TurnSummary

Close a turn with one muted line: how long the agent worked, tokens used (against a budget when tokenBudget is set) and how many background tasks are still running. While background tasks run, the clock icon becomes a small loader. Labels are functions, so you can change wording and pluralization. MessageList renders it automatically for a { type: "turn-summary", durationMs, tokens?, tokenBudget?, backgroundTasks? } part. The line does not wrap, so keep labels short in narrow widgets. Related helper: getTurnSummarySegments, which returns the text segments if you build your own layout.