apps/api/src/routes/events.ts

@@ -198,8 +198,13 @@ eventsRouter.get('/', zValidator('query', eventsQuerySchema), async (c) => {
               sql`${calendarEvents.dtstartUtc} >= ${windowStartDate}`,
               sql`${calendarEvents.dtstartUtc} < ${windowEndDate}`,
             ),
-            // All-day events: dtstartDate falls in [start, end) — DATE comparison, no time component
+            // Non-recurring all-day events: dtstartDate falls in [start, end) — DATE comparison.
+            // WR-01: gate on hasRrule = 0 so a recurring all-day master whose dtstartDate
+            // lands in the window is NOT also matched here (it is already carried by the
+            // recurring branch above). Without this gate the master is expanded twice and
+            // every occurrence is duplicated on the wire.
             and(
+              sql`${calendarEvents.hasRrule} = 0`,
               sql`${calendarEvents.dtstartDate} IS NOT NULL`,
               sql`${calendarEvents.dtstartDate} >= ${start}`,
               sql`${calendarEvents.dtstartDate} < ${end}`,