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HOL Guard

HOL Guard

AI

HOL Guard sits between AI coding agents and their tools to intercept risky reads, installs, MCP registrations, and config changes before execution.

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Starting from Free
Premium plans available

About HOL Guard

HOL Guard is a local-first runtime security layer that wraps AI coding agents such as Claude Code, Codex, Cursor, OpenCode, Gemini CLI, Hermes, and OpenClaw, scanning every command they attempt before it runs. It intercepts shell commands, secret reads, MCP server registrations, and config or hook changes, showing a diff so the developer can approve or deny with one keystroke. Scans run on-device in under 50 ms with no network call, and the tool ships as a pipx-installable daemon that leaves no background services when uninstalled. Guard is free forever for local scanning on one machine, with paid Guard Cloud tiers that sync decision receipts across machines, add alerts, and enforce team policies. The maker, HOL, also publishes a companion plugin-scanner for maintainers so extension packages can be verified in CI before release.

Screenshots

HOL Guard screenshot 1
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Key Features

Pre-execution Interception: Wraps agent launch commands so risky reads, installs, MCP registrations, and config or hook changes are surfaced as a reviewable diff before they run.
Under 50 ms Local Scan: All scanning happens on-device with no outbound network call, keeping agent workflows fast and usable fully offline.
One-keystroke Approval Flow: Each block presents the diff on screen so the developer can allow or deny with a single key, and the decision is written to a local receipt.
Multi-Harness Support: Ships tailored integrations for Claude Code, Codex, Cursor, OpenCode, Gemini CLI, Hermes, and OpenClaw so the same policy engine covers every agent.
Guard Cloud Sync: Optional cloud tier syncs decision receipts, alerts, and audit history across machines while never uploading file contents, prompts, or environment variables.
Team Policy Packs: Team plan deploys shared policy packs, team alerts, and investigation routing so multiple developers operate under the same runtime rules.
Plugin Scanner for Maintainers: Companion CLI and GitHub Action verify plugin manifests, MCP transport posture, and skill-level prompt-injection markers before release.

Use Cases

Blocking secret exfiltration: Stop a coding agent from reading .npmrc, .env, or cloud credential files during an automated task.
Guarding MCP installs: Review new MCP server registrations for insecure HTTP endpoints or wildcard binds before they are added to the harness.
Enforcing config approvals: Require an explicit allow on config or hook edits proposed by an agent so surprise supply-chain changes are caught in place.
Team-wide policy control: Roll out a single Guard policy pack across a team so every developer's Cursor or Claude Code session enforces the same runtime rules.
Cross-device continuity: Sync approval history through Guard Cloud so switching laptops does not force a developer to re-approve safe actions from scratch.
Plugin release gating: Use the plugin-scanner action in CI to fail PRs that publish plugins below a minimum trust score or with high-severity issues.

Frequently asked questions about HOL Guard

What is HOL Guard?

HOL Guard is an advanced security layer that operates between AI coding agents and their development tools. It proactively intercepts potential threats by monitoring and blocking risky reads, installations, MCP registrations, and configuration changes before they can execute, ensuring a safer coding environment.

Key Points

  • Risk Management: HOL Guard prevents risky operations from executing.
  • Real-Time Monitoring: Continuously analyzes AI coding agents' activities.
  • Integration: Works seamlessly with various development tools.

Detailed Explanation

HOL Guard functions as a protective barrier, effectively analyzing the behavior of AI coding agents. For instance, when an AI tool attempts to install software or modify system configurations, HOL Guard evaluates the request's safety. If it detects any potential risks—such as unauthorized changes or malicious code—it blocks the execution, thereby safeguarding the system.

This capability is crucial in environments where AI tools are extensively used for coding, as these tools can inadvertently introduce vulnerabilities. By monitoring actions like file reads and software installations, HOL Guard ensures that only safe operations are permitted. This real-time protection reduces the risk of security breaches and system malfunctions, making it an essential tool for organizations leveraging AI in their development processes.

Use Cases

  • Development Teams: Teams using AI coding assistants can rely on HOL Guard to prevent unintended errors or security issues.
  • Enterprise Environments: Large organizations can integrate HOL Guard to maintain compliance and protect sensitive data.
  • Continuous Integration/Continuous Deployment (CI/CD): HOL Guard enhances the security of the CI/CD pipeline by validating code changes before deployment.

Best Practices / Tips

  • Integration: Ensure that HOL Guard is integrated into your development workflow from the beginning to maximize its effectiveness.
  • Regular Updates: Keep HOL Guard updated to benefit from the latest security features and enhancements.
  • Monitoring Alerts: Set up alerts to notify your team of any blocked actions, allowing for quick responses to potential threats.

Additional Resources

How does HOL Guard work?

HOL Guard enhances software security by intercepting commands before execution, scanning locally without internet dependency, and facilitating one-keystroke approvals. It integrates with various coding environments to prevent unauthorized actions, manage configurations, and maintain policy consistency across devices, ensuring developers work safely and efficiently.

Key Points

  • Pre-execution Interception: Monitors command executions for security.
  • Local Scanning: Executes all scans on-device without network calls.
  • One-keystroke Approval Flow: Simplifies decision-making for developers.

Detailed Explanation

HOL Guard operates through a multi-faceted approach to software security, focusing on real-time command monitoring and user-friendly approval processes:

  1. Pre-execution Interception: HOL Guard wraps agent launch commands, allowing developers to review potential risks associated with operations such as file reads, installations, and configuration changes. By presenting these as a reviewable diff, it ensures that developers can identify and mitigate risks before execution.

  2. Under 50 ms Local Scan: The tool conducts all scanning processes on-device, eliminating the need for outbound network calls. This feature significantly speeds up workflows and allows developers to work offline without sacrificing security.

  3. One-keystroke Approval Flow: Each potential action is displayed on the screen as a diff, enabling developers to approve or deny actions with a single keystroke. This decision is recorded in a local receipt, providing a clear audit trail.

  4. Multi-Harness Support: HOL Guard integrates seamlessly with various coding environments, including Claude Code, Codex, Cursor, OpenCode, Gemini CLI, Hermes, and OpenClaw. This integration allows for consistent security policies across different agents and environments.

  5. Guard Cloud Sync: For teams that require cross-device functionality, HOL Guard offers an optional cloud sync. This feature ensures decision receipts, alerts, and audit histories are synchronized across devices while never compromising sensitive data by uploading file contents or environment variables.

Best Practices / Tips

  • Regularly Update Policies: Ensure that security policies are current and reflect the latest threats and development practices.
  • Use the Review Feature: Always utilize the reviewable diffs provided by HOL Guard to catch potential security issues early.
  • Train Your Team: Educate your development team on the importance of security protocols and how to effectively use HOL Guard to minimize risks.

Additional Resources

What are the main features of HOL Guard?

HOL Guard features include pre-execution interception to review risky actions, a local scan process for fast scanning without internet dependence, a one-keystroke approval flow for easy decisions, multi-harness support for various AI tools, and optional Guard Cloud Sync for decision management across devices.

Key Points

  • Pre-execution Interception: Review potentially harmful actions before execution.
  • Under 50 ms Local Scan: Fast, offline scanning directly on the device.
  • One-keystroke Approval Flow: Simplified decision-making for developers.

Detailed Explanation

HOL Guard is designed to enhance security and usability in AI tool deployments. The pre-execution interception feature allows developers to review any commands that could lead to risky changes, such as installations or configurations, by presenting a comparison (diff) before execution. This ensures that any potential issues are identified and resolved upfront, significantly reducing the risk of unexpected behavior.

The under 50 ms local scan functionality is crucial for maintaining workflow efficiency. By performing scans on-device, HOL Guard eliminates the need for outbound network calls, allowing the agent to function seamlessly, even in offline environments. This is particularly beneficial in scenarios where network reliability is a concern.

The one-keystroke approval flow streamlines the decision-making process. Each action requiring approval displays the relevant diff on-screen, enabling developers to allow or deny actions with a single keystroke. This not only speeds up workflows but also maintains a record of decisions through local receipt generation, ensuring accountability.

Additionally, HOL Guard supports multiple AI harnesses, including Claude Code, Codex, Cursor, OpenCode, Gemini CLI, Hermes, and OpenClaw. This multi-harness support ensures that a unified policy engine can manage various agents, simplifying the integration process for developers working with different tools.

For those who require additional data management capabilities, Guard Cloud Sync offers an optional cloud tier that syncs decision receipts, alerts, and audit histories across multiple devices. Importantly, this feature ensures that sensitive data, like file contents or environment variables, are never uploaded, maintaining user privacy.

Best Practices / Tips

  • Regularly review the diffs provided by the pre-execution interception feature to catch potential issues early.
  • Utilize the local scan capability to ensure smooth operation during offline sessions, especially in environments with unstable internet connections.
  • Train your team on the one-keystroke approval flow to maximize efficiency and minimize delays in decision-making.

Additional Resources

Who is HOL Guard for?

HOL Guard is designed for developers and teams seeking enhanced security in their coding environments. It protects against secret exfiltration, verifies the security of new server registrations, enforces configuration approvals, maintains team-wide policy control, and ensures cross-device continuity for seamless development.

Key Points

  • Blocking Secret Exfiltration: Prevents unauthorized access to sensitive files.
  • Guarding MCP Installs: Checks new server registrations for vulnerabilities.
  • Enforcing Config Approvals: Requires explicit permissions for configuration changes.

Detailed Explanation

HOL Guard serves a diverse audience, particularly software developers and IT teams concerned with securing their coding practices. Here’s a breakdown of its primary features:

  1. Blocking Secret Exfiltration: HOL Guard actively monitors automated tasks to stop coding agents from accessing sensitive files like .npmrc, .env, or cloud credentials. This prevents unauthorized data leaks that could compromise security.

  2. Guarding MCP Installs: When new server registrations are added to the harness, HOL Guard reviews them for insecure HTTP endpoints or wildcard binds. This proactive measure ensures that only secure configurations are deployed, reducing the risk of vulnerabilities in the infrastructure.

  3. Enforcing Config Approvals: With HOL Guard, any proposed edits to configurations or hooks by coding agents require explicit approval. This feature is crucial in preventing unexpected supply-chain changes that could disrupt workflows or introduce security risks.

  4. Team-wide Policy Control: HOL Guard allows teams to implement a consistent policy pack across all members. This ensures that every developer’s coding session adheres to the same security rules, fostering a uniform security posture within the team.

  5. Cross-device Continuity: By syncing approval history through Guard Cloud, developers can switch devices without losing their safe action approvals. This feature enhances flexibility and efficiency, allowing developers to maintain productivity regardless of their working environment.

Best Practices / Tips

  • Regularly Review Policies: Ensure that the policy packs you roll out are up-to-date with current security standards.
  • Educate Your Team: Conduct training sessions to make sure every team member understands the implications of configuration approvals.
  • Monitor Activity Logs: Utilize HOL Guard’s logging features to keep track of who approved what changes and when, enhancing accountability.

Additional Resources

How much does HOL Guard cost?

HOL Guard offers a free tier for basic use, while its paid plans start at $10 per month, providing access to advanced features such as enhanced security protocols, custom alerts, and priority support. Users can choose from various pricing options based on their needs.

Key Points

  • Free Tier: Basic functionality at no cost.
  • Paid Plans: Starting at $10 per month for advanced features.
  • Customization: Options available for tailored security solutions.

Detailed Explanation

HOL Guard is designed to cater to a wide range of users, from individuals seeking basic security to businesses needing robust protection. The free tier includes essential features such as basic monitoring and alerts, allowing users to evaluate the service without financial commitment.

For those who require more, HOL Guard’s paid plans begin at $10 per month. These plans unlock several advanced features, including:

  • Enhanced Security Protocols: Additional layers of protection against potential threats.
  • Custom Alerts: Users can set specific notifications to monitor unusual activities.
  • Priority Support: Access to faster customer service assistance for urgent issues.

HOL Guard also offers tiered pricing options, allowing users to select a plan that best fits their requirements, whether for personal use or organizational needs.

Best Practices / Tips

  • Evaluate Your Needs: Determine the level of security you require before choosing a plan.
  • Utilize the Free Tier: Take advantage of the free tier to familiarize yourself with the platform.
  • Monitor Costs: Keep an eye on your usage to avoid unexpected charges if you opt for a paid plan.

Additional Resources

How do I get started with HOL Guard?

To get started with HOL Guard, visit https://hol.org/guard to sign up for an account. Once registered, you can explore the features and functionalities of HOL Guard, including its security tools and user interface designed for optimizing your digital experience.

Key Points

  • Easy sign-up process via the HOL Guard website.
  • Access to a variety of security tools and features.
  • User-friendly interface for seamless navigation.

Detailed Explanation

Starting with HOL Guard is straightforward. Here’s a step-by-step guide:

  1. Visit the Website: Go to https://hol.org/guard.
  2. Sign Up: Click on the “Sign Up” button. You will need to provide basic information such as your name, email, and a secure password. Ensure that your email is valid, as you’ll receive a confirmation link.
  3. Email Verification: After signing up, check your email for a verification link. Click on it to activate your account.
  4. Log In: Return to the HOL Guard website and log in using your credentials.
  5. Explore Features: Once logged in, navigate the dashboard to familiarize yourself with the various security tools available, including malware detection, firewall settings, and user analytics.
  6. Set Up Preferences: Customize your security settings based on your needs. You can adjust notifications, privacy settings, and integrate additional security features.

Use cases for HOL Guard include protecting personal data, securing business transactions, and monitoring network activities. Whether you're an individual user or a business, HOL Guard provides comprehensive tools to enhance your online security.

Best Practices / Tips

  • Choose a Strong Password: Create a complex password combining letters, numbers, and symbols to enhance your account security.
  • Regularly Update Security Settings: Periodically review and update your security preferences to adapt to new threats.
  • Utilize All Features: Take full advantage of HOL Guard's tools, such as real-time alerts and incident response options, to maximize your protection.
  • Stay Informed: Keep up with the latest security updates and features released by HOL Guard to ensure you are using the platform to its fullest potential.

Additional Resources

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