Claude-thermos - Keeps your Claude session cache warm

Show HN: Claude-thermos – keeps your Claude session warm for you

Claude-thermos is a smart tool designed to prevent costly prompt cache expirations during long Claude Code sessions. When subagents run longer than five minutes, the main agent's cache often times out, forcing expensive re-encoding of conversation history. This utility acts as a local reverse proxy, automatically sending lightweight 'warm' requests to keep the cache active in the background. By simply wrapping your standard CLI commands, it saves developers roughly 20% on their API bills by ensuring conversation history is read cheaply rather than rewritten at full cost.