archubbuck/browser-automation
/SKILL.md
Local Python-based browser automation toolkit using Playwright. Provides command-line tools for navigating, interacting with, and testing web applications without using MCP protocols. Supports clicking, typing, hovering, screenshots, content extraction, and JavaScript execution.
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SKILL.md
- name:
- browser-automation
- description:
- Local Python-based browser automation toolkit using Playwright. Provides command-line tools for navigating, interacting with, and testing web applications without using MCP protocols. Supports clicking, typing, hovering, screenshots, content extraction, and JavaScript execution.
- license:
- ISC
Browser Automation Skill
This skill provides local browser automation capabilities using Python and Playwright. All browser automation is performed locally via CLI commands - no MCP servers required.
Prerequisites
Install Playwright Python library:
pip install playwright
playwright install chromium
Available Tools
All tools are implemented as subcommands in assets/skills/browser-automation/scripts/browser_tools.py. Run any command with --help to see detailed usage.
browser_navigate
Navigate to a URL and wait for the page to load.
Usage:
python assets/skills/browser-automation/scripts/browser_tools.py browser_navigate <url>
Example:
python assets/skills/browser-automation/scripts/browser_tools.py browser_navigate https://example.com
browser_click
Click an element on a page using a CSS selector or text match.
Usage:
python assets/skills/browser-automation/scripts/browser_tools.py browser_click <url> <selector> [--text TEXT]
Parameters:
url: URL to navigate toselector: CSS selector for the element--text: (Optional) Text to match instead of using selector
Examples:
# Click by selector
python assets/skills/browser-automation/scripts/browser_tools.py browser_click https://example.com "#submit-button"
# Click by text
python assets/skills/browser-automation/scripts/browser_tools.py browser_click https://example.com "button" --text "Submit"
browser_type
Type text into an input field, with optional form submission.
Usage:
python assets/skills/browser-automation/scripts/browser_tools.py browser_type <url> <selector> <text> [--submit]
Parameters:
url: URL to navigate toselector: CSS selector for the input fieldtext: Text to type--submit: (Optional) Press Enter after typing
Examples:
# Type into field
python assets/skills/browser-automation/scripts/browser_tools.py browser_type https://example.com "#email" "[email protected]"
# Type and submit
python assets/skills/browser-automation/scripts/browser_tools.py browser_type https://example.com "#search" "query" --submit
browser_screenshot
Capture a screenshot of the current page.
Usage:
python assets/skills/browser-automation/scripts/browser_tools.py browser_screenshot <url> <path> [--full_page]
Parameters:
url: URL to navigate topath: Output file path for the screenshot--full_page: (Optional) Capture the entire scrollable page
Examples:
# Viewport screenshot
python assets/skills/browser-automation/scripts/browser_tools.py browser_screenshot https://example.com /tmp/screenshot.png
# Full page screenshot
python assets/skills/browser-automation/scripts/browser_tools.py browser_screenshot https://example.com /tmp/full.png --full_page
browser_get_content
Extract text or HTML content from the page or a specific element.
Usage:
python assets/skills/browser-automation/scripts/browser_tools.py browser_get_content <url> [--selector SELECTOR] [--html]
Parameters:
url: URL to navigate to--selector: (Optional) CSS selector, defaults to 'body'--html: (Optional) Return HTML instead of text
Examples:
# Get all page text
python assets/skills/browser-automation/scripts/browser_tools.py browser_get_content https://example.com
# Get specific element text
python assets/skills/browser-automation/scripts/browser_tools.py browser_get_content https://example.com --selector "#main-content"
# Get HTML
python assets/skills/browser-automation/scripts/browser_tools.py browser_get_content https://example.com --selector "article" --html
browser_hover
Hover over an element to trigger hover states or tooltips.
Usage:
python assets/skills/browser-automation/scripts/browser_tools.py browser_hover <url> <selector>
Parameters:
url: URL to navigate toselector: CSS selector for the element
Example:
python assets/skills/browser-automation/scripts/browser_tools.py browser_hover https://example.com ".menu-item"
browser_evaluate
Execute custom JavaScript code in the browser context.
Usage:
python assets/skills/browser-automation/scripts/browser_tools.py browser_evaluate <url> <script>
Parameters:
url: URL to navigate toscript: JavaScript code to execute
Examples:
# Get page title
python assets/skills/browser-automation/scripts/browser_tools.py browser_evaluate https://example.com "document.title"
# Get element count
python assets/skills/browser-automation/scripts/browser_tools.py browser_evaluate https://example.com "document.querySelectorAll('button').length"
# Manipulate DOM
python assets/skills/browser-automation/scripts/browser_tools.py browser_evaluate https://example.com "document.body.style.backgroundColor = 'red'"
Best Practices
- Always use full URLs: Include the protocol (http:// or https://)
- Wait for content: The tool automatically waits for 'networkidle' state
- Use robust selectors: Prefer ID selectors (#id) or specific CSS classes
- Error handling: All commands exit with non-zero status on failure and print errors to stderr
- Headless mode: All operations run in headless Chromium by default
Common Patterns
Form Automation
# Fill out a multi-field form
python assets/skills/browser-automation/scripts/browser_tools.py browser_type https://example.com "#name" "John Doe"
python assets/skills/browser-automation/scripts/browser_tools.py browser_type https://example.com "#email" "[email protected]"
python assets/skills/browser-automation/scripts/browser_tools.py browser_click https://example.com "#submit"
Visual Testing
# Note: Each command runs in a separate browser instance (stateless).
# The after screenshot won't show the toggled state from the click command.
# For stateful testing, combine actions in a custom Playwright script.
# Capture initial state
python assets/skills/browser-automation/scripts/browser_tools.py browser_screenshot https://example.com /tmp/before.png
# Compare different pages or states (each is independent)
python assets/skills/browser-automation/scripts/browser_tools.py browser_screenshot https://example.com/page1 /tmp/page1.png
python assets/skills/browser-automation/scripts/browser_tools.py browser_screenshot https://example.com/page2 /tmp/page2.png
Content Extraction
# Extract and process page content
python assets/skills/browser-automation/scripts/browser_tools.py browser_get_content https://example.com --selector "article" > article.txt
Architecture
- Stateless design: Each command launches a new browser instance
- No persistent sessions: Browser closes after each operation
- Local execution: All automation runs locally, no remote MCP servers
- Simple I/O: Results printed to stdout, errors to stderr
Troubleshooting
If you encounter issues:
- Install Playwright browsers: Run
playwright install chromium - Check Python version: Requires Python 3.8+
- Verify URL accessibility: Ensure the target URL is reachable
- Inspect selectors: Use browser DevTools to verify CSS selectors
Related Resources
- Examples:
assets/skills/webapp-testing/examples/ - Playwright Documentation: https://playwright.dev/python/
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