{"id":"date-difference","engine":"core","category":"date","name":"Date difference calculator","fields":[{"key":"start","label":"Start date","type":"date","default":"2026-01-01","required":true},{"key":"end","label":"End date","type":"date","default":"2026-11-11","required":true},{"key":"inclusive","label":"Include both endpoints","type":"checkbox","default":false}],"sample":{"start":"2026-01-01","end":"2026-11-11","inclusive":false}}