Microsoft Distinguished Engineer Stephen Toub rewrites 400KLOC Copilot runtime in Rust single-handedly
dfinke · x · 2026-11-03
Stephen Toub, Distinguished Engineer at Microsoft, rewrote the GitHub Copilot runtime — a roughly 400 KLOC codebase — in Rust by himself. "Large codebase rewrites are now entirely doable," he said, a striking showcase of AI-assisted engineering multiplying one engineer's output.
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