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The ongoing evolution of AI agent development emphasizes the need for adaptable and durable orchestration layers in response to rapidly shifting patterns and technologies. While agent frameworks often require complete rewrites with each paradigm shift, a focus on stable primitives like durable steps, persistent state, and event-driven control flow allows for seamless adaptation. This approach ensures that underlying execution guarantees remain constant, even as the agent layer, which involves logic and reasoning processes, changes frequently, and the model layer, which involves selecting APIs and providers, shifts even more rapidly. As AI moves from synchronous interactions to asynchronous background agents, the infrastructure must support long-running tasks with robust execution and observability. Ultimately, maintaining a flexible orchestration layer enables swift iteration and adaptation to new model capabilities and agent patterns without necessitating infrastructure overhauls.