You'll notice
Toggling fast mode now notifies the rest of the app of the settings change and can trigger a follow-up model swap
What
When fast mode is turned on or off, Claude Code now sends a settings-changed notification so other parts of the app are aware. Additionally, if changing fast mode also causes the active model to change, that new model selection now triggers a follow-up action automatically instead of just being applied silently.
Why
This keeps the rest of the interface in sync when fast mode changes, and ensures a model swap triggered by fast mode is properly followed through rather than left half-applied.