You can now edit subagents directly in the Asset Library in Setup. Updating a subagent in the Asset Library doesn't impact current agents, which use a copy of the original subagent.
Where: This change applies to Enterprise, Unlimited, Performance, and Developer editions.
When: This change is available starting the week of May 18, 2026.
How: From Setup, use the Quick Find box to find and select Agentforce Assets. Select the subagent that you want to edit and make changes directly in the detail page.