"de buenas" meaning in Spanish

{
  "head_templates": [
    {
      "args": {
        "inv": "yes"
      },
      "expansion": "de buenas (invariable)",
      "name": "es-adj"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "On nights with a full moon\nIt's because the child is in a good mood\nAnd if the child does weep\nThe moon wanes, making a cradle for him",
          "ref": "1986, Mecano, Hijo de la luna",
          "roman": "Menguará la luna para hacerle una cuna",
          "text": "Y las noches que haya luna llena\nSerá porque el niño esté de buenas\nY si el niño llora"
        }
      ],
      "glosses": [
        "in a good mood"
      ],
      "id": "en-de_buenas-es-adj-xnj8dGHQ",
      "links": [
        [
          "good",
          "good"
        ],
        [
          "mood",
          "mood"
        ]
      ],
      "tags": [
        "invariable"
      ]
    }
  ],
  "word": "de buenas"
}

{
  "head_templates": [
    {
      "args": {
        "inv": "yes"
      },
      "expansion": "de buenas (invariable)",
      "name": "es-adj"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Spanish adjectives",
        "Spanish entries with incorrect language header",
        "Spanish indeclinable adjectives",
        "Spanish lemmas",
        "Spanish multiword terms",
        "Spanish terms with quotations"
      ],
      "examples": [
        {
          "english": "On nights with a full moon\nIt's because the child is in a good mood\nAnd if the child does weep\nThe moon wanes, making a cradle for him",
          "ref": "1986, Mecano, Hijo de la luna",
          "roman": "Menguará la luna para hacerle una cuna",
          "text": "Y las noches que haya luna llena\nSerá porque el niño esté de buenas\nY si el niño llora"
        }
      ],
      "glosses": [
        "in a good mood"
      ],
      "links": [
        [
          "good",
          "good"
        ],
        [
          "mood",
          "mood"
        ]
      ],
      "tags": [
        "invariable"
      ]
    }
  ],
  "word": "de buenas"
}