diff --git a/frontend/src/features/assets/page.tsx b/frontend/src/features/assets/page.tsx
index 229ad41..912fd31 100644
--- a/frontend/src/features/assets/page.tsx
+++ b/frontend/src/features/assets/page.tsx
@@ -48,6 +48,12 @@ import { ProfileForm, type ProfileFormCopy } from "../builds/page";
 import { SectionSkeleton } from "../../components/ui/section-skeleton";
 
 const text = localeMessageMap<Record<string, string>>("assetsText");
+type AssetTab = "ai" | "test-design" | "run-setup";
+const assetTabIds: AssetTab[] = ["ai", "test-design", "run-setup"];
+const assetTabFromLocation = (): AssetTab => {
+  const value = new URLSearchParams(window.location.search).get("tab");
+  return assetTabIds.includes(value as AssetTab) ? (value as AssetTab) : "ai";
+};
 const testBlank: TargetTestCaseSet = {
   id: "",
   name: "",
@@ -1063,6 +1069,7 @@ function LegacyAssetsPage({
   onUpdateWorkflow,
   onDelete,
   usage,
+  activeTab,
 }: {
   locale: Locale;
   workflows: Workflow[];
@@ -1075,6 +1082,7 @@ function LegacyAssetsPage({
   onUpdateWorkflow: (id: string, values: unknown) => Promise<unknown>;
   onDelete: (kind: "template" | "test-set" | "runner" | "workflow", id: string) => void;
   usage: AssetUsage;
+  activeTab: "ai" | "test-design" | "run-setup";
 }) {
   const createLabel = locales[locale].ui.create,
     l: Record<string, string> = {
@@ -1118,7 +1126,7 @@ function LegacyAssetsPage({
     );
   return (
     <>
-      <Catalog
+      {activeTab === "ai" && <Catalog
         locale={locale}
         loading={loading}
         emptyHint={l.emptyTemplates}
@@ -1153,8 +1161,8 @@ function LegacyAssetsPage({
             onDelete={() => onDelete("template", item.id)}
           />
         ))}
-      </Catalog>
-      <Catalog
+      </Catalog>}
+      {activeTab === "test-design" && <Catalog
         locale={locale}
         loading={loading}
         emptyHint={l.emptyTests}
@@ -1179,8 +1187,8 @@ function LegacyAssetsPage({
             onDelete={() => onDelete("test-set", item.id)}
           />
         ))}
-      </Catalog>
-      <Catalog
+      </Catalog>}
+      {activeTab === "run-setup" && <Catalog
         locale={locale}
         loading={loading}
         showRunners
@@ -1217,7 +1225,7 @@ function LegacyAssetsPage({
             onDelete={() => onDelete("workflow", item.id)}
           />
         ))}
-      </Catalog>
+      </Catalog>}
       {template && (
         <PromptTemplateEditor
           locale={locale}
@@ -1917,7 +1925,8 @@ function EnvironmentCatalog({
   );
 }
 
-function PersonaCatalog({ builds, onRefresh }: { builds: Build[]; onRefresh: () => Promise<unknown> }) {
+function PersonaCatalog({ builds, onRefresh, locale }: { builds: Build[]; onRefresh: () => Promise<unknown>; locale: Locale }) {
+  const t = text[locale];
   const [items, setItems] = useState<Persona[]>([]), [draft, setDraft] = useState<Persona | null>(null), [error, setError] = useState("");
   const load = () => api<Persona[]>("/api/personas").then(setItems);
   useEffect(() => { void load(); }, []);
@@ -1928,7 +1937,7 @@ function PersonaCatalog({ builds, onRefresh }: { builds: Build[]; onRefresh: ()
       .then(() => { setDraft(null); setError(""); return Promise.all([load(), onRefresh()]); })
       .catch((value) => setError(value.message));
   };
-  return <section className="panel app-settings"><div className="panel-title-action"><PanelHeader title="Personas" /><button className="approve" onClick={() => setDraft({ id: `persona-${Date.now()}`, name: "", locale: "en-US", timezone: "UTC", activity_windows: [], goals: [""], constraints: [], context: {} })}><Plus size={14} />Create</button></div><p className="hint">Reusable user perspectives, goals, constraints, and product-specific context. Runtime identity and memory are never stored here.</p><AssetCatalog emptyHint="No personas yet.">{items.map((item) => <AssetRow key={item.id} name={item.name} detail={`${item.locale} · ${item.timezone} · ${item.goals.length} goals`} usageCount={builds.filter((build) => build.persona_ids?.includes(item.id)).length} onClick={() => setDraft(item)} onDelete={() => api(`/api/personas/${item.id}`, "DELETE").then(() => Promise.all([load(), onRefresh()]).then(() => undefined)).catch((value) => setError(value.message))} />)}</AssetCatalog>{draft && <Modal open title="Persona" onClose={() => setDraft(null)}><div className="modal-form"><label className="modal-setting-row"><span>ID</span><input disabled={items.some((item) => item.id === draft.id)} value={draft.id} onChange={(event) => setDraft({ ...draft, id: event.target.value })} /></label><label className="modal-setting-row"><span>Name</span><input value={draft.name} onChange={(event) => setDraft({ ...draft, name: event.target.value })} /></label><label className="modal-setting-row"><span>Locale</span><input value={draft.locale} onChange={(event) => setDraft({ ...draft, locale: event.target.value })} /></label><label className="modal-setting-row"><span>Timezone</span><input value={draft.timezone} onChange={(event) => setDraft({ ...draft, timezone: event.target.value })} /></label><label className="modal-setting-row"><span>Goals (one per line)</span><textarea value={draft.goals.join("\n")} onChange={(event) => setDraft({ ...draft, goals: event.target.value.split("\n").filter(Boolean) })} /></label><label className="modal-setting-row"><span>Constraints (one per line)</span><textarea value={draft.constraints.join("\n")} onChange={(event) => setDraft({ ...draft, constraints: event.target.value.split("\n").filter(Boolean) })} /></label><label className="modal-setting-row"><span>Activity windows / context (JSON)</span><textarea value={JSON.stringify({ activity_windows: draft.activity_windows, context: draft.context }, null, 2)} onChange={(event) => { try { const value = JSON.parse(event.target.value); setDraft({ ...draft, activity_windows: value.activity_windows ?? [], context: value.context ?? {} }); setError(""); } catch { setError("Activity windows and context must be valid JSON"); } }} /></label><div className="modal-actions"><small>{error}</small><button className="approve" onClick={save}>Save</button></div></div></Modal>}</section>;
+  return <section className="panel app-settings"><div className="panel-title-action"><div className="panel-title-action__copy"><PanelHeader title={<SectionInfo title={t.personas} description={t.personaDescription} />} /><p className="hint section-description">{t.personaDescription}</p></div><button className="approve" onClick={() => setDraft({ id: `persona-${Date.now()}`, name: "", locale: "en-US", timezone: "UTC", activity_windows: [], goals: [""], constraints: [], context: {} })}><Plus size={14} />{locales[locale].ui.create}</button></div><AssetCatalog locale={locale} emptyHint={t.emptyPersonas}>{items.map((item) => <AssetRow key={item.id} name={item.name} detail={`${item.locale} · ${item.timezone} · ${item.goals.length} ${t.goals.toLowerCase()}`} usageCount={builds.filter((build) => build.persona_ids?.includes(item.id)).length} locale={locale} onClick={() => setDraft(item)} onDelete={() => api(`/api/personas/${item.id}`, "DELETE").then(() => Promise.all([load(), onRefresh()]).then(() => undefined)).catch((value) => setError(value.message))} />)}</AssetCatalog>{draft && <Modal open title={t.persona} onClose={() => setDraft(null)}><div className="modal-form"><label className="modal-setting-row"><span>{t.id}</span><input disabled={items.some((item) => item.id === draft.id)} value={draft.id} onChange={(event) => setDraft({ ...draft, id: event.target.value })} /></label><label className="modal-setting-row"><span>{t.name}</span><input value={draft.name} onChange={(event) => setDraft({ ...draft, name: event.target.value })} /></label><label className="modal-setting-row"><span>{t.locale}</span><input value={draft.locale} onChange={(event) => setDraft({ ...draft, locale: event.target.value })} /></label><label className="modal-setting-row"><span>{t.timezone}</span><input value={draft.timezone} onChange={(event) => setDraft({ ...draft, timezone: event.target.value })} /></label><label className="modal-setting-row"><span>{t.goals} ({t.goalsHint})</span><textarea value={draft.goals.join("\n")} onChange={(event) => setDraft({ ...draft, goals: event.target.value.split("\n").filter(Boolean) })} /></label><label className="modal-setting-row"><span>{t.constraints} ({t.constraintsHint})</span><textarea value={draft.constraints.join("\n")} onChange={(event) => setDraft({ ...draft, constraints: event.target.value.split("\n").filter(Boolean) })} /></label><label className="modal-setting-row"><span>{t.activityContext} ({t.activityContextHint})</span><textarea value={JSON.stringify({ activity_windows: draft.activity_windows, context: draft.context }, null, 2)} onChange={(event) => { try { const value = JSON.parse(event.target.value); setDraft({ ...draft, activity_windows: value.activity_windows ?? [], context: value.context ?? {} }); setError(""); } catch { setError(t.invalidPersonaJson); } }} /></label><div className="modal-actions"><small>{error}</small><button className="approve" onClick={save}>{t.save}</button></div></div></Modal>}</section>;
 }
 
 export function AssetsPage({
@@ -1977,6 +1986,28 @@ export function AssetsPage({
   ) => void;
 }) {
   const usage = useMemo(() => buildAssetUsage(builds), [builds]);
+  const tabs = [
+    { id: "ai" as const, label: text[locale].tabAI },
+    { id: "test-design" as const, label: text[locale].tabTestDesign },
+    { id: "run-setup" as const, label: text[locale].tabRunSetup },
+  ];
+  const [activeTab, setActiveTab] = useState<AssetTab>(assetTabFromLocation);
+  useEffect(() => {
+    const sync = () => setActiveTab(assetTabFromLocation());
+    window.addEventListener("popstate", sync);
+    return () => window.removeEventListener("popstate", sync);
+  }, []);
+  const selectTab = (tab: AssetTab) => {
+    if (tab === activeTab) return;
+    const url = new URL(window.location.href);
+    url.searchParams.set("tab", tab);
+    window.history.pushState(null, "", `${url.pathname}${url.search}${url.hash}`);
+    setActiveTab(tab);
+  };
+  const moveTab = (offset: number) => {
+    const index = tabs.findIndex((tab) => tab.id === activeTab);
+    selectTab(tabs[(index + offset + tabs.length) % tabs.length].id);
+  };
   if (loading) return <>
     <SectionSkeleton rows={3} />
     <SectionSkeleton rows={3} />
@@ -1987,6 +2018,29 @@ export function AssetsPage({
   </>;
   return (
     <>
+      <div className="asset-tabs" role="tablist" aria-label={text[locale].tabsLabel}>
+        {tabs.map((tab) => (
+          <button
+            key={tab.id}
+            id={`asset-tab-${tab.id}`}
+            role="tab"
+            type="button"
+            aria-selected={activeTab === tab.id}
+            aria-controls={`asset-panel-${tab.id}`}
+            tabIndex={activeTab === tab.id ? 0 : -1}
+            className={activeTab === tab.id ? "selected" : undefined}
+            onClick={() => selectTab(tab.id)}
+            onKeyDown={(event) => {
+              if (event.key === "ArrowRight") { event.preventDefault(); moveTab(1); }
+              if (event.key === "ArrowLeft") { event.preventDefault(); moveTab(-1); }
+            }}
+          >
+            {tab.label}
+          </button>
+        ))}
+      </div>
+      <div id={`asset-panel-${activeTab}`} role="tabpanel" aria-labelledby={`asset-tab-${activeTab}`}>
+      {activeTab === "ai" && <>
       <ProfileCatalog
         locale={locale}
         profiles={profiles}
@@ -1999,7 +2053,13 @@ export function AssetsPage({
         usage={usage.profiles}
         onDelete={(id) => onDelete("profile", id)}
       />
-      <PersonaCatalog builds={builds} onRefresh={legacy.onRefresh} />
+      <LegacyAssetsPage {...legacy} locale={locale} loading={loading} onDelete={onDelete} usage={usage} activeTab="ai" />
+      </>}
+      {activeTab === "test-design" && <>
+      <PersonaCatalog builds={builds} onRefresh={legacy.onRefresh} locale={locale} />
+      <LegacyAssetsPage {...legacy} locale={locale} loading={loading} onDelete={onDelete} usage={usage} activeTab="test-design" />
+      </>}
+      {activeTab === "run-setup" && <>
       <EnvironmentCatalog
         locale={locale}
         executionEnvironments={executionEnvironments}
@@ -2009,7 +2069,9 @@ export function AssetsPage({
         onDelete={onDelete}
         usage={usage}
       />
-      <LegacyAssetsPage {...legacy} locale={locale} loading={loading} onDelete={onDelete} usage={usage} />
+      <LegacyAssetsPage {...legacy} locale={locale} loading={loading} onDelete={onDelete} usage={usage} activeTab="run-setup" />
+      </>}
+      </div>
     </>
   );
 }
diff --git a/frontend/src/locales/languages/en.json b/frontend/src/locales/languages/en.json
index d240f80..2fb784b 100644
--- a/frontend/src/locales/languages/en.json
+++ b/frontend/src/locales/languages/en.json
@@ -12,6 +12,23 @@
       "savedHint": "Your draft is saved locally. Saving creates a new version."
     },
     "assetsText": {
+      "tabsLabel": "Asset categories",
+      "tabAI": "AI configuration",
+      "tabTestDesign": "Test design",
+      "tabRunSetup": "Run setup",
+      "personas": "Personas",
+      "persona": "Persona",
+      "personaDescription": "Define user characteristics, goals, and constraints to validate real user journeys.",
+      "emptyPersonas": "No personas yet.",
+      "locale": "Locale",
+      "timezone": "Timezone",
+      "goals": "Goals",
+      "goalsHint": "One per line",
+      "constraints": "Constraints",
+      "constraintsHint": "One per line",
+      "activityContext": "Activity windows / context",
+      "activityContextHint": "JSON",
+      "invalidPersonaJson": "Activity windows and context must be valid JSON",
       "profiles": "AI model profiles",
       "templates": "Manager prompt templates",
       "tests": "Target-AI fixed test cases",
@@ -110,7 +127,7 @@
     },
     "shell": {
       "dashboard": "Monitor task health, recent activity, and operational events at a glance.",
-      "assets": "Manage the reusable environments, runners, templates, test cases, and workflows used by tasks.",
+      "assets": "Manage reusable assets for AI configuration, test design, and run setup.",
       "builds": "Combine reusable assets into tasks, then run or test them.",
       "runs": "Inspect active and completed runs, their evidence, and approval decisions.",
       "improvements": "Review run feedback, proposed improvements, and their outcomes over time.",
diff --git a/frontend/src/locales/languages/ja.json b/frontend/src/locales/languages/ja.json
index ecb9a63..97a2b6c 100644
--- a/frontend/src/locales/languages/ja.json
+++ b/frontend/src/locales/languages/ja.json
@@ -11,6 +11,23 @@
       "savedHint": "下書きはローカルに保存されています。保存すると新しいバージョンが作成されます。"
     },
     "assetsText": {
+      "tabsLabel": "アセットのカテゴリー",
+      "tabAI": "AI 構成",
+      "tabTestDesign": "テスト設計",
+      "tabRunSetup": "実行設定",
+      "personas": "ペルソナ",
+      "persona": "ペルソナ",
+      "personaDescription": "ユーザーの特性、目標、制約を定義し、実際のユーザージャーニーを検証します。",
+      "emptyPersonas": "ペルソナはまだありません。",
+      "locale": "ロケール",
+      "timezone": "タイムゾーン",
+      "goals": "目標",
+      "goalsHint": "1 行に 1 つ",
+      "constraints": "制約",
+      "constraintsHint": "1 行に 1 つ",
+      "activityContext": "アクティビティ時間 / コンテキスト",
+      "activityContextHint": "JSON",
+      "invalidPersonaJson": "アクティビティ時間とコンテキストは有効な JSON である必要があります。",
       "profiles": "AIモデルプロファイル",
       "templates": "管理者プロンプトテンプレート",
       "tests": "対象AI固定テストケース",
@@ -104,7 +121,7 @@
     },
     "shell": {
       "dashboard": "評価の運用状態、最近のアクティビティ、運用イベントを一目で確認します。",
-      "assets": "評価で使う再利用可能な環境、ランナー、テンプレート、テストケース、ワークフローを管理します。",
+      "assets": "AI 構成、テスト設計、実行設定のための再利用可能なアセットを管理します。",
       "builds": "再利用可能なアセットをタスクとして組み合わせ、実行またはテストします。",
       "runs": "進行中・完了済みの実行、証跡、承認判断を確認します。",
       "improvements": "実行フィードバック、改善提案、時間に応じた成果を確認します。",
diff --git a/frontend/src/locales/languages/ko.json b/frontend/src/locales/languages/ko.json
index 2884ff1..28029a9 100644
--- a/frontend/src/locales/languages/ko.json
+++ b/frontend/src/locales/languages/ko.json
@@ -11,6 +11,23 @@
       "savedHint": "초안이 로컬에 저장되어 있습니다. 저장하면 새 버전이 생성됩니다."
     },
     "assetsText": {
+      "tabsLabel": "자산 카테고리",
+      "tabAI": "AI 구성",
+      "tabTestDesign": "테스트 설계",
+      "tabRunSetup": "실행 설정",
+      "personas": "페르소나",
+      "persona": "페르소나",
+      "personaDescription": "사용자 특성, 목표, 제약 조건을 정의해 실제 사용자 흐름을 검증합니다.",
+      "emptyPersonas": "아직 페르소나가 없습니다.",
+      "locale": "로케일",
+      "timezone": "시간대",
+      "goals": "목표",
+      "goalsHint": "한 줄에 하나씩",
+      "constraints": "제약 조건",
+      "constraintsHint": "한 줄에 하나씩",
+      "activityContext": "활동 시간 / 컨텍스트",
+      "activityContextHint": "JSON",
+      "invalidPersonaJson": "활동 시간과 컨텍스트는 유효한 JSON이어야 합니다.",
       "profiles": "AI 모델 프로필",
       "templates": "관리자 프롬프트 템플릿",
       "tests": "대상 AI 고정 테스트 케이스",
@@ -109,7 +126,7 @@
     },
     "shell": {
       "dashboard": "평가 운영 상태, 최근 활동, 운영 이벤트를 한눈에 확인합니다.",
-      "assets": "평가에 사용하는 재사용 환경, 러너, 템플릿, 테스트 케이스, 워크플로를 관리합니다.",
+      "assets": "AI 구성, 테스트 설계, 실행 설정을 위한 재사용 자산을 관리합니다.",
       "builds": "재사용 자산을 태스크로 조합한 뒤 실행하거나 테스트합니다.",
       "runs": "진행 중이거나 완료된 실행, 근거, 승인 결정을 확인합니다.",
       "improvements": "실행 피드백, 개선 제안, 시간에 따른 결과를 검토합니다.",
diff --git a/frontend/src/theme-overrides.css b/frontend/src/theme-overrides.css
index 7b160c8..90b1867 100644
--- a/frontend/src/theme-overrides.css
+++ b/frontend/src/theme-overrides.css
@@ -95,6 +95,7 @@ footer { display:flex; align-items:center; justify-content:space-between; margin
 .chat-message--assistant > :first-child { margin-top:0; }.chat-message--assistant > :last-child { margin-bottom:0; }.chat-message--assistant h1,.chat-message--assistant h2,.chat-message--assistant h3 { margin:12px 0 7px; font-size:13px; }.chat-message--assistant p,.chat-message--assistant ul,.chat-message--assistant ol { margin:8px 0; }.chat-message--assistant ul,.chat-message--assistant ol { padding-left:18px; }.chat-message--assistant a { color:var(--accent); }.chat-message--assistant pre { overflow-x:hidden; margin:9px 0; padding:9px; border-radius:6px; white-space:pre-wrap; overflow-wrap:anywhere; background:var(--bg); font:10px/1.55 'DM Mono',monospace; }.chat-message--assistant code { font:10px 'DM Mono',monospace; }.chat-message--assistant :not(pre) > code { padding:2px 4px; border-radius:4px; background:var(--bg); }.chat-message--assistant table { display:table; width:100%; max-width:100%; table-layout:fixed; border-collapse:collapse; }.chat-message--assistant th,.chat-message--assistant td { padding:5px 7px; overflow-wrap:anywhere; border:1px solid var(--line); text-align:left; }
 .run-detail-trigger { border:0; padding:0; color:inherit; background:transparent; text-align:left; cursor:pointer; }.run-detail { position:fixed; z-index:15; top:0; right:0; width:min(560px,100vw); height:100vh; overflow:auto; padding:24px; border-left:1px solid var(--line); background:var(--surface); box-shadow:-16px 0 48px rgb(0 0 0 / .35); }.run-detail header { margin-bottom:18px; }.run-tabs { display:flex; gap:6px; border-bottom:1px solid var(--line); }.run-tabs button { border:0; border-bottom:2px solid transparent; padding:10px 12px; color:var(--muted); background:transparent; }.run-tabs button.active { border-color:var(--accent); color:var(--text); }.console-output section { padding:14px 0; border-bottom:1px solid var(--line); }.console-output small { display:block; color:var(--muted); margin:4px 0; }.line-numbered-output { max-width:100%; overflow:auto; padding:8px 0; border:1px solid var(--line); border-radius:8px; background:var(--bg); color:var(--text); font:11px/1.55 'DM Mono',monospace; }.line-numbered-output > div { display:grid; grid-template-columns:46px minmax(0,1fr); min-width:max-content; }.line-numbered-output span { padding:0 10px; border-right:1px solid var(--line); color:var(--muted); text-align:right; user-select:none; }.line-numbered-output code { min-width:0; padding:0 12px; color:inherit; white-space:pre; }.supervisor-translation-action { display:flex; justify-content:flex-end; margin-bottom:10px; }.supervisor-output { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; padding:0; }.supervisor-output section { display:grid; grid-template-rows:auto minmax(0,1fr); gap:8px; height:clamp(260px,calc(100vh - 390px),460px); min-height:0; padding:12px; border:1px solid var(--line); border-radius:8px; background:var(--surface-raised); }.supervisor-output .line-numbered-output { min-height:0; }.supervisor-output__head { display:flex; align-items:center; justify-content:space-between; gap:12px; }.supervisor-output p { margin:0; overflow:auto; color:var(--muted); } @media(max-width:760px){.supervisor-output { grid-template-columns:1fr; }.supervisor-output section { height:300px; }}
 .iteration-navigator { display:flex; align-items:center; justify-content:flex-end; gap:6px; min-height:48px; border-bottom:1px solid var(--line); }.iteration-navigator select { width:auto; min-width:76px; height:30px; padding:0 28px 0 10px; font:11px 'DM Mono',monospace; }.iteration-navigator .icon-button { display:grid; width:30px; height:30px; place-items:center; padding:0; }.iteration-navigator .icon-button:disabled { cursor:not-allowed; opacity:.4; }
+.asset-tabs { display:flex; gap:4px; margin:0 0 16px; overflow-x:auto; border-bottom:1px solid var(--line); }.asset-tabs button { flex:0 0 auto; border:0; border-bottom:2px solid transparent; padding:10px 14px; color:var(--muted); background:transparent; font:600 12px/1.2 'DM Mono',monospace; }.asset-tabs button:hover,.asset-tabs button.selected { border-bottom-color:var(--accent); color:var(--text); }.asset-tabs button:focus-visible { outline:2px solid var(--accent); outline-offset:-2px; }
 .app-settings { display:grid; grid-template-columns:1fr; gap:0; }.app-settings + .app-settings { margin-top:16px; }.setting-row { display:flex !important; align-items:center; justify-content:space-between; gap:24px; padding:18px 0; border-top:1px solid var(--line); }.setting-row span { display:grid; gap:5px; }.setting-row strong { color:var(--text); }.setting-row select { min-width:220px; }.setting-actions { display:flex; align-items:center; gap:8px; }.setting-actions .approve { white-space:nowrap; }
 .setting-row--stacked { align-items:stretch; flex-direction:column; }.setting-row--stacked > span,.setting-row--stacked > .cm-editor,.setting-row--stacked > .setting-actions { width:100%; }.setting-row--stacked .setting-actions { justify-content:flex-end; }
 @media (max-width:900px) { .build-form,.profile-form { grid-template-columns:1fr; } }