{"id":"age-calculator","engine":"core","category":"date","name":"年齢計算","fields":[{"key":"birth","label":"生年月日","type":"date","default":"1995-06-15","required":true},{"key":"asof","label":"基準日","type":"date","default":"2026-11-11","required":true}],"sample":{"birth":"1995-06-15","asof":"2026-11-11"}}