/codeguard

name: codeguard
description: A CodeGuard security skill that helps AI coding agents write secure code and prevent common vulnerabilities. Use this skill when writing, reviewing, or modifying code to ensure secure-by-default practices are followed.
codeguard-version: "1.4.0"
framework: "Project CodeGuard"
purpose: "Embed secure-by-default practices into AI coding workflows"

CodeGuard Skill

This skill provides comprehensive security guidance to help AI coding agents generate secure code and prevent common vulnerabilities. It is based on **Project CodeGuard**, an open-source, model-agnostic security framework that embeds secure-by-default practices into AI coding workflows.

When to Use This Skill

This skill should be activated when:

• Writing new code in any language
• Reviewing or modifying existing code
• Implementing security-sensitive features (authentication, cryptography, data handling, etc.)
• Working with user input, databases, APIs, or external services
• Configuring cloud infrastructure, CI/CD pipelines, or containers
• Handling sensitive data, credentials, or cryptographic operations

How to Use This Skill

When writing or reviewing code: 1. Always-Apply Rules: Some rules MUST be checked on every code operation:

• `codeguard-1-hardcoded-credentials.md` - Never hardcode secrets, passwords, API keys, or tokens
• `codeguard-1-crypto-algorithms.md` - Use only modern, secure cryptographic algorithms
• `codeguard-1-digital-certificates.md` - Validate and manage digital certificates securely

2. Tag-Based Rules: When you identify any of these security contexts in the code, apply ALL rules with the matching tag:

| Security Context (Tag) | Rule Files to Apply | |------------------------|---------------------| | authentication | codeguard-0-authentication-mfa.md, codeguard-0-session-management-and-cookies.md | | data-security | codeguard-0-additional-cryptography.md, codeguard-0-data-storage.md | | infrastructure | codeguard-0-cloud-orchestration-kubernetes.md, codeguard-0-data-storage.md, codeguard-0-devops-ci-cd-containers.md, codeguard-0-iac-security.md | | privacy | codeguard-0-logging.md, codeguard-0-privacy-data-protection.md | | secrets | codeguard-0-additional-cryptography.md, codeguard-1-digital-certificates.md, codeguard-1-hardcoded-credentials.md | | web | codeguard-0-api-web-services.md, codeguard-0-authentication-mfa.md, codeguard-0-client-side-web-security.md, codeguard-0-input-validation-injection.md, codeguard-0-session-management-and-cookies.md |

3. Language-Specific Rules: Apply rules from /rules directory based on the programming language of the feature being implemented using the table given below:

| Language | Rule Files to Apply | |----------|---------------------| | apex | codeguard-0-input-validation-injection.md | | c | codeguard-0-additional-cryptography.md, codeguard-0-api-web-services.md, codeguard-0-authentication-mfa.md, codeguard-0-authorization-access-control.md, codeguard-0-client-side-web-security.md, codeguard-0-data-storage.md, codeguard-0-file-handling-and-uploads.md, codeguard-0-framework-and-languages.md, codeguard-0-iac-security.md, codeguard-0-input-validation-injection.md, codeguard-0-logging.md, codeguard-0-safe-c-functions.md, codeguard-0-session-management-and-cookies.md, codeguard-0-xml-and-serialization.md | | cpp | codeguard-0-safe-c-functions.md | | d | codeguard-0-iac-security.md | | docker | codeguard-0-devops-ci-cd-containers.md, codeguard-0-supply-chain-security.md | | go | codeguard-0-additional-cryptography.md, codeguard-0-api-web-services.md, codeguard-0-authentication-mfa.md, codeguard-0-authorization-access-control.md, codeguard-0-file-handling-and-uploads.md, codeguard-0-input-validation-injection.md, codeguard-0-mcp-security.md, codeguard-0-session-management-and-cookies.md, codeguard-0-xml-and-serialization.md | | hcl | codeguard-0-iac-security.md | | html | codeguard-0-client-side-web-security.md, codeguard-0-input-validation-injection.md, codeguard-0-session-management-and-cookies.md | | java | codeguard-0-additional-cryptography.md, codeguard-0-api-web-services.md, codeguard-0-authentication-mfa.md, codeguard-0-authorization-access-control.md, codeguard-0-file-handling-and-uploads.md, codeguard-0-framework-and-languages.md, codeguard-0-input-validation-injection.md, codeguard-0-mcp-security.md, codeguard-0-mobile-apps.md, codeguard-0-session-management-and-cookies.md, codeguard-0-xml-and-serialization.md | | javascript | codeguard-0-additional-cryptography.md, codeguard-0-api-web-services.md, codeguard-0-authentication-mfa.md, codeguard-0-authorization-access-control.md, codeguard-0-client-side-web-security.md, codeguard-0-cloud-orchestration-kubernetes.md, codeguard-0-data-storage.md, codeguard-0-devops-ci-cd-containers.md, codeguard-0-file-handling-and-uploads.md, codeguard-0-framework-and-languages.md, codeguard-0-iac-security.md, codeguard-0-input-validation-injection.md, codeguard-0-logging.md, codeguard-0-mcp-security.md, codeguard-0-mobile-apps.md, codeguard-0-privacy-data-protection.md, codeguard-0-session-management-and-cookies.md, codeguard-0-supply-chain-security.md | | kotlin | codeguard-0-additional-cryptography.md, codeguard-0-authentication-mfa.md, codeguard-0-framework-and-languages.md, codeguard-0-mobile-apps.md | | matlab | codeguard-0-additional-cryptography.md, codeguard-0-authentication-mfa.md, codeguard-0-mobile-apps.md, codeguard-0-privacy-data-protection.md | | perl | codeguard-0-mobile-apps.md | | php | codeguard-0-additional-cryptography.md, codeguard-0-api-web-services.md, codeguard-0-authentication-mfa.md, codeguard-0-authorization-access-control.md, codeguard-0-client-side-web-security.md, codeguard-0-file-handling-and-uploads.md, codeguard-0-framework-and-languages.md, codeguard-0-input-validation-injection.md, codeguard-0-session-management-and-cookies.md, codeguard-0-xml-and-serialization.md | | powershell | codeguard-0-devops-ci-cd-containers.md, codeguard-0-iac-security.m