import { RacingDomainValidationError } from '../errors/RacingDomainError'; export class Weight { private constructor(private readonly value: number) {} static create(value: number): Weight { if (value <= 0) { throw new RacingDomainValidationError('Weight must be positive'); } return new Weight(value); } toNumber(): number { return this.value; } equals(other: Weight): boolean { return this.value === other.value; } }