[Request] AI Assistant inference API/ML node dependency

[e40pud]

Description

As part of the new AS Assistant feature - Using Past Conversation - which we plan to release in 9.2, we have to update a conversation schema to include a new summary field of a semantic_text type.

This requires the inference endpoint (ELSER v2 and E5) to be available for the conversation update operations.

After discussing with the team, we decided to add a "inference API/ML node" dependency for the AI Assistant. Even though the actual feature won't be available via the UI until the release, the schema changes are going to be present. This means that we will need to add appropriate documentation updates before the 9.2 release (to cover Serverless).

cc @spong @jamesspi @dhru42

Background & resources

• PRs: [Security Solution][AI Assistant] Update ConversationSummary schema and interface (#13657) kibana#232288
• Issues/metas: https://github.com/elastic/security-team/issues/12768
• Point of contact: @e40pud

Which documentation set does this change impact?

ESS and serverless

ESS release

9.2

Serverless release

The week of Sep 1st, 2025

Feature differences

The feature is identical in ESS and Serverless.

API docs impact

There are no API endpoints required in this docs change.

Prerequisites, privileges, feature flags

No response

[benironside]

feature was pushed, not getting released in 9.2