[
  {
    "task_id": "hard_1",
    "difficulty": "hard",
    "chat_history": [
      "I understand concepts but fail in exams",
      "I run out of time solving numericals"
    ],
    "constraints": {
      "exam_in_days": 5,
      "time_per_day": "2 hours"
    },
    "expected": {
      "issues": ["time management", "numericals"],
      "must_include": ["time", "mock"],
      "plan_features": [
        "timed practice",
        "prioritization",
        "mock tests"
      ]
    }
  },
  {
    "task_id": "hard_2",
    "difficulty": "hard",
    "chat_history": [
      "I study everything but don’t improve",
      "I don’t know what to focus on"
    ],
    "constraints": {
      "exam_in_days": 7,
      "time_per_day": "3 hours"
    },
    "expected": {
      "issues": ["lack of focus", "inefficient study"],
      "must_include": ["focus", "priorit"],
      "plan_features": [
        "topic prioritization",
        "revision cycles",
        "practice questions"
      ]
    }
  },
  {
    "task_id": "hard_3",
    "difficulty": "hard",
    "chat_history": [
      "I get stuck on difficult questions",
      "I waste too much time on one problem"
    ],
    "constraints": {
      "exam_in_days": 3,
      "time_per_day": "2 hours"
    },
    "expected": {
      "issues": ["time waste", "problem selection"],
      "must_include": ["time", "skip"],
      "plan_features": [
        "time limits",
        "skip strategy",
        "mixed practice"
      ]
    }
  }
]