Bounded Browser Subagent Execution (Loop & DOM Bounding)

Overview

Spawning an autonomous browser subagent with a vague prompt ("Go to the documentation website and find information on rate limits") is one of the most expensive failure modes in agentic systems.

Unbounded browser subagents click exploratory links, get trapped in cookie banners and CAPTCHAs, ingest raw 50,000-token HTML DOM trees, and take 30+ visual screenshots - burning 200,000+ tokens and stalling the parent agent for 5 minutes.

The Bounded Browser Subagent Protocol enforces strict Step Ceilings, Deterministic Stop Conditions, and Selector-Targeted DOM Extractions.

Unbounded Exploration vs. Bounded Surgical Execution