GitHub Migrates Copilot Runtime to Rust Using AI-Assisted Rewrite
The migration proves that large codebases can shift to Rust via AI assistance while maintaining continuous production releases.
• GitHub migrated the Copilot runtime from TypeScript and Node.js to Rust.
• The AI-assisted rewrite replaced over 800,000 lines of production code in 14.5 weeks.
• Client startup and session creation dropped from 5.25 seconds to 292 milliseconds.
Read more
October 9, 2026 18
