The soul
The soul is the coworker system prompt. It is the single most important field: it defines who the coworker is, what it owns, how it works and what it must never do. Edit it in Settings, under Soul (system prompt). It is markdown, so headings and lists are fine. A soul that works usually says:- who the coworker is and what job it holds
- what it is responsible for, and what it must hand to someone else
- how it should behave: tone, level of detail, when to ask before acting
- the rules that are not negotiable
Model and provider
Click the model name above the message box to change it. The picker has three sections.- Free
- Subscription
- API key
Rerun runs hosted models paid from the model credit included in your plan. No setup, no key. Pick one of three:
- Fast for quick, simple jobs. The cheapest on your credit.
- Balanced for everyday work. The default.
- Smart for your hardest tasks. It uses the most credit, and comes with a paid plan.
Capabilities
A coworker has families of tools, all switched on by default. Turn off what it has no business doing.
See Human in the loop for the last four.
Self-improvement
Separate from the capability list, and worth a deliberate decision.
All of these are on by default. A coworker that must stay exactly as you wrote it needs
allowSoulEdit and allowToolInstall off.
Other settings
Enabled switches the coworker off without deleting it. A switched-off coworker runs nothing and refuses calls from other coworkers.Name and handle
The name is free text, the one you see. The handle is the key other coworkers use to call it with@handle.
Renaming a coworker moves its handle too: the handle is re-derived from the new name, and every @oldhandle written into the other coworkers (prompts, skills, scheduled tasks, webhook triggers, memories) is rewritten to the new one. Set the handle on its own only when the call key should differ from the name.
Doing it from the API
Everything on this page is reachable withcreate_agent and update_agent, which is the fastest way to version a coworker setup or repeat it across workspaces.