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agent-browser-automation Fast Rust-based headless browser automation CLI with Node.js fallback for AI agents, featuring navigation, clicking, typing, snapshots, and structured commands optimized for agent workflows.
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name Agent Browser Automation description Fast Rust-based headless browser automation CLI with Node.js fallback for AI agents, featuring navigation, clicking, typing, snapshots, and structured commands optimized for agent workflows. version 1.0.0 author thetestingacademy license MIT tags ["browser-automation","headless-chrome","rust","ai-agents","cli","snapshots","navigation"] testingTypes ["e2e","integration","visual"] frameworks [] languages ["rust","javascript","typescript"] domains ["web"] agents ["claude-code","cursor","github-copilot","windsurf","codex","aider","continue","cline","zed","bolt"]
Agent Browser Automation Skill
You are an expert in browser automation using agent-browser, a fast Rust-based CLI tool designed specifically for AI coding agents. When the user asks you to automate browser interactions, perform web scraping, or test web applications, follow these detailed instructions.
Core Principles
Speed-first architecture -- Rust core provides millisecond-level responsiveness for agent commands.Structured output -- All commands return JSON output optimized for AI agent parsing.Fallback resilience -- Automatically falls back to Node.js implementation when Rust binary is unavailable.Agent-optimized commands -- CLI designed for programmatic control, not human interaction.Snapshot-driven debugging -- Every action can capture page snapshots for AI agent analysis.
Installation
npm install -g agent-browser
npx agent-browser --version
agent-browser --help
Project Structure for Agent-Driven Testing
tests/
browser-automation/
scenarios/
login-flow.json
checkout-flow.json
search-navigation.json
snapshots/
login-success.png
cart-state.png
scripts/
run-scenario.sh
batch-test.sh
config/
browser-config.json
viewport-sizes.json
Core Commands
Navigation Commands
agent-browser navigate --url "https://example.com"
agent-browser navigate --url "https://example.com" --viewport "1920x1080"
agent-browser navigate --url "https://example.com" \
--user-agent "Mozilla/5.0 (iPhone; CPU iPhone OS 14_0 like Mac OS X)"
agent-browser navigate --url "https://example.com" --wait-until "networkidle"
Output:
{
"success"
:
true
,
"url"
:
"https://example.com"
,
"title"
:
"Example Domain"
,
"loadTime"
:
234
,
"timestamp"
:
"2024-02-12T10:30:00Z"
}
Clicking Elements
agent-browser click --selector "button#submit"
agent-browser click --text "Sign In"
agent-browser click --selector ".dropdown" --offset "10,20"
agent-browser click --selector "button.load-more" --wait 5000
{
"success" : true ,
"element" : "button#submit" ,
"action" : "click" ,
"timestamp" : "2024-02-12T10:30:01Z"
}
Typing Input
agent-browser type --selector "input#email" --text "user@example.com"
agent-browser type --selector "input#search" --text "automation" --delay 50
agent-browser type --selector "input#search" --text "query" --enter
agent-browser type --selector "input#username" --text "newuser" --clear
{
"success" : true ,
"element" : "input#email" ,
"action" : "type" ,
"length" : 17 ,
"timestamp" : "2024-02-12T10:30:02Z"
}
Taking Snapshots
agent-browser snapshot --output "screenshot.png"
agent-browser snapshot --selector "#content" --output "content.png"
agent-browser snapshot --viewport "1920x1080" --output "desktop.png"
agent-browser snapshot --format "html" --output "page.html"
agent-browser snapshot --format "pdf" --output "document.pdf"
{
"success" : true ,
"format" : "png" ,
"path" : "screenshot.png" ,
"size" : 245678 ,
"dimensions" : {
"width" : 1280 ,
"height" : 720
} ,
"timestamp" : "2024-02-12T10:30:03Z"
}
Extracting Data
agent-browser extract --selector "h1.title" --attribute "text"
agent-browser extract --selector "a.link" --attribute "href"
agent-browser extract --selector "li.item" --all
agent-browser extract --selector ".product-card" --json \
--fields "title:.title,price:.price,image:img@src"
{
"success" : true ,
"selector" : "h1.title" ,
"results" : [
{
"text" : "Welcome to Our Site" ,
"visible" : true }
] ,
"count" : 1 ,
"timestamp" : "2024-02-12T10:30:04Z"
}
Waiting for Elements
agent-browser wait --selector ".loading-complete" --timeout 10000
agent-browser wait --selector ".spinner" --hidden --timeout 5000
agent-browser wait --text "Success" --timeout 3000
agent-browser wait --script "document.readyState === 'complete'"
{
"success" : true ,
"condition" : "element_visible" ,
"selector" : ".loading-complete" ,
"waited" : 1234 ,
"timestamp" : "2024-02-12T10:30:05Z"
}
Scenario-Based Automation
Login Flow Example #!/bin/bash
agent-browser navigate --url "https://app.example.com/login"
agent-browser type --selector "input#email" --text "user@example.com"
agent-browser type --selector "input#password" --text "$PASSWORD "
agent-browser click --selector "button[type='submit']"
agent-browser wait --selector ".dashboard" --timeout 5000
agent-browser snapshot --output "login-success.png"
agent-browser extract --selector ".user-name" --attribute "text"
E2E Shopping Flow #!/bin/bash
set -e
echo "Starting checkout flow test..."
agent-browser navigate --url "https://shop.example.com/products/widget-123"
agent-browser wait --selector ".product-details" --timeout 5000
agent-browser click --selector "button.add-to-cart"
agent-browser wait --text "Added to cart" --timeout 3000
agent-browser click --selector ".cart-icon"
agent-browser wait --selector ".cart-items" --timeout 2000
agent-browser snapshot --selector ".cart-summary" --output "cart-state.png"
agent-browser click --text "Proceed to Checkout"
agent-browser wait --selector ".checkout-form" --timeout 5000
agent-browser type --selector "#shipping-name" --text "John Doe"
agent-browser type --selector "#shipping-address" --text "123 Main St"
agent-browser type --selector "#shipping-city" --text "San Francisco"
agent-browser snapshot --output "checkout-complete.png"
echo "Checkout flow completed successfully"
Integration with AI Agent Workflows
TypeScript/JavaScript Integration import { execSync } from 'child_process' ;
interface BrowserResult {
success : boolean ;
[key : string ]: any ;
}
class AgentBrowser {
private baseCommand = 'agent-browser' ;
async navigate (url : string , options : { viewport ?: string ; waitUntil ?: string } = {}): Promise <BrowserResult > {
const args = [`navigate` , `--url` , `"${url} "` ];
if (options.viewport ) args.push (`--viewport` , options.viewport );
if (options.waitUntil ) args.push (`--wait-until` , options.waitUntil );
return this .exec (args);
}
async click (selector : string , options : { wait ?: number ; offset ?: string } = {}): Promise <BrowserResult > {
const args = [`click` , `--selector` , `"${selector} "` ];
if (options.wait ) args.push (`--wait` , options.wait .toString ());
if (options.offset ) args.push (`--offset` , options.offset );
return this .exec (args);
}
async type (selector : string , text : string , options : { delay ?: number ; enter ?: boolean ; clear ?: boolean } = {}): Promise <BrowserResult > {
const args = [`type` , `--selector` , `"${selector} "` , `--text` , `"${text} "` ];
if (options.delay ) args.push (`--delay` , options.delay .toString ());
if (options.enter ) args.push (`--enter` );
if (options.clear ) args.push (`--clear` );
return this .exec (args);
}
async snapshot (output : string , options : { format ?: string ; selector ?: string ; viewport ?: string } = {}): Promise <BrowserResult > {
const args = [`snapshot` , `--output` , `"${output} "` ];
if (options.format ) args.push (`--format` , options.format );
if (options.selector ) args.push (`--selector` , `"${options.selector} "` );
if (options.viewport ) args.push (`--viewport` , options.viewport );
return this .exec (args);
}
async extract (selector : string , options : { attribute ?: string ; all ?: boolean ; json ?: boolean } = {}): Promise <BrowserResult > {
const args = [`extract` , `--selector` , `"${selector} "` ];
if (options.attribute ) args.push (`--attribute` , options.attribute );
if (options.all ) args.push (`--all` );
if (options.json ) args.push (`--json` );
return this .exec (args);
}
private exec (args : string []): BrowserResult {
const command = `${this .baseCommand} ${args.join(' ' )} ` ;
try {
const output = execSync (command, { encoding : 'utf-8' });
return JSON .parse (output);
} catch (error : any ) {
return {
success : false ,
error : error.message ,
command,
};
}
}
}
async function testLoginFlow (const browser = new AgentBrowser ();
const navResult = await browser.navigate ('https://app.example.com/login' , {
waitUntil : 'networkidle' ,
});
if (!navResult.success ) {
throw new Error (`Navigation failed: ${navResult.error} ` );
}
await browser.type ('#email' , 'user@example.com' );
await browser.type ('#password' , process.env .PASSWORD || '' , { enter : true });
await browser.wait ('.dashboard' , { timeout : 5000 });
await browser.snapshot ('login-success.png' );
console .log ('Login test completed successfully' );
}
Python Integration import json
import subprocess
from typing import Dict , Any , Optional
class AgentBrowser :
def __init__ (self, browser_path: str = "agent-browser" ):
self .browser_path = browser_path
def navigate (self, url: str , viewport: Optional [str ] = None , wait_until: Optional [str ] = None ) -> Dict [str , Any ]:
args = [self .browser_path, "navigate" , "--url" , url]
if viewport:
args.extend(["--viewport" , viewport])
if wait_until:
args.extend(["--wait-until" , wait_until])
return self ._exec (args)
def click (self, selector: str , wait: Optional [int ] = None , offset: Optional [str ] = None ) -> Dict [str , Any ]:
args = [self .browser_path, "click" , "--selector" , selector]
if wait:
args.extend(["--wait" , str (wait)])
if offset:
args.extend(["--offset" , offset])
return self ._exec (args)
def type (self, selector: str , text: str , delay: Optional [int ] = None , enter: bool = False , clear: bool = False ) -> Dict [str , Any ]:
args = [self .browser_path, "type" , "--selector" , selector, "--text" , text]
if delay:
args.extend(["--delay" , str (delay)])
if enter:
args.append("--enter" )
if clear:
args.append("--clear" )
return self ._exec (args)
def snapshot (self, output: str , format : Optional [str ] = None , selector: Optional [str ] = None ) -> Dict [str , Any ]:
args = [self .browser_path, "snapshot" , "--output" , output]
if format :
args.extend(["--format" , format ])
if selector:
args.extend(["--selector" , selector])
return self ._exec (args)
def extract (self, selector: str , attribute: Optional [str ] = None , all : bool = False ) -> Dict [str , Any ]:
args = [self .browser_path, "extract" , "--selector" , selector]
if attribute:
args.extend(["--attribute" , attribute])
if all :
args.append("--all" )
return self ._exec (args)
def _exec (self, args: list ) -> Dict [str , Any ]:
try :
result = subprocess.run(args, capture_output=True , text=True , check=True )
return json.loads(result.stdout)
except subprocess.CalledProcessError as e:
return {
"success" : False ,
"error" : e.stderr,
"command" : " " .join(args)
}
def test_search_flow ():
browser = AgentBrowser()
nav = browser.navigate("https://example.com/search" )
assert nav["success" ], f"Navigation failed: {nav.get('error' )} "
browser.type ("input#search" , "automation testing" , enter=True )
browser.wait(".search-results" , timeout=5000 )
results = browser.extract(".result-item h3" , attribute="text" , all =True )
print (f"Found {len (results.get('results' , []))} search results" )
browser.snapshot("search-results.png" )
Configuration Management
Browser Config File {
"viewport" : {
"width" : 1920 ,
"height" : 1080
} ,
"userAgent" : "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36" ,
"timeout" : {
"navigation" : 30000 ,
"element" : 10000 ,
"network" : 5000
} ,
"screenshot" : {
"format" : "png" ,
"quality" : 80 ,
"fullPage" : true } ,
"headless" : true ,
"slowMo" : 0 ,
"devtools" : false }
Load Config in Commands
agent-browser --config ./browser-config.json navigate --url "https://example.com"
agent-browser --config ./browser-config.json --viewport "1280x720" navigate --url "https://example.com"
Performance Optimization
Rust vs Node.js Performance Rust Implementation Benefits:
10-50x faster command execution
Lower memory footprint (20-30 MB vs 100+ MB for Node.js)
Instant startup time (<100ms vs 500-1000ms)
Compiled binary distribution (no runtime dependencies)
When Node.js Fallback Activates:
Rust binary not available for platform
Specific browser features requiring Node.js Puppeteer/Playwright
Debug mode requiring Chrome DevTools Protocol
Batch Command Optimization
agent-browser chain \
"navigate --url https://example.com" \
"type --selector #search --text query" \
"click --selector button" \
"wait --selector .results" \
"snapshot --output results.png"
Best Practices
Use JSON output parsing -- Always parse JSON responses for reliable AI agent integration.Implement retry logic -- Network issues and timing can cause transient failures.Take snapshots liberally -- Visual snapshots help AI agents understand page state.Use semantic selectors -- Prefer IDs and stable data attributes over brittle CSS selectors.Set appropriate timeouts -- Balance speed with reliability based on page complexity.Chain related commands -- Use command chaining to reduce overhead.Cache browser instances -- Reuse browser contexts for faster subsequent commands.Validate responses -- Check success field before proceeding with workflow.Log all actions -- Maintain audit trail for debugging and compliance.Use structured scenarios -- Define reusable JSON scenarios for common flows.
Anti-Patterns to Avoid
Hardcoded waits -- Avoid fixed delays; use element waiting instead.Ignoring errors -- Always check success field and handle failures gracefully.Over-reliance on XPath -- Prefer CSS selectors for better performance.Snapshot overload -- Don't snapshot every step; focus on key states.Single-use scripts -- Create reusable functions instead of one-off scripts.No error recovery -- Implement retry and fallback mechanisms.Unvalidated input -- Sanitize and validate all user input before typing.Resource leaks -- Always close browser instances when done.Ignoring performance -- Monitor command execution times and optimize.Poor selector strategies -- Avoid deep nesting and position-dependent selectors.
Common Scenarios
Form Automation
agent-browser navigate --url "https://app.example.com/register"
agent-browser type --selector "#firstName" --text "John"
agent-browser type --selector "#lastName" --text "Doe"
agent-browser type --selector "#email" --text "john@example.com"
agent-browser type --selector "#password" --text "SecurePass123!"
agent-browser click --selector "#terms-checkbox"
agent-browser click --selector "button[type='submit']"
agent-browser wait --text "Registration successful" --timeout 5000
agent-browser snapshot --output "registration-success.png"
Data Extraction
agent-browser navigate --url "https://shop.example.com/products"
agent-browser wait --selector ".product-grid" --timeout 5000
agent-browser extract --selector ".product-card" --json \
--fields "name:.product-name,price:.product-price,rating:.rating" \
--all > products.json
Multi-Step Workflow
agent-browser navigate --url "https://dashboard.example.com"
agent-browser wait --selector ".dashboard-loaded" --timeout 10000
agent-browser click --selector "a[href='/analytics']"
agent-browser wait --selector ".chart-container" --timeout 5000
agent-browser click --selector "button.date-filter"
agent-browser click --text "Last 30 days"
agent-browser wait --selector ".chart-updated" --timeout 3000
agent-browser snapshot --selector ".analytics-panel" --output "analytics.png"
Debugging and Troubleshooting
Enable Debug Mode
agent-browser --debug navigate --url "https://example.com"
agent-browser --headless false navigate --url "https://example.com"
agent-browser --console-log ./console.log navigate --url "https://example.com"
Error Handling async function robustBrowserAction (action : () => Promise <BrowserResult >Promise <BrowserResult > {
const maxRetries = 3 ;
let lastError : any ;
for (let i = 0 ; i < maxRetries; i++) {
try {
const result = await action ();
if (result.success ) {
return result;
}
lastError = result.error ;
} catch (error) {
lastError = error;
}
await new Promise (resolve =>setTimeout (resolve, Math .pow (2 , i) * 1000 ));
}
throw new Error (`Action failed after ${maxRetries} retries: ${lastError} ` );
}
Integration with AI Agents When AI agents use agent-browser, they should:
Parse JSON responses to understand command resultsAnalyze snapshots to verify visual stateAdapt selectors based on page structureHandle errors gracefully with retry logicChain commands efficiently to minimize overheadValidate outcomes by checking both JSON and visual snapshotsMaintain context across multi-step flowsLearn from failures by analyzing error messages and snapshots This tool empowers AI agents to interact with web applications at high speed with structured, parseable output optimized for autonomous decision-making.
