ast-grep-transforms

What problem does it solve?

This skill automates rewriting and transforming code with ast-grep rules, reducing manual refactors and enabling precise metavariable-driven edits.

Core Features & Use Cases

• Automate code rewriting with patterns and metavariable substitution to produce deterministic fixes.
• Apply transform operations (replace, substring, convert, rewrite) to manipulate captured text before substitution.
• Chain rewriters for recursive or selective transformations and reuse FixConfig for advanced behavior (expandStart, expandEnd).
• Use codemods to perform large-scale refactors across languages supported by ast-grep.

Quick Start

Create a simple rule to rename a JavaScript variable from var to let using metavariables and a fix.