diff --git a/tests/integration/routes/parity/__snapshots__/medications.01-list.json.snap b/tests/integration/routes/parity/__snapshots__/medications.01-list.json.snap
new file mode 100644
index 000000000..f9dd28d2e
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.01-list.json.snap
@@ -0,0 +1,170 @@
+{
+  "status": 200,
+  "body": {
+    "data": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": 1,
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>",
+        "schedules": [
+          {
+            "id": "<id:3>",
+            "medicationId": "<id:1>",
+            "windowStart": "08:00",
+            "windowEnd": "10:00",
+            "label": null,
+            "dose": null,
+            "unitsPerDose": null,
+            "daysOfWeek": null,
+            "timesOfDay": [
+              "08:00"
+            ],
+            "reminderGraceMinutes": null,
+            "rrule": "FREQ=DAILY",
+            "rollingIntervalDays": null,
+            "scheduleType": "SCHEDULED",
+            "cyclicOnWeeks": null,
+            "cyclicOffWeeks": null,
+            "doseWindows": null,
+            "resolvedUnitsPerDose": 1
+          }
+        ],
+        "hasIngredients": false,
+        "category": "OTHER",
+        "categoryLabel": null,
+        "courses": [],
+        "courseCount": 0,
+        "previousCourseEndedOn": null,
+        "canStartCourse": false,
+        "lastTakenAt": null,
+        "todayEventCount": 0,
+        "nextDueAt": "2026-10-16T06:00:00.000Z",
+        "remindersActive": true,
+        "nextDueOverdue": false,
+        "nextDueScheduleId": "<id:3>",
+        "courseStatus": "CURRENT",
+        "intakeActionable": true,
+        "stockUnitsRemaining": null,
+        "stockDosesRemaining": null,
+        "runwayDays": null
+      }
+    ],
+    "error": null
+  },
+  "events": [
+    {
+      "status": 200,
+      "action": {
+        "name": "medication.list"
+      },
+      "meta": {
+        "cache.medications.outcome": "miss",
+        "cache.medications.key_hash": "<key_hash>",
+        "count": 1
+      },
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [],
+    "ingredients": [],
+    "audit": [],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.02a-list-reader.json.snap b/tests/integration/routes/parity/__snapshots__/medications.02a-list-reader.json.snap
new file mode 100644
index 000000000..1a1069321
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.02a-list-reader.json.snap
@@ -0,0 +1,170 @@
+{
+  "status": 200,
+  "body": {
+    "data": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": 1,
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>",
+        "schedules": [
+          {
+            "id": "<id:3>",
+            "medicationId": "<id:1>",
+            "windowStart": "08:00",
+            "windowEnd": "10:00",
+            "label": null,
+            "dose": null,
+            "unitsPerDose": null,
+            "daysOfWeek": null,
+            "timesOfDay": [
+              "08:00"
+            ],
+            "reminderGraceMinutes": null,
+            "rrule": "FREQ=DAILY",
+            "rollingIntervalDays": null,
+            "scheduleType": "SCHEDULED",
+            "cyclicOnWeeks": null,
+            "cyclicOffWeeks": null,
+            "doseWindows": null,
+            "resolvedUnitsPerDose": 1
+          }
+        ],
+        "hasIngredients": false,
+        "category": "OTHER",
+        "categoryLabel": null,
+        "courses": [],
+        "courseCount": 0,
+        "previousCourseEndedOn": null,
+        "canStartCourse": false,
+        "lastTakenAt": null,
+        "todayEventCount": 0,
+        "nextDueAt": "2026-10-16T06:00:00.000Z",
+        "remindersActive": true,
+        "nextDueOverdue": false,
+        "nextDueScheduleId": "<id:3>",
+        "courseStatus": "CURRENT",
+        "intakeActionable": true,
+        "stockUnitsRemaining": null,
+        "stockDosesRemaining": null,
+        "runwayDays": null
+      }
+    ],
+    "error": null
+  },
+  "events": [
+    {
+      "status": 200,
+      "action": {
+        "name": "medication.list"
+      },
+      "meta": {
+        "cache.medications.outcome": "hit",
+        "cache.medications.key_hash": "<key_hash>",
+        "count": 1
+      },
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [],
+    "ingredients": [],
+    "audit": [],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.02b-list-anonymous.json.snap b/tests/integration/routes/parity/__snapshots__/medications.02b-list-anonymous.json.snap
new file mode 100644
index 000000000..45da3b863
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.02b-list-anonymous.json.snap
@@ -0,0 +1,95 @@
+{
+  "status": 401,
+  "body": {
+    "data": null,
+    "error": "Not authenticated",
+    "meta": {
+      "errorCode": "auth.missing",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 401,
+      "action": null,
+      "meta": null,
+      "warnings": null,
+      "error": {
+        "type": "HttpError",
+        "message": "Not authenticated"
+      }
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [],
+    "ingredients": [],
+    "audit": [],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.11-plain.json.snap b/tests/integration/routes/parity/__snapshots__/medications.11-plain.json.snap
new file mode 100644
index 000000000..8882ea379
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.11-plain.json.snap
@@ -0,0 +1,226 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Plain tablet",
+      "dose": "5mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": null,
+      "endsOn": null,
+      "oneShot": false,
+      "asNeeded": false,
+      "trackIntake": true,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "07:00",
+          "windowEnd": "09:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "07:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": "FREQ=DAILY",
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null,
+      "courses": [],
+      "courseCount": 0,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:5>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.12-full.json.snap b/tests/integration/routes/parity/__snapshots__/medications.12-full.json.snap
new file mode 100644
index 000000000..24775d467
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.12-full.json.snap
@@ -0,0 +1,334 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Full injection",
+      "dose": "1 pen",
+      "treatmentClass": "GLP1",
+      "dosesPerUnit": 4,
+      "unitsPerDose": 0.5,
+      "active": true,
+      "notificationsEnabled": false,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": "2026-10-10T00:00:00.000Z",
+      "endsOn": "2026-12-31T00:00:00.000Z",
+      "oneShot": false,
+      "asNeeded": false,
+      "trackIntake": true,
+      "autoMarkTaken": true,
+      "autoMarkTakenSince": "<now>",
+      "deliveryForm": "INJECTION",
+      "trackInjectionSites": true,
+      "allowedInjectionSites": [
+        "ABDOMEN_LEFT",
+        "THIGH_RIGHT"
+      ],
+      "liveActivityEnabled": true,
+      "criticalAlarmEnabled": true,
+      "atcCode": "A10BJ06",
+      "rxNormCode": "1991302",
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": 7,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "18:00",
+          "windowEnd": "20:00",
+          "label": "Evening",
+          "dose": "0.5 pen",
+          "unitsPerDose": 1,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "18:30"
+          ],
+          "reminderGraceMinutes": 45,
+          "rrule": "FREQ=WEEKLY;BYDAY=MO",
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": [
+            {
+              "end": "20:00",
+              "start": "18:00",
+              "timeOfDay": "18:30"
+            }
+          ],
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+      "categoryLabel": "Heart and circulation",
+      "courses": [
+        {
+          "id": "<id:4>",
+          "startsOn": "2026-10-10",
+          "endsOn": "2026-12-31",
+          "status": "CURRENT",
+          "takenDoses": 0,
+          "note": null
+        }
+      ],
+      "courseCount": 1,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:7>",
+        "medicationId": "<id:6>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:8>",
+        "medicationId": "<id:5>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:4>",
+        "medicationId": "<id:1>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:6>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.13a-as-needed.json.snap b/tests/integration/routes/parity/__snapshots__/medications.13a-as-needed.json.snap
new file mode 100644
index 000000000..c23aca305
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.13a-as-needed.json.snap
@@ -0,0 +1,344 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "As needed",
+      "dose": "400mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": null,
+      "endsOn": null,
+      "oneShot": false,
+      "asNeeded": true,
+      "trackIntake": true,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [],
+      "category": "PAIN_RELIEF",
+      "categoryLabel": null,
+      "courses": [],
+      "courseCount": 0,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:6>",
+        "medicationId": "<id:5>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:7>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:8>",
+        "medicationId": "<id:4>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:9>",
+        "medicationId": "<id:4>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:5>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:4>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:4>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.13b-one-shot.json.snap b/tests/integration/routes/parity/__snapshots__/medications.13b-one-shot.json.snap
new file mode 100644
index 000000000..a43296040
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.13b-one-shot.json.snap
@@ -0,0 +1,455 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "One shot",
+      "dose": "1 dose",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": "2026-10-20T00:00:00.000Z",
+      "endsOn": "2026-10-20T00:00:00.000Z",
+      "oneShot": true,
+      "asNeeded": false,
+      "trackIntake": true,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "09:00",
+          "windowEnd": "11:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "09:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": null,
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null,
+      "courses": [
+        {
+          "id": "<id:4>",
+          "startsOn": "2026-10-20",
+          "endsOn": "2026-10-20",
+          "status": "UPCOMING",
+          "takenDoses": 0,
+          "note": null
+        }
+      ],
+      "courseCount": 1,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:9>",
+        "medicationId": "<id:8>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:10>",
+        "medicationId": "<id:6>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:7>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "medicationId": "<id:1>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.13c-prn-and-legacy-days.json.snap b/tests/integration/routes/parity/__snapshots__/medications.13c-prn-and-legacy-days.json.snap
new file mode 100644
index 000000000..81a5f1d0c
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.13c-prn-and-legacy-days.json.snap
@@ -0,0 +1,599 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Mixed schedules",
+      "dose": "2mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": null,
+      "endsOn": null,
+      "oneShot": false,
+      "asNeeded": false,
+      "trackIntake": false,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [],
+      "recordedSchedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "06:00",
+          "windowEnd": "07:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "06:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": null,
+          "rollingIntervalDays": null,
+          "scheduleType": "PRN",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        },
+        {
+          "id": "<id:4>",
+          "medicationId": "<id:1>",
+          "windowStart": "21:00",
+          "windowEnd": "22:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": "i2;1,3,5",
+          "timesOfDay": [
+            "21:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": null,
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        },
+        {
+          "id": "<id:5>",
+          "medicationId": "<id:1>",
+          "windowStart": "12:00",
+          "windowEnd": "13:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "12:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": null,
+          "rollingIntervalDays": 3,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null,
+      "courses": [],
+      "courseCount": 0,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:10>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:7>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:9>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:5>",
+        "medicationId": "<id:1>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:8>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:4>",
+        "medicationId": "<id:1>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:8>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:9>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.13d-ended-window.json.snap b/tests/integration/routes/parity/__snapshots__/medications.13d-ended-window.json.snap
new file mode 100644
index 000000000..b12f37c1b
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.13d-ended-window.json.snap
@@ -0,0 +1,645 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Ended window",
+      "dose": "3mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": "2026-10-05T00:00:00.000Z",
+      "endsOn": "2026-10-05T00:00:00.000Z",
+      "oneShot": false,
+      "asNeeded": false,
+      "trackIntake": true,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "08:00",
+          "windowEnd": "09:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "08:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": "FREQ=DAILY",
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null,
+      "courses": [
+        {
+          "id": "<id:4>",
+          "startsOn": "2026-10-05",
+          "endsOn": "2026-10-05",
+          "status": "ENDED",
+          "takenDoses": 0,
+          "note": null
+        }
+      ],
+      "courseCount": 1,
+      "previousCourseEndedOn": "2026-10-05",
+      "canStartCourse": true
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:8>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:10>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:6>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:9>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:8>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:7>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:8>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:4>",
+        "medicationId": "<id:1>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:9>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.14a-unknown-category.json.snap b/tests/integration/routes/parity/__snapshots__/medications.14a-unknown-category.json.snap
new file mode 100644
index 000000000..b55686124
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.14a-unknown-category.json.snap
@@ -0,0 +1,574 @@
+{
+  "status": 422,
+  "body": {
+    "data": null,
+    "error": "Unknown medication category",
+    "meta": {
+      "errorCode": "medications.category.unknown",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 422,
+      "action": null,
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:9>",
+        "medicationId": "<id:6>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:10>",
+        "medicationId": "<id:8>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:7>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:6>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:5>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:6>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:3>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:3>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:3>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.14b-course-ends-before-start.json.snap b/tests/integration/routes/parity/__snapshots__/medications.14b-course-ends-before-start.json.snap
new file mode 100644
index 000000000..5cc3ae9de
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.14b-course-ends-before-start.json.snap
@@ -0,0 +1,583 @@
+{
+  "status": 422,
+  "body": {
+    "data": null,
+    "error": "Validation failed",
+    "details": {
+      "issues": [
+        {
+          "path": "endsOn",
+          "code": "custom",
+          "message": "endsOn must be on or after startsOn"
+        }
+      ]
+    },
+    "meta": {
+      "errorCode": "http.invalid",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 422,
+      "action": null,
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:9>",
+        "medicationId": "<id:6>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:10>",
+        "medicationId": "<id:8>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:7>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:6>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:5>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:6>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:3>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:3>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:3>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.14c-one-shot-two-schedules.json.snap b/tests/integration/routes/parity/__snapshots__/medications.14c-one-shot-two-schedules.json.snap
new file mode 100644
index 000000000..688566769
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.14c-one-shot-two-schedules.json.snap
@@ -0,0 +1,574 @@
+{
+  "status": 422,
+  "body": {
+    "data": null,
+    "error": "A one-shot medication can have at most one schedule",
+    "meta": {
+      "errorCode": "http.invalid",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 422,
+      "action": null,
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:9>",
+        "medicationId": "<id:6>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:10>",
+        "medicationId": "<id:8>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:7>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:6>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:5>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:6>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:3>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:3>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:3>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.14d-one-shot-recurrence.json.snap b/tests/integration/routes/parity/__snapshots__/medications.14d-one-shot-recurrence.json.snap
new file mode 100644
index 000000000..85ecda70f
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.14d-one-shot-recurrence.json.snap
@@ -0,0 +1,574 @@
+{
+  "status": 422,
+  "body": {
+    "data": null,
+    "error": "A one-shot medication cannot have a recurrence (rrule or rollingIntervalDays)",
+    "meta": {
+      "errorCode": "http.invalid",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 422,
+      "action": null,
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:9>",
+        "medicationId": "<id:6>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:10>",
+        "medicationId": "<id:8>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:7>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:6>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:5>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:6>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:3>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:3>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:3>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.14e-unstable-concept-id.json.snap b/tests/integration/routes/parity/__snapshots__/medications.14e-unstable-concept-id.json.snap
new file mode 100644
index 000000000..a2b535824
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.14e-unstable-concept-id.json.snap
@@ -0,0 +1,589 @@
+{
+  "status": 422,
+  "body": {
+    "data": null,
+    "error": "Validation failed",
+    "details": {
+      "issues": [
+        {
+          "path": "externalId",
+          "code": "custom",
+          "message": "external identifier must be stable across app restarts; received an object description (<Class: 0x…>), which embeds a memory address and is a new value on every launch — serialise the identity itself, not the object's description"
+        }
+      ]
+    },
+    "meta": {
+      "errorCode": "http.invalid",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 422,
+      "action": {
+        "name": "medication.external_id.rejected"
+      },
+      "meta": {
+        "external_id_rejected": 1,
+        "external_id_shapes": "object_description",
+        "external_id_surface": "medication.create"
+      },
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:9>",
+        "medicationId": "<id:6>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:10>",
+        "medicationId": "<id:8>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:7>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:6>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:5>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:6>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:3>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:3>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:3>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.14f-invalid.json.snap b/tests/integration/routes/parity/__snapshots__/medications.14f-invalid.json.snap
new file mode 100644
index 000000000..c0abd73eb
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.14f-invalid.json.snap
@@ -0,0 +1,593 @@
+{
+  "status": 422,
+  "body": {
+    "data": null,
+    "error": "Validation failed",
+    "details": {
+      "issues": [
+        {
+          "path": "name",
+          "code": "too_small",
+          "message": "Too small: expected string to have >=1 characters"
+        },
+        {
+          "path": "dose",
+          "code": "invalid_type",
+          "message": "Invalid input: expected string, received number"
+        },
+        {
+          "path": "schedules",
+          "code": "invalid_type",
+          "message": "Invalid input: expected array, received string"
+        }
+      ]
+    },
+    "meta": {
+      "errorCode": "http.invalid",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 422,
+      "action": null,
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:9>",
+        "medicationId": "<id:6>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:10>",
+        "medicationId": "<id:8>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:7>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:6>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:5>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:6>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:3>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:3>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:3>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.15a-mirror.json.snap b/tests/integration/routes/parity/__snapshots__/medications.15a-mirror.json.snap
new file mode 100644
index 000000000..302f69f2d
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.15a-mirror.json.snap
@@ -0,0 +1,706 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Mirrored",
+      "dose": "50mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": null,
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+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": "APPLE_HEALTH",
+      "externalId": "hk-concept-0001",
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "08:00",
+          "windowEnd": "09:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "08:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": "FREQ=DAILY",
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null,
+      "courses": [],
+      "courseCount": 0,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
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+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
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+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
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+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
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+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
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+        "criticalAlarmEnabled": false,
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+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
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+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
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+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
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+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Mirrored",
+        "dose": "50mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-concept-0001",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
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+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:8>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:10>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:5>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:6>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:9>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:8>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:7>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:8>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:20>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:21>",
+        "medicationId": "<id:9>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:4>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:4>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Mirrored",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.15b-mirror-replay.json.snap b/tests/integration/routes/parity/__snapshots__/medications.15b-mirror-replay.json.snap
new file mode 100644
index 000000000..25c308749
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.15b-mirror-replay.json.snap
@@ -0,0 +1,704 @@
+{
+  "status": 200,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Mirrored",
+      "dose": "50mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": null,
+      "endsOn": null,
+      "oneShot": false,
+      "asNeeded": false,
+      "trackIntake": true,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": "APPLE_HEALTH",
+      "externalId": "hk-concept-0001",
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "08:00",
+          "windowEnd": "09:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "08:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": "FREQ=DAILY",
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 200,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": {
+        "idempotent_replay": true
+      },
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Mirrored",
+        "dose": "50mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-concept-0001",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:11>",
+        "medicationId": "<id:8>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:10>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:5>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:6>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:9>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:8>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:7>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:8>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:20>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:21>",
+        "medicationId": "<id:9>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:4>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:4>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Mirrored",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.16-mirror-cap.json.snap b/tests/integration/routes/parity/__snapshots__/medications.16-mirror-cap.json.snap
new file mode 100644
index 000000000..a7712a941
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.16-mirror-cap.json.snap
@@ -0,0 +1,1061 @@
+{
+  "status": 422,
+  "body": {
+    "data": null,
+    "error": "This account already mirrors the maximum number of medications from an external source",
+    "meta": {
+      "errorCode": "medications.mirror.limit_exceeded",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 422,
+      "action": {
+        "name": "medication.mirror.limit_exceeded"
+      },
+      "meta": {
+        "existing": 30
+      },
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Mirror 00",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-00",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Mirror 01",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
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+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
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+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-22",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:25>",
+        "userId": "<id:2>",
+        "name": "Mirror 23",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
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+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-23",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:26>",
+        "userId": "<id:2>",
+        "name": "Mirror 24",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
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+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-24",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:27>",
+        "userId": "<id:2>",
+        "name": "Mirror 25",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
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+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
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+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-25",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:28>",
+        "userId": "<id:2>",
+        "name": "Mirror 26",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
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+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
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+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
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+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-26",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:29>",
+        "userId": "<id:2>",
+        "name": "Mirror 27",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
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+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-27",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:30>",
+        "userId": "<id:2>",
+        "name": "Mirror 28",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
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+        "endsOn": null,
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+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-28",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:31>",
+        "userId": "<id:2>",
+        "name": "Mirror 29",
+        "dose": "1mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-cap-29",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [],
+    "ingredients": [],
+    "audit": [],
+    "idempotency": []
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.17a-idempotent-first.json.snap b/tests/integration/routes/parity/__snapshots__/medications.17a-idempotent-first.json.snap
new file mode 100644
index 000000000..d6d186d9a
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.17a-idempotent-first.json.snap
@@ -0,0 +1,786 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Retried",
+      "dose": "10mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": null,
+      "endsOn": null,
+      "oneShot": false,
+      "asNeeded": false,
+      "trackIntake": true,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "08:00",
+          "windowEnd": "09:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "08:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": "FREQ=DAILY",
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null,
+      "courses": [],
+      "courseCount": 0,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
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+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
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+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
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+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
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+        "criticalAlarmEnabled": false,
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+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Mirrored",
+        "dose": "50mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
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+        "deliveryForm": "ORAL",
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+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-concept-0001",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
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+        "deliveryForm": "ORAL",
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+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
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+        "criticalAlarmEnabled": false,
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+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:11>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
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+        "deliveryForm": "ORAL",
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+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
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+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Retried",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
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+        "startsOn": null,
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+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
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+        "lowStockNotifiedAt": null,
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+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:9>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:11>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:5>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:8>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:6>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:10>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:9>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:7>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:20>",
+        "medicationId": "<id:9>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:21>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:22>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:23>",
+        "medicationId": "<id:10>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:11>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:4>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:4>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Mirrored",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:11>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Retried",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": [
+      {
+        "userId": "<id:2>",
+        "key": "<id:24>",
+        "method": "POST",
+        "path": "/api/medications",
+        "responseStatus": 201,
+        "requestFingerprint": "717bc7f22eaede79d3d0ec9e0197c6fae152d91ae21b29662ebbe2b02d7bd896",
+        "expiresAt": "2026-10-16T12:00:00.000Z"
+      }
+    ]
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.17b-idempotent-replay.json.snap b/tests/integration/routes/parity/__snapshots__/medications.17b-idempotent-replay.json.snap
new file mode 100644
index 000000000..478f992f5
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.17b-idempotent-replay.json.snap
@@ -0,0 +1,787 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Retried",
+      "dose": "10mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": null,
+      "endsOn": null,
+      "oneShot": false,
+      "asNeeded": false,
+      "trackIntake": true,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "08:00",
+          "windowEnd": "09:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "08:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": "FREQ=DAILY",
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null,
+      "courses": [],
+      "courseCount": 0,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "idempotency.replay"
+      },
+      "meta": {
+        "method": "POST",
+        "path": "/api/medications"
+      },
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Mirrored",
+        "dose": "50mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-concept-0001",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:11>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Retried",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:9>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:11>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:5>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:8>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:6>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:10>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:9>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:7>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:20>",
+        "medicationId": "<id:9>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:21>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:22>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:23>",
+        "medicationId": "<id:10>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:11>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:4>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:4>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Mirrored",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:11>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Retried",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": [
+      {
+        "userId": "<id:2>",
+        "key": "<id:24>",
+        "method": "POST",
+        "path": "/api/medications",
+        "responseStatus": 201,
+        "requestFingerprint": "717bc7f22eaede79d3d0ec9e0197c6fae152d91ae21b29662ebbe2b02d7bd896",
+        "expiresAt": "2026-10-16T12:00:00.000Z"
+      }
+    ]
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.18a-writer.json.snap b/tests/integration/routes/parity/__snapshots__/medications.18a-writer.json.snap
new file mode 100644
index 000000000..ca74c6b43
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.18a-writer.json.snap
@@ -0,0 +1,856 @@
+{
+  "status": 201,
+  "body": {
+    "data": {
+      "id": "<id:1>",
+      "userId": "<id:2>",
+      "name": "Brought by a delegate",
+      "dose": "20mg",
+      "treatmentClass": "GENERIC",
+      "dosesPerUnit": null,
+      "unitsPerDose": 1,
+      "active": true,
+      "notificationsEnabled": true,
+      "pausedAt": null,
+      "snoozedUntil": null,
+      "startsOn": null,
+      "endsOn": null,
+      "oneShot": false,
+      "asNeeded": false,
+      "trackIntake": true,
+      "autoMarkTaken": false,
+      "autoMarkTakenSince": null,
+      "deliveryForm": "ORAL",
+      "trackInjectionSites": false,
+      "allowedInjectionSites": [],
+      "liveActivityEnabled": false,
+      "criticalAlarmEnabled": false,
+      "atcCode": null,
+      "rxNormCode": null,
+      "lowStockNotifiedAt": null,
+      "lowStockNotifiedThresholdDays": null,
+      "reorderLeadDays": null,
+      "externalSource": null,
+      "externalId": null,
+      "createdAt": "<createdAt>",
+      "updatedAt": "<updatedAt>",
+      "schedules": [
+        {
+          "id": "<id:3>",
+          "medicationId": "<id:1>",
+          "windowStart": "08:00",
+          "windowEnd": "09:00",
+          "label": null,
+          "dose": null,
+          "unitsPerDose": null,
+          "daysOfWeek": null,
+          "timesOfDay": [
+            "08:00"
+          ],
+          "reminderGraceMinutes": null,
+          "rrule": "FREQ=DAILY",
+          "rollingIntervalDays": null,
+          "scheduleType": "SCHEDULED",
+          "cyclicOnWeeks": null,
+          "cyclicOffWeeks": null,
+          "doseWindows": null,
+          "resolvedUnitsPerDose": 1
+        }
+      ],
+      "category": "OTHER",
+      "categoryLabel": null,
+      "courses": [],
+      "courseCount": 0,
+      "previousCourseEndedOn": null,
+      "canStartCourse": false
+    },
+    "error": null
+  },
+  "events": [
+    {
+      "status": 201,
+      "action": {
+        "name": "medication.create",
+        "entity_type": "medication",
+        "entity_id": "<id:1>"
+      },
+      "meta": null,
+      "warnings": null,
+      "error": null
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "Brought by a delegate",
+        "dose": "20mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Mirrored",
+        "dose": "50mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-concept-0001",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:11>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:12>",
+        "userId": "<id:2>",
+        "name": "Retried",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:9>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:11>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:5>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:8>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:12>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:3>",
+        "medicationId": "<id:1>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:6>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:10>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:20>",
+        "medicationId": "<id:9>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:21>",
+        "medicationId": "<id:7>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:22>",
+        "medicationId": "<id:9>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:23>",
+        "medicationId": "<id:5>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:24>",
+        "medicationId": "<id:7>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:25>",
+        "medicationId": "<id:10>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:11>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:5>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:12>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:4>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": "<id:26>",
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "Brought by a delegate",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:4>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:5>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Mirrored",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:11>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:12>",
+          "name": "Retried",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": [
+      {
+        "userId": "<id:2>",
+        "key": "<id:27>",
+        "method": "POST",
+        "path": "/api/medications",
+        "responseStatus": 201,
+        "requestFingerprint": "717bc7f22eaede79d3d0ec9e0197c6fae152d91ae21b29662ebbe2b02d7bd896",
+        "expiresAt": "2026-10-16T12:00:00.000Z"
+      }
+    ]
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.18b-reader.json.snap b/tests/integration/routes/parity/__snapshots__/medications.18b-reader.json.snap
new file mode 100644
index 000000000..ee5305870
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.18b-reader.json.snap
@@ -0,0 +1,799 @@
+{
+  "status": 403,
+  "body": {
+    "data": null,
+    "error": "Account access denied",
+    "meta": {
+      "errorCode": "sharing.access.denied",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 403,
+      "action": null,
+      "meta": {
+        "sharing_refusal": "insufficient_access"
+      },
+      "warnings": null,
+      "error": {
+        "type": "SharingAccessDeniedError",
+        "message": "Account access denied"
+      }
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Brought by a delegate",
+        "dose": "20mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Mirrored",
+        "dose": "50mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-concept-0001",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:11>",
+        "userId": "<id:2>",
+        "name": "Retried",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:8>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:10>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:7>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:11>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:5>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:9>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:20>",
+        "medicationId": "<id:8>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:21>",
+        "medicationId": "<id:6>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:22>",
+        "medicationId": "<id:8>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:23>",
+        "medicationId": "<id:4>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:24>",
+        "medicationId": "<id:6>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:25>",
+        "medicationId": "<id:9>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:4>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:11>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:3>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": "<id:26>",
+        "details": {
+          "medicationId": "<id:3>",
+          "name": "Brought by a delegate",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:4>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Mirrored",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:11>",
+          "name": "Retried",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": [
+      {
+        "userId": "<id:2>",
+        "key": "<id:27>",
+        "method": "POST",
+        "path": "/api/medications",
+        "responseStatus": 201,
+        "requestFingerprint": "717bc7f22eaede79d3d0ec9e0197c6fae152d91ae21b29662ebbe2b02d7bd896",
+        "expiresAt": "2026-10-16T12:00:00.000Z"
+      }
+    ]
+  }
+}
diff --git a/tests/integration/routes/parity/__snapshots__/medications.19-anonymous.json.snap b/tests/integration/routes/parity/__snapshots__/medications.19-anonymous.json.snap
new file mode 100644
index 000000000..5a4de87eb
--- /dev/null
+++ b/tests/integration/routes/parity/__snapshots__/medications.19-anonymous.json.snap
@@ -0,0 +1,797 @@
+{
+  "status": 401,
+  "body": {
+    "data": null,
+    "error": "Not authenticated",
+    "meta": {
+      "errorCode": "auth.missing",
+      "requestId": "<requestId>"
+    }
+  },
+  "events": [
+    {
+      "status": 401,
+      "action": null,
+      "meta": null,
+      "warnings": null,
+      "error": {
+        "type": "HttpError",
+        "message": "Not authenticated"
+      }
+    }
+  ],
+  "effects": [],
+  "stored": {
+    "medications": [
+      {
+        "id": "<id:1>",
+        "userId": "<id:2>",
+        "name": "As needed",
+        "dose": "400mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": true,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:3>",
+        "userId": "<id:2>",
+        "name": "Brought by a delegate",
+        "dose": "20mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:4>",
+        "userId": "<id:2>",
+        "name": "Ended window",
+        "dose": "3mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:5>",
+        "userId": "<id:2>",
+        "name": "Existing tablet",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-01T00:00:00.000Z",
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:6>",
+        "userId": "<id:2>",
+        "name": "Full injection",
+        "dose": "1 pen",
+        "treatmentClass": "GLP1",
+        "dosesPerUnit": 4,
+        "unitsPerDose": "0.5",
+        "active": true,
+        "notificationsEnabled": false,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": true,
+        "autoMarkTakenSince": "<now>",
+        "deliveryForm": "INJECTION",
+        "trackInjectionSites": true,
+        "allowedInjectionSites": [
+          "ABDOMEN_LEFT",
+          "THIGH_RIGHT"
+        ],
+        "liveActivityEnabled": true,
+        "criticalAlarmEnabled": true,
+        "atcCode": "A10BJ06",
+        "rxNormCode": "1991302",
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": 7,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:7>",
+        "userId": "<id:2>",
+        "name": "Mirrored",
+        "dose": "50mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": "APPLE_HEALTH",
+        "externalId": "hk-concept-0001",
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:8>",
+        "userId": "<id:2>",
+        "name": "Mixed schedules",
+        "dose": "2mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": false,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:9>",
+        "userId": "<id:2>",
+        "name": "One shot",
+        "dose": "1 dose",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "oneShot": true,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:10>",
+        "userId": "<id:2>",
+        "name": "Plain tablet",
+        "dose": "5mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:11>",
+        "userId": "<id:2>",
+        "name": "Retried",
+        "dose": "10mg",
+        "treatmentClass": "GENERIC",
+        "dosesPerUnit": null,
+        "unitsPerDose": "1",
+        "active": true,
+        "notificationsEnabled": true,
+        "pausedAt": null,
+        "snoozedUntil": null,
+        "startsOn": null,
+        "endsOn": null,
+        "oneShot": false,
+        "asNeeded": false,
+        "trackIntake": true,
+        "autoMarkTaken": false,
+        "autoMarkTakenSince": null,
+        "deliveryForm": "ORAL",
+        "trackInjectionSites": false,
+        "allowedInjectionSites": [],
+        "liveActivityEnabled": false,
+        "criticalAlarmEnabled": false,
+        "atcCode": null,
+        "rxNormCode": null,
+        "lowStockNotifiedAt": null,
+        "lowStockNotifiedThresholdDays": null,
+        "reorderLeadDays": null,
+        "externalSource": null,
+        "externalId": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "schedules": [
+      {
+        "id": "<id:12>",
+        "medicationId": "<id:8>",
+        "windowStart": "06:00",
+        "windowEnd": "07:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "06:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "PRN",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:13>",
+        "medicationId": "<id:10>",
+        "windowStart": "07:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "07:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:14>",
+        "medicationId": "<id:4>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:15>",
+        "medicationId": "<id:7>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:16>",
+        "medicationId": "<id:11>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:17>",
+        "medicationId": "<id:3>",
+        "windowStart": "08:00",
+        "windowEnd": "09:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:18>",
+        "medicationId": "<id:5>",
+        "windowStart": "08:00",
+        "windowEnd": "10:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "08:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": "FREQ=DAILY",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:19>",
+        "medicationId": "<id:9>",
+        "windowStart": "09:00",
+        "windowEnd": "11:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "09:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:20>",
+        "medicationId": "<id:8>",
+        "windowStart": "12:00",
+        "windowEnd": "13:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "12:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": 3,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      },
+      {
+        "id": "<id:21>",
+        "medicationId": "<id:6>",
+        "windowStart": "18:00",
+        "windowEnd": "20:00",
+        "label": "Evening",
+        "dose": "0.5 pen",
+        "unitsPerDose": "1",
+        "daysOfWeek": null,
+        "timesOfDay": [
+          "18:30"
+        ],
+        "reminderGraceMinutes": 45,
+        "rrule": "FREQ=WEEKLY;BYDAY=MO",
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": [
+          {
+            "end": "20:00",
+            "start": "18:00",
+            "timeOfDay": "18:30"
+          }
+        ]
+      },
+      {
+        "id": "<id:22>",
+        "medicationId": "<id:8>",
+        "windowStart": "21:00",
+        "windowEnd": "22:00",
+        "label": null,
+        "dose": null,
+        "unitsPerDose": null,
+        "daysOfWeek": "i2;1,3,5",
+        "timesOfDay": [
+          "21:00"
+        ],
+        "reminderGraceMinutes": null,
+        "rrule": null,
+        "rollingIntervalDays": null,
+        "scheduleType": "SCHEDULED",
+        "cyclicOnWeeks": null,
+        "cyclicOffWeeks": null,
+        "doseWindows": null
+      }
+    ],
+    "revisions": [],
+    "pauseEras": [],
+    "courses": [
+      {
+        "id": "<id:23>",
+        "medicationId": "<id:4>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-05T00:00:00.000Z",
+        "endsOn": "2026-10-05T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:24>",
+        "medicationId": "<id:6>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-10T00:00:00.000Z",
+        "endsOn": "2026-12-31T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "id": "<id:25>",
+        "medicationId": "<id:9>",
+        "userId": "<id:2>",
+        "startsOn": "2026-10-20T00:00:00.000Z",
+        "endsOn": "2026-10-20T00:00:00.000Z",
+        "noteEncrypted": null,
+        "createdAt": "<createdAt>",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "intakes": [],
+    "doseChanges": [],
+    "inventoryItems": [],
+    "inventoryEvents": [],
+    "categories": [
+      {
+        "medicationId": "<id:10>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:9>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:8>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:4>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:7>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:11>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:3>",
+        "category": "OTHER",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:1>",
+        "category": "PAIN_RELIEF",
+        "updatedAt": "<updatedAt>"
+      },
+      {
+        "medicationId": "<id:6>",
+        "category": "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13",
+        "updatedAt": "<updatedAt>"
+      }
+    ],
+    "ingredients": [],
+    "audit": [
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": "<id:26>",
+        "details": {
+          "medicationId": "<id:3>",
+          "name": "Brought by a delegate",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:1>",
+          "name": "As needed",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:4>",
+          "name": "Ended window",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:6>",
+          "name": "Full injection",
+          "autoMarkTaken": true
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:7>",
+          "name": "Mirrored",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:8>",
+          "name": "Mixed schedules",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:9>",
+          "name": "One shot",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:10>",
+          "name": "Plain tablet",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      },
+      {
+        "action": "medication.create",
+        "userId": "<id:2>",
+        "actorUserId": null,
+        "details": {
+          "medicationId": "<id:11>",
+          "name": "Retried",
+          "autoMarkTaken": false
+        },
+        "ipAddress": null
+      }
+    ],
+    "idempotency": [
+      {
+        "userId": "<id:2>",
+        "key": "<id:27>",
+        "method": "POST",
+        "path": "/api/medications",
+        "responseStatus": 201,
+        "requestFingerprint": "717bc7f22eaede79d3d0ec9e0197c6fae152d91ae21b29662ebbe2b02d7bd896",
+        "expiresAt": "2026-10-16T12:00:00.000Z"
+      }
+    ]
+  }
+}
diff --git a/tests/integration/routes/parity/medication-state.ts b/tests/integration/routes/parity/medication-state.ts
index 1103d75fa..b73829783 100644
--- a/tests/integration/routes/parity/medication-state.ts
+++ b/tests/integration/routes/parity/medication-state.ts
@@ -186,6 +186,21 @@ export async function medicationState(prisma: Client, userIds: string[]) {
   };
 }
 
+/**
+ * A server cache reports the hash of the key it looked up, and the key holds
+ * the account id, so the hash differs on every run. Its presence is kept.
+ */
+function withoutCacheKeyHashes(facts: unknown): unknown {
+  if (!facts || typeof facts !== "object") return facts;
+  const { meta } = facts as { meta?: unknown };
+  if (!meta || typeof meta !== "object") return facts;
+  const cleaned: Record<string, unknown> = {};
+  for (const [k, v] of Object.entries(meta)) {
+    cleaned[k] = /^cache\..+\.key_hash$/.test(k) ? "<key_hash>" : v;
+  }
+  return { ...facts, meta: cleaned };
+}
+
 export interface ParityCall {
   /** Snapshot name, `<route>.<case>`. */
   name: string;
@@ -215,7 +230,7 @@ export async function parityStep(call: ParityCall) {
       {
         status: res.status,
         body: res.body,
-        events: events.map(eventFacts),
+        events: events.map(eventFacts).map(withoutCacheKeyHashes),
         effects: effectRecorder.take(),
         stored: await medicationState(getPrismaClient(), call.userIds),
       },
diff --git a/tests/integration/routes/parity/medications.parity.test.ts b/tests/integration/routes/parity/medications.parity.test.ts
new file mode 100644
index 000000000..028bfffa6
--- /dev/null
+++ b/tests/integration/routes/parity/medications.parity.test.ts
@@ -0,0 +1,344 @@
+/**
+ * Parity for `GET` and `POST /api/medications` while the create moves into
+ * `src/lib/medications/`.
+ *
+ * One record walks through the cases the route tells apart, in order, each
+ * request seeing what the earlier ones stored: the list for its owner, for a
+ * reading delegate and for nobody; a plain create, a full one with a custom
+ * category, a course window and doses recorded automatically, an as-needed
+ * one, a one-shot one and a PRN schedule; the refusals (an unknown category,
+ * a course that ends before it starts, the two one-shot shapes, an unstable
+ * concept id, a body the schema refuses); a mirrored create, its replay, and
+ * the mirror cap on a second account; an idempotent retry; and creates by a
+ * delegate who may write and one who may only read. After each request the
+ * snapshot holds the response, the wide event and every medication row of
+ * the accounts.
+ *
+ * The clock is pinned (`Date` only), so the snapshot is the same on every
+ * day it runs.
+ */
+import { afterAll, beforeAll, describe, it, vi } from "vitest";
+
+import { GET, POST } from "@/app/api/medications/route";
+import { encryptToBytes } from "@/lib/ai/coach/bytes-codec";
+
+import { anonymous, type RouteAuth } from "../../../kit/call-route";
+import { makeMedication, makeSession, makeUser } from "../../../kit/factories";
+import { getPrismaClient, truncateAllTables } from "../../setup";
+import { delegateOf, parityStep } from "./medication-state";
+
+vi.mock("@/lib/logging/transports", async (importOriginal) => {
+  const actual =
+    await importOriginal<typeof import("@/lib/logging/transports")>();
+  const { wideEventRecorder: recorder } = await import("../../../kit/parity");
+  return {
+    ...actual,
+    emitIfSampled: (event: (typeof recorder.events)[number]) => {
+      recorder.events.push(event);
+    },
+  };
+});
+
+const prisma = getPrismaClient();
+const NOW = new Date("2026-10-15T12:00:00.000Z");
+const ROUTE = "/api/medications";
+/**
+ * The create answers without the read-model fields (reminder state, course
+ * status, stock and runway) the registered medication resource declares. The
+ * parity snapshot pins that answer as it is; the contract check is the
+ * route's own tests' business.
+ */
+const CREATE_ANSWER = {
+  skip: "the create answers without the read-model fields of the resource",
+};
+const CUSTOM_KEY = "custom:5b1f7c2e-4d3a-4b8e-9c61-2a7d0e9f4c13";
+
+let ownerId: string;
+let userIds: string[];
+let owner: RouteAuth;
+let writer: { auth: RouteAuth; headers: Record<string, string> };
+let reader: { auth: RouteAuth; headers: Record<string, string> };
+
+async function list(
+  name: string,
+  options: { auth?: RouteAuth; headers?: Record<string, string> } = {},
+) {
+  await parityStep({
+    name: `medications.${name}`,
+    handler: GET,
+    options: {
+      method: "GET",
+      route: ROUTE,
+      auth: options.auth ?? owner,
+      headers: options.headers,
+    },
+    userIds,
+    now: NOW,
+  });
+}
+
+async function create(
+  name: string,
+  body: unknown,
+  options: {
+    auth?: RouteAuth;
+    headers?: Record<string, string>;
+    userIds?: string[];
+  } = {},
+) {
+  await parityStep({
+    name: `medications.${name}`,
+    handler: POST,
+    options: {
+      method: "POST",
+      route: ROUTE,
+      body,
+      auth: options.auth ?? owner,
+      headers: options.headers,
+      contract: CREATE_ANSWER,
+    },
+    userIds: options.userIds ?? userIds,
+    now: NOW,
+  });
+}
+
+const schedule = (windowStart: string, windowEnd: string, extra = {}) => ({
+  windowStart,
+  windowEnd,
+  ...extra,
+});
+
+beforeAll(async () => {
+  vi.useFakeTimers({ toFake: ["Date"], now: NOW });
+  await truncateAllTables(prisma);
+  const user = await makeUser({ timezone: "Europe/Berlin" });
+  ownerId = user.id;
+  owner = await makeSession(user);
+  await makeMedication(
+    user,
+    {
+      name: "Existing tablet",
+      startsOn: new Date("2026-10-01"),
+      createdAt: new Date("2026-10-01T06:00:00.000Z"),
+    },
+    [
+      {
+        windowStart: "08:00",
+        windowEnd: "10:00",
+        timesOfDay: ["08:00"],
+        rrule: "FREQ=DAILY",
+      },
+    ],
+  );
+  await prisma.medicationCategoryLabel.create({
+    data: {
+      userId: ownerId,
+      key: CUSTOM_KEY,
+      labelEncrypted: encryptToBytes("Heart and circulation"),
+    },
+  });
+  const w = await delegateOf(prisma, user, "WRITE");
+  const r = await delegateOf(prisma, user, "READ");
+  writer = { auth: w.auth, headers: w.headers };
+  reader = { auth: r.auth, headers: r.headers };
+  userIds = [ownerId, w.delegate.id, r.delegate.id];
+});
+
+afterAll(() => {
+  vi.useRealTimers();
+});
+
+describe("GET /api/medications parity", () => {
+  it("01 the owner's list", async () => {
+    await list("01-list");
+  });
+
+  it("02 a reading delegate's view of it, and nobody's", async () => {
+    await list("02a-list-reader", reader);
+    await list("02b-list-anonymous", { auth: anonymous });
+  });
+});
+
+describe("POST /api/medications parity", () => {
+  it("11 a plain create", async () => {
+    await create("11-plain", {
+      name: "Plain tablet",
+      dose: "5mg",
+      schedules: [schedule("07:00", "09:00")],
+    });
+  });
+
+  it("12 a full create with a custom category, a course and auto-take", async () => {
+    await create("12-full", {
+      name: "Full injection",
+      dose: "1 pen",
+      category: CUSTOM_KEY,
+      treatmentClass: "GLP1",
+      dosesPerUnit: 4,
+      unitsPerDose: 0.5,
+      reorderLeadDays: 7,
+      deliveryForm: "INJECTION",
+      trackInjectionSites: true,
+      allowedInjectionSites: ["ABDOMEN_LEFT", "THIGH_RIGHT"],
+      notificationsEnabled: false,
+      liveActivityEnabled: true,
+      criticalAlarmEnabled: true,
+      atcCode: "A10BJ06",
+      rxNormCode: "1991302",
+      startsOn: "2026-10-10",
+      endsOn: "2026-12-31",
+      autoMarkTaken: true,
+      schedules: [
+        schedule("18:00", "20:00", {
+          label: "Evening",
+          dose: "0.5 pen",
+          unitsPerDose: 1,
+          timesOfDay: ["18:30"],
+          reminderGraceMinutes: 45,
+          rrule: "FREQ=WEEKLY;BYDAY=MO",
+          doseWindows: [{ timeOfDay: "18:30", start: "18:00", end: "20:00" }],
+        }),
+      ],
+    });
+  });
+
+  it("13 an as-needed create, a one-shot one and a PRN schedule", async () => {
+    await create("13a-as-needed", {
+      name: "As needed",
+      dose: "400mg",
+      category: "PAIN_RELIEF",
+      asNeeded: true,
+    });
+    await create("13b-one-shot", {
+      name: "One shot",
+      dose: "1 dose",
+      oneShot: true,
+      startsOn: "2026-10-20",
+      endsOn: "2026-11-20",
+      schedules: [schedule("09:00", "11:00")],
+    });
+    await create("13c-prn-and-legacy-days", {
+      name: "Mixed schedules",
+      dose: "2mg",
+      trackIntake: false,
+      schedules: [
+        schedule("06:00", "07:00", { scheduleType: "PRN" }),
+        schedule("21:00", "22:00", { daysOfWeek: [1, 3, 5], intervalWeeks: 2 }),
+        schedule("12:00", "13:00", { rollingIntervalDays: 3 }),
+      ],
+    });
+    await create("13d-ended-window", {
+      name: "Ended window",
+      dose: "3mg",
+      endsOn: "2026-10-05",
+      schedules: [schedule("08:00", "09:00")],
+    });
+  });
+
+  it("14 the refusals", async () => {
+    await create("14a-unknown-category", {
+      name: "Unknown category",
+      dose: "1mg",
+      category: "custom:0a6c2d4e-1111-4222-8333-944455556666",
+      schedules: [schedule("08:00", "09:00")],
+    });
+    await create("14b-course-ends-before-start", {
+      name: "Backwards course",
+      dose: "1mg",
+      startsOn: "2026-10-20",
+      endsOn: "2026-10-10",
+      schedules: [schedule("08:00", "09:00")],
+    });
+    await create("14c-one-shot-two-schedules", {
+      name: "One shot twice",
+      dose: "1mg",
+      oneShot: true,
+      startsOn: "2026-10-20",
+      schedules: [schedule("08:00", "09:00"), schedule("20:00", "21:00")],
+    });
+    await create("14d-one-shot-recurrence", {
+      name: "One shot recurring",
+      dose: "1mg",
+      oneShot: true,
+      startsOn: "2026-10-20",
+      schedules: [schedule("08:00", "09:00", { rrule: "FREQ=DAILY" })],
+    });
+    await create("14e-unstable-concept-id", {
+      name: "Phantom",
+      dose: "1mg",
+      externalSource: "APPLE_HEALTH",
+      externalId: "<HKMedicationConcept: 0x600003a1c0c0>",
+      schedules: [schedule("08:00", "09:00")],
+    });
+    await create("14f-invalid", { name: "", dose: 5, schedules: "daily" });
+  });
+
+  it("15 a mirrored create and its replay", async () => {
+    const mirrored = {
+      name: "Mirrored",
+      dose: "50mg",
+      externalSource: "APPLE_HEALTH",
+      externalId: "hk-concept-0001",
+      schedules: [schedule("08:00", "09:00")],
+    };
+    await create("15a-mirror", mirrored);
+    await create("15b-mirror-replay", { ...mirrored, name: "Renamed" });
+  });
+
+  it("16 the mirror cap", async () => {
+    const capped = await makeUser({ timezone: "UTC" });
+    await prisma.medication.createMany({
+      data: Array.from({ length: 30 }, (_, i) => ({
+        userId: capped.id,
+        name: `Mirror ${String(i).padStart(2, "0")}`,
+        dose: "1mg",
+        externalSource: "APPLE_HEALTH" as const,
+        externalId: `hk-cap-${String(i).padStart(2, "0")}`,
+      })),
+    });
+    await create(
+      "16-mirror-cap",
+      {
+        name: "One too many",
+        dose: "1mg",
+        externalSource: "APPLE_HEALTH",
+        externalId: "hk-cap-30",
+        schedules: [schedule("08:00", "09:00")],
+      },
+      { auth: await makeSession(capped), userIds: [capped.id] },
+    );
+  });
+
+  it("17 a retried create under one idempotency key", async () => {
+    const body = {
+      name: "Retried",
+      dose: "10mg",
+      schedules: [schedule("08:00", "09:00")],
+    };
+    const headers = {
+      "idempotency-key": "6f9d2c4a-8b1e-4f3a-9d7c-5e2b1a0c9d8e",
+    };
+    await create("17a-idempotent-first", body, { headers });
+    await create("17b-idempotent-replay", body, { headers });
+  });
+
+  it("18 a delegate who may write, and one who may only read", async () => {
+    const body = {
+      name: "Brought by a delegate",
+      dose: "20mg",
+      schedules: [schedule("08:00", "09:00")],
+    };
+    await create("18a-writer", body, writer);
+    await create("18b-reader", body, reader);
+  });
+
+  it("19 no credentials", async () => {
+    await create(
+      "19-anonymous",
+      { name: "Nobody", dose: "1mg" },
+      {
+        auth: anonymous,
+      },
+    );
+  });
+});