Prompt-cache telemetry now records why a cache miss happened. The tracking data gains last_miss_cause (with tools_added, tools_removed, and system_char_delta detail) and miss_causes, backed by a lookup table mapping internal cause codes such as system_prompt_changed, betas_changed, and ttl_expired_5m to human-readable strings.
Prompt-cache miss telemetry now records a cause
Prompt-cache miss telemetry now records the specific reason for the miss.
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.260,
Internal ChangesSection of the release