releases.shpreview

Cache diagnostics launched in public beta

Cache diagnostics is now available in public beta. Pass diagnostics.previous_message_id on a Messages request and the API reports a cache_miss_reason explaining where the prompt cache prefix diverged from the previous turn. Include the cache-diagnosis-2026-04-07 beta header in your requests.

Fetched May 19, 2026

Cache diagnostics launched in public beta — Claude Platform — releases.sh