This document outlines the security features, considerations, and best practices for R3B3L 4F.

The airlock system is a core security feature that controls internet access for R3B3L 4F.

The airlock intercepts all outbound HTTP requests (fetch calls) and blocks them when activated:

// Simplified implementation
window.fetch = async (input, init) => {
  if (airlockActive) {
    // Block external requests
    return new Response(JSON.stringify({
      error: 'Airlock active: Internet access is disabled'
    }), { status: 403 });
  }
  // Allow requests to proceed
  return originalFetch(input, init);
};

• Network Isolation: Prevents unauthorized data exfiltration
• API Protection: Protects API keys from being used without user knowledge
• Offline Operation: Allows operation in air-gapped environments
• User Control: Gives users explicit control over internet access

R3B3L 4F includes protection against potentially dangerous system commands.

Commands are checked against a list of dangerous patterns:

const DANGEROUS_COMMANDS = [
  'rm -rf',
  'curl | sh',
  'wget | sh',
  'sudo',
  '> /dev/',
  'mkfs',
  'dd if=',
  'format',
  ':(){:|:&};:',
  'chmod -R 777 /',
  'mv /* /dev/null'
];

const isDangerousCommand = (command) => {
  return DANGEROUS_COMMANDS.some(dangerousCmd => command.includes(dangerousCmd));
};

When a dangerous command is detected, it requires explicit confirmation:

if (isDangerousCommand(command)) {
  const confirmationToken = generateConfirmationToken(command);
  return {
    requiresConfirmation: true,
    confirmationToken,
    message: `This command is potentially dangerous. Confirm execution?`
  };
}

• Accidental Execution Prevention: Prevents accidental execution of harmful commands
• Deliberate Confirmation: Requires explicit confirmation for risky operations
• Audit Trail: Creates a record of confirmed dangerous commands

R3B3L 4F includes measures to protect API keys and sensitive credentials.

• API keys are stored in environment variables, not in the code
• Keys are never exposed in client-side code
• The .env file is excluded from version control via .gitignore
• In production, keys are stored in the deployment platform's environment variables

• Credential Protection: Prevents API key exposure
• Least Privilege: Keys are only accessible where needed
• Revocation: Keys can be easily rotated without code changes

R3B3L 4F implements a Content Security Policy to prevent various attacks.

The CSP header restricts the sources of content that can be loaded:

Content-Security-Policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'self' https://api.openai.com https://*.supabase.co;

• XSS Protection: Prevents execution of injected scripts
• Data Exfiltration Prevention: Restricts where data can be sent
• Resource Integrity: Ensures resources come from trusted sources

Proper API key management is critical for security:

1. Never commit API keys to version control
2. Use environment variables for all sensitive credentials
3. Rotate keys regularly
4. Use the principle of least privilege - only grant necessary permissions
5. Monitor API usage for unusual patterns

Data stored in localStorage has security implications:

1. Don't store sensitive information in localStorage
2. Sanitize user input before storing
3. Be aware that localStorage is accessible to any script on the same origin
4. Consider encrypting sensitive data before storing

When executing system commands:

1. Always validate and sanitize input
2. Run with least privilege
3. Implement timeouts to prevent long-running commands
4. Capture and validate output before displaying
5. Restrict command execution to necessary functionality

1. Keep dependencies updated to patch security vulnerabilities
2. Implement input validation for all user inputs
3. Use HTTPS for all external communications
4. Follow the principle of least privilege
5. Implement proper error handling that doesn't expose sensitive information
6. Use Content Security Policy to restrict resource loading
7. Regularly audit the codebase for security issues

1. Keep your API keys secure and don't share them
2. Use the airlock feature when not actively requiring internet access
3. Be cautious with dangerous commands
4. Regularly check for updates to the application
5. Be aware of the data being stored in your browser

When deploying to Netlify:

1. Use environment variables for all sensitive information
2. Enable branch deploy controls to prevent unauthorized deployments
3. Configure proper headers including CSP
4. Enable HTTPS and HSTS
5. Set up proper access controls for the Netlify site

When self-hosting:

1. Use HTTPS with valid certificates
2. Implement proper firewall rules
3. Keep the server updated with security patches
4. Use a reverse proxy like Nginx with security configurations
5. Implement rate limiting to prevent abuse

Be aware of these security limitations:

1. Browser-based security can be bypassed by determined attackers
2. The airlock only controls fetch requests, not all network access
3. localStorage is not secure for highly sensitive information
4. Command execution is inherently risky in any application

If you discover a security vulnerability:

1. Do not disclose publicly until it has been addressed
2. Report the issue to the repository maintainers
3. Provide detailed information about the vulnerability
4. Allow time for a fix before public disclosure

Regular security auditing is recommended:

1. Dependency scanning for known vulnerabilities
2. Static code analysis to identify potential issues
3. Manual code review focusing on security-critical areas
4. Penetration testing to identify exploitable vulnerabilities

Planned security improvements:

1. End-to-end encryption for sensitive data
2. Two-factor authentication for access control
3. Enhanced sandboxing for command execution
4. Improved airlock with finer-grained controls
5. Security logging and alerting for suspicious activities