diff --git a/CHANGELOG.md b/CHANGELOG.md
index 265b8cc..07547d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,21 @@ as the sole owner of their own account and sees identical data.
 - **The signup trigger (`handle_new_user`) now also creates a
   personal account** and links the new profile to it as `owner`.
 
+### Changed
+
+- **Role-aware UI gating across the app.** The inbox composer's
+  send button + textarea, the "New broadcast / automation / flow"
+  buttons, the "Add pipeline / deal" buttons, and the "Add /
+  Import contact" buttons are now disabled-with-tooltip for
+  viewers (and for agents on settings-class actions). Choice:
+  show-but-disable rather than hide, so the UI never feels
+  silently broken to a teammate looking at a feature they don't
+  yet have permission for.
+- **Sidebar surfaces the active account** above the user info
+  when the `account_sharing` beta flag is on. Solo users keep
+  the original layout (their account is named after them, so
+  duplicating it would just add visual noise).
+
 ### Fixed
 
 - **Inbound WhatsApp messages now land in the shared inbox.** The
diff --git a/src/app/(dashboard)/automations/page.tsx b/src/app/(dashboard)/automations/page.tsx
index dadead5..ed861d3 100644
--- a/src/app/(dashboard)/automations/page.tsx
+++ b/src/app/(dashboard)/automations/page.tsx
@@ -19,6 +19,7 @@ import {
 } from "lucide-react"
 
 import { createClient } from "@/lib/supabase/client"
+import { useCan } from "@/hooks/use-can"
 import type { Automation } from "@/types"
 import { Button } from "@/components/ui/button"
 import { Switch } from "@/components/ui/switch"
@@ -55,8 +56,12 @@ const TEMPLATE_ICON: Record<TemplateSlug, typeof Zap> = {
   follow_up_reminder: PhoneCall,
 }
 
+const READ_ONLY_TITLE =
+  "Read-only — your role can't create automations"
+
 export default function AutomationsPage() {
   const router = useRouter()
+  const canCreate = useCan("send-messages")
   const [automations, setAutomations] = useState<Automation[] | null>(null)
   const [error, setError] = useState<string | null>(null)
   const [pendingDelete, setPendingDelete] = useState<Automation | null>(null)
@@ -164,6 +169,8 @@ export default function AutomationsPage() {
         </div>
         <Button
           onClick={() => router.push("/automations/new")}
+          disabled={!canCreate}
+          title={canCreate ? undefined : READ_ONLY_TITLE}
           className="bg-primary text-primary-foreground hover:bg-primary/90"
         >
           <Plus className="h-4 w-4" />
diff --git a/src/app/(dashboard)/broadcasts/page.tsx b/src/app/(dashboard)/broadcasts/page.tsx
index a98f3d6..0b8ca47 100644
--- a/src/app/(dashboard)/broadcasts/page.tsx
+++ b/src/app/(dashboard)/broadcasts/page.tsx
@@ -14,8 +14,15 @@ import {
   TableRow,
 } from '@/components/ui/table';
 import { Radio, Plus, Loader2 } from 'lucide-react';
+import { useCan } from '@/hooks/use-can';
 import { getBroadcastStatus } from '@/lib/broadcast-status';
 
+// Tooltip copy reused across both "New broadcast" buttons on this
+// page. Centralised so a wording change is a one-line diff and the
+// two CTAs can't drift apart.
+const READ_ONLY_TITLE =
+  "Read-only — your role can't create broadcasts";
+
 /**
  * Poll cadence while any broadcast is sending. Kept modest so we don't
  * beat on Supabase — the aggregate trigger in migration 003 keeps
@@ -56,6 +63,7 @@ function RateCell({
 
 export default function BroadcastsPage() {
   const router = useRouter();
+  const canCreate = useCan('send-messages');
   const [broadcasts, setBroadcasts] = useState<Broadcast[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
@@ -183,6 +191,8 @@ export default function BroadcastsPage() {
         </div>
         <Button
           onClick={() => router.push('/broadcasts/new')}
+          disabled={!canCreate}
+          title={canCreate ? undefined : READ_ONLY_TITLE}
           className="bg-primary text-primary-foreground hover:bg-primary/90"
         >
           <Plus className="h-4 w-4" />
@@ -199,6 +209,8 @@ export default function BroadcastsPage() {
           </p>
           <Button
             onClick={() => router.push('/broadcasts/new')}
+            disabled={!canCreate}
+            title={canCreate ? undefined : READ_ONLY_TITLE}
             className="mt-4 bg-primary text-primary-foreground hover:bg-primary/90"
           >
             <Plus className="h-4 w-4" />
diff --git a/src/app/(dashboard)/contacts/page.tsx b/src/app/(dashboard)/contacts/page.tsx
index 6ae6168..08e4640 100644
--- a/src/app/(dashboard)/contacts/page.tsx
+++ b/src/app/(dashboard)/contacts/page.tsx
@@ -44,8 +44,11 @@ import {
 import { ContactForm } from '@/components/contacts/contact-form';
 import { ContactDetailView } from '@/components/contacts/contact-detail-view';
 import { ImportModal } from '@/components/contacts/import-modal';
+import { useCan } from '@/hooks/use-can';
 
 const PAGE_SIZE = 25;
+const READ_ONLY_TITLE =
+  "Read-only — your role can't add or import contacts";
 
 interface ContactWithTags extends Contact {
   tags?: Tag[];
@@ -53,6 +56,7 @@ interface ContactWithTags extends Contact {
 
 export default function ContactsPage() {
   const supabase = createClient();
+  const canEdit = useCan('send-messages');
 
   const [contacts, setContacts] = useState<ContactWithTags[]>([]);
   const [loading, setLoading] = useState(true);
@@ -219,6 +223,8 @@ export default function ContactsPage() {
           <Button
             variant="outline"
             onClick={() => setImportOpen(true)}
+            disabled={!canEdit}
+            title={canEdit ? undefined : READ_ONLY_TITLE}
             className="border-slate-700 text-slate-300 hover:bg-slate-800"
           >
             <Upload className="size-4" />
@@ -226,6 +232,8 @@ export default function ContactsPage() {
           </Button>
           <Button
             onClick={openAddForm}
+            disabled={!canEdit}
+            title={canEdit ? undefined : READ_ONLY_TITLE}
             className="bg-primary hover:bg-primary/90 text-primary-foreground"
           >
             <Plus className="size-4" />
diff --git a/src/app/(dashboard)/flows/page.tsx b/src/app/(dashboard)/flows/page.tsx
index 40d891b..c865a69 100644
--- a/src/app/(dashboard)/flows/page.tsx
+++ b/src/app/(dashboard)/flows/page.tsx
@@ -18,6 +18,7 @@ import {
   FileText,
 } from "lucide-react";
 
+import { useCan } from "@/hooks/use-can";
 import { Button } from "@/components/ui/button";
 import {
   Dialog,
@@ -79,8 +80,11 @@ const TEMPLATE_ICONS = {
   UserPlus,
 } as const;
 
+const READ_ONLY_TITLE = "Read-only — your role can't create flows";
+
 export default function FlowsPage() {
   const router = useRouter();
+  const canCreate = useCan("send-messages");
   const [flows, setFlows] = useState<FlowRow[]>([]);
   const [loading, setLoading] = useState(true);
   const [createOpen, setCreateOpen] = useState(false);
@@ -211,14 +215,21 @@ export default function FlowsPage() {
             menus, FAQs, and triage before a human steps in.
           </p>
         </div>
-        <Button onClick={() => setCreateOpen(true)}>
+        <Button
+          onClick={() => setCreateOpen(true)}
+          disabled={!canCreate}
+          title={canCreate ? undefined : READ_ONLY_TITLE}
+        >
           <Plus className="h-4 w-4" />
           New flow
         </Button>
       </header>
 
       {flows.length === 0 ? (
-        <EmptyState onCreate={() => setCreateOpen(true)} />
+        <EmptyState
+          onCreate={() => setCreateOpen(true)}
+          canCreate={canCreate}
+        />
       ) : (
         <div className="grid grid-cols-1 gap-4 md:grid-cols-2 xl:grid-cols-3">
           {flows.map((flow) => (
@@ -312,7 +323,13 @@ export default function FlowsPage() {
   );
 }
 
-function EmptyState({ onCreate }: { onCreate: () => void }) {
+function EmptyState({
+  onCreate,
+  canCreate,
+}: {
+  onCreate: () => void;
+  canCreate: boolean;
+}) {
   return (
     <div className="flex flex-col items-center justify-center rounded-lg border border-dashed border-slate-700 bg-slate-900/50 px-6 py-16 text-center">
       <div className="flex h-14 w-14 items-center justify-center rounded-full bg-slate-800">
@@ -326,7 +343,12 @@ function EmptyState({ onCreate }: { onCreate: () => void }) {
         bot. Customers tap buttons; the bot routes them to the right answer (or
         the right agent).
       </p>
-      <Button onClick={onCreate} className="mt-5">
+      <Button
+        onClick={onCreate}
+        disabled={!canCreate}
+        title={canCreate ? undefined : READ_ONLY_TITLE}
+        className="mt-5"
+      >
         <Plus className="h-4 w-4" />
         Create your first flow
       </Button>
diff --git a/src/app/(dashboard)/pipelines/page.tsx b/src/app/(dashboard)/pipelines/page.tsx
index 7d0a539..24a95e2 100644
--- a/src/app/(dashboard)/pipelines/page.tsx
+++ b/src/app/(dashboard)/pipelines/page.tsx
@@ -26,6 +26,14 @@ import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { GitBranch, Plus, ChevronDown, Settings } from "lucide-react";
 import { toast } from "sonner";
+import { useCan } from "@/hooks/use-can";
+
+// Pipeline creation is admin-class (it's a settings-tier write
+// under the new RLS), but deal creation is operational and only
+// requires agent+. The two CTAs gate on different capabilities.
+const PIPELINE_READ_ONLY_TITLE =
+  "Read-only — your role can't create pipelines";
+const DEAL_READ_ONLY_TITLE = "Read-only — your role can't create deals";
 
 // Spec-defined seed — name and color per the product spec.
 const SPEC_DEFAULT_STAGES = [
@@ -38,6 +46,8 @@ const SPEC_DEFAULT_STAGES = [
 
 export default function PipelinesPage() {
   const supabase = createClient();
+  const canEditSettings = useCan("edit-settings");
+  const canCreateDeals = useCan("send-messages");
 
   const [pipelines, setPipelines] = useState<Pipeline[]>([]);
   const [selectedPipelineId, setSelectedPipelineId] = useState<string>("");
@@ -349,6 +359,8 @@ export default function PipelinesPage() {
           <Button
             variant="outline"
             onClick={() => setNewPipelineOpen(true)}
+            disabled={!canEditSettings}
+            title={canEditSettings ? undefined : PIPELINE_READ_ONLY_TITLE}
             className="border-slate-700 bg-slate-900 text-slate-200 hover:bg-slate-800"
           >
             <Plus className="mr-1 h-4 w-4" />
@@ -356,7 +368,10 @@ export default function PipelinesPage() {
           </Button>
           <Button
             onClick={() => handleAddDeal()}
-            disabled={!selectedPipelineId || stages.length === 0}
+            disabled={
+              !canCreateDeals || !selectedPipelineId || stages.length === 0
+            }
+            title={canCreateDeals ? undefined : DEAL_READ_ONLY_TITLE}
             className="bg-primary text-primary-foreground hover:bg-primary/90"
           >
             <Plus className="mr-1 h-4 w-4" />
@@ -377,6 +392,8 @@ export default function PipelinesPage() {
           </p>
           <Button
             onClick={() => setNewPipelineOpen(true)}
+            disabled={!canEditSettings}
+            title={canEditSettings ? undefined : PIPELINE_READ_ONLY_TITLE}
             className="mt-4 bg-primary text-primary-foreground hover:bg-primary/90"
           >
             <Plus className="mr-1 h-4 w-4" />
diff --git a/src/components/inbox/message-composer.tsx b/src/components/inbox/message-composer.tsx
index 06de109..385c64e 100644
--- a/src/components/inbox/message-composer.tsx
+++ b/src/components/inbox/message-composer.tsx
@@ -3,6 +3,7 @@
 import { useState, useRef, useCallback, KeyboardEvent } from "react";
 import { Send, LayoutTemplate } from "lucide-react";
 import { Button } from "@/components/ui/button";
+import { useCan } from "@/hooks/use-can";
 import { cn } from "@/lib/utils";
 import { ReplyQuote } from "./reply-quote";
 
@@ -33,6 +34,11 @@ export function MessageComposer({
   const [text, setText] = useState("");
   const [sending, setSending] = useState(false);
   const textareaRef = useRef<HTMLTextAreaElement>(null);
+  // Viewers (read-only role) can browse the inbox but never send.
+  // For solo users this is always true — single-owner accounts pass
+  // every capability — so the disabled branch is a no-op there.
+  const canSend = useCan("send-messages");
+  const readOnly = !canSend;
 
   const adjustHeight = useCallback(() => {
     const el = textareaRef.current;
@@ -110,7 +116,8 @@ export function MessageComposer({
           size="sm"
           className="h-9 w-9 shrink-0 p-0 text-slate-400 hover:text-white"
           onClick={onOpenTemplates}
-          title="Send template"
+          disabled={readOnly}
+          title={readOnly ? "Read-only — your role can't send messages" : "Send template"}
         >
           <LayoutTemplate className="h-4 w-4" />
         </Button>
@@ -121,23 +128,27 @@ export function MessageComposer({
           onChange={handleChange}
           onKeyDown={handleKeyDown}
           placeholder={
-            sessionExpired
-              ? "Session expired - use a template"
-              : "Type a message... (Shift+Enter for new line)"
+            readOnly
+              ? "Read-only — viewers can browse but not reply"
+              : sessionExpired
+                ? "Session expired - use a template"
+                : "Type a message... (Shift+Enter for new line)"
           }
-          disabled={sessionExpired}
+          disabled={sessionExpired || readOnly}
           rows={1}
+          title={readOnly ? "Read-only — your role can't send messages" : undefined}
           className={cn(
             "flex-1 resize-none rounded-xl border border-slate-700 bg-slate-800 px-4 py-2.5 text-sm text-white placeholder-slate-500 outline-none transition-colors focus:border-primary/50",
-            sessionExpired && "cursor-not-allowed opacity-50"
+            (sessionExpired || readOnly) && "cursor-not-allowed opacity-50"
           )}
         />
 
         <Button
           size="sm"
           className="h-9 w-9 shrink-0 bg-primary p-0 hover:bg-primary/90 disabled:opacity-40"
-          disabled={!text.trim() || sessionExpired || sending}
+          disabled={!text.trim() || sessionExpired || sending || readOnly}
           onClick={handleSend}
+          title={readOnly ? "Read-only — your role can't send messages" : undefined}
         >
           <Send className="h-4 w-4" />
         </Button>
diff --git a/src/components/layout/sidebar.tsx b/src/components/layout/sidebar.tsx
index d550745..316d4bd 100644
--- a/src/components/layout/sidebar.tsx
+++ b/src/components/layout/sidebar.tsx
@@ -17,6 +17,7 @@ import {
   Settings,
   LogOut,
   User,
+  UsersRound,
   X,
 } from "lucide-react";
 import {
@@ -63,10 +64,17 @@ interface SidebarProps {
   onClose?: () => void;
 }
 
+// Same flag key the Members tab and Settings page use. Flip per
+// profile via Supabase Studio to dogfood the multi-user surface.
+const ACCOUNT_SHARING_FLAG = "account_sharing";
+
 export function Sidebar({ open = false, onClose }: SidebarProps) {
   const pathname = usePathname();
-  const { profile, signOut } = useAuth();
+  const { profile, account, accountRole, signOut } = useAuth();
   const totalUnread = useTotalUnread();
+  const accountSharingEnabled = !!profile?.beta_features?.includes(
+    ACCOUNT_SHARING_FLAG,
+  );
 
   // Close the drawer when route changes — users opened it to navigate,
   // so once they pick a destination the drawer should get out of the way.
@@ -216,6 +224,23 @@ export function Sidebar({ open = false, onClose }: SidebarProps) {
 
         {/* User section */}
         <div className="shrink-0 border-t border-slate-800 p-3">
+          {/* Account name display — only surfaced when the user is
+              opted into the account_sharing beta flag. For solo
+              users (the default) the account is named after them,
+              so showing it here would just duplicate the user name
+              below. Once the flag is on the user is at minimum
+              aware of which shared account they're acting in. */}
+          {accountSharingEnabled && account?.name ? (
+            <div className="mb-2 flex items-center gap-2 px-3 text-xs text-slate-500">
+              <UsersRound className="size-3.5" />
+              <span className="truncate">{account.name}</span>
+              {accountRole && accountRole !== "owner" ? (
+                <span className="ml-auto rounded-full border border-slate-700 bg-slate-800 px-1.5 py-0.5 text-[10px] uppercase tracking-wider text-slate-400">
+                  {accountRole}
+                </span>
+              ) : null}
+            </div>
+          ) : null}
           <DropdownMenu>
             <DropdownMenuTrigger className="flex w-full items-center gap-3 rounded-lg px-3 py-2 text-left transition-colors hover:bg-slate-800/60 focus:bg-slate-800/60 focus:outline-none data-popup-open:bg-slate-800/60">
               <Avatar className="size-8 shrink-0">