Request: native Rust rewrite of Claude Code core (fix idle CPU spikes + terminal flicker)

Problem

The TypeScript terminal rendering layer causes:

• Noticeable idle CPU spikes even when not actively streaming
• Terminal flickering during streaming output

This is on a standard terminal setup; the overhead appears tied to the JS/TS runtime layer handling terminal rendering rather than actual workload.

Request

Claude Code has already started moving parts of the stack (Bun) toward Rust. Requesting that this go further: a full native Rust implementation of the CLI, removing the JavaScript/TypeScript wrapper layer entirely.

Expected benefits:

• Lower idle/background CPU usage
• Elimination of streaming-related terminal flicker
• Faster startup and lower memory footprint typical of native binaries vs. Node/Bun-hosted JS

Why it matters

For terminal-heavy workflows, the current overhead is a consistent friction point during long sessions. A native implementation would bring the performance profile in line with other terminal-native tools.

Happy to provide more diagnostic detail (OS, terminal emulator, profiling output) if useful.