diff --git a/.agents/skills/karpathy-guidelines/SKILL.md b/.agents/skills/karpathy-guidelines/SKILL.md
new file mode 100644
index 0000000000..2b7330f5b8
--- /dev/null
+++ b/.agents/skills/karpathy-guidelines/SKILL.md
@@ -0,0 +1,33 @@
+---
+name: karpathy-guidelines
+description: Lightweight coding guardrails for making focused, simple, and verifiable changes in this repo. Use for all coding work.
+---
+
+# Karpathy Guidelines
+
+Use this skill whenever you touch code in this repository.
+
+## Principles
+
+- Keep the change small and directly tied to the user request.
+- Prefer the simplest implementation that fits the existing codebase.
+- Read the nearby code first, then match its patterns.
+- Avoid unrelated refactors, broad rewrites, or style churn.
+- Preserve existing behavior unless the user explicitly asked to change it.
+- Treat regressions as a signal to narrow the change, not to add workaround layers.
+
+## Workflow
+
+1. Inspect the current implementation and tests around the change.
+2. Make the smallest coherent edit.
+3. Add or update focused tests when the behavior changes or the risk is non-trivial.
+4. Run the narrowest relevant verification first.
+5. Report exactly what was verified and anything left unverified.
+
+## Review Checklist
+
+- Does this change solve the stated problem without expanding scope?
+- Did it preserve existing route/component/data-flow semantics?
+- Are new abstractions justified by real complexity?
+- Are tests focused on the behavior that could regress?
+- Are unrelated files and generated artifacts left alone?
diff --git a/web/app/components/main-nav/__tests__/index.spec.tsx b/web/app/components/main-nav/__tests__/index.spec.tsx
index 58c4d11603..cca8b221f0 100644
--- a/web/app/components/main-nav/__tests__/index.spec.tsx
+++ b/web/app/components/main-nav/__tests__/index.spec.tsx
@@ -74,6 +74,14 @@ vi.mock('@/context/i18n', () => ({
   useDocLink: () => (path: string) => `https://docs.dify.ai${path}`,
 }))
 
+vi.mock('@/config', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('@/config')>()
+  return {
+    ...actual,
+    IS_CLOUD_EDITION: true,
+  }
+})
+
 const mockPush = vi.fn()
 const mockSetShowPricingModal = vi.fn()
 const mockSetShowAccountSettingModal = vi.fn()
@@ -198,7 +206,7 @@ describe('MainNav', () => {
     expect(screen.getByRole('link', { name: /common.mainNav.home/ })).toHaveAttribute('href', '/explore/apps')
     expect(screen.getByRole('link', { name: /common.menus.apps/ })).toHaveAttribute('href', '/apps')
     expect(screen.getByRole('link', { name: /common.menus.datasets/ })).toHaveAttribute('href', '/datasets')
-    expect(screen.getByRole('link', { name: /common.mainNav.integrations/ })).toHaveAttribute('href', '/tools')
+    expect(screen.getByRole('link', { name: /common.mainNav.integrations/ })).toHaveAttribute('href', '/tools?section=provider')
     expect(screen.getByRole('link', { name: /common.mainNav.marketplace/ })).toHaveAttribute('href', '/plugins')
   })
 
diff --git a/web/app/components/main-nav/components/__tests__/workspace-card.spec.tsx b/web/app/components/main-nav/components/__tests__/workspace-card.spec.tsx
new file mode 100644
index 0000000000..a380aaea1d
--- /dev/null
+++ b/web/app/components/main-nav/components/__tests__/workspace-card.spec.tsx
@@ -0,0 +1,110 @@
+import type { AppContextValue } from '@/context/app-context'
+import type { ModalContextState } from '@/context/modal-context'
+import type { ProviderContextState } from '@/context/provider-context'
+import { screen } from '@testing-library/react'
+import { renderWithSystemFeatures } from '@/__tests__/utils/mock-system-features'
+import { Plan } from '@/app/components/billing/type'
+import { useAppContext } from '@/context/app-context'
+import { useModalContext } from '@/context/modal-context'
+import { useProviderContext } from '@/context/provider-context'
+import { useWorkspacesContext } from '@/context/workspace-context'
+import WorkspaceCard from '../workspace-card'
+
+vi.mock('@/config', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('@/config')>()
+  return {
+    ...actual,
+    IS_CLOUD_EDITION: false,
+  }
+})
+
+vi.mock('@/context/app-context', () => ({
+  useAppContext: vi.fn(),
+}))
+
+vi.mock('@/context/provider-context', () => ({
+  useProviderContext: vi.fn(),
+}))
+
+vi.mock('@/context/modal-context', () => ({
+  useModalContext: vi.fn(),
+}))
+
+vi.mock('@/context/workspace-context', () => ({
+  useWorkspacesContext: vi.fn(),
+}))
+
+vi.mock('@/service/common', () => ({
+  switchWorkspace: vi.fn(),
+}))
+
+const appContextValue: AppContextValue = {
+  userProfile: {
+    id: 'user-1',
+    name: 'Evan Z',
+    email: 'evan@example.com',
+    avatar: '',
+    avatar_url: '',
+    is_password_set: true,
+  },
+  mutateUserProfile: vi.fn(),
+  currentWorkspace: {
+    id: 'workspace-1',
+    name: 'Solar Studio',
+    plan: Plan.sandbox,
+    status: 'normal',
+    created_at: 0,
+    role: 'owner',
+    providers: [],
+    trial_credits: 10000,
+    trial_credits_used: 2500,
+    next_credit_reset_date: 0,
+  },
+  isCurrentWorkspaceManager: true,
+  isCurrentWorkspaceOwner: true,
+  isCurrentWorkspaceEditor: true,
+  isCurrentWorkspaceDatasetOperator: false,
+  mutateCurrentWorkspace: vi.fn(),
+  langGeniusVersionInfo: {
+    current_env: 'testing',
+    current_version: '1.0.0',
+    latest_version: '1.0.0',
+    release_date: '',
+    release_notes: '',
+    version: '1.0.0',
+    can_auto_update: false,
+  },
+  useSelector: vi.fn(),
+  isLoadingCurrentWorkspace: false,
+  isValidatingCurrentWorkspace: false,
+}
+
+describe('WorkspaceCard', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.mocked(useAppContext).mockReturnValue(appContextValue)
+    vi.mocked(useProviderContext).mockReturnValue({
+      enableBilling: true,
+      isEducationAccount: false,
+      isFetchedPlan: true,
+      plan: { type: Plan.sandbox },
+    } as ProviderContextState)
+    vi.mocked(useModalContext).mockReturnValue({
+      setShowPricingModal: vi.fn(),
+      setShowAccountSettingModal: vi.fn(),
+    } as unknown as ModalContextState)
+    vi.mocked(useWorkspacesContext).mockReturnValue({
+      workspaces: [
+        { id: 'workspace-1', name: 'Solar Studio', plan: Plan.sandbox, status: 'normal', created_at: 0, current: true },
+      ],
+    })
+  })
+
+  it('hides cloud-only credits and upgrade actions outside cloud edition', () => {
+    renderWithSystemFeatures(<WorkspaceCard />)
+
+    expect(screen.getByRole('button', { name: 'common.mainNav.workspace.openMenu' })).toBeInTheDocument()
+    expect(screen.queryByRole('button', { name: /common\.mainNav\.workspace\.credits/ })).not.toBeInTheDocument()
+    expect(screen.queryByText('billing.upgradeBtn.encourageShort')).not.toBeInTheDocument()
+  })
+})
diff --git a/web/app/components/main-nav/components/workspace-card.tsx b/web/app/components/main-nav/components/workspace-card.tsx
index 98616cb63d..ab1be5d498 100644
--- a/web/app/components/main-nav/components/workspace-card.tsx
+++ b/web/app/components/main-nav/components/workspace-card.tsx
@@ -7,6 +7,7 @@ import { useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import { Plan } from '@/app/components/billing/type'
 import { ACCOUNT_SETTING_TAB } from '@/app/components/header/account-setting/constants'
+import { IS_CLOUD_EDITION } from '@/config'
 import { useAppContext } from '@/context/app-context'
 import { useModalContext } from '@/context/modal-context'
 import { useProviderContext } from '@/context/provider-context'
@@ -113,34 +114,36 @@ const WorkspaceCard = () => {
           </div>
           <span aria-hidden className="i-ri-expand-up-down-line h-4 w-4 shrink-0 text-text-tertiary" />
         </button>
-        <div className="flex items-center justify-center gap-1.5 border-t border-divider-subtle py-2 pr-2.5 pl-2">
-          <button
-            type="button"
-            className="flex min-w-0 flex-1 items-center gap-0.5 px-1 text-left text-text-tertiary transition-colors hover:text-text-secondary"
-            aria-label={t('mainNav.workspace.credits', { ns: 'common', count: formattedCredits })}
-            onClick={(e) => {
-              e.stopPropagation()
-              setShowAccountSettingModal({ payload: ACCOUNT_SETTING_TAB.PROVIDER })
-            }}
-          >
-            <span className="i-custom-vender-main-nav-credits h-3 w-3 shrink-0" aria-hidden />
-            <span className="truncate system-xs-medium" title={formattedCredits}>{formattedCredits}</span>
-            <span className="shrink-0 system-xs-regular">{t('mainNav.workspace.creditsUnit', { ns: 'common' })}</span>
-          </button>
-          {enableBilling && (
+        {IS_CLOUD_EDITION && (
+          <div className="flex items-center justify-center gap-1.5 border-t border-divider-subtle py-2 pr-2.5 pl-2">
             <button
               type="button"
-              className="max-w-[120px] shrink-0 truncate px-1 system-xs-semibold-uppercase text-saas-dify-blue-accessible transition-colors hover:text-saas-dify-blue-static-hover"
-              title={t('upgradeBtn.encourageShort', { ns: 'billing' })}
+              className="flex min-w-0 flex-1 items-center gap-0.5 px-1 text-left text-text-tertiary transition-colors hover:text-text-secondary"
+              aria-label={t('mainNav.workspace.credits', { ns: 'common', count: formattedCredits })}
               onClick={(e) => {
                 e.stopPropagation()
-                handlePlanClick()
+                setShowAccountSettingModal({ payload: ACCOUNT_SETTING_TAB.PROVIDER })
               }}
             >
-              {t('upgradeBtn.encourageShort', { ns: 'billing' })}
+              <span className="i-custom-vender-main-nav-credits h-3 w-3 shrink-0" aria-hidden />
+              <span className="truncate system-xs-medium" title={formattedCredits}>{formattedCredits}</span>
+              <span className="shrink-0 system-xs-regular">{t('mainNav.workspace.creditsUnit', { ns: 'common' })}</span>
             </button>
-          )}
-        </div>
+            {enableBilling && (
+              <button
+                type="button"
+                className="max-w-[120px] shrink-0 truncate px-1 system-xs-semibold-uppercase text-saas-dify-blue-accessible transition-colors hover:text-saas-dify-blue-static-hover"
+                title={t('upgradeBtn.encourageShort', { ns: 'billing' })}
+                onClick={(e) => {
+                  e.stopPropagation()
+                  handlePlanClick()
+                }}
+              >
+                {t('upgradeBtn.encourageShort', { ns: 'billing' })}
+              </button>
+            )}
+          </div>
+        )}
       </div>
       {open && (
         <div className="absolute top-0 right-0 left-0 z-20 flex flex-col overflow-hidden rounded-xl border border-components-panel-border bg-components-panel-bg-blur p-1 shadow-lg backdrop-blur-[5px]">
diff --git a/web/app/components/main-nav/index.tsx b/web/app/components/main-nav/index.tsx
index 9f9c3214d8..45092cd9fb 100644
--- a/web/app/components/main-nav/index.tsx
+++ b/web/app/components/main-nav/index.tsx
@@ -53,7 +53,7 @@ const MainNav = ({
       activeIcon: 'i-custom-vender-main-nav-knowledge-active',
     },
     {
-      href: '/tools',
+      href: '/tools?section=provider',
       label: t('mainNav.integrations', { ns: 'common' }),
       active: path => path.startsWith('/tools'),
       icon: 'i-custom-vender-main-nav-integrations',
diff --git a/web/app/components/tools/__tests__/integrations-page.spec.tsx b/web/app/components/tools/__tests__/integrations-page.spec.tsx
index cbf2761516..97bed53f85 100644
--- a/web/app/components/tools/__tests__/integrations-page.spec.tsx
+++ b/web/app/components/tools/__tests__/integrations-page.spec.tsx
@@ -45,6 +45,13 @@ describe('IntegrationsPage', () => {
     vi.clearAllMocks()
   })
 
+  it('defaults to the model provider section when no query is provided', () => {
+    renderIntegrationsPage()
+
+    expect(screen.getByTestId('model-provider-page')).toBeInTheDocument()
+    expect(screen.getAllByText('common.settings.provider')).toHaveLength(2)
+  })
+
   it('renders the model provider section from the section query', () => {
     renderIntegrationsPage({ section: 'provider' })
 
diff --git a/web/app/components/tools/integrations-page.tsx b/web/app/components/tools/integrations-page.tsx
index c6db598d55..975b58bdd3 100644
--- a/web/app/components/tools/integrations-page.tsx
+++ b/web/app/components/tools/integrations-page.tsx
@@ -129,7 +129,7 @@ export default function IntegrationsPage() {
   const { t } = useTranslation()
   const [sectionParam] = useQueryState('section', parseAsIntegrationSection)
   const [categoryParam] = useQueryState('category', parseAsToolCategory)
-  const section = sectionParam ?? sectionByToolCategory[categoryParam ?? 'builtin']
+  const section = sectionParam ?? (categoryParam ? sectionByToolCategory[categoryParam] : 'provider')
   const [providerSearchText, setProviderSearchText] = useState('')
   const [sidebarCollapsed, setSidebarCollapsed] = useState(false)
   const providerItem = useMemo<NavItem>(() => ({