History tab — the workflow's chronological execution trace. Every step attempt is one event in order (so a failure and its retry appear as two rows), threaded on a status-colored spine down the left edge: the sequence is the information here, so it reads as a trace, not a flat table.

Each event is a native <details> — click the row to expand the shared StepDetail panel (timing, I/O, error, logs) inline. No LiveComponent state needed; the browser owns the open/closed disclosure.