Add Amazon Bedrock AgentCore Browser support

[jsamuel1]

Description of the feature request:

Add support for Amazon Bedrock AgentCore Browser as a backend environment, enabling cloud-based browser automation with enhanced security and scalability features.

What problem are you trying to solve with this feature?

AgentCore Browser provides a managed, serverless browser environment that offers:

• Cloud-based browser execution without local resource requirements
• Built-in session recording for debugging and compliance
• Browser signing for reduced CAPTCHA challenges via cryptographic agent identification
• Automatic scaling and resource management
• Integration with AWS security and IAM

Any other information you'd like to share?

Add AgentCore as a third environment option alongside Playwright and Browserbase:

Core Features

• AgentCoreComputer class with CDP connection to AgentCore Browser
• Browser signing enabled for cryptographic agent identification
• Session recording to S3 with configurable bucket and prefix
• Auto-created IAM roles with minimal scoped permissions
• Region detection with fallback chain
• Browser reuse logic to avoid duplicate browser creation

CLI Arguments

• --env=agentcore: Use AgentCore browser backend
• --recording_bucket: S3 bucket for session recordings
• --recording_prefix: S3 prefix for recordings (default: "recordings")
• --execution_role_arn: IAM role ARN for browser execution
• --create_execution_role: Auto-create IAM role if needed
• --browser_identifier: Browser identifier (default: "aws.browser.v1")

Dependencies

• boto3>=1.40.64
• bedrock-agentcore>=1.0.5

Implementation

A complete implementation is available in PR #78

Benefits

• No local browser installation required
• Serverless scaling for multiple concurrent sessions
• Built-in session replay for debugging
• Reduced CAPTCHA challenges with browser signing
• AWS-native security and compliance features

Related

• AWS Blog: Reduce CAPTCHAs for AI agents browsing the web with Web Bot Auth