ast-grep

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Read-only structural code search with ast-grep/sg. Grep/rg/sed alternative for AST-aware CLI exploration, pattern search, and fast code discovery. Activates on ast-grep/sg, structural search, AST search, find usages, tree-sitter.

anntnzrb By anntnzrb schedule Updated 6/2/2026
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name: ast-grep description: Read-only structural code search with ast-grep/sg. Grep/rg/sed alternative for AST-aware CLI exploration, pattern search, and fast code discovery. Activates on ast-grep/sg, structural search, AST search, find usages, tree-sitter. license: GPL-3.0-or-later metadata: author: anntnzrb allowed-tools: ""

ast-grep

Overview

Read-only CLI search with sg or ast-grep. AST-aware grep for code exploration and SWE tasks.

Quick start

  • Prefer sg. Fallback ast-grep run. Last resort: nix run nixpkgs#ast-grep -- run
  • Example: sg -p 'console.log($MSG)' -l ts src
  • Files only: sg -p 'console.log($$$)' -l ts --files-with-matches src

Guardrails

  • Read-only: never use --rewrite, -r, --update-all, or --interactive
  • Stdin requires --lang

Resources

  • reference.md: flags, strictness, selectors, output formats
  • cookbook/: troubleshooting and recipes
Install via CLI
npx skills add https://github.com/anntnzrb/agents --skill ast-grep
Repository Details
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