You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Cloud SessionsArea: what it touches
In DevelopmentKind: in v2.1.242,
In DevelopmentSection of the release
What
When another client is attached to the same cloud session, its messages are not passed through as-is: content blocks this client cannot show become a placeholder and tool calls are dropped entirely.
Details
The number of each is reported as peer_content_omitted and peer_tool_use_omitted in the end-of-run event.
Frame types the client does not recognise are dropped with a warning, except for a known list of service events including synced_file_changed, mcp_auth_required and heartbeat_probe, which are dropped silently.
Evidence
[unsupported content from another client omitted]
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
