Mirror case definitions at the repo root

cases.json is data (bilingual case definitions, maintainer-owned), so it
moves alongside models/ and outputs/; the site build will consume it
from here.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

cases.json

@@ -0,0 +1,32 @@
+[
+  {
+    "id": "mythos-craft",
+    "index": "01",
+    "kind": "html",
+    "title": { "zh": "神话境界", "en": "Mythos Craft" },
+    "tagline": {
+      "zh": "单个 HTML 文件，一次生成一款《我的世界》式的可玩 3D 体素世界。",
+      "en": "A playable Minecraft-style 3D voxel world, generated as a single HTML file in one shot."
+    },
+    "prompt": {
+      "zh": "你是一个顶级的资深游戏开发者。请为我使用单 HTML5 和 Canvas（或 Three.js）编写一个《我的世界》克隆版。请包含以下核心功能：\n\n1. 一个基于柏林噪声（Perlin Noise）生成的无限或可滚动的 3D 地形。\n2. 第一人称视角，支持使用 WASD 移动和鼠标环视。\n3. 支持至少 3 种方块类型（如：泥土、草地、石头等），并支持鼠标左键破坏方块，右键放置方块。材质要尽可能还原。\n4. 要有一个内置的、极其丰富的神话幻想中的建筑和地形等，由你自行设计。",
+      "en": "You are a top-tier veteran game developer. Build me a Minecraft clone using a single HTML5 file and Canvas (or Three.js). Include the following core features:\n\n1. An infinite or scrollable 3D terrain generated from Perlin noise.\n2. A first-person view with WASD movement and mouse look.\n3. At least 3 block types (e.g. dirt, grass, stone), with left-click to break and right-click to place blocks. Keep the textures as faithful as possible.\n4. A built-in, extremely rich set of mythic-fantasy buildings and terrain, designed at your own discretion."
+    },
+    "tags": ["HTML", "3D", "GAME", "ONE-SHOT"]
+  },
+  {
+    "id": "pelican-cycling",
+    "index": "02",
+    "kind": "svg",
+    "title": { "zh": "鹈鹕海边骑行", "en": "Pelican by the Sea" },
+    "tagline": {
+      "zh": "经典 SVG 测评题：让模型用代码「画」出一只骑自行车的鹈鹕。",
+      "en": "The classic SVG eval: make the model \"draw\" a pelican riding a bicycle, in code."
+    },
+    "prompt": {
+      "zh": "制作一个逼真的、生动的、在海边骑着自行车的鹈鹕 <svg>",
+      "en": "Create a realistic, lively <svg> of a pelican riding a bicycle by the sea."
+    },
+    "tags": ["SVG", "ILLUSTRATION", "ONE-SHOT"]
+  }
+]