Two new attachment/message types, "instructions" and "prompt_snapshot", were added to several allowlists/exclusion-lists used when building the conversation for the model and when computing embeddings, alongside existing types like "session_context" and "date". Both are filtered out of the message list used for similarity/history search.
New "instructions" and "prompt_snapshot" attachment/system-prompt-section types
Two new internal message types for instructions and prompt snapshots are excluded from history search.
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.252,
Internal ChangesSection of the release