How to Build Foundry VTT Modules in 2026 | EP 2: module.json

Every Foundry VTT module starts with one file: module.json. In this episode we go through the manifest field by field, build out the manifest for our Session Tracker module, and cover the handful of mistakes that make Foundry ignore your module completely. Next episode: hooks and Foundry's event loop. We finally start writing code. Join the Discord:   / discord   Support the channel on Ko-fi: https://ko-fi.com/bigblobgames Course playlist:    • Foundry VTT Module Making (v14)   Chapters: 00:00 Intro 01:00 What the manifest does 01:57 Identity fields: id, title, description 02:46 version and semantic versioning 03:56 authors 05:13 compatibility: minimum, verified, maximum 06:45 esmodules: your code's front door 07:45 styles 08:28 languages and en.json 09:43 Folder checkpoint 10:03 Fields we're skipping: packs, relationships, socket 11:27 Distribution fields 12:37 Why your module isn't loading 14:14 Wrap up and next episode: hooks #foundry #FoundryVTT #TTRPG #JavaScript