Skill: typescript

Scope

Applies to: TypeScript 6.0+ type system features, type-safe APIs, complex domain models, inference, compile-time guarantees
Does NOT cover: Basic syntax, framework-specific patterns, runtime validation (use Zod separately)

Folder major tracks package.json typescript (this repo: @typescript/typescript6 ^6), not npm view typescript (may already be 7)
6.0 is the last JavaScript-based compiler; 7.0 is native (Go). @typescript/native may sit beside tsc; it is not this skill’s major
Strict mode ("strict": true)
Target ES2020+ (6.0 defaults trend toward esnext / es2025)
Options deprecated in 6.0 can be ignored with "ignoreDeprecations": "6.0" until 7.0 removes them. Prefer fixing deprecations: https://devblogs.microsoft.com/typescript/announcing-typescript-6-0/