feat(agent-memory): UI fuer Agent-Memories mit semantischer Suche — Modul 8/16

Drittes Modul via Phase-Q-Manifest-Architektur: Registrierung komplett
ueber das agent_memory-Plugin-Manifest (page_route /agent-memory +
menu_item, Brain-Icon) — routes/index.tsx unangetastet. Komponenten-Map
mit 40 Eintraegen.

Zusaetzlicher Fix: Sidebar-ICON_MAP um Brain, Store, Tags erweitert —
Marketplace (Store) und Tags zeigten bisher Fallback-Icons, weil die
Manifest-Icons nicht in der kuratierten Map standen.

Backend existierte vollstaendig (create mit Embedding, list mit
agent_id-Pflichtfilter + Typ + Pagination, semantische Suche via pgvector,
update mit Embedding-Regeneration, delete; agent_memory:read/write),
Frontend hatte 0% Abdeckung.

- api/agentMemory.ts: TanStack-Hooks (useAgentMemories mit
  enabled-Gating, useAgentMemorySearch, create/update/delete)
- pages/AgentMemory.tsx: Agent-Picker (Pflichtfeld — Backend filtert
  zwingend nach agent_id), Pick-Agent-Prompt, semantische Suche mit
  Relevanz-Score-Badges und Clear, Memory-Karten mit Typ-Badges
  (fact/context/pattern/instruction), Create/Edit-Dialog, Delete mit
  Confirm — Aktionen hinter agent_memory:write
- i18n agentMemory.* + nav.agentMemory de/en

Verifikation: Vitest 11/11 (Agent-Picker-Pflicht, Pick-Prompt, Badges,
Suche mit Score + Clear, Create/Edit prefilled, Delete mit+ohne Confirm,
Gating, Empty/Error) · tsc exit 0 · production build exit 0 ·
Backend-Regressionen (route-order, m5-miniapps) 10/10 · compileall
sauber · Manifest-Check OK.

app/plugins/builtins/agent_memory/plugin.py

@@ -3,7 +3,12 @@
 from __future__ import annotations
 
 from app.plugins.base import BasePlugin
-from app.plugins.manifest import PluginManifest, PluginRouteDef
+from app.plugins.manifest import (
+    FrontendMenuItem,
+    FrontendPageRoute,
+    PluginManifest,
+    PluginRouteDef,
+)
 
 
 class AgentMemoryPlugin(BasePlugin):
@@ -28,6 +33,26 @@ class AgentMemoryPlugin(BasePlugin):
             "agent_memory:read",
             "agent_memory:write",
         ],
+        # UI-Backlog Modul 8 (2026-09-13): agent memory page, registered
+        # via the manifest (Phase Q pattern).
+        menu_items=[
+            FrontendMenuItem(
+                label_key="nav.agentMemory",
+                label="Agent Memory",
+                path="/agent-memory",
+                icon="Brain",
+                order=86,
+                permission="agent_memory:read",
+            ),
+        ],
+        page_routes=[
+            FrontendPageRoute(
+                path="/agent-memory",
+                component="@/pages/AgentMemory",
+                protected=True,
+                permission="agent_memory:read",
+            ),
+        ],
         is_core=True,
         author="LeoCRM Team",
         min_app_version="1.0.0",

frontend/src/__tests__/pages/AgentMemory.test.tsx

@@ -0,0 +1,260 @@
+/**
+ * AgentMemory page tests — persistent agent memories (module 8/16).
+ *
+ * Covers: agent picker requirement, pick-agent prompt, memory cards with
+ * type badges and search score, semantic search flow with clear, create
+ * flow, edit flow prefilled, delete with confirmation, permission gating
+ * (agent_memory:write), empty and error states.
+ */
+import React from 'react';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
+import { MemoryRouter } from 'react-router-dom';
+import { AgentMemoryPage } from '@/pages/AgentMemory';
+import type { AgentMemory } from '@/api/agentMemory';
+import type { AgentDefinition } from '@/types/automation';
+
+const createMut = vi.fn().mockImplementation((_payload, opts) => {
+  opts?.onSuccess?.({});
+  return Promise.resolve({});
+});
+const updateMut = vi.fn().mockImplementation((_payload, opts) => {
+  opts?.onSuccess?.({});
+  return Promise.resolve({});
+});
+const deleteMut = vi.fn().mockResolvedValue({});
+
+const AGENT: AgentDefinition = {
+  id: '11111111-1111-1111-1111-111111111111',
+  name: 'Test Agent',
+  description: '',
+  model: 'gpt-4o-mini',
+  heartbeat_interval: 0,
+  mode: 'reactive',
+  max_executions_per_hour: 0,
+  max_duration: 0,
+  budget_limit: 0,
+  active: true,
+  created_at: '2026-09-01T00:00:00Z',
+  updated_at: '2026-09-01T00:00:00Z',
+};
+
+const makeMemory = (overrides: Partial<AgentMemory> = {}): AgentMemory => ({
+  id: 'mem-1',
+  agent_id: AGENT.id,
+  memory_type: 'fact',
+  content: 'Kunde bevorzugt E-Mail',
+  owner_id: null,
+  created_at: '2026-09-01T10:00:00Z',
+  updated_at: null,
+  ...overrides,
+});
+
+let mockItems: AgentMemory[] = [];
+let mockSearchItems: AgentMemory[] = [];
+let mockCanWrite = true;
+let mockError = false;
+
+vi.mock('@/api/agentMemory', () => ({
+  useAgentMemories: () => ({
+    data: { items: mockItems, total: mockItems.length },
+    isLoading: false,
+    isError: mockError,
+    isFetching: false,
+    refetch: vi.fn(),
+  }),
+  useAgentMemorySearch: () => ({
+    data: { items: mockSearchItems, total: mockSearchItems.length },
+    isLoading: false,
+    isError: false,
+    isFetching: false,
+    refetch: vi.fn(),
+  }),
+  useCreateAgentMemory: () => ({
+    mutate: createMut,
+    isPending: false,
+  }),
+  useUpdateAgentMemory: () => ({
+    mutate: updateMut,
+    isPending: false,
+  }),
+  useDeleteAgentMemory: () => ({
+    mutate: deleteMut,
+    isPending: false,
+  }),
+}));
+
+vi.mock('@/api/automation', () => ({
+  useAgents: () => ({
+    data: [AGENT],
+    isLoading: false,
+    isError: false,
+  }),
+}));
+
+vi.mock('@/hooks/usePermission', () => ({
+  usePermission: () => ({
+    hasPermission: (perm: string) =>
+      mockCanWrite || perm !== 'agent_memory:write',
+  }),
+}));
+
+function renderPage() {
+  return render(
+    <MemoryRouter>
+      <AgentMemoryPage />
+    </MemoryRouter>,
+  );
+}
+
+function pickAgent() {
+  const select = screen.getByRole('combobox');
+  fireEvent.change(select, { target: { value: AGENT.id } });
+}
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  mockItems = [];
+  mockSearchItems = [];
+  mockCanWrite = true;
+  mockError = false;
+});
+
+describe('AgentMemoryPage', () => {
+  it('renders the page with title and agent picker', () => {
+    renderPage();
+    expect(screen.getByTestId('agent-memory-page')).toBeInTheDocument();
+    expect(screen.getByRole('combobox')).toBeInTheDocument();
+  });
+
+  it('shows the pick-agent prompt before an agent is selected', () => {
+    renderPage();
+    expect(screen.getByTestId('agent-memory-pick-agent')).toBeInTheDocument();
+    // list is not loaded without an agent — no empty state yet
+    expect(screen.queryByTestId('agent-memory-empty')).not.toBeInTheDocument();
+  });
+
+  it('shows empty state after picking an agent with no memories', () => {
+    renderPage();
+    pickAgent();
+    expect(screen.getByTestId('agent-memory-empty')).toBeInTheDocument();
+  });
+
+  it('shows error state on load failure', () => {
+    mockError = true;
+    renderPage();
+    pickAgent();
+    expect(screen.getByTestId('agent-memory-error')).toBeInTheDocument();
+  });
+
+  it('renders memory cards with type badge', () => {
+    mockItems = [makeMemory()];
+    renderPage();
+    pickAgent();
+    expect(screen.getByTestId('memory-card-mem-1')).toBeInTheDocument();
+    expect(screen.getByTestId('memory-type-mem-1')).toHaveTextContent('fact');
+    expect(screen.getByTestId('memory-content-mem-1')).toHaveTextContent('Kunde bevorzugt E-Mail');
+  });
+
+  it('hides create and action buttons without agent_memory:write', () => {
+    mockItems = [makeMemory()];
+    mockCanWrite = false;
+    renderPage();
+    pickAgent();
+    expect(screen.queryByTestId('memory-create-open')).not.toBeInTheDocument();
+    expect(screen.queryByTestId('memory-edit-mem-1')).not.toBeInTheDocument();
+    expect(screen.queryByTestId('memory-delete-mem-1')).not.toBeInTheDocument();
+  });
+
+  it('creates a memory via the dialog after picking an agent', async () => {
+    renderPage();
+    pickAgent();
+    fireEvent.click(screen.getByTestId('memory-create-open'));
+    expect(screen.getByTestId('memory-form-submit')).toBeInTheDocument();
+
+    const contentArea = screen.getByTestId('memory-content-input') as HTMLTextAreaElement;
+    fireEvent.change(contentArea, { target: { value: 'Neues Wissen' } });
+
+    fireEvent.click(screen.getByTestId('memory-form-submit'));
+
+    await waitFor(() => {
+      expect(createMut).toHaveBeenCalledWith(
+        expect.objectContaining({
+          agent_id: AGENT.id,
+          memory_type: 'fact',
+          content: 'Neues Wissen',
+        }),
+        expect.anything(),
+      );
+    });
+  });
+
+  it('opens the edit dialog prefilled and submits the update', async () => {
+    mockItems = [makeMemory({ memory_type: 'instruction' })];
+    renderPage();
+    pickAgent();
+    fireEvent.click(screen.getByTestId('memory-edit-mem-1'));
+
+    const contentArea = screen.getByTestId('memory-content-input') as HTMLTextAreaElement;
+    expect(contentArea).toHaveValue('Kunde bevorzugt E-Mail');
+    fireEvent.change(contentArea, { target: { value: 'Geaendertes Wissen' } });
+
+    fireEvent.click(screen.getByTestId('memory-form-submit'));
+
+    await waitFor(() => {
+      expect(updateMut).toHaveBeenCalledWith(
+        {
+          memoryId: 'mem-1',
+          payload: expect.objectContaining({
+            content: 'Geaendertes Wissen',
+            memory_type: 'instruction',
+          }),
+        },
+        expect.anything(),
+      );
+    });
+  });
+
+  it('runs a semantic search and shows scored results, then clears', async () => {
+    mockItems = [makeMemory()];
+    mockSearchItems = [makeMemory({ id: 'mem-2', score: 0.87 })];
+    renderPage();
+    pickAgent();
+
+    const searchInput = screen.getByTestId('memory-search');
+    fireEvent.change(searchInput, { target: { value: 'E-Mail' } });
+    fireEvent.click(screen.getByTestId('memory-search-btn'));
+
+    // Scored search result is rendered
+    expect(await screen.findByTestId('memory-card-mem-2')).toBeInTheDocument();
+    expect(screen.getByText(/87%/)).toBeInTheDocument();
+    expect(screen.getByTestId('memory-search-clear')).toBeInTheDocument();
+
+    // Clear returns to list mode
+    fireEvent.click(screen.getByTestId('memory-search-clear'));
+    await waitFor(() => {
+      expect(screen.getByTestId('memory-card-mem-1')).toBeInTheDocument();
+      expect(screen.queryByTestId('memory-card-mem-2')).not.toBeInTheDocument();
+    });
+  });
+
+  it('deletes a memory after confirmation', async () => {
+    mockItems = [makeMemory()];
+    window.confirm = vi.fn(() => true);
+    renderPage();
+    pickAgent();
+    fireEvent.click(screen.getByTestId('memory-delete-mem-1'));
+    await waitFor(() => {
+      expect(deleteMut).toHaveBeenCalledWith('mem-1');
+    });
+  });
+
+  it('does not delete when the confirmation is rejected', () => {
+    mockItems = [makeMemory()];
+    window.confirm = vi.fn(() => false);
+    renderPage();
+    pickAgent();
+    fireEvent.click(screen.getByTestId('memory-delete-mem-1'));
+    expect(deleteMut).not.toHaveBeenCalled();
+  });
+});

frontend/src/api/agentMemory.ts

@@ -0,0 +1,124 @@
+/**
+ * Agent Memory API client — persistent agent memories with pgvector
+ * semantic search.
+ *
+ * Backend: /api/v1/agent-memory (create, list, search, update, delete).
+ * Memories store facts, context, patterns and instructions for AI agents.
+ * Permissions: agent_memory:read (list/search) / agent_memory:write
+ * (create, update, delete).
+ */
+
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { apiGet, apiPost, apiPatch, apiDelete } from '@/api/client';
+
+export interface AgentMemory {
+  id: string;
+  agent_id: string;
+  memory_type: string;
+  content: string;
+  owner_id: string | null;
+  created_at: string | null;
+  updated_at: string | null;
+  /** Similarity score — only set by semantic search results. */
+  score?: number;
+}
+
+export interface AgentMemoryListResponse {
+  items: AgentMemory[];
+  total: number;
+}
+
+export interface AgentMemoryCreatePayload {
+  agent_id: string;
+  memory_type: string;
+  content: string;
+}
+
+export interface AgentMemoryUpdatePayload {
+  content?: string;
+  memory_type?: string;
+}
+
+export interface AgentMemoryListParams {
+  agentId: string;
+  memoryType?: string;
+  page?: number;
+  pageSize?: number;
+}
+
+export interface AgentMemorySearchParams {
+  agentId: string;
+  query: string;
+  memoryType?: string;
+  limit?: number;
+  minScore?: number;
+}
+
+// ─── Query hooks ─────────────────────────────────────────────
+
+export function useAgentMemories(params: AgentMemoryListParams) {
+  const searchParams = new URLSearchParams();
+  searchParams.set('agent_id', params.agentId);
+  if (params.memoryType) searchParams.set('memory_type', params.memoryType);
+  if (params.page) searchParams.set('page', String(params.page));
+  if (params.pageSize) searchParams.set('page_size', String(params.pageSize));
+
+  return useQuery<AgentMemoryListResponse>({
+    queryKey: ['agent-memories', params.agentId, params.memoryType, params.page, params.pageSize],
+    queryFn: () => apiGet<AgentMemoryListResponse>(`/agent-memory?${searchParams.toString()}`),
+    enabled: !!params.agentId,
+  });
+}
+
+export function useAgentMemorySearch(params: AgentMemorySearchParams) {
+  const searchParams = new URLSearchParams();
+  searchParams.set('agent_id', params.agentId);
+  searchParams.set('query', params.query);
+  if (params.memoryType) searchParams.set('memory_type', params.memoryType);
+  if (params.limit) searchParams.set('limit', String(params.limit));
+  if (params.minScore !== undefined) searchParams.set('min_score', String(params.minScore));
+
+  return useQuery<AgentMemoryListResponse>({
+    queryKey: ['agent-memories', 'search', params.agentId, params.query, params.memoryType],
+    queryFn: () => apiGet<AgentMemoryListResponse>(`/agent-memory/search?${searchParams.toString()}`),
+    enabled: !!params.agentId && !!params.query,
+  });
+}
+
+// ─── Mutation hooks ──────────────────────────────────────────
+
+function useInvalidateMemories() {
+  const qc = useQueryClient();
+  return () => {
+    qc.invalidateQueries({ queryKey: ['agent-memories'] });
+  };
+}
+
+export function useCreateAgentMemory() {
+  const invalidate = useInvalidateMemories();
+  return useMutation<AgentMemory, Error, AgentMemoryCreatePayload>({
+    mutationFn: (data) => apiPost<AgentMemory>('/agent-memory', data),
+    onSuccess: invalidate,
+  });
+}
+
+export function useUpdateAgentMemory() {
+  const invalidate = useInvalidateMemories();
+  return useMutation<
+    AgentMemory,
+    Error,
+    { memoryId: string; payload: AgentMemoryUpdatePayload }
+  >({
+    mutationFn: ({ memoryId, payload }) =>
+      apiPatch<AgentMemory>(`/agent-memory/${memoryId}`, payload),
+    onSuccess: invalidate,
+  });
+}
+
+export function useDeleteAgentMemory() {
+  const invalidate = useInvalidateMemories();
+  return useMutation<void, Error, string>({
+    mutationFn: (memoryId) => apiDelete(`/agent-memory/${memoryId}`),
+    onSuccess: invalidate,
+  });
+}

frontend/src/components/layout/Sidebar.tsx

@@ -3,7 +3,7 @@ import clsx from 'clsx';
 import { NavLink, useLocation, useNavigate } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import { useUIStore } from '@/store/uiStore';
-import { ArrowLeft, ArrowRightLeft, CheckCircle2, ChevronRight, FileText, Home, Settings, Users } from 'lucide-react';
+import { ArrowLeft, ArrowRightLeft, Brain, CheckCircle2, ChevronRight, FileText, Home, Settings, Store, Tags, Users } from 'lucide-react';
 import { usePluginStore } from '@/store/pluginStore';
 // Curated icon map — avoids `import * as LucideIcons` which loads ALL icons and causes OOM in tests
 import {
@@ -26,6 +26,7 @@ const ICON_MAP: Record<string, React.ComponentType<{ className?: string }>> = {
   MoreVertical, RefreshCw, Download, Upload, Eye, EyeOff, Lock,
   Unlock, Clock, AlertCircle, CheckCircle, XCircle, Info, Loader2,
   Inbox, Send, ChevronRight, BookOpen, Lightbulb,
+  Brain, Store, Tags, ArrowRightLeft,
 };
 import { useMenuOrder } from '@/api/users';
 import { usePermission } from '@/hooks/usePermission';

frontend/src/generated/pluginComponents.generated.ts

@@ -31,6 +31,7 @@ export const PLUGIN_COMPONENT_MAP: Record<string, LazyComponentFactory> = {
   '@/components/dashboard/WikiRecentWidget': () => import('@/components/dashboard/WikiRecentWidget').then((m) => ({ default: m.WikiRecentWidget })),
   '@/pages/AIAssistant': () => import('@/pages/AIAssistant').then(normalizeModule),
   '@/pages/AISettings': () => import('@/pages/AISettings').then((m) => ({ default: m.AISettingsPage })),
+  '@/pages/AgentMemory': () => import('@/pages/AgentMemory').then(normalizeModule),
   '@/pages/AutomationSettings': () => import('@/pages/AutomationSettings').then((m) => ({ default: m.AutomationSettingsPage })),
   '@/pages/Calendar': () => import('@/pages/Calendar').then(normalizeModule),
   '@/pages/CalendarKanban': () => import('@/pages/CalendarKanban').then(normalizeModule),

frontend/src/i18n/locales/de.json

@@ -25,7 +25,8 @@
     "approvals": "Freigaben",
     "delegations": "Delegationen",
     "marketplace": "Marketplace",
-    "skills": "Skills"
+    "skills": "Skills",
+    "agentMemory": "Agent Memory"
   },
   "auth": {
     "login": "Anmelden",
@@ -1788,5 +1789,36 @@
     "deleteConfirm": "Skill '{{name}}' wirklich loeschen?",
     "empty": "Keine Skills vorhanden.",
     "loadError": "Skills konnten nicht geladen werden."
+  },
+  "agentMemory": {
+    "title": "Agent Memory",
+    "agentLabel": "Agent",
+    "agentPlaceholder": "Agent auswaehlen",
+    "loadingAgents": "Lade Agenten...",
+    "pickAgent": "Bitte einen Agenten auswaehlen, um dessen Memories zu sehen.",
+    "create": "Memory erstellen",
+    "createTitle": "Neues Memory",
+    "createSubmit": "Erstellen",
+    "editTitle": "Memory bearbeiten",
+    "save": "Speichern",
+    "memoryType": "Typ",
+    "type_fact": "Fakt",
+    "type_context": "Kontext",
+    "type_pattern": "Muster",
+    "type_instruction": "Anweisung",
+    "content": "Inhalt",
+    "contentPlaceholder": "Was soll der Agent sich merken?",
+    "search": "Suchen",
+    "searchPlaceholder": "Semantische Suche... (Enter)",
+    "clearSearch": "Zuruecksetzen",
+    "searchResults": "{{count}} Treffer (semantisch)",
+    "noSearchResults": "Keine Treffer fuer diese Suche.",
+    "score": "Relevanz: {{score}}%",
+    "created": "Erstellt:",
+    "edit": "Bearbeiten",
+    "delete": "Loeschen",
+    "deleteConfirm": "Dieses Memory wirklich loeschen?",
+    "empty": "Keine Memories fuer diesen Agenten.",
+    "loadError": "Memories konnten nicht geladen werden."
   }
 }

frontend/src/i18n/locales/en.json

@@ -25,7 +25,8 @@
     "approvals": "Approvals",
     "delegations": "Delegations",
     "marketplace": "Marketplace",
-    "skills": "Skills"
+    "skills": "Skills",
+    "agentMemory": "Agent Memory"
   },
   "auth": {
     "login": "Sign In",
@@ -1788,5 +1789,36 @@
     "deleteConfirm": "Really delete skill '{{name}}'?",
     "empty": "No skills yet.",
     "loadError": "Failed to load skills."
+  },
+  "agentMemory": {
+    "title": "Agent Memory",
+    "agentLabel": "Agent",
+    "agentPlaceholder": "Select an agent",
+    "loadingAgents": "Loading agents...",
+    "pickAgent": "Pick an agent to see its memories.",
+    "create": "Create memory",
+    "createTitle": "New memory",
+    "createSubmit": "Create",
+    "editTitle": "Edit memory",
+    "save": "Save",
+    "memoryType": "Type",
+    "type_fact": "Fact",
+    "type_context": "Context",
+    "type_pattern": "Pattern",
+    "type_instruction": "Instruction",
+    "content": "Content",
+    "contentPlaceholder": "What should the agent remember?",
+    "search": "Search",
+    "searchPlaceholder": "Semantic search... (Enter)",
+    "clearSearch": "Clear",
+    "searchResults": "{{count}} matches (semantic)",
+    "noSearchResults": "No matches for this search.",
+    "score": "Relevance: {{score}}%",
+    "created": "Created:",
+    "edit": "Edit",
+    "delete": "Delete",
+    "deleteConfirm": "Really delete this memory?",
+    "empty": "No memories for this agent.",
+    "loadError": "Failed to load memories."
   }
 }

frontend/src/pages/AgentMemory.tsx

@@ -0,0 +1,419 @@
+/**
+ * Agent Memory page — persistent AI agent memories with semantic search
+ * (UI-Backlog module 8/16).
+ *
+ * Backend: /api/v1/agent-memory. Memories store facts, context, patterns
+ * and instructions for AI agents; search is pgvector-based semantic search.
+ * Permissions: agent_memory:read (list/search) / agent_memory:write
+ * (create, update, delete).
+ *
+ * NOTE (Phase Q): registered via the agent_memory PLUGIN MANIFEST —
+ * routes/index.tsx and Sidebar.tsx untouched.
+ */
+
+import React, { useMemo, useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import {
+  Brain,
+  Plus,
+  Pencil,
+  Trash2,
+  Search,
+  Bot,
+  AlertTriangle,
+  Inbox,
+} from 'lucide-react';
+import {
+  useAgentMemories,
+  useAgentMemorySearch,
+  useCreateAgentMemory,
+  useUpdateAgentMemory,
+  useDeleteAgentMemory,
+  type AgentMemory,
+} from '@/api/agentMemory';
+import { useAgents } from '@/api/automation';
+import { usePermission } from '@/hooks/usePermission';
+import { Card } from '@/components/ui/Card';
+import { Button } from '@/components/ui/Button';
+import { Modal } from '@/components/ui/Modal';
+import { Select } from '@/components/ui/Select';
+import { Input } from '@/components/ui/Input';
+import { Badge } from '@/components/ui/Badge';
+
+const MEMORY_TYPES = ['fact', 'context', 'pattern', 'instruction'] as const;
+type MemoryType = (typeof MEMORY_TYPES)[number];
+
+const TYPE_BADGE: Record<string, string> = {
+  fact: 'bg-primary-100 text-primary-800',
+  context: 'bg-accent-100 text-accent-800',
+  pattern: 'bg-warning-100 text-warning-800',
+  instruction: 'bg-success-100 text-success-800',
+};
+
+function formatDateTime(iso: string | null): string {
+  if (!iso) return '—';
+  try {
+    return new Date(iso).toLocaleString();
+  } catch {
+    return iso;
+  }
+}
+
+function MemoryCard({
+  memory,
+  canWrite,
+  onEdit,
+  onDelete,
+  isMutating,
+}: {
+  memory: AgentMemory;
+  canWrite: boolean;
+  onEdit: (m: AgentMemory) => void;
+  onDelete: (m: AgentMemory) => void;
+  isMutating: boolean;
+}) {
+  const { t } = useTranslation();
+
+  return (
+    <Card className="p-4" data-testid={`memory-card-${memory.id}`}>
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-start sm:justify-between">
+        <div className="min-w-0 flex-1">
+          <div className="flex items-center gap-2 flex-wrap">
+            <span data-testid={`memory-type-${memory.id}`}>
+              <Badge className={TYPE_BADGE[memory.memory_type] ?? 'bg-secondary-100 text-secondary-800'}>
+                {memory.memory_type}
+              </Badge>
+            </span>
+            {memory.score !== undefined && memory.score > 0 && (
+              <Badge variant="secondary">{t('agentMemory.score', { score: (memory.score * 100).toFixed(0) })}</Badge>
+            )}
+          </div>
+          <p className="mt-2 text-sm text-secondary-900 dark:text-secondary-100 whitespace-pre-wrap" data-testid={`memory-content-${memory.id}`}>
+            {memory.content}
+          </p>
+          <div className="mt-2 text-xs text-secondary-500 dark:text-secondary-400">
+            {t('agentMemory.created')} {formatDateTime(memory.created_at)}
+          </div>
+        </div>
+        {canWrite && (
+          <div className="flex gap-2 flex-shrink-0">
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={() => onEdit(memory)}
+              disabled={isMutating}
+              aria-label={t('agentMemory.edit')}
+              data-testid={`memory-edit-${memory.id}`}
+            >
+              <Pencil className="w-4 h-4" aria-hidden="true" />
+            </Button>
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={() => onDelete(memory)}
+              disabled={isMutating}
+              aria-label={t('agentMemory.delete')}
+              data-testid={`memory-delete-${memory.id}`}
+              className="text-danger-600 hover:text-danger-700"
+            >
+              <Trash2 className="w-4 h-4" aria-hidden="true" />
+            </Button>
+          </div>
+        )}
+      </div>
+    </Card>
+  );
+}
+
+function MemoryFormDialog({
+  open,
+  agentId,
+  memory,
+  onClose,
+  onSubmit,
+  isSubmitting,
+}: {
+  open: boolean;
+  agentId: string;
+  memory: AgentMemory | null;
+  onClose: () => void;
+  onSubmit: (payload: { agent_id: string; memory_type: string; content: string }) => void;
+  isSubmitting: boolean;
+}) {
+  const { t } = useTranslation();
+  const [memoryType, setMemoryType] = useState<MemoryType>('fact');
+  const [content, setContent] = useState('');
+
+  React.useEffect(() => {
+    if (open) {
+      setMemoryType((memory?.memory_type as MemoryType) ?? 'fact');
+      setContent(memory?.content ?? '');
+    }
+  }, [open, memory]);
+
+  const valid = content.trim().length > 0;
+
+  const submit = () => {
+    if (!valid) return;
+    onSubmit({
+      agent_id: agentId,
+      memory_type: memoryType,
+      content: content.trim(),
+    });
+  };
+
+  return (
+    <Modal
+      open={open}
+      onClose={onClose}
+      title={memory ? t('agentMemory.editTitle') : t('agentMemory.createTitle')}
+    >
+      <div className="space-y-4">
+        <Select
+          label={t('agentMemory.memoryType')}
+          options={MEMORY_TYPES.map((mt) => ({ value: mt, label: t(`agentMemory.type_${mt}`) }))}
+          value={memoryType}
+          onChange={(e) => setMemoryType(e.target.value as MemoryType)}
+          required
+        />
+        <div>
+          <label htmlFor="am-content" className="block text-sm font-medium text-secondary-700 mb-1">
+            {t('agentMemory.content')} *
+          </label>
+          <textarea
+            id="am-content"
+            value={content}
+            onChange={(e) => setContent(e.target.value)}
+            rows={4}
+            className="block w-full rounded-md border border-secondary-300 px-3 py-2 text-sm"
+            placeholder={t('agentMemory.contentPlaceholder')}
+            aria-label={t('agentMemory.content')}
+            data-testid="memory-content-input"
+          />
+        </div>
+        <div className="flex justify-end gap-2 pt-2">
+          <Button variant="ghost" onClick={onClose}>{t('common.cancel')}</Button>
+          <Button onClick={submit} disabled={!valid || isSubmitting} data-testid="memory-form-submit">
+            {memory ? t('agentMemory.save') : t('agentMemory.createSubmit')}
+          </Button>
+        </div>
+      </div>
+    </Modal>
+  );
+}
+
+export function AgentMemoryPage() {
+  const { t } = useTranslation();
+  const [agentId, setAgentId] = useState('');
+  const [searchQuery, setSearchQuery] = useState('');
+  const [activeSearchQuery, setActiveSearchQuery] = useState('');
+  const [showCreate, setShowCreate] = useState(false);
+  const [editMemory, setEditMemory] = useState<AgentMemory | null>(null);
+
+  const { data: agentsData, isLoading: agentsLoading } = useAgents();
+  const canRead = usePermission().hasPermission('agent_memory:read');
+  const canWrite = usePermission().hasPermission('agent_memory:write');
+
+  const listQuery = useAgentMemories({ agentId, pageSize: 50 });
+  const searchQuery_ = useAgentMemorySearch({
+    agentId,
+    query: activeSearchQuery,
+    limit: 20,
+  });
+  const createMut = useCreateAgentMemory();
+  const updateMut = useUpdateAgentMemory();
+  const deleteMut = useDeleteAgentMemory();
+
+  const isMutating = createMut.isPending || updateMut.isPending || deleteMut.isPending;
+  const isSearching = activeSearchQuery.length > 0;
+
+  const agentOptions = useMemo(
+    () =>
+      (agentsData ?? [])
+        .map((a) => ({ value: a.id, label: a.name }))
+        .sort((a, b) => a.label.localeCompare(b.label)),
+    [agentsData],
+  );
+
+  const handleCreate = (payload: { agent_id: string; memory_type: string; content: string }) => {
+    createMut.mutate(payload, {
+      onSuccess: () => setShowCreate(false),
+    });
+  };
+
+  const handleEdit = (payload: { agent_id: string; memory_type: string; content: string }) => {
+    if (!editMemory) return;
+    updateMut.mutate(
+      {
+        memoryId: editMemory.id,
+        payload: { content: payload.content, memory_type: payload.memory_type },
+      },
+      {
+        onSuccess: () => setEditMemory(null),
+      },
+    );
+  };
+
+  const handleDelete = (memory: AgentMemory) => {
+    if (window.confirm(t('agentMemory.deleteConfirm'))) {
+      deleteMut.mutate(memory.id);
+    }
+  };
+
+  const items = isSearching
+    ? searchQuery_.data?.items ?? []
+    : listQuery.data?.items ?? [];
+  const isLoading = isSearching ? searchQuery_.isLoading : listQuery.isLoading;
+  const isError = isSearching ? searchQuery_.isError : listQuery.isError;
+
+  return (
+    <div className="max-w-3xl mx-auto p-4 sm:p-6 space-y-4" data-testid="agent-memory-page">
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
+        <div className="flex items-center gap-2">
+          <Brain className="w-6 h-6 text-primary-600" aria-hidden="true" />
+          <h1 className="text-2xl font-bold text-secondary-900 dark:text-secondary-100">
+            {t('agentMemory.title')}
+          </h1>
+        </div>
+        {canWrite && agentId && (
+          <Button onClick={() => setShowCreate(true)} data-testid="memory-create-open">
+            <Plus className="w-4 h-4 mr-2" aria-hidden="true" />
+            {t('agentMemory.create')}
+          </Button>
+        )}
+      </div>
+
+      {/* Agent picker (required — backend filters by agent_id) */}
+      <div className="flex items-start gap-2">
+        <Bot className="w-4 h-4 text-secondary-500 mt-3" aria-hidden="true" />
+        <div className="flex-1">
+          <Select
+            label={t('agentMemory.agentLabel')}
+            options={agentOptions}
+            value={agentId}
+            onChange={(e) => {
+              setAgentId(e.target.value);
+              setActiveSearchQuery('');
+            }}
+            required
+            placeholder={t('agentMemory.agentPlaceholder')}
+          />
+        </div>
+      </div>
+
+      {agentsLoading && (
+        <p className="text-xs text-secondary-500" data-testid="agent-memory-agents-loading">
+          {t('agentMemory.loadingAgents')}
+        </p>
+      )}
+
+      {/* Semantic search */}
+      {agentId && (
+        <div className="flex gap-2">
+          <div className="relative flex-1">
+            <Search
+              className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-secondary-400"
+              aria-hidden="true"
+            />
+            <Input
+              value={searchQuery}
+              onChange={(e) => setSearchQuery(e.target.value)}
+              onKeyDown={(e) => {
+                if (e.key === 'Enter') setActiveSearchQuery(searchQuery.trim());
+              }}
+              placeholder={t('agentMemory.searchPlaceholder')}
+              className="pl-9"
+              aria-label={t('agentMemory.searchPlaceholder')}
+              data-testid="memory-search"
+            />
+          </div>
+          <Button
+            variant="secondary"
+            onClick={() => setActiveSearchQuery(searchQuery.trim())}
+            disabled={!searchQuery.trim()}
+            data-testid="memory-search-btn"
+          >
+            {t('agentMemory.search')}
+          </Button>
+          {isSearching && (
+            <Button
+              variant="ghost"
+              onClick={() => {
+                setActiveSearchQuery('');
+                setSearchQuery('');
+              }}
+              data-testid="memory-search-clear"
+            >
+              {t('agentMemory.clearSearch')}
+            </Button>
+          )}
+        </div>
+      )}
+
+      {isSearching && !isLoading && (
+        <p className="text-xs text-secondary-500" data-testid="memory-search-info">
+          {t('agentMemory.searchResults', { count: items.length })}
+        </p>
+      )}
+
+      {isLoading && (
+        <div className="flex items-center justify-center min-h-[30vh]" role="status" data-testid="agent-memory-loading">
+          <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-primary-500" aria-hidden="true" />
+        </div>
+      )}
+
+      {isError && (
+        <Card className="p-6 flex items-center gap-3 text-danger-600" data-testid="agent-memory-error">
+          <AlertTriangle className="w-5 h-5" aria-hidden="true" />
+          <span>{t('agentMemory.loadError')}</span>
+        </Card>
+      )}
+
+      {!isLoading && !isError && agentId && items.length === 0 && (
+        <Card className="p-8 flex flex-col items-center gap-3 text-secondary-500" data-testid="agent-memory-empty">
+          <Inbox className="w-10 h-10" aria-hidden="true" />
+          <p>{isSearching ? t('agentMemory.noSearchResults') : t('agentMemory.empty')}</p>
+        </Card>
+      )}
+
+      {!agentId && !agentsLoading && agentOptions.length > 0 && (
+        <Card className="p-8 flex flex-col items-center gap-3 text-secondary-500" data-testid="agent-memory-pick-agent">
+          <Bot className="w-10 h-10" aria-hidden="true" />
+          <p>{t('agentMemory.pickAgent')}</p>
+        </Card>
+      )}
+
+      <div className="space-y-3">
+        {items.map((memory) => (
+          <MemoryCard
+            key={memory.id}
+            memory={memory}
+            canWrite={canWrite}
+            onEdit={setEditMemory}
+            onDelete={handleDelete}
+            isMutating={isMutating}
+          />
+        ))}
+      </div>
+
+      <MemoryFormDialog
+        open={showCreate}
+        agentId={agentId}
+        memory={null}
+        onClose={() => setShowCreate(false)}
+        onSubmit={handleCreate}
+        isSubmitting={createMut.isPending}
+      />
+      <MemoryFormDialog
+        open={!!editMemory}
+        agentId={agentId}
+        memory={editMemory}
+        onClose={() => setEditMemory(null)}
+        onSubmit={handleEdit}
+        isSubmitting={updateMut.isPending}
+      />
+    </div>
+  );
+}
+
+export default AgentMemoryPage;