[Bug]: model 里面使用 OllamaChatModel 构建，运行报错

public void harnessAgentStream() {

HarnessAgent agent = HarnessAgent.builder()
.name("麦兜")
.sysPrompt("你是一个憨憨的聊天精灵")
// .model("dashscope:qwen3.7-max")
// .model(
// OllamaChatModel.builder()
// .modelName("qwen3:8b")
// .baseUrl("http://localhost:11434")
// .build()
// )
.model(
OpenAIChatModel.builder()
.modelName("qwen3:8b")
// 关键: 将 baseUrl 指向 Ollama 的 OpenAI 兼容端点
.baseUrl("http://localhost:11434/v1")
// OpenAI 模型需要 apiKey，Ollama 本地服务可以随意填写
.apiKey("ollama")
.build()
)
.workspace(Paths.get(".agentscope/workspace"))
.compaction(CompactionConfig.builder()
.triggerMessages(30)
.keepMessages(10)
.build())
.build();

RuntimeContext ctx = RuntimeContext.builder()
.sessionId("demo-session2")
.userId("alice")
.build();

agent.streamEvents(new UserMessage("你会做东北的酸甜汤吗，里面用了很多种粮食"),ctx)
.doOnNext(event -> {
if (event.getType() == AgentEventType.TEXT_BLOCK_DELTA) {
// 模型返回的流式文本片段 —— 追加到界面或标准输出
System.out.print(((TextBlockDeltaEvent) event).getDelta());
} else if (event.getType() == AgentEventType.TOOL_CALL_START) {
// 智能体即将调用工具 —— 展示调用信息
System.out.println("\n[tool] " + ((ToolCallStartEvent) event).getToolCallName());
}
// 其他事件：思考块、工具结果、回复结束等
})
.blockLast();
}

这个 2.0.0-RC1 版本中，model 使用本地的OllamaChatModel流式调用会报错，使用其它的不会报错！
报错内容：
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "io.agentscope.core.model.GenerateOptions.getToolChoice()" because "options" is null
at io.agentscope.core.model.OllamaChatModel.doStream(OllamaChatModel.java:144)
at io.agentscope.core.model.ChatModelBase.lambda$stream$0(ChatModelBase.java:47)
at io.agentscope.core.tracing.Tracer.callModel(Tracer.java:52)
at io.agentscope.core.model.ChatModelBase.stream(ChatModelBase.java:46)
at io.agentscope.harness.agent.memory.MemoryFlushManager.flushMemories(MemoryFlushManager.java:143)
at io.agentscope.harness.agent.middleware.MemoryFlushMiddleware.doFlush(MemoryFlushMiddleware.java:85)
at io.agentscope.harness.agent.middleware.MemoryFlushMiddleware.lambda$onAgent$0(MemoryFlushMiddleware.java:65)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:251)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)
at reactor.core.publisher.FluxCreate$BaseSink.complete(FluxCreate.java:465)
at reactor.core.publisher.FluxCreate$BufferAsyncSink.drain(FluxCreate.java:871)
at reactor.core.publisher.FluxCreate$BufferAsyncSink.complete(FluxCreate.java:819)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.drainLoop(FluxCreate.java:249)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.drain(FluxCreate.java:215)
at reactor.core.publisher.FluxCreate$SerializedFluxSink.complete(FluxCreate.java:206)
at io.agentscope.core.ReActAgent.lambda$streamEvents$4(ReActAgent.java:526)
at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.runFinally(FluxDoFinally.java:146)
at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.onComplete(FluxDoFinally.java:129)
at reactor.core.publisher.MonoUsing$MonoUsingSubscriber.onNext(MonoUsing.java:232)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.complete(MonoIgnoreThen.java:294)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onNext(MonoIgnoreThen.java:188)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:237)
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:165)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2570)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:171)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.request(MonoFlatMap.java:194)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onSubscribe(MonoFlatMap.java:291)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:117)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:96)
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:55)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:76)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:165)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.complete(MonoIgnoreThen.java:294)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onNext(MonoIgnoreThen.java:188)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:237)
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:165)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:74)
at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onNext(FluxHide.java:137)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.complete(MonoIgnoreThen.java:294)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onNext(MonoIgnoreThen.java:188)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:74)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2570)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2366)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2240)
at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:193)
at reactor.core.publisher.MonoFlatMap.subscribeOrReturn(MonoFlatMap.java:53)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:63)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:165)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondComplete(MonoFlatMap.java:245)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:305)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.complete(MonoIgnoreThen.java:294)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onNext(MonoIgnoreThen.java:188)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2570)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onSubscribe(MonoIgnoreThen.java:135)
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:55)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:53)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:241)
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onComplete(MonoIgnoreThen.java:204)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onComplete(Operators.java:2230)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260)
at reactor.core.publisher.FluxConcatArray$ConcatArraySubscriber.onComplete(FluxConcatArray.java:209)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.onComplete(FluxConcatMapNoPrefetch.java:241)
at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.onComplete(FluxConcatMapNoPrefetch.java:241)
at reactor.core.publisher.SerializedSubscriber.onComplete(SerializedSubscriber.java:146)
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.onComplete(FluxRetryWhen.java:204)
at reactor.core.publisher.SerializedSubscriber.onComplete(SerializedSubscriber.java:146)
at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.onComplete(FluxTimeout.java:235)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onComplete(FluxMap.java:275)
at reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.onComplete(FluxSubscribeOn.java:166)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onComplete(Operators.java:2230)
at reactor.core.publisher.FluxPublishOn$PublishOnSubscriber.doComplete(FluxPublishOn.java:511)
at reactor.core.publisher.FluxPublishOn$PublishOnSubscriber.checkTerminated(FluxPublishOn.java:558)
at reactor.core.publisher.FluxPublishOn$PublishOnSubscriber.runAsync(FluxPublishOn.java:438)
at reactor.core.publisher.FluxPublishOn$PublishOnSubscriber.run(FluxPublishOn.java:533)
at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:84)
at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:37)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:842)
Suppressed: java.lang.Exception: #block terminated with an error
at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:104)
at reactor.core.publisher.Flux.blockLast(Flux.java:2817)
at com.demo.FirstAgent.harnessAgentStream(FirstAgent.java:85)
at com.demo.FirstAgent.main(FirstAgent.java:91)
解决办法：
OpenAIChatModel.builder()
.modelName("qwen3:8b")
// 关键: 将 baseUrl 指向 Ollama 的 OpenAI 兼容端点
.baseUrl("http://localhost:11434/v1")
// OpenAI 模型需要 apiKey，Ollama 本地服务可以随意填写
.apiKey("ollama")
.build()
使用 OpenAIChatModel 转换一下，输出正常了