3d6
A small native Mac app for Old-School Essentials characters. The sheet fills
in what the rules decide (saves, attacks, AC, movement, level-ups) and keeps
every character in a plain Markdown file with a YAML header.
Website: soggybag.github.io/Character-Sheets
Try the beta
The app is in open beta on TestFlight:
Join the beta
- You need macOS 15 or later and Apple's TestFlight app (the link offers it).
- Requires Old-School Essentials. The app knows the Classic Fantasy
classes' numbers; the rules themselves are in the books.
- It's a beta: keep copies of characters you care about. Each one is a
plain text file, so a backup is just a copy of the file.
- Send feedback from Help → Send Feedback… in the app, with TestFlight's
screenshot feedback, or by opening an issue here.
3d6 is an independent app. It isn't an official Old-School
Essentials product, and isn't affiliated with or approved by Necrotic Gnome.
Old-School Essentials is a trademark of Necrotic Gnome. The trademark and
Old-School Essentials logo are used with permission of Necrotic Gnome, under
license.
Docs
Layout
| Path | What |
|---|
App/ | The macOS app (SwiftUI, document-based). Files added here are picked up by Xcode automatically. |
Config/ | Info.plist (document types) and entitlements |
Packages/CharacterKit/ | Reading and writing character files. No UI; shared with a future iPad app. |
Packages/CharacterKit/Sources/CharacterKit/Resources/ose/ | OSE Classic rules data (JSON), bundled with the app |
schema/ | JSON Schema for the file header |
examples/ | Example characters. Also test fixtures: every file must round-trip byte for byte. |
Build and test
Requires Xcode 16 or later. The app runs on macOS 15+.
# App
open "Character Sheets.xcodeproj" # then Run (⌘R)
# CharacterKit tests (or choose the CharacterKit scheme in Xcode and press ⌘U)
cd Packages/CharacterKit && swift test
The Xcode project and scheme are still named Character Sheets; the app builds
as 3d6.app. The bundle id is com.mitchellhudson.CharacterSheets, signed
automatically with team 753UQ7TNXJ. To send a build to TestFlight, run
scripts/testflight.sh (see docs/RELEASING.md).
Third-party notices (Yams, MIT; OSE SRD rules data, OGL 1.0a; the
Old-School Essentials third-party license) are in App/Help/Legal.swift,
shown in About and Help → Licenses and Legal. The full OGL text ships in the
CharacterKit resource bundle.
