Type Alias AgentStopReason

AgentStopReason: "agent-stopped" | "turn-budget" | "tool-error" | "cancelled"

Why the agent loop stopped.

agent-stopped: model emitted no further tool calls — natural end
turn-budget: hit turnBudget before the model finished
tool-error: onToolCall threw; harness's responsibility to grade
cancelled: external AbortSignal fired