These docs are for version 1.x of Rasa Open Source.

### User Guide

- [Installation](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/installation/)
- [Tutorial: Rasa Basics](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/rasa-tutorial/)
- [Tutorial: Building Assistants](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/building-assistants/)
- [Command Line Interface](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/command-line-interface/)
- [Architecture](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/architecture/)
- [Messaging and Voice Channels](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/messaging-and-voice-channels/)
- [Testing Your Assistant](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/testing-your-assistant/)
- [Setting up CI/CD](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/setting-up-ci-cd/)
- [Validate Data](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/validate-files/)
- [Configuring the HTTP API](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/configuring-http-api/)
- [Deploying Your Rasa Assistant](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/how-to-deploy/)
- [Cloud Storage](https://legacy-docs-v1.rasa.com/1.10.2/user-guide/cloud-storage/)

### NLU

- [About](https://legacy-docs-v1.rasa.com/1.10.2/nlu/about/)
- [Using NLU Only](https://legacy-docs-v1.rasa.com/1.10.2/nlu/using-nlu-only/)
- [Training Data Format](https://legacy-docs-v1.rasa.com/1.10.2/nlu/training-data-format/)
- [Language Support](https://legacy-docs-v1.rasa.com/1.10.2/nlu/language-support/)
- [Choosing a Pipeline](https://legacy-docs-v1.rasa.com/1.10.2/nlu/choosing-a-pipeline/)
- [Components](https://legacy-docs-v1.rasa.com/1.10.2/nlu/components/)
- [Entity Extraction](https://legacy-docs-v1.rasa.com/1.10.2/nlu/entity-extraction/)

### Core

- [About](https://legacy-docs-v1.rasa.com/1.10.2/core/about/)
- [Stories](https://legacy-docs-v1.rasa.com/1.10.2/core/stories/)
- [Domains](https://legacy-docs-v1.rasa.com/1.10.2/core/domains/)
- [Responses](https://legacy-docs-v1.rasa.com/1.10.2/core/responses/)
- [Actions](https://legacy-docs-v1.rasa.com/1.10.2/core/actions/#)
- [Reminders and External Events](https://legacy-docs-v1.rasa.com/1.10.2/core/reminders-and-external-events/)
- [Policies](https://legacy-docs-v1.rasa.com/1.10.2/core/policies/)
- [Slots](https://legacy-docs-v1.rasa.com/1.10.2/core/slots/)
- [Forms](https://legacy-docs-v1.rasa.com/1.10.2/core/forms/)
- [Retrieval Actions](https://legacy-docs-v1.rasa.com/1.10.2/core/retrieval-actions/)
- [Interactive Learning](https://legacy-docs-v1.rasa.com/1.10.2/core/interactive-learning/)
- [Fallback Actions](https://legacy-docs-v1.rasa.com/1.10.2/core/fallback-actions/)
- [Knowledge Base Actions](https://legacy-docs-v1.rasa.com/1.10.2/core/knowledge-bases/)

### Conversation Design

- [Dialogue Elements](https://legacy-docs-v1.rasa.com/1.10.2/dialogue-elements/dialogue-elements/)
- [Small Talk](https://legacy-docs-v1.rasa.com/1.10.2/dialogue-elements/small-talk/)
- [Completing Tasks](https://legacy-docs-v1.rasa.com/1.10.2/dialogue-elements/completing-tasks/)
- [Guiding Users](https://legacy-docs-v1.rasa.com/1.10.2/dialogue-elements/guiding-users/)

### API Reference

- [Action Server](https://legacy-docs-v1.rasa.com/1.10.2/api/action-server/)
- [HTTP API](https://legacy-docs-v1.rasa.com/1.10.2/api/http-api/)
- [Jupyter Notebooks](https://legacy-docs-v1.rasa.com/1.10.2/api/jupyter-notebooks/)
- [Agent](https://legacy-docs-v1.rasa.com/1.10.2/api/agent/)
- [Custom NLU Components](https://legacy-docs-v1.rasa.com/1.10.2/api/custom-nlu-components/)
- [Rasa SDK](https://legacy-docs-v1.rasa.com/1.10.2/api/rasa-sdk/)
- [Events](https://legacy-docs-v1.rasa.com/1.10.2/api/events/)
- [Tracker](https://legacy-docs-v1.rasa.com/1.10.2/api/tracker/)
- [Tracker Stores](https://legacy-docs-v1.rasa.com/1.10.2/api/tracker-stores/)
- [Event Brokers](https://legacy-docs-v1.rasa.com/1.10.2/api/event-brokers/)
- [Lock Stores](https://legacy-docs-v1.rasa.com/1.10.2/api/lock-stores/)
- [Training Data Importers](https://legacy-docs-v1.rasa.com/1.10.2/api/training-data-importers/)
- [Featurization of Conversations](https://legacy-docs-v1.rasa.com/1.10.2/api/core-featurization/)
- [TensorFlow Configuration](https://legacy-docs-v1.rasa.com/1.10.2/api/tensorflow_usage/)
- [Migration Guide](https://legacy-docs-v1.rasa.com/1.10.2/migration-guide/)
- [Rasa Open Source Change Log](https://legacy-docs-v1.rasa.com/1.10.2/changelog/)

### Migrate from (beta)

- [Dialogflow](https://legacy-docs-v1.rasa.com/1.10.2/migrate-from/google-dialogflow-to-rasa/)
- [Wit.ai](https://legacy-docs-v1.rasa.com/1.10.2/migrate-from/facebook-wit-ai-to-rasa/)
- [LUIS](https://legacy-docs-v1.rasa.com/1.10.2/migrate-from/microsoft-luis-to-rasa/)
- [IBM Watson](https://legacy-docs-v1.rasa.com/1.10.2/migrate-from/ibm-watson-to-rasa/)

### Reference

- [Glossary](https://legacy-docs-v1.rasa.com/1.10.2/glossary/)

### Actions

Actions are the things your bot runs in response to user input. There are four kinds of actions in Rasa:

> 1. **Utterance actions**: start with `utter_` and send a specific message to the user.
> 2. **Retrieval actions**: start with `respond_` and send a message selected by a retrieval model.
> 3. **Custom actions**: run arbitrary code and send any number of messages (or none).
> 4. **Default actions**: e.g. `action_listen`, `action_restart`, `action_default_fallback`.

#### Utterance Actions

To define an utterance action (`ActionUtterTemplate`), add a response to the domain file that starts with `utter_`:

```
responses:
  utter_my_message:
    - "this is what I want my action to say!"
```

It is conventional to start the name of an utterance action with `utter_`. If this prefix is missing, you can still use the response in your custom actions, but the response can not be directly predicted as its own action. See [Responses](https://legacy-docs-v1.rasa.com/1.10.2/core/responses/#responses) for more details.

#### Retrieval Actions

Retrieval actions make it easier to work with a large number of similar intents like chitchat and FAQs. See [Retrieval Actions](https://legacy-docs-v1.rasa.com/1.10.2/core/retrieval-actions/#retrieval-actions) to learn more.

#### Custom Actions

An action can run any code you want. Custom actions can turn on the lights, add an event to a calendar, check a user’s bank balance, or anything else you can imagine.

Rasa will call an endpoint you can specify, when a custom action is predicted. This endpoint should be a webserver that reacts to this call, runs the code and optionally returns information to modify the dialogue state.

To specify, your action server use the `endpoints.yml`:

```
action_endpoint:
  url: "http://localhost:5055/webhook"
```

And pass it to the scripts using `--endpoints endpoints.yml`.

You can create an action server in node.js, .NET, java, or any other language and define your actions there - but we provide a small python SDK to make development there even easier.

#### Default Actions

The available default actions are:

|     |     |
| --- | --- |
| `action_listen` | Stop predicting more actions and wait for user input. |
| `action_restart` | Reset the whole conversation. Can be triggered during a conversation by entering `/restart` if the [Mapping Policy](https://legacy-docs-v1.rasa.com/1.10.2/core/policies/#mapping-policy) is included in the policy configuration. |
| `action_session_start` | Start a new conversation session. |
| `action_default_fallback` | Undo the last user message and utter a message that the bot did not understand. |
| `action_deactivate_form` | Deactivate the active form and reset the requested slot. |
| `action_revert_fallback_events` | Revert events that occurred during the TwoStageFallbackPolicy. |
| `action_default_ask_affirmation` | Ask the user to affirm their intent. |
| `action_default_ask_rephrase` | Ask the user to rephrase their intent. |
| `action_back` | Undo the last user message. |

All the default actions can be overridden. To do so, add the action name to the list of actions in your domain:

```
actions:
- action_default_ask_affirmation
```

Rasa will then call your action endpoint and treat it as every other custom action.