diff --git a/apps/x/apps/renderer/src/App.tsx b/apps/x/apps/renderer/src/App.tsx
index 09c0b494..558e19e3 100644
--- a/apps/x/apps/renderer/src/App.tsx
+++ b/apps/x/apps/renderer/src/App.tsx
@@ -5,7 +5,7 @@ import { RunEvent, ListRunsResponse } from '@x/shared/src/runs.js';
 import type { LanguageModelUsage, ToolUIPart } from 'ai';
 import './App.css'
 import z from 'zod';
-import { CheckIcon, LoaderIcon, PanelLeftIcon, Maximize2, Minimize2, ChevronLeftIcon, ChevronRightIcon, SquarePen, HistoryIcon } from 'lucide-react';
+import { CheckIcon, LoaderIcon, PanelLeftIcon, Maximize2, Minimize2, ChevronLeftIcon, ChevronRightIcon, SquarePen, SearchIcon, HistoryIcon } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import { MarkdownEditor, type MarkdownEditorHandle } from './components/markdown-editor';
 import { ChatSidebar } from './components/chat-sidebar';
@@ -25,6 +25,7 @@ import { SuggestedTopicsView } from '@/components/suggested-topics-view';
 import { LiveNotesView } from '@/components/live-notes-view';
 import { BgTasksView } from '@/components/bg-tasks-view';
 import { EmailView } from '@/components/email-view';
+import { WorkspaceView } from '@/components/workspace-view';
 import { MeetingsView } from '@/components/meetings-view';
 import { SidebarSectionProvider } from '@/contexts/sidebar-context';
 import {
@@ -182,6 +183,8 @@ const MEETINGS_TAB_PATH = '__rowboat_meetings__'
 const LIVE_NOTES_TAB_PATH = '__rowboat_live_notes__'
 const BG_TASKS_TAB_PATH = '__rowboat_bg_tasks__'
 const EMAIL_TAB_PATH = '__rowboat_email__'
+const WORKSPACE_TAB_PATH = '__rowboat_workspace__'
+const WORKSPACE_ROOT = 'knowledge/Workspace'
 const BASES_DEFAULT_TAB_PATH = '__rowboat_bases_default__'
 
 const clampNumber = (value: number, min: number, max: number) =>
@@ -315,6 +318,7 @@ const isMeetingsTabPath = (path: string) => path === MEETINGS_TAB_PATH
 const isLiveNotesTabPath = (path: string) => path === LIVE_NOTES_TAB_PATH
 const isBgTasksTabPath = (path: string) => path === BG_TASKS_TAB_PATH
 const isEmailTabPath = (path: string) => path === EMAIL_TAB_PATH
+const isWorkspaceTabPath = (path: string) => path === WORKSPACE_TAB_PATH
 const isBaseFilePath = (path: string) => path.endsWith('.base') || path === BASES_DEFAULT_TAB_PATH
 
 const getSuggestedTopicTargetFolder = (category?: string) => {
@@ -565,12 +569,14 @@ type ViewState =
   | { type: 'meetings' }
   | { type: 'live-notes' }
   | { type: 'email' }
+  | { type: 'workspace'; path?: string }
 
 function viewStatesEqual(a: ViewState, b: ViewState): boolean {
   if (a.type !== b.type) return false
   if (a.type === 'chat' && b.type === 'chat') return a.runId === b.runId
   if (a.type === 'file' && b.type === 'file') return a.path === b.path
   if (a.type === 'task' && b.type === 'task') return a.name === b.name
+  if (a.type === 'workspace' && b.type === 'workspace') return (a.path ?? '') === (b.path ?? '')
   return true // both graph
 }
 
@@ -614,6 +620,10 @@ function parseDeepLink(input: string): ViewState | null {
       return { type: 'meetings' }
     case 'live-notes':
       return { type: 'live-notes' }
+    case 'workspace': {
+      const path = params.get('path')
+      return { type: 'workspace', path: path ?? undefined }
+    }
     default:
       return null
   }
@@ -623,9 +633,11 @@ function parseDeepLink(input: string): ViewState | null {
 function FixedSidebarToggle({
   leftInsetPx,
   onNewChat,
+  onOpenSearch,
 }: {
   leftInsetPx: number
   onNewChat?: () => void
+  onOpenSearch?: () => void
 }) {
   const { toggleSidebar } = useSidebar()
   return (
@@ -652,6 +664,17 @@ function FixedSidebarToggle({
           <SquarePen className="size-5" />
         </button>
       )}
+      {onOpenSearch && (
+        <button
+          type="button"
+          onClick={onOpenSearch}
+          className="flex h-8 w-8 items-center justify-center rounded-md text-muted-foreground hover:bg-accent hover:text-foreground transition-colors"
+          aria-label="Search"
+          title="Search"
+        >
+          <SearchIcon className="size-5" />
+        </button>
+      )}
     </div>
   )
 }
@@ -736,6 +759,8 @@ function App() {
   const [isLiveNotesOpen, setIsLiveNotesOpen] = useState(false)
   const [isBgTasksOpen, setIsBgTasksOpen] = useState(false)
   const [isEmailOpen, setIsEmailOpen] = useState(false)
+  const [isWorkspaceOpen, setIsWorkspaceOpen] = useState(false)
+  const [workspaceInitialPath, setWorkspaceInitialPath] = useState<string | null>(null)
   const [expandedFrom, setExpandedFrom] = useState<{
     path: string | null
     graph: boolean
@@ -1072,6 +1097,7 @@ function App() {
     if (isLiveNotesTabPath(tab.path)) return 'Live notes'
     if (isBgTasksTabPath(tab.path)) return 'Background tasks'
     if (isEmailTabPath(tab.path)) return 'Email'
+    if (isWorkspaceTabPath(tab.path)) return 'Workspace'
     if (tab.path === BASES_DEFAULT_TAB_PATH) return 'Bases'
     if (tab.path.endsWith('.base')) return tab.path.split('/').pop()?.replace(/\.base$/i, '') || 'Base'
     return tab.path.split('/').pop()?.replace(/\.md$/i, '') || tab.path
@@ -2784,7 +2810,7 @@ function App() {
       setActiveFileTabId(existingTab.id)
       setIsGraphOpen(false)
       setIsSuggestedTopicsOpen(false)
-      setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+      setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
       setSelectedPath(path)
       return
     }
@@ -2793,7 +2819,7 @@ function App() {
     setActiveFileTabId(id)
     setIsGraphOpen(false)
     setIsSuggestedTopicsOpen(false)
-    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
     setSelectedPath(path)
   }, [fileTabs, dismissBrowserOverlay])
 
@@ -2812,14 +2838,14 @@ function App() {
       setSelectedPath(null)
       setIsGraphOpen(true)
       setIsSuggestedTopicsOpen(false)
-      setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+      setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
       return
     }
     if (isSuggestedTopicsTabPath(tab.path)) {
       setSelectedPath(null)
       setIsGraphOpen(false)
       setIsSuggestedTopicsOpen(true)
-      setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+      setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
       return
     }
     if (isLiveNotesTabPath(tab.path)) {
@@ -2829,6 +2855,7 @@ function App() {
       setIsMeetingsOpen(false)
       setIsBgTasksOpen(false)
       setIsEmailOpen(false)
+      setIsWorkspaceOpen(false)
       setIsLiveNotesOpen(true)
       return
     }
@@ -2838,6 +2865,8 @@ function App() {
       setIsSuggestedTopicsOpen(false)
       setIsMeetingsOpen(false)
       setIsLiveNotesOpen(false)
+      setIsEmailOpen(false)
+      setIsWorkspaceOpen(false)
       setIsBgTasksOpen(true)
       return
     }
@@ -2848,26 +2877,41 @@ function App() {
       setIsMeetingsOpen(true)
       setIsLiveNotesOpen(false)
       setIsBgTasksOpen(false)
+      setIsEmailOpen(false)
+      setIsWorkspaceOpen(false)
       return
     }
     if (isEmailTabPath(tab.path)) {
       setSelectedPath(null)
       setIsGraphOpen(false)
       setIsSuggestedTopicsOpen(false)
+      setIsMeetingsOpen(false)
       setIsLiveNotesOpen(false)
       setIsBgTasksOpen(false)
+      setIsWorkspaceOpen(false)
       setIsEmailOpen(true)
       return
     }
+    if (isWorkspaceTabPath(tab.path)) {
+      setSelectedPath(null)
+      setIsGraphOpen(false)
+      setIsSuggestedTopicsOpen(false)
+      setIsMeetingsOpen(false)
+      setIsLiveNotesOpen(false)
+      setIsBgTasksOpen(false)
+      setIsEmailOpen(false)
+      setIsWorkspaceOpen(true)
+      return
+    }
     setIsGraphOpen(false)
     setIsSuggestedTopicsOpen(false)
-    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
     setSelectedPath(tab.path)
   }, [fileTabs, isRightPaneMaximized, dismissBrowserOverlay])
 
   const closeFileTab = useCallback((tabId: string) => {
     const closingTab = fileTabs.find(t => t.id === tabId)
-    if (closingTab && !isGraphTabPath(closingTab.path) && !isSuggestedTopicsTabPath(closingTab.path) && !isLiveNotesTabPath(closingTab.path) && !isBgTasksTabPath(closingTab.path) && !isEmailTabPath(closingTab.path) && !isBaseFilePath(closingTab.path)) {
+    if (closingTab && !isGraphTabPath(closingTab.path) && !isSuggestedTopicsTabPath(closingTab.path) && !isLiveNotesTabPath(closingTab.path) && !isBgTasksTabPath(closingTab.path) && !isEmailTabPath(closingTab.path) && !isWorkspaceTabPath(closingTab.path) && !isBaseFilePath(closingTab.path)) {
       removeEditorCacheForPath(closingTab.path)
       initialContentByPathRef.current.delete(closingTab.path)
       untitledRenameReadyPathsRef.current.delete(closingTab.path)
@@ -2890,7 +2934,7 @@ function App() {
         setSelectedPath(null)
         setIsGraphOpen(false)
         setIsSuggestedTopicsOpen(false)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
           return []
       }
       const idx = prev.findIndex(t => t.id === tabId)
@@ -2904,12 +2948,12 @@ function App() {
           setSelectedPath(null)
           setIsGraphOpen(true)
           setIsSuggestedTopicsOpen(false)
-          setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+          setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
         } else if (isSuggestedTopicsTabPath(newActiveTab.path)) {
           setSelectedPath(null)
           setIsGraphOpen(false)
           setIsSuggestedTopicsOpen(true)
-          setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+          setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
         } else if (isMeetingsTabPath(newActiveTab.path)) {
           setSelectedPath(null)
           setIsGraphOpen(false)
@@ -2918,6 +2962,7 @@ function App() {
           setIsLiveNotesOpen(false)
           setIsBgTasksOpen(false)
           setIsEmailOpen(false)
+          setIsWorkspaceOpen(false)
         } else if (isLiveNotesTabPath(newActiveTab.path)) {
           setSelectedPath(null)
           setIsGraphOpen(false)
@@ -2925,6 +2970,7 @@ function App() {
           setIsMeetingsOpen(false)
           setIsBgTasksOpen(false)
           setIsEmailOpen(false)
+          setIsWorkspaceOpen(false)
           setIsLiveNotesOpen(true)
         } else if (isBgTasksTabPath(newActiveTab.path)) {
           setSelectedPath(null)
@@ -2934,6 +2980,7 @@ function App() {
           setIsLiveNotesOpen(false)
           setIsBgTasksOpen(true)
           setIsEmailOpen(false)
+          setIsWorkspaceOpen(false)
         } else if (isEmailTabPath(newActiveTab.path)) {
           setSelectedPath(null)
           setIsGraphOpen(false)
@@ -2941,11 +2988,21 @@ function App() {
           setIsMeetingsOpen(false)
           setIsLiveNotesOpen(false)
           setIsBgTasksOpen(false)
+          setIsWorkspaceOpen(false)
           setIsEmailOpen(true)
+        } else if (isWorkspaceTabPath(newActiveTab.path)) {
+          setSelectedPath(null)
+          setIsGraphOpen(false)
+          setIsSuggestedTopicsOpen(false)
+          setIsMeetingsOpen(false)
+          setIsLiveNotesOpen(false)
+          setIsBgTasksOpen(false)
+          setIsEmailOpen(false)
+          setIsWorkspaceOpen(true)
         } else {
           setIsGraphOpen(false)
           setIsSuggestedTopicsOpen(false)
-          setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+          setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
               setSelectedPath(newActiveTab.path)
         }
       }
@@ -2976,7 +3033,7 @@ function App() {
     dismissBrowserOverlay()
     handleNewChat()
     // Left-pane "new chat" should always open full chat view.
-    if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen) {
+    if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen) {
       setExpandedFrom({
         path: selectedPath,
         graph: isGraphOpen,
@@ -2993,8 +3050,8 @@ function App() {
     setSelectedPath(null)
     setIsGraphOpen(false)
     setIsSuggestedTopicsOpen(false)
-    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
-  }, [chatTabs, activeChatTabId, dismissBrowserOverlay, handleNewChat, selectedPath, isGraphOpen, isSuggestedTopicsOpen, isMeetingsOpen, isLiveNotesOpen, isBgTasksOpen, isEmailOpen])
+    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
+  }, [chatTabs, activeChatTabId, dismissBrowserOverlay, handleNewChat, selectedPath, isGraphOpen, isSuggestedTopicsOpen, isMeetingsOpen, isLiveNotesOpen, isBgTasksOpen, isEmailOpen, isWorkspaceOpen])
 
   // Sidebar variant: create/switch chat tab without leaving file/graph context.
   const handleNewChatTabInSidebar = useCallback(() => {
@@ -3126,7 +3183,7 @@ function App() {
 
   const handleOpenFullScreenChat = useCallback(() => {
     // Remember where we came from so the close button can return
-    if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen) {
+    if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen) {
       setExpandedFrom({
         path: selectedPath,
         graph: isGraphOpen,
@@ -3142,19 +3199,19 @@ function App() {
     setSelectedPath(null)
     setIsGraphOpen(false)
     setIsSuggestedTopicsOpen(false)
-    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
-  }, [selectedPath, isGraphOpen, isSuggestedTopicsOpen, isMeetingsOpen, isLiveNotesOpen, isBgTasksOpen, isEmailOpen, dismissBrowserOverlay])
+    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
+  }, [selectedPath, isGraphOpen, isSuggestedTopicsOpen, isMeetingsOpen, isLiveNotesOpen, isBgTasksOpen, isEmailOpen, isWorkspaceOpen, dismissBrowserOverlay])
 
   const handleCloseFullScreenChat = useCallback(() => {
     if (expandedFrom) {
       if (expandedFrom.graph) {
         setIsGraphOpen(true)
         setIsSuggestedTopicsOpen(false)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
       } else if (expandedFrom.suggestedTopics) {
         setIsGraphOpen(false)
         setIsSuggestedTopicsOpen(true)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
       } else if (expandedFrom.meetings) {
         setIsGraphOpen(false)
         setIsSuggestedTopicsOpen(false)
@@ -3186,7 +3243,7 @@ function App() {
       } else if (expandedFrom.path) {
         setIsGraphOpen(false)
         setIsSuggestedTopicsOpen(false)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
         setSelectedPath(expandedFrom.path)
       }
       setExpandedFrom(null)
@@ -3200,10 +3257,11 @@ function App() {
     if (isMeetingsOpen) return { type: 'meetings' }
     if (isLiveNotesOpen) return { type: 'live-notes' }
     if (isSuggestedTopicsOpen) return { type: 'suggested-topics' }
+    if (isWorkspaceOpen) return { type: 'workspace', path: workspaceInitialPath ?? undefined }
     if (selectedPath) return { type: 'file', path: selectedPath }
     if (isGraphOpen) return { type: 'graph' }
     return { type: 'chat', runId }
-  }, [selectedBackgroundTask, isEmailOpen, isMeetingsOpen, isLiveNotesOpen, isBgTasksOpen, isSuggestedTopicsOpen, selectedPath, isGraphOpen, runId])
+  }, [selectedBackgroundTask, isEmailOpen, isMeetingsOpen, isLiveNotesOpen, isBgTasksOpen, isSuggestedTopicsOpen, selectedPath, isGraphOpen, isWorkspaceOpen, workspaceInitialPath, runId])
 
   const appendUnique = useCallback((stack: ViewState[], entry: ViewState) => {
     const last = stack[stack.length - 1]
@@ -3304,6 +3362,17 @@ function App() {
     setActiveFileTabId(id)
   }, [fileTabs])
 
+  const ensureWorkspaceFileTab = useCallback(() => {
+    const existing = fileTabs.find((tab) => isWorkspaceTabPath(tab.path))
+    if (existing) {
+      setActiveFileTabId(existing.id)
+      return
+    }
+    const id = newFileTabId()
+    setFileTabs((prev) => [...prev, { id, path: WORKSPACE_TAB_PATH }])
+    setActiveFileTabId(id)
+  }, [fileTabs])
+
   const openEmailView = useCallback(() => {
     setSelectedPath(null)
     setIsGraphOpen(false)
@@ -3312,6 +3381,7 @@ function App() {
     setIsMeetingsOpen(false)
     setIsLiveNotesOpen(false)
     setIsBgTasksOpen(false)
+    setIsWorkspaceOpen(false)
     setSelectedBackgroundTask(null)
     setExpandedFrom(null)
     setIsRightPaneMaximized(false)
@@ -3324,7 +3394,7 @@ function App() {
     setIsGraphOpen(false)
     setIsBrowserOpen(false)
     setIsSuggestedTopicsOpen(false)
-    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+    setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
     setSelectedBackgroundTask(null)
     setExpandedFrom(null)
     setIsRightPaneMaximized(false)
@@ -3341,6 +3411,7 @@ function App() {
     setIsLiveNotesOpen(false)
     setIsBgTasksOpen(false)
     setIsEmailOpen(false)
+    setIsWorkspaceOpen(false)
     setSelectedBackgroundTask(null)
     setExpandedFrom(null)
     setIsRightPaneMaximized(false)
@@ -3356,7 +3427,7 @@ function App() {
         // visible in the middle pane.
         setIsBrowserOpen(false)
         setIsSuggestedTopicsOpen(false)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
         setExpandedFrom(null)
         // Preserve split vs knowledge-max mode when navigating knowledge files.
         // Only exit chat-only maximize, because that would hide the selected file.
@@ -3371,7 +3442,7 @@ function App() {
         setSelectedPath(null)
         setIsBrowserOpen(false)
         setIsSuggestedTopicsOpen(false)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
         setExpandedFrom(null)
         setIsGraphOpen(true)
         ensureGraphFileTab()
@@ -3384,7 +3455,7 @@ function App() {
         setIsGraphOpen(false)
         setIsBrowserOpen(false)
         setIsSuggestedTopicsOpen(false)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
         setExpandedFrom(null)
         setIsRightPaneMaximized(false)
         setSelectedBackgroundTask(view.name)
@@ -3397,7 +3468,7 @@ function App() {
         setIsRightPaneMaximized(false)
         setSelectedBackgroundTask(null)
         setIsSuggestedTopicsOpen(true)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
         ensureSuggestedTopicsFileTab()
         return
       case 'meetings':
@@ -3412,6 +3483,7 @@ function App() {
         setIsLiveNotesOpen(false)
         setIsBgTasksOpen(false)
         setIsEmailOpen(false)
+        setIsWorkspaceOpen(false)
         ensureMeetingsFileTab()
         return
       case 'live-notes':
@@ -3425,6 +3497,7 @@ function App() {
         setIsMeetingsOpen(false)
         setIsBgTasksOpen(false)
         setIsEmailOpen(false)
+        setIsWorkspaceOpen(false)
         setIsLiveNotesOpen(true)
         ensureLiveNotesFileTab()
         return
@@ -3440,8 +3513,25 @@ function App() {
         setIsLiveNotesOpen(false)
         setIsBgTasksOpen(false)
         setIsEmailOpen(true)
+        setIsWorkspaceOpen(false)
         ensureEmailFileTab()
         return
+      case 'workspace':
+        setSelectedPath(null)
+        setIsGraphOpen(false)
+        setIsBrowserOpen(false)
+        setExpandedFrom(null)
+        setIsRightPaneMaximized(false)
+        setSelectedBackgroundTask(null)
+        setIsSuggestedTopicsOpen(false)
+        setIsMeetingsOpen(false)
+        setIsLiveNotesOpen(false)
+        setIsBgTasksOpen(false)
+        setIsEmailOpen(false)
+        setIsWorkspaceOpen(true)
+        setWorkspaceInitialPath(view.path ?? null)
+        ensureWorkspaceFileTab()
+        return
       case 'chat':
         setSelectedPath(null)
         setIsGraphOpen(false)
@@ -3450,7 +3540,7 @@ function App() {
         setIsRightPaneMaximized(false)
         setSelectedBackgroundTask(null)
         setIsSuggestedTopicsOpen(false)
-        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false)
+        setIsMeetingsOpen(false); setIsLiveNotesOpen(false); setIsBgTasksOpen(false); setIsEmailOpen(false); setIsWorkspaceOpen(false)
         if (view.runId) {
           await loadRun(view.runId)
         } else {
@@ -3458,7 +3548,7 @@ function App() {
         }
         return
     }
-  }, [ensureEmailFileTab, ensureMeetingsFileTab, ensureLiveNotesFileTab, ensureFileTabForPath, ensureGraphFileTab, ensureSuggestedTopicsFileTab, handleNewChat, isRightPaneMaximized, loadRun])
+  }, [ensureEmailFileTab, ensureMeetingsFileTab, ensureLiveNotesFileTab, ensureFileTabForPath, ensureGraphFileTab, ensureSuggestedTopicsFileTab, ensureWorkspaceFileTab, handleNewChat, isRightPaneMaximized, loadRun])
 
   const navigateToView = useCallback(async (nextView: ViewState) => {
     const current = currentViewState
@@ -3780,7 +3870,7 @@ function App() {
   }, [])
 
   // Keyboard shortcut: Ctrl+L to toggle main chat view
-  const isFullScreenChat = !selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !selectedBackgroundTask && !isBrowserOpen
+  const isFullScreenChat = !selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isWorkspaceOpen && !selectedBackgroundTask && !isBrowserOpen
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
       if ((e.ctrlKey || e.metaKey) && e.key === 'l') {
@@ -3865,11 +3955,11 @@ function App() {
     const handleTabKeyDown = (e: KeyboardEvent) => {
       const mod = e.metaKey || e.ctrlKey
       if (!mod) return
-      const rightPaneAvailable = Boolean((selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen) && isChatSidebarOpen)
+      const rightPaneAvailable = Boolean((selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen) && isChatSidebarOpen)
       const targetPane: ShortcutPane = rightPaneAvailable
         ? (isRightPaneMaximized ? 'right' : activeShortcutPane)
         : 'left'
-      const inFileView = targetPane === 'left' && Boolean(selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen)
+      const inFileView = targetPane === 'left' && Boolean(selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen)
       const selectedKnowledgePath = isGraphOpen
         ? GRAPH_TAB_PATH
         : isSuggestedTopicsOpen
@@ -3882,6 +3972,8 @@ function App() {
             ? BG_TASKS_TAB_PATH
           : isEmailOpen
             ? EMAIL_TAB_PATH
+          : isWorkspaceOpen
+            ? WORKSPACE_TAB_PATH
           : selectedPath
       const targetFileTabId = activeFileTabId ?? (
         selectedKnowledgePath
@@ -3936,7 +4028,7 @@ function App() {
     }
     document.addEventListener('keydown', handleTabKeyDown)
     return () => document.removeEventListener('keydown', handleTabKeyDown)
-  }, [selectedPath, isGraphOpen, isSuggestedTopicsOpen, isMeetingsOpen, isLiveNotesOpen, isBgTasksOpen, isEmailOpen, isChatSidebarOpen, isRightPaneMaximized, activeShortcutPane, chatTabs, fileTabs, activeChatTabId, activeFileTabId, closeChatTab, closeFileTab, switchChatTab, switchFileTab])
+  }, [selectedPath, isGraphOpen, isSuggestedTopicsOpen, isMeetingsOpen, isLiveNotesOpen, isBgTasksOpen, isEmailOpen, isWorkspaceOpen, isChatSidebarOpen, isRightPaneMaximized, activeShortcutPane, chatTabs, fileTabs, activeChatTabId, activeFileTabId, closeChatTab, closeFileTab, switchChatTab, switchFileTab])
 
   const toggleExpand = (path: string, kind: 'file' | 'dir') => {
     if (kind === 'file') {
@@ -3961,7 +4053,7 @@ function App() {
           }),
         },
       }))
-      if (!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !selectedBackgroundTask) {
+      if (!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isWorkspaceOpen && !selectedBackgroundTask) {
         setIsChatSidebarOpen(false)
         setIsRightPaneMaximized(false)
       }
@@ -4087,19 +4179,42 @@ function App() {
     },
     openGraph: () => {
       // From chat-only landing state, open graph directly in full knowledge view.
-      if (!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !selectedBackgroundTask) {
+      if (!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isWorkspaceOpen && !selectedBackgroundTask) {
         setIsChatSidebarOpen(false)
         setIsRightPaneMaximized(false)
       }
       void navigateToView({ type: 'graph' })
     },
     openBases: () => {
-      if (!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !selectedBackgroundTask) {
+      if (!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isWorkspaceOpen && !selectedBackgroundTask) {
         setIsChatSidebarOpen(false)
         setIsRightPaneMaximized(false)
       }
       void navigateToView({ type: 'file', path: BASES_DEFAULT_TAB_PATH })
     },
+    openWorkspaceAt: (path?: string) => {
+      if (!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isWorkspaceOpen && !selectedBackgroundTask) {
+        setIsChatSidebarOpen(false)
+        setIsRightPaneMaximized(false)
+      }
+      void navigateToView({ type: 'workspace', path })
+    },
+    createWorkspace: async (name: string): Promise<string> => {
+      const trimmed = name.trim()
+      if (!trimmed) throw new Error('Name is required')
+      if (trimmed.includes('/')) throw new Error('Name cannot contain "/"')
+      const rootExists = await window.ipc.invoke('workspace:exists', { path: WORKSPACE_ROOT })
+      if (!rootExists.exists) {
+        await window.ipc.invoke('workspace:mkdir', { path: WORKSPACE_ROOT, recursive: true })
+      }
+      const target = `${WORKSPACE_ROOT}/${trimmed}`
+      const exists = await window.ipc.invoke('workspace:exists', { path: target })
+      if (exists.exists) {
+        throw new Error(`A workspace named "${trimmed}" already exists`)
+      }
+      await window.ipc.invoke('workspace:mkdir', { path: target, recursive: true })
+      return target
+    },
     expandAll: () => setExpandedPaths(new Set(collectDirPaths(tree))),
     collapseAll: () => setExpandedPaths(new Set()),
     rename: async (oldPath: string, newName: string, isDir: boolean) => {
@@ -4690,7 +4805,7 @@ function App() {
   const selectedTask = selectedBackgroundTask
     ? backgroundTasks.find(t => t.name === selectedBackgroundTask)
     : null
-  const isRightPaneContext = Boolean(selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isBrowserOpen)
+  const isRightPaneContext = Boolean(selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen || isBrowserOpen)
   const isRightPaneOnlyMode = isRightPaneContext && isChatSidebarOpen && isRightPaneMaximized
   const shouldCollapseLeftPane = isRightPaneOnlyMode
   const openMarkdownTabs = React.useMemo(() => {
@@ -4707,7 +4822,7 @@ function App() {
   return (
     <TooltipProvider delayDuration={0}>
       <SidebarSectionProvider defaultSection="tasks" onSectionChange={(section) => {
-        if (section === 'knowledge' && !selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen) {
+        if (section === 'knowledge' && !selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isWorkspaceOpen) {
           void navigateToView({ type: 'file', path: BASES_DEFAULT_TAB_PATH })
         }
       }}>
@@ -4740,7 +4855,7 @@ function App() {
                 onNewChat: handleNewChatTab,
                 onSelectRun: (runIdToLoad) => {
                   cancelRecordingIfActive()
-                  if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isBrowserOpen) {
+                  if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen || isBrowserOpen) {
                     setIsChatSidebarOpen(true)
                   }
 
@@ -4751,7 +4866,7 @@ function App() {
                     return
                   }
                   // In two-pane mode (file/graph/browser), keep the middle pane and just swap chat context in the right sidebar.
-                  if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isBrowserOpen) {
+                  if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen || isBrowserOpen) {
                     setChatTabs(prev => prev.map(t => t.id === activeChatTabId ? { ...t, runId: runIdToLoad } : t))
                     loadRun(runIdToLoad)
                     return
@@ -4775,14 +4890,14 @@ function App() {
                       } else {
                         // Only one tab, reset it to new chat
                         setChatTabs([{ id: tabForRun.id, runId: null }])
-                        if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isBrowserOpen) {
+                        if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen || isBrowserOpen) {
                           handleNewChat()
                         } else {
                           void navigateToView({ type: 'chat', runId: null })
                         }
                       }
                     } else if (runId === runIdToDelete) {
-                      if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isBrowserOpen) {
+                      if (selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen || isBrowserOpen) {
                         setChatTabs(prev => prev.map(t => t.id === activeChatTabId ? { ...t, runId: null } : t))
                         handleNewChat()
                       } else {
@@ -4800,8 +4915,6 @@ function App() {
               }}
               backgroundTasks={backgroundTasks}
               selectedBackgroundTask={selectedBackgroundTask}
-              onNewChat={handleNewChatTab}
-              onOpenSearch={() => setIsSearchOpen(true)}
               isSearchOpen={isSearchOpen}
               isBrowserOpen={isBrowserOpen}
               onToggleBrowser={handleToggleBrowser}
@@ -4809,8 +4922,6 @@ function App() {
               onOpenSuggestedTopics={() => void navigateToView({ type: 'suggested-topics' })}
               isMeetingsOpen={isMeetingsOpen}
               onOpenMeetings={openMeetingsView}
-              isLiveNotesOpen={isLiveNotesOpen}
-              onOpenLiveNotes={() => void navigateToView({ type: 'live-notes' })}
               isBgTasksOpen={isBgTasksOpen}
               onOpenBgTasks={openBgTasksView}
               isEmailOpen={isEmailOpen}
@@ -4834,7 +4945,7 @@ function App() {
                 canNavigateForward={canNavigateForward}
                 collapsedLeftPaddingPx={collapsedLeftPaddingPx}
               >
-                {(selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen) && fileTabs.length >= 1 ? (
+                {(selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen) && fileTabs.length >= 1 ? (
                   <TabBar
                     tabs={fileTabs}
                     activeTabId={activeFileTabId ?? ''}
@@ -4842,7 +4953,7 @@ function App() {
                     getTabId={(t) => t.id}
                     onSwitchTab={switchFileTab}
                     onCloseTab={closeFileTab}
-                    allowSingleTabClose={fileTabs.length === 1 && (isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || (selectedPath != null && isBaseFilePath(selectedPath)))}
+                    allowSingleTabClose={fileTabs.length === 1 && (isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen || (selectedPath != null && isBaseFilePath(selectedPath)))}
                   />
                 ) : (
                   <TabBar
@@ -4895,7 +5006,7 @@ function App() {
                     <TooltipContent side="bottom">Version history</TooltipContent>
                   </Tooltip>
                 )}
-                {!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !selectedTask && !isBrowserOpen && (
+                {!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isWorkspaceOpen && !selectedTask && !isBrowserOpen && (
                   <Tooltip>
                     <TooltipTrigger asChild>
                       <button
@@ -4910,7 +5021,7 @@ function App() {
                     <TooltipContent side="bottom">New chat tab</TooltipContent>
                   </Tooltip>
                 )}
-                {!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isBrowserOpen && expandedFrom && (
+                {!selectedPath && !isGraphOpen && !isSuggestedTopicsOpen && !isMeetingsOpen && !isLiveNotesOpen && !isBgTasksOpen && !isEmailOpen && !isWorkspaceOpen && !isBrowserOpen && expandedFrom && (
                   <Tooltip>
                     <TooltipTrigger asChild>
                       <button
@@ -4925,7 +5036,7 @@ function App() {
                     <TooltipContent side="bottom">Restore two-pane view</TooltipContent>
                   </Tooltip>
                 )}
-                {(selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen) && (
+                {(selectedPath || isGraphOpen || isSuggestedTopicsOpen || isMeetingsOpen || isLiveNotesOpen || isBgTasksOpen || isEmailOpen || isWorkspaceOpen) && (
                   <Tooltip>
                     <TooltipTrigger asChild>
                       <button
@@ -4991,6 +5102,15 @@ function App() {
                 <div className="flex-1 min-h-0 flex flex-col overflow-hidden">
                   <EmailView />
                 </div>
+              ) : isWorkspaceOpen ? (
+                <div className="flex-1 min-h-0 flex flex-col overflow-hidden">
+                  <WorkspaceView
+                    tree={tree}
+                    initialPath={workspaceInitialPath}
+                    onOpenNote={(path) => navigateToFile(path)}
+                    onCreateWorkspace={async (name) => { await knowledgeActions.createWorkspace(name) }}
+                  />
+                </div>
               ) : selectedPath && isBaseFilePath(selectedPath) ? (
                 <div className="flex-1 min-h-0 flex flex-col overflow-hidden">
                   <BasesView
@@ -5414,6 +5534,7 @@ function App() {
             <FixedSidebarToggle
               leftInsetPx={isMac ? MACOS_TRAFFIC_LIGHTS_RESERVED_PX : 0}
               onNewChat={handleNewChatTab}
+              onOpenSearch={() => setIsSearchOpen(true)}
             />
           </SidebarProvider>
         </div>
diff --git a/apps/x/apps/renderer/src/components/sidebar-content.tsx b/apps/x/apps/renderer/src/components/sidebar-content.tsx
index 88654f68..46e4093d 100644
--- a/apps/x/apps/renderer/src/components/sidebar-content.tsx
+++ b/apps/x/apps/renderer/src/components/sidebar-content.tsx
@@ -19,8 +19,7 @@ import {
   Mic,
   Network,
   Pencil,
-  Radio,
-  SearchIcon,
+  LayoutGrid,
   Table2,
   Plug,
   Lightbulb,
@@ -91,7 +90,6 @@ import {
 } from "@/components/ui/context-menu"
 import { Input } from "@/components/ui/input"
 import { cn } from "@/lib/utils"
-import { type ActiveSection, useSidebarSection } from "@/contexts/sidebar-context"
 import { ConnectorsPopover } from "@/components/connectors-popover"
 import { HelpPopover } from "@/components/help-popover"
 import { SettingsDialog } from "@/components/settings-dialog"
@@ -114,6 +112,8 @@ type KnowledgeActions = {
   createFolder: (parentPath?: string) => Promise<string>
   openGraph: () => void
   openBases: () => void
+  openWorkspaceAt: (path?: string) => void
+  createWorkspace: (name: string) => Promise<string>
   expandAll: () => void
   collapseAll: () => void
   rename: (path: string, newName: string, isDir: boolean) => Promise<void>
@@ -213,8 +213,6 @@ type SidebarContentPanelProps = {
   tasksActions?: TasksActions
   backgroundTasks?: BackgroundTaskItem[]
   selectedBackgroundTask?: string | null
-  onNewChat?: () => void
-  onOpenSearch?: () => void
   isSearchOpen?: boolean
   isBrowserOpen?: boolean
   onToggleBrowser?: () => void
@@ -222,19 +220,12 @@ type SidebarContentPanelProps = {
   onOpenSuggestedTopics?: () => void
   isMeetingsOpen?: boolean
   onOpenMeetings?: () => void
-  isLiveNotesOpen?: boolean
-  onOpenLiveNotes?: () => void
   isBgTasksOpen?: boolean
   onOpenBgTasks?: () => void
   isEmailOpen?: boolean
   onOpenEmail?: () => void
 } & React.ComponentProps<typeof Sidebar>
 
-const sectionTabs: { id: ActiveSection; label: string }[] = [
-  { id: "tasks", label: "Chat" },
-  { id: "knowledge", label: "Knowledge" },
-]
-
 function formatEventTime(ts: string): string {
   const date = new Date(ts)
   if (Number.isNaN(date.getTime())) return ""
@@ -474,8 +465,6 @@ export function SidebarContentPanel({
   tasksActions,
   backgroundTasks = [],
   selectedBackgroundTask,
-  onNewChat,
-  onOpenSearch,
   isSearchOpen = false,
   isBrowserOpen = false,
   onToggleBrowser,
@@ -483,15 +472,12 @@ export function SidebarContentPanel({
   onOpenSuggestedTopics,
   isMeetingsOpen = false,
   onOpenMeetings,
-  isLiveNotesOpen = false,
-  onOpenLiveNotes,
   isBgTasksOpen = false,
   onOpenBgTasks,
   isEmailOpen = false,
   onOpenEmail,
   ...props
 }: SidebarContentPanelProps) {
-  const { activeSection, setActiveSection } = useSidebarSection()
   const [hasOauthError, setHasOauthError] = useState(false)
   const [showOauthAlert, setShowOauthAlert] = useState(true)
   const [connectorsOpen, setConnectorsOpen] = useState(false)
@@ -504,7 +490,6 @@ export function SidebarContentPanel({
   const isBrowserQuickActionSelected = isBrowserOpen && !isSearchOpen
   const isSuggestedTopicsQuickActionSelected = isSuggestedTopicsOpen && !isBrowserOpen
   const isMeetingsQuickActionSelected = isMeetingsOpen && !isBrowserOpen
-  const isLiveNotesQuickActionSelected = isLiveNotesOpen && !isBrowserOpen
   const isBgTasksQuickActionSelected = isBgTasksOpen && !isBrowserOpen
   const isEmailQuickActionSelected = isEmailOpen && !isBrowserOpen
 
@@ -569,87 +554,8 @@ export function SidebarContentPanel({
       <SidebarHeader className="titlebar-drag-region">
         {/* Top spacer to clear the traffic lights + fixed toggle row */}
         <div className="h-8" />
-        {/* Tab switcher - centered below the traffic lights row */}
-        <div className="flex items-center px-2 py-1.5">
-          <div className="rowboat-section-switcher titlebar-no-drag flex w-full rounded-lg bg-sidebar-accent/50 p-0.5">
-            {sectionTabs.map((tab) => (
-              <button
-                key={tab.id}
-                onClick={() => setActiveSection(tab.id)}
-                className={cn(
-                  "flex-1 rounded-md px-3 py-1 text-sm font-medium transition-colors",
-                  activeSection === tab.id
-                    ? "bg-sidebar-accent text-sidebar-accent-foreground shadow-sm"
-                    : "text-sidebar-foreground/70 hover:text-sidebar-foreground"
-                )}
-              >
-                {tab.label}
-              </button>
-            ))}
-          </div>
-        </div>
         {/* Quick action buttons */}
         <div className="rowboat-quick-actions titlebar-no-drag flex flex-col gap-0.5 px-2 pb-1">
-          {onOpenSearch && (
-            <button
-              type="button"
-              onClick={onOpenSearch}
-              className={cn(
-                "flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-sm transition-colors",
-                isSearchOpen
-                  ? "bg-sidebar-accent text-sidebar-accent-foreground"
-                  : "text-sidebar-foreground/80 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground"
-              )}
-            >
-              <SearchIcon className="size-4" />
-              <span>Search</span>
-            </button>
-          )}
-          {onToggleBrowser && (
-            <button
-              type="button"
-              onClick={onToggleBrowser}
-              className={cn(
-                "flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-sm transition-colors",
-                isBrowserQuickActionSelected
-                  ? "bg-sidebar-accent text-sidebar-accent-foreground"
-                  : "text-sidebar-foreground/80 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground"
-              )}
-            >
-              <Globe className="size-4" />
-              <span>Run browser task</span>
-            </button>
-          )}
-          {onOpenSuggestedTopics && (
-            <button
-              type="button"
-              onClick={onOpenSuggestedTopics}
-              className={cn(
-                "flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-sm transition-colors",
-                isSuggestedTopicsQuickActionSelected
-                  ? "bg-sidebar-accent text-sidebar-accent-foreground"
-                  : "text-sidebar-foreground/80 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground"
-              )}
-            >
-              <Lightbulb className="size-4" />
-              <span>Suggested Topics</span>
-            </button>
-          )}
-          {onOpenBgTasks && (
-            <button
-              type="button"
-              onClick={onOpenBgTasks}
-              className={cn(
-                "flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-sm transition-colors",
-                isBgTasksQuickActionSelected
-                  ? "bg-sidebar-accent text-sidebar-accent-foreground"
-                  : "text-sidebar-foreground/80 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground"
-              )}
-            >
-              <ListChecks className="size-4" />
-              <span>Background tasks</span>
-            </button>
-          )}
           {onOpenEmail && (
             <button
               type="button"
@@ -680,45 +586,41 @@ export function SidebarContentPanel({
               <span>Meetings</span>
             </button>
           )}
-          {onOpenLiveNotes && (
+          {onOpenBgTasks && (
             <button
               type="button"
-              onClick={onOpenLiveNotes}
+              onClick={onOpenBgTasks}
               className={cn(
                 "flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-sm transition-colors",
-                isLiveNotesQuickActionSelected
+                isBgTasksQuickActionSelected
                   ? "bg-sidebar-accent text-sidebar-accent-foreground"
                   : "text-sidebar-foreground/80 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground"
               )}
             >
-              <Radio className="size-4" />
-              <span>Live notes</span>
+              <ListChecks className="size-4" />
+              <span>Agents</span>
             </button>
           )}
         </div>
       </SidebarHeader>
       <SidebarContent>
-        {activeSection === "knowledge" && (
-          <KnowledgeSection
-            tree={tree}
-            selectedPath={selectedPath}
-            expandedPaths={expandedPaths}
-            onSelectFile={onSelectFile}
-            onToggleFolder={onToggleFolder}
-            actions={knowledgeActions}
-            onVoiceNoteCreated={onVoiceNoteCreated}
-          />
-        )}
-        {activeSection === "tasks" && (
-          <TasksSection
-            runs={runs}
-            currentRunId={currentRunId}
-            processingRunIds={processingRunIds}
-            actions={tasksActions}
-            backgroundTasks={backgroundTasks}
-            selectedBackgroundTask={selectedBackgroundTask}
-          />
-        )}
+        <KnowledgeSection
+          tree={tree}
+          selectedPath={selectedPath}
+          expandedPaths={expandedPaths}
+          onSelectFile={onSelectFile}
+          onToggleFolder={onToggleFolder}
+          actions={knowledgeActions}
+          onVoiceNoteCreated={onVoiceNoteCreated}
+        />
+        <TasksSection
+          runs={runs}
+          currentRunId={currentRunId}
+          processingRunIds={processingRunIds}
+          actions={tasksActions}
+          backgroundTasks={backgroundTasks}
+          selectedBackgroundTask={selectedBackgroundTask}
+        />
       </SidebarContent>
       {/* Billing / upgrade CTA or Log in CTA */}
       {isRowboatConnected && billing ? (
@@ -758,6 +660,43 @@ export function SidebarContentPanel({
           </button>
         </div>
       )}
+      {/* Secondary quick actions (above bottom divider) */}
+      {(onToggleBrowser || onOpenSuggestedTopics) && (
+        <div className="px-2 pb-1">
+          <div className="flex flex-col gap-0.5">
+            {onToggleBrowser && (
+              <button
+                type="button"
+                onClick={onToggleBrowser}
+                className={cn(
+                  "flex w-full items-center gap-2 rounded-md px-2 py-1 text-xs transition-colors",
+                  isBrowserQuickActionSelected
+                    ? "bg-sidebar-accent text-sidebar-accent-foreground"
+                    : "text-sidebar-foreground/70 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground"
+                )}
+              >
+                <Globe className="size-4" />
+                <span>Run browser task</span>
+              </button>
+            )}
+            {onOpenSuggestedTopics && (
+              <button
+                type="button"
+                onClick={onOpenSuggestedTopics}
+                className={cn(
+                  "flex w-full items-center gap-2 rounded-md px-2 py-1 text-xs transition-colors",
+                  isSuggestedTopicsQuickActionSelected
+                    ? "bg-sidebar-accent text-sidebar-accent-foreground"
+                    : "text-sidebar-foreground/70 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground"
+                )}
+              >
+                <Lightbulb className="size-4" />
+                <span>Suggested Topics</span>
+              </button>
+            )}
+          </div>
+        </div>
+      )}
       {/* Bottom actions */}
       <div className="border-t border-sidebar-border px-2 py-2">
         <div className="flex flex-col gap-1">
@@ -1109,10 +1048,18 @@ function KnowledgeSection({
   const treeContainerRef = React.useRef<HTMLDivElement | null>(null)
   const [selectedFolderPath, setSelectedFolderPath] = useState<string | null>(null)
   const [renameTarget, setRenameTarget] = useState<string | null>(null)
+  const [knowledgeTab, setKnowledgeTab] = useState<'notes' | 'workspaces'>('notes')
   const visibleTree = React.useMemo(
-    () => tree.filter((item) => item.path !== 'knowledge/Meetings'),
+    () => tree.filter((item) => item.path !== 'knowledge/Meetings' && item.path !== 'knowledge/Workspace'),
     [tree],
   )
+  const workspaceFolders = React.useMemo<TreeNode[]>(() => {
+    const root = tree.find((item) => item.path === 'knowledge/Workspace')
+    const children = root?.children ?? []
+    return [...children]
+      .filter((c) => c.kind === 'dir')
+      .sort((a, b) => a.name.localeCompare(b.name))
+  }, [tree])
 
   useEffect(() => {
     if (!selectedPath) return
@@ -1184,75 +1131,267 @@ function KnowledgeSection({
   ]
 
   return (
-    <ContextMenu>
-      <ContextMenuTrigger asChild>
-        <SidebarGroup className="flex-1 flex flex-col overflow-hidden">
-          <div className="flex items-center justify-center gap-1 py-1 sticky top-0 z-10 bg-sidebar border-b border-sidebar-border">
-            {quickActions.map((action) => (
-              <Tooltip key={action.label}>
-                <TooltipTrigger asChild>
-                  <button
-                    onClick={action.action}
-                    className="text-sidebar-foreground/70 hover:text-sidebar-foreground hover:bg-sidebar-accent rounded p-1.5 transition-colors"
-                  >
-                    <action.icon className="size-4" />
-                  </button>
-                </TooltipTrigger>
-                <TooltipContent side="bottom">{action.label}</TooltipContent>
-              </Tooltip>
-            ))}
-            <VoiceNoteButton onNoteCreated={onVoiceNoteCreated} />
-            <Tooltip>
-              <TooltipTrigger asChild>
-                <button
-                  onClick={isExpanded ? actions.collapseAll : actions.expandAll}
-                  className="text-sidebar-foreground/70 hover:text-sidebar-foreground hover:bg-sidebar-accent rounded p-1.5 transition-colors"
-                >
-                  {isExpanded ? (
-                    <ChevronsDownUp className="size-4" />
-                  ) : (
-                    <ChevronsUpDown className="size-4" />
-                  )}
-                </button>
-              </TooltipTrigger>
-              <TooltipContent side="bottom">
-                {isExpanded ? "Collapse All" : "Expand All"}
-              </TooltipContent>
-            </Tooltip>
-          </div>
-          <SidebarGroupContent className="flex-1 overflow-y-auto">
-            <div ref={treeContainerRef}>
-              <SidebarMenu>
-                {visibleTree.map((item, index) => (
-                  <Tree
-                    key={index}
-                    item={item}
-                    selectedPath={selectedPath}
-                    expandedPaths={expandedPaths}
-                    onSelect={handleSelect}
-                    onToggleFolder={onToggleFolder}
-                    actions={wrappedActions}
-                    selectedFolderPath={selectedFolderPath}
-                    renameTarget={renameTarget}
-                    onRenameTargetConsumed={() => setRenameTarget(null)}
-                  />
+    <SidebarGroup className="flex flex-col">
+      <div className="px-3 py-1.5 text-xs font-medium text-muted-foreground">
+        Knowledge
+      </div>
+      <div className="px-2 pb-1">
+        <div className="flex w-full rounded-md bg-sidebar-accent/40 p-0.5">
+          <button
+            type="button"
+            onClick={() => setKnowledgeTab('notes')}
+            className={cn(
+              "flex-1 rounded px-2 py-1 text-xs font-medium transition-colors",
+              knowledgeTab === 'notes'
+                ? "bg-sidebar-accent text-sidebar-accent-foreground shadow-sm"
+                : "text-sidebar-foreground/70 hover:text-sidebar-foreground"
+            )}
+          >
+            Notes
+          </button>
+          <button
+            type="button"
+            onClick={() => setKnowledgeTab('workspaces')}
+            className={cn(
+              "flex-1 rounded px-2 py-1 text-xs font-medium transition-colors",
+              knowledgeTab === 'workspaces'
+                ? "bg-sidebar-accent text-sidebar-accent-foreground shadow-sm"
+                : "text-sidebar-foreground/70 hover:text-sidebar-foreground"
+            )}
+          >
+            Workspaces
+          </button>
+        </div>
+      </div>
+      {knowledgeTab === 'notes' ? (
+        <ContextMenu>
+          <ContextMenuTrigger asChild>
+            <div className="flex flex-col">
+              <div className="flex items-center justify-center gap-1 py-1 sticky top-0 z-10 bg-sidebar border-b border-sidebar-border">
+                {quickActions.map((action) => (
+                  <Tooltip key={action.label}>
+                    <TooltipTrigger asChild>
+                      <button
+                        onClick={action.action}
+                        className="text-sidebar-foreground/70 hover:text-sidebar-foreground hover:bg-sidebar-accent rounded p-1.5 transition-colors"
+                      >
+                        <action.icon className="size-4" />
+                      </button>
+                    </TooltipTrigger>
+                    <TooltipContent side="bottom">{action.label}</TooltipContent>
+                  </Tooltip>
                 ))}
-              </SidebarMenu>
+                <VoiceNoteButton onNoteCreated={onVoiceNoteCreated} />
+                <Tooltip>
+                  <TooltipTrigger asChild>
+                    <button
+                      onClick={isExpanded ? actions.collapseAll : actions.expandAll}
+                      className="text-sidebar-foreground/70 hover:text-sidebar-foreground hover:bg-sidebar-accent rounded p-1.5 transition-colors"
+                    >
+                      {isExpanded ? (
+                        <ChevronsDownUp className="size-4" />
+                      ) : (
+                        <ChevronsUpDown className="size-4" />
+                      )}
+                    </button>
+                  </TooltipTrigger>
+                  <TooltipContent side="bottom">
+                    {isExpanded ? "Collapse All" : "Expand All"}
+                  </TooltipContent>
+                </Tooltip>
+              </div>
+              <SidebarGroupContent>
+                <div ref={treeContainerRef}>
+                  <SidebarMenu>
+                    {visibleTree.map((item, index) => (
+                      <Tree
+                        key={index}
+                        item={item}
+                        selectedPath={selectedPath}
+                        expandedPaths={expandedPaths}
+                        onSelect={handleSelect}
+                        onToggleFolder={onToggleFolder}
+                        actions={wrappedActions}
+                        selectedFolderPath={selectedFolderPath}
+                        renameTarget={renameTarget}
+                        onRenameTargetConsumed={() => setRenameTarget(null)}
+                      />
+                    ))}
+                  </SidebarMenu>
+                </div>
+              </SidebarGroupContent>
             </div>
-          </SidebarGroupContent>
-        </SidebarGroup>
-      </ContextMenuTrigger>
-      <ContextMenuContent className="w-48">
-        <ContextMenuItem onClick={() => wrappedActions.createNote()}>
-          <FilePlus className="mr-2 size-4" />
-          New Note
-        </ContextMenuItem>
-        <ContextMenuItem onClick={() => void wrappedActions.createFolder()}>
-          <FolderPlus className="mr-2 size-4" />
-          New Folder
-        </ContextMenuItem>
-      </ContextMenuContent>
-    </ContextMenu>
+          </ContextMenuTrigger>
+          <ContextMenuContent className="w-48">
+            <ContextMenuItem onClick={() => wrappedActions.createNote()}>
+              <FilePlus className="mr-2 size-4" />
+              New Note
+            </ContextMenuItem>
+            <ContextMenuItem onClick={() => void wrappedActions.createFolder()}>
+              <FolderPlus className="mr-2 size-4" />
+              New Folder
+            </ContextMenuItem>
+          </ContextMenuContent>
+        </ContextMenu>
+      ) : (
+        <WorkspacesPanel
+          workspaces={workspaceFolders}
+          onOpen={(path) => actions.openWorkspaceAt(path)}
+          onOpenRoot={() => actions.openWorkspaceAt()}
+          onCreate={actions.createWorkspace}
+          onRevealInFileManager={() => actions.revealInFileManager('knowledge/Workspace', true)}
+        />
+      )}
+    </SidebarGroup>
+  )
+}
+
+function WorkspacesPanel({
+  workspaces,
+  onOpen,
+  onOpenRoot,
+  onCreate,
+  onRevealInFileManager,
+}: {
+  workspaces: TreeNode[]
+  onOpen: (path: string) => void
+  onOpenRoot: () => void
+  onCreate: (name: string) => Promise<string>
+  onRevealInFileManager: () => void
+}) {
+  const fileManagerName = getFileManagerName()
+  const [addOpen, setAddOpen] = useState(false)
+  const [newName, setNewName] = useState('')
+  const [creating, setCreating] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  const resetDialog = useCallback(() => {
+    setNewName('')
+    setError(null)
+    setCreating(false)
+  }, [])
+
+  const handleCreate = useCallback(async () => {
+    setCreating(true)
+    setError(null)
+    try {
+      const newPath = await onCreate(newName)
+      setAddOpen(false)
+      resetDialog()
+      onOpen(newPath)
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to create workspace')
+      setCreating(false)
+    }
+  }, [newName, onCreate, onOpen, resetDialog])
+
+  return (
+    <>
+      <div className="flex items-center justify-center gap-1 py-1 sticky top-0 z-10 bg-sidebar border-b border-sidebar-border">
+        <Tooltip>
+          <TooltipTrigger asChild>
+            <button
+              type="button"
+              onClick={() => setAddOpen(true)}
+              className="text-sidebar-foreground/70 hover:text-sidebar-foreground hover:bg-sidebar-accent rounded p-1.5 transition-colors"
+            >
+              <FolderPlus className="size-4" />
+            </button>
+          </TooltipTrigger>
+          <TooltipContent side="bottom">Add workspace</TooltipContent>
+        </Tooltip>
+        <Tooltip>
+          <TooltipTrigger asChild>
+            <button
+              type="button"
+              onClick={onOpenRoot}
+              className="text-sidebar-foreground/70 hover:text-sidebar-foreground hover:bg-sidebar-accent rounded p-1.5 transition-colors"
+            >
+              <LayoutGrid className="size-4" />
+            </button>
+          </TooltipTrigger>
+          <TooltipContent side="bottom">Workspace view</TooltipContent>
+        </Tooltip>
+        <Tooltip>
+          <TooltipTrigger asChild>
+            <button
+              type="button"
+              onClick={onRevealInFileManager}
+              className="text-sidebar-foreground/70 hover:text-sidebar-foreground hover:bg-sidebar-accent rounded p-1.5 transition-colors"
+            >
+              <FolderOpen className="size-4" />
+            </button>
+          </TooltipTrigger>
+          <TooltipContent side="bottom">Open in {fileManagerName}</TooltipContent>
+        </Tooltip>
+      </div>
+      <SidebarGroupContent>
+        <SidebarMenu>
+          {workspaces.length === 0 ? (
+            <div className="px-3 py-2 text-xs text-sidebar-foreground/60">
+              No workspaces yet.
+            </div>
+          ) : (
+            workspaces.map((ws) => (
+              <SidebarMenuItem key={ws.path}>
+                <SidebarMenuButton onClick={() => onOpen(ws.path)}>
+                  <Folder className="size-4 shrink-0" />
+                  <span className="truncate">{ws.name}</span>
+                </SidebarMenuButton>
+              </SidebarMenuItem>
+            ))
+          )}
+        </SidebarMenu>
+      </SidebarGroupContent>
+      <Dialog
+        open={addOpen}
+        onOpenChange={(open) => {
+          setAddOpen(open)
+          if (!open) resetDialog()
+        }}
+      >
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>New workspace</DialogTitle>
+            <DialogDescription>
+              Workspaces are top-level folders inside knowledge/Workspace.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="grid gap-2">
+            <label htmlFor="sidebar-workspace-name" className="text-sm font-medium">Name</label>
+            <Input
+              id="sidebar-workspace-name"
+              value={newName}
+              onChange={(e) => setNewName(e.target.value)}
+              placeholder="e.g. Alpha"
+              autoFocus
+              onKeyDown={(e) => {
+                if (e.key === 'Enter' && !creating) {
+                  e.preventDefault()
+                  void handleCreate()
+                }
+              }}
+            />
+            {error && <p className="text-xs text-destructive">{error}</p>}
+          </div>
+          <DialogFooter>
+            <Button
+              variant="outline"
+              onClick={() => {
+                setAddOpen(false)
+                resetDialog()
+              }}
+              disabled={creating}
+            >
+              Cancel
+            </Button>
+            <Button onClick={() => void handleCreate()} disabled={creating || !newName.trim()}>
+              {creating ? 'Creating…' : 'Create'}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </>
   )
 }
 
@@ -1608,8 +1747,8 @@ function TasksSection({
   const [pendingDeleteRunId, setPendingDeleteRunId] = useState<string | null>(null)
 
   return (
-    <SidebarGroup className="flex-1 flex flex-col overflow-hidden">
-      <SidebarGroupContent className="flex-1 overflow-y-auto">
+    <SidebarGroup className="flex flex-col">
+      <SidebarGroupContent>
         {/* Background Tasks Section */}
         {backgroundTasks.length > 0 && (
           <>
diff --git a/apps/x/apps/renderer/src/components/workspace-view.tsx b/apps/x/apps/renderer/src/components/workspace-view.tsx
new file mode 100644
index 00000000..4001140c
--- /dev/null
+++ b/apps/x/apps/renderer/src/components/workspace-view.tsx
@@ -0,0 +1,262 @@
+import { useCallback, useEffect, useMemo, useState } from 'react'
+import { ChevronRight, File as FileIcon, Folder as FolderIcon, Home, Plus } from 'lucide-react'
+
+import { Button } from '@/components/ui/button'
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog'
+import { Input } from '@/components/ui/input'
+import { cn } from '@/lib/utils'
+
+const WORKSPACE_ROOT = 'knowledge/Workspace'
+
+interface TreeNode {
+  path: string
+  name: string
+  kind: 'file' | 'dir'
+  children?: TreeNode[]
+}
+
+type WorkspaceViewProps = {
+  tree: TreeNode[]
+  initialPath?: string | null
+  onOpenNote: (path: string) => void
+  onCreateWorkspace: (name: string) => Promise<void>
+}
+
+function findNode(nodes: TreeNode[] | undefined, path: string): TreeNode | null {
+  if (!nodes) return null
+  for (const node of nodes) {
+    if (node.path === path) return node
+    if (node.kind === 'dir' && path.startsWith(`${node.path}/`)) {
+      const found = findNode(node.children, path)
+      if (found) return found
+    }
+  }
+  return null
+}
+
+function countChildren(node: TreeNode | null): number {
+  if (!node || node.kind !== 'dir' || !node.children) return 0
+  return node.children.length
+}
+
+export function WorkspaceView({ tree, initialPath, onOpenNote, onCreateWorkspace }: WorkspaceViewProps) {
+  const [currentPath, setCurrentPath] = useState<string>(initialPath || WORKSPACE_ROOT)
+  const [addOpen, setAddOpen] = useState(false)
+  const [newName, setNewName] = useState('')
+  const [creating, setCreating] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (initialPath) setCurrentPath(initialPath)
+  }, [initialPath])
+
+  const isRoot = currentPath === WORKSPACE_ROOT
+
+  const currentNode = useMemo(() => findNode(tree, currentPath), [tree, currentPath])
+
+  const items = useMemo<TreeNode[]>(() => {
+    const children = currentNode?.children ?? []
+    const filtered = isRoot ? children.filter((c) => c.kind === 'dir') : children
+    return [...filtered].sort((a, b) => {
+      if (a.kind !== b.kind) return a.kind === 'dir' ? -1 : 1
+      return a.name.localeCompare(b.name)
+    })
+  }, [currentNode, isRoot])
+
+  const breadcrumbs = useMemo(() => {
+    if (isRoot) return [] as { path: string; name: string }[]
+    const rel = currentPath.slice(WORKSPACE_ROOT.length + 1)
+    const parts = rel.split('/').filter(Boolean)
+    let acc = WORKSPACE_ROOT
+    return parts.map((seg) => {
+      acc = `${acc}/${seg}`
+      return { path: acc, name: seg }
+    })
+  }, [currentPath, isRoot])
+
+  const handleItemClick = useCallback(
+    (item: TreeNode) => {
+      if (item.kind === 'dir') {
+        setCurrentPath(item.path)
+      } else {
+        onOpenNote(item.path)
+      }
+    },
+    [onOpenNote],
+  )
+
+  const resetAddDialog = useCallback(() => {
+    setNewName('')
+    setError(null)
+    setCreating(false)
+  }, [])
+
+  const handleCreate = useCallback(async () => {
+    const trimmed = newName.trim()
+    if (!trimmed) {
+      setError('Name is required')
+      return
+    }
+    if (trimmed.includes('/')) {
+      setError('Name cannot contain "/"')
+      return
+    }
+    setCreating(true)
+    setError(null)
+    try {
+      await onCreateWorkspace(trimmed)
+      setAddOpen(false)
+      resetAddDialog()
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to create workspace')
+      setCreating(false)
+    }
+  }, [newName, onCreateWorkspace, resetAddDialog])
+
+  return (
+    <div className="flex h-full flex-col overflow-hidden">
+      <div className="flex shrink-0 items-center justify-between gap-3 border-b border-border px-6 py-4">
+        <div className="flex min-w-0 items-center gap-1 text-sm">
+          <button
+            type="button"
+            onClick={() => setCurrentPath(WORKSPACE_ROOT)}
+            className={cn(
+              'inline-flex items-center gap-1.5 rounded-md px-2 py-1 transition-colors',
+              isRoot ? 'text-foreground' : 'text-muted-foreground hover:text-foreground hover:bg-accent',
+            )}
+          >
+            <Home className="size-4" />
+            <span className="font-medium">Workspace</span>
+          </button>
+          {breadcrumbs.map((crumb, idx) => {
+            const isLast = idx === breadcrumbs.length - 1
+            return (
+              <span key={crumb.path} className="flex items-center gap-1">
+                <ChevronRight className="size-4 text-muted-foreground/60" />
+                {isLast ? (
+                  <span className="rounded-md px-2 py-1 font-medium text-foreground truncate">
+                    {crumb.name}
+                  </span>
+                ) : (
+                  <button
+                    type="button"
+                    onClick={() => setCurrentPath(crumb.path)}
+                    className="rounded-md px-2 py-1 text-muted-foreground transition-colors hover:bg-accent hover:text-foreground truncate"
+                  >
+                    {crumb.name}
+                  </button>
+                )}
+              </span>
+            )
+          })}
+        </div>
+        {isRoot && (
+          <Button size="sm" onClick={() => setAddOpen(true)}>
+            <Plus className="size-4" />
+            Add workspace
+          </Button>
+        )}
+      </div>
+
+      <div className="flex-1 overflow-y-auto px-6 py-6">
+        {items.length === 0 ? (
+          <div className="flex h-full flex-col items-center justify-center gap-3 text-center text-muted-foreground">
+            <FolderIcon className="size-10 opacity-50" />
+            <div className="text-sm">
+              {isRoot
+                ? 'No workspaces yet. Create one to get started.'
+                : 'This folder is empty.'}
+            </div>
+            {isRoot && (
+              <Button size="sm" variant="outline" onClick={() => setAddOpen(true)}>
+                <Plus className="size-4" />
+                Add workspace
+              </Button>
+            )}
+          </div>
+        ) : (
+          <div className="grid grid-cols-[repeat(auto-fill,minmax(180px,1fr))] gap-3">
+            {items.map((item) => {
+              const childCount = item.kind === 'dir' ? countChildren(item) : 0
+              const Icon = item.kind === 'dir' ? FolderIcon : FileIcon
+              return (
+                <button
+                  key={item.path}
+                  type="button"
+                  onClick={() => handleItemClick(item)}
+                  className="group flex flex-col items-start gap-2 rounded-lg border border-border bg-card p-4 text-left transition-colors hover:border-foreground/20 hover:bg-accent"
+                >
+                  <Icon className="size-6 text-muted-foreground group-hover:text-foreground" />
+                  <div className="min-w-0 w-full">
+                    <div className="truncate text-sm font-medium">{item.name}</div>
+                    {item.kind === 'dir' && (
+                      <div className="text-xs text-muted-foreground">
+                        {childCount} {childCount === 1 ? 'item' : 'items'}
+                      </div>
+                    )}
+                  </div>
+                </button>
+              )
+            })}
+          </div>
+        )}
+      </div>
+
+      <Dialog
+        open={addOpen}
+        onOpenChange={(open) => {
+          setAddOpen(open)
+          if (!open) resetAddDialog()
+        }}
+      >
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>New workspace</DialogTitle>
+            <DialogDescription>
+              Workspaces are top-level folders inside knowledge/Workspace.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="grid gap-2">
+            <label htmlFor="workspace-name" className="text-sm font-medium">Name</label>
+            <Input
+              id="workspace-name"
+              value={newName}
+              onChange={(e) => setNewName(e.target.value)}
+              placeholder="e.g. Alpha"
+              autoFocus
+              onKeyDown={(e) => {
+                if (e.key === 'Enter' && !creating) {
+                  e.preventDefault()
+                  void handleCreate()
+                }
+              }}
+            />
+            {error && <p className="text-xs text-destructive">{error}</p>}
+          </div>
+          <DialogFooter>
+            <Button
+              variant="outline"
+              onClick={() => {
+                setAddOpen(false)
+                resetAddDialog()
+              }}
+              disabled={creating}
+            >
+              Cancel
+            </Button>
+            <Button onClick={() => void handleCreate()} disabled={creating || !newName.trim()}>
+              {creating ? 'Creating…' : 'Create'}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </div>
+  )
+}