[DOCS] Obs AI Assistant connector (#183792)

## Summary

Adds reference documentation about the Obs AI Assistant connector
(requested in #181282)

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

docs/management/action-types.asciidoc

@@ -40,6 +40,10 @@ a| <<teams-action-type,Microsoft Teams>>
 
 | Send a message to a Microsoft Teams channel.
 
+a| <<obs-ai-assistant-action-type,Observability AI Assistant>>
+
+| Add AI-driven insights and custom actions to your workflow.
+
 a| <<openai-action-type,OpenAI>>
 
 | Send a request to OpenAI.
@@ -144,7 +148,7 @@ image::images/connector-filter-by-type.png[Filtering the connector list by types
 // NOTE: This is an autogenerated screenshot. Do not edit it directly.
 
 You can delete individual connectors using the trash icon. Alternatively, select
-multiple connectors and delete them in bulk using the *Delete* button. 
+multiple connectors and delete them in bulk using the *Delete* button.
 
 [role="screenshot"]
 image::images/connector-delete.png[Deleting connectors individually or in bulk]

docs/management/connectors/action-types/obs-ai-assistant.asciidoc

@@ -0,0 +1,67 @@
+[[obs-ai-assistant-action-type]]
+== Observability AI Assistant connector and action
+++++
+<titleabbrev>Observability AI Assistant</titleabbrev>
+++++
+:frontmatter-description: Add a rule action that adds AI-driven insights and custom actions to your workflow.
+:frontmatter-tags-products: [kibana]
+:frontmatter-tags-content-type: [how-to]
+:frontmatter-tags-user-goals: [configure]
+
+preview::[]
+
+The Observability AI Assistant connector adds AI-driven insights and custom actions to your workflow.
+
+To learn how to interact with the assistant through this connector, refer to the {observability-guide}/obs-ai-assistant.html[Observability AI Assistant] documentation.
+
+[float]
+[[define-obs-ai-assistant-ui]]
+=== Create connectors in {kib}
+
+To use this connector, you must have been granted access to use the Observability AI Assistant feature.
+You cannot manage this connector in *{stack-manage-app} > {connectors-ui}* or by using APIs.
+You also cannot create an Observability AI Assistant <<pre-configured-connectors,preconfigured connector>>.
+It is available only when you're creating a rule in {kib}.
+For example:
+
+[role="screenshot"]
+image::management/connectors/images/obs-ai-assistant-action.png[Add an Observability AI Assistant action while creating a rule in the Observability UI]
+
+NOTE: You can have only one Observability AI Assistant action in each rule.
+
+[float]
+[[obs-ai-assistant-connector-configuration]]
+==== Connector configuration
+
+Observability AI Assistant connectors have the following configuration properties:
+
+Connector::
+The name of the connector to use to send requests to your AI provider.
+For more information, refer to <<openai-action-type>> or <<bedrock-action-type>>.
+
+Message::
+A message containing the prompt to send to the Observability AI Assistant.
+The message can specify a set of tasks for the assistant to perform, such as creating a graph or report,
+and it can call an available connector to send messages to an external system, such as Slack.
+
+NOTE: Currently you can only send messages to a Slack webhook.
+Support for additional connectors will be added in the future.
+
+For example, you can create a rule that sends the following prompt to the AI Assistant when an error count threshold is breached:
+
+[source,text]
+-----
+High error count alert has triggered. Execute the following steps:
+  - create a graph of the error count for the service impacted by the alert
+  for the last 24h
+  - to help troubleshoot, recall past occurrences of this alert, plus any
+  other active alerts. Generate a report with all the found information
+  and send it to the Slack connector as a single message. Also include
+  the link to this conversation in the report.
+-----
+
+[float]
+[[obs-ai-assistant-action-configuration]]
+=== Test connectors
+
+You cannot test or edit these connectors in {kib} or by using APIs.

docs/management/connectors/index.asciidoc

@@ -6,6 +6,7 @@ include::action-types/resilient.asciidoc[leveloffset=+1]
 include::action-types/index.asciidoc[leveloffset=+1]
 include::action-types/jira.asciidoc[leveloffset=+1]
 include::action-types/teams.asciidoc[leveloffset=+1]
+include::action-types/obs-ai-assistant.asciidoc[leveloffset=+1]
 include::action-types/openai.asciidoc[leveloffset=+1]
 include::action-types/opsgenie.asciidoc[leveloffset=+1]
 include::action-types/pagerduty.asciidoc[leveloffset=+1]