diff --git a/prisma/migrations/0047_medication_schedule_window_snake_case/migration.sql b/prisma/migrations/0047_medication_schedule_window_snake_case/migration.sql
new file mode 100644
index 000000000..0dfd81ac6
--- /dev/null
+++ b/prisma/migrations/0047_medication_schedule_window_snake_case/migration.sql
@@ -0,0 +1,24 @@
+-- v1.4.25 W4e — medication_schedules @map to snake_case (cosmetic +
+-- convention).
+--
+-- Prior to this migration `medication_schedules.windowStart` and
+-- `medication_schedules.windowEnd` were the only columns on the model
+-- that still used the camelCase identifier from the original
+-- 0001_init.sql — every other column on the table (medication_id,
+-- days_of_week) already follows the snake_case convention enforced
+-- everywhere else in the schema. The drift was harmless (Prisma's
+-- generated client uses the TypeScript-side `windowStart` /
+-- `windowEnd` names regardless of the SQL identifier), but the
+-- inconsistency tripped reviewers and made `grep window_start
+-- prisma/migrations/` return zero rows.
+--
+-- The rename is purely a rename — the data does not move, no indexes
+-- change, no foreign keys are affected. We use IF EXISTS so a
+-- replayed migration on a fresh-from-schema DB (Prisma's `db push`
+-- against a brand-new local) doesn't blow up trying to rename a
+-- column that the schema-pushed shape already named snake_case.
+--
+-- Forward-only; no DOWN migration.
+
+ALTER TABLE "medication_schedules" RENAME COLUMN "windowStart" TO "window_start";
+ALTER TABLE "medication_schedules" RENAME COLUMN "windowEnd" TO "window_end";
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 1665e010f..4920c0ca2 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -372,8 +372,15 @@ model Medication {
 model MedicationSchedule {
   id           String  @id @default(cuid())
   medicationId String  @map("medication_id")
-  windowStart  String  // HH:mm format, e.g. "08:00"
-  windowEnd    String  // HH:mm format, e.g. "10:00"
+  /// v1.4.25 W4e — schema-convention fix. Prior to this release the DB
+  /// columns were the camelCase identifiers `"windowStart"` / `"windowEnd"`
+  /// because the original 0001_init migration omitted `@map`. The
+  /// Prisma client surface stays unchanged (`windowStart` /
+  /// `windowEnd`); only the underlying SQL identifier is renamed to
+  /// match the snake_case convention every other column on this model
+  /// already follows.
+  windowStart  String  @map("window_start") // HH:mm format, e.g. "08:00"
+  windowEnd    String  @map("window_end")   // HH:mm format, e.g. "10:00"
   label        String? // e.g. "Morning", "Evening"
   dose         String? // Per-schedule dose override; null = use Medication.dose
   daysOfWeek   String? @map("days_of_week") // Comma-separated day numbers (0=Sun..6=Sat), null = daily