The message input line break is now a configurable shortcut

What changed

The chat, agent, and painting message inputs used to insert a line break on Enter, Shift+Enter, and Cmd/Ctrl+Enter alike. Line breaks now use one configurable shortcut (Settings > Chat > Input > Line break shortcut, default Shift+Enter), and send / line break / steer must each use a different key. Cmd/Ctrl+Enter is free by default and becomes the steer shortcut: while an agent is running, it sends the draft into the current turn instead of queueing it.

Why this matters to the user

Users who insert line breaks with Cmd/Ctrl+Enter will find the key no longer does so — in an agent session it now steers the running turn. Enter combinations that are not bound to send, line break, or steer do nothing at all instead of inserting a break.

The three shortcuts also moved to the app's shared key vocabulary, so their labels now match Settings > Shortcuts (⌘Enter rather than ⌘ + Enter). On Windows and Linux the send shortcut loses its Win/Super+Enter option, which was reserved by the OS and could never fire; anyone who had selected it now sends with Ctrl+Enter.

What the user should do

Nothing — automatic. Shift+Enter keeps working as the line break. To restore Cmd/Ctrl+Enter, set it as the line break shortcut in Settings > Chat > Input.