VS Code Extensions
Code Guardian

Code Guardian

by MarcosAraujo

Code Guardian is a local C# code review tool for Visual Studio that detects security vulnerabilities, code smells, performance issues, and reliability problems with actionable reports and risk scores.

Downloads

75

Rating

— (0)

Version

1.0.10

Last updated

Jun 02, 2026

Automated C# code review integrated into Visual Studio. Code Guardian analyzes your C# files on demand — detecting security vulnerabilities, bad practices, code smells, and quality metrics — and surfaces results directly in the Error List, Tool Window, and a full HTML report.

No cloud. No external services. Runs entirely on your machine.

What it detects

Category Examples
Security SQL Injection, hardcoded secrets, path traversal, dangerous deserialization
Reliability Swallowed exceptions, empty catch blocks, unbounded loops
Performance N+1 query patterns, string concatenation in loops, missing CancellationToken
Clean Code God Class, methods over 30 lines, deep nesting (5+ levels), magic numbers
Async/Await .Result / .Wait() deadlock patterns, fire-and-forget without error handling

Features

🎯 Risk Score 0–100

Every analysis produces a visual Risk Score — green (low risk) through red (critical).

Score Label
0–10 Low Risk
11–30 Moderate
31–60 High Risk
61–100 Critical

📋 Error List Integration

All issues appear in the Visual Studio Error List with severity, rule ID, file name, and line number — click to navigate directly to the problem.

🪟 Tool Window Panel

Open via Tools → Code Guardian to see:

  • Risk Score with color-coded progress bar
  • Issue counts by severity (Critical / Error / Warning / Info)
  • Full issue list with message, rule ID, file, and line
  • Code metrics per file (total lines, method size, nesting depth, coupling)

🌐 HTML Report

One-click self-contained HTML report with dark theme — risk summary, metrics table, and full issues list with severity badges.

🔗 Git Hooks

Install a pre-commit hook via Tools → Code Guardian: Install Git Hooks to automatically block commits containing critical issues.

Requirements

Requirement Details
Visual Studio 2019 (16.x) or 2022 (17.x) — Community, Professional, or Enterprise
Python 3.8 or later — must be on PATH or configured in settings
Code Guardian scripts The code_guardian/ folder in your repository root

The analysis engine (Python scripts) is open-source and available at: github.com/marcosaraujo-dev/code-guardian

Quick Start

  1. Install the extension from the Marketplace
  2. Clone or copy the code_guardian/ folder into your repository root
  3. Open a solution in Visual Studio
  4. Tools → Analyze Current File or right-click the solution → Analyze with Code Guardian
  5. View results in the Error List and Tools → Code Guardian panel

Commands

Command Location
Code Guardian Tools menu — opens the Tool Window
Analyze Current File Tools menu — analyzes the active .cs file
Analyze with Code Guardian Solution Explorer context menu — full solution scan
Install Git Hooks Tools menu — installs pre-commit hook

Developed by CygnusForge — free and open source.