--- Top-level generic test runner ---

TestTransferToAgent tests the TransferToAgent functionality

TestTurnLoop_BareStop_AgentRunsToCompletion verifies the core contract of bare Stop(): the running agent finishes naturally with an uncanceled context

TestTurnLoop_CancelError_CapturedIndependentlyOfCallback verifies that the TurnLoop correctly reports *CancelError as ExitReason and populates Interru

TestTurnLoop_CancelError_CustomErrorWins_InterruptedItemsStillSet verifies that when the user's OnAgentEvents callback returns a custom error during a

============================================================================= Integration tests for race-prone preempt scenarios =====================

Context cancel tests: the TurnLoop monitors context cancellation by closing the internal buffer when ctx.Done() fires, which unblocks the blocking Rec