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astanalysis

AST-based code querying for JS/TS. USE WHEN find code patterns OR get function calls OR list event l

by vitorfhc|Open Source

AstAnalysis

A Claude Code skill for querying JavaScript/TypeScript code using AST parsing. Instead of regex-based searching, this skill dynamically generates and runs custom Babel-based parsers for any code pattern you describe.

Installation

  1. Clone this repository into your Claude Code skills directory:

    git clone https://github.com/vitorfhc/AstAnalysis.git ~/.claude/skills/AstAnalysis

  2. Install dependencies:

    cd ~/.claude/skills/AstAnalysis/Tools
bun install

  3. The skill will be automatically available in Claude Code.

How It Works

  1. Clarify: AI asks what exactly you're looking for (you can skip this)
  2. Generate: AI creates custom TypeScript AST traversal code for your query
  3. Execute: Runs the generated parser against your target files
  4. Report: Returns matches in file:line - code format

The AI generates fresh parsing code for each request, so you can query for any pattern - not limited to predefined queries.

Usage Examples

Find postMessage listeners:

/ast-analysis find all postMessage listeners in src/

Get function calls:

/ast-analysis list all fetch() calls in ./api

Extract sensitive values:

/ast-analysis find strings starting with 'sk-' in config/

Find React hooks:

/ast-analysis find all useState calls in components/

Locate event handlers:

/ast-analysis get onClick handlers in src/

Requirements

  • Bun runtime
  • Claude Code CLI

Dependencies

  • @babel/parser - JavaScript/TypeScript parsing
  • @babel/traverse - AST traversal
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