Which programming languages are supported?

It supports over 40 languages, including Python, TypeScript, JavaScript, Java, Rust, Go, C++, Ruby, Swift, and web-specific formats like HTML, Vue, and Svelte.

Can I use this for security audits?

Yes, the skill includes structural scanning capabilities to detect risky patterns like SQL injection, XSS, and insecure API usage using customizable YAML rule sets.

Does it support automated code changes?

Absolutely. It can perform structural rewrites and codemods, allowing you to rename functions, update API signatures, or transform logic safely across your entire project.

How is AST-Grep different from standard Grep?

Unlike standard Grep which uses line-by-line regex, AST-Grep understands the actual code structure (syntax trees), allowing it to match nested patterns, ignore comments/strings, and identify variables accurately.

Is it faster than regular text search for exploration?

For structural queries, yes. It provides a 50-80% reduction in irrelevant results compared to regex, making codebase analysis much faster and more precise.

AST-Grep Structural Code Tool

Name: AST-Grep Structural Code Tool
Author: seo-jinseok

byseo-jinseok

0•

개발자 도구

Performs advanced structural code search, AST-based refactoring, and security scanning across over 40 programming languages.

This skill integrates AST-Grep (sg) into Claude Code, enabling powerful syntax-aware code manipulation that goes beyond simple regex-based searching. It allows developers to find complex code patterns—such as nested function calls or specific class hierarchies—perform large-scale refactoring with semantic awareness, and run security scans for vulnerabilities like SQL injection. By understanding the Abstract Syntax Tree (AST), it minimizes false positives and provides precise transformations, making it an essential tool for deep codebase exploration, API migrations, and enforcing architectural standards.

주요 기능

010 GitHub stars

02Security vulnerability scanning for common patterns like XSS and SQL injection

03Automated code refactoring and codemods with syntax-aware rewrite capabilities

04Structural pattern matching using Abstract Syntax Tree (AST) analysis

05Support for 40+ languages including Python, JavaScript, Rust, and Go

06High-performance codebase exploration with meta-variable capturing

사용 사례

01Migrating deprecated APIs across large-scale polyglot codebases with guaranteed structural accuracy

02Detecting and fixing security vulnerabilities that traditional regex-based tools frequently miss

03Enforcing custom architectural rules or complex code style patterns at the syntax level

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add seo-jinseok/regulation_manager moai-tool-ast-grep

For use in Claude.ai and ChatGPT

Download Skill