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ast-grep

ast-grep/agent-skill

AST-based code search and transform. Like grep but it understands your code structure — find patterns, refactor safely, and lint with structural matching. A daily driver for anyone who touches code.

Guide for writing ast-grep rules to perform structural code search and analysis. Use when users need to search codebases using Abstract Syntax Tree (AST) patterns, find specific code structures, or perform complex code queries that go beyond simple text search. This skill should be used when users ask to search for code patterns, find specific language constructs, or locate code with particular structural characteristics.