Purpose
Initialize a new MERN project with the standard stack, scaffolding, GitHub security, and constraints.
Input: <app-name> (optional, default: "app"). Use . to scaffold in the current (empty) directory.
Startup sequence (run in order)
1. Confirm stack decisions
/mern-stack
Establishes: toolchain, monorepo layout, Next.js conventions, database approach, environments.
2. Scaffold the project
/mern-scaffold <app-name> [--github]
Creates: build-green b
[Description truncada. Veja o README completo no GitHub.]