Summary
Vercel's Agent Runs view now shows subagent activity, giving developers visibility into what nested child agents do within a run.
What changed
On 2026-07-13 Vercel updated Agent Runs to display subagent activity, exposing the operations of subagents spawned within an agent run (initially on eve projects).
Why it matters
Multi-agent systems are hard to debug because child agents act opaquely. Surfacing subagent activity in the run timeline makes delegation observable, helping developers trace failures and understand cost and behavior in orchestrated agent workflows.
Evidence excerpt
Agent Runs now show subagent activity on eve projects.