Automation library · Documents and files

Telegram AI chatbot with OpenAI and PGVector RAG

Started by someone opening a chat with it, and works across Google Drive and Postgres. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 24 steps, 1 loop or waits: large, and worth reading before you trust it with anything live.

LargeCalls a model: OpenAIRetrieval

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24 stepsLarge: read it before trusting it with anything live
0Branches: places the flow splits
1Loop or waits
2Services it connects to

The flow

Starts it 4Model 11Logic 6Service 3

The steps in the order they run, from what starts it.

  1. 1OpenAI Chat ModelLm Chat Open AiModel
  2. 2Embeddings OpenAI1Embeddings Open AiModel
  3. 3File CreatedGoogle Drive triggerStarts it
  4. 4File UpdatedGoogle Drive triggerStarts it
  5. 5Recursive Character Text SplitterText Splitter Recursive Character Text SplitterModel
  6. 6When chat message receivedChat triggerStarts it
  7. 7OpenAI Chat Model3Lm Chat Open AiModel
  8. 8When Executed by Another WorkflowExecute Workflow triggerStarts it
  9. 9EmbeddingsEmbeddings Open AiModel
  10. 10Chat MemoryMemory Postgres ChatModel
  11. 11RAG AI AgentAgentModel
  12. 12Postgres PGVector StoreVector Store PGVectorModel
  13. 13Loop Over ItemsSplit In BatchesLogic
  14. 14Default Data LoaderDocument Default Data LoaderModel
  15. 15Generate Contextual TextChain LlmModel
  16. 16TestDataSetLogic
  17. 17Docs RAG ToolVector Store PGVectorModel
  18. 18Set File IDSetLogic
  19. 19Get ValuesSetLogic
  20. 20Delete Old Doc RecordsPostgresService
  21. 21Download FileGoogle DriveService
  22. 22Extract Document TextExtract From FileService
  23. 23Create Chunks From DocCodeLogic
  24. 24Chunks To ListSplit OutLogic

How it's built

Starts on
Someone opening a chat with it
Steps
24, 1 loop or waits
Size
Large: read it before trusting it with anything live
Connects to
Google Drive, Postgres
Model
OpenAI
Retrieval
Answers are drawn from documents you supply, not from the model alone

Questions

What does it need to run?

An n8n account, plus your own Google Drive and Postgres accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on someone opening a chat with it.

Does it use AI?

Yes. It calls OpenAI. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Take your time. At 24 steps it is large: read it before trusting it with anything live.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 24 steps before you point it at anything that matters.