docs: clarify cache-ttl pruning window

2026-01-21 19:58:28 +00:00
parent c145a0d116
commit 6866cca6d7
2 changed files with 2 additions and 0 deletions
--- a/docs/concepts/session-pruning.md
+++ b/docs/concepts/session-pruning.md
@@ -13,6 +13,7 @@ Session pruning trims **old tool results** from the in-memory context right befo
 - Only affects the messages sent to the model for that request.
 - Only active for Anthropic API calls (and OpenRouter Anthropic models).
 - For best results, match `ttl` to your model `cacheControlTtl`.
+ - After a prune, the TTL window resets so subsequent requests keep cache until `ttl` expires again.

 ## What can be pruned
 - Only `toolResult` messages.