agent-browser

1# Agent Browser
2 
3Use a controlled browser to verify behavior, capture evidence, or extract information from web pages that a static fetch cannot reach (SPAs, login-gated pages, dynamic content). This skill is about supervised verification, not unattended scraping.
4 
5## When to use
6 
7- You need a screenshot of a deployed page or a local dev server to confirm a UI change.
8- You need to read JavaScript-rendered content that `curl`/`wget` will not see.
9- A user reports a UI bug and you need to reproduce it interactively to capture console errors, network requests, or layout state.
10- You need to walk through a short flow (load page, click, observe) to verify acceptance criteria.
11 
12## When not to use
13 
14- The page is reachable as static HTML. Use `curl`/HTTP fetch — it is cheaper, faster, and more reliable.
15- The task is unattended large-scale scraping. That belongs to a dedicated scraper with rate limits, robots.txt handling, and a real user agent policy — not this skill.
16- The site is behind authentication you do not own credentials for, or whose terms of service prohibit automation.
17- The site involves sensitive accounts (banking, healthcare, government) where automation risks lockout or compliance issues.
18 
19## Before launching the browser
20 
21- Confirm the URL and what state should be true after navigation.
22- Decide what evidence is needed: full-page screenshot, viewport screenshot, console log, network trace, HTML snapshot, extracted text.
23…