The simplest reliable single-agent workflow architecture often involves a centralized persistent task queue. This setup includes a single agent continually polling the task queue for new work. Upon fetching a task, the agent processes it, then updates the task's status or removes it from the queue, ensuring at-least-once processing semantics. For reliability, tasks should be stored durably in the queue, allowing the agent to recover from crashes and restart processing from where it left off. Robust error handling mechanisms, possibly involving retries with exponential backoff and a dead-letter queue for unprocessable items, are crucial to prevent task loss and ensure eventual completion. This design prioritizes simplicity and resilience, making it foundational for more complex distributed systems. More details: https://www.pesca.com/link.php/infoguide.com.ua