diff --git a/app/(tabs)/_layout.tsx b/app/(tabs)/_layout.tsx
index 222ae37..46b74da 100644
--- a/app/(tabs)/_layout.tsx
+++ b/app/(tabs)/_layout.tsx
@@ -5,12 +5,14 @@ import { BottomTabBar } from '../../src/components/ui/BottomTabBar';
 import { AlertToast } from '../../src/components/alerts/AlertToast';
 
 /**
- * The read-only mirror shell (#218): five bottom tabs —
- * Glance · Planner · Skills · UI · Automations (which folds MCP servers in as
- * a segmented page). The app lands on Glance. Pairing, providers, theme, and
- * the (coming) Security audit page live behind the header's More corner.
- * The AlertToast (#222, generalising #219) overlays every tab: a paused
- * session or any fleet alert surfaces a banner deep-linking to its target.
+ * The read-only mirror shell (#218, reprioritised in #233): five bottom tabs —
+ * Glance · Planner · Studio · Skills · Automations (which folds MCP servers in
+ * as a segmented page). Studio folds Teams · Components · Algorithms · Sounds
+ * into one segmented page (the old two-segment "UI" tab). The app lands on
+ * Glance. Pairing, providers, theme, and the (coming) Security audit page live
+ * behind the header's More corner. The AlertToast (#222, generalising #219)
+ * overlays every tab: a paused session or any fleet alert surfaces a banner
+ * deep-linking to its target.
  */
 export default function TabsLayout() {
   return (
@@ -21,8 +23,8 @@ export default function TabsLayout() {
       >
         <Tabs.Screen name="index" options={{ title: 'Glance' }} />
         <Tabs.Screen name="plan" options={{ title: 'Planner' }} />
+        <Tabs.Screen name="ui" options={{ title: 'Studio' }} />
         <Tabs.Screen name="skills" options={{ title: 'Skills' }} />
-        <Tabs.Screen name="ui" options={{ title: 'UI' }} />
         <Tabs.Screen name="automations" options={{ title: 'Automations' }} />
       </Tabs>
       <AlertToast />
diff --git a/app/(tabs)/ui.tsx b/app/(tabs)/ui.tsx
index e3e0879..28a110d 100644
--- a/app/(tabs)/ui.tsx
+++ b/app/(tabs)/ui.tsx
@@ -2,25 +2,32 @@ import React, { useState } from 'react';
 import { Pressable, StyleSheet, Text, View } from 'react-native';
 import { useTheme } from '../../src/theme';
 import { MirrorScaffold } from '../../src/components/shell/MirrorScaffold';
+import { ScreenHeader } from '../../src/components/shell/ScreenHeader';
 import { ComponentsMirror } from '../../src/components/design/ComponentsMirror';
-import { ThemesMirror } from '../../src/components/design/ThemesMirror';
+import { TeamsMirror } from '../../src/components/design/TeamsMirror';
 
-type Segment = 'components' | 'themes';
+type Segment = 'teams' | 'components' | 'algorithms' | 'sounds';
 
 const SEGMENTS: ReadonlyArray<{ key: Segment; label: string }> = [
+  { key: 'teams', label: 'TEAMS' },
   { key: 'components', label: 'COMPONENTS' },
-  { key: 'themes', label: 'THEMES' },
+  { key: 'algorithms', label: 'ALGORITHMS' },
+  { key: 'sounds', label: 'SOUNDS' },
 ];
 
 /**
- * UI (Design) tab (#221) — mirrors the desktop's Design Studio read-only over two store domains: the
- * component kits + summaries (`components`, rendered as a composition graph or a by-kit list) and the
- * theme registry (`themes`, active highlighted). Each segment reads its own mirror domain, so each
- * keeps its own MirrorScaffold awaiting/empty state.
+ * Studio tab (#233) — reprioritised from the old two-segment "UI" tab (#221): reusable-artifact
+ * library, four segments sharing one page because Teams/Components/Algorithms/Sounds all render
+ * through the same `src/lib/graph` composition-graph pipeline (see the composition-graph decision in
+ * `src/lib/pages/designPage.ts`), not merely to save a tab slot. Themes moved to More (a registry you
+ * consult, not browse) and is no longer a segment here. Algorithms and Sounds ship dark — their mirror
+ * domains don't exist on the desktop yet (blocked on base-studio-code, tracked in #243) — until then
+ * each renders a static "coming soon" card rather than a MirrorScaffold awaiting-sync state, since no
+ * amount of waiting will sync them.
  */
-export default function UiTab() {
+export default function StudioTab() {
   const t = useTheme();
-  const [segment, setSegment] = useState<Segment>('components');
+  const [segment, setSegment] = useState<Segment>('teams');
 
   const toolbar = (
     <View style={[styles.segments, { borderBottomColor: t.borderColor }]}>
@@ -43,30 +50,70 @@ export default function UiTab() {
     </View>
   );
 
-  return segment === 'components' ? (
-    <MirrorScaffold
-      domain="components"
-      title="UI"
-      subtitle="Design Studio · component kits"
-      blurb="UI mirrors the desktop's Design Studio — the component kits and how they compose."
-      toolbar={toolbar}
-    >
-      {(data) => <ComponentsMirror data={data} />}
-    </MirrorScaffold>
-  ) : (
-    <MirrorScaffold
-      domain="themes"
-      title="UI"
-      subtitle="Design Studio · themes"
-      blurb="UI mirrors the desktop's theme registry — the semantic-token themes each kit restyles under."
-      toolbar={toolbar}
-    >
-      {(data) => <ThemesMirror data={data} />}
-    </MirrorScaffold>
+  switch (segment) {
+    case 'teams':
+      return (
+        <MirrorScaffold
+          domain="blueprints"
+          title="Studio"
+          subtitle="Teams · desktop blueprints"
+          blurb="Teams mirrors the desktop's blueprint library and the active blueprint's team graph."
+          toolbar={toolbar}
+        >
+          {(data) => <TeamsMirror data={data} />}
+        </MirrorScaffold>
+      );
+    case 'components':
+      return (
+        <MirrorScaffold
+          domain="components"
+          title="Studio"
+          subtitle="Component kits"
+          blurb="Components mirrors the desktop's Design Studio — the component kits and how they compose."
+          toolbar={toolbar}
+        >
+          {(data) => <ComponentsMirror data={data} />}
+        </MirrorScaffold>
+      );
+    case 'algorithms':
+      return (
+        <StudioComingSoon
+          toolbar={toolbar}
+          detail="Algorithms will mirror the desktop's algorithm library once it projects that domain over the tunnel."
+        />
+      );
+    case 'sounds':
+      return (
+        <StudioComingSoon
+          toolbar={toolbar}
+          detail="Sounds will mirror the desktop's sound library once it projects that domain over the tunnel."
+        />
+      );
+    default:
+      return null;
+  }
+}
+
+/** A segment whose mirror domain doesn't exist on the desktop yet — a static dark card, not a
+ *  MirrorScaffold awaiting-sync state (that implies syncing will eventually happen on its own). */
+function StudioComingSoon({ toolbar, detail }: { toolbar: React.ReactNode; detail: string }) {
+  const t = useTheme();
+  return (
+    <View style={styles.root}>
+      <ScreenHeader title="Studio" subtitle="Coming soon" />
+      {toolbar}
+      <View style={styles.comingSoonBody}>
+        <View style={[styles.comingSoonCard, { borderColor: t.borderColor }]}>
+          <Text style={[styles.comingSoonTitle, { color: t.fgMuted }]}>Coming soon</Text>
+          <Text style={[styles.comingSoonDetail, { color: t.fgDim }]}>{detail}</Text>
+        </View>
+      </View>
+    </View>
   );
 }
 
 const styles = StyleSheet.create({
+  root: { flex: 1 },
   segments: {
     flexDirection: 'row',
     borderBottomWidth: StyleSheet.hairlineWidth,
@@ -79,4 +126,17 @@ const styles = StyleSheet.create({
     borderBottomColor: 'transparent',
   },
   segmentText: { fontSize: 10.5, letterSpacing: 0.6, fontWeight: '600' },
+  comingSoonBody: { flex: 1, alignItems: 'center', justifyContent: 'center', padding: 24 },
+  comingSoonCard: {
+    alignSelf: 'stretch',
+    alignItems: 'center',
+    gap: 8,
+    paddingVertical: 28,
+    paddingHorizontal: 22,
+    borderWidth: StyleSheet.hairlineWidth,
+    borderStyle: 'dashed',
+    borderRadius: 10,
+  },
+  comingSoonTitle: { fontSize: 15, fontWeight: '600' },
+  comingSoonDetail: { fontSize: 12.5, lineHeight: 18, textAlign: 'center' },
 });
diff --git a/src/components/design/TeamsMirror.tsx b/src/components/design/TeamsMirror.tsx
new file mode 100644
index 0000000..dfefc6a
--- /dev/null
+++ b/src/components/design/TeamsMirror.tsx
@@ -0,0 +1,180 @@
+import React, { useMemo, useRef, useState } from 'react';
+import { Pressable, ScrollView, StyleSheet, Text, View } from 'react-native';
+import { useTheme } from '../../theme';
+import { useMirrorDomain } from '../../lib/mirror/MirrorContext';
+import { Surface } from '../ui/Surface';
+import { Tag } from '../ui/Tag';
+import { GraphCanvas, type GraphCanvasHandle, type GraphSelection } from '../graph/GraphCanvas';
+import { buildOrgScene, type GraphScene, type OrgGraphInput } from '../../lib/graph';
+import {
+  selectBlueprints, selectOrgPersonas, blueprintTeamToOrgInput, type BlueprintCardVM,
+} from '../../lib/pages/blueprintsPage';
+
+/**
+ * Teams mirror (#233) — Studio's Teams segment. Replaces the old Planner-tab `BlueprintsSection`'s
+ * `library | team` sub-toggle with a single flattened view: a blueprint picker strip above the team
+ * graph, so phones never stack three levels of segmentation (Studio segment → sub-toggle → list).
+ * Only the ACTIVE blueprint's team currently crosses the wire (base-studio-code#236), so picking a
+ * different blueprint shows a "no team mirrored yet" fallback rather than a graph — this falls away on
+ * its own once that lands, no mobile change needed. Reads `org` directly (like the old Planner tab did)
+ * to resolve persona refs for pool collapsing; enrichment only, so a missing `org` domain still renders.
+ */
+export function TeamsMirror({ data }: { data: unknown }) {
+  const t = useTheme();
+  const { data: orgData } = useMirrorDomain('org');
+  const model = useMemo(() => selectBlueprints(data), [data]);
+  const personas = useMemo(() => selectOrgPersonas(orgData), [orgData]);
+  const [selectedId, setSelectedId] = useState<string | null>(null);
+
+  if (!model) {
+    return (
+      <View style={styles.fallback}>
+        <Text style={[styles.fallbackText, { color: t.fgMuted }]}>Couldn’t read the desktop’s Blueprints projection.</Text>
+      </View>
+    );
+  }
+
+  if (model.library.length === 0) {
+    return (
+      <View style={styles.fallback}>
+        <Text style={[styles.fallbackText, { color: t.fgMuted }]}>No blueprints mirrored from the desktop yet.</Text>
+      </View>
+    );
+  }
+
+  const effectiveId = selectedId ?? model.active;
+  const selected = model.library.find((b) => b.id === effectiveId) ?? model.library[0];
+  const hasTeamData = effectiveId === model.active && !!model.activeTeam;
+  const orgInput: OrgGraphInput | null = hasTeamData && model.activeTeam
+    ? blueprintTeamToOrgInput(model.activeTeam, personas)
+    : null;
+
+  return (
+    <View style={styles.root}>
+      <BlueprintPicker
+        library={model.library}
+        activeId={model.active}
+        selectedId={effectiveId}
+        onSelect={setSelectedId}
+      />
+      {orgInput ? (
+        <TeamGraph input={orgInput} />
+      ) : (
+        <View style={styles.emptyTeam}>
+          <Text style={[styles.emptyTeamText, { color: t.fgDim }]}>
+            {selected.hasTeam
+              ? 'This blueprint’s team isn’t mirrored yet — only the active blueprint’s team crosses the wire today.'
+              : `${selected.name} has no team defined.`}
+          </Text>
+        </View>
+      )}
+    </View>
+  );
+}
+
+function BlueprintPicker({
+  library, activeId, selectedId, onSelect,
+}: {
+  library: BlueprintCardVM[];
+  activeId: string;
+  selectedId: string;
+  onSelect: (id: string) => void;
+}) {
+  const t = useTheme();
+  return (
+    <ScrollView
+      horizontal
+      showsHorizontalScrollIndicator={false}
+      style={styles.pickerRow}
+      contentContainerStyle={styles.pickerInner}
+    >
+      {library.map((b) => {
+        const selected = b.id === selectedId;
+        return (
+          <Pressable
+            key={b.id}
+            onPress={() => onSelect(b.id)}
+            accessibilityRole="button"
+            accessibilityLabel={b.name}
+            style={[
+              styles.chip,
+              { borderColor: selected ? t.accent : t.borderColor },
+              selected && { backgroundColor: t.surface },
+            ]}
+          >
+            {b.icon ? <Text style={styles.chipIcon}>{b.icon}</Text> : null}
+            <Text style={[styles.chipText, { color: selected ? t.fg : t.fgMuted }]} numberOfLines={1}>
+              {b.name}
+            </Text>
+            {b.id === activeId ? (
+              <Tag color={t.accent} bg={`${t.accent}22`} border={false}>Active</Tag>
+            ) : null}
+          </Pressable>
+        );
+      })}
+    </ScrollView>
+  );
+}
+
+function TeamGraph({ input }: { input: OrgGraphInput }) {
+  const t = useTheme();
+  const canvasRef = useRef<GraphCanvasHandle>(null);
+  const [selected, setSelected] = useState<GraphSelection | null>(null);
+  const scene: GraphScene = useMemo(() => buildOrgScene(input), [input]);
+  const node = selected?.kind === 'node' ? scene.nodes.find((n) => n.id === selected.id) : undefined;
+
+  const colors = {
+    card: t.surfaceSolid, cardStack: t.bg, border: t.borderColor,
+    text: t.fg, muted: t.fgMuted, selection: t.accent,
+  };
+
+  return (
+    <View style={styles.root}>
+      <View style={styles.toolbar}>
+        <Text style={[styles.crumb, { color: t.fgMuted }]}>team</Text>
+        <Pressable style={[styles.fitChip, { borderColor: t.borderColor }]} onPress={() => canvasRef.current?.fitToView()} hitSlop={6}>
+          <Text style={[styles.fitChipText, { color: t.fg }]}>Fit</Text>
+        </Pressable>
+      </View>
+      <GraphCanvas ref={canvasRef} scene={scene} selected={selected} onSelect={setSelected} colors={colors} style={styles.canvas} />
+      {node ? (
+        <Surface style={styles.inspector} radius={12}>
+          <Text style={[styles.inspTitle, { color: t.fg }]}>{node.title}</Text>
+          {node.subtitle ? <Text style={[styles.inspSub, { color: t.fgMuted }]}>{node.subtitle}</Text> : null}
+          {node.stackCount ? (
+            <Text style={[styles.inspSub, { color: t.fgDim }]}>
+              pool · {node.stackCount} members{node.homogeneous === false ? ' · mixed wiring' : ''}
+            </Text>
+          ) : null}
+        </Surface>
+      ) : (
+        <Text style={[styles.hint, { color: t.fgDim }]}>drag to pan · pinch to zoom · tap a position</Text>
+      )}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  root: { flex: 1 },
+  pickerRow: { flexGrow: 0, borderBottomWidth: StyleSheet.hairlineWidth, borderBottomColor: 'transparent' },
+  pickerInner: { flexDirection: 'row', gap: 8, paddingHorizontal: 14, paddingVertical: 10 },
+  chip: {
+    flexDirection: 'row', alignItems: 'center', gap: 6,
+    paddingHorizontal: 12, paddingVertical: 7, borderRadius: 15, borderWidth: StyleSheet.hairlineWidth,
+  },
+  chipIcon: { fontSize: 13 },
+  chipText: { fontSize: 12.5, fontWeight: '600', maxWidth: 140 },
+  emptyTeam: { flex: 1, alignItems: 'center', justifyContent: 'center', padding: 24 },
+  emptyTeamText: { fontSize: 12.5, lineHeight: 18, textAlign: 'center' },
+  toolbar: { flexDirection: 'row', alignItems: 'center', gap: 8, paddingHorizontal: 14, paddingVertical: 8 },
+  crumb: { flex: 1, fontSize: 11.5 },
+  fitChip: { paddingHorizontal: 11, paddingVertical: 5, borderRadius: 8, borderWidth: StyleSheet.hairlineWidth },
+  fitChipText: { fontSize: 12.5, fontWeight: '600' },
+  canvas: { flex: 1 },
+  inspector: { margin: 12, padding: 13, gap: 4 },
+  inspTitle: { fontSize: 15, fontWeight: '700' },
+  inspSub: { fontSize: 12 },
+  hint: { fontSize: 11, textAlign: 'center', paddingVertical: 12 },
+  fallback: { flex: 1, alignItems: 'center', justifyContent: 'center', padding: 24 },
+  fallbackText: { fontSize: 13, textAlign: 'center' },
+});
diff --git a/src/components/design/ThemesMirror.tsx b/src/components/design/ThemesMirror.tsx
deleted file mode 100644
index 7961235..0000000
--- a/src/components/design/ThemesMirror.tsx
+++ /dev/null
@@ -1,63 +0,0 @@
-import React, { useMemo } from 'react';
-import { ScrollView, StyleSheet, Text, View } from 'react-native';
-import { useSafeAreaInsets } from 'react-native-safe-area-context';
-import { useTheme } from '../../theme';
-import { Surface } from '../ui/Surface';
-import { Tag } from '../ui/Tag';
-import { selectThemes } from '../../lib/pages/designPage';
-
-/**
- * Themes mirror (#221) — read-only list of the desktop's `themes` domain, the active theme
- * highlighted. Each theme shows its label/description + semantic-token count. No editing.
- */
-export function ThemesMirror({ data }: { data: unknown }) {
-  const t = useTheme();
-  const insets = useSafeAreaInsets();
-  const model = useMemo(() => selectThemes(data), [data]);
-
-  if (!model) {
-    return (
-      <View style={styles.fallback}>
-        <Text style={[styles.fallbackText, { color: t.fgMuted }]}>Couldn’t read the desktop’s Themes projection.</Text>
-      </View>
-    );
-  }
-
-  return (
-    <ScrollView
-      style={styles.root}
-      contentContainerStyle={[styles.inner, { paddingBottom: insets.bottom + 24 }]}
-      showsVerticalScrollIndicator={false}
-    >
-      {model.themes.map((th) => (
-        <Surface
-          key={th.id}
-          style={[styles.card, th.active && { borderColor: t.accent, borderWidth: 1 }]}
-          radius={8}
-        >
-          <View style={styles.head}>
-            <Text style={[styles.name, { color: t.fg }]} numberOfLines={1}>{th.label}</Text>
-            {th.active ? <Tag color={t.accent} bg={`${t.accent}22`} border={false}>Active</Tag> : null}
-            {th.builtin ? <Tag border={false} bg={t.surface}>built-in</Tag> : null}
-          </View>
-          {th.description ? <Text style={[styles.desc, { color: t.fgMuted }]} numberOfLines={2}>{th.description}</Text> : null}
-          <Text style={[styles.meta, { color: t.fgDim }]}>
-            {th.varCount ? `${th.varCount} token override${th.varCount === 1 ? '' : 's'}` : 'base look'}
-          </Text>
-        </Surface>
-      ))}
-    </ScrollView>
-  );
-}
-
-const styles = StyleSheet.create({
-  root: { flex: 1 },
-  inner: { paddingHorizontal: 14, paddingTop: 12, gap: 10 },
-  card: { padding: 12, gap: 6 },
-  head: { flexDirection: 'row', alignItems: 'center', gap: 8 },
-  name: { flex: 1, fontSize: 14, fontWeight: '700' },
-  desc: { fontSize: 12, lineHeight: 17 },
-  meta: { fontSize: 11 },
-  fallback: { flex: 1, alignItems: 'center', justifyContent: 'center', padding: 24 },
-  fallbackText: { fontSize: 13, textAlign: 'center' },
-});