Advance a flow workspace agentically — validate the definition, regenerate the board, take the single highest-leverage move from the deterministic run card (overdue decision, broken contract, blocked item, missing exit evidence, ready-to-pull, over-WIP, aging, or intake), run that step under its contract, verify the exit evidence with something independent, and record the transition. Use to run a cycle, work the flow on a cadence, drive an item to its next decision, or operate the loop headlessly. Loop 1 of the flow-driven family.