diff --git a/src/main/services/extensions/runtime/ExtensionsRuntimeAdapter.ts b/src/main/services/extensions/runtime/ExtensionsRuntimeAdapter.ts
index 9fb3e4ce..716236db 100644
--- a/src/main/services/extensions/runtime/ExtensionsRuntimeAdapter.ts
+++ b/src/main/services/extensions/runtime/ExtensionsRuntimeAdapter.ts
@@ -21,7 +21,6 @@ async function buildManagementCliEnvForBinary(binaryPath: string): Promise<NodeJ
   });
   return env;
 }
-
 export interface ExtensionsRuntimeAdapter {
   readonly flavor: CliFlavor;
   buildManagementCliEnv(binaryPath: string): Promise<NodeJS.ProcessEnv>;
diff --git a/src/main/services/extensions/runtime/mcpDiagnosticsParser.ts b/src/main/services/extensions/runtime/mcpDiagnosticsParser.ts
index e35d6b7f..e43c87bf 100644
--- a/src/main/services/extensions/runtime/mcpDiagnosticsParser.ts
+++ b/src/main/services/extensions/runtime/mcpDiagnosticsParser.ts
@@ -48,7 +48,6 @@ function isSensitiveCliFlag(flag: string): boolean {
   const normalizedFlag = flag.toLowerCase().replace(/^--/, '').replace(/[-_]/g, '');
   return SENSITIVE_FLAG_NAMES.has(normalizedFlag);
 }
-
 function extractJsonObject<T>(raw: string): T {
   const trimmed = raw.trim();
   try {
diff --git a/src/renderer/components/extensions/mcp/McpServerCard.tsx b/src/renderer/components/extensions/mcp/McpServerCard.tsx
index 10844f74..90a34c4c 100644
--- a/src/renderer/components/extensions/mcp/McpServerCard.tsx
+++ b/src/renderer/components/extensions/mcp/McpServerCard.tsx
@@ -11,12 +11,12 @@ import { Button } from '@renderer/components/ui/button';
 import { Tooltip, TooltipContent, TooltipTrigger } from '@renderer/components/ui/tooltip';
 import { useStore } from '@renderer/store';
 import { formatCompactNumber, formatRelativeTime } from '@renderer/utils/formatters';
+import { getDefaultMcpSharedScope } from '@shared/utils/mcpScopes';
 import {
   getMcpInstallationSummaryLabel,
   getMcpOperationKey,
   sanitizeMcpServerName,
 } from '@shared/utils/extensionNormalizers';
-import { getDefaultMcpSharedScope } from '@shared/utils/mcpScopes';
 import { Clock, Cloud, Globe, KeyRound, Lock, Monitor, Star, Tag, Wrench } from 'lucide-react';
 import { Github as GithubIcon } from 'lucide-react';
 
diff --git a/src/renderer/components/extensions/mcp/McpServerDetailDialog.tsx b/src/renderer/components/extensions/mcp/McpServerDetailDialog.tsx
index 97845c01..c96d428d 100644
--- a/src/renderer/components/extensions/mcp/McpServerDetailDialog.tsx
+++ b/src/renderer/components/extensions/mcp/McpServerDetailDialog.tsx
@@ -25,18 +25,18 @@ import {
   SelectValue,
 } from '@renderer/components/ui/select';
 import { useStore } from '@renderer/store';
-import {
-  getMcpInstallationSummaryLabel,
-  getMcpOperationKey,
-  getPreferredMcpInstallationEntry,
-  sanitizeMcpServerName,
-} from '@shared/utils/extensionNormalizers';
 import {
   getDefaultMcpSharedScope,
   getMcpScopeLabel,
   isProjectScopedMcpScope,
   isSharedMcpScope,
 } from '@shared/utils/mcpScopes';
+import {
+  getMcpInstallationSummaryLabel,
+  getMcpOperationKey,
+  getPreferredMcpInstallationEntry,
+  sanitizeMcpServerName,
+} from '@shared/utils/extensionNormalizers';
 import { ExternalLink, Lock, Plus, Star, Trash2, Wrench } from 'lucide-react';
 
 import { InstallButton } from '../common/InstallButton';
diff --git a/src/renderer/components/extensions/plugins/PluginsPanel.tsx b/src/renderer/components/extensions/plugins/PluginsPanel.tsx
index 8adde28f..1f846423 100644
--- a/src/renderer/components/extensions/plugins/PluginsPanel.tsx
+++ b/src/renderer/components/extensions/plugins/PluginsPanel.tsx
@@ -16,8 +16,8 @@ import {
   SelectValue,
 } from '@renderer/components/ui/select';
 import { useStore } from '@renderer/store';
-import { inferCapabilities, normalizeCategory } from '@shared/utils/extensionNormalizers';
 import { getCliProviderExtensionCapability } from '@shared/utils/providerExtensionCapabilities';
+import { inferCapabilities, normalizeCategory } from '@shared/utils/extensionNormalizers';
 import { ArrowUpDown, Filter, Puzzle, Search } from 'lucide-react';
 import { useShallow } from 'zustand/react/shallow';
 
diff --git a/src/renderer/components/extensions/skills/SkillDetailDialog.tsx b/src/renderer/components/extensions/skills/SkillDetailDialog.tsx
index 458bcce7..40df90fd 100644
--- a/src/renderer/components/extensions/skills/SkillDetailDialog.tsx
+++ b/src/renderer/components/extensions/skills/SkillDetailDialog.tsx
@@ -29,7 +29,7 @@ import { useShallow } from 'zustand/react/shallow';
 
 import { resolveSkillProjectPath } from './skillProjectUtils';
 
-import type { SkillValidationIssue } from '@shared/types';
+import type { SkillValidationIssue } from '@shared/types/extensions';
 
 interface SkillDetailDialogProps {
   skillId: string | null;
diff --git a/src/renderer/components/extensions/skills/SkillEditorDialog.tsx b/src/renderer/components/extensions/skills/SkillEditorDialog.tsx
index 65885733..8af5f748 100644
--- a/src/renderer/components/extensions/skills/SkillEditorDialog.tsx
+++ b/src/renderer/components/extensions/skills/SkillEditorDialog.tsx
@@ -41,8 +41,8 @@ import { validateSkillFolderName } from './skillValidationUtils';
 import type {
   SkillDetail,
   SkillInvocationMode,
-  SkillReviewPreview,
   SkillRootKind,
+  SkillReviewPreview,
 } from '@shared/types/extensions';
 
 type EditorMode = 'create' | 'edit';
diff --git a/src/renderer/components/extensions/skills/SkillsPanel.tsx b/src/renderer/components/extensions/skills/SkillsPanel.tsx
index 9c95959d..c04b1495 100644
--- a/src/renderer/components/extensions/skills/SkillsPanel.tsx
+++ b/src/renderer/components/extensions/skills/SkillsPanel.tsx
@@ -127,7 +127,7 @@ function formatRuntimeAudienceLabel(providerNames: readonly string[]): string {
     return 'the configured runtime';
   }
   if (providerNames.length === 1) {
-    return providerNames[0];
+    return providerNames[0]!;
   }
   if (providerNames.length === 2) {
     return `${providerNames[0]} and ${providerNames[1]}`;
diff --git a/test/main/services/extensions/McpInstallationStateService.test.ts b/test/main/services/extensions/McpInstallationStateService.test.ts
index bafc6c34..69244398 100644
--- a/test/main/services/extensions/McpInstallationStateService.test.ts
+++ b/test/main/services/extensions/McpInstallationStateService.test.ts
@@ -21,14 +21,15 @@ vi.mock('@main/utils/pathDecoder', () => ({
     const windowsRoot = cwd.match(/^[A-Za-z]:[\\/]/)?.[0] ?? null;
     const root = windowsRoot ?? '/';
     const sep = windowsRoot ? '\\' : '/';
-    return `${root}tmp${sep}mock-home`.replaceAll('//', '/');
+    return `${root}${root.endsWith(sep) ? '' : sep}tmp${sep}mock-home`;
   },
   getClaudeBasePath: () => {
     const cwd = process.cwd();
     const windowsRoot = cwd.match(/^[A-Za-z]:[\\/]/)?.[0] ?? null;
     const root = windowsRoot ?? '/';
     const sep = windowsRoot ? '\\' : '/';
-    return `${root}tmp${sep}mock-home${sep}.claude`.replaceAll('//', '/');
+    const mockHome = `${root}${root.endsWith(sep) ? '' : sep}tmp${sep}mock-home`;
+    return `${mockHome}${sep}.claude`;
   },
   setClaudeBasePathOverride: vi.fn(),
 }));
diff --git a/test/renderer/utils/multimodelProviderVisibility.test.ts b/test/renderer/utils/multimodelProviderVisibility.test.ts
index 4ee98ca3..6202bc94 100644
--- a/test/renderer/utils/multimodelProviderVisibility.test.ts
+++ b/test/renderer/utils/multimodelProviderVisibility.test.ts
@@ -5,7 +5,6 @@ import {
   getVisibleMultimodelProviders,
   isMultimodelRuntimeStatus,
 } from '@renderer/utils/multimodelProviderVisibility';
-
 import type { CliInstallationStatus, CliProviderStatus } from '@shared/types';
 import { createDefaultCliExtensionCapabilities } from '@shared/utils/providerExtensionCapabilities';