function combineStrategies(strategies): AgentLoopStrategy;

const stream = chat({
  adapter: openaiText(),
  model: "gpt-4o",
  messages: [...],
  tools: [weatherTool],
  agentLoopStrategy: combineStrategies([
    maxIterations(10),
    maxToolCalls(20),
    ({ messages }) => messages.length < 100,
  ]),
});