Function assert

test/e2e.ts:31–39

(condition: boolean, msg: string)

let failed = 0;

function assert(condition: boolean, msg: string) {
  if (condition) {
    console.log(`  ✓ ${msg}`);
    passed++;
  } else {
    console.error(`  ✗ FAIL: ${msg}`);
    failed++;
  }
}

// ─── Part 1: Rule-Based Classifier ───