411: The Power of Tree-Sitter

Alex and Chris hop on the show to talk about a bit of technology that Alex calls "The 2nd best technological choice he's ever made." That technology is called Tree-sitter . It's a code parsing tool for building ASTs (Abstract Syntax Trees) out of code. GitHub uses it to power search and "go to" functionality. The creators now work on Zen , where a code parser is paramount. We use it to understand an entire Pen very quickly so we can understand how it all links together (among other things) and make a plan for how to process the Pen (a "build plan"). It's fast, accurate, forgiving, and extensible. Just a heck of a learning curve. Jump Links

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411: The Power of Tree-Sitter is an episode from CodePen Radio by CodePen Blog.

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This episode was published on Oct 1, 2025.

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