Foundry VTT Module Development

Build, extend, and maintain modules for Foundry Virtual Tabletop (v13+). This skill covers the full module lifecycle — from scaffolding a new module to migrating between Foundry versions.

Quick Start

Module Structure

my-module/
├── module.json          ← manifest (required)
├── scripts/
│   └── main.mjs         ← ES module entry point
├── templates/            ← Handlebars HTML templates
├── styles/               ← CSS stylesheets
├── packs/                ← compendium data
└── lang/
    └── en.json           ← localization strings