Hand-crafted adapters that sit between playwright primitives and the agent loop are the secret sauce. The goal is to insulate the agent from the raw DOM without any loss in fidelity regarding the logical business information and available actions.

+1 I have found extremely reliable systems require a mix of deterministic "adapters" is a good word for agents to actually get through the workflows I've created. I'm still amazed that it can work with both those and some "intuition" to bend the rules around the adapters if prompted.