> AI agents: this is one page from PostHog's docs. Full index of Markdown docs for LLMs: https://posthog.com/llms.txt

# Business knowledge

Canonical URL: https://posthog.com/docs/business-knowledge/start

## On this page

- [Text](#text)
- [URL](#url)
- [File](#file)
- [Auto-refresh](#auto-refresh)
- [Libraries](#libraries)
- [Playground](#playground)
- [Content checks](#content-checks)
- [Learn from support](#learn-from-support)

Business knowledge stores the facts PostHog uses when it answers questions about your business. PostHog AI, Support, and the Business knowledge MCP tools all read the same sources.

Open **Business knowledge** and choose **Add source**.

## Text

Paste a policy, an FAQ, or any other text, and give the source a name. Edit the source when the text changes.

## URL

Paste a public URL and choose how PostHog should read it.

-   **Single page** fetches that page.
-   **Sitemap.xml** reads the sitemap at that URL, or `/sitemap.xml` on the same site, and indexes each listed page.
-   **Same-origin crawl** indexes that page and other pages on the same site, staying under the page's path. A URL at the site root covers the whole site. Skip paths you do not want. Depth and max pages bound the crawl. The crawl follows `robots.txt`.

## File

Upload a PDF, DOCX, Markdown, CSV, or plain text file. PostHog stores the text it reads from the file. It does not keep the original file. To change a file, delete the source and upload it again.

## Auto-refresh

A URL source can refresh on a schedule: every hour, every 6 hours, every day, or every week. **Manual only** means PostHog fetches the source when you add it, and again when you refresh that row yourself.

Text and file sources do not refresh on a schedule.

## Libraries

A library limits search to the sources and repositories you put in it. A source can be in more than one library, or in none. **All** searches every ready source. **Unfiled** shows sources that are in no library.

Deleting a library removes only that grouping. The sources, documents, and selected repositories stay.

Pass `library_id` to document search, repository search, and file read when you want one library. Leave it out to search the whole project.

## Playground

The **Playground** tab asks a question against your sources and shows the answer. Use it to check that a source is found before you rely on it in Support or PostHog AI.

## Content checks

PostHog checks each document before using it in an answer. A document marked unsafe is left out. A document is also left out until that check finishes. The source shows when it has unsafe content.

## Learn from support

You can also let PostHog add reusable answers from resolved support tickets. See [Learn from support](https://posthog.com/docs/business-knowledge/learn-from-support.md).