---
title: "ast-grep Structural Code Search and Rewrite"
description: "Use ast-grep (sg) to search, lint, and rewrite code across large codebases using AST pattern matching. A blazing-fast alternative to regex-based code transformations that understands syntax structure."
verification: "security_reviewed"
source: "https://github.com/ast-grep/ast-grep"
category:
  - "Code Quality & Review"
framework:
  - "Claude Code"
tool_ecosystem:
  github_repo: "ast-grep/ast-grep"
  github_stars: 13245
---

# ast-grep Structural Code Search and Rewrite

Use ast-grep (sg) to search, lint, and rewrite code across large codebases using AST pattern matching. A blazing-fast alternative to regex-based code transformations that understands syntax structure.

## Installation

Choose whichever fits your setup:

1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/ast-grep-structural-code-search-rewrite/)