February 27, 2026
For nearly three decades, CRuby (MRI) has been overwhelmingly a C codebase. That stability has been both a strength and a constraint. Recently, however, something genuinely new appeared inside the official Ruby repository:
Parts of Ruby itself are now written in Rust.
This is not theoretical, experimental folklore, or third-party tooling. It is production code shipped with Ruby.
👉 Read the full article.
https://rubystacknews.com/2026/02/27/%f0%9f%a6%80-rust-inside-ruby-core-a-new-systems-layer-for-mri/
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