diff --git a/ui/src/components/cliproxy/provider-editor/account-item.tsx b/ui/src/components/cliproxy/provider-editor/account-item.tsx
index 2aec131d..aa19af3c 100644
--- a/ui/src/components/cliproxy/provider-editor/account-item.tsx
+++ b/ui/src/components/cliproxy/provider-editor/account-item.tsx
@@ -6,6 +6,8 @@
 import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { Progress } from '@/components/ui/progress';
+import { Switch } from '@/components/ui/switch';
+import { Checkbox } from '@/components/ui/checkbox';
 import {
   DropdownMenu,
   DropdownMenuContent,
@@ -23,10 +25,10 @@ import {
   CheckCircle2,
   HelpCircle,
   Pause,
-  Play,
   AlertCircle,
   AlertTriangle,
   FolderCode,
+  Radio,
 } from 'lucide-react';
 import {
   cn,
@@ -93,10 +95,15 @@ export function AccountItem({
   onSetDefault,
   onRemove,
   onPauseToggle,
+  onSoloMode,
   isRemoving,
   isPausingAccount,
+  isSoloingAccount,
   privacyMode,
   showQuota,
+  selectable,
+  selected,
+  onSelectChange,
 }: AccountItemProps) {
   // Fetch runtime stats to get actual lastUsedAt (more accurate than file state)
   const { data: stats } = useCliproxyStats(showQuota);
@@ -123,11 +130,20 @@ export function AccountItem({
     <div
       className={cn(
         'flex flex-col gap-2 p-3 rounded-lg border transition-colors',
-        account.isDefault ? 'border-primary/30 bg-primary/5' : 'border-border hover:bg-muted/30'
+        account.isDefault ? 'border-primary/30 bg-primary/5' : 'border-border hover:bg-muted/30',
+        account.paused && 'opacity-50 border-muted'
       )}
     >
       <div className="flex items-center justify-between">
         <div className="flex items-center gap-3">
+          {/* Multi-select checkbox */}
+          {selectable && (
+            <Checkbox
+              checked={selected}
+              onCheckedChange={(checked) => onSelectChange?.(!!checked)}
+              aria-label={`Select ${account.email || account.id}`}
+            />
+          )}
           <div
             className={cn(
               'flex items-center justify-center w-8 h-8 rounded-full',
@@ -226,47 +242,80 @@ export function AccountItem({
           </div>
         </div>
 
-        <DropdownMenu>
-          <DropdownMenuTrigger asChild>
-            <Button variant="ghost" size="icon" className="h-7 w-7">
-              <MoreHorizontal className="w-4 h-4" />
-            </Button>
-          </DropdownMenuTrigger>
-          <DropdownMenuContent align="end">
-            {!account.isDefault && (
-              <DropdownMenuItem onClick={onSetDefault}>
-                <Star className="w-4 h-4 mr-2" />
-                Set as default
-              </DropdownMenuItem>
-            )}
-            {onPauseToggle && (
+        {/* Inline controls: Solo button + Toggle switch */}
+        <div className="flex items-center gap-1.5">
+          {/* Solo mode button */}
+          {onSoloMode && (
+            <TooltipProvider>
+              <Tooltip>
+                <TooltipTrigger asChild>
+                  <Button
+                    variant="ghost"
+                    size="icon"
+                    className="h-6 w-6"
+                    onClick={onSoloMode}
+                    disabled={isSoloingAccount || account.paused}
+                    aria-label="Activate only this account"
+                  >
+                    {isSoloingAccount ? (
+                      <Loader2 className="h-3.5 w-3.5 animate-spin" />
+                    ) : (
+                      <Radio className="h-3.5 w-3.5" />
+                    )}
+                  </Button>
+                </TooltipTrigger>
+                <TooltipContent>Activate only this account</TooltipContent>
+              </Tooltip>
+            </TooltipProvider>
+          )}
+
+          {/* Pause/Resume toggle switch */}
+          {onPauseToggle && (
+            <TooltipProvider>
+              <Tooltip>
+                <TooltipTrigger asChild>
+                  <div>
+                    <Switch
+                      checked={!account.paused}
+                      onCheckedChange={(checked) => onPauseToggle(!checked)}
+                      disabled={isPausingAccount}
+                      aria-label={account.paused ? 'Resume account' : 'Pause account'}
+                      className="scale-90"
+                    />
+                  </div>
+                </TooltipTrigger>
+                <TooltipContent>
+                  {account.paused ? 'Resume account' : 'Pause account'}
+                </TooltipContent>
+              </Tooltip>
+            </TooltipProvider>
+          )}
+
+          {/* Dropdown menu for other actions */}
+          <DropdownMenu>
+            <DropdownMenuTrigger asChild>
+              <Button variant="ghost" size="icon" className="h-7 w-7">
+                <MoreHorizontal className="w-4 h-4" />
+              </Button>
+            </DropdownMenuTrigger>
+            <DropdownMenuContent align="end">
+              {!account.isDefault && (
+                <DropdownMenuItem onClick={onSetDefault}>
+                  <Star className="w-4 h-4 mr-2" />
+                  Set as default
+                </DropdownMenuItem>
+              )}
               <DropdownMenuItem
-                onClick={() => onPauseToggle(!account.paused)}
-                disabled={isPausingAccount}
+                className="text-destructive focus:text-destructive"
+                onClick={onRemove}
+                disabled={isRemoving}
               >
-                {account.paused ? (
-                  <>
-                    <Play className="w-4 h-4 mr-2" />
-                    {isPausingAccount ? 'Resuming...' : 'Resume account'}
-                  </>
-                ) : (
-                  <>
-                    <Pause className="w-4 h-4 mr-2" />
-                    {isPausingAccount ? 'Pausing...' : 'Pause account'}
-                  </>
-                )}
+                <Trash2 className="w-4 h-4 mr-2" />
+                {isRemoving ? 'Removing...' : 'Remove account'}
               </DropdownMenuItem>
-            )}
-            <DropdownMenuItem
-              className="text-destructive focus:text-destructive"
-              onClick={onRemove}
-              disabled={isRemoving}
-            >
-              <Trash2 className="w-4 h-4 mr-2" />
-              {isRemoving ? 'Removing...' : 'Remove account'}
-            </DropdownMenuItem>
-          </DropdownMenuContent>
-        </DropdownMenu>
+            </DropdownMenuContent>
+          </DropdownMenu>
+        </div>
       </div>
 
       {/* Quota bar - supports all providers with quota API */}
diff --git a/ui/src/components/cliproxy/provider-editor/accounts-section.tsx b/ui/src/components/cliproxy/provider-editor/accounts-section.tsx
index f9d43ed8..d69f9b58 100644
--- a/ui/src/components/cliproxy/provider-editor/accounts-section.tsx
+++ b/ui/src/components/cliproxy/provider-editor/accounts-section.tsx
@@ -1,13 +1,16 @@
 /**
  * Accounts Section Component
- * Manages connected OAuth accounts for a provider
+ * Manages connected OAuth accounts for a provider with multi-select bulk actions
  */
 
+import { useState, useMemo, useCallback } from 'react';
 import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { Switch } from '@/components/ui/switch';
+import { Checkbox } from '@/components/ui/checkbox';
 import { User, Plus, Globe } from 'lucide-react';
 import { AccountItem } from './account-item';
+import { BulkActionBar } from './bulk-action-bar';
 import type { OAuthAccount } from '@/lib/api-client';
 
 interface AccountsSectionProps {
@@ -16,9 +19,21 @@ interface AccountsSectionProps {
   onSetDefault: (accountId: string) => void;
   onRemoveAccount: (accountId: string) => void;
   onPauseToggle?: (accountId: string, paused: boolean) => void;
+  /** Solo mode: activate one account, pause all others */
+  onSoloMode?: (accountId: string) => void;
+  /** Bulk pause multiple accounts */
+  onBulkPause?: (accountIds: string[]) => void;
+  /** Bulk resume multiple accounts */
+  onBulkResume?: (accountIds: string[]) => void;
   isRemovingAccount?: boolean;
   /** Pause/resume mutation in progress */
   isPausingAccount?: boolean;
+  /** Solo mode mutation in progress */
+  isSoloingAccount?: boolean;
+  /** Bulk pause mutation in progress */
+  isBulkPausing?: boolean;
+  /** Bulk resume mutation in progress */
+  isBulkResuming?: boolean;
   privacyMode?: boolean;
   /** Show quota bars for accounts (only applicable for 'agy' provider) */
   showQuota?: boolean;
@@ -35,8 +50,14 @@ export function AccountsSection({
   onSetDefault,
   onRemoveAccount,
   onPauseToggle,
+  onSoloMode,
+  onBulkPause,
+  onBulkResume,
   isRemovingAccount,
   isPausingAccount,
+  isSoloingAccount,
+  isBulkPausing,
+  isBulkResuming,
   privacyMode,
   showQuota,
   isKiro,
@@ -44,10 +65,80 @@ export function AccountsSection({
   onKiroNoIncognitoChange,
   kiroSettingsLoading,
 }: AccountsSectionProps) {
+  // Multi-select state - raw selection (may contain stale IDs)
+  const [rawSelectedIds, setRawSelectedIds] = useState<Set<string>>(new Set());
+
+  // Derive valid selections by filtering out stale IDs
+  const accountIds = useMemo(() => new Set(accounts.map((a) => a.id)), [accounts]);
+  const selectedIds = useMemo(
+    () => new Set([...rawSelectedIds].filter((id) => accountIds.has(id))),
+    [rawSelectedIds, accountIds]
+  );
+
+  // Enable multi-select when bulk actions are available
+  const isSelectable = !!(onBulkPause && onBulkResume);
+
+  // Computed selection state
+  const selectedCount = selectedIds.size;
+  const allSelected = accounts.length > 0 && selectedIds.size === accounts.length;
+  const someSelected = selectedIds.size > 0 && selectedIds.size < accounts.length;
+
+  // Selection handlers
+  const toggleSelect = useCallback((id: string) => {
+    setRawSelectedIds((prev) => {
+      const next = new Set(prev);
+      if (next.has(id)) next.delete(id);
+      else next.add(id);
+      return next;
+    });
+  }, []);
+
+  const selectAll = useCallback(() => {
+    setRawSelectedIds(new Set(accounts.map((a) => a.id)));
+  }, [accounts]);
+
+  const deselectAll = useCallback(() => {
+    setRawSelectedIds(new Set());
+  }, []);
+
+  const toggleSelectAll = useCallback(() => {
+    if (allSelected) {
+      deselectAll();
+    } else {
+      selectAll();
+    }
+  }, [allSelected, selectAll, deselectAll]);
+
+  // Bulk action handlers
+  const handleBulkPause = useCallback(() => {
+    if (onBulkPause && selectedIds.size > 0) {
+      onBulkPause(Array.from(selectedIds));
+      // Clear selection after action (will be invalidated by mutation success)
+      setRawSelectedIds(new Set());
+    }
+  }, [onBulkPause, selectedIds]);
+
+  const handleBulkResume = useCallback(() => {
+    if (onBulkResume && selectedIds.size > 0) {
+      onBulkResume(Array.from(selectedIds));
+      setRawSelectedIds(new Set());
+    }
+  }, [onBulkResume, selectedIds]);
+
   return (
     <div>
       <div className="flex items-center justify-between mb-3">
         <h3 className="text-sm font-medium flex items-center gap-2">
+          {/* Select All checkbox */}
+          {isSelectable && accounts.length > 0 && (
+            <Checkbox
+              checked={allSelected}
+              onCheckedChange={toggleSelectAll}
+              aria-label="Select all accounts"
+              className={someSelected ? 'data-[state=checked]:bg-primary/50' : ''}
+              {...(someSelected ? { 'data-state': 'indeterminate' } : {})}
+            />
+          )}
           <User className="w-4 h-4" />
           Accounts
           {accounts.length > 0 && (
@@ -73,10 +164,15 @@ export function AccountsSection({
               onPauseToggle={
                 onPauseToggle ? (paused) => onPauseToggle(account.id, paused) : undefined
               }
+              onSoloMode={onSoloMode ? () => onSoloMode(account.id) : undefined}
               isRemoving={isRemovingAccount}
               isPausingAccount={isPausingAccount}
+              isSoloingAccount={isSoloingAccount}
               privacyMode={privacyMode}
               showQuota={showQuota}
+              selectable={isSelectable}
+              selected={selectedIds.has(account.id)}
+              onSelectChange={() => toggleSelect(account.id)}
             />
           ))}
         </div>
@@ -88,6 +184,18 @@ export function AccountsSection({
         </div>
       )}
 
+      {/* Bulk Action Bar - shows when accounts selected */}
+      {isSelectable && (
+        <BulkActionBar
+          selectedCount={selectedCount}
+          onPauseSelected={handleBulkPause}
+          onResumeSelected={handleBulkResume}
+          onClearSelection={deselectAll}
+          isPausing={!!isBulkPausing}
+          isResuming={!!isBulkResuming}
+        />
+      )}
+
       {/* Kiro-specific: Incognito browser setting - users complain "it keeps opening incognito" */}
       {isKiro && onKiroNoIncognitoChange && (
         <div className="mt-3 pt-3 border-t border-dashed">
diff --git a/ui/src/components/cliproxy/provider-editor/bulk-action-bar.tsx b/ui/src/components/cliproxy/provider-editor/bulk-action-bar.tsx
new file mode 100644
index 00000000..426c8c8f
--- /dev/null
+++ b/ui/src/components/cliproxy/provider-editor/bulk-action-bar.tsx
@@ -0,0 +1,67 @@
+/**
+ * Bulk Action Bar Component
+ * Appears when accounts are selected for bulk pause/resume operations
+ */
+
+import { Button } from '@/components/ui/button';
+import { Pause, Play, Loader2 } from 'lucide-react';
+
+interface BulkActionBarProps {
+  selectedCount: number;
+  onPauseSelected: () => void;
+  onResumeSelected: () => void;
+  onClearSelection: () => void;
+  isPausing: boolean;
+  isResuming: boolean;
+}
+
+export function BulkActionBar({
+  selectedCount,
+  onPauseSelected,
+  onResumeSelected,
+  onClearSelection,
+  isPausing,
+  isResuming,
+}: BulkActionBarProps) {
+  // Show bar when at least 1 account is selected (per validation decision)
+  if (selectedCount < 1) return null;
+
+  const isLoading = isPausing || isResuming;
+
+  return (
+    <div className="flex items-center gap-3 p-2 bg-muted/50 rounded-lg border mt-2">
+      <span className="text-sm text-muted-foreground">{selectedCount} selected</span>
+      <Button
+        variant="ghost"
+        size="sm"
+        className="text-xs h-6 px-2"
+        onClick={onClearSelection}
+        disabled={isLoading}
+      >
+        Clear
+      </Button>
+      <div className="flex gap-2 ml-auto">
+        <Button
+          size="sm"
+          variant="outline"
+          className="h-7 text-xs gap-1"
+          onClick={onPauseSelected}
+          disabled={isLoading}
+        >
+          {isPausing ? <Loader2 className="w-3 h-3 animate-spin" /> : <Pause className="w-3 h-3" />}
+          Pause Selected
+        </Button>
+        <Button
+          size="sm"
+          variant="outline"
+          className="h-7 text-xs gap-1"
+          onClick={onResumeSelected}
+          disabled={isLoading}
+        >
+          {isResuming ? <Loader2 className="w-3 h-3 animate-spin" /> : <Play className="w-3 h-3" />}
+          Resume Selected
+        </Button>
+      </div>
+    </div>
+  );
+}
diff --git a/ui/src/components/cliproxy/provider-editor/index.tsx b/ui/src/components/cliproxy/provider-editor/index.tsx
index b2d5b089..77672594 100644
--- a/ui/src/components/cliproxy/provider-editor/index.tsx
+++ b/ui/src/components/cliproxy/provider-editor/index.tsx
@@ -39,8 +39,14 @@ export function ProviderEditor({
   onSetDefault,
   onRemoveAccount,
   onPauseToggle,
+  onSoloMode,
+  onBulkPause,
+  onBulkResume,
   isRemovingAccount,
   isPausingAccount,
+  isSoloingAccount,
+  isBulkPausing,
+  isBulkResuming,
 }: ProviderEditorProps) {
   const [customPresetOpen, setCustomPresetOpen] = useState(false);
   const { privacyMode } = usePrivacy();
@@ -203,8 +209,14 @@ export function ProviderEditor({
                     onSetDefault={onSetDefault}
                     onRemoveAccount={onRemoveAccount}
                     onPauseToggle={onPauseToggle}
+                    onSoloMode={onSoloMode}
+                    onBulkPause={onBulkPause}
+                    onBulkResume={onBulkResume}
                     isRemovingAccount={isRemovingAccount}
                     isPausingAccount={isPausingAccount}
+                    isSoloingAccount={isSoloingAccount}
+                    isBulkPausing={isBulkPausing}
+                    isBulkResuming={isBulkResuming}
                     privacyMode={privacyMode}
                     isRemoteMode={isRemoteMode}
                   />
diff --git a/ui/src/components/cliproxy/provider-editor/model-config-tab.tsx b/ui/src/components/cliproxy/provider-editor/model-config-tab.tsx
index 51e46d55..62eeadd8 100644
--- a/ui/src/components/cliproxy/provider-editor/model-config-tab.tsx
+++ b/ui/src/components/cliproxy/provider-editor/model-config-tab.tsx
@@ -37,9 +37,21 @@ interface ModelConfigTabProps {
   onSetDefault: (accountId: string) => void;
   onRemoveAccount: (accountId: string) => void;
   onPauseToggle?: (accountId: string, paused: boolean) => void;
+  /** Solo mode: activate one account, pause all others */
+  onSoloMode?: (accountId: string) => void;
   isRemovingAccount?: boolean;
   /** Pause/resume mutation in progress */
   isPausingAccount?: boolean;
+  /** Solo mode mutation in progress */
+  isSoloingAccount?: boolean;
+  /** Bulk pause multiple accounts */
+  onBulkPause?: (accountIds: string[]) => void;
+  /** Bulk resume multiple accounts */
+  onBulkResume?: (accountIds: string[]) => void;
+  /** Bulk pause mutation in progress */
+  isBulkPausing?: boolean;
+  /** Bulk resume mutation in progress */
+  isBulkResuming?: boolean;
   privacyMode?: boolean;
   /** True if connected to remote CLIProxy (quota not available) */
   isRemoteMode?: boolean;
@@ -64,8 +76,14 @@ export function ModelConfigTab({
   onSetDefault,
   onRemoveAccount,
   onPauseToggle,
+  onSoloMode,
+  onBulkPause,
+  onBulkResume,
   isRemovingAccount,
   isPausingAccount,
+  isSoloingAccount,
+  isBulkPausing,
+  isBulkResuming,
   privacyMode,
   isRemoteMode,
 }: ModelConfigTabProps) {
@@ -140,8 +158,14 @@ export function ModelConfigTab({
           onSetDefault={onSetDefault}
           onRemoveAccount={onRemoveAccount}
           onPauseToggle={onPauseToggle}
+          onSoloMode={onSoloMode}
+          onBulkPause={onBulkPause}
+          onBulkResume={onBulkResume}
           isRemovingAccount={isRemovingAccount}
           isPausingAccount={isPausingAccount}
+          isSoloingAccount={isSoloingAccount}
+          isBulkPausing={isBulkPausing}
+          isBulkResuming={isBulkResuming}
           privacyMode={privacyMode}
           showQuota={provider === 'agy' && !isRemoteMode}
           isKiro={isKiro}
diff --git a/ui/src/components/cliproxy/provider-editor/types.ts b/ui/src/components/cliproxy/provider-editor/types.ts
index 743a1bf3..a9023729 100644
--- a/ui/src/components/cliproxy/provider-editor/types.ts
+++ b/ui/src/components/cliproxy/provider-editor/types.ts
@@ -31,9 +31,21 @@ export interface ProviderEditorProps {
   onSetDefault: (accountId: string) => void;
   onRemoveAccount: (accountId: string) => void;
   onPauseToggle?: (accountId: string, paused: boolean) => void;
+  /** Solo mode: activate one account, pause all others */
+  onSoloMode?: (accountId: string) => void;
+  /** Bulk pause multiple accounts */
+  onBulkPause?: (accountIds: string[]) => void;
+  /** Bulk resume multiple accounts */
+  onBulkResume?: (accountIds: string[]) => void;
   isRemovingAccount?: boolean;
   /** Pause/resume mutation in progress */
   isPausingAccount?: boolean;
+  /** Solo mode mutation in progress */
+  isSoloingAccount?: boolean;
+  /** Bulk pause mutation in progress */
+  isBulkPausing?: boolean;
+  /** Bulk resume mutation in progress */
+  isBulkResuming?: boolean;
 }
 
 export interface AccountItemProps {
@@ -41,12 +53,22 @@ export interface AccountItemProps {
   onSetDefault: () => void;
   onRemove: () => void;
   onPauseToggle?: (paused: boolean) => void;
+  /** Solo mode: activate this account, pause all others */
+  onSoloMode?: () => void;
   isRemoving?: boolean;
   /** Pause/resume mutation in progress */
   isPausingAccount?: boolean;
+  /** Solo mode mutation in progress */
+  isSoloingAccount?: boolean;
   privacyMode?: boolean;
   /** Show quota bar (only for 'agy' provider) */
   showQuota?: boolean;
+  /** Enable checkbox for multi-select */
+  selectable?: boolean;
+  /** Whether this account is currently selected */
+  selected?: boolean;
+  /** Called when checkbox is toggled */
+  onSelectChange?: (selected: boolean) => void;
 }
 
 export interface ModelMappingValues {