> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tigyai.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Knowledge Base

> Upload documents that your voice agent can reference during live conversations.

The Knowledge Base lets your voice agents retrieve relevant information from uploaded documents during conversations.

## How it works

1. Upload a PDF, DOCX, TXT, or JSON document.
2. Tig.ai splits and indexes the document into searchable chunks.
3. Attach the processed document to one or more Start Call or Agent nodes.
4. During a call, the agent retrieves relevant chunks to answer the caller.

## Supported file types

| Format | Extension       |
| ------ | --------------- |
| PDF    | `.pdf`          |
| Word   | `.docx`, `.doc` |
| Text   | `.txt`          |
| JSON   | `.json`         |

Maximum file size: **5 MB**.

## Upload and attach documents

1. Open **Knowledge Base Files** in the dashboard.
2. Click **Upload New** or drag and drop a file.
3. Click **Upload & Process**. Tig.ai automatically chunks and indexes the document.
4. Open a Start Call or Agent node and select the document under **Knowledge Base Documents**.

The agent searches only the documents attached to the current node. Attach focused, relevant documents to improve retrieval quality.

## Best practices

* Keep documents focused on a single topic.
* Use clear headings, lists, and short paragraphs.
* Keep source documents up to date.
* Attach only the documents relevant to each conversation stage.