diff --git a/apps/device-manager/server/device-manager-auth.mjs b/apps/device-manager/server/device-manager-auth.mjs
index 3b46aa2..e68cf63 100644
--- a/apps/device-manager/server/device-manager-auth.mjs
+++ b/apps/device-manager/server/device-manager-auth.mjs
@@ -8,6 +8,7 @@ export function createDeviceManagerAuth({
   env = process.env,
   fetchImpl = fetch,
   now = Date.now,
+  internalToken: providedInternalToken,
 } = {}) {
   const authRequired = booleanValue(
     env.NODEDC_DEVICE_MANAGER_AUTH_REQUIRED,
@@ -17,7 +18,9 @@ export function createDeviceManagerAuth({
   const launcherBaseUrl = baseUrl(env.NODEDC_LAUNCHER_BASE_URL, "http://127.0.0.1:5173");
   const launcherInternalUrl = baseUrl(env.NODEDC_LAUNCHER_INTERNAL_URL, launcherBaseUrl);
   const internalToken = textValue(
-    env.NODEDC_INTERNAL_ACCESS_TOKEN || env.NODEDC_PLATFORM_SERVICE_TOKEN,
+    providedInternalToken
+      || env.NODEDC_INTERNAL_ACCESS_TOKEN
+      || env.NODEDC_PLATFORM_SERVICE_TOKEN,
     "",
   );
   const sessionCookie = textValue(
@@ -66,6 +69,7 @@ export function createDeviceManagerAuth({
     sessions.set(id, {
       id,
       user: handoff.user,
+      access: handoff.access,
       launcherSessionId: handoff.launcherSessionId,
       expiresAt: createdAt + sessionTtlMs,
       validatedAt: createdAt,
@@ -116,6 +120,7 @@ export function createDeviceManagerAuth({
       }
       createSession(response, {
         user: result.body.user,
+        access: result.body.access,
         launcherSessionId: result.body.launcherSessionId ?? null,
       });
       return redirect(response, nextPath);
@@ -156,6 +161,7 @@ export function createDeviceManagerAuth({
       const { response: upstream, body } = await session.validationInFlight;
       if (upstream.ok && body?.ok === true && body.active === true) {
         session.user = body.user || session.user;
+        session.access = body.access;
         session.validatedAt = now();
         return attachSession(request, session);
       }
@@ -199,7 +205,7 @@ export function createDeviceManagerAuth({
       });
       return true;
     }
-    const access = resolveAccess(session.user);
+    const access = resolveAccess(session.user, session.access, { allowLegacy: !authRequired });
     if (!access.allowed) {
       sendJson(response, 403, {
         ok: false,
@@ -222,7 +228,9 @@ export function createDeviceManagerAuth({
 
   function currentContext(request) {
     const user = request.nodedcDeviceManagerSession?.user;
-    const access = request.nodedcDeviceManagerAccess ?? resolveAccess(user);
+    const trustedAccess = request.nodedcDeviceManagerSession?.access;
+    const access = request.nodedcDeviceManagerAccess
+      ?? resolveAccess(user, trustedAccess, { allowLegacy: !authRequired });
     if (!user || !access.allowed) return null;
     const id = cleanOpaque(user.id || user.subject || user.sub);
     if (!id) return null;
@@ -232,9 +240,6 @@ export function createDeviceManagerAuth({
       .slice(0, 240);
     const avatar = String(user.avatarUrl || user.avatar_url || user.picture || "").trim();
     const userRef = `user:${id}`;
-    const ownerScopes = ["admin", "owner"].includes(access.hubRole)
-      ? [{ scopeKind: "personal", ownerRef: userRef, displayName }]
-      : [];
     return {
       user: {
         id,
@@ -247,7 +252,7 @@ export function createDeviceManagerAuth({
         userRef,
         hubRole: access.hubRole,
         groupRefs: access.groups.map((group) => `group:${group}`),
-        ownerScopes,
+        ownerScopes: access.ownerScopes,
       },
       profileUrl: new URL("/profile", launcherBaseUrl).toString(),
     };
@@ -266,6 +271,7 @@ export function createDeviceManagerAuth({
 
   return {
     authRequired,
+    internalAccessConfigured: Boolean(internalToken),
     serviceSlug,
     authorize,
     currentContext,
@@ -274,16 +280,19 @@ export function createDeviceManagerAuth({
   };
 }
 
-function resolveAccess(user) {
+function resolveAccess(user, trustedAccess, { allowLegacy = false } = {}) {
   if (!user || typeof user !== "object") {
-    return { allowed: false, blocked: false, hubRole: "viewer", groups: [] };
+    return deniedAccess();
   }
   const groups = normalizedGroups(user);
   if (groups.includes("nodedc:device-core:blocked")) {
-    return { allowed: false, blocked: true, hubRole: "viewer", groups };
+    return { ...deniedAccess(groups), blocked: true };
   }
   const id = cleanOpaque(user.id || user.subject || user.sub);
-  if (!id) return { allowed: false, blocked: false, hubRole: "viewer", groups };
+  if (!id) return deniedAccess(groups);
+  const claims = normalizeTrustedAccess(trustedAccess, id);
+  if (claims) return { ...claims, blocked: false, groups };
+  if (!allowLegacy) return deniedAccess(groups);
   const hubRole = id === "user_root" || groups.includes("nodedc:superadmin")
     ? "owner"
     : groups.includes("nodedc:device-core:admin") || groups.includes("nodedc:launcher:admin")
@@ -291,7 +300,57 @@ function resolveAccess(user) {
       : groups.includes("nodedc:device-core:viewer")
         ? "viewer"
         : "member";
-  return { allowed: true, blocked: false, hubRole, groups };
+  const ownerScopes = ["admin", "owner"].includes(hubRole)
+    ? [{
+        scopeKind: "personal",
+        ownerRef: `user:${id}`,
+        displayName: String(user.name || user.displayName || user.email || id).trim().slice(0, 240),
+      }]
+    : [];
+  return { allowed: true, blocked: false, hubRole, groups, ownerScopes };
+}
+
+function normalizeTrustedAccess(input, userId) {
+  if (!input || typeof input !== "object" || input.allowed !== true) return null;
+  const hubRole = ["viewer", "member", "admin", "owner"].includes(input.hubRole)
+    ? input.hubRole
+    : null;
+  if (!hubRole || !Array.isArray(input.ownerScopes)) return null;
+  const ownerScopes = [];
+  for (const item of input.ownerScopes) {
+    if (!item || typeof item !== "object") return null;
+    const scopeKind = item.scopeKind === "company" || item.scopeKind === "personal"
+      ? item.scopeKind
+      : null;
+    const ownerRef = cleanOpaque(item.ownerRef);
+    const validOwner = scopeKind === "personal"
+      ? ownerRef === `user:${userId}`
+      : ownerRef?.startsWith("client:") && ownerRef.length > "client:".length;
+    if (!scopeKind || !validOwner) return null;
+    ownerScopes.push({
+      scopeKind,
+      ownerRef,
+      displayName: String(item.displayName || ownerRef).trim().slice(0, 240),
+    });
+  }
+  return {
+    allowed: true,
+    hubRole,
+    ownerScopes: [...new Map(ownerScopes.map((scope) => [
+      `${scope.scopeKind}\0${scope.ownerRef}`,
+      scope,
+    ])).values()],
+  };
+}
+
+function deniedAccess(groups = []) {
+  return {
+    allowed: false,
+    blocked: false,
+    hubRole: "viewer",
+    groups,
+    ownerScopes: [],
+  };
 }
 
 function normalizedGroups(user) {
diff --git a/apps/device-manager/server/device-manager-auth.test.mjs b/apps/device-manager/server/device-manager-auth.test.mjs
index f22434c..4ddd205 100644
--- a/apps/device-manager/server/device-manager-auth.test.mjs
+++ b/apps/device-manager/server/device-manager-auth.test.mjs
@@ -15,6 +15,22 @@ test("Launcher handoff becomes an opaque Device Manager session and trusted acto
       return jsonResponse(200, {
         ok: true,
         launcherSessionId,
+        access: {
+          allowed: true,
+          hubRole: "owner",
+          ownerScopes: [
+            {
+              scopeKind: "company",
+              ownerRef: "client:client_dctouch",
+              displayName: "DC Touch",
+            },
+            {
+              scopeKind: "personal",
+              ownerRef: "user:user_root",
+              displayName: "DC SUDO",
+            },
+          ],
+        },
         user: {
           id: "user_root",
           email: "root@example.test",
@@ -53,11 +69,18 @@ test("Launcher handoff becomes an opaque Device Manager session and trusted acto
   const context = auth.currentContext(request);
   assert.equal(context.actor.userRef, "user:user_root");
   assert.equal(context.actor.hubRole, "owner");
-  assert.deepEqual(context.actor.ownerScopes, [{
-    scopeKind: "personal",
-    ownerRef: "user:user_root",
-    displayName: "DC SUDO",
-  }]);
+  assert.deepEqual(context.actor.ownerScopes, [
+    {
+      scopeKind: "company",
+      ownerRef: "client:client_dctouch",
+      displayName: "DC Touch",
+    },
+    {
+      scopeKind: "personal",
+      ownerRef: "user:user_root",
+      displayName: "DC SUDO",
+    },
+  ]);
   assert.deepEqual(context.actor.groupRefs, [
     "group:nodedc:device-core:admin",
     "group:nodedc:superadmin",
@@ -76,6 +99,11 @@ test("invalid identity and explicit Device Core block never produce an actor", a
       fetchImpl: async () => jsonResponse(200, {
         ok: true,
         launcherSessionId,
+        access: {
+          allowed: true,
+          hubRole: "admin",
+          ownerScopes: [],
+        },
         user,
       }),
     });
@@ -97,6 +125,65 @@ test("invalid identity and explicit Device Core block never produce an actor", a
   }
 });
 
+test("production auth fails closed when Launcher omits trusted Device Core access", async () => {
+  const auth = createDeviceManagerAuth({
+    env: productionEnv(),
+    fetchImpl: async () => jsonResponse(200, {
+      ok: true,
+      launcherSessionId,
+      user: {
+        id: "user_root",
+        email: "root@example.test",
+        name: "DC SUDO",
+        groups: ["nodedc:superadmin"],
+      },
+    }),
+  });
+  const handoff = mockResponse();
+  await auth.handleHandoff(
+    { method: "GET", headers: {} },
+    handoff,
+    new URL("https://device.example.test/auth/nodedc/handoff?token=handoff-secret"),
+  );
+  const cookie = String(handoff.getHeader("set-cookie")).split(";", 1)[0];
+  const response = mockResponse();
+  assert.equal(await auth.authorize(
+    { method: "GET", headers: { cookie, accept: "application/json" } },
+    response,
+    new URL("https://device.example.test/api/device-manager/session"),
+  ), true);
+  assert.equal(response.statusCode, 403);
+  assert.equal(JSON.parse(response.body).error, "device_manager_access_denied");
+});
+
+test("an injected file-backed token takes precedence over broad platform env tokens", async () => {
+  const calls = [];
+  const auth = createDeviceManagerAuth({
+    env: { ...productionEnv(), NODEDC_INTERNAL_ACCESS_TOKEN: "broad-platform-token" },
+    internalToken: "scoped-file-token",
+    fetchImpl: async (url, init) => {
+      calls.push({ url, init });
+      return jsonResponse(200, {
+        ok: true,
+        launcherSessionId,
+        access: { allowed: true, hubRole: "member", ownerScopes: [] },
+        user: {
+          id: "device-member",
+          email: "member@example.test",
+          name: "Device Member",
+          groups: ["nodedc:device-core:access"],
+        },
+      });
+    },
+  });
+  await auth.handleHandoff(
+    { method: "GET", headers: {} },
+    mockResponse(),
+    new URL("https://device.example.test/auth/nodedc/handoff?token=handoff-secret"),
+  );
+  assert.equal(calls[0].init.headers.Authorization, "Bearer scoped-file-token");
+});
+
 function productionEnv() {
   return {
     NODE_ENV: "production",
diff --git a/apps/device-manager/server/device-manager-server.mjs b/apps/device-manager/server/device-manager-server.mjs
index 4d46fb6..9b96aa4 100644
--- a/apps/device-manager/server/device-manager-server.mjs
+++ b/apps/device-manager/server/device-manager-server.mjs
@@ -123,7 +123,14 @@ export function createDeviceManagerServer({
 
 export async function createConfiguredDeviceManagerServer({ env = process.env } = {}) {
   const localPreview = booleanValue(env.NODEDC_DEVICE_MANAGER_LOCAL_PREVIEW, false);
-  const auth = createDeviceManagerAuth({ env });
+  const launcherTokenFile = String(env.NODEDC_LAUNCHER_INTERNAL_TOKEN_FILE || "").trim();
+  const launcherInternalToken = launcherTokenFile
+    ? (await readFile(launcherTokenFile, "utf8")).trim()
+    : undefined;
+  const auth = createDeviceManagerAuth({ env, internalToken: launcherInternalToken });
+  if (auth.authRequired && !auth.internalAccessConfigured) {
+    throw new Error("device_manager_auth_token_file_required");
+  }
   let coreClient;
   if (localPreview) {
     if (String(env.NODE_ENV || "").toLowerCase() === "production") {