https://www.ostara.work/ 2026-05-16T14:00:00+02:00 weekly 1.0 https://www.ostara.work/ostara-3339 2026-05-16T14:00:00+02:00 monthly 1.0 https://www.ostara.work/ostara-3339/core 2026-05-16T14:00:00+02:00 monthly 0.9 https://www.ostara.work/ostara-3339/json-schema 2026-05-15T19:00:00+02:00 monthly 0.9