Build Agents

This path is for composing agent behavior after you understand the basics.

Recommended order

1. Build an Agent to define the runtime, model registry, and agent spec.
2. Add a Tool and Add a Plugin to extend behavior safely.
3. Add discovery and delegation layers with Use Skills Subsystem, Use MCP Tools, and Use Agent Handoff.
4. Add specialized behavior with Use Reminder Plugin, Use Generative UI, and Use Deferred Tools.

Keep nearby

• Tool Trait for exact tool contracts.
• Tool and Plugin Boundary for extension design decisions.
• Architecture when you need the full runtime model.