Banking example use Deepseek model error

ai.koog.prompt.executor.clients.LLMClientException: Error from client: DeepSeekLLMClient
Error from client: DeepSeekLLMClient
Status code: 400
Error body:
{"error":{"message":"Thinking mode does not support this tool_choice","type":"invalid_request_error","param":null,"code":"invalid_request_error"}}
at ai.koog.prompt.executor.clients.openai.base.AbstractOpenAILLMClient.getResponse(AbstractOpenAILLMClient.kt:268)
at ai.koog.prompt.executor.clients.openai.base.AbstractOpenAILLMClient.access$getResponse(AbstractOpenAILLMClient.kt:73)
at ai.koog.prompt.executor.clients.openai.base.AbstractOpenAILLMClient$getResponse$1.invokeSuspend(AbstractOpenAILLMClient.kt)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:98)
at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:263)
at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:94)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:70)
at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:48)
at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
at Line_135_jupyter.(Line_135.jupyter.kts:18) at Cell In[133], line 18
at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
at kotlin.script.experimental.jvm.BasicJvmScriptEvaluator.evalWithConfigAndOtherScriptsResults(BasicJvmScriptEvaluator.kt:122)
at kotlin.script.experimental.jvm.BasicJvmScriptEvaluator.invoke$suspendImpl(BasicJvmScriptEvaluator.kt:48)
at kotlin.script.experimental.jvm.BasicJvmScriptEvaluator.invoke(BasicJvmScriptEvaluator.kt)
at kotlin.script.experimental.jvm.BasicJvmReplEvaluator.eval(BasicJvmReplEvaluator.kt:49)
at org.jetbrains.kotlinx.jupyter.repl.impl.InternalEvaluatorImpl$eval$resultWithDiagnostics$1.invokeSuspend(InternalEvaluatorImpl.kt:138)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:263)
at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:94)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:70)
at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:48)
at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
at org.jetbrains.kotlinx.jupyter.repl.impl.InternalEvaluatorImpl.eval(InternalEvaluatorImpl.kt:138)
at org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl.execute_W38Nk0s$lambda$0$1(CellExecutorImpl.kt:95)
at org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.withHost(ReplForJupyterImpl.kt:733)
at org.jetbrains.kotlinx.jupyter.repl.impl.CellExecutorImpl.execute-W38Nk0s(CellExecutorImpl.kt:93)
at org.jetbrains.kotlinx.jupyter.repl.execution.CellExecutor.execute-W38Nk0s$default(CellExecutor.kt:14)
at org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evaluateUserCode-wNURfNM(ReplForJupyterImpl.kt:590)
at org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evalExImpl(ReplForJupyterImpl.kt:471)
at org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evalEx$lambda$0(ReplForJupyterImpl.kt:465)
at org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.withEvalContext(ReplForJupyterImpl.kt:447)
at org.jetbrains.kotlinx.jupyter.repl.impl.ReplForJupyterImpl.evalEx(ReplForJupyterImpl.kt:464)
at org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.processExecuteRequest$lambda$0$0$0(IdeCompatibleMessageRequestProcessor.kt:179)
at org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:124)
at org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)
at org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedIn(IdeCompatibleMessageRequestProcessor.kt:373)
at org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.evalWithIO$lambda$0$0(IdeCompatibleMessageRequestProcessor.kt:386)
at org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:124)
at org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)
at org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedErr(IdeCompatibleMessageRequestProcessor.kt:363)
at org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.evalWithIO$lambda$0(IdeCompatibleMessageRequestProcessor.kt:385)
at org.jetbrains.kotlinx.jupyter.streams.BlockingSubstitutionEngine.withDataSubstitution(SubstitutionEngine.kt:124)
at org.jetbrains.kotlinx.jupyter.streams.StreamSubstitutionManager.withSubstitutedStreams(StreamSubstitutionManager.kt:118)
at org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.withForkedOut(IdeCompatibleMessageRequestProcessor.kt:356)
at org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.evalWithIO(IdeCompatibleMessageRequestProcessor.kt:384)
at org.jetbrains.kotlinx.jupyter.messaging.IdeCompatibleMessageRequestProcessor.processExecuteRequest$lambda$0$0(IdeCompatibleMessageRequestProcessor.kt:178)
at org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl$Task.execute(JupyterExecutorImpl.kt:41)
at org.jetbrains.kotlinx.jupyter.execution.JupyterExecutorImpl.executorThread$lambda$0(JupyterExecutorImpl.kt:81)
at kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:30)
Caused by: ai.koog.http.client.KoogHttpClientException: Error from client: DeepSeekLLMClient
Status code: 400
Error body:
{"error":{"message":"Thinking mode does not support this tool_choice","type":"invalid_request_error","param":null,"code":"invalid_request_error"}}
at ai.koog.http.client.ktor.KtorKoogHttpClient.processResponse(KtorKoogHttpClient.kt:96)
at ai.koog.http.client.ktor.KtorKoogHttpClient.access$processResponse(KtorKoogHttpClient.kt:65)
at ai.koog.http.client.ktor.KtorKoogHttpClient$post$2.invokeSuspend(KtorKoogHttpClient.kt:152)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:34)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:124)
at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:586)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:820)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:717)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:704)

ai.koog.prompt.executor.clients.LLMClientException: Error from client: DeepSeekLLMClient
Error from client: DeepSeekLLMClient
Status code: 400
Error body:
{"error":{"message":"Thinking mode does not support this tool_choice","type":"invalid_request_error","param":null,"code":"invalid_request_error"}}

at Cell In[133], line 18

Start with the banking example at Line_135_jupyter.kts:18 and trace the request through AbstractOpenAILLMClient.kt:268 and KtorKoogHttpClient.kt:96. Reproduce the DeepSeek request and identify how the reported tool_choice and thinking-mode error is triggered; done means the banking example runs without the HTTP 400 error.

Written by the indexing model from the issue text.