{
  "missions": [
    {
      "id": "msn_test_001",
      "title": "Test Mission 1",
      "description": "A test mission for unit testing purposes",
      "type": "CONCEPT",
      "yearGroup": 3,
      "chapter": 1,
      "order": 1,
      "difficulty": "beginner",
      "estimatedMinutes": 20,
      "xpReward": 100,
      "starReward": 3,
      "tags": ["test", "concept"],
      "worldId": "world_y3",
      "worldName": "Syntax World",
      "prerequisites": [],
      "objectives": [
        { "id": "obj_test_001", "description": "Complete the test", "type": "complete", "completed": false }
      ],
      "hints": ["Hint 1", "Hint 2", "Hint 3"],
      "canonLocked": false
    }
  ],
  "worlds": [
    {
      "id": "world_y3",
      "name": "Syntax World",
      "emoji": "🌍",
      "yearGroup": 3,
      "theme": "Sequences & Patterns",
      "color": "#10B981",
      "description": "Test world for unit testing",
      "totalMissions": 24,
      "completedMissions": 0,
      "completionPercent": 0,
      "isUnlocked": true
    }
  ]
}