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moai-tool-ast-grep

Perform AST-based structural code search, refactoring, and security scanning across 40+ languages.

Updated Feb 2, 2026
Search Tags:#security#refactoring#lint#codemod#ast#code-search#structural-search
One-click install
npx skills add https://github.com/CJ-1981/excel-processor --skill moai-tool-ast-grep-cj-1981
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: moai-tool-ast-grep
Source: https://github.com/CJ-1981/excel-processor/tree/main/.claude/skills/moai-tool-ast-grep
Command: npx skills add https://github.com/CJ-1981/excel-processor --skill moai-tool-ast-grep-cj-1981

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides advanced, syntax-aware code analysis for searching complex patterns, performing semantic refactoring, and identifying security vulnerabilities across a wide range of programming languages.

Core Features & Use Cases

  • Structural Code Search: Find code patterns that regex cannot capture, like nested function calls or specific AST structures.
  • AST-based Refactoring: Perform safe and semantic code transformations, API migrations, and codemod operations.
  • Security Scanning: Detect common vulnerabilities like SQL injection, XSS, and hardcoded secrets based on code structure.
  • Use Case: Automatically refactor all instances of a deprecated API call across your entire codebase, or scan for specific security anti-patterns before committing code.

Quick Start

Use the moai-tool-ast-grep skill to find all instances of console.log in JavaScript files within the src directory.

Frequently Asked Questions about moai-tool-ast-grep

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I perform structural code search across multiple programming languages?▼

Structural code search is performed using AST-based pattern matching to find syntax-aware structures like nested function calls across 40+ programming languages, returning precise code locations that regex cannot capture.

What is the best way to automate API migrations and codemod operations safely?▼

AST-based refactoring automates API migrations and codemod operations by applying syntax-aware code transformations, ensuring semantic accuracy when updating deprecated API calls across an entire codebase.

Can I scan for security vulnerabilities like SQL injection based on code structure?▼

Security scanning detects common vulnerabilities like SQL injection, XSS, and hardcoded secrets by analyzing the AST structure rather than string matching, identifying risky code patterns before committing code.

Does ast-grep work for finding specific syntax patterns in large codebases?▼

ast-grep works across large codebases by parsing files into abstract syntax trees to locate specific AST structures, enabling syntax-aware code search that handles complex nested logic across 40+ languages.

Why use AST-based structural search instead of regex for code refactoring?▼

AST-based structural search understands code syntax and semantic context, allowing it to accurately match nested function calls and specific code structures where regex pattern matching fails or produces false positives.

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