diff --git a/src/app/api/allergies/route.ts b/src/app/api/allergies/route.ts
index 8ae18805b..f29719ded 100644
--- a/src/app/api/allergies/route.ts
+++ b/src/app/api/allergies/route.ts
@@ -11,7 +11,7 @@
 import { NextRequest } from "next/server";
 
 import { prisma } from "@/lib/db";
-import { apiHandler, requireAuth, requireRecordAuth } from "@/lib/api-handler";
+import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
 import {
@@ -67,7 +67,10 @@ export const GET = apiHandler(async (request: NextRequest) => {
 export const POST = apiHandler(withIdempotency<[NextRequest]>(postAllergy));
 
 async function postAllergy(request: NextRequest): Promise<Response> {
-  const { user } = await requireAuth();
+  // v1.36.x — a delegated write, and the cleanest of them: the row is a plain
+  // statement about the record's own body, and the caller appears in the audit
+  // trail rather than in the row.
+  const { user } = await requireRecordAuth("write");
 
   const { data: rawBody, error: jsonError } = await safeJson(request, {
     maxBytes: 16 * 1024,
diff --git a/src/app/api/custom-metrics/[id]/entries/route.ts b/src/app/api/custom-metrics/[id]/entries/route.ts
index b6963086c..dd9d45344 100644
--- a/src/app/api/custom-metrics/[id]/entries/route.ts
+++ b/src/app/api/custom-metrics/[id]/entries/route.ts
@@ -1,6 +1,6 @@
 import { NextRequest } from "next/server";
 
-import { apiHandler, requireAuth, requireRecordAuth } from "@/lib/api-handler";
+import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import {
   apiError,
   apiSuccess,
@@ -89,7 +89,11 @@ async function postCustomMetricEntry(
   request: NextRequest,
   { params }: RouteParams,
 ) {
-  const { user } = await requireAuth();
+  // v1.36.x — a delegated write. The ownership hop runs first and now resolves
+  // against the record, so a delegate can only add a value to a metric the
+  // OWNER defined; their own metric of the same name is unreachable from in
+  // here and 404s.
+  const { user } = await requireRecordAuth("write");
   const { id } = await params;
 
   const metric = await prisma.customMetric.findFirst({
@@ -114,17 +118,13 @@ async function postCustomMetricEntry(
     const auditIssues = sanitiseZodIssues(parsed.error.issues, {
       stripValuesFromMessage: true,
     });
-    prisma.auditLog
-      .create({
-        data: {
-          userId: user.id,
-          action: "custom-metric.entry.create.validation-failed",
-          details: JSON.stringify({ issues: auditIssues, customMetricId: id }),
-        },
-      })
-      .catch(() => {
-        /* swallow — the 422 response is the contract */
-      });
+    // v1.36.x — through `auditLog()`, the only writer that stamps the actor.
+    void auditLog("custom-metric.entry.create.validation-failed", {
+      userId: user.id,
+      details: { issues: auditIssues, customMetricId: id },
+    }).catch(() => {
+      /* swallow — the 422 response is the contract */
+    });
     return returnAllZodIssues(parsed.error, 422);
   }
 
diff --git a/src/app/api/family-history/route.ts b/src/app/api/family-history/route.ts
index d58cb44d4..d560de87e 100644
--- a/src/app/api/family-history/route.ts
+++ b/src/app/api/family-history/route.ts
@@ -12,7 +12,7 @@
 import { NextRequest } from "next/server";
 
 import { prisma } from "@/lib/db";
-import { apiHandler, requireAuth, requireRecordAuth } from "@/lib/api-handler";
+import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
 import {
@@ -62,7 +62,11 @@ export const POST = apiHandler(
 );
 
 async function postFamilyHistory(request: NextRequest): Promise<Response> {
-  const { user } = await requireAuth();
+  // v1.36.x — a delegated write, and the one where third-party health data is
+  // present by design: the row describes the record's relatives. It is stored
+  // as the record's own, exactly as the delegable READ arm above already
+  // serves it, and the audit trail names who entered it.
+  const { user } = await requireRecordAuth("write");
 
   const { data: rawBody, error: jsonError } = await safeJson(request, {
     maxBytes: 16 * 1024,
diff --git a/src/app/api/illness/episodes/route.ts b/src/app/api/illness/episodes/route.ts
index a4a0d0d11..fcb41029c 100644
--- a/src/app/api/illness/episodes/route.ts
+++ b/src/app/api/illness/episodes/route.ts
@@ -13,7 +13,7 @@
 import { NextRequest } from "next/server";
 
 import { prisma } from "@/lib/db";
-import { apiHandler, requireAuth, requireRecordAuth } from "@/lib/api-handler";
+import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
 import {
@@ -74,7 +74,11 @@ export const GET = apiHandler(async (request: NextRequest) => {
 export const POST = apiHandler(withIdempotency<[NextRequest]>(postEpisode));
 
 async function postEpisode(request: NextRequest): Promise<Response> {
-  const { user } = await requireAuth();
+  // v1.36.x — a delegated write. The module gate below follows the RECORD, not
+  // the caller: whether illness tracking exists is a property of the record, so
+  // a delegate who runs the module on their own account does not thereby gain
+  // an episode surface inside somebody else's.
+  const { user } = await requireRecordAuth("write");
 
   const gate = await requireIllnessEnabled(user.id);
   if (!gate.enabled) return gate.response;