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What was the process of open-sourcing TypeScript, Chakra, .NET, VS Code, and the Copilot extension?

Microsoft Developer (Build) · Jun 09, 2026 · Engineering Insights

Microsoft's shrinking approval time from open-sourcing TypeScript to Chakra reflects a major internal culture shift toward open development.

“Developer products really amass a fan base and really actually become better products when they are built in the open.”

A Microsoft developer recounts the company's open-source journey from TypeScript and Chakra to .NET and VS Code, noting how approval times shrank dramatically as a sign of cultural change. While insightful on engineering philosophy and building in the open, it is a retrospective with no direct AI signal or new announcement.

open-source microsoft developer-tools engineering-culture

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