Modern TypeScript Engineering Baseline

Configure a pnpm-based Node.js TypeScript project using ESM, strict compiler settings, ESLint, Prettier, and Vitest.

Model process identifiers, session identifiers, commands, and instrumentation states with branded types, readonly data, and discriminated unions.

Validate unknown configuration and runtime data at application boundaries with Zod schemas.

Represent expected failures with typed result values and translate unexpected exceptions into application errors.

Write Vitest unit tests for an asynchronous TypeScript service using test doubles and deterministic assertions.