de0c4605bd
A reviewer noted the quiesce() comment + ACP README said `AgentHandle.dispose()` stops the loop "with the queue-aware cancel", but the handle delegates to the start-disposer's `stop(); await agent.done`, where `stop()` sets `disposed` and aborts the current controller — it does NOT call `agent.cancel()`. The pre-step teardown window is still closed (the disposed promise wakes the parked loop and `isDisposed()` breaks before a turn starts), but the mechanism is the DISPOSED path and a mid-flight turn ends with reason `disposed`, not `aborted`. Corrected the comment and the README to describe the actual path. (This commit follows the merge of PR C's `cancel(reason)` fix up into this branch.)