# LangChain JS + OpenAI Responses API: stateless GPT-5 reasoning messages cause \`400 …reasoning without its required following item\` **URL:** \ **Category:** LangChain\ **Tags:** js-help\ **Created:** [September 29, 2025, 4:33pm UTC](https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688 "2025-09-29T16:33:03Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![niccotnt](https://avatars.discourse-cdn.com/v4/letter/n/58956e/32.png) [@niccotnt](https://forum.langchain.com/u/niccotnt)\ **Post date:** [September 29, 2025, 4:33pm UTC](https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688/1 "2025-09-29T16:33:03Z")
Hello everybody, I’m trying to figure out how to implement a **stateless** interaction with a GPT-5 model, with reasoning. This is my very basic code snippet, where I force the model to reason and call a tool. ```ts // ...imports const tools: DynamicStructuredTool[] = [...]; // Instantiate the model let runnable: Runnable = new ChatOpenAI({ modelName: "gpt-5-2025-08-07", temperature: 1, openAIApiKey: " ****", streaming: false, useResponsesApi: true }).bindTools(tools); const messages: BaseMessage[] = [ new SystemMessage(" *****"), new HumanMessage(" *****") ]; const callOptions = {}; let response: BaseMessage = await runnable.invoke(messages, callOptions); if ("tool_calls" in response && Array.isArray(response.tool_calls) && response.tool_calls.length > 0) { const toolResults = []; for (const toolCall of response.tool_calls) { const { name, args } = toolCall; const tool = tools.find(t => t.name === name); let output = await tool.func(args); const toolMessageOutput: ToolMessageFieldsWithToolCallId = { tool_call_id: toolCall.id, content: typeof output === "string" ? output : JSON.stringify(output), }; toolResults.push(new ToolMessage(toolMessageOutput)); } messages.push(response, ...toolResults); } response = await runnable.invoke(messages, callOptions); ``` .. and the last invoke call throws an error: ```auto BadRequestError: 400 Item 'rs_68daad45e5d8819592cbd2a8230ec4df019eeee1dd56aefc' of type 'reasoning' was provided without its required following item. at Function.generate (C:\ **** \node-projects\bookmaster\node_modules\openai\src\core\error.ts:72:14) at OpenAI.makeStatusError (C:\ **** \node-projects\bookmaster\node_modules\openai\src\client.ts:445:28) at OpenAI.makeRequest (C:\ **** \node-projects\bookmaster\node_modules\openai\src\client.ts:668:24) at processTicksAndRejections (node:internal/process/task_queues:105:5) at async C:\ **** \node-projects\bookmaster\node_modules\@langchain\openai\dist\chat_models.cjs:1202:24 at async RetryOperation._fn (C:\ **** \node-projects\bookmaster\node_modules\p-retry\index.js:50:12) { status: 400, headers: { ... }, requestID: 'req_4a8f20b187070e4ea9218ca13f0ff645', error: { message: "Item 'rs_68daad45e5d8819592cbd2a8230ec4df019eeee1dd56aefc' of type 'reasoning' was provided without its required following item.", type: 'invalid_request_error', param: 'input', code: null }, code: null, param: 'input', type: 'invalid_request_error', attemptNumber: 1, retriesLeft: 6 } ``` From what I understand, I need to resend the `reasoning` type message (like an echo), but LangChain does not provide a `ReasoningMessage extends BaseMessage` type to insert into the conversation. How can I do this? Here is the full stateless conversation I get: **First interaction:** ```json [ SystemMessage { "content": " *****", "additional_kwargs": {}, "response_metadata": {} }, HumanMessage { "content": [ { "type": "text", "text": " *****" } ], "additional_kwargs": {}, "response_metadata": {} } ] ``` **First Model response:** ```json AIMessage { "content": [], "additional_kwargs": { "reasoning": { "id": "rs_68daad45e5d8819592cbd2a8230ec4df019eeee1dd56aefc", "type": "reasoning", "summary": [] }, " __openai_function_call_ids__": { "call_vfJ1fZdxk8IhTRCjYnf0b3le": "fc_68daad7cad408195868dfdaf75c0b158019eeee1dd56aefc" } }, "response_metadata": { "id": "resp_68daad453f6081959038cc97fb020159019eeee1dd56aefc", "estimatedTokenUsage": { "promptTokens": 1348, "completionTokens": 3610, "totalTokens": 4958 }, "model": "gpt-5-2025-08-07", "created_at": 1759161669, "incomplete_details": null, "metadata": {}, "object": "response", "status": "completed", "user": null, "service_tier": "default", "model_name": "gpt-5-2025-08-07" }, "tool_calls": [ { "name": " ******", "args": { ... }, "type": "tool_call", "id": "call_vfJ1fZdxk8IhTRCjYnf0b3le" } ], "invalid_tool_calls": [], "usage_metadata": { "input_tokens": 1348, "input_tokens_details": { "cached_tokens": 0 }, "output_tokens": 3610, "output_tokens_details": { "reasoning_tokens": 3584 }, "total_tokens": 4958 } } ``` * * * **Then I call again the invoke method with the following messages:** ```json [ SystemMessage { ... as before ... }, HumanMessage { ... as before ... }, AIMessage { ... as before ... }, ToolMessage { "content": "{\"success\":true,\"message\":\" ***** \"}", "additional_kwargs": {}, "response_metadata": {}, "tool_call_id": "call_vfJ1fZdxk8IhTRCjYnf0b3le" } ] ``` Here I get the error: ```auto BadRequestError: 400 Item 'rs_ *****' of type 'reasoning' was provided without its required following item. ``` Please note that with gpt-4o the interaction works perfectly. ---
**Author:** ![pawel-twardziak](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.langchain.com/pawel-twardziak/32/960_2.png) [@pawel-twardziak](https://forum.langchain.com/u/pawel-twardziak)\ **Post date:** [September 29, 2025, 9:30pm UTC](https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688/2 "2025-09-29T21:30:15Z")
Hi @niccotnt interesting issue… Have you tried setting `useResponsesApi: false` for GPT-5? ---
**Author:** ![pawel-twardziak](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.langchain.com/pawel-twardziak/32/960_2.png) [@pawel-twardziak](https://forum.langchain.com/u/pawel-twardziak)\ **Post date:** [September 29, 2025, 9:41pm UTC](https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688/3 "2025-09-29T21:41:13Z")
Anyway, maybe this would help: ```js function sanitizeAssistantForResponsesApi(ai: AIMessage): AIMessage { const additional = { ...(ai.additional_kwargs ?? {}) } as Record; // 'reasoning' is output-only in the Responses API; never send it back in input if ("reasoning" in additional) delete additional.reasoning; return new AIMessage({ content: ai.content, tool_calls: ai.tool_calls ?? [], additional_kwargs: additional, }); } // ... if ("tool_calls" in response && Array.isArray(response.tool_calls) && response.tool_calls.length > 0) { // ... // IMPORTANT: push a sanitized copy of the assistant message (no 'reasoning') messages.push(sanitizeAssistantForResponsesApi(response as AIMessage), ...toolResults); } ``` Let me know whether or not this helps 🙂 ---
**Author:** ![hntrl](https://avatars.discourse-cdn.com/v4/letter/h/ccd318/32.png) [@hntrl](https://forum.langchain.com/u/hntrl)\ **Post date:** [September 29, 2025, 9:47pm UTC](https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688/4 "2025-09-29T21:47:35Z")
Hey @niccotnt, thanks for flagging this. Would you mind opening an issue on the [langchainjs](https://github.com/langchain-ai/langchainjs/issues/new/choose) repo? @pawel-twardziak‘s solution does resolve the error, but dropping the reasoning content is definitely not desired. The sequencing for reasoning items is important as the error mentioned, however I think it might be an exclusive behavior of gpt-5 that reasoning items can exist for tool calls (which isn’t something that I’ve seen before) ---
**Author:** ![niccotnt](https://avatars.discourse-cdn.com/v4/letter/n/58956e/32.png) [@niccotnt](https://forum.langchain.com/u/niccotnt)\ **Post date:** [September 30, 2025, 10:57am UTC](https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688/5 "2025-09-30T10:57:47Z")
Thank you @hntrl and @pawel-twardziak for your reply. If I remove the reasoning item from additional\_kwargs it works, but continuing the interaction, at some point I receive: ```auto BadRequestError: 400 Item 'msg_0bf77cc637a35af90068dbb4da9dfc8195a981bc6cb8fc4361' of type 'message' was provided without its required 'reasoning' item: 'rs_0bf77cc637a35af90068dbb4c69b8c8195929f8311e89903fb'. at Function.generate (C:\ **** \node-projects\bookmaster\node_modules\openai\src\core\error.ts:72:14) at OpenAI.makeStatusError (C:\ **** \node-projects\bookmaster\node_modules\openai\src\client.ts:445:28) at OpenAI.makeRequest (C:\ **** \node-projects\bookmaster\node_modules\openai\src\client.ts:668:24) at processTicksAndRejections (node:internal/process/task_queues:105:5) at async C:\ **** \node-projects\bookmaster\node_modules\@langchain\openai\dist\chat_models.cjs:1202:24 at async RetryOperation._fn (C:\ **** \node-projects\bookmaster\node_modules\p-retry\index.js:50:12) { status: 400, headers: Headers { ... } ``` I think the reasoning items must be expected for every message and they can occur everywhere, with or without tool\_calls, and they must be handled correctly. I will open an issue as suggested by @hntrl . Thanks ---
**Author:** ![niccotnt](https://avatars.discourse-cdn.com/v4/letter/n/58956e/32.png) [@niccotnt](https://forum.langchain.com/u/niccotnt)\ **Post date:** [September 30, 2025, 1:22pm UTC](https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688/6 "2025-09-30T13:22:39Z")
Bug opened here > > > \### Checked other resources > > \- \[x\] This is a bug, not a usage question. For ques…tions, please use the LangChain Forum (https://forum.langchain.com/). > \- \[x\] I added a very descriptive title to this issue. > \- \[x\] I searched the LangChain.js documentation with the integrated search. > \- \[x\] I used the GitHub search to find a similar question and didn't find it. > \- \[x\] I am sure that this is a bug in LangChain.js rather than my code. > \- \[x\] The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package). > > \### Example Code > > \`\`\`typescript > // ...imports > > const tools: DynamicStructuredTool\[\] = \[... \]; > > // Instantiate the model > let runnable: Runnable = new ChatOpenAI({ > modelName: "gpt-5-2025-08-07", > temperature: 1, > openAIApiKey: "\*\*\*\*", > streaming: false, > useResponsesApi: true > }).bindTools(tools); > > const messages: BaseMessage\[\] = \[ > new SystemMessage("\*\*\*\*\*"), > new HumanMessage("\*\*\*\*\*") > \]; > const callOptions = {}; > > let response: BaseMessage = await runnable.invoke(messages, callOptions); > if ("tool\_calls" in response && Array.isArray(response.tool\_calls) && response.tool\_calls.length \> 0) { > const toolResults = \[\]; > for (const toolCall of response.tool\_calls) { > const { name, args } = toolCall; > const tool = tools.find(t =\> t.name === name); > let output = await tool.func(args); > const toolMessageOutput: ToolMessageFieldsWithToolCallId = { > tool\_call\_id: toolCall.id, > content: typeof output === "string" ? output : JSON.stringify(output), > }; > toolResults.push(new ToolMessage(toolMessageOutput)); > } > messages.push(response, ...toolResults); > } > > response = await runnable.invoke(messages, callOptions); > \`\`\` > > \### Error Message and Stack Trace (if applicable) > > \`\`\` > BadRequestError: 400 Item 'rs\_68daad45e5d8819592cbd2a8230ec4df019eeee1dd56aefc' of type 'reasoning' was provided without its required following item. > at Function.generate (C:\\\*\*\*\*\\node-projects\\bookmaster\\node\_modules\\openai\\src\\core\\error.ts:72:14) > at OpenAI.makeStatusError (C:\\\*\*\*\*\\node-projects\\bookmaster\\node\_modules\\openai\\src\\client.ts:445:28) > at OpenAI.makeRequest (C:\\\*\*\*\*\\node-projects\\bookmaster\\node\_modules\\openai\\src\\client.ts:668:24) > at processTicksAndRejections (node:internal/process/task\_queues:105:5) > at async C:\\\*\*\*\*\\node-projects\\bookmaster\\node\_modules\\@langchain\\openai\\dist\\chat\_models.cjs:1202:24 > at async RetryOperation.\_fn (C:\\\*\*\*\*\\node-projects\\bookmaster\\node\_modules\\p-retry\\index.js:50:12) { > status: 400, > headers: { ... }, > requestID: 'req\_4a8f20b187070e4ea9218ca13f0ff645', > error: { > message: "Item 'rs\_68daad45e5d8819592cbd2a8230ec4df019eeee1dd56aefc' of type 'reasoning' was provided without its required following item.", > type: 'invalid\_request\_error', > param: 'input', > code: null > }, > code: null, > param: 'input', > type: 'invalid\_request\_error', > attemptNumber: 1, > retriesLeft: 6 > } > \`\`\` > > \### Description > > I’m trying to figure out how to implement a stateless interaction with a GPT-5 model, with reasoning. > I'm forcing the model, with a complex prompt, to reason and call a tool. > I attached a snippet of the code for the most basic interaction I'm trying to achieve. > > I can see the AIMessage contains both tool\_calls and reasoing item (stored in additional\_kwargs), but when I send back the AIMessage and the ToolMessage with outputs I receive the error I attached. > > Please see the full thread with more examples and more errors in the official forum: > https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688 > > > > \### System Info > > \`\`\` > yarn info v1.22.22 > { > name: 'langchain', > 'dist-tags': { > 'tag-for-publishing-older-releases': '0.2.20', > latest: '0.3.35', > alpha: '1.0.0-alpha.7', > next: '1.0.0-alpha.7' > }, > versions: \[ > '0.0.4', > '0.0.5', > '0.0.6', > '0.0.7', > '0.0.8', > '0.0.9', > '0.0.10', > '0.0.11', > '0.0.12', > '0.0.13', > '0.0.14', > '0.0.15', > '0.0.16', > '0.0.17', > '0.0.18', > '0.0.19', > '0.0.20', > '0.0.21', > '0.0.22', > '0.0.23', > '0.0.24', > '0.0.25', > '0.0.26', > '0.0.27', > '0.0.28', > '0.0.29', > '0.0.30', > '0.0.31', > '0.0.32', > '0.0.33', > '0.0.34', > '0.0.35', > '0.0.36', > '0.0.37', > '0.0.38', > '0.0.39', > '0.0.40', > '0.0.41', > '0.0.42', > '0.0.43', > '0.0.44', > '0.0.45', > '0.0.46', > '0.0.47', > '0.0.48', > '0.0.49-0', > '0.0.49-1', > '0.0.49', > '0.0.50', > '0.0.51', > '0.0.52-0', > '0.0.52', > '0.0.53', > '0.0.54', > '0.0.55', > '0.0.56', > '0.0.57', > '0.0.58', > '0.0.59', > '0.0.60', > '0.0.61', > '0.0.62', > '0.0.63', > '0.0.64', > '0.0.65', > '0.0.66', > '0.0.67', > '0.0.68', > '0.0.69', > '0.0.70', > '0.0.71', > '0.0.72', > '0.0.73', > '0.0.74', > '0.0.75', > '0.0.76', > '0.0.77', > '0.0.78', > 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'0.0.157', > '0.0.158', > '0.0.159', > '0.0.160', > '0.0.161', > '0.0.162', > '0.0.163', > '0.0.164', > '0.0.165', > '0.0.166', > '0.0.167', > '0.0.168', > '0.0.169', > '0.0.170', > '0.0.171', > '0.0.172', > '0.0.173', > '0.0.174', > '0.0.175', > '0.0.176', > '0.0.177', > '0.0.178', > '0.0.179', > '0.0.180', > '0.0.181', > '0.0.182-rc.0', > '0.0.182-rc.1', > '0.0.182', > '0.0.183', > '0.0.184', > '0.0.185', > '0.0.186', > '0.0.187', > '0.0.188', > '0.0.189', > '0.0.190', > '0.0.191', > '0.0.192', > '0.0.193', > '0.0.194', > '0.0.195', > '0.0.196', > '0.0.197-rc.0', > '0.0.197-rc.1', > '0.0.197', > '0.0.198', > '0.0.199', > '0.0.200', > '0.0.201', > '0.0.202', > '0.0.203', > '0.0.204-rc.0', > '0.0.204-rc.1', > '0.0.204-rc.2', > '0.0.204', > '0.0.205', > '0.0.206', > '0.0.207', > '0.0.208', > '0.0.209-rc.0', > '0.0.209', > '0.0.210', > '0.0.211', > '0.0.212', > '0.0.213', > '0.0.214', > '0.1.0-rc.0', > '0.1.0-rc.1', > '0.1.0', > '0.1.1', > '0.1.2', > '0.1.3', > '0.1.4', > '0.1.5', > '0.1.6', > '0.1.7', > '0.1.8', > '0.1.9-rc.0', > '0.1.9', > '0.1.10', > '0.1.11', > '0.1.12', > '0.1.13', > '0.1.14', > '0.1.15', > '0.1.16-rc.0', > '0.1.16', > '0.1.17', > '0.1.18', > '0.1.19-rc.0', > '0.1.19-rc.1', > '0.1.19-rc.2', > '0.1.19', > '0.1.20', > '0.1.21', > '0.1.22', > '0.1.23', > '0.1.24', > '0.1.25', > '0.1.26', > '0.1.27', > '0.1.28', > '0.1.29-rc.0', > '0.1.29', > '0.1.30', > '0.1.31', > '0.1.32', > '0.1.33', > '0.1.34', > '0.1.35', > '0.1.36', > '0.1.37', > '0.2.0-rc.0', > '0.2.0-rc.1', > '0.2.0', > '0.2.1', > '0.2.2', > '0.2.3-rc.0', > '0.2.3', > '0.2.4', > '0.2.5', > '0.2.6', > '0.2.7', > '0.2.8', > '0.2.9', > '0.2.10', > '0.2.11', > '0.2.12', > '0.2.13', > '0.2.14', > '0.2.15', > '0.2.16', > '0.2.17', > '0.2.18', > '0.2.19', > '0.2.20', > '0.3.0-rc.0', > '0.3.0', > '0.3.1', > '0.3.2-rc.0', > '0.3.2', > '0.3.3', > '0.3.4', > '0.3.5', > '0.3.6', > '0.3.7', > '0.3.8', > '0.3.9', > '0.3.10', > '0.3.11', > '0.3.12', > '0.3.13', > '0.3.14', > '0.3.15', > '0.3.16', > '0.3.17', > '0.3.18', > '0.3.19', > '0.3.20', > '0.3.21', > '0.3.22', > '0.3.23', > '0.3.24', > '0.3.25', > '0.3.26', > '0.3.27', > '0.3.28', > '0.3.29', > '0.3.30', > '0.3.31', > '0.3.32', > '0.3.33', > '0.3.34', > '0.3.35', > '1.0.0-alpha.1', > '1.0.0-alpha.2', > '1.0.0-alpha.3', > '1.0.0-alpha.4', > '1.0.0-alpha.5', > '1.0.0-alpha.6', > '1.0.0-alpha.7' > \], > time: { > created: '2023-02-14T18:06:57.074Z', > modified: '2025-09-29T16:26:40.407Z', > '1.0.0': '2023-01-20T03:45:29.634Z', > '1.0.9': '2023-01-22T02:02:57.467Z', > '0.0.1': '2023-01-26T21:22:58.657Z', > '0.0.4': '2023-02-14T18:06:57.434Z', > '0.0.5': '2023-02-17T05:51:37.227Z', > '0.0.6': '2023-02-17T08:53:32.946Z', > '0.0.7': '2023-02-18T00:31:00.386Z', > '0.0.8': '2023-02-20T04:56:45.683Z', > '0.0.9': '2023-02-21T07:17:14.208Z', > '0.0.10': '2023-02-22T18:48:35.631Z', > '0.0.11': '2023-02-23T16:12:41.455Z', > '0.0.12': '2023-02-26T18:49:26.071Z', > '0.0.13': '2023-02-27T16:03:50.432Z', > '0.0.14': 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'2023-08-25T04:45:19.565Z', > '0.0.135': '2023-08-26T00:44:11.083Z', > '0.0.136': '2023-08-29T01:36:44.900Z', > '0.0.137': '2023-08-30T01:34:15.475Z', > '0.0.138': '2023-08-31T02:22:36.630Z', > '0.0.139': '2023-09-01T07:20:17.993Z', > '0.0.140': '2023-09-02T00:37:02.261Z', > '0.0.141': '2023-09-03T07:34:21.546Z', > '0.0.142': '2023-09-04T20:15:53.914Z', > '0.0.143': '2023-09-05T14:41:59.202Z', > '0.0.144': '2023-09-06T01:21:44.338Z', > '0.0.145': '2023-09-07T01:35:35.892Z', > '0.0.146': '2023-09-08T15:27:22.355Z', > '0.0.147': '2023-09-12T06:22:04.926Z', > '0.0.148': '2023-09-13T03:03:39.760Z', > '0.0.149': '2023-09-14T01:40:17.567Z', > '0.0.150': '2023-09-15T06:28:14.560Z', > '0.0.151': '2023-09-19T03:53:15.800Z', > '0.0.152': '2023-09-20T00:08:57.506Z', > '0.0.153': '2023-09-21T03:10:39.410Z', > '0.0.154': '2023-09-26T01:47:45.016Z', > '0.0.155': '2023-09-28T01:35:14.504Z', > '0.0.156': '2023-09-29T05:55:44.312Z', > '0.0.157': '2023-10-02T01:10:49.355Z', > '0.0.158': 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'0.2.7': '2024-06-25T19:24:56.599Z', > '0.2.8': '2024-06-28T01:05:43.266Z', > '0.2.9': '2024-07-10T01:19:00.661Z', > '0.2.10': '2024-07-16T04:39:54.756Z', > '0.2.11': '2024-07-24T23:01:59.481Z', > '0.2.12': '2024-07-30T16:59:27.878Z', > '0.2.13': '2024-08-06T23:34:44.938Z', > '0.2.14': '2024-08-09T19:52:51.258Z', > '0.2.15': '2024-08-10T15:14:36.266Z', > '0.2.16': '2024-08-13T11:41:17.160Z', > '0.2.17': '2024-08-23T01:13:12.015Z', > '0.2.18': '2024-09-04T22:45:35.518Z', > '0.3.0-rc.0': '2024-09-07T00:10:44.310Z', > '0.2.19': '2024-09-11T23:34:20.084Z', > '0.3.0': '2024-09-13T21:43:36.208Z', > '0.3.1': '2024-09-15T05:37:11.723Z', > '0.3.2-rc.0': '2024-09-15T05:53:56.512Z', > '0.3.2': '2024-09-15T06:16:32.327Z', > '0.2.20': '2024-09-15T06:29:13.500Z', > '0.3.3': '2024-10-21T18:07:59.871Z', > '0.3.4': '2024-10-25T03:33:59.476Z', > '0.3.5': '2024-10-28T00:27:14.931Z', > '0.3.6': '2024-11-17T06:50:09.362Z', > '0.3.7': '2024-12-11T18:02:28.477Z', > '0.3.8': '2024-12-24T18:53:32.828Z', > '0.3.9': '2025-01-02T03:13:31.224Z', > '0.3.10': '2025-01-07T00:35:28.251Z', > '0.3.11': '2025-01-10T22:33:47.736Z', > '0.3.12': '2025-01-20T01:50:04.488Z', > '0.3.13': '2025-01-25T01:56:33.034Z', > '0.3.14': '2025-01-28T15:55:29.535Z', > '0.3.15': '2025-01-29T23:56:06.188Z', > '0.3.16': '2025-02-18T01:20:19.602Z', > '0.3.17': '2025-02-18T01:28:41.518Z', > '0.3.18': '2025-02-18T03:10:11.563Z', > '0.3.19': '2025-02-19T04:33:33.819Z', > '0.3.20': '2025-04-03T21:03:27.866Z', > '0.3.21': '2025-04-09T07:36:17.760Z', > '0.3.22': '2025-04-17T03:22:51.115Z', > '0.3.23': '2025-04-18T22:48:00.903Z', > '0.3.24': '2025-04-24T00:15:05.308Z', > '0.3.25': '2025-05-14T05:09:01.215Z', > '0.3.26': '2025-05-16T04:20:22.395Z', > '0.3.27': '2025-05-22T04:47:31.715Z', > '0.3.28': '2025-06-11T21:38:17.136Z', > '0.3.29': '2025-06-20T01:21:12.870Z', > '0.3.30': '2025-07-15T19:52:08.285Z', > '0.3.31': '2025-08-19T00:07:56.530Z', > '1.0.0-alpha.1': '2025-08-28T21:53:30.502Z', > '1.0.0-alpha.2': '2025-08-28T23:39:23.030Z', > '1.0.0-alpha.3': '2025-09-02T03:26:41.420Z', > '1.0.0-alpha.4': '2025-09-02T16:34:19.059Z', > '0.3.32': '2025-09-02T19:19:24.539Z', > '0.3.33': '2025-09-04T21:53:42.553Z', > '1.0.0-alpha.5': '2025-09-08T08:49:07.024Z', > '0.3.34': '2025-09-15T20:52:11.165Z', > '1.0.0-alpha.6': '2025-09-15T22:56:53.188Z', > '1.0.0-alpha.7': '2025-09-26T21:29:36.761Z', > '0.3.35': '2025-09-29T16:26:39.971Z' > }, > bugs: { > url: 'https://github.com/langchain-ai/langchainjs/issues' > }, > author: { > name: 'LangChain' > }, > license: 'MIT', > homepage: 'https://github.com/langchain-ai/langchainjs/tree/main/langchain/', > keywords: \[ > 'llm', > 'ai', > 'gpt3', > 'chain', > 'prompt', > 'prompt engineering', > 'chatgpt', > 'machine learning', > 'ml', > 'openai', > 'embeddings', > 'vectorstores' > \], > repository: { > type: 'git', > url: 'git+ssh://git@github.com/langchain-ai/langchainjs.git' > }, > description: 'Typescript bindings for langchain', > maintainers: \[ > { > name: 'christian-bromann', > email: 'mail@bromann.dev' > }, > { > name: 'nfcampos', > email: 'nuno@boringbits.io' > }, > { > name: 'jacoblee93', > email: 'jacoblee93@gmail.com' > }, > { > name: 'andrewnguonly', > email: 'andrewnguonly@gmail.com' > }, > { > name: 'davidduong', > email: 'david@duong.cz' > }, > { > name: 'hntrl', > email: 'hunter@hntrl.io' > }, > { > name: 'hwchase17', > email: 'hw.chase.17@gmail.com' > }, > { > name: 'basproul', > email: 'braceasproul@gmail.com' > } > \], > readmeFilename: 'README.md', > version: '0.3.35', > type: 'module', > engines: { > node: '\>=18' > }, > main: './index.js', > types: './index.d.ts', > scripts: { > build: 'yarn turbo:command build:internal --filter=langchain', > 'build:internal': 'yarn lc\_build --create-entrypoints --pre --tree-shaking --gen-maps', > 'lint:eslint': 'NODE\_OPTIONS=--max-old-space-size=4096 eslint --cache --ext .ts,.js src/', > 'lint:dpdm': 'dpdm --skip-dynamic-imports circular --exit-code circular:1 --no-warning --no-tree src/\*.ts src/\*\*/\*.ts', > lint: 'yarn lint:eslint && yarn lint:dpdm', > 'lint:fix': 'yarn lint:eslint --fix && yarn lint:dpdm', > precommit: 'lint-staged', > clean: 'rm -rf .turbo dist/', > prepack: 'yarn build', > release: 'release-it --only-version --config .release-it.json', > test: 'NODE\_OPTIONS=--experimental-vm-modules jest --testPathIgnorePatterns=\\\\.int\\\\.test.ts --testTimeout 30000 --maxWorkers=50%', > 'test:watch': 'NODE\_OPTIONS=--experimental-vm-modules jest --watch --testPathIgnorePatterns=\\\\.int\\\\.test.ts', > 'test:integration': 'NODE\_OPTIONS=--experimental-vm-modules jest --testPathPattern=\\\\.int\\\\.test.ts --testTimeout 100000 --maxWorkers=50%', > 'test:single': 'NODE\_OPTIONS=--experimental-vm-modules yarn run jest --config jest.config.cjs --testTimeout 100000', > format: 'prettier --config .prettierrc --write "src"', > 'format:check': 'prettier --config .prettierrc --check "src"' > }, > devDependencies: { > '@faker-js/faker': '^7.6.0', > '@jest/globals': '^29.5.0', > '@langchain/anthropic': '\*', > '@langchain/aws': '\*', > '@langchain/cerebras': '\*', > '@langchain/cohere': '\*', > '@langchain/core': 'workspace:\*', > '@langchain/deepseek': '\*', > '@langchain/google-genai': '\*', > '@langchain/google-vertexai': '\*', > '@langchain/google-vertexai-web': '\*', > '@langchain/groq': '\*', > '@langchain/mistralai': '\*', > '@langchain/ollama': '\*', > '@langchain/scripts': '\>=0.1.0 \<0.2.0', > '@langchain/xai': '\*', > '@swc/core': '^1.3.90', > '@swc/jest': '^0.2.29', > '@tsconfig/recommended': '^1.0.2', > '@types/handlebars': '^4.1.0', > '@types/html-to-text': '^9', > '@types/js-yaml': '^4', > '@types/jsdom': '^21.1.1', > '@types/uuid': '^9', > '@types/ws': '^8', > '@typescript-eslint/eslint-plugin': '^5.58.0', > '@typescript-eslint/parser': '^5.58.0', > axios: '^1.12.0', > cheerio: '1.0.0-rc.12', > dotenv: '^16.0.3', > dpdm: '^3.14.0', > eslint: '^8.33.0', > 'eslint-config-airbnb-base': '^15.0.0', > 'eslint-config-prettier': '^8.6.0', > 'eslint-plugin-import': '^2.27.5', > 'eslint-plugin-jest': '^27.6.0', > 'eslint-plugin-no-instanceof': '^1.0.1', > 'eslint-plugin-prettier': '^4.2.1', > handlebars: '^4.7.8', > jest: '^29.5.0', > 'jest-environment-node': '^29.6.4', > openai: '^5.1.0', > peggy: '^3.0.2', > prettier: '^2.8.3', > 'reflect-metadata': '^0.2.2', > 'release-it': '^18.1.2', > rimraf: '^5.0.1', > rollup: '^3.19.1', > 'ts-jest': '^29.1.0', > typeorm: '^0.3.20', > typescript: '~5.8.3', > wikipedia: '^2.1.2' > }, > peerDependencies: { > '@langchain/anthropic': '\*', > '@langchain/aws': '\*', > '@langchain/cerebras': '\*', > '@langchain/cohere': '\*', > '@langchain/core': '\>=0.3.58 \<0.4.0', > '@langchain/deepseek': '\*', > '@langchain/google-genai': '\*', > '@langchain/google-vertexai': '\*', > '@langchain/google-vertexai-web': '\*', > '@langchain/groq': '\*', > '@langchain/mistralai': '\*', > '@langchain/ollama': '\*', > '@langchain/xai': '\*', > axios: '\*', > cheerio: '\*', > handlebars: '^4.7.8', > peggy: '^3.0.2', > typeorm: '\*' > }, > peerDependenciesMeta: { > '@langchain/anthropic': { > optional: true > }, > '@langchain/aws': { > optional: true > }, > '@langchain/cerebras': { > optional: true > }, > '@langchain/cohere': { > optional: true > }, > '@langchain/deepseek': { > optional: true > }, > '@langchain/google-genai': { > optional: true > }, > '@langchain/google-vertexai': { > optional: true > }, > '@langchain/google-vertexai-web': { > optional: true > }, > '@langchain/groq': { > optional: true > }, > '@langchain/mistralai': { > optional: true > }, > '@langchain/ollama': { > optional: true > }, > '@langchain/xai': { > optional: true > }, > axios: { > optional: true > }, > cheerio: { > optional: true > }, > handlebars: { > optional: true > }, > peggy: { > optional: true > }, > typeorm: { > optional: true > } > }, > dependencies: { > '@langchain/openai': '\>=0.1.0 \<0.7.0', > '@langchain/textsplitters': '\>=0.0.0 \<0.2.0', > 'js-tiktoken': '^1.0.12', > 'js-yaml': '^4.1.0', > jsonpointer: '^5.0.1', > langsmith: '^0.3.67', > 'openapi-types': '^12.1.3', > 'p-retry': '4', > uuid: '^10.0.0', > yaml: '^2.2.1', > zod: '^3.25.32' > }, > publishConfig: { > access: 'public' > }, > exports: { > './load': { > types: { > import: './load.d.ts', > require: './load.d.cts', > default: './load.d.ts' > }, > import: './load.js', > require: './load.cjs' > }, > './load/serializable': { > types: { > import: './load/serializable.d.ts', > require: './load/serializable.d.cts', > default: './load/serializable.d.ts' > }, > import: './load/serializable.js', > require: './load/serializable.cjs' > }, > './agents': { > types: { > import: './agents.d.ts', > require: './agents.d.cts', > default: './agents.d.ts' > }, > import: './agents.js', > require: './agents.cjs' > }, > './agents/load': { > types: { > import: './agents/load.d.ts', > require: './agents/load.d.cts', > default: './agents/load.d.ts' > }, > import: './agents/load.js', > require: './agents/load.cjs' > }, > './agents/toolkits': { > types: { > import: './agents/toolkits.d.ts', > require: './agents/toolkits.d.cts', > default: './agents/toolkits.d.ts' > }, > import: './agents/toolkits.js', > require: './agents/toolkits.cjs' > }, > './agents/toolkits/sql': { > types: { > import: './agents/toolkits/sql.d.ts', > require: './agents/toolkits/sql.d.cts', > default: './agents/toolkits/sql.d.ts' > }, > import: './agents/toolkits/sql.js', > require: './agents/toolkits/sql.cjs' > }, > './agents/format\_scratchpad': { > types: { > import: './agents/format\_scratchpad.d.ts', > require: './agents/format\_scratchpad.d.cts', > default: './agents/format\_scratchpad.d.ts' > }, > import: './agents/format\_scratchpad.js', > require: './agents/format\_scratchpad.cjs' > }, > './agents/format\_scratchpad/openai\_tools': { > types: { > import: './agents/format\_scratchpad/openai\_tools.d.ts', > require: './agents/format\_scratchpad/openai\_tools.d.cts', > default: './agents/format\_scratchpad/openai\_tools.d.ts' > }, > import: './agents/format\_scratchpad/openai\_tools.js', > require: './agents/format\_scratchpad/openai\_tools.cjs' > }, > './agents/format\_scratchpad/log': { > types: { > import: './agents/format\_scratchpad/log.d.ts', > require: './agents/format\_scratchpad/log.d.cts', > default: './agents/format\_scratchpad/log.d.ts' > }, > import: './agents/format\_scratchpad/log.js', > require: './agents/format\_scratchpad/log.cjs' > }, > './agents/format\_scratchpad/xml': { > types: { > import: './agents/format\_scratchpad/xml.d.ts', > require: './agents/format\_scratchpad/xml.d.cts', > default: './agents/format\_scratchpad/xml.d.ts' > }, > import: './agents/format\_scratchpad/xml.js', > require: './agents/format\_scratchpad/xml.cjs' > }, > './agents/format\_scratchpad/log\_to\_message': { > types: { > import: './agents/format\_scratchpad/log\_to\_message.d.ts', > require: './agents/format\_scratchpad/log\_to\_message.d.cts', > default: './agents/format\_scratchpad/log\_to\_message.d.ts' > }, > import: './agents/format\_scratchpad/log\_to\_message.js', > require: './agents/format\_scratchpad/log\_to\_message.cjs' > }, > './agents/react/output\_parser': { > types: { > import: './agents/react/output\_parser.d.ts', > require: './agents/react/output\_parser.d.cts', > default: './agents/react/output\_parser.d.ts' > }, > import: './agents/react/output\_parser.js', > require: './agents/react/output\_parser.cjs' > }, > './agents/xml/output\_parser': { > types: { > import: './agents/xml/output\_parser.d.ts', > require: './agents/xml/output\_parser.d.cts', > default: './agents/xml/output\_parser.d.ts' > }, > import: './agents/xml/output\_parser.js', > require: './agents/xml/output\_parser.cjs' > }, > './agents/openai/output\_parser': { > types: { > import: './agents/openai/output\_parser.d.ts', > require: './agents/openai/output\_parser.d.cts', > default: './agents/openai/output\_parser.d.ts' > }, > import: './agents/openai/output\_parser.js', > require: './agents/openai/output\_parser.cjs' > }, > './tools': { > types: { > import: './tools.d.ts', > require: './tools.d.cts', > default: './tools.d.ts' > }, > import: './tools.js', > require: './tools.cjs' > }, > './tools/chain': { > types: { > import: './tools/chain.d.ts', > require: './tools/chain.d.cts', > default: './tools/chain.d.ts' > }, > import: './tools/chain.js', > require: './tools/chain.cjs' > }, > './tools/render': { > types: { > import: './tools/render.d.ts', > require: './tools/render.d.cts', > default: './tools/render.d.ts' > }, > import: './tools/render.js', > require: './tools/render.cjs' > }, > './tools/retriever': { > types: { > import: './tools/retriever.d.ts', > require: './tools/retriever.d.cts', > default: './tools/retriever.d.ts' > }, > import: './tools/retriever.js', > require: './tools/retriever.cjs' > }, > './tools/sql': { > types: { > import: './tools/sql.d.ts', > require: './tools/sql.d.cts', > default: './tools/sql.d.ts' > }, > import: './tools/sql.js', > require: './tools/sql.cjs' > }, > './tools/webbrowser': { > types: { > import: './tools/webbrowser.d.ts', > require: './tools/webbrowser.d.cts', > default: './tools/webbrowser.d.ts' > }, > import: './tools/webbrowser.js', > require: './tools/webbrowser.cjs' > }, > './chains': { > types: { > import: './chains.d.ts', > require: './chains.d.cts', > default: './chains.d.ts' > }, > import: './chains.js', > require: './chains.cjs' > }, > './chains/combine\_documents': { > types: { > import: './chains/combine\_documents.d.ts', > require: './chains/combine\_documents.d.cts', > default: './chains/combine\_documents.d.ts' > }, > import: './chains/combine\_documents.js', > require: './chains/combine\_documents.cjs' > }, > './chains/combine\_documents/reduce': { > types: { > import: './chains/combine\_documents/reduce.d.ts', > require: './chains/combine\_documents/reduce.d.cts', > default: './chains/combine\_documents/reduce.d.ts' > }, > import: './chains/combine\_documents/reduce.js', > require: './chains/combine\_documents/reduce.cjs' > }, > './chains/history\_aware\_retriever': { > types: { > import: './chains/history\_aware\_retriever.d.ts', > require: './chains/history\_aware\_retriever.d.cts', > default: './chains/history\_aware\_retriever.d.ts' > }, > import: './chains/history\_aware\_retriever.js', > require: './chains/history\_aware\_retriever.cjs' > }, > './chains/load': { > types: { > import: './chains/load.d.ts', > require: './chains/load.d.cts', > default: './chains/load.d.ts' > }, > import: './chains/load.js', > require: './chains/load.cjs' > }, > './chains/openai\_functions': { > types: { > import: './chains/openai\_functions.d.ts', > require: './chains/openai\_functions.d.cts', > default: './chains/openai\_functions.d.ts' > }, > import: './chains/openai\_functions.js', > require: './chains/openai\_functions.cjs' > }, > './chains/query\_constructor': { > types: { > import: './chains/query\_constructor.d.ts', > require: './chains/query\_constructor.d.cts', > default: './chains/query\_constructor.d.ts' > }, > import: './chains/query\_constructor.js', > require: './chains/query\_constructor.cjs' > }, > './chains/query\_constructor/ir': { > types: { > import: './chains/query\_constructor/ir.d.ts', > require: './chains/query\_constructor/ir.d.cts', > default: './chains/query\_constructor/ir.d.ts' > }, > import: './chains/query\_constructor/ir.js', > require: './chains/query\_constructor/ir.cjs' > }, > './chains/retrieval': { > types: { > import: './chains/retrieval.d.ts', > require: './chains/retrieval.d.cts', > default: './chains/retrieval.d.ts' > }, > import: './chains/retrieval.js', > require: './chains/retrieval.cjs' > }, > './chains/sql\_db': { > types: { > import: './chains/sql\_db.d.ts', > require: './chains/sql\_db.d.cts', > default: './chains/sql\_db.d.ts' > }, > import: './chains/sql\_db.js', > require: './chains/sql\_db.cjs' > }, > './chains/graph\_qa/cypher': { > types: { > import: './chains/graph\_qa/cypher.d.ts', > require: './chains/graph\_qa/cypher.d.cts', > default: './chains/graph\_qa/cypher.d.ts' > }, > import: './chains/graph\_qa/cypher.js', > require: './chains/graph\_qa/cypher.cjs' > }, > './chat\_models/universal': { > types: { > import: './chat\_models/universal.d.ts', > require: './chat\_models/universal.d.cts', > default: './chat\_models/universal.d.ts' > }, > import: './chat\_models/universal.js', > require: './chat\_models/universal.cjs' > }, > './embeddings/cache\_backed': { > types: { > import: './embeddings/cache\_backed.d.ts', > require: './embeddings/cache\_backed.d.cts', > default: './embeddings/cache\_backed.d.ts' > }, > import: './embeddings/cache\_backed.js', > require: './embeddings/cache\_backed.cjs' > }, > './embeddings/fake': { > types: { > import: './embeddings/fake.d.ts', > require: './embeddings/fake.d.cts', > default: './embeddings/fake.d.ts' > }, > import: './embeddings/fake.js', > require: './embeddings/fake.cjs' > }, > './vectorstores/memory': { > types: { > import: './vectorstores/memory.d.ts', > require: './vectorstores/memory.d.cts', > default: './vectorstores/memory.d.ts' > }, > import: './vectorstores/memory.js', > require: './vectorstores/memory.cjs' > }, > './text\_splitter': { > types: { > import: './text\_splitter.d.ts', > require: './text\_splitter.d.cts', > default: './text\_splitter.d.ts' > }, > import: './text\_splitter.js', > require: './text\_splitter.cjs' > }, > './memory': { > types: { > import: './memory.d.ts', > require: './memory.d.cts', > default: './memory.d.ts' > }, > import: './memory.js', > require: './memory.cjs' > }, > './memory/chat\_memory': { > types: { > import: './memory/chat\_memory.d.ts', > require: './memory/chat\_memory.d.cts', > default: './memory/chat\_memory.d.ts' > }, > import: './memory/chat\_memory.js', > require: './memory/chat\_memory.cjs' > }, > './document': { > types: { > import: './document.d.ts', > require: './document.d.cts', > default: './document.d.ts' > }, > import: './document.js', > require: './document.cjs' > }, > './document\_loaders/base': { > types: { > import: './document\_loaders/base.d.ts', > require: './document\_loaders/base.d.cts', > default: './document\_loaders/base.d.ts' > }, > import: './document\_loaders/base.js', > require: './document\_loaders/base.cjs' > }, > './document\_loaders/fs/buffer': { > types: { > import: './document\_loaders/fs/buffer.d.ts', > require: './document\_loaders/fs/buffer.d.cts', > default: './document\_loaders/fs/buffer.d.ts' > }, > import: './document\_loaders/fs/buffer.js', > require: './document\_loaders/fs/buffer.cjs' > }, > './document\_loaders/fs/directory': { > types: { > import: './document\_loaders/fs/directory.d.ts', > require: './document\_loaders/fs/directory.d.cts', > default: './document\_loaders/fs/directory.d.ts' > }, > import: './document\_loaders/fs/directory.js', > require: './document\_loaders/fs/directory.cjs' > }, > './document\_loaders/fs/json': { > types: { > import: './document\_loaders/fs/json.d.ts', > require: './document\_loaders/fs/json.d.cts', > default: './document\_loaders/fs/json.d.ts' > }, > import: './document\_loaders/fs/json.js', > require: './document\_loaders/fs/json.cjs' > }, > './document\_loaders/fs/multi\_file': { > types: { > import: './document\_loaders/fs/multi\_file.d.ts', > require: './document\_loaders/fs/multi\_file.d.cts', > default: './document\_loaders/fs/multi\_file.d.ts' > }, > import: './document\_loaders/fs/multi\_file.js', > require: './document\_loaders/fs/multi\_file.cjs' > }, > './document\_loaders/fs/text': { > types: { > import: './document\_loaders/fs/text.d.ts', > require: './document\_loaders/fs/text.d.cts', > default: './document\_loaders/fs/text.d.ts' > }, > import: './document\_loaders/fs/text.js', > require: './document\_loaders/fs/text.cjs' > }, > './document\_transformers/openai\_functions': { > types: { > import: './document\_transformers/openai\_functions.d.ts', > require: './document\_transformers/openai\_functions.d.cts', > default: './document\_transformers/openai\_functions.d.ts' > }, > import: './document\_transformers/openai\_functions.js', > require: './document\_transformers/openai\_functions.cjs' > }, > './sql\_db': { > types: { > import: './sql\_db.d.ts', > require: './sql\_db.d.cts', > default: './sql\_db.d.ts' > }, > import: './sql\_db.js', > require: './sql\_db.cjs' > }, > './callbacks': { > types: { > import: './callbacks.d.ts', > require: './callbacks.d.cts', > default: './callbacks.d.ts' > }, > import: './callbacks.js', > require: './callbacks.cjs' > }, > './output\_parsers': { > types: { > import: './output\_parsers.d.ts', > require: './output\_parsers.d.cts', > default: './output\_parsers.d.ts' > }, > import: './output\_parsers.js', > require: './output\_parsers.cjs' > }, > './output\_parsers/expression': { > types: { > import: './output\_parsers/expression.d.ts', > require: './output\_parsers/expression.d.cts', > default: './output\_parsers/expression.d.ts' > }, > import: './output\_parsers/expression.js', > require: './output\_parsers/expression.cjs' > }, > './retrievers/contextual\_compression': { > types: { > import: './retrievers/contextual\_compression.d.ts', > require: './retrievers/contextual\_compression.d.cts', > default: './retrievers/contextual\_compression.d.ts' > }, > import: './retrievers/contextual\_compression.js', > require: './retrievers/contextual\_compression.cjs' > }, > './retrievers/document\_compressors': { > types: { > import: './retrievers/document\_compressors.d.ts', > require: './retrievers/document\_compressors.d.cts', > default: './retrievers/document\_compressors.d.ts' > }, > import: './retrievers/document\_compressors.js', > require: './retrievers/document\_compressors.cjs' > }, > './retrievers/ensemble': { > types: { > import: './retrievers/ensemble.d.ts', > require: './retrievers/ensemble.d.cts', > default: './retrievers/ensemble.d.ts' > }, > import: './retrievers/ensemble.js', > require: './retrievers/ensemble.cjs' > }, > './retrievers/multi\_query': { > types: { > import: './retrievers/multi\_query.d.ts', > require: './retrievers/multi\_query.d.cts', > default: './retrievers/multi\_query.d.ts' > }, > import: './retrievers/multi\_query.js', > require: './retrievers/multi\_query.cjs' > }, > './retrievers/multi\_vector': { > types: { > import: './retrievers/multi\_vector.d.ts', > require: './retrievers/multi\_vector.d.cts', > default: './retrievers/multi\_vector.d.ts' > }, > import: './retrievers/multi\_vector.js', > require: './retrievers/multi\_vector.cjs' > }, > './retrievers/parent\_document': { > types: { > import: './retrievers/parent\_document.d.ts', > require: './retrievers/parent\_document.d.cts', > default: './retrievers/parent\_document.d.ts' > }, > import: './retrievers/parent\_document.js', > require: './retrievers/parent\_document.cjs' > }, > './retrievers/time\_weighted': { > types: { > import: './retrievers/time\_weighted.d.ts', > require: './retrievers/time\_weighted.d.cts', > default: './retrievers/time\_weighted.d.ts' > }, > import: './retrievers/time\_weighted.js', > require: './retrievers/time\_weighted.cjs' > }, > './retrievers/document\_compressors/chain\_extract': { > types: { > import: './retrievers/document\_compressors/chain\_extract.d.ts', > require: './retrievers/document\_compressors/chain\_extract.d.cts', > default: './retrievers/document\_compressors/chain\_extract.d.ts' > }, > import: './retrievers/document\_compressors/chain\_extract.js', > require: './retrievers/document\_compressors/chain\_extract.cjs' > }, > './retrievers/document\_compressors/embeddings\_filter': { > types: { > import: './retrievers/document\_compressors/embeddings\_filter.d.ts', > require: './retrievers/document\_compressors/embeddings\_filter.d.cts', > default: './retrievers/document\_compressors/embeddings\_filter.d.ts' > }, > import: './retrievers/document\_compressors/embeddings\_filter.js', > require: './retrievers/document\_compressors/embeddings\_filter.cjs' > }, > './retrievers/hyde': { > types: { > import: './retrievers/hyde.d.ts', > require: './retrievers/hyde.d.cts', > default: './retrievers/hyde.d.ts' > }, > import: './retrievers/hyde.js', > require: './retrievers/hyde.cjs' > }, > './retrievers/score\_threshold': { > types: { > import: './retrievers/score\_threshold.d.ts', > require: './retrievers/score\_threshold.d.cts', > default: './retrievers/score\_threshold.d.ts' > }, > import: './retrievers/score\_threshold.js', > require: './retrievers/score\_threshold.cjs' > }, > './retrievers/self\_query': { > types: { > import: './retrievers/self\_query.d.ts', > require: './retrievers/self\_query.d.cts', > default: './retrievers/self\_query.d.ts' > }, > import: './retrievers/self\_query.js', > require: './retrievers/self\_query.cjs' > }, > './retrievers/self\_query/functional': { > types: { > import: './retrievers/self\_query/functional.d.ts', > require: './retrievers/self\_query/functional.d.cts', > default: './retrievers/self\_query/functional.d.ts' > }, > import: './retrievers/self\_query/functional.js', > require: './retrievers/self\_query/functional.cjs' > }, > './retrievers/matryoshka\_retriever': { > types: { > import: './retrievers/matryoshka\_retriever.d.ts', > require: './retrievers/matryoshka\_retriever.d.cts', > default: './retrievers/matryoshka\_retriever.d.ts' > }, > import: './retrievers/matryoshka\_retriever.js', > require: './retrievers/matryoshka\_retriever.cjs' > }, > './cache/file\_system': { > types: { > import: './cache/file\_system.d.ts', > require: './cache/file\_system.d.cts', > default: './cache/file\_system.d.ts' > }, > import: './cache/file\_system.js', > require: './cache/file\_system.cjs' > }, > './stores/doc/base': { > types: { > import: './stores/doc/base.d.ts', > require: './stores/doc/base.d.cts', > default: './stores/doc/base.d.ts' > }, > import: './stores/doc/base.js', > require: './stores/doc/base.cjs' > }, > './stores/doc/in\_memory': { > types: { > import: './stores/doc/in\_memory.d.ts', > require: './stores/doc/in\_memory.d.cts', > default: './stores/doc/in\_memory.d.ts' > }, > import: './stores/doc/in\_memory.js', > require: './stores/doc/in\_memory.cjs' > }, > './stores/file/in\_memory': { > types: { > import: './stores/file/in\_memory.d.ts', > require: './stores/file/in\_memory.d.cts', > default: './stores/file/in\_memory.d.ts' > }, > import: './stores/file/in\_memory.js', > require: './stores/file/in\_memory.cjs' > }, > './stores/file/node': { > types: { > import: './stores/file/node.d.ts', > require: './stores/file/node.d.cts', > default: './stores/file/node.d.ts' > }, > import: './stores/file/node.js', > require: './stores/file/node.cjs' > }, > './stores/message/in\_memory': { > types: { > import: './stores/message/in\_memory.d.ts', > require: './stores/message/in\_memory.d.cts', > default: './stores/message/in\_memory.d.ts' > }, > import: './stores/message/in\_memory.js', > require: './stores/message/in\_memory.cjs' > }, > './storage/encoder\_backed': { > types: { > import: './storage/encoder\_backed.d.ts', > require: './storage/encoder\_backed.d.cts', > default: './storage/encoder\_backed.d.ts' > }, > import: './storage/encoder\_backed.js', > require: './storage/encoder\_backed.cjs' > }, > './storage/in\_memory': { > types: { > import: './storage/in\_memory.d.ts', > require: './storage/in\_memory.d.cts', > default: './storage/in\_memory.d.ts' > }, > import: './storage/in\_memory.js', > require: './storage/in\_memory.cjs' > }, > './storage/file\_system': { > types: { > import: './storage/file\_system.d.ts', > require: './storage/file\_system.d.cts', > default: './storage/file\_system.d.ts' > }, > import: './storage/file\_system.js', > require: './storage/file\_system.cjs' > }, > './hub': { > types: { > import: './hub.d.ts', > require: './hub.d.cts', > default: './hub.d.ts' > }, > import: './hub.js', > require: './hub.cjs' > }, > './hub/node': { > types: { > import: './hub/node.d.ts', > require: './hub/node.d.cts', > default: './hub/node.d.ts' > }, > import: './hub/node.js', > require: './hub/node.cjs' > }, > './util/document': { > types: { > import: './util/document.d.ts', > require: './util/document.d.cts', > default: './util/document.d.ts' > }, > import: './util/document.js', > require: './util/document.cjs' > }, > './util/math': { > types: { > import: './util/math.d.ts', > require: './util/math.d.cts', > default: './util/math.d.ts' > }, > import: './util/math.js', > require: './util/math.cjs' > }, > './util/time': { > types: { > import: './util/time.d.ts', > require: './util/time.d.cts', > default: './util/time.d.ts' > }, > import: './util/time.js', > require: './util/time.cjs' > }, > './experimental/autogpt': { > types: { > import: './experimental/autogpt.d.ts', > require: './experimental/autogpt.d.cts', > default: './experimental/autogpt.d.ts' > }, > import: './experimental/autogpt.js', > require: './experimental/autogpt.cjs' > }, > './experimental/openai\_assistant': { > types: { > import: './experimental/openai\_assistant.d.ts', > require: './experimental/openai\_assistant.d.cts', > default: './experimental/openai\_assistant.d.ts' > }, > import: './experimental/openai\_assistant.js', > require: './experimental/openai\_assistant.cjs' > }, > './experimental/openai\_files': { > types: { > import: './experimental/openai\_files.d.ts', > require: './experimental/openai\_files.d.cts', > default: './experimental/openai\_files.d.ts' > }, > import: './experimental/openai\_files.js', > require: './experimental/openai\_files.cjs' > }, > './experimental/babyagi': { > types: { > import: './experimental/babyagi.d.ts', > require: './experimental/babyagi.d.cts', > default: './experimental/babyagi.d.ts' > }, > import: './experimental/babyagi.js', > require: './experimental/babyagi.cjs' > }, > './experimental/generative\_agents': { > types: { > import: './experimental/generative\_agents.d.ts', > require: './experimental/generative\_agents.d.cts', > default: './experimental/generative\_agents.d.ts' > }, > import: './experimental/generative\_agents.js', > require: './experimental/generative\_agents.cjs' > }, > './experimental/plan\_and\_execute': { > types: { > import: './experimental/plan\_and\_execute.d.ts', > require: './experimental/plan\_and\_execute.d.cts', > default: './experimental/plan\_and\_execute.d.ts' > }, > import: './experimental/plan\_and\_execute.js', > require: './experimental/plan\_and\_execute.cjs' > }, > './experimental/chains/violation\_of\_expectations': { > types: { > import: './experimental/chains/violation\_of\_expectations.d.ts', > require: './experimental/chains/violation\_of\_expectations.d.cts', > default: './experimental/chains/violation\_of\_expectations.d.ts' > }, > import: './experimental/chains/violation\_of\_expectations.js', > require: './experimental/chains/violation\_of\_expectations.cjs' > }, > './experimental/masking': { > types: { > import: './experimental/masking.d.ts', > require: './experimental/masking.d.cts', > default: './experimental/masking.d.ts' > }, > import: './experimental/masking.js', > require: './experimental/masking.cjs' > }, > './experimental/prompts/custom\_format': { > types: { > import: './experimental/prompts/custom\_format.d.ts', > require: './experimental/prompts/custom\_format.d.cts', > default: './experimental/prompts/custom\_format.d.ts' > }, > import: './experimental/prompts/custom\_format.js', > require: './experimental/prompts/custom\_format.cjs' > }, > './experimental/prompts/handlebars': { > types: { > import: './experimental/prompts/handlebars.d.ts', > require: './experimental/prompts/handlebars.d.cts', > default: './experimental/prompts/handlebars.d.ts' > }, > import: './experimental/prompts/handlebars.js', > require: './experimental/prompts/handlebars.cjs' > }, > './evaluation': { > types: { > import: './evaluation.d.ts', > require: './evaluation.d.cts', > default: './evaluation.d.ts' > }, > import: './evaluation.js', > require: './evaluation.cjs' > }, > './smith': { > types: { > import: './smith.d.ts', > require: './smith.d.cts', > default: './smith.d.ts' > }, > import: './smith.js', > require: './smith.cjs' > }, > './runnables/remote': { > types: { > import: './runnables/remote.d.ts', > require: './runnables/remote.d.cts', > default: './runnables/remote.d.ts' > }, > import: './runnables/remote.js', > require: './runnables/remote.cjs' > }, > './indexes': { > types: { > import: './indexes.d.ts', > require: './indexes.d.cts', > default: './indexes.d.ts' > }, > import: './indexes.js', > require: './indexes.cjs' > }, > './schema/query\_constructor': { > types: { > import: './schema/query\_constructor.d.ts', > require: './schema/query\_constructor.d.cts', > default: './schema/query\_constructor.d.ts' > }, > import: './schema/query\_constructor.js', > require: './schema/query\_constructor.cjs' > }, > './schema/prompt\_template': { > types: { > import: './schema/prompt\_template.d.ts', > require: './schema/prompt\_template.d.cts', > default: './schema/prompt\_template.d.ts' > }, > import: './schema/prompt\_template.js', > require: './schema/prompt\_template.cjs' > }, > './package.json': './package.json' > }, > gitHead: 'eae9a629ccbffe7a3887ac66fcc4480954980d5d', > dist: { > integrity: 'sha512-OkPstP43L3rgaAk72UAVcXy4BzJSiyzXfJsHRBTx9xD3rRtgrAu/jsWpMcsbFAoNO3iGerK+ULzkTzaBJBz6kg==', > shasum: '66c859a10aacaf04ed864f2b219a128887c19f56', > tarball: 'https://registry.npmjs.org/langchain/-/langchain-0.3.35.tgz', > fileCount: 1345, > unpackedSize: 2929800, > signatures: \[ > { > keyid: 'SHA256:DhQ8wR5APBvFHLF/+Tc+AYvPOdTpcIDqOhxsBHRwC7U', > sig: 'MEUCIQCbzdn98bWrj2qUFDuvpSARWgtbSBt+Zqnot+XARvOBNgIgf5tcZtcah5g1m854KeYjpMzGgCX/42VefySP0CrxZY4=' > } > \] > }, > directories: {} > } > Done in 0.65s. > \`\`\` > > \`\`\` > Platform: Windows > \`\`\` > > \`\`\` > $ node -v > v22.14.0 > \`\`\` > > \`\`\` > $ yarn -v > 1.22.22 > \`\`\` ---
**Author:** ![pawel-twardziak](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.langchain.com/pawel-twardziak/32/960_2.png) [@pawel-twardziak](https://forum.langchain.com/u/pawel-twardziak)\ **Post date:** [September 30, 2025, 8:36pm UTC](https://forum.langchain.com/t/langchain-js-openai-responses-api-stateless-gpt-5-reasoning-messages-cause-400-reasoning-without-its-required-following-item/1688/7 "2025-09-30T20:36:03Z")
Hi @hntrl and @niccotnt I’ve raised a PR - there was an inconsistency in pairing the `reasoning item` with the following message. > > > Fixes #9072 > > \#### Goal > > Fix Responses API pairing error for reasoning → “re…quired following item” and add unit tests that cover it. > > \#### Changes: > > \- In libs/langchain-openai/src/chat\_models.ts: > - For the Responses API when !zdrEnabled, attach the id to function\_call items using the \_\_openai\_function\_call\_ids\_\_ map. This allows the API to correctly pair a preceding reasoning item with its required following item. > - The logic for adding reasoning in history remains unchanged from the state prior to this iteration (no gating, as requested). > \- Tests (unit, .standard.test.ts): > - Added libs/langchain-openai/src/tests/chat\_models\_responses\_reasoning\_pairing.standard.test.ts: > - “includes function\_call id when !zdrEnabled so reasoning can pair” > - “does not include function\_call id when zdrEnabled=true (and reasoning omitted)” > - “errors when orphan reasoning is sent without following item” (negative scenario: if a reasoning item lacks its required following item, we expect an error) > - The filename follows the existing chat\_models... convention to clearly scope the test to chat models. > > \#### Rationale: > > The Responses API requires that a reasoning item must be immediately followed by (and paired with) another item via id. Missing id on function\_call broke validation and resulted in a 400 error. > > \#### Impact scope: > \- Only affects the Responses API path and conversation history containing reasoning + function\_call. > \- No changes to the Completions API. > > \#### Local testing: > > \- Unit only: yarn test:single libs/langchain-openai/src/tests/chat\_models\_responses\_reasoning\_pairing.standard.test.ts > \- All unit tests: yarn test > > \#### Documentation: > > N/A (no public API change).