Pi permission extension — four permission modes (yolo/auto/approve/strict) with three-layer pipeline (AST + rules + AI classifier).

AST utility module for statically analyzing JSX

Multi-mode static analysis framework for LLM agents — regex + AST rules over bundled language grammars (C#, TypeScript, Rust, Go)

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

MermaidJS parser

Utilities for ESLint plugins.

Esprima-compatible implementation of the Mozilla JS Parser API

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

AST-aware v8-to-istanbul

AST utils for webassemblyjs

Oxc Parser Node API

A class library that provides an API similar to ESLint's token store

A toolkit for easy Babel AST generation and manipulation.

A modern CSS parser and stringifier with TypeScript support

Generate regular expressions from regjsparser’s AST.

A library for analysing JS RegExp

Flow types for the Javascript AST

Transform HAST to Babel AST (JSX)

An AST-based pattern checker for JavaScript.

lightweight JavaScript APG parser