JavaScript Strict Standard

Rules extracted from production Node.js services (non-TypeScript).

CRITICAL: Variable Declarations

JS-01: const by default, let when necessary, never var

// BAD
var count = 0;
var items = [];

// GOOD
const VALID_MODES = ['bypass', 'browser', 'capsolver'];  // Never changes
let activeCount = 0;  // Reassigned in loop
let currentDelay = baseDelay;  // Mutated by logic