Code Analyzer Skill

A comprehensive skill for analyzing code quality, detecting issues, and suggesting improvements.

Overview

This skill provides tools to analyze code files for:

• Code quality issues
• Best practice violations
• Security vulnerabilities
• Performance problems
• Style inconsistencies

Instructions

When using this skill to analyze code:

1. Understand Context: Ask about the project type and language
2. Analyze Thoroughly: Check for bugs, security issues, and performance
3. Provide Actionable Feedback: Give specific, helpful suggestions
4. Prioritize Issues: Focus on critical issues first
5. Be Constructive: Frame feedback positively

Tools

analyze

Analyzes a single code file for quality and best practices.

async function analyze(
  filePath: string,
  language: string,
  config?: AnalysisConfig
): Promise<AnalysisReport>

Parameters:

• filePath: Path to the file to analyze
• language: Programming language (javascript, typescript, python, java, etc.)
• config: Optional configuration for analysis rules

Returns:

• AnalysisReport: Detailed analysis results with issues and suggestions

scan

Scans a directory for code files to analyze.

async function scan(
  directory: string,
  options?: ScanOptions
): Promise<string[]>

Parameters:

• directory: Directory to scan
• options: Optional scan configuration (recursive, file patterns, etc.)

Returns:

• Array of file paths found

report

Generates a formatted report from analysis results.

async function report(
  results: AnalysisReport[],
  format: 'text' | 'json' | 'html'
): Promise<string>

Parameters:

• results: Array of analysis reports
• format: Output format (text, json, or html)

Returns:

• Formatted report string

Configuration

The skill can be configured with custom rules and settings:

name: code-analyzer
config:
  severity: warning  # Minimum severity to report (info, warning, error)
  rules:
    no-console: warning
    no-eval: error
    no-var: warning
    max-complexity: 10
    max-lines: 500
  excludePatterns:
    - '**/*.test.ts'
    - '**/*.spec.ts'
    - '**/node_modules/**'

Examples

Analyze a Single File

const result = await analyze('./src/main.ts', 'typescript');
console.log(await report([result], 'text'));

Scan and Analyze Directory

const files = await scan('./src', { recursive: true });
const results = await Promise.all(
  files.map(file => analyze(file, detectLanguage(file)))
);
console.log(await report(results, 'html'));

With Custom Configuration

const config = {
  severity: 'error',
  rules: {
    maxComplexity: 5,
    maxLines: 200,
  },
};

const result = await analyze('./src/main.ts', 'typescript', config);

Supported Languages

• JavaScript (ES5, ES6+)
• TypeScript
• Python 2 and 3
• Java
• Go
• Rust
• C/C++
• Ruby
• PHP

Limitations

• Large files (>1MB) may be slow to analyze
• Some language-specific features may not be detected
• Accuracy depends on code clarity and structure
• Does not execute code, only static analysis

Best Practices

When using this skill:

1. Start Small: Analyze individual files before entire projects
2. Configure Appropriately: Adjust rules for your project's needs
3. Review Results: Not all suggestions may apply to your context
4. Iterative Improvement: Fix critical issues first, then refine
5. Combine with Tests: Use alongside automated testing

Attribution

Original skill from Claude Skills Library.