diff --git a/packages/core/src/devices/relationship-http.ts b/packages/core/src/devices/relationship-http.ts
index dca453fac..757b53989 100644
--- a/packages/core/src/devices/relationship-http.ts
+++ b/packages/core/src/devices/relationship-http.ts
@@ -20,6 +20,10 @@ const command = z.discriminatedUnion('action', [
   z.object({ action: z.literal('cancel'), id, confirm: z.literal(true) }),
 ]);
 
+export const RELATIONSHIP_ACTIONS: readonly string[] = command.options.map(
+  (option) => option.shape.action.value,
+);
+
 export function createRelationshipHttp(control: RelationshipControl) {
   return async (request: Request): Promise<Response> => {
     const reply = (body: unknown, status = 200) =>
diff --git a/packages/core/test/device-gateway.test.ts b/packages/core/test/device-gateway.test.ts
index fc97c653f..0bca33d0b 100644
--- a/packages/core/test/device-gateway.test.ts
+++ b/packages/core/test/device-gateway.test.ts
@@ -52,6 +52,7 @@ async function fakeDsh(
     token: 'launch-token',
     seen: [] as Record<string, unknown>[],
     upgrades: [] as string[],
+    mints: 0,
   };
   const cookie = () => `dsh=${String(state.secret)}`;
   let gateway: ReturnType<typeof createDeviceGateway> | undefined;
@@ -59,6 +60,7 @@ async function fakeDsh(
     const url = new URL(req.url ?? '/', 'http://x');
     if (url.pathname.startsWith(DEVICE_GATEWAY_PREFIX)) return void gateway!.handle(req, res);
     if (url.pathname === '/' && url.searchParams.get('token') === state.token) {
+      state.mints++;
       res.writeHead(303, { 'set-cookie': `${cookie()}; HttpOnly`, location: '/' });
       return res.end();
     }
@@ -317,6 +319,54 @@ it('does not let a paired device manage or inherit Host relationships', async ()
   expect(host.pairing.admit(`Device ${paired.credential}`).ok).toBe(true);
 });
 
+it('never uses the Owner session for a grant that is not bound to the current Owner', async () => {
+  let ownerHumanId = OWNER_HUMAN_CONTEXT.humanId;
+  const host = await fakeDsh(
+    undefined,
+    undefined,
+    undefined,
+    undefined,
+    undefined,
+    () => ownerHumanId,
+  );
+  const paired = await pair(host.base, host.pairing.createOffer().offer);
+  const authorization = `Device ${paired.body.credential}`;
+  const ticket = (await (
+    await fetch(`${host.base}/botharness-device/stream-ticket`, {
+      method: 'POST',
+      headers: { authorization },
+    })
+  ).json()) as { ticket: string };
+  ownerHumanId = 'not-the-owner';
+  const refused = { code: 'device-revoked' };
+  const unary = await fetch(`${host.base}/botharness-device/api/botharness/list`, {
+    method: 'POST',
+    headers: { authorization, 'content-type': 'application/json' },
+    body: '{"type":"client-request"}',
+  });
+  expect([unary.status, await unary.json()]).toEqual([401, refused]);
+  const avatar = await fetch(
+    `${host.base}/botharness-device/api/botharness/bot-avatar?slug=ada&v=portrait-1`,
+    { headers: { authorization } },
+  );
+  expect([avatar.status, await avatar.json()]).toEqual([401, refused]);
+  const issued = await fetch(`${host.base}/botharness-device/stream-ticket`, {
+    method: 'POST',
+    headers: { authorization },
+  });
+  expect([issued.status, await issued.json()]).toEqual([401, refused]);
+  expect(await stream(host.port, { authorization })).toEqual({
+    status: 401,
+    body: JSON.stringify(refused),
+  });
+  expect(
+    await stream(host.port, {}, `/botharness-device/api/remote.mux?ticket=${ticket.ticket}`),
+  ).toEqual({ status: 401, body: JSON.stringify(refused) });
+  expect(host.state.mints).toBe(0);
+  expect(host.state.seen).toEqual([]);
+  expect(host.state.upgrades).toEqual([]);
+});
+
 it('attributes Feed acknowledgement to the authenticated device and refuses revoked or missing credentials', async () => {
   const host = await fakeDsh();
   const paired = host.pairing.redeem({ offer: host.pairing.createOffer().offer });
diff --git a/packages/core/test/team-mode.test.ts b/packages/core/test/team-mode.test.ts
index d058817b8..3cff35f69 100644
--- a/packages/core/test/team-mode.test.ts
+++ b/packages/core/test/team-mode.test.ts
@@ -4,6 +4,7 @@ import { createAttachmentStore } from '../src/attachments/store.js';
 import { DatabaseSync } from 'node:sqlite';
 import { BOT_HARNESS_SCHEMA_PLAN } from '../src/database/schema-plan.js';
 import { createDevicePairing } from '../src/devices/pairing.js';
+import { RELATIONSHIP_ACTIONS } from '../src/devices/relationship-http.js';
 import { createServer, IncomingMessage, request as httpRequest } from 'node:http';
 import { Socket } from 'node:net';
 import { readFileSync } from 'node:fs';
@@ -1185,7 +1186,10 @@ describe('member HTTP carrier', { timeout: 60_000 }, () => {
       const http = await memberHttp(f);
       const cookie =
         (await http.signIn('bob', 'member-password-1')).headers.get('set-cookie') ?? '';
-      for (const action of ['list', 'initiate', 'approve', 'sync', 'enroll', 'disconnect']) {
+      expect(RELATIONSHIP_ACTIONS).toEqual(
+        expect.arrayContaining(['initiate', 'approve', 'enroll', 'disconnect']),
+      );
+      for (const action of ['list', ...RELATIONSHIP_ACTIONS]) {
         const response = await fetch(`${http.origin}${TEAM_PATH}/api/botharness/relationships`, {
           method: action === 'list' ? 'GET' : 'POST',
           headers: { cookie, 'content-type': 'application/json' },