Can I use this skill to automatically modify my code?

Yes, by defining 'fix' rules in YAML or using the refactoring workflow, the skill can systematically update code patterns across your entire project safely.

What are metavariables in ast-grep?

Metavariables (like $VAR) allow you to capture specific nodes in a code pattern—such as variable names, arguments, or function bodies—and reuse them in search results or refactoring templates.

Which programming languages does this skill support?

It supports a wide range of languages including JavaScript, TypeScript, Python, and Go, and includes specialized support for Nextflow pipeline patterns.

How does ast-grep differ from standard grep?

Unlike standard grep which uses text-based regex, ast-grep understands code structure (AST), allowing you to search for functional patterns regardless of formatting, comments, or whitespace.

AST-Grep Structural Search & Refactor

Name: AST-Grep Structural Search & Refactor
Author: edmundmiller

byedmundmiller

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개발자 도구

Performs structural code searching and systematic refactoring using Abstract Syntax Tree (AST) patterns across multiple programming languages.

소개

The ast-grep skill empowers Claude to perform intelligent code analysis and modification by understanding the underlying structure of the source code rather than relying on brittle text-based searches. By leveraging AST patterns and metavariables, it allows developers to find complex code constructs, identify anti-patterns, and execute systematic refactorings with high precision. This skill is particularly valuable for large-scale codebase migrations, linting domain-specific logic in frameworks like Nextflow, and enforcing architectural standards through custom YAML rules that go beyond standard regex capabilities.

주요 기능

Automated code refactoring with rule-based 'fix' and 'update-all' capabilities
Relational rules to search within specific contexts like 'inside' or 'has'
40 GitHub stars
Structural pattern matching using AST nodes instead of simple text or regex
Multi-language support including JavaScript, Python, TypeScript, and Nextflow
Metavariables for capturing and transforming specific code fragments

사용 사례

Migrating deprecated API calls or function signatures across a large repository
Identifying and fixing anti-patterns in complex Nextflow workflow definitions
Automating the addition of error handling to unhandled asynchronous functions

소개

주요 기능

Automated code refactoring with rule-based 'fix' and 'update-all' capabilities
Relational rules to search within specific contexts like 'inside' or 'has'
40 GitHub stars
Structural pattern matching using AST nodes instead of simple text or regex
Multi-language support including JavaScript, Python, TypeScript, and Nextflow
Metavariables for capturing and transforming specific code fragments

사용 사례

Migrating deprecated API calls or function signatures across a large repository
Identifying and fixing anti-patterns in complex Nextflow workflow definitions
Automating the addition of error handling to unhandled asynchronous functions