diff --git a/apps/message-demo/package.json b/apps/message-demo/package.json
index 437b8ab..a9099ba 100644
--- a/apps/message-demo/package.json
+++ b/apps/message-demo/package.json
@@ -10,6 +10,7 @@
   "dependencies": {
     "@insignia/iios-kernel-client": "workspace:*",
     "@insignia/iios-message-web": "workspace:*",
+    "@insignia/iios-inbox-web": "workspace:*",
     "react": "^19.0.0",
     "react-dom": "^19.0.0"
   },
diff --git a/apps/message-demo/src/App.tsx b/apps/message-demo/src/App.tsx
index 13a1472..65569b6 100644
--- a/apps/message-demo/src/App.tsx
+++ b/apps/message-demo/src/App.tsx
@@ -1,5 +1,6 @@
 import { useEffect, useState } from 'react';
 import { MessageProvider, useThread, useMessages } from '@insignia/iios-message-web';
+import { InboxProvider, useInbox } from '@insignia/iios-inbox-web';
 
 const SERVICE = 'http://localhost:3200';
 const APP_ID = 'portal-demo';
@@ -83,12 +84,35 @@ function ChatInner({
   );
 }
 
+function InboxSidebar() {
+  const { items, done, snooze } = useInbox({ state: 'OPEN' });
+  return (
+    <div style={{ width: 170, borderRight: '1px solid #ddd', padding: 8, fontSize: 12, fontFamily: 'sans-serif' }}>
+      <b>Inbox ({items.length})</b>
+      {items.length === 0 && <div style={{ color: '#999', marginTop: 6 }}>nothing to reply to</div>}
+      {items.map((i) => (
+        <div key={i.id} style={{ padding: '6px 0', borderBottom: '1px solid #eee' }}>
+          <div style={{ fontWeight: 600 }}>{i.title}</div>
+          <div style={{ color: '#999' }}>{i.kind}</div>
+          <button style={{ marginRight: 4 }} onClick={() => void done(i.id)}>done</button>
+          <button onClick={() => void snooze(i.id)}>snooze</button>
+        </div>
+      ))}
+    </div>
+  );
+}
+
 function Pane(props: { token: string | null; label: string; threadId: string | null; onCreated?: (id: string) => void }) {
   if (!props.token) return <div style={{ flex: 1, margin: 8 }}>loading {props.label}…</div>;
   return (
-    <MessageProvider serviceUrl={SERVICE} token={props.token}>
-      <ChatInner label={props.label} threadId={props.threadId} onCreated={props.onCreated} />
-    </MessageProvider>
+    <div style={{ flex: 1, display: 'flex', margin: 8, border: '1px solid #ccc', borderRadius: 8, overflow: 'hidden' }}>
+      <InboxProvider serviceUrl={SERVICE} token={props.token}>
+        <InboxSidebar />
+      </InboxProvider>
+      <MessageProvider serviceUrl={SERVICE} token={props.token}>
+        <ChatInner label={props.label} threadId={props.threadId} onCreated={props.onCreated} />
+      </MessageProvider>
+    </div>
   );
 }
 
diff --git a/packages/iios-service/scripts/smoke-inbox.mjs b/packages/iios-service/scripts/smoke-inbox.mjs
new file mode 100644
index 0000000..384711a
--- /dev/null
+++ b/packages/iios-service/scripts/smoke-inbox.mjs
@@ -0,0 +1,65 @@
+// P3 inbox smoke: Alice sends → Bob's inbox gets a NEEDS_REPLY item → Bob reads
+// → item auto-resolves to DONE. Requires the service running (relay timer on),
+// IIOS_DEV_TOKENS not needed (we sign locally). Run: node scripts/smoke-inbox.mjs
+import 'dotenv/config';
+import { io } from 'socket.io-client';
+import jwt from 'jsonwebtoken';
+
+const SERVICE = process.env.SMOKE_URL ?? 'http://localhost:3200';
+const APP_ID = 'portal-demo';
+const SECRET = JSON.parse(process.env.APP_SECRETS ?? '{"portal-demo":"dev-secret"}')[APP_ID];
+
+const sign = (u) => jwt.sign({ sub: u, name: u, appId: APP_ID, orgId: `org_${APP_ID}` }, SECRET, { algorithm: 'HS256', expiresIn: '1h' });
+const connect = (u) => io(`${SERVICE}/message`, { auth: { token: sign(u) }, transports: ['websocket'], forceNew: true });
+const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
+const assert = (c, m) => {
+  if (!c) { console.error('✗', m); process.exit(1); }
+  console.log('✓', m);
+};
+
+async function inbox(token, state) {
+  const r = await fetch(`${SERVICE}/v1/inbox/items${state ? `?state=${state}` : ''}`, {
+    headers: { authorization: `Bearer ${token}` },
+  });
+  if (!r.ok) throw new Error(`inbox ${r.status}`);
+  return r.json();
+}
+async function pollUntil(fn, ms = 8000) {
+  const end = Date.now() + ms;
+  while (Date.now() < end) {
+    const v = await fn();
+    if (v) return v;
+    await sleep(300);
+  }
+  return null;
+}
+
+const bobToken = sign('bob');
+const alice = connect('alice');
+const bob = connect('bob');
+
+try {
+  const { threadId } = await alice.emitWithAck('open_thread', {});
+  await bob.emitWithAck('open_thread', { threadId }); // Bob joins → participant
+  const sent = await alice.emitWithAck('send_message', { threadId, content: 'hi bob' });
+
+  const open = await pollUntil(async () => {
+    const items = await inbox(bobToken, 'OPEN');
+    return items.find((i) => i.threadId === threadId && i.kind === 'NEEDS_REPLY') ?? null;
+  });
+  assert(open, `Bob's inbox got an OPEN NEEDS_REPLY item (${open?.id})`);
+
+  await bob.emitWithAck('read', { threadId, interactionId: sent.id });
+  const done = await pollUntil(async () => {
+    const items = await inbox(bobToken);
+    const it = items.find((i) => i.id === open.id);
+    return it && it.state === 'DONE' ? it : null;
+  });
+  assert(done, "Bob's item auto-resolved to DONE after reading");
+
+  console.log('\nP3 inbox smoke: PASS');
+} finally {
+  alice.close();
+  bob.close();
+}
+process.exit(0);
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 9182184..134f9fb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -20,6 +20,9 @@ importers:
 
   apps/message-demo:
     dependencies:
+      '@insignia/iios-inbox-web':
+        specifier: workspace:*
+        version: link:../../packages/iios-inbox-web
       '@insignia/iios-kernel-client':
         specifier: workspace:*
         version: link:../../packages/iios-kernel-client