Jev chooses an action from the accessibility tree, then Stagehand executes it.

kylejeong demonstrates computer/browser use with Jev and Stagehand in a remote browser. The loop observes the page, sends the accessibility tree as state and actions as questions, lets Jev decide, and executes through Stagehand. The author reports $0.001 for the shown task; this is one demonstration, not a general cost benchmark.