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documented known limitations when using respond to chat as a tool (#3992)

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Co-authored-by: Kartik Balasubramanian <22399046+HumanistSerif@users.noreply.github.com>
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David Arens
2025-12-08 21:18:44 +01:00
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docs/integrations/builtin/core-nodes/n8n-nodes-langchain.respondtochat.md
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# Respond to Chat node
Use the Respond to Chat node in correspondence with the [Chat Trigger](/integrations/builtin/core-nodes/n8n-nodes-langchain.chattrigger/index.md) node to send a response into the chat and optionally wait for a response from the user. This allows you to have multiple chat interactions within a single execution and enables human-in-the-loop use cases in the chat.
Use the Respond to Chat node in correspondence with the [Chat Trigger](/integrations/builtin/core-nodes/n8n-nodes-langchain.chattrigger/index.md) node to send a response into the chat and optionally wait for a response from the user. This allows you to have multiple chat interactions within a single execution and enables human-in-the-loop use cases in the chat. The Respond to Chat node also works as a tool for AI Agents.
/// note | Chat Trigger node
The Respond to Chat node requires a [Chat Trigger](/integrations/builtin/core-nodes/n8n-nodes-langchain.chattrigger/index.md) node to be present in the workflow, with the [Response Mode](/integrations/builtin/core-nodes/n8n-nodes-langchain.chattrigger/index.md#response-mode) set to 'Using Response Nodes'.
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## Common issues
For common questions or issues and suggested solutions, refer to [Common Issues](/integrations/builtin/core-nodes/n8n-nodes-langchain.chattrigger/common-issues.md).
- The Respond to Chat node does not work when used as a tool of a subagent.
- The Respond to Chat node does not work when used in a subworkflow. This includes usage in a subworkflow that's being used as a tool for an AI Agent.
For common questions or issues and suggested solutions with the Chat Trigger node, refer to [Common Chat Trigger Node Issues](/integrations/builtin/core-nodes/n8n-nodes-langchain.chattrigger/common-issues.md).