[FEATURE] Consider writing core of claude-code in single base language

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 like very much claude-code agent tool, but when I have opened github for it, I was impressed that is mostly contains shell scripts ...
It would be much faster to use single tool as core utility for claude-code which calls different plugins.
If base logic consists of bunch of shell scripts, it means lots of create and deletion processes which could take additional time and increase latency

Proposed Solution

To make claude-code even more faster, it would be nice to use Rust as Codex did.
Maybe to use bun or deno runtimes for implementing the core functionality ...

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Developer tools/SDK

Use Case Example

_No response_

Additional Context

_No response_