AI-Powered Document Chat with Nextcloud Files using LangChain and OpenAI

Main Workflow “AI Nextcloud” Entry point: A public chat-trigger greets the user; every incoming chat message starts the flow. AI agent: A LangChain agent (“AI Nextcloud”) uses the configured OpenAI model plus short-term memory to continue the dialogue in context. Purpose: Answers questions about files stored in a Nextcloud folder. The user simply includes the folder path in their question. Tool integration: Calls the sub-workflow “Nextcloud Tool” whenever it needs to read files and pass their text back to the AI. Sub-Workflow “Nextcloud Tool” Invocation: Triggered by other workflows with the input parameter path (folder path). File listing: Retrieves every file in the specified folder via th

Help me set up the n8n workflow "AI-Powered Document Chat with Nextcloud Files using LangChain and OpenAI" (https://n8n.io/workflows/4465). It uses: Nextcloud, Code, AI Agent, OpenAI Chat Model, Simple Memory, Call n8n Workflow Tool. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.