What problem does it solve? TypeScript 7 is a Go-native rewrite of the compiler with different configuration rules, removed options, and no stable programmatic API in 7.0, so teams risk broken builds, misconfigured tsconfig files, and incompatible tooling when adopting or migrating to it. ## Core Features & Use Cases - New Project Configuration: Provides a pinned, strict tsconfig baseline for Node.js 26 ESM projects using TypeScript 7, including module resolution and strictness flags. - TypeScript 6 to 7 Migration: Guides a staged port covering deprecation cleanup, removed configuration replacement, API-coupling inventory, and side-by-side compiler setups via the TypeScript 6 compatibility package. - Compiler Verification: Ships a bash script that validates the installed tsc executable and reports structured JSON results with specific error keys like wrong_major or compiler_not_executable. - Use Case: A team upgrading a large TypeScript 6 monorepo uses this Skill to inventory tools importing the typescript package, replace removed options like baseUrl and target es5, then verify the new compiler in CI before switching. ## Quick Start Ask the agent to configure this project for TypeScript 7 or to port the existing TypeScript 6 codebase and verify the installed compiler version.