Unit Test AI Guide — Zero Hallucination, Cross-Stack Standard

The Unit Test AI Guide establishes a cross-stack standard for generating deterministic unit tests without hallucination using Cursor and Claude. It focuses exclusively on unit tests, excluding integration and E2E. The framework mandates a single library per stack: Jest for Node.js, NestJS, and Express; Vitest with @testing-library/react for React.js; and pytest for Python. This strict approach ensures consistency and speed, leveraging native DI mocking and Vite/ESM support to optimize the AI generation process.