2.7The Same Mapping in Commercial SDKs

This phase-to-command mapping is not unique to the Playwright CLI — it is exactly what production agentic browser SDKs expose. Stagehand (Browserbase) collapses Think+Act into a single intent call: act("click the submit button") resolves natural language against the observed page, the same way our agent resolves "click Sign In" to a ref. browser-use does the same in Python at framework scale. Vibium's vibe-check does it with CSS selectors over WebDriver BiDi. Once you understand the mapping in this file, those SDKs are just packaged, hardened versions of the loop you can already build by hand.