diff --git a/apps/web/src/lib/title.ts b/apps/web/src/lib/title.ts
new file mode 100644
index 0000000..ee06f7c
--- /dev/null
+++ b/apps/web/src/lib/title.ts
@@ -0,0 +1,18 @@
+/**
+ * Per-route document titles.
+ *
+ * A single static title makes browser history and a wall of open tabs useless
+ * — every entry reads "pig" and nobody can tell the margin view from the
+ * pipeline. The page name leads, because that is the part a tab strip has room
+ * to show before truncating.
+ */
+import { useEffect } from 'react';
+
+export function usePageTitle(title?: string): void {
+  useEffect(() => {
+    document.title = title ? `${title} · pig` : 'pig — Prime Intellect Growth';
+    return () => {
+      document.title = 'pig — Prime Intellect Growth';
+    };
+  }, [title]);
+}
diff --git a/apps/web/src/pages/Accounts.tsx b/apps/web/src/pages/Accounts.tsx
index 033ea02..eaa869f 100644
--- a/apps/web/src/pages/Accounts.tsx
+++ b/apps/web/src/pages/Accounts.tsx
@@ -6,6 +6,7 @@ import { useQuery } from '@tanstack/react-query';
 import { Building2 } from 'lucide-react';
 import { get, relativeTime } from '@/lib/api';
 import { Badge, ConfidenceBadge, EmptyState, Input, Skeleton } from '@/components/ui';
+import { usePageTitle } from '@/lib/title';
 
 interface Account {
   id: string;
@@ -20,6 +21,7 @@ interface Account {
 }
 
 export function Accounts() {
+  usePageTitle('Accounts');
   const [side, setSide] = useState<'all' | 'supply' | 'demand'>('all');
   const [query, setQuery] = useState('');
 
diff --git a/apps/web/src/pages/Capacity.tsx b/apps/web/src/pages/Capacity.tsx
index 372ea21..59d574f 100644
--- a/apps/web/src/pages/Capacity.tsx
+++ b/apps/web/src/pages/Capacity.tsx
@@ -9,6 +9,7 @@ import { useState } from 'react';
 import { useMutation, useQuery } from '@tanstack/react-query';
 import { Search, Server, Zap } from 'lucide-react';
 import { compactNumber, get, money, percent, post, shortDate } from '@/lib/api';
+import { usePageTitle } from '@/lib/title';
 import {
   Badge,
   Button,
@@ -42,6 +43,7 @@ interface AvailabilityRow {
 type MatchRow = AvailabilityRow & { score: number; rationale: string[] };
 
 export function Capacity() {
+  usePageTitle('Capacity');
   const [tab, setTab] = useState<'available' | 'match'>('available');
 
   return (
diff --git a/apps/web/src/pages/Margin.tsx b/apps/web/src/pages/Margin.tsx
index ff5554d..731d0a1 100644
--- a/apps/web/src/pages/Margin.tsx
+++ b/apps/web/src/pages/Margin.tsx
@@ -8,6 +8,7 @@
 import { useQuery } from '@tanstack/react-query';
 import { compactNumber, get, money, moneyExact, percent } from '@/lib/api';
 import { Card, CardContent, CardHeader, CardTitle, EmptyState, Skeleton, Stat } from '@/components/ui';
+import { usePageTitle } from '@/lib/title';
 
 interface MarginReport {
   totals: {
@@ -36,6 +37,7 @@ interface MarginReport {
 }
 
 export function Margin() {
+  usePageTitle('Margin');
   const { data, isLoading } = useQuery({
     queryKey: ['margin'],
     queryFn: () => get<MarginReport>('/api/capacity/margin'),
diff --git a/apps/web/src/pages/Overview.tsx b/apps/web/src/pages/Overview.tsx
index 3edcb80..cc4a316 100644
--- a/apps/web/src/pages/Overview.tsx
+++ b/apps/web/src/pages/Overview.tsx
@@ -10,6 +10,7 @@ import { AlertTriangle, ArrowRight, Server, TrendingUp } from 'lucide-react';
 import { Link } from 'react-router-dom';
 import { compactNumber, get, money, percent, relativeTime } from '@/lib/api';
 import { Badge, Card, CardContent, CardHeader, CardTitle, EmptyState, Skeleton, Stat } from '@/components/ui';
+import { usePageTitle } from '@/lib/title';
 
 interface Dashboard {
   me: { name: string; teams: { team: string; role: string }[] };
@@ -44,6 +45,7 @@ interface Dashboard {
 }
 
 export function Overview() {
+  usePageTitle('Overview');
   const { data, isLoading, error } = useQuery({
     queryKey: ['dashboard'],
     queryFn: () => get<Dashboard>('/api/dashboard'),
diff --git a/apps/web/src/pages/Pipeline.tsx b/apps/web/src/pages/Pipeline.tsx
index 11d0c0b..03eb1c5 100644
--- a/apps/web/src/pages/Pipeline.tsx
+++ b/apps/web/src/pages/Pipeline.tsx
@@ -10,6 +10,7 @@ import { useMemo, useState } from 'react';
 import { useQuery } from '@tanstack/react-query';
 import { get, money, relativeTime } from '@/lib/api';
 import { Badge, Card, EmptyState, Skeleton } from '@/components/ui';
+import { usePageTitle } from '@/lib/title';
 
 interface DemandDeal {
   id: string;
@@ -126,6 +127,8 @@ function PipelineBoard<T extends { id: string; stage: string; updatedAt: string
   endpoint: string;
   renderCard: (deal: T, accountName: string | null) => React.ReactNode;
 }) {
+  usePageTitle(title);
+
   const { data, isLoading } = useQuery({
     queryKey: [endpoint],
     queryFn: () => get<Board<T>>(endpoint),
diff --git a/apps/web/src/pages/Settings.tsx b/apps/web/src/pages/Settings.tsx
index a8397df..4f71afb 100644
--- a/apps/web/src/pages/Settings.tsx
+++ b/apps/web/src/pages/Settings.tsx
@@ -6,12 +6,13 @@
  * devices rather than being a per-browser quirk.
  */
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
-import { Check, Monitor, Moon, Sun, Terminal } from 'lucide-react';
-import { get, patch } from '@/lib/api';
+import { Check, LogOut, Monitor, Moon, Sun, Terminal } from 'lucide-react';
+import { get, getSupabase, patch } from '@/lib/api';
 import { useTheme } from '@/lib/theme';
 import { getAccent, THEME_MODES, type ThemeMode } from '@pig/core';
 import { Badge, Button, Card, CardContent, CardHeader, CardTitle, Input } from '@/components/ui';
 import { useState } from 'react';
+import { usePageTitle } from '@/lib/title';
 
 interface Me {
   id: string;
@@ -23,6 +24,7 @@ interface Me {
 }
 
 export function Settings() {
+  usePageTitle('Settings');
   const { data: me } = useQuery({ queryKey: ['me'], queryFn: () => get<Me>('/api/me') });
 
   return (
@@ -34,6 +36,7 @@ export function Settings() {
       <Appearance />
       <Profile me={me} />
       <ConnectAgent />
+      <SessionCard />
     </div>
   );
 }
@@ -236,3 +239,47 @@ claude mcp add pig -- npx -y @pig/mcp`}</code>
     </Card>
   );
 }
+
+/**
+ * Signing out.
+ *
+ * There was no way to do this at all until now, which is an easy omission to
+ * make when developing signed in and a genuinely stranded feeling for anyone
+ * on a shared machine.
+ *
+ * Clearing the identity provider's session is enough: PIG holds no session of
+ * its own, and the auth listener in App.tsx notices and returns to sign-in
+ * without a reload.
+ */
+function SessionCard() {
+  const [busy, setBusy] = useState(false);
+
+  async function signOut() {
+    setBusy(true);
+    try {
+      await getSupabase()?.auth.signOut();
+    } finally {
+      // Belt and braces: if the provider call fails, a reload still lands on
+      // the sign-in screen rather than leaving a half-signed-out interface.
+      window.location.href = '/';
+    }
+  }
+
+  return (
+    <Card>
+      <CardHeader>
+        <CardTitle className="text-base">Session</CardTitle>
+        <p className="text-sm text-muted">
+          Signing out clears this browser only. API keys you have issued keep working —
+          revoke those separately.
+        </p>
+      </CardHeader>
+      <CardContent>
+        <Button variant="outline" onClick={signOut} disabled={busy}>
+          <LogOut className="h-4 w-4" aria-hidden />
+          {busy ? 'Signing out…' : 'Sign out'}
+        </Button>
+      </CardContent>
+    </Card>
+  );
+}