Security Guidance

Security review for Claude-generated code. Pattern-based warnings on edits, LLM-powered diff review on Stop, and an agentic commit reviewer that catches injection, XSS, SSRF, hardcoded secrets, and 25+ other vulnerability classes.

  • Install in
  • Plugin sourceView source
  • Installs241,800

A security reminder hook that automatically warns about potential security vulnerabilities when Claude edits files. The plugin intercepts Write, Edit, and MultiEdit operations and scans code for dangerous patterns before changes are applied.

The plugin detects eight major vulnerability categories including command injection in GitHub Actions workflows, unsafe child_process.exec() calls, eval() and new Function() usage, XSS vectors like dangerouslySetInnerHTML and innerHTML, Python pickle deserialization risks, and os.system() command injection.

How it works: The plugin runs automatically as a pre-tool hook - no commands needed. When Claude attempts to write code containing potentially unsafe patterns, you'll see a warning with specific remediation advice before the edit proceeds. Warnings are session-scoped so you only see each one once.

Example warnings you might see:

  • Suggestions to use execFileNoThrow() instead of child_process.exec() to prevent shell injection
  • Alerts about XSS risks when using innerHTML or dangerouslySetInnerHTML
  • Warnings about GitHub Actions injection when editing workflow files

Other plugins

Frontend Design

Frontend design skill for UI/UX implementation

Superpowers

Core skills library for Claude Code: TDD, debugging, collaboration patterns, and proven techniques

Code Review

Automated code review for pull requests using multiple specialized agents with confidence-based scoring

Context7

Upstash Context7 MCP server for up-to-date documentation lookup. Connects to Context7's hosted remote MCP server (https://mcp.context7.com/mcp) — no local Node.js or npx required — to pull version-specific documentation and code examples directly from source repositories into your LLM context. Authenticate with Context7 when prompted.

Code Simplifier

Agent that simplifies and refines code for clarity, consistency, and maintainability while preserving functionality

Playwright

Browser automation and end-to-end testing MCP server by Microsoft. Enables Claude to interact with web pages, take screenshots, fill forms, click elements, and perform automated browser testing workflows.