Mythic Toolkit

A digital dice tray for the Mythic Game Master Emulator family of solo tabletop-RPG tools. It runs in the browser, works fully offline, and needs no install and no build step.

Open the app

Use one of these:

• Single file. Download mythic-toolkit.html from the latest GitHub Release. Open it from disk. It holds the whole app.
• From the repository. Clone the repository. Open index.html in the browser. It works over file://, with no server.
• Online. The Deploy static content to Pages workflow (.github/workflows/static.yml) publishes the repository to GitHub Pages on every push to main.

Tools

Each tool is a tab. The Mythic GME tab opens first.

Tab	What it does
Mythic GME	Full Mythic GME 2e: Fate Questions, Chaos Factor, the Expected Scene test, Threads and Characters Lists, Thread Progress Tracks, and an editable Random Event Focus Table.
Published Adventures	"Deconstruct The Known" (Mythic Magazine #50): play a published adventure with an Adventure Die, Crisis Scenes, and an Adventure Meaning List. It shares the Chaos Factor, Scene, and Lists with the Mythic GME tab.
3-Act Story	The Mythic 3-Act Story Structure worksheet (Mythic Magazine #42): Story Beats and Act Events across three Acts, then Resolution and Closing Scenes.
Node Narratives	"Node Based Narratives" (Mythic Magazine #71): a Node Sheet of Scene, Event, Thread and Character Nodes and their Connections replaces the Lists. Altered Scenes, Interrupt Scenes and Random Events move along the Connections to an Influence Node. It shares the Chaos Factor, Scene, and Expected Scene with the Mythic GME tab.
Game Master	One-Page Mythic: Ask the GM, Discover Meaning, Random Events, and an optional weighted Random Inspiration Source list.
Adventure Crafter	Themes and Plot Points.
Location Crafter	Regions, Areas, and Progress Points.
Creature Crafter	Creature descriptors, abilities, and behavior.
Character Crafter	NPC descriptors, stats, and behavior.
Mystery Matrix	Clues and Suspects, connections, and the Clincher.
Player Emulator	A solo player emulator from Cloud Empress: Solo Protocol: PC Response Charts, NPC moods, and an encounter mood verdict.
Triple-O	Triple-O: The Player Character Emulator by Cezar Capacle: play from the GM's seat. Trait Sheets for each character, the Triple-O Check (Obvious / Option / Odd) for Actions, Questions, Group Actions and Checks, Double-Down, and the 14 d66 spark and specific tables.

Two panels are always below the active tab:

• Quick Note — a Markdown editor. Press Enter to add the note to the log. Press Shift+Enter for a new line.
• Campaign Log — every roll and note, in order. Copy Markdown and Download .md give the log as Markdown.

Right-click a tab to show it in a second pane on the right (split view). ⚙ Settings has the theme. The default theme, Mythic GME, follows the look of the Mythic GME 2e book. Case file, Fantasy, Sci-fi and Horror are dark themes. Click ? in the header for the help overview.

Campaigns and saving

The Campaign dropdown in the header switches between campaigns. Each campaign has its own tab state and its own log.

The app saves to the browser's sessionStorage. Your data clears when you close the browser tab. To keep campaigns, do one of these:

• Click Export to save a campaign as a JSON file. Click Import to load it again.
• Turn on Dropbox sync (see below).

Dropbox sync (optional)

Dropbox sync keeps every campaign in one JSON file in your Dropbox, in Apps/<app name>/Mythic Toolkit campaigns.json. It is off by default. The app sends nothing to the network until you click Connect.

1. In the Dropbox App Console, click Create app. Choose Scoped access and App folder.
2. On the Permissions tab, tick files.content.write and files.content.read. Click Submit.
3. On the Settings tab, keep Allow public clients (Implicit Grant & PKCE) on Allow. You do not need a redirect URI.
4. In the Mythic Toolkit, click ☁ Dropbox. Open Setup: Dropbox app key and paste the app key.
5. Click Connect. Allow access in the Dropbox tab that opens.
6. Copy the code that Dropbox shows. Paste it into the panel.

After that, the app uploads a few seconds after each change. It checks Dropbox when the tab opens or comes back to the foreground. If this tab and Dropbox both changed, the app merges them campaign by campaign. It asks only about a campaign that changed on both sides, and it can keep both copies.

The app key is not a secret. Do not put the app secret anywhere in the app.

Run the tests

The test suite in tests/ drives the real app in a headless Edge or Chrome. It needs Node and no npm packages.

node tests/run.mjs

Exit code 0 means all tests passed. You can also open tests/tests.html in a browser. See tests/README.md for the layout and coverage.

Build the single file

scripts/build-singlefile.mjs puts every stylesheet and script from index.html into one file, dist/mythic-toolkit.html.

node scripts/build-singlefile.mjs

The release.yml workflow (.github/workflows/release.yml) runs this script on every push to main. It publishes the file as a GitHub Release, tagged v1, v2, and so on.

Project layout

Path	Contents
index.html	The page shell and the ordered list of scripts.
css/	app.css (design tokens and components) and the EasyMDE vendor CSS.
js/app/	The app: one classic script per area, loaded in NN- order.
js/vendor/	marked.js, DOMPurify, and EasyMDE, saved locally for offline use.
tests/	The browser test suite.
scripts/	The single-file build script.
LICENSE, NOTICE.md	The CC BY-NC 4.0 license and the attribution.

To change the code, read AGENTS.md first. It explains the render/wire pattern for each tab, the state model, the import sanitizer, and the mistakes to avoid.

License and credits

This is an unofficial fan tool. It is not made or endorsed by Word Mill Games. It is free and non-commercial. It does not include the rule books.

The project is licensed under CC BY-NC 4.0 (see LICENSE). The vendor libraries keep their own licenses.

This work is based on Mythic Game Master Emulator Second Edition, One-Page Mythic Game Master Emulator, The Adventure Crafter, The Location Crafter, The Creature Crafter, and Mythic Magazine, by Tana Pigeon, published by Word Mill Games under CC BY-NC 4.0. The Player Emulator adapts tables from Cloud Empress: Solo Protocol.

NOTICE.md has the full attribution, the list of changes, and the vendor library licenses.