claw-code: A High-Performance Rust Rebuild of Claude Code

ABSTRACT

This project is a complete architectural overhaul of the Claude Code CLI, rewritten from the ground up in Rust following the high-profile source leak on March 31, 2026. It aims to solve the severe memory bloat and CPU thrashing issues found in the original TypeScript/Node.js implementation by utilizing a zero-cost abstraction approach. The methodology focuses on porting the core QueryEngine and Tool loops into a memory-safe, compiled binary for sub-50ms startup times and minimal idle resource usage.