Control persistent Chrome browser with automatic page capture.

Every DOM action (navigate, click, type, select, eval) auto-captures to the session dir:

• {prefix}.png — viewport screenshot

• {prefix}.md — page content as structured markdown

• {prefix}.html — full rendered DOM

• {prefix}-console.txt — browser console messages

Prefer reading these files to using 'extract' or 'screenshot' whenever possible.

Schema: 4 parameters — action, selector (CSS/XPath or null), payload (string or object), timeout (ms). selector targets a DOM element (null/omit for navigation, eval, tab management, etc.). payload is a string for simple actions (navigate=URL, type=text, eval=JS, keyboard_press=key). payload is an object for structured actions (set_viewport={width,height}, drag_drop={target}, etc.). Tabs are tracked as sticky state; use switch_tab to change the active tab. Use action='help' for full per-action payload shapes.