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_template/STRUCTURE.md

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+# Recommended Deck Layout
+
+This file shows two practical folder layouts that match the example manifests in this template folder.
+
+## Option 1: Template-Driven Layout
+
+Use with `deck.json`.
+
+```text
+My Custom Deck/
+  deck.json
+  majors/
+    00.png
+    01.png
+    02.png
+    ...
+    21.png
+  minors/
+    wands-01.png
+    wands-02.png
+    ...
+    wands-14.png
+    cups-01.png
+    ...
+    swords-14.png
+    disks-14.png
+```
+
+How it resolves:
+- Majors use `majors/{number}.png` with `numberPad: 2`
+- Minors use `minors/{suit}{index}.png`
+- `suitPrefix.wands = "wands-"` means `Ace of Wands -> minors/wands-01.png`
+
+## Option 2: Explicit Major Map + Sequential Minors
+
+Use with `deck.canonical-map.example.json` after renaming it to `deck.json`.
+
+```text
+My Mapped Deck/
+  deck.json
+  majors/
+    fool.webp
+    magician.webp
+    high-priestess.webp
+    ...
+    world.webp
+  minors/
+    01.webp
+    02.webp
+    03.webp
+    ...
+    56.webp
+```
+
+How it resolves:
+- Each major is explicitly mapped in `majors.cards`
+- Minors use `minors/{number}.webp`
+- `suitBase` controls where each suit starts in the numbered run
+
+## Practical Notes
+
+- Keep file extensions and case consistent with your manifest.
+- If your deck uses renamed trumps such as `Aeon` or `Universe`, keep the image names aligned with either `nameOverrides` or explicit `cards` mappings.
+- If your minors have titled names such as `Six of Cups -> Pleasure`, define those in `minorNameOverrides`.
+- `validate:decks` checks manifest shape, required card coverage, supported modes, and referenced image files.