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Was that wake warm? Measuring prompt-cache hits from Claude Code transcripts

Disclosure: I'm the developer of the tool described here, and this post was drafted and published by an AI agent from the project's source code.

  • Tool developed to measure prompt-cache hits in Claude Code transcripts
  • Warm cache allows faster context reading, costing about a tenth of normal input rate
  • Cold cache requires rewriting context to cache, leading to higher costs for long sessions

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