[FEATURE] Save teammate sessions and make them accessable using /resume

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

If claude closes while using teammates, the teammates' session history is lost. the team lead would need to dispatch more teammates which continue where the previous ones left off.

Proposed Solution

I wish teammates that spawned could be resumed the same way any claude code session can be resumed.
that way the orchestrator agent could make a teammate, get things going, and I could /resume it later if needed.

Or if the session is closed accidentally, the teammate could just resume.

Alternative Solutions

i have multiple claudes open, but would be nicer if i could just work wiht one claude team, and teammates that each handle 1 task, and can communicate with each other.

Priority

High - Significant impact on productivity

Feature Category

CLI commands and flags

Use Case Example

Scenario:

1. I start a claude team with several teammates working
2. I close the claude instance
3. I resume the claude instance using /resume
4. The teammates are not lost, but can resume as well.

Scenario 2:

1. I start a claude team with several teammates working
2. I close the claude window
3. I can /resume a specific teammate and continue that conversation natively (like a normal claude session)

Additional Context

_No response_