jsdoc-gen

name	jsdoc-gen
description	Add JSDoc or TSDoc comments to your code. Use when documentation is missing.

JSDoc Generator

Your exported functions have no documentation. This tool adds JSDoc or TSDoc comments to all your exports without touching the actual code logic.

One command. Zero config. Just works.

Quick Start

npx ai-docs src/ --style jsdoc

What It Does

• Adds JSDoc/TSDoc comments to exported functions and classes
• Describes parameters, return values, and exceptions
• Preserves all existing code and comments
• Works on files, directories, or glob patterns

Usage Examples

# Preview docs for a directory
npx ai-docs src/ --style jsdoc

# TSDoc style
npx ai-docs src/ --style tsdoc

# Write changes to files
npx ai-docs src/ --style jsdoc --write

# Single file
npx ai-docs src/utils.ts --style jsdoc

# Glob patterns
npx ai-docs "src/**/*.ts" --style tsdoc

Best Practices

• Preview first - run without --write to see what changes
• Focus on exports - internal helpers don't need docs
• Add examples - especially for complex functions
• Review output - AI might miss nuances

When to Use This

• Codebase has zero documentation
• Onboarding requires reading every function
• IDE hints are unhelpful without docs
• Preparing for open source release

Part of the LXGIC Dev Toolkit

This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.

Find more:

• GitHub: https://github.com/LXGIC-Studios
• Twitter: https://x.com/lxgicstudios
• Substack: https://lxgicstudios.substack.com
• Website: https://lxgic.dev

Requirements

No install needed. Just run with npx. Node.js 18+ recommended. Needs OPENAI_API_KEY environment variable.

npx ai-docs --help

How It Works

Reads your files, identifies exported functions, classes, and types, then generates appropriate documentation comments. The AI understands the function signatures and infers what each parameter does.

License

MIT. Free forever. Use it however you want.