obol-core 0.4.0

Read AI-agent transcripts (Claude Code, Codex, Pi) and estimate their USD cost.
Documentation
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{"info":{"id":"ses_15777484","directory":"/tmp/p"},"messages":[
  {"role":"user","parts":[{"type":"text","text":"hi"}]},
  {"role":"assistant","modelID":"gpt-5.5","providerID":"openai","cost":0,
   "tokens":{"input":7035,"output":12,"reasoning":0,"cache":{"read":0,"write":0}},
   "parts":[{"type":"step-finish","tokens":{"total":7047,"input":7035,"output":12,"reasoning":0,"cache":{"write":0,"read":0}},"cost":0}]},
  {"role":"assistant","modelID":"gpt-5.5","providerID":"openai",
   "parts":[{"type":"step-finish","tokens":{"input":100,"output":5,"reasoning":2,"cache":{"read":50,"write":7}}}]}
]}