[FEATURE] reuse same CLI for multiple 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

I often need to spawn multiple claude code, especially when using the claude agent sdk on a server.

This requires spawning multiple claude processes, each one using at least 200mb RAM because of the js runtime.

Claude code is mostly io bound, not cpu bound, so it would make sense to be able to "attach" to a running claude and merely ask it to run another "loop" in a thread.

Proposed Solution

spawning only one claude per sdk import, then reuse the same when creating multiple agents.

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_