Node reference

Attachment nodes

Attachments change what an AI node knows. Flux ships three: GPT Memory, Gemini Memory and Knowledge Base.

Memory

Without a memory attachment, every message is the model's first. It cannot resolve "and what about tomorrow?", because it has never seen what came before.

Attaching memory carries the conversation through the session, so the agent follows references back to earlier turns.

Use the memory that matches the model: GPT Memory with a GPT Model node, Gemini Memory with a Gemini Model node.

A GPT Model node with a GPT Memory attachment and a Knowledge Base attachment connected below it

Screenshot to be added

Memory carries the conversation; a knowledge base carries your documents.

The cost of memory

Conversation history is sent to the model on every call, so a long conversation costs more per message than a short one. That is normal and worth knowing when you read token usage — cost per session grows with conversation length, not with how many nodes you drew.

Knowledge Base

Attach documents and the agent answers from your material rather than from what the model happens to know. This is what makes a support bot useful: it knows your product, your policies and your pricing.

Documents are uploaded as knowledge files on the attachment node, and the AI node consults them when answering.

Knowledge Base or QnA tool?

	Knowledge Base	QnA tool
Shape	Documents	Defined question and answer pairs
Attached to	The attachment connector	The tool connector
Answers	Phrased by the model from your material	Close to what you wrote
Best for	Broad coverage — manuals, policies, guides	The handful that must be exact

They combine well: a knowledge base for the long tail, plus a QnA tool for the answers that carry commercial or legal weight.

A knowledge base is only as current as its documents. When the policy changes, the upload has to change too — otherwise the agent will keep confidently quoting last year's terms.

Grounding the agent

Attaching a knowledge base does not stop a model inventing things. Say so in the system prompt as well:

Answer only from the attached knowledge base. If it does not contain the answer, say you do not know and call the transfer tool.