{"id":"date-difference","engine":"core","category":"date","name":"日付の差を計算","fields":[{"key":"start","label":"開始値","type":"date","default":"2026-01-01","required":true},{"key":"end","label":"終了値","type":"date","default":"2026-11-11","required":true},{"key":"inclusive","label":"両端を含む (pt)","type":"checkbox","default":false}],"sample":{"start":"2026-01-01","end":"2026-11-11","inclusive":false}}