Cachebeat – keep your Claude Code prompt cache warm while a session is idle

A Reddit user highlights an issue with Claude Code's prompt cache: if a session remains idle beyond the cache window, the subsequent input triggers a full, uncached re-reading of the entire conversation. This can lead to significant token consumption, potentially hundreds of thousands, incurring full costs and impacting Pro/Max users' 5-hour and weekly limits, not just API billing. The user is curious if others have experienced this problem.