Limitação de Taxa

Outcome: Complete the task with Limitação de Taxa (Rate Limiting). User context: Depois de muitas tentativas de login com falha, novas tentativas ficam mais lentas. Um usuário real ainda pode usar a recuperação de conta. Technical concept or control: Limitação de Taxa (Rate Limiting). Why it fits: Use cotas visíveis para reduzir abusos, ataques de força bruta e sobrecarga por engano. Do not use it when: Nunca use um limite global que bloqueie injustamente redes compartilhadas ou chamadas críticas. Engineering requirements: Define inputs, outputs, contracts, and rules that must always hold. Set authorization and input checks. Define failures, timeouts, retries, one-time effects, data moves, and compatibility limits. Operations: Add useful signals and logs that hide sensitive data. Set capacity limits and write an operator guide. Test recovery and rollback. Acceptance criteria: Contract and failure-path tests pass. Data and authorization rules still hold during retries and partial failures. Check performance limits, monitoring, recovery, and rollback. Evidence and limits (evidence boundary): Nenhum padrão oficial único controla todo o termo. Seu significado pode mudar entre equipes, plataformas ou frameworks. Unknowns to confirm: Where the code runs, data stores, traffic shape, consistency needs, and the security boundary. Also confirm the compatibility period, service goals, and rollback limits.