[
  {
    "type": "add_column",
    "description": "Add minShiftLengthHours column to storesAiPrefs for minimum shift length enforcement in AI/math scheduling",
    "database": "{{store}}",
    "check_query": "SHOW COLUMNS FROM storesAiPrefs WHERE Field = 'minShiftLengthHours'",
    "sql": "ALTER TABLE storesAiPrefs ADD COLUMN minShiftLengthHours DECIMAL(4,2) NOT NULL DEFAULT 4.00 COMMENT 'Minimum shift length in hours for AI/math scheduling (default 4)' AFTER lastSolverType"
  }
]