TypeScript 7 Beta y tsgo: el compilador rapido exige una migracion medible
La mejora de velocidad importa, pero TypeScript tambien sostiene CI, editores, archivos .d.ts y herramientas internas. Por eso el cambio debe empezar como comparacion paralela.
What happened
Microsoft announced TypeScript 7.0 Beta on April 21, 2026. The beta is available as @typescript/native-preview@beta and runs through tsgo, so teams can compare it with TypeScript 6 tsc before changing their default toolchain.
Why it matters
TypeScript 7.0 Beta presenta un compilador nativo en Go. Los equipos deben validar tsgo junto a tsc antes de cambiar valores por defecto. This is especially relevant for large TypeScript codebases, monorepos, and teams where type-checking latency affects pull-request flow and editor responsiveness.
Lista practica
Mantener tsc como puerta de release, ejecutar tsgo sin bloquear, revisar JSDoc y CommonJS heredados, probar la extension de VS Code con un grupo pequeno y documentar criterios de promocion.
Risks
The official repository still marks the programmatic API as not ready, watch mode as prototype, and LSP work as in progress. Teams with legacy JavaScript, CommonJS, Closure-style JSDoc, or compiler-API tooling should validate those areas separately.