Undo last action

After confirming a change in Agent Builder, you can revert the most recent write with a single undo — without manually reconstructing the previous configuration.

How undo works

Property	Detail
Scope	Last confirmed write in the current Agent Builder session
Depth	One level — undo the last action, not a full history stack
Availability	~30 minutes after confirmation (matches session TTL)
Who	Admin who confirmed the change, or any org Admin

Trigger undo

In Agent Builder chat:

Undo the last change

Or click Undo last action in the confirmation banner shown immediately after apply.

What gets reverted

Undo restores the previous values for all fields changed in that confirmed action:

Change type	Undo behavior
Prompt / model update	Restores prior text and model ID
KB or tool attach/detach	Reverses attachment state
Tool create	Archives the created tool
Deployment appearance	Restores prior colors, greeting, questions
Allowed domains	Removes added domains / restores removed ones

What undo does not cover

Scenario	Alternative
Changes made outside Agent Builder (dashboard, API)	Revert manually or via API
Changes older than session TTL	Use audit feed to identify values; re-apply manually
Second confirmed change after the first	Undo only affects the latest change
Document uploads to KBs	Delete document via dashboard or Knowledge bases API

Undo preview

Like forward writes, undo shows a preview before applying:

Undo will restore:
- master_prompt → previous version (482 chars)
- model → gpt-5.4-mini
Confirm undo?

Audit trail

Undo actions are logged as agent_builder.undo in audit logs with a reference to the original change ID.