> ## Documentation Index
> Fetch the complete documentation index at: https://botpress-charmenta-pr-700.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Built-in variables

Botpress provides several **built-in variables** that contain useful information about the current state of your bot. You don't need to create these variables yourself—you can just read them whenever you need them.

Here's a list of all the built-in variables in Botpress:

| Path                                                                            | Type        | Description                                                                                                                                                                                                                                                |
| ------------------------------------------------------------------------------- | ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `event.preview`                                                                 | Event       | The last message sent by the user. It will be replaced every time there is a new message.                                                                                                                                                                  |
| `conversation.SummaryAgent.summary`                                             | Agent       | Summary of the conversation created by the [Summary Agent](/studio/concepts/agents/summary-agent). It's an explanation of what happened.                                                                                                                   |
| `conversation.SummaryAgent.transcript`                                          | Agent       | Transcript of the conversation going back a certain amount of turns.                                                                                                                                                                                       |
| `turn.KnowledgeAgent.answer`                                                    | Agent       | The answer provided by the [Knowledge Agent](/studio/concepts/agents/knowledge-agent)                                                                                                                                                                      |
| `turn.KnowledgeAgent.responded`                                                 | Agent       | Whether the Knowledge Agent has responded automatically to a user question. Its value will be `true` or `false`                                                                                                                                            |
| `turn.KnowledgeAgent?.answer?.length`                                           | Agent       | The amount of characters in the Knowledge answer. Use this in an [Expression](/studio/concepts/cards/flow-logic#expression) to check if there is an answer in the KB. Optionally add `!` to start of the code in order to check if there WASN'T an answer. |
| `turn.KnowledgeAgent.citations`                                                 | Agent       | A list of citations for the Knowledge answer.                                                                                                                                                                                                              |
| `user.TranslatorAgent.language`                                                 | Agent       | The current user language code in ISO 639-1 format. [More about the Translator Agent](/studio/concepts/agents/translator-agent)                                                                                                                            |
| `user.TranslatorAgent.language = 'en'`                                          | Agent       | This code snippet set's the user language to English. Replace with any language code in the ISO 639-1 format                                                                                                                                               |
| `event.kb.results.map((a) => a.dsFriendlyName + '\n' + a.content).join('\n\n')` | Event       | This code snippet returns the raw content that generated the final Knowledge answer.                                                                                                                                                                       |
| `event.tags.conversation['whatsapp:userPhone']`                                 | Integration | The user's phone number on WhatsApp. Includes the international code.                                                                                                                                                                                      |
| `event.tags.conversation['whatsapp:phoneNumberId']`                             | Integration | The phone number ID of the bot on WhatsApp.                                                                                                                                                                                                                |