Swarm Fleet
On larger tasks, Trace can split the work across several sub-agents running at the same time instead of doing everything in one long, sequential pass.
It's automatic, not a mode you switch on
There's no separate "swarm mode" toggle. When you ask for something and the agent decides the task genuinely benefits from parallel work — for example, several independent pieces that don't depend on each other — it spawns a small fleet of worker agents on its own, each handling one piece, coordinated by the same agent you're already talking to.
Watching it work
When a swarm spawns, you'll see a small live card appear in the conversation with a Swarm Monitor button. Click it to open a dedicated panel showing every worker agent, what each one is doing right now, and their progress — updated live as they work, not just once they finish.
Once every worker finishes, the coordinating agent picks the conversation back up automatically with their combined results — you don't need to do anything to "collect" the output.