persona-nodejs-senior

To generate an OpenAPI contract for a Node.js backend, apply Phase-Level API First Design to define a complete API surface using reusable DTOs and strict TypeScript typing before implementation begins.

Phase-Level API First design is a process that establishes a defined API surface and generates an OpenAPI contract for a specific development phase before any code implementation, ensuring strict architecture decisions and TypeScript typing.

Choosing between NestJS and Express.js for TypeScript API design requires decision guidance based on project needs, evaluating strict architecture requirements and API constraints to determine the appropriate Node.js framework.

Yes, you can generate Mermaid sequence diagrams and flowcharts from OpenAPI specs by applying strict documentation protocols that produce consistent visual documentation alongside the API contract and reusable DTOs.

Document Node.js API architecture using MermaidJS by generating Mermaid flowcharts and sequence diagrams alongside the OpenAPI contract, ensuring every task receives structured visual documentation during the design workflow.

Yes, TypeScript is required for this API design approach because the workflow enforces strict TypeScript typing and generates reusable DTOs to ensure a well-defined API surface before backend implementation.