ast-grep/ast-grep

Health v2 · maintenance only

Adoption not part of the score

15652 stars · 437 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

ast-grep is a fast Rust-based CLI tool for structural search, linting, and rewriting of code using AST patterns instead of plain text matching. It supports 20+ languages via tree-sitter, offers interactive codemods, custom lint rules, and a Node.js API for programmatic use.

Use cases

• find all calls to a function across a codebase by syntax pattern
• rewrite deprecated API calls to new ones at scale
• write custom lint rules using AST patterns
• run interactive codemods over thousands of files
• search code structurally instead of with regex
• enforce code patterns in CI as a linter

When to choose

• you need syntax-aware search or replace across many languages
• regex grep is too imprecise for code refactoring
• you want custom lint rules without writing a full linter plugin
• you need fast, parallel large-scale codemods

When to avoid

• you only need simple text search where regex suffices
• your language has no tree-sitter grammar and you cannot write one
• you need full compiler-grade semantic analysis like type-aware refactoring

Facets

cli-tool · maturity active

search-engine linter parser developer-tools cli developer-tools parsers version-control windows cli rust python ast tree-sitter structural-search codemod code-rewriting static-analysis refactoring command-line linux macos nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="ast-grep/ast-grep")