Which languages does this skill support?

It supports over 20 languages including Java, JavaScript, TypeScript, Python, Rust, Go, C++, C#, and more.

Can I use this for automated code migrations?

Yes, it excels at structural rewrites and pattern-based transformations, making it ideal for bulk refactoring and API migrations.

How is ast-grep different from standard grep?

Unlike text-based grep, ast-grep understands the syntactic structure of code (AST), preventing false positives from comments or strings and allowing for more precise matching.

What are meta-variables in ast-grep?

Meta-variables (like $VAR) are placeholders that capture AST nodes, allowing you to match variable content and reuse it in search patterns or rewrite results.

Does it support custom linting rules?

Yes, you can define custom rules in YAML format to enforce specific patterns, security standards, or best practices within your project.

ast-grep Code Analysis

Name: ast-grep Code Analysis
Author: towry

bytowry

•

Developer Tools

Performs high-precision, AST-based code searching, linting, and structural refactoring across 20+ programming languages.

Leverages Abstract Syntax Trees (AST) to enable structurally aware code manipulation that avoids the pitfalls of text-based search and regex. This skill allows Claude to understand code patterns, apply surgical rewrites, and enforce project-specific linting rules by treating code as a tree structure rather than plain text. It is particularly effective for complex refactoring tasks, security audits, and navigating large-scale codebases in languages like Java, Python, and TypeScript.

Key Features

01Structural searching using AST nodes to avoid false positives in comments or strings

02Custom linting rule creation using YAML configuration for domain-specific standards

03Language-specific pattern matching for complex structures like Java annotations and streams

04Multi-language support for 20+ languages including Java, Rust, Go, and Python

05Automated code rewrites and codemods with flexible meta-variable support

0611 GitHub stars

Use Cases

01Identifying security vulnerabilities such as SQL injection or hardcoded credentials

02Executing large-scale API migrations and structural code refactoring

03Enforcing domain-specific coding standards and architectural patterns via custom rules

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add towry/dots ast-grep

For use in Claude.ai and ChatGPT

Download Skill