Location: Settings → Preconfigs

A preconfig defines what your agent can do and how it behaves. Each preconfig bundles a system prompt, a set of tools, a default model, and spawn rules for subagents. You can create multiple preconfigs for different tasks and switch between them in any session.

The preconfig list

Set one as default and it will be auto-selected when you open a new session. Other preconfigs are available via the preconfig selector in the chat input.

Edit a preconfig

Click a preconfig to open the editor:

Field	What it does
Name	Display name for the selector
Description	What this agent does. Other agents read this when deciding which subagent to spawn.
Model	Leave unset to inherit the session model
Default	Auto-select this preconfig for new sessions
Tools	Which tools this agent can use. Only granted tools are available.
Temperature	Controls creativity. 0 = deterministic, higher = more random.
Skills	Leave empty to use all available skills, or pick specific ones.
System Prompt	The agent's behavior, role, and constraints. This is where you define what the agent actually does.

Subagent rules

Toggle whether the agent can spawn subagents. If enabled, you can limit which preconfigs it's allowed to spawn, or let it use all of them.

When a subagent is spawned, it runs in an isolated session within the same workspace. Interrupts cascade. Stop the parent, stop them all.

What's next

Subagents: how the orchestration works
Chat Controls: switching preconfigs in a session
Skills: SKILL.md instruction sets