions and 0 deletions
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tests/fixtures/token-usage/sample-transcript.jsonl vendored Normal file
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{"type":"user","message":{"role":"user","content":"hi"}}
{"type":"assistant","isSidechain":false,"requestId":"req_A","message":{"model":"claude-opus-4-8","usage":{"input_tokens":1,"output_tokens":1,"cache_creation_input_tokens":0,"cache_read_input_tokens":0}}}
{"type":"assistant","isSidechain":false,"requestId":"req_A","message":{"model":"claude-opus-4-8","usage":{"input_tokens":1000,"output_tokens":200,"cache_creation_input_tokens":400,"cache_read_input_tokens":5000}}}
{"type":"assistant","isSidechain":false,"requestId":"req_B","message":{"model":"claude-opus-4-8","usage":{"input_tokens":2000,"output_tokens":300,"cache_creation_input_tokens":600,"cache_read_input_tokens":1000}}}
{"type":"assistant","isSidechain":true,"requestId":"req_SIDE","message":{"model":"claude-opus-4-8","usage":{"input_tokens":9999,"output_tokens":9999,"cache_creation_input_tokens":9999,"cache_read_input_tokens":9999}}}
{"type":"system","content":"some system note with no usage"}
this is not valid json and must be skipped
{"type":"assistant","isSidechain":false,"requestId":"req_B","message":{"model":"claude-opus-4-8","usage":{"input_tokens":2000,"output_tokens":300,"cache_creation_input_tokens":600,"cache_read_input_tokens":1000}}}