bases

apps/x/apps/renderer/src/App.tsx

@@ -12,6 +12,7 @@ import { ChatSidebar } from './components/chat-sidebar';
 import { ChatInputWithMentions, type StagedAttachment } from './components/chat-input-with-mentions';
 import { ChatMessageAttachments } from '@/components/chat-message-attachments'
 import { GraphView, type GraphEdge, type GraphNode } from '@/components/graph-view';
+import { BasesView, type BaseConfig, DEFAULT_BASE_CONFIG } from '@/components/bases-view';
 import { useDebounce } from './hooks/use-debounce';
 import { SidebarContentPanel } from '@/components/sidebar-content';
 import { SidebarSectionProvider } from '@/contexts/sidebar-context';
@@ -46,7 +47,7 @@ import {
 import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from "@/components/ui/tooltip"
 import { Toaster } from "@/components/ui/sonner"
 import { stripKnowledgePrefix, toKnowledgePath, wikiLabel } from '@/lib/wiki-links'
-import { splitFrontmatter, joinFrontmatter, extractTags } from '@/lib/frontmatter'
+import { splitFrontmatter, joinFrontmatter } from '@/lib/frontmatter'
 import { OnboardingModal } from '@/components/onboarding-modal'
 import { SearchDialog } from '@/components/search-dialog'
 import { BackgroundTaskDetail } from '@/components/background-task-detail'
@@ -106,6 +107,7 @@ const TITLEBAR_TOGGLE_MARGIN_LEFT_PX = 12
 const TITLEBAR_BUTTONS_COLLAPSED = 5
 const TITLEBAR_BUTTON_GAPS_COLLAPSED = 4
 const GRAPH_TAB_PATH = '__rowboat_graph_view__'
+const BASES_DEFAULT_TAB_PATH = '__rowboat_bases_default__'
 
 const clampNumber = (value: number, min: number, max: number) =>
   Math.min(max, Math.max(min, value))
@@ -233,6 +235,7 @@ const getAncestorDirectoryPaths = (path: string): string[] => {
 }
 
 const isGraphTabPath = (path: string) => path === GRAPH_TAB_PATH
+const isBaseFilePath = (path: string) => path.endsWith('.base') || path === BASES_DEFAULT_TAB_PATH
 
 const normalizeUsage = (usage?: Partial<LanguageModelUsage> | null): LanguageModelUsage | null => {
   if (!usage) return null
@@ -470,6 +473,7 @@ function App() {
   const [recentWikiFiles, setRecentWikiFiles] = useState<string[]>([])
   const [isGraphOpen, setIsGraphOpen] = useState(false)
   const [expandedFrom, setExpandedFrom] = useState<{ path: string | null; graph: boolean } | null>(null)
+  const [baseConfigByPath, setBaseConfigByPath] = useState<Record<string, BaseConfig>>({})
   const [graphData, setGraphData] = useState<{ nodes: GraphNode[]; edges: GraphEdge[] }>({
     nodes: [],
     edges: [],
@@ -510,9 +514,8 @@ function App() {
   const initialContentRef = useRef<string>('')
   const renameInProgressRef = useRef(false)
 
-  // Frontmatter state: store raw frontmatter per file path, tags for active file
+  // Frontmatter state: store raw frontmatter per file path
   const frontmatterByPathRef = useRef<Map<string, string | null>>(new Map())
-  const [activeFileTags, setActiveFileTags] = useState<string[]>([])
 
   // Version history state
   const [versionHistoryPath, setVersionHistoryPath] = useState<string | null>(null)
@@ -621,6 +624,8 @@ function App() {
 
   const getFileTabTitle = useCallback((tab: FileTab) => {
     if (isGraphTabPath(tab.path)) return 'Graph View'
+    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
   }, [])
 
@@ -818,20 +823,45 @@ function App() {
     }
   }, [runId, processingRunIds])
 
-  // Load directory tree
+  // Load directory tree (knowledge + bases)
   const loadDirectory = useCallback(async () => {
     try {
-      const result = await window.ipc.invoke('workspace:readdir', {
+      const [knowledgeResult, basesResult] = await Promise.all([
+        window.ipc.invoke('workspace:readdir', {
           path: 'knowledge',
-        opts: { recursive: true, includeHidden: false }
-      })
-      return buildTree(result)
+          opts: { recursive: true, includeHidden: false, includeStats: true }
+        }),
+        window.ipc.invoke('workspace:readdir', {
+          path: 'bases',
+          opts: { recursive: false, includeHidden: false, includeStats: true }
+        }).catch(() => [] as DirEntry[]),
+      ])
+      const knowledgeTree = buildTree(knowledgeResult)
+      const basesChildren: TreeNode[] = (basesResult as DirEntry[])
+        .filter((e) => e.name.endsWith('.base'))
+        .map((e) => ({ ...e, kind: 'file' as const }))
+      if (basesChildren.length > 0) {
+        const basesFolder: TreeNode = {
+          name: 'Bases',
+          path: 'bases',
+          kind: 'dir',
+          children: basesChildren,
+        }
+        return [...knowledgeTree, basesFolder]
+      }
+      return knowledgeTree
     } catch (err) {
       console.error('Failed to load directory:', err)
       return []
     }
   }, [])
 
+  // Ensure bases/ directory exists on startup
+  useEffect(() => {
+    window.ipc.invoke('workspace:mkdir', { path: 'bases', recursive: true })
+      .catch((err: unknown) => console.error('Failed to ensure bases directory:', err))
+  }, [])
+
   // Load initial tree
   useEffect(() => {
     loadDirectory().then(setTree)
@@ -905,7 +935,6 @@ function App() {
           editorPathRef.current = pathToReload
           initialContentByPathRef.current.set(pathToReload, body)
           initialContentRef.current = body
-          setActiveFileTags(extractTags(fm))
         }
       }
     })
@@ -923,6 +952,31 @@ function App() {
       setLastSaved(null)
       return
     }
+    if (selectedPath === BASES_DEFAULT_TAB_PATH) {
+      // Virtual default base — no file to load, use DEFAULT_BASE_CONFIG
+      if (!baseConfigByPath[selectedPath]) {
+        setBaseConfigByPath((prev) => ({ ...prev, [selectedPath]: { ...DEFAULT_BASE_CONFIG } }))
+      }
+      return
+    }
+    if (selectedPath.endsWith('.base')) {
+      // Load base config from file only if not already cached
+      if (!baseConfigByPath[selectedPath]) {
+        window.ipc.invoke('workspace:readFile', { path: selectedPath, encoding: 'utf8' })
+          .then((result: { data: string }) => {
+            try {
+              const parsed = JSON.parse(result.data) as BaseConfig
+              setBaseConfigByPath((prev) => ({ ...prev, [selectedPath]: parsed }))
+            } catch {
+              setBaseConfigByPath((prev) => ({ ...prev, [selectedPath]: { ...DEFAULT_BASE_CONFIG } }))
+            }
+          })
+          .catch(() => {
+            setBaseConfigByPath((prev) => ({ ...prev, [selectedPath]: { ...DEFAULT_BASE_CONFIG } }))
+          })
+      }
+      return
+    }
     if (selectedPath.endsWith('.md')) {
       const cachedContent = editorContentByPathRef.current.get(selectedPath)
       const hasBaseline = initialContentByPathRef.current.has(selectedPath)
@@ -934,7 +988,6 @@ function App() {
         editorContentRef.current = cachedContent
         editorPathRef.current = selectedPath
         initialContentRef.current = initialContentByPathRef.current.get(selectedPath) ?? cachedContent
-        setActiveFileTags(extractTags(frontmatterByPathRef.current.get(selectedPath) ?? null))
         return
       }
     }
@@ -943,9 +996,20 @@ function App() {
     let cancelled = false
     ;(async () => {
       try {
+        // For .md files (from the knowledge tree), skip stat and read directly.
+        // For other file types, stat first to check if it's a file vs directory.
+        const isKnownFile = pathToLoad.endsWith('.md')
+        if (!isKnownFile) {
           const stat = await window.ipc.invoke('workspace:stat', { path: pathToLoad })
           if (cancelled || fileLoadRequestIdRef.current !== requestId || selectedPathRef.current !== pathToLoad) return
-        if (stat.kind === 'file') {
+          if (stat.kind !== 'file') {
+            setFileContent('')
+            setEditorContent('')
+            editorContentRef.current = ''
+            initialContentRef.current = ''
+            return
+          }
+        }
         const result = await window.ipc.invoke('workspace:readFile', { path: pathToLoad })
         if (cancelled || fileLoadRequestIdRef.current !== requestId || selectedPathRef.current !== pathToLoad) return
         setFileContent(result.data)
@@ -953,13 +1017,10 @@ function App() {
         frontmatterByPathRef.current.set(pathToLoad, fm)
         const normalizeForCompare = (s: string) => s.split('\n').map(line => line.trimEnd()).join('\n').trim()
         const isSameEditorFile = editorPathRef.current === pathToLoad
-          const knownBaseline = initialContentByPathRef.current.get(pathToLoad)
-          const hasKnownBaseline = knownBaseline !== undefined
-          const hasUnsavedEdits =
-            hasKnownBaseline
-            && normalizeForCompare(editorContentRef.current) !== normalizeForCompare(knownBaseline)
-          const shouldPreserveActiveDraft = isSameEditorFile && hasUnsavedEdits
-          if (!shouldPreserveActiveDraft) {
+        const wouldClobberActiveEdits =
+          isSameEditorFile
+          && normalizeForCompare(editorContentRef.current) !== normalizeForCompare(body)
+        if (!wouldClobberActiveEdits) {
           setEditorContent(body)
           if (pathToLoad.endsWith('.md')) {
             setEditorCacheForPath(pathToLoad, body)
@@ -969,17 +1030,10 @@ function App() {
           initialContentByPathRef.current.set(pathToLoad, body)
           initialContentRef.current = body
           setLastSaved(null)
-            setActiveFileTags(extractTags(fm))
         } else {
           // Still update the editor's path so subsequent autosaves write to the correct file.
           editorPathRef.current = pathToLoad
         }
-        } else {
-          setFileContent('')
-          setEditorContent('')
-          editorContentRef.current = ''
-          initialContentRef.current = ''
-        }
       } catch (err) {
         console.error('Failed to load file:', err)
         if (!cancelled && fileLoadRequestIdRef.current === requestId && selectedPathRef.current === pathToLoad) {
@@ -2177,7 +2231,7 @@ function App() {
 
   const closeFileTab = useCallback((tabId: string) => {
     const closingTab = fileTabs.find(t => t.id === tabId)
-    if (closingTab && !isGraphTabPath(closingTab.path)) {
+    if (closingTab && !isGraphTabPath(closingTab.path) && !isBaseFilePath(closingTab.path)) {
       removeEditorCacheForPath(closingTab.path)
       initialContentByPathRef.current.delete(closingTab.path)
       untitledRenameReadyPathsRef.current.delete(closingTab.path)
@@ -2186,6 +2240,13 @@ function App() {
         editorPathRef.current = null
       }
     }
+    if (closingTab && isBaseFilePath(closingTab.path)) {
+      setBaseConfigByPath((prev) => {
+        const next = { ...prev }
+        delete next[closingTab.path]
+        return next
+      })
+    }
     setFileTabs(prev => {
       if (prev.length <= 1) {
         // Last file tab - close it and go back to chat
@@ -2314,7 +2375,7 @@ function App() {
 
     if (activeFileTabId) {
       const activeTab = fileTabs.find((tab) => tab.id === activeFileTabId)
-      if (activeTab && !isGraphTabPath(activeTab.path)) {
+      if (activeTab && !isGraphTabPath(activeTab.path) && !isBaseFilePath(activeTab.path)) {
         setFileTabs((prev) => prev.map((tab) => (
           tab.id === activeFileTabId ? { ...tab, path } : tab
         )))
@@ -2459,6 +2520,46 @@ function App() {
     void navigateToView({ type: 'file', path })
   }, [navigateToView])
 
+  const handleBaseConfigChange = useCallback((path: string, config: BaseConfig) => {
+    setBaseConfigByPath((prev) => ({ ...prev, [path]: config }))
+  }, [])
+
+  const handleBaseSave = useCallback(async (name: string | null) => {
+    if (!selectedPath) return
+    const isDefault = selectedPath === BASES_DEFAULT_TAB_PATH
+    const config = baseConfigByPath[selectedPath] ?? DEFAULT_BASE_CONFIG
+
+    if (isDefault && name) {
+      // Save as new base file
+      const safeName = name.replace(/[\\/]/g, '-').trim()
+      const newPath = `bases/${safeName}.base`
+      const fileConfig = { ...config, name: safeName }
+      try {
+        await window.ipc.invoke('workspace:writeFile', {
+          path: newPath,
+          data: JSON.stringify(fileConfig, null, 2),
+        })
+        setBaseConfigByPath((prev) => ({ ...prev, [newPath]: fileConfig }))
+        // Refresh tree then navigate to the new file
+        const newTree = await loadDirectory()
+        setTree(newTree)
+        void navigateToView({ type: 'file', path: newPath })
+      } catch (err) {
+        console.error('Failed to save base:', err)
+      }
+    } else if (!isDefault) {
+      // Save in place
+      try {
+        await window.ipc.invoke('workspace:writeFile', {
+          path: selectedPath,
+          data: JSON.stringify(config, null, 2),
+        })
+      } catch (err) {
+        console.error('Failed to save base:', err)
+      }
+    }
+  }, [selectedPath, baseConfigByPath, loadDirectory, navigateToView])
+
   const navigateToFullScreenChat = useCallback(() => {
     // Only treat this as navigation when coming from another view
     if (currentViewState.type !== 'chat') {
@@ -2771,6 +2872,13 @@ function App() {
       }
       void navigateToView({ type: 'graph' })
     },
+    openBases: () => {
+      if (!selectedPath && !isGraphOpen && !selectedBackgroundTask) {
+        setIsChatSidebarOpen(false)
+        setIsRightPaneMaximized(false)
+      }
+      void navigateToView({ type: 'file', path: BASES_DEFAULT_TAB_PATH })
+    },
     expandAll: () => setExpandedPaths(new Set(collectDirPaths(tree))),
     collapseAll: () => setExpandedPaths(new Set()),
     rename: async (oldPath: string, newName: string, isDir: boolean) => {
@@ -3270,7 +3378,7 @@ function App() {
                     getTabId={(t) => t.id}
                     onSwitchTab={switchFileTab}
                     onCloseTab={closeFileTab}
-                    allowSingleTabClose={fileTabs.length === 1 && isGraphOpen}
+                    allowSingleTabClose={fileTabs.length === 1 && (isGraphOpen || (selectedPath != null && isBaseFilePath(selectedPath)))}
                   />
                 ) : (
                   <TabBar
@@ -3283,7 +3391,7 @@ function App() {
                     onCloseTab={closeChatTab}
                   />
                 )}
-                {selectedPath && (
+                {selectedPath && selectedPath.endsWith('.md') && (
                   <div className="flex items-center gap-1 text-xs text-muted-foreground self-center shrink-0 pl-2">
                     {isSaving ? (
                       <>
@@ -3372,7 +3480,18 @@ function App() {
                 )}
               </ContentHeader>
 
-              {isGraphOpen ? (
+              {selectedPath && isBaseFilePath(selectedPath) ? (
+                <div className="flex-1 min-h-0 flex flex-col overflow-hidden">
+                  <BasesView
+                    tree={tree}
+                    onSelectNote={(path) => navigateToFile(path)}
+                    config={baseConfigByPath[selectedPath] ?? DEFAULT_BASE_CONFIG}
+                    onConfigChange={(cfg) => handleBaseConfigChange(selectedPath, cfg)}
+                    isDefaultBase={selectedPath === BASES_DEFAULT_TAB_PATH}
+                    onSave={(name) => void handleBaseSave(name)}
+                  />
+                </div>
+              ) : isGraphOpen ? (
                 <div className="flex-1 min-h-0">
                   <GraphView
                     nodes={graphData.nodes}
@@ -3418,7 +3537,20 @@ function App() {
                               wikiLinks={wikiLinkConfig}
                               onImageUpload={handleImageUpload}
                               editorSessionKey={editorSessionByTabId[tab.id] ?? 0}
-                              tags={isActive ? activeFileTags : undefined}
+                              frontmatter={frontmatterByPathRef.current.get(tab.path) ?? null}
+                              onFrontmatterChange={(newRaw) => {
+                                frontmatterByPathRef.current.set(tab.path, newRaw)
+                                // Write updated frontmatter to disk immediately
+                                const currentBody = editorContentRef.current
+                                const fullContent = joinFrontmatter(newRaw, currentBody)
+                                initialContentByPathRef.current.set(tab.path, splitFrontmatter(fullContent).body)
+                                initialContentRef.current = splitFrontmatter(fullContent).body
+                                void window.ipc.invoke('workspace:writeFile', {
+                                  path: tab.path,
+                                  data: fullContent,
+                                  opts: { encoding: 'utf8' },
+                                })
+                              }}
                               onHistoryHandlersChange={(handlers) => {
                                 if (handlers) {
                                   fileHistoryHandlersRef.current.set(tab.id, handlers)

apps/x/apps/renderer/src/components/bases-view.tsx

@@ -1,9 +1,20 @@
 import * as React from 'react'
 import { useEffect, useState, useMemo, useCallback, useRef } from 'react'
-import { ArrowDown, ArrowUp, X } from 'lucide-react'
+import { ArrowDown, ArrowUp, ChevronLeft, ChevronRight, X, Check, ListFilter, Filter, Search, Save } from 'lucide-react'
 import { Badge } from '@/components/ui/badge'
+import { Popover, PopoverTrigger, PopoverContent } from '@/components/ui/popover'
+import { Command, CommandInput, CommandList, CommandItem, CommandEmpty, CommandGroup } from '@/components/ui/command'
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog'
 import { cn } from '@/lib/utils'
-import { splitFrontmatter, extractTags } from '@/lib/frontmatter'
+import { splitFrontmatter, extractAllFrontmatterValues } from '@/lib/frontmatter'
+import { useDebounce } from '@/hooks/use-debounce'
 
 interface TreeNode {
   path: string
@@ -17,34 +28,77 @@ type NoteEntry = {
   path: string
   name: string
   folder: string
-  tags: string[]
+  fields: Record<string, string | string[]>
   mtimeMs: number
 }
 
-type SortField = 'name' | 'folder' | 'mtimeMs'
 type SortDir = 'asc' | 'desc'
+type ActiveFilter = { category: string; value: string }
+
+export type BaseConfig = {
+  name: string
+  visibleColumns: string[]
+  columnWidths: Record<string, number>
+  sort: { field: string; dir: SortDir }
+  filters: ActiveFilter[]
+}
+
+export const DEFAULT_BASE_CONFIG: BaseConfig = {
+  name: 'All Notes',
+  visibleColumns: ['name', 'folder', 'relationship', 'topic', 'status', 'mtimeMs'],
+  columnWidths: {},
+  sort: { field: 'mtimeMs', dir: 'desc' },
+  filters: [],
+}
+
+const PAGE_SIZE = 25
+
+/** Built-in columns that don't come from frontmatter */
+const BUILTIN_COLUMNS = ['name', 'folder', 'mtimeMs'] as const
+type BuiltinColumn = (typeof BUILTIN_COLUMNS)[number]
+
+const BUILTIN_LABELS: Record<BuiltinColumn, string> = {
+  name: 'Name',
+  folder: 'Folder',
+  mtimeMs: 'Last Modified',
+}
+
+/** Default pixel widths for columns */
+const DEFAULT_WIDTHS: Record<string, number> = {
+  name: 200,
+  folder: 140,
+  mtimeMs: 140,
+}
+const DEFAULT_FRONTMATTER_WIDTH = 150
+
+/** Convert key to title case: `first_met` → `First Met` */
+function toTitleCase(key: string): string {
+  if (key in BUILTIN_LABELS) return BUILTIN_LABELS[key as BuiltinColumn]
+  return key
+    .split('_')
+    .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
+    .join(' ')
+}
 
 type BasesViewProps = {
   tree: TreeNode[]
   onSelectNote: (path: string) => void
+  config: BaseConfig
+  onConfigChange: (config: BaseConfig) => void
+  isDefaultBase: boolean
+  onSave: (name: string | null) => void
 }
 
-function collectFilePaths(nodes: TreeNode[]): { path: string; name: string; mtimeMs: number }[] {
+function collectFiles(nodes: TreeNode[]): { path: string; name: string; mtimeMs: number }[] {
   return nodes.flatMap((n) =>
     n.kind === 'file' && n.name.endsWith('.md')
       ? [{ path: n.path, name: n.name.replace(/\.md$/i, ''), mtimeMs: n.stat?.mtimeMs ?? 0 }]
       : n.children
-        ? collectFilePaths(n.children)
+        ? collectFiles(n.children)
         : [],
   )
 }
 
-/** Build a stable fingerprint from the tree's file paths + mtimes so we only reload when files actually change. */
-function treeFingerprint(nodes: TreeNode[]): string {
-  const files = collectFilePaths(nodes)
-  return files.map((f) => `${f.path}:${f.mtimeMs}`).join('\n')
-}
-
 function getFolder(path: string): string {
   const parts = path.split('/')
   if (parts.length >= 3) return parts[1]
@@ -57,247 +111,557 @@ function formatDate(ms: number): string {
   return d.toLocaleDateString(undefined, { month: 'short', day: 'numeric', year: 'numeric' })
 }
 
-export function BasesView({ tree, onSelectNote }: BasesViewProps) {
-  const [notes, setNotes] = useState<NoteEntry[]>([])
-  const [initialLoading, setInitialLoading] = useState(true)
-  const [selectedTags, setSelectedTags] = useState<Set<string>>(new Set())
-  const [sortField, setSortField] = useState<SortField>('mtimeMs')
-  const [sortDir, setSortDir] = useState<SortDir>('desc')
-  const lastFingerprintRef = useRef<string>('')
+function filtersEqual(a: ActiveFilter, b: ActiveFilter): boolean {
+  return a.category === b.category && a.value === b.value
+}
 
-  // Stable fingerprint — only changes when actual file paths/mtimes differ
-  const fingerprint = useMemo(() => treeFingerprint(tree), [tree])
+function hasFilter(filters: ActiveFilter[], f: ActiveFilter): boolean {
+  return filters.some((x) => filtersEqual(x, f))
+}
 
-  // Load notes data when fingerprint changes
+/** Get the string values for a column from a note */
+function getColumnValues(note: NoteEntry, column: string): string[] {
+  if (column === 'name') return [note.name]
+  if (column === 'folder') return [note.folder]
+  if (column === 'mtimeMs') return []
+  const v = note.fields[column]
+  if (!v) return []
+  return Array.isArray(v) ? v : [v]
+}
+
+/** Get a single sortable string for a column */
+function getSortValue(note: NoteEntry, column: string): string | number {
+  if (column === 'name') return note.name
+  if (column === 'folder') return note.folder
+  if (column === 'mtimeMs') return note.mtimeMs
+  const v = note.fields[column]
+  if (!v) return ''
+  return Array.isArray(v) ? v[0] ?? '' : v
+}
+
+const isBuiltin = (col: string): col is BuiltinColumn =>
+  (BUILTIN_COLUMNS as readonly string[]).includes(col)
+
+export function BasesView({ tree, onSelectNote, config, onConfigChange, isDefaultBase, onSave }: BasesViewProps) {
+  // Build notes instantly from tree
+  const notes = useMemo<NoteEntry[]>(() => {
+    return collectFiles(tree).map((f) => ({
+      path: f.path,
+      name: f.name,
+      folder: getFolder(f.path),
+      fields: {},
+      mtimeMs: f.mtimeMs,
+    }))
+  }, [tree])
+
+  // Frontmatter fields loaded async, keyed by path
+  const [fieldsByPath, setFieldsByPath] = useState<Map<string, Record<string, string | string[]>>>(new Map())
+  const loadGenRef = useRef(0)
+
+  // Load frontmatter in background batches
   useEffect(() => {
-    if (fingerprint === lastFingerprintRef.current) return
-    lastFingerprintRef.current = fingerprint
-
+    const gen = ++loadGenRef.current
     let cancelled = false
-    const files = collectFilePaths(tree)
+    const paths = notes.map((n) => n.path)
 
-    async function loadNotes() {
-      const entries: NoteEntry[] = []
-
-      for (const file of files) {
+    async function load() {
+      const BATCH = 30
+      for (let i = 0; i < paths.length; i += BATCH) {
+        if (cancelled) return
+        const batch = paths.slice(i, i + BATCH)
+        const results = await Promise.all(
+          batch.map(async (p) => {
             try {
-          const result = await window.ipc.invoke('workspace:readFile', {
-            path: file.path,
-            encoding: 'utf8',
-          })
+              const result = await window.ipc.invoke('workspace:readFile', { path: p, encoding: 'utf8' })
               const { raw } = splitFrontmatter(result.data)
-          const tags = extractTags(raw)
-          entries.push({
-            path: file.path,
-            name: file.name,
-            folder: getFolder(file.path),
-            tags,
-            mtimeMs: file.mtimeMs,
-          })
+              return { path: p, fields: extractAllFrontmatterValues(raw) }
             } catch {
-          entries.push({
-            path: file.path,
-            name: file.name,
-            folder: getFolder(file.path),
-            tags: [],
-            mtimeMs: file.mtimeMs,
+              return { path: p, fields: {} as Record<string, string | string[]> }
+            }
+          }),
+        )
+        if (cancelled || gen !== loadGenRef.current) return
+        setFieldsByPath((prev) => {
+          const next = new Map(prev)
+          for (const r of results) next.set(r.path, r.fields)
+          return next
         })
       }
     }
 
-      if (!cancelled) {
-        setNotes(entries)
-        setInitialLoading(false)
-      }
-    }
-
-    loadNotes()
+    load()
     return () => { cancelled = true }
-  }, [fingerprint, tree])
-
-  // Collect all unique tags
-  const allTags = useMemo(() => {
-    const tagSet = new Set<string>()
-    for (const note of notes) {
-      for (const tag of note.tags) {
-        tagSet.add(tag)
-      }
-    }
-    return [...tagSet].sort((a, b) => a.localeCompare(b))
   }, [notes])
 
-  // Filter and sort
-  const filteredNotes = useMemo(() => {
-    let result = notes
-    if (selectedTags.size > 0) {
-      const tagsArray = [...selectedTags]
-      result = result.filter((note) =>
-        tagsArray.every((tag) => note.tags.includes(tag)),
-      )
+  // Merge tree-derived notes with async-loaded fields
+  const enrichedNotes = useMemo<NoteEntry[]>(() => {
+    if (fieldsByPath.size === 0) return notes
+    return notes.map((n) => {
+      const f = fieldsByPath.get(n.path)
+      return f ? { ...n, fields: f } : n
+    })
+  }, [notes, fieldsByPath])
+
+  // Collect all unique frontmatter property keys across all notes
+  const allPropertyKeys = useMemo<string[]>(() => {
+    const keys = new Set<string>()
+    for (const fields of fieldsByPath.values()) {
+      for (const k of Object.keys(fields)) keys.add(k)
     }
-    result = [...result].sort((a, b) => {
-      let cmp = 0
-      if (sortField === 'name') {
-        cmp = a.name.localeCompare(b.name)
-      } else if (sortField === 'folder') {
-        cmp = a.folder.localeCompare(b.folder)
+    return Array.from(keys).sort()
+  }, [fieldsByPath])
+
+  // Filterable categories: "folder" + all frontmatter keys
+  const filterCategories = useMemo<string[]>(() => {
+    return ['folder', ...allPropertyKeys]
+  }, [allPropertyKeys])
+
+  // All unique values per category, across all enriched notes
+  const valuesByCategory = useMemo<Record<string, string[]>>(() => {
+    const result: Record<string, Set<string>> = {}
+    for (const cat of filterCategories) result[cat] = new Set()
+    for (const note of enrichedNotes) {
+      for (const cat of filterCategories) {
+        for (const v of getColumnValues(note, cat)) {
+          if (v) result[cat]?.add(v)
+        }
+      }
+    }
+    const out: Record<string, string[]> = {}
+    for (const [cat, set] of Object.entries(result)) {
+      out[cat] = Array.from(set).sort((a, b) => a.localeCompare(b))
+    }
+    return out
+  }, [filterCategories, enrichedNotes])
+
+  const visibleColumns = config.visibleColumns
+  const columnWidths = config.columnWidths
+  const filters = config.filters
+  const sortField = config.sort.field
+  const sortDir = config.sort.dir
+  const [page, setPage] = useState(0)
+  const [saveDialogOpen, setSaveDialogOpen] = useState(false)
+  const [saveName, setSaveName] = useState('')
+  const saveInputRef = useRef<HTMLInputElement>(null)
+  const [filterCategory, setFilterCategory] = useState<string | null>(null)
+
+  const handleSaveClick = useCallback(() => {
+    if (isDefaultBase) {
+      setSaveName('')
+      setSaveDialogOpen(true)
     } else {
-        cmp = a.mtimeMs - b.mtimeMs
+      onSave(null)
+    }
+  }, [isDefaultBase, onSave])
+
+  const handleSaveConfirm = useCallback(() => {
+    const name = saveName.trim()
+    if (!name) return
+    setSaveDialogOpen(false)
+    onSave(name)
+  }, [saveName, onSave])
+
+  const getColWidth = useCallback((col: string) => {
+    return columnWidths[col] ?? DEFAULT_WIDTHS[col] ?? DEFAULT_FRONTMATTER_WIDTH
+  }, [columnWidths])
+
+  // Column resize via drag
+  const resizingRef = useRef<{ col: string; startX: number; startW: number } | null>(null)
+
+  const configRef = useRef(config)
+  configRef.current = config
+
+  const onResizeStart = useCallback((col: string, e: React.MouseEvent) => {
+    e.preventDefault()
+    e.stopPropagation()
+    const startX = e.clientX
+    const startW = configRef.current.columnWidths[col] ?? DEFAULT_WIDTHS[col] ?? DEFAULT_FRONTMATTER_WIDTH
+    resizingRef.current = { col, startX, startW }
+
+    const onMouseMove = (ev: MouseEvent) => {
+      if (!resizingRef.current) return
+      const delta = ev.clientX - resizingRef.current.startX
+      const newW = Math.max(60, resizingRef.current.startW + delta)
+      const c = configRef.current
+      const updated = { ...c, columnWidths: { ...c.columnWidths, [resizingRef.current!.col]: newW } }
+      onConfigChange(updated)
+    }
+
+    const onMouseUp = () => {
+      resizingRef.current = null
+      document.removeEventListener('mousemove', onMouseMove)
+      document.removeEventListener('mouseup', onMouseUp)
+    }
+
+    document.addEventListener('mousemove', onMouseMove)
+    document.addEventListener('mouseup', onMouseUp)
+  }, [onConfigChange])
+
+  // Search
+  const [searchOpen, setSearchOpen] = useState(false)
+  const [searchQuery, setSearchQuery] = useState('')
+  const debouncedSearch = useDebounce(searchQuery, 250)
+  const [searchMatchPaths, setSearchMatchPaths] = useState<Set<string> | null>(null)
+  const searchInputRef = useRef<HTMLInputElement>(null)
+
+  useEffect(() => {
+    if (!debouncedSearch.trim()) {
+      setSearchMatchPaths(null)
+      return
+    }
+    let cancelled = false
+    window.ipc.invoke('search:query', { query: debouncedSearch, limit: 200, types: ['knowledge'] })
+      .then((res: { results: { path: string }[] }) => {
+        if (!cancelled) {
+          setSearchMatchPaths(new Set(res.results.map((r) => r.path)))
+        }
+      })
+      .catch(() => {
+        if (!cancelled) setSearchMatchPaths(new Set())
+      })
+    return () => { cancelled = true }
+  }, [debouncedSearch])
+
+  const toggleSearch = useCallback(() => {
+    setSearchOpen((prev) => {
+      if (prev) {
+        setSearchQuery('')
+        setSearchMatchPaths(null)
+      }
+      return !prev
+    })
+  }, [])
+
+  // Focus input when search opens
+  useEffect(() => {
+    if (searchOpen) searchInputRef.current?.focus()
+  }, [searchOpen])
+
+  // Reset page when filters or search change
+  useEffect(() => { setPage(0) }, [filters, searchMatchPaths])
+
+  // Filter (search + badge filters)
+  const filteredNotes = useMemo(() => {
+    let result = enrichedNotes
+    // Apply search filter
+    if (searchMatchPaths) {
+      result = result.filter((note) => searchMatchPaths.has(note.path))
+    }
+    // Apply badge filters
+    if (filters.length > 0) {
+      const byCategory = new Map<string, string[]>()
+      for (const f of filters) {
+        const vals = byCategory.get(f.category) ?? []
+        vals.push(f.value)
+        byCategory.set(f.category, vals)
+      }
+      result = result.filter((note) => {
+        for (const [category, requiredValues] of byCategory) {
+          const noteValues = getColumnValues(note, category)
+          if (!requiredValues.some((v) => noteValues.includes(v))) return false
+        }
+        return true
+      })
+    }
+    return result
+  }, [enrichedNotes, filters, searchMatchPaths])
+
+  // Sort
+  const sortedNotes = useMemo(() => {
+    return [...filteredNotes].sort((a, b) => {
+      const va = getSortValue(a, sortField)
+      const vb = getSortValue(b, sortField)
+      let cmp: number
+      if (typeof va === 'number' && typeof vb === 'number') {
+        cmp = va - vb
+      } else {
+        cmp = String(va).localeCompare(String(vb))
       }
       return sortDir === 'asc' ? cmp : -cmp
     })
-    return result
-  }, [notes, selectedTags, sortField, sortDir])
+  }, [filteredNotes, sortField, sortDir])
 
-  const toggleTag = useCallback((tag: string) => {
-    setSelectedTags((prev) => {
-      const next = new Set(prev)
-      if (next.has(tag)) {
-        next.delete(tag)
-      } else {
-        next.add(tag)
-      }
-      return next
-    })
-  }, [])
+  // Paginate
+  const totalPages = Math.max(1, Math.ceil(sortedNotes.length / PAGE_SIZE))
+  const clampedPage = Math.min(page, totalPages - 1)
+  const pageNotes = useMemo(
+    () => sortedNotes.slice(clampedPage * PAGE_SIZE, (clampedPage + 1) * PAGE_SIZE),
+    [sortedNotes, clampedPage],
+  )
+
+  const toggleFilter = useCallback((category: string, value: string) => {
+    const c = configRef.current
+    const f: ActiveFilter = { category, value }
+    const next = hasFilter(c.filters, f)
+      ? c.filters.filter((x) => !filtersEqual(x, f))
+      : [...c.filters, f]
+    onConfigChange({ ...c, filters: next })
+  }, [onConfigChange])
 
   const clearFilters = useCallback(() => {
-    setSelectedTags(new Set())
-  }, [])
+    onConfigChange({ ...configRef.current, filters: [] })
+  }, [onConfigChange])
 
-  const handleSort = useCallback((field: SortField) => {
-    setSortField((prev) => {
-      if (prev === field) {
-        setSortDir((d) => (d === 'asc' ? 'desc' : 'asc'))
-        return prev
+  const handleSort = useCallback((field: string) => {
+    const c = configRef.current
+    if (field === c.sort.field) {
+      onConfigChange({ ...c, sort: { field, dir: c.sort.dir === 'asc' ? 'desc' : 'asc' } })
+    } else {
+      onConfigChange({ ...c, sort: { field, dir: field === 'mtimeMs' ? 'desc' : 'asc' } })
     }
-      setSortDir(field === 'mtimeMs' ? 'desc' : 'asc')
-      return field
-    })
-  }, [])
+  }, [onConfigChange])
 
-  const SortIcon = ({ field }: { field: SortField }) => {
+  const toggleColumn = useCallback((key: string) => {
+    const c = configRef.current
+    const next = c.visibleColumns.includes(key)
+      ? c.visibleColumns.filter((col) => col !== key)
+      : [...c.visibleColumns, key]
+    onConfigChange({ ...c, visibleColumns: next })
+  }, [onConfigChange])
+
+  const SortIcon = ({ field }: { field: string }) => {
     if (sortField !== field) return null
-    return sortDir === 'asc' ? (
-      <ArrowUp className="size-3 inline ml-1" />
-    ) : (
-      <ArrowDown className="size-3 inline ml-1" />
-    )
-  }
-
-  if (initialLoading) {
-    return (
-      <div className="flex-1 flex items-center justify-center">
-        <div className="space-y-3 w-full max-w-2xl px-6">
-          {Array.from({ length: 8 }).map((_, i) => (
-            <div key={i} className="h-10 rounded bg-muted/50 animate-pulse" />
-          ))}
-        </div>
-      </div>
-    )
+    return sortDir === 'asc'
+      ? <ArrowUp className="size-3 inline ml-1" />
+      : <ArrowDown className="size-3 inline ml-1" />
   }
 
   return (
     <div className="flex-1 flex flex-col overflow-hidden">
-      {/* Filter bar */}
-      <div className="shrink-0 border-b border-border px-4 py-2.5">
-        <div className="flex items-center gap-2 flex-wrap">
-          <span className="text-xs text-muted-foreground shrink-0">
-            Showing {filteredNotes.length} of {notes.length} notes
+      {/* Toolbar */}
+      <div className="shrink-0 border-b border-border px-4 py-2 flex items-center gap-3">
+        <Popover>
+          <PopoverTrigger asChild>
+            <button className="inline-flex items-center gap-1.5 text-xs text-muted-foreground hover:text-foreground">
+              <ListFilter className="size-3.5" />
+              Properties
+            </button>
+          </PopoverTrigger>
+          <PopoverContent align="start" className="w-56 p-0">
+            <Command>
+              <CommandInput placeholder="Search properties..." />
+              <CommandList>
+                <CommandEmpty>No properties found.</CommandEmpty>
+                <CommandGroup heading="Built-in">
+                  {BUILTIN_COLUMNS.map((col) => (
+                    <CommandItem key={col} onSelect={() => toggleColumn(col)}>
+                      <Check className={cn('size-3.5 mr-2', visibleColumns.includes(col) ? 'opacity-100' : 'opacity-0')} />
+                      {BUILTIN_LABELS[col]}
+                    </CommandItem>
+                  ))}
+                </CommandGroup>
+                <CommandGroup heading="Frontmatter">
+                  {allPropertyKeys.map((key) => (
+                    <CommandItem key={key} onSelect={() => toggleColumn(key)}>
+                      <Check className={cn('size-3.5 mr-2', visibleColumns.includes(key) ? 'opacity-100' : 'opacity-0')} />
+                      {toTitleCase(key)}
+                    </CommandItem>
+                  ))}
+                </CommandGroup>
+              </CommandList>
+            </Command>
+          </PopoverContent>
+        </Popover>
+
+        <Popover onOpenChange={(open) => { if (!open) setFilterCategory(null) }}>
+          <PopoverTrigger asChild>
+            <button className={cn(
+              'inline-flex items-center gap-1.5 text-xs text-muted-foreground hover:text-foreground',
+              filters.length > 0 && 'text-foreground',
+            )}>
+              <Filter className="size-3.5" />
+              Filter
+              {filters.length > 0 && (
+                <span className="rounded-full bg-primary text-primary-foreground px-1.5 text-[10px] font-medium leading-tight">
+                  {filters.length}
                 </span>
-          {selectedTags.size > 0 && (
+              )}
+            </button>
+          </PopoverTrigger>
+          <PopoverContent align="start" className={cn('p-0', filterCategory ? 'w-[420px]' : 'w-[200px]')}>
+            <div className="flex h-[300px]">
+              {/* Left: categories */}
+              <div className={cn('overflow-auto', filterCategory ? 'w-[160px] border-r border-border' : 'flex-1')}>
+                <div className="flex items-center justify-between px-2 py-1.5">
+                  <span className="text-[10px] font-medium text-muted-foreground uppercase tracking-wider">Attributes</span>
+                  {filters.length > 0 && (
                     <button
                       onClick={clearFilters}
-              className="text-xs text-muted-foreground hover:text-foreground flex items-center gap-1 shrink-0"
+                      className="text-[10px] text-muted-foreground hover:text-foreground"
+                    >
+                      Reset
+                    </button>
+                  )}
+                </div>
+                {filterCategories.map((cat) => {
+                  const activeCount = filters.filter((f) => f.category === cat).length
+                  const isSelected = filterCategory === cat
+                  return (
+                    <button
+                      key={cat}
+                      onClick={() => setFilterCategory(cat)}
+                      className={cn(
+                        'w-full flex items-center gap-1.5 px-2 py-1.5 text-xs text-left hover:bg-accent transition-colors',
+                        isSelected && 'bg-accent text-foreground',
+                        !isSelected && 'text-muted-foreground',
+                      )}
+                    >
+                      <span className="flex-1 truncate">{toTitleCase(cat)}</span>
+                      {activeCount > 0 && (
+                        <span className="rounded-full bg-primary text-primary-foreground px-1.5 text-[10px] font-medium leading-tight shrink-0">
+                          {activeCount}
+                        </span>
+                      )}
+                    </button>
+                  )
+                })}
+              </div>
+              {/* Right: values for selected category */}
+              {filterCategory && (
+                <div className="flex-1 min-w-0 flex flex-col">
+                  <Command className="flex-1 flex flex-col">
+                    <CommandInput placeholder={`Search ${toTitleCase(filterCategory).toLowerCase()}...`} />
+                    <CommandList className="flex-1 overflow-auto max-h-none">
+                      <CommandEmpty>No values found.</CommandEmpty>
+                      <CommandGroup>
+                        {(valuesByCategory[filterCategory] ?? []).map((val) => {
+                          const active = hasFilter(filters, { category: filterCategory, value: val })
+                          return (
+                            <CommandItem key={val} onSelect={() => toggleFilter(filterCategory, val)}>
+                              <Check className={cn('size-3.5 mr-2 shrink-0', active ? 'opacity-100' : 'opacity-0')} />
+                              <span className="truncate">{val}</span>
+                            </CommandItem>
+                          )
+                        })}
+                      </CommandGroup>
+                    </CommandList>
+                  </Command>
+                </div>
+              )}
+            </div>
+          </PopoverContent>
+        </Popover>
+
+        <button
+          onClick={toggleSearch}
+          className={cn(
+            'inline-flex items-center gap-1.5 text-xs text-muted-foreground hover:text-foreground shrink-0',
+            searchOpen && 'text-foreground',
+          )}
+        >
+          <Search className="size-3.5" />
+          Search
+        </button>
+
+        {searchOpen && (
+          <div className="flex items-center gap-2 flex-1 min-w-0">
+            <input
+              ref={searchInputRef}
+              type="text"
+              value={searchQuery}
+              onChange={(e) => setSearchQuery(e.target.value)}
+              placeholder="Search notes..."
+              className="flex-1 min-w-0 bg-transparent text-xs text-foreground placeholder:text-muted-foreground outline-none"
+            />
+            {searchQuery && (
+              <span className="text-[10px] text-muted-foreground shrink-0">
+                {searchMatchPaths ? `${searchMatchPaths.size} matches` : '...'}
+              </span>
+            )}
+            <button
+              onClick={toggleSearch}
+              className="text-muted-foreground hover:text-foreground shrink-0"
             >
               <X className="size-3" />
-              Clear filters
             </button>
+          </div>
         )}
-          <div className="flex items-center gap-1 flex-wrap">
-            {allTags.map((tag) => (
+
+        <div className="flex-1" />
+
         <button
-                key={tag}
-                onClick={() => toggleTag(tag)}
-                className={cn(
-                  'inline-flex items-center rounded-full border px-2 py-0.5 text-[11px] font-medium transition-colors',
-                  selectedTags.has(tag)
-                    ? 'bg-primary text-primary-foreground border-transparent'
-                    : 'bg-transparent text-muted-foreground border-border hover:bg-accent hover:text-accent-foreground',
-                )}
+          onClick={handleSaveClick}
+          className="inline-flex items-center gap-1.5 text-xs text-muted-foreground hover:text-foreground shrink-0"
         >
-                {tag}
+          <Save className="size-3.5" />
+          {isDefaultBase ? 'Save As' : 'Save'}
+        </button>
+      </div>
+
+      {/* Filter bar */}
+      {filters.length > 0 && (
+        <div className="shrink-0 border-b border-border px-4 py-2">
+          <div className="flex items-center gap-2 flex-wrap">
+            <span className="text-xs text-muted-foreground shrink-0">
+              {sortedNotes.length} of {enrichedNotes.length} notes
+            </span>
+            {filters.map((f) => (
+              <button
+                key={`${f.category}:${f.value}`}
+                onClick={() => toggleFilter(f.category, f.value)}
+                className="inline-flex items-center gap-1 rounded-full bg-primary text-primary-foreground px-2 py-0.5 text-[11px] font-medium"
+              >
+                <span className="text-primary-foreground/60">{f.category}:</span>
+                {f.value}
+                <X className="size-3" />
               </button>
             ))}
+            <button onClick={clearFilters} className="text-xs text-muted-foreground hover:text-foreground">
+              Clear all
+            </button>
           </div>
         </div>
-      </div>
+      )}
 
       {/* Table */}
       <div className="flex-1 overflow-auto">
-        <table className="w-full text-sm">
-          <thead className="sticky top-0 bg-background border-b border-border">
+        <table className="w-full text-sm" style={{ tableLayout: 'fixed' }}>
+          <colgroup>
+            {visibleColumns.map((col) => (
+              <col key={col} style={{ width: getColWidth(col) }} />
+            ))}
+          </colgroup>
+          <thead className="sticky top-0 bg-background border-b border-border z-10">
             <tr>
+              {visibleColumns.map((col) => (
                 <th
-                className="text-left px-4 py-2 font-medium text-muted-foreground cursor-pointer hover:text-foreground select-none"
-                onClick={() => handleSort('name')}
+                  key={col}
+                  className="relative text-left px-4 py-2 font-medium text-muted-foreground cursor-pointer hover:text-foreground select-none group"
+                  onClick={() => handleSort(col)}
                 >
-                Name
-                <SortIcon field="name" />
-              </th>
-              <th
-                className="text-left px-4 py-2 font-medium text-muted-foreground cursor-pointer hover:text-foreground select-none"
-                onClick={() => handleSort('folder')}
-              >
-                Folder
-                <SortIcon field="folder" />
-              </th>
-              <th className="text-left px-4 py-2 font-medium text-muted-foreground select-none">
-                Tags
-              </th>
-              <th
-                className="text-left px-4 py-2 font-medium text-muted-foreground cursor-pointer hover:text-foreground select-none"
-                onClick={() => handleSort('mtimeMs')}
-              >
-                Last Modified
-                <SortIcon field="mtimeMs" />
+                  <span className="truncate block">{toTitleCase(col)}<SortIcon field={col} /></span>
+                  {/* Resize handle */}
+                  <div
+                    className="absolute right-0 top-0 bottom-0 w-1.5 cursor-col-resize opacity-0 group-hover:opacity-100 hover:!opacity-100 bg-border/60"
+                    onMouseDown={(e) => onResizeStart(col, e)}
+                    onClick={(e) => e.stopPropagation()}
+                  />
                 </th>
+              ))}
             </tr>
           </thead>
           <tbody>
-            {filteredNotes.map((note) => (
+            {pageNotes.map((note) => (
               <tr
                 key={note.path}
                 className="border-b border-border/50 hover:bg-accent/50 cursor-pointer transition-colors"
                 onClick={() => onSelectNote(note.path)}
               >
-                <td className="px-4 py-2 font-medium">{note.name}</td>
-                <td className="px-4 py-2 text-muted-foreground">{note.folder}</td>
-                <td className="px-4 py-2">
-                  <div className="flex items-center gap-1 flex-wrap">
-                    {note.tags.map((tag) => (
-                      <Badge
-                        key={tag}
-                        variant="secondary"
-                        className="text-[10px] px-1.5 py-0 cursor-pointer hover:bg-primary hover:text-primary-foreground"
-                        onClick={(e) => {
-                          e.stopPropagation()
-                          toggleTag(tag)
-                        }}
-                      >
-                        {tag}
-                      </Badge>
+                {visibleColumns.map((col) => (
+                  <td key={col} className="px-4 py-2 overflow-hidden">
+                    <CellRenderer
+                      note={note}
+                      column={col}
+                      filters={filters}
+                      toggleFilter={toggleFilter}
+                    />
+                  </td>
                 ))}
-                  </div>
-                </td>
-                <td className="px-4 py-2 text-muted-foreground whitespace-nowrap">
-                  {formatDate(note.mtimeMs)}
-                </td>
               </tr>
             ))}
-            {filteredNotes.length === 0 && (
+            {pageNotes.length === 0 && (
               <tr>
-                <td colSpan={4} className="px-4 py-8 text-center text-muted-foreground">
+                <td colSpan={visibleColumns.length} className="px-4 py-8 text-center text-muted-foreground">
                   No notes found
                 </td>
               </tr>
@@ -305,6 +669,152 @@ export function BasesView({ tree, onSelectNote }: BasesViewProps) {
           </tbody>
         </table>
       </div>
+
+      {/* Pagination */}
+      <div className="shrink-0 border-t border-border px-4 py-2 flex items-center justify-between">
+        <span className="text-xs text-muted-foreground">
+          {sortedNotes.length === 0
+            ? '0 notes'
+            : `${clampedPage * PAGE_SIZE + 1}\u2013${Math.min((clampedPage + 1) * PAGE_SIZE, sortedNotes.length)} of ${sortedNotes.length}`}
+        </span>
+        {totalPages > 1 && (
+          <div className="flex items-center gap-1">
+            <button
+              disabled={clampedPage === 0}
+              onClick={() => setPage((p) => Math.max(0, p - 1))}
+              className="flex h-7 w-7 items-center justify-center rounded-md text-muted-foreground hover:bg-accent hover:text-foreground disabled:opacity-30 disabled:pointer-events-none"
+            >
+              <ChevronLeft className="size-4" />
+            </button>
+            <span className="text-xs text-muted-foreground px-2">
+              Page {clampedPage + 1} of {totalPages}
+            </span>
+            <button
+              disabled={clampedPage >= totalPages - 1}
+              onClick={() => setPage((p) => Math.min(totalPages - 1, p + 1))}
+              className="flex h-7 w-7 items-center justify-center rounded-md text-muted-foreground hover:bg-accent hover:text-foreground disabled:opacity-30 disabled:pointer-events-none"
+            >
+              <ChevronRight className="size-4" />
+            </button>
+          </div>
+        )}
+      </div>
+
+      {/* Save As dialog */}
+      <Dialog open={saveDialogOpen} onOpenChange={setSaveDialogOpen}>
+        <DialogContent className="sm:max-w-[360px]">
+          <DialogHeader>
+            <DialogTitle>Save Base</DialogTitle>
+            <DialogDescription>Choose a name for this base view.</DialogDescription>
+          </DialogHeader>
+          <input
+            ref={saveInputRef}
+            type="text"
+            value={saveName}
+            onChange={(e) => setSaveName(e.target.value)}
+            onKeyDown={(e) => { if (e.key === 'Enter') handleSaveConfirm() }}
+            placeholder="e.g. Contacts, Projects..."
+            className="w-full rounded-md border border-border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-ring"
+            autoFocus
+          />
+          <DialogFooter>
+            <button
+              onClick={() => setSaveDialogOpen(false)}
+              className="rounded-md px-3 py-1.5 text-sm text-muted-foreground hover:text-foreground"
+            >
+              Cancel
+            </button>
+            <button
+              onClick={handleSaveConfirm}
+              disabled={!saveName.trim()}
+              className="rounded-md bg-primary px-3 py-1.5 text-sm text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
+            >
+              Save
+            </button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
     </div>
   )
 }
+
+/** Renders a single table cell based on the column type */
+function CellRenderer({
+  note,
+  column,
+  filters,
+  toggleFilter,
+}: {
+  note: NoteEntry
+  column: string
+  filters: ActiveFilter[]
+  toggleFilter: (category: string, value: string) => void
+}) {
+  if (column === 'name') {
+    return <span className="font-medium truncate block">{note.name}</span>
+  }
+  if (column === 'folder') {
+    return <span className="text-muted-foreground truncate block">{note.folder}</span>
+  }
+  if (column === 'mtimeMs') {
+    return <span className="text-muted-foreground whitespace-nowrap truncate block">{formatDate(note.mtimeMs)}</span>
+  }
+
+  // Frontmatter column
+  const value = note.fields[column]
+  if (!value) return null
+
+  if (Array.isArray(value)) {
+    return (
+      <div className="flex items-center gap-1 flex-wrap">
+        {value.map((v) => (
+          <CategoryBadge
+            key={v}
+            category={column}
+            value={v}
+            active={hasFilter(filters, { category: column, value: v })}
+            onClick={toggleFilter}
+          />
+        ))}
+      </div>
+    )
+  }
+
+  // Single string value — render as badge for filterability
+  return (
+    <CategoryBadge
+      category={column}
+      value={value}
+      active={hasFilter(filters, { category: column, value })}
+      onClick={toggleFilter}
+    />
+  )
+}
+
+function CategoryBadge({
+  category,
+  value,
+  active,
+  onClick,
+}: {
+  category: string
+  value: string
+  active: boolean
+  onClick: (category: string, value: string) => void
+}) {
+  return (
+    <Badge
+      variant={active ? 'default' : 'secondary'}
+      className={cn(
+        'text-[10px] px-1.5 py-0 cursor-pointer',
+        !active && 'hover:bg-primary hover:text-primary-foreground',
+      )}
+      onClick={(e) => {
+        e.stopPropagation()
+        onClick(category, value)
+      }}
+    >
+      {value}
+    </Badge>
+  )
+}

apps/x/apps/renderer/src/components/frontmatter-properties.tsx

@@ -0,0 +1,252 @@
+import { useState, useCallback, useRef, useEffect } from 'react'
+import { ChevronRight, X, Plus } from 'lucide-react'
+import { extractAllFrontmatterValues, buildFrontmatter } from '@/lib/frontmatter'
+
+interface FrontmatterPropertiesProps {
+  raw: string | null
+  onRawChange: (raw: string | null) => void
+  editable?: boolean
+}
+
+type FieldEntry = { key: string; value: string | string[] }
+
+function fieldsFromRaw(raw: string | null): FieldEntry[] {
+  const record = extractAllFrontmatterValues(raw)
+  return Object.entries(record).map(([key, value]) => ({ key, value }))
+}
+
+function fieldsToRaw(fields: FieldEntry[]): string | null {
+  const record: Record<string, string | string[]> = {}
+  for (const { key, value } of fields) {
+    if (key.trim()) record[key.trim()] = value
+  }
+  return buildFrontmatter(record)
+}
+
+export function FrontmatterProperties({ raw, onRawChange, editable = true }: FrontmatterPropertiesProps) {
+  const [expanded, setExpanded] = useState(false)
+  const [fields, setFields] = useState<FieldEntry[]>(() => fieldsFromRaw(raw))
+  const [editingNewKey, setEditingNewKey] = useState(false)
+  const newKeyRef = useRef<HTMLInputElement>(null)
+  const lastCommittedRaw = useRef(raw)
+
+  // Sync local fields when raw changes externally (e.g. tab switch)
+  useEffect(() => {
+    if (raw !== lastCommittedRaw.current) {
+      setFields(fieldsFromRaw(raw))
+      lastCommittedRaw.current = raw
+    }
+  }, [raw])
+
+  useEffect(() => {
+    if (editingNewKey && newKeyRef.current) {
+      newKeyRef.current.focus()
+    }
+  }, [editingNewKey])
+
+  const commit = useCallback((updated: FieldEntry[]) => {
+    const newRaw = fieldsToRaw(updated)
+    lastCommittedRaw.current = newRaw
+    onRawChange(newRaw)
+  }, [onRawChange])
+
+  // For scalar fields: update local state immediately, commit on blur
+  const updateLocalValue = useCallback((index: number, newValue: string) => {
+    setFields(prev => {
+      const next = [...prev]
+      next[index] = { ...next[index], value: newValue }
+      return next
+    })
+  }, [])
+
+  const commitField = useCallback((index: number) => {
+    setFields(prev => {
+      commit(prev)
+      return prev
+    })
+  }, [commit])
+
+  // For array fields and structural changes: update + commit immediately
+  const updateAndCommit = useCallback((updater: (prev: FieldEntry[]) => FieldEntry[]) => {
+    setFields(prev => {
+      const next = updater(prev)
+      commit(next)
+      return next
+    })
+  }, [commit])
+
+  const removeField = useCallback((index: number) => {
+    updateAndCommit(prev => prev.filter((_, i) => i !== index))
+  }, [updateAndCommit])
+
+  const addField = useCallback((key: string) => {
+    const trimmed = key.trim()
+    if (!trimmed) return
+    if (fields.some(f => f.key === trimmed)) return
+    updateAndCommit(prev => [...prev, { key: trimmed, value: '' }])
+    setEditingNewKey(false)
+  }, [fields, updateAndCommit])
+
+  const count = fields.length
+
+  return (
+    <div className="frontmatter-properties">
+      <button
+        className="frontmatter-toggle"
+        onClick={() => setExpanded(!expanded)}
+        type="button"
+      >
+        <ChevronRight
+          size={14}
+          className={`frontmatter-chevron ${expanded ? 'expanded' : ''}`}
+        />
+        <span className="frontmatter-label">
+          Properties{count > 0 ? ` (${count})` : ''}
+        </span>
+      </button>
+
+      {expanded && (
+        <div className="frontmatter-fields">
+          {fields.map((field, index) => (
+            <div key={`${field.key}-${index}`} className="frontmatter-row">
+              <span className="frontmatter-key" title={field.key}>
+                {field.key}
+              </span>
+              <div className="frontmatter-value-area">
+                {Array.isArray(field.value) ? (
+                  <ArrayField
+                    value={field.value}
+                    editable={editable}
+                    onChange={(v) => updateAndCommit(prev => {
+                      const next = [...prev]
+                      next[index] = { ...next[index], value: v }
+                      return next
+                    })}
+                  />
+                ) : (
+                  <input
+                    className="frontmatter-input"
+                    value={field.value}
+                    readOnly={!editable}
+                    onChange={(e) => updateLocalValue(index, e.target.value)}
+                    onBlur={() => commitField(index)}
+                    onKeyDown={(e) => {
+                      if (e.key === 'Enter') {
+                        e.currentTarget.blur()
+                      }
+                    }}
+                  />
+                )}
+              </div>
+              {editable && (
+                <button
+                  className="frontmatter-remove"
+                  onClick={() => removeField(index)}
+                  type="button"
+                  title="Remove property"
+                >
+                  <X size={12} />
+                </button>
+              )}
+            </div>
+          ))}
+
+          {editable && (
+            editingNewKey ? (
+              <div className="frontmatter-row frontmatter-new-row">
+                <input
+                  ref={newKeyRef}
+                  className="frontmatter-input frontmatter-new-key-input"
+                  placeholder="Property name"
+                  onKeyDown={(e) => {
+                    if (e.key === 'Enter') {
+                      addField(e.currentTarget.value)
+                    } else if (e.key === 'Escape') {
+                      setEditingNewKey(false)
+                    }
+                  }}
+                  onBlur={(e) => {
+                    if (e.currentTarget.value.trim()) {
+                      addField(e.currentTarget.value)
+                    } else {
+                      setEditingNewKey(false)
+                    }
+                  }}
+                />
+              </div>
+            ) : (
+              <button
+                className="frontmatter-add"
+                onClick={() => setEditingNewKey(true)}
+                type="button"
+              >
+                <Plus size={12} />
+                <span>Add property</span>
+              </button>
+            )
+          )}
+        </div>
+      )}
+    </div>
+  )
+}
+
+function ArrayField({
+  value,
+  editable,
+  onChange,
+}: {
+  value: string[]
+  editable: boolean
+  onChange: (v: string[]) => void
+}) {
+  const removeItem = (index: number) => {
+    onChange(value.filter((_, i) => i !== index))
+  }
+
+  const addItem = (text: string) => {
+    const trimmed = text.trim()
+    if (!trimmed) return
+    onChange([...value, trimmed])
+  }
+
+  return (
+    <div className="frontmatter-array">
+      {value.map((item, i) => (
+        <span key={i} className="frontmatter-chip">
+          <span className="frontmatter-chip-text">{item}</span>
+          {editable && (
+            <button
+              className="frontmatter-chip-remove"
+              onClick={() => removeItem(i)}
+              type="button"
+            >
+              <X size={10} />
+            </button>
+          )}
+        </span>
+      ))}
+      {editable && (
+        <input
+          className="frontmatter-chip-input"
+          placeholder="Add..."
+          onKeyDown={(e) => {
+            if (e.key === 'Enter' || e.key === ',') {
+              e.preventDefault()
+              addItem(e.currentTarget.value)
+              e.currentTarget.value = ''
+            } else if (e.key === 'Backspace' && !e.currentTarget.value && value.length > 0) {
+              removeItem(value.length - 1)
+            }
+          }}
+          onBlur={(e) => {
+            if (e.currentTarget.value.trim()) {
+              addItem(e.currentTarget.value)
+              e.currentTarget.value = ''
+            }
+          }}
+        />
+      )}
+    </div>
+  )
+}

apps/x/apps/renderer/src/components/markdown-editor.tsx

@@ -176,7 +176,7 @@ function getMarkdownWithBlankLines(editor: Editor): string {
   return result
 }
 import { EditorToolbar } from './editor-toolbar'
-import { TagPills } from './tag-pills'
+import { FrontmatterProperties } from './frontmatter-properties'
 import { WikiLink } from '@/extensions/wiki-link'
 import { Popover, PopoverAnchor, PopoverContent } from '@/components/ui/popover'
 import { Command, CommandEmpty, CommandItem, CommandList } from '@/components/ui/command'
@@ -201,7 +201,8 @@ interface MarkdownEditorProps {
   editorSessionKey?: number
   onHistoryHandlersChange?: (handlers: { undo: () => boolean; redo: () => boolean } | null) => void
   editable?: boolean
-  tags?: string[]
+  frontmatter?: string | null
+  onFrontmatterChange?: (raw: string | null) => void
 }
 
 type WikiLinkMatch = {
@@ -290,7 +291,8 @@ export function MarkdownEditor({
   editorSessionKey = 0,
   onHistoryHandlersChange,
   editable = true,
-  tags,
+  frontmatter,
+  onFrontmatterChange,
 }: MarkdownEditorProps) {
   const isInternalUpdate = useRef(false)
   const wrapperRef = useRef<HTMLDivElement>(null)
@@ -724,7 +726,13 @@ export function MarkdownEditor({
         onSelectionHighlight={setSelectionHighlight}
         onImageUpload={handleImageUploadWithPlaceholder}
       />
-      {tags && <TagPills tags={tags} />}
+      {(frontmatter !== undefined) && onFrontmatterChange && (
+        <FrontmatterProperties
+          raw={frontmatter}
+          onRawChange={onFrontmatterChange}
+          editable={editable}
+        />
+      )}
       <div className="editor-content-wrapper" ref={wrapperRef} onScroll={handleScroll}>
         <EditorContent editor={editor} />
         {wikiLinks ? (

apps/x/apps/renderer/src/components/sidebar-content.tsx

@@ -16,6 +16,7 @@ import {
   Mic,
   Network,
   Pencil,
+  Table2,
   Plug,
   LoaderIcon,
   Settings,
@@ -101,6 +102,7 @@ type KnowledgeActions = {
   createNote: (parentPath?: string) => void
   createFolder: (parentPath?: string) => void
   openGraph: () => void
+  openBases: () => void
   expandAll: () => void
   collapseAll: () => void
   rename: (path: string, newName: string, isDir: boolean) => Promise<void>
@@ -855,6 +857,7 @@ function KnowledgeSection({
     { icon: FilePlus, label: "New Note", action: () => actions.createNote() },
     { icon: FolderPlus, label: "New Folder", action: () => actions.createFolder() },
     { icon: Network, label: "Graph View", action: () => actions.openGraph() },
+    { icon: Table2, label: "Bases", action: () => actions.openBases() },
   ]
 
   return (

apps/x/apps/renderer/src/components/tag-pills.tsx

@@ -1,17 +0,0 @@
-interface TagPillsProps {
-  tags: string[]
-}
-
-export function TagPills({ tags }: TagPillsProps) {
-  if (tags.length === 0) return null
-
-  return (
-    <div className="tag-pills-row">
-      {tags.map((tag, i) => (
-        <span key={`${tag}-${i}`} className="tag-pill">
-          {tag}
-        </span>
-      ))}
-    </div>
-  )
-}

apps/x/apps/renderer/src/lib/frontmatter.ts

@@ -29,6 +29,209 @@ export function joinFrontmatter(raw: string | null, body: string): string {
   return raw + '\n' + body
 }
 
+/** Structured frontmatter fields extracted from categorized YAML. */
+export type FrontmatterFields = {
+  relationship: string | null
+  relationship_sub: string[]
+  topic: string[]
+  email_type: string[]
+  action: string[]
+  status: string | null
+  source: string[]
+}
+
+/**
+ * Extract structured tag categories from raw frontmatter YAML.
+ *
+ * Handles both the new categorized format (top-level keys) and the legacy
+ * flat `tags:` list. For legacy notes the flat tags are mapped into
+ * categories using known tag values.
+ */
+export function extractFrontmatterFields(raw: string | null): FrontmatterFields {
+  const fields: FrontmatterFields = {
+    relationship: null,
+    relationship_sub: [],
+    topic: [],
+    email_type: [],
+    action: [],
+    status: null,
+    source: [],
+  }
+  if (!raw) return fields
+
+  const lines = raw.split('\n')
+  let currentKey: string | null = null
+
+  for (const line of lines) {
+    // Top-level key detection
+    const topMatch = line.match(/^(\w+):\s*(.*)$/)
+    if (topMatch || line === '---') {
+      currentKey = null
+    }
+
+    if (topMatch) {
+      const key = topMatch[1]
+      const value = topMatch[2].trim()
+
+      if (key in fields) {
+        currentKey = key
+        if (value) {
+          const field = fields[key as keyof FrontmatterFields]
+          if (Array.isArray(field)) {
+            (field as string[]).push(value)
+          } else {
+            // single-value field
+            ;(fields as Record<string, unknown>)[key] = value
+          }
+          currentKey = null // inline value, no list follows
+        }
+        continue
+      }
+
+      // Legacy flat tags: — parse and distribute into categories
+      if (key === 'tags') {
+        currentKey = '__legacy_tags'
+        continue
+      }
+    }
+
+    // List items under a categorized key
+    if (currentKey && currentKey !== '__legacy_tags') {
+      const itemMatch = line.match(/^\s+-\s+(.+)$/)
+      if (itemMatch) {
+        const value = itemMatch[1].trim()
+        const field = fields[currentKey as keyof FrontmatterFields]
+        if (Array.isArray(field)) {
+          (field as string[]).push(value)
+        } else {
+          ;(fields as Record<string, unknown>)[currentKey] = value
+        }
+      }
+      continue
+    }
+
+    // Legacy flat tag items → map into categories
+    if (currentKey === '__legacy_tags') {
+      const itemMatch = line.match(/^\s+-\s+(.+)$/)
+      if (itemMatch) {
+        const tag = itemMatch[1].trim()
+        const cat = LEGACY_TAG_TO_CATEGORY[tag]
+        if (cat) {
+          const field = fields[cat as keyof FrontmatterFields]
+          if (Array.isArray(field)) {
+            (field as string[]).push(tag)
+          } else if (!(fields as Record<string, unknown>)[cat]) {
+            ;(fields as Record<string, unknown>)[cat] = tag
+          }
+        }
+      }
+      continue
+    }
+  }
+
+  return fields
+}
+
+/**
+ * Extract ALL top-level YAML key/value pairs from raw frontmatter.
+ * Returns a flat record where scalar values are strings and list values are string[].
+ * Skips `---` delimiters and blank lines.
+ */
+export function extractAllFrontmatterValues(raw: string | null): Record<string, string | string[]> {
+  const result: Record<string, string | string[]> = {}
+  if (!raw) return result
+
+  const lines = raw.split('\n')
+  let currentKey: string | null = null
+
+  for (const line of lines) {
+    if (line === '---' || line.trim() === '') {
+      currentKey = null
+      continue
+    }
+
+    // Top-level key: value
+    const topMatch = line.match(/^(\w[\w\s]*\w|\w+):\s*(.*)$/)
+    if (topMatch) {
+      const key = topMatch[1]
+      const value = topMatch[2].trim()
+      if (value) {
+        result[key] = value
+        currentKey = null
+      } else {
+        // List will follow
+        currentKey = key
+        result[key] = []
+      }
+      continue
+    }
+
+    // List item under current key
+    if (currentKey) {
+      const itemMatch = line.match(/^\s+-\s+(.+)$/)
+      if (itemMatch) {
+        const arr = result[currentKey]
+        if (Array.isArray(arr)) {
+          arr.push(itemMatch[1].trim())
+        }
+      }
+    }
+  }
+
+  return result
+}
+
+/**
+ * Convert a Record of frontmatter fields back to a raw YAML frontmatter string.
+ * Returns null if no non-empty fields remain.
+ */
+export function buildFrontmatter(fields: Record<string, string | string[]>): string | null {
+  const lines: string[] = []
+  for (const [key, value] of Object.entries(fields)) {
+    if (Array.isArray(value)) {
+      if (value.length === 0) continue
+      lines.push(`${key}:`)
+      for (const item of value) {
+        if (item.trim()) lines.push(`  - ${item.trim()}`)
+      }
+    } else {
+      const trimmed = (value ?? '').trim()
+      if (!trimmed) continue
+      lines.push(`${key}: ${trimmed}`)
+    }
+  }
+  if (lines.length === 0) return null
+  return `---\n${lines.join('\n')}\n---`
+}
+
+/** Map known tag values → category for legacy flat-list frontmatter. */
+const LEGACY_TAG_TO_CATEGORY: Record<string, string> = {
+  // relationship
+  investor: 'relationship', customer: 'relationship', prospect: 'relationship',
+  partner: 'relationship', vendor: 'relationship', product: 'relationship',
+  candidate: 'relationship', team: 'relationship', advisor: 'relationship',
+  personal: 'relationship', press: 'relationship', community: 'relationship',
+  government: 'relationship',
+  // relationship_sub
+  primary: 'relationship_sub', secondary: 'relationship_sub',
+  'executive-assistant': 'relationship_sub', cc: 'relationship_sub',
+  'referred-by': 'relationship_sub', former: 'relationship_sub',
+  champion: 'relationship_sub', blocker: 'relationship_sub',
+  // topic
+  sales: 'topic', support: 'topic', legal: 'topic', finance: 'topic',
+  hiring: 'topic', fundraising: 'topic', travel: 'topic', event: 'topic',
+  shopping: 'topic', health: 'topic', learning: 'topic', research: 'topic',
+  // email_type
+  intro: 'email_type', followup: 'email_type',
+  // action
+  'action-required': 'action', urgent: 'action', waiting: 'action',
+  // status
+  active: 'status', archived: 'status', stale: 'status',
+  // source
+  email: 'source', meeting: 'source', browser: 'source',
+  'web-search': 'source', manual: 'source', import: 'source',
+}
+
 /** Tag category keys used in the categorized frontmatter format. */
 const TAG_CATEGORY_KEYS = new Set([
   'relationship',

apps/x/apps/renderer/src/styles/editor.css

@@ -237,34 +237,200 @@
   flex-shrink: 0;
 }
 
-/* Tag pills row shown between toolbar and editor content */
-.tag-pills-row {
-  display: flex;
-  flex-wrap: wrap;
-  gap: 4px;
-  padding: 4px 12px;
+/* Frontmatter properties panel between toolbar and editor content */
+.frontmatter-properties {
+  flex-shrink: 0;
   border-bottom: 1px solid var(--border);
   background-color: var(--background);
-  flex-shrink: 0;
-  max-height: 4.5em;
-  overflow: hidden;
+  font-size: 13px;
+  color: var(--foreground);
 }
 
-.tag-pill {
-  font-size: 11px;
-  line-height: 18px;
-  padding: 0 8px;
-  border-radius: 9999px;
+.frontmatter-toggle {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  width: 100%;
+  padding: 4px 12px;
+  background: none;
+  border: none;
+  cursor: pointer;
+  color: color-mix(in srgb, var(--foreground) 60%, transparent);
+  font-size: 12px;
+  user-select: none;
+}
+
+.frontmatter-toggle:hover {
+  color: var(--foreground);
+  background-color: color-mix(in srgb, var(--foreground) 4%, transparent);
+}
+
+.frontmatter-chevron {
+  transition: transform 0.15s ease;
+  flex-shrink: 0;
+}
+
+.frontmatter-chevron.expanded {
+  transform: rotate(90deg);
+}
+
+.frontmatter-label {
+  font-weight: 500;
+}
+
+.frontmatter-fields {
+  padding: 2px 12px 6px 30px;
+}
+
+.frontmatter-row {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-height: 28px;
+}
+
+.frontmatter-key {
+  flex-shrink: 0;
+  width: 110px;
+  font-size: 12px;
+  color: color-mix(in srgb, var(--foreground) 60%, transparent);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.frontmatter-value-area {
+  flex: 1;
+  min-width: 0;
+}
+
+.frontmatter-input {
+  width: 100%;
+  background: none;
+  border: none;
+  border-bottom: 1px solid transparent;
+  padding: 2px 4px;
+  font-size: 13px;
+  color: var(--foreground);
+  outline: none;
+}
+
+.frontmatter-input:focus {
+  border-bottom-color: var(--primary);
+}
+
+.frontmatter-input:read-only {
+  cursor: default;
+}
+
+.frontmatter-new-key-input {
+  width: 110px;
+  flex-shrink: 0;
+}
+
+.frontmatter-remove {
+  flex-shrink: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 18px;
+  height: 18px;
+  background: none;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  color: color-mix(in srgb, var(--foreground) 40%, transparent);
+  opacity: 0;
+}
+
+.frontmatter-row:hover .frontmatter-remove {
+  opacity: 1;
+}
+
+.frontmatter-remove:hover {
   background-color: color-mix(in srgb, var(--foreground) 8%, transparent);
   color: var(--foreground);
+}
+
+.frontmatter-add {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  padding: 4px 4px;
+  margin-top: 2px;
+  background: none;
+  border: none;
+  cursor: pointer;
+  font-size: 12px;
+  color: color-mix(in srgb, var(--foreground) 50%, transparent);
+}
+
+.frontmatter-add:hover {
+  color: var(--foreground);
+}
+
+/* Array field chips */
+.frontmatter-array {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 4px;
+  min-height: 24px;
+}
+
+.frontmatter-chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 2px;
+  font-size: 11px;
+  line-height: 18px;
+  padding: 0 6px;
+  border-radius: 9999px;
+  background-color: color-mix(in srgb, var(--foreground) 8%, transparent);
   white-space: nowrap;
   user-select: none;
 }
 
-.dark .tag-pill {
+.dark .frontmatter-chip {
   background-color: color-mix(in srgb, var(--foreground) 12%, transparent);
 }
 
+.frontmatter-chip-text {
+  max-width: 120px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.frontmatter-chip-remove {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: none;
+  border: none;
+  cursor: pointer;
+  padding: 0;
+  color: color-mix(in srgb, var(--foreground) 50%, transparent);
+  margin-left: 2px;
+}
+
+.frontmatter-chip-remove:hover {
+  color: var(--foreground);
+}
+
+.frontmatter-chip-input {
+  background: none;
+  border: none;
+  outline: none;
+  font-size: 12px;
+  color: var(--foreground);
+  width: 60px;
+  padding: 2px 0;
+}
+
+.frontmatter-chip-input::placeholder {
+  color: color-mix(in srgb, var(--foreground) 30%, transparent);
+}
+
 .editor-toolbar .separator {
   width: 1px;
   height: 1.5rem;