Claude-thermos Tool for Maintaining Prompt Cache Warmth
July 23, 2026
Claude-thermos is a utility designed to prevent Claude Code prompt cache expiration during subagent waits. By automatically running background warming cycles, it prevents re-encoding entire conversations at write rates, potentially reducing costs by 20% on long sessions.
HOW THIS AFFECTS YOU
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builderYou can reduce latency and API costs by keeping your Claude sessions from hitting the 5-minute TTL limit.
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founderYou can optimize the unit economics of agentic workflows using Claude Code.