Only if you set `ENABLE_PROMPT_CACHING_1H`, which was mentioned in the release notes for a recent Claude Code release but doesn't seem to be in the official docs.

That'd be awesome but it doesn't reflect what I see. Do you have a source for that? What I see is if take a quick break the session loses ~5% right at the start of the next prompt processing. (I'm currently on max 5x)