[FEATURE] Multiprocessing - use more cores

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

Claude code often sits there at 100% cpu for a very long time while it is figuring things out.

Proposed Solution

Claude is only using 1 core - I have 16. It would be much faster if claude could delegate to other worker threads.

I should be able to specific how many cores I want to use for Claude

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_