[FEATURE] Agent teams should be able to utilize predefined sub-agents

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Agent teams should be able to utilize predefined sub-agents.

Proposed Solution

This enables decoupling and reusability of sub-agents, while providing superior context control within agent team scenarios.

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Other

Use Case Example

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Additional Context

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