How does this differ from the standard Grep tool?

While the Grep tool performs simple text-based searches, AST-Grep understands the underlying syntax of the code. This prevents false positives by distinguishing between actual code logic and text found in comments or strings.

Which programming languages are supported?

It supports over 40 languages including Python, JavaScript, TypeScript, Go, Rust, Java, C++, Ruby, Swift, and many more.

Can I use this for automated refactoring?

Yes, it is designed for structural transformations. You can define search patterns and rewrite rules to safely update code across hundreds of files simultaneously.

Is it useful for security audits?

Absolutely. It includes capabilities for scanning for vulnerability patterns like SQL injection or XSS by analyzing how data flows through specific AST nodes.

AST-Grep Structural Analysis

Name: AST-Grep Structural Analysis
Author: modu-ai

bymodu-ai

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770

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Security & Testing

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

The AST-Grep Structural Analysis skill empowers Claude Code to move beyond simple text-based searching by leveraging Abstract Syntax Trees (AST) for precise code manipulation. Part of the MoAI Agentic Development Kit, it allows for syntax-aware pattern matching that understands code structure, making it ideal for complex refactoring, identifying security vulnerabilities like SQL injection, and executing large-scale codemods. By utilizing meta-variables and variadic captures, this tool provides a level of accuracy and speed in codebase exploration that traditional regex-based tools cannot match.

Key Features

01Syntax-aware structural search using pattern matching

02770 GitHub stars

03Automated code transformation and large-scale refactoring

04Advanced meta-variable capture for complex code blocks

05Comprehensive security scanning for 40+ programming languages

06Native integration with the MoAI Explore agent for deep analysis

Use Cases

01Scanning for complex security patterns that evade traditional regex lints

02Executing codebase-wide API migrations by rewriting function signatures

03Automating the deprecation of legacy code patterns across microservices

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add modu-ai/moai-adk moai-tool-ast-grep

For use in Claude.ai and ChatGPT

Download Skill