ast-grep

• ast-grep | structural search/rewrite tool for many languages
  • #via Person/Peter Steinberger
    • Peter Steinberger on X: "Adding ast-grep has been a huge win for my codebase. Keeps agents from boundary violations and writing crappy code. https://t.co/xBVzLptl8b Supports pretty much all languages! Some examples: - Add AST-grep rules to flag .insertInto('profiles') outside lib/db/** to prevent" / X
      • I don't totally understand Peter's examples, but it sounds generally useful to provide validators to LLMs

        • Some #Examples
          

          • Add AST-grep rules to flag .insertInto('profiles') outside lib/db/** to prevent drift.
            

          • Codec boundaries (no new Date / toISOString outside validators)
            

          • JSONB hygiene (Disallow JSON.stringify(...) in .set)
            

  • My Notes I wonder how this compares with
    • Py/Lib/LibCST, GritQL