[hughw]

Where can i learn about concepts like prompt cache misses? I don't have a mental model how that interacts with my context of 1M or 400k tokens... I can cargo cult follow instructions of course but help us understand if you can so we can intelligently adapt our behavior. Thanks.

[bcherny]

The docs are a good place to start: https://platform.claude.com/docs/en/build-with-claude/prompt...

[snthpy]

Thanks. Just noting that those docs say the cache duration is 5 min and not 1 hour as stated in sibling comment:

> By default, the cache has a 5-minute lifetime. The cache is refreshed for no additional cost each time the cached content is used. > > If you find that 5 minutes is too short, Anthropic also offers a 1-hour cache duration at additional cost.

[yoaviram]

Apparently Anthropic downgraded cache TTL to 5 min without telling anyone. My biggest issue with the recent issues with Claude Code is the lack transparency, although it looks like even Boris doesn't know about one: https://news.ycombinator.com/item?id=47736476

[hughw]

And why does /clear help things? Doesn't that wipe out the history of that session? Jeez.