[
  {
    "snippet_id": "medium_001",
    "filename": "cart.py",
    "code": "def collect_names(items):\n    names = []\n    for i in range(len(items) - 1):\n        names.append(items[i].name)\n    return names",
    "gold_issues": [
      {
        "issue_id": "medium_001_off_by_one",
        "line": 3,
        "issue_type": "LOGIC",
        "severity": "MEDIUM",
        "description": "Loop skips the last item because of an off-by-one range.",
        "required": true,
        "explanation_keywords": ["off-by-one", "last item", "range", "skip", "len"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_002",
    "filename": "lists.py",
    "code": "def add_item(item, bucket=[]):\n    bucket.append(item)\n    return bucket",
    "gold_issues": [
      {
        "issue_id": "medium_002_mutable_default",
        "line": 1,
        "issue_type": "LOGIC",
        "severity": "HIGH",
        "description": "Mutable default argument is shared between calls.",
        "required": true,
        "explanation_keywords": ["mutable", "default", "shared", "calls", "list"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_003",
    "filename": "loader.py",
    "code": "def load_payload(reader):\n    try:\n        return reader.read()\n    except Exception:\n        pass\n    return None",
    "gold_issues": [
      {
        "issue_id": "medium_003_swallow",
        "line": 4,
        "issue_type": "LOGIC",
        "severity": "HIGH",
        "description": "Broad exception is swallowed, hiding errors from callers.",
        "required": true,
        "explanation_keywords": ["exception", "swallow", "pass", "hide", "error"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_004",
    "filename": "billing.py",
    "code": "def total_price(prices):\n    total = 0\n    for price in prices:\n        total = total + str(price)\n    return total",
    "gold_issues": [
      {
        "issue_id": "medium_004_type_bug",
        "line": 4,
        "issue_type": "LOGIC",
        "severity": "MEDIUM",
        "description": "Converts price to string and concatenates instead of adding numerically.",
        "required": true,
        "explanation_keywords": ["string", "concatenate", "numeric", "add", "type"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_005",
    "filename": "flags.py",
    "code": "def should_run(user_input):\n    if user_input == True:\n        return True\n    return False",
    "gold_issues": [
      {
        "issue_id": "medium_005_bool_compare",
        "line": 2,
        "issue_type": "LOGIC",
        "severity": "LOW",
        "description": "Explicit comparison to True is brittle and can mis-handle truthy values.",
        "required": true,
        "explanation_keywords": ["true", "truthy", "boolean", "comparison", "if"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_006",
    "filename": "ranges.py",
    "code": "def between(value, start, end):\n    if value >= start or value <= end:\n        return True\n    return False",
    "gold_issues": [
      {
        "issue_id": "medium_006_boolean_logic",
        "line": 2,
        "issue_type": "LOGIC",
        "severity": "HIGH",
        "description": "Uses `or` instead of `and`, so the range check almost always passes.",
        "required": true,
        "explanation_keywords": ["or", "and", "range", "always", "boolean"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_007",
    "filename": "cleanup.py",
    "code": "def remove_empty(values):\n    for value in values:\n        if not value:\n            values.remove(value)\n    return values",
    "gold_issues": [
      {
        "issue_id": "medium_007_mutation_during_iteration",
        "line": 4,
        "issue_type": "LOGIC",
        "severity": "HIGH",
        "description": "Mutates the list while iterating, causing elements to be skipped.",
        "required": true,
        "explanation_keywords": ["mutate", "iteration", "remove", "skip", "list"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_008",
    "filename": "averages.py",
    "code": "def average(numbers):\n    if not numbers:\n        return 0\n    return sum(numbers) / (len(numbers) - 1)",
    "gold_issues": [
      {
        "issue_id": "medium_008_divisor",
        "line": 4,
        "issue_type": "LOGIC",
        "severity": "HIGH",
        "description": "Divides by len(numbers) - 1, producing the wrong average and crashing for one item.",
        "required": true,
        "explanation_keywords": ["average", "divide", "len", "minus 1", "wrong"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_009",
    "filename": "retry.py",
    "code": "def fetch_name(client):\n    try:\n        return client.name()\n    except ValueError:\n        return \"\"\n    return None",
    "gold_issues": [
      {
        "issue_id": "medium_009_unreachable_fallback",
        "line": 6,
        "issue_type": "LOGIC",
        "severity": "LOW",
        "description": "The final return is unreachable and suggests the error path was designed incorrectly.",
        "required": false,
        "explanation_keywords": ["unreachable", "return", "fallback", "dead code"]
      },
      {
        "issue_id": "medium_009_swallow",
        "line": 5,
        "issue_type": "LOGIC",
        "severity": "MEDIUM",
        "description": "Returns an empty string on ValueError, masking the failure as a valid result.",
        "required": true,
        "explanation_keywords": ["empty string", "mask", "failure", "valid result", "error"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  },
  {
    "snippet_id": "medium_010",
    "filename": "tokens.py",
    "code": "def normalize_token(token):\n    if token is \"\":\n        return None\n    return token.strip()",
    "gold_issues": [
      {
        "issue_id": "medium_010_is_compare",
        "line": 2,
        "issue_type": "LOGIC",
        "severity": "MEDIUM",
        "description": "Uses `is` for string comparison instead of equality.",
        "required": true,
        "explanation_keywords": ["is", "string", "comparison", "equality", "identity"]
      }
    ],
    "must_approve": false,
    "must_reject": true
  }
]