startSubagent

startSubagent(opts: SubAgentInit): SubAgent

tracing.startSubagent({name: 'critic'});

tracing.startSubagent({
  name: 'critic',
  model: 'gpt-4o',
  systemInstructions: ['Critique the proposed plan.'],
  startTime: new Date('2026-05-29T10:00:00.000Z'),
});