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Guide · Agent skill

How to use the Browser Edge-Case Debugging agent skill

Updated · written with AI from the project's own documentation and checked against our catalogue data

The browser-edge-cases skill is a troubleshooting playbook for AI agents that control a web browser. When an action such as scrolling, clicking, typing or taking a snapshot reports success but the page does not respond, the skill tells the agent how to reproduce the problem, inspect the page and try fallback techniques, with specific notes for LinkedIn, Twitter/X, single-page apps and pages that use Shadow DOM. This guide explains what the skill does, how to install it, how to trigger it and what it needs before you rely on it.

Browser Edge-Case Debuggingaden-hive/hive · Apache-2.0

Quick start

  1. 1Download the ZIP. Download the browser-edge-cases skill ZIP from this page.
  2. 2Unzip into a skills folder. Extract the ZIP into ~/.claude/skills/ for personal use or into .claude/skills/ in a project folder.
  3. 3Or upload in the Claude apps. In the Claude apps, open Settings → Capabilities → Skills and upload the skill.
  4. 4Set up the Hive browser bridge. Make sure the Hive framework with its gcu.browser bridge is running and a browser extension is connected on port 9229.
  5. 5Describe the failure. Ask the agent in plain language about the site and the symptom, such as a scroll that reports success but does not move the page.
  6. 6Follow the SOP. Let the agent reproduce the issue on example.com and the problem site, inspect the DOM and apply the matching pattern.
  7. 7Document the result. Record the verified fix in registry.md so the case is covered for future regression checks.

What is an agent skill and what does this one do?

An agent skill is a folder of instructions and optional files that an AI agent can load when a task matches the skill's description. This one is named browser-edge-cases and its core file is SKILL.md, a standard operating procedure for debugging browser automation failures on complex websites.

The skill covers cases where browser tool calls appear to work but nothing happens. The source lists these symptoms: a scroll that succeeds but does not move the page, a left click that succeeds but triggers nothing, typing that disappears or does not work, a snapshot that hangs or returns stale content, and a navigation that loads the wrong content.

  • Phase 1: reproduce the failure and compare a simple site (example.com) with the problem site.
  • Phase 2: check the console for errors, inspect the DOM structure and match the symptom to a likely cause.
  • Phase 3: apply a multi-layer fix with fallbacks and timeouts.
  • Phase 4: verify the fix on the problem site, re-check a simple site, and document the case in registry.md.

Install the browser-edge-cases skill

Download the ZIP of the skill from this page. Unzip it into one of two locations: ~/.claude/skills/ to make it available across your projects, or .claude/skills/ inside a specific project folder to limit it to that project.

If you use the Claude apps instead, upload the skill under Settings → Capabilities → Skills.

  • Personal install: unzip into ~/.claude/skills/
  • Project install: unzip into .claude/skills/ in your project folder
  • Claude apps: Settings → Capabilities → Skills, then upload the skill

How to trigger the skill with natural requests

You do not need a special command. The skill's description says to use it when browser tools fail on specific sites such as LinkedIn, Twitter/X, SPAs or sites with Shadow DOM, so describe the failure in plain language that names the site or the symptom.

Good requests name the action, the site and the symptom. Including the exact tool call that reported success helps the agent connect the request to the SOP.

  • Scrolling on LinkedIn reports success but the feed does not move. Debug this using the browser-edge-cases skill.
  • My browser_interact click on this Twitter/X button returns ok but nothing happens. Find out why.
  • The snapshot on this single-page app hangs. Walk through the edge-case playbook.
  • Typing into this field on a Shadow DOM page clears the text. Help me debug it.

What you need before you start

The skill is written for developers working with the Hive framework and its gcu.browser bridge (tools/src). The playbook assumes a working browser automation stack and some code knowledge. The test scripts also expect a browser extension connected to the bridge, which they wait for on port 9229, and Python with asyncio.

The skill is specific to the browser_* tools it references, so it is not a general guide to browser automation or scraping.

  • The Hive framework with its gcu.browser bridge (tools/src)
  • A browser extension connected to the bridge (test scripts wait for it on port 9229)
  • Python with asyncio for the test scripts
await browser_navigate(tab_id, "https://example.com")

Examples of the skill's known cases and test scripts

The registry.md file lists known edge cases with symptoms, root causes, detection methods and fixes. For example, case #1 covers a LinkedIn feed where the content sits in a nested scrollable div rather than the main window, and the fix is a JavaScript step that finds the largest scrollable container and scrolls it. Case #2 covers Twitter/X infinite scroll that does not load new content because lazy loading needs content to be visible.

The scripts folder contains Python tests that check specific failures against a live browser. Their names indicate the case they cover, such as test_02_twitter_scroll.py, test_03_modal_scroll.py, test_04_element_covered.py, test_06_shadow_dom.py, test_07_contenteditable.py, test_08_autocomplete.py, test_10_huge_dom.py, test_13_spa_navigation.py and test_15_screenshot.py. Use scripts/test_case.py as the template when you add a new case.

  • Pattern P1: nested scrollable containers (LinkedIn, Twitter/X)
  • Pattern P2: element covered by an overlay
  • Pattern P3: React synthetic events, where a JavaScript click() is the primary fix
  • Pattern P4: huge DOM and accessibility tree, where you add a timeout and truncate at 2000 nodes
  • Pattern P5: SPA hydration delay, where you wait for a selector after navigation
  • Pattern P6: Shadow DOM, where you pierce shadow roots with the >>> separator
def queryShadow(selector) { /* splits on '>>>' and walks shadowRoot at each step */ }

Safety notes: scripts and network access

This skill runs scripts and uses the network. The test scripts drive a live browser, and the techniques it describes, such as scripted clicks, scrolling feeds and bypassing overlays, may conflict with a site's terms of service. Only automate sites you have permission to automate.

Read the scripts before running them, and run them against sites and accounts where an unexpected action would be harmless.

  • Use only on sites you have permission to automate.
  • Check a site's terms of service before running scripted clicks or scrolling feeds.
  • Review each script in the scripts folder before you run it.
  • Use a test account rather than a personal one when you exercise a logged-in site.

What people use it for

  • Debugging a scroll action that reports ok but leaves a LinkedIn feed in place because the content is in a nested scrollable container.
  • Checking why a click on a Twitter/X control does nothing and trying a JavaScript click fallback.
  • Diagnosing a snapshot that hangs on a huge DOM and adding a timeout with a DOM-based fallback.
  • Piercing Shadow DOM roots to reach a form field inside a web component.
  • Adding a new edge case to the registry and a test script based on scripts/test_case.py for regression checks.

Frequently asked questions

Is the browser-edge-cases skill free to use?

The repository is listed under Apache-2.0, but the SKILL.md frontmatter in the skill states MIT. Check the license files in the download before you reuse or redistribute it, since the two sources differ.

How do I install the browser-edge-cases agent skill?

Download the ZIP from this page and unzip it into ~/.claude/skills/ for personal use or into .claude/skills/ in a project folder. In the Claude apps, you can instead upload it under Settings → Capabilities → Skills.

What do I need to run the browser-edge-cases test scripts?

You need the Hive framework with its gcu.browser bridge (tools/src), a browser extension connected to that bridge since the scripts wait for it on port 9229, and Python with asyncio. The skill assumes you already have a working browser automation stack.

Why does my browser tool say scroll succeeded when the page did not move?

The skill's registry describes this symptom on LinkedIn, where the content is inside a nested scrollable div rather than the main window. The suggested fix is to find the largest scrollable container and scroll that element instead.

Can I use this skill for ordinary web scraping?

No. The skill is for developers debugging the browser_* tools in the Hive framework. It is not meant for ordinary end users who just want to browse or scrape a site.

What are the alternatives to this skill for browser automation debugging?

The source does not compare this skill with other tools, so it makes no claims about alternatives. If your problem is not tied to the browser_* tools or the Hive framework, this skill is likely not the right fit.

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Our verdict

Pick this skill if you build browser-automation agents on the Hive framework and need a documented playbook, known edge cases and test scripts for scroll, click and typing failures on LinkedIn, Twitter/X, SPAs or Shadow DOM pages. Skip it if you just want to browse or scrape a site, if you lack a working browser stack and Python, or if your problem has nothing to do with the browser_* tools.

Download the skill