Microsoft TypeScript-Go Preview Mostly Feature-Complete
Microsoft's project to port the TypeScript compiler to Go — the foundational work for TypeScript 7 — has reached near feature-parity in preview. Core compiler features marked as done include parsing, type resolution, type checking, JSX handling, JavaScript emit, build mode, project references, and incremental builds. JSDoc inference and the language service API remain in progress. The preview is installable today as @typescript/native-preview on npm and can be activated in VS Code via js/ts.experimental.useTsgo: true.
Why It Matters
The TypeScript-Go port is the biggest single performance bet in the TypeScript ecosystem — a native Go compiler is expected to deliver dramatically faster type-checking on large codebases compared to the current Node.js implementation. For AI coding agents that run TypeScript type-checking in tight feedback loops (build → check → fix → retest), a faster tsc is a direct productivity multiplier.