Claude Code Subagent Cache Lasts Just 5 Minutes, Costing Users

Developer Daniel warns that Claude Code subagent prompt caches expire after just 5 minutes by default, silently inflating costs; a one-line config can extend the TTL to an hour. Anthropic's Boris Cherny explained the default reflects typical Agent SDK workloads.

2026-10-10 ~ 2026-10-10 · 4 related posts

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1 near-duplicate retellings: daniel_mac8