blECSd Core Library Skill

blECSd is a modern, high-performance terminal UI library built on TypeScript and ECS (Entity Component System) architecture using bitecs. It is a ground-up rewrite of the original blessed node library, NOT backwards-compatible. Version: 0.7.0. Node.js >= 22.0.0.

Hard Rules (Non-Negotiable)

1. Purely Functional, No OOP

BANNED: class, this, new (except Map/Set/Error), prototype manipulation, inheritance.

// WRONG
class MyWidget { private x: number; constructor(x: number) { this.x = x; } }

// CORRECT
interface MyWidget { readonly x: number; }
function createMyWidget(x: number): MyWidget { return { x }; }