Tugboat now treats concise communication as a core behavior, not a demo-only style choice.
- Deep work no longer implies long replies.
- Progress updates default to change, meaning, and next action.
- Details expand when risk, uncertainty, permission, or a user decision requires them.
- E16 adds regression coverage for communication overload.
- English and Traditional Chinese demos now reflect the concise default.
Safety invariant: brevity never hides setbacks, material evidence, uncertainty, or permission boundaries.