From 470be2395fb8a24c8e66512dbcefe105b3311b82 Mon Sep 17 00:00:00 2001
From: Danny Avila <danny@librechat.ai>
Date: Wed, 10 Jun 2026 21:02:22 -0400
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20feat:=20Surface=20Model=20Spec=20Br?=
 =?UTF-8?q?anding=20on=20Landing=20and=20Selector=20(#13662)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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Adds an opt-in showOnLanding flag to model specs. When set, the chat
landing shows the spec's label and description in place of the
time-of-day greeting; specs without the flag are unaffected, so existing
deployments see no behavior change. HTML-valued descriptions (inline
icons + markup) render sanitized via the shared config-HTML sanitizer
with a new media tag/attribute allowlist, both on the landing and in
model selector items. Excludes e2e specs from the typed client lint
block so staged e2e files no longer fail pre-commit with 'file not
found in project'.
---
 client/src/components/Chat/Landing.tsx        | 47 +++++++++++++++----
 .../Endpoints/components/ModelSpecItem.tsx    |  5 +-
 .../Endpoints/components/SearchResults.tsx    |  5 +-
 .../Endpoints/components/SpecDescription.tsx  | 32 +++++++++++++
 .../__tests__/SpecDescription.spec.tsx        | 39 +++++++++++++++
 client/src/utils/__tests__/configHtml.test.ts | 16 +++++++
 client/src/utils/configHtml.ts                |  2 +
 e2e/config/librechat.e2e.yaml                 |  8 ++++
 e2e/specs/mock/model-spec-branding.spec.ts    | 47 +++++++++++++++++++
 eslint.config.mjs                             |  5 +-
 packages/data-provider/src/models.ts          |  3 ++
 11 files changed, 194 insertions(+), 15 deletions(-)
 create mode 100644 client/src/components/Chat/Menus/Endpoints/components/SpecDescription.tsx
 create mode 100644 client/src/components/Chat/Menus/Endpoints/components/__tests__/SpecDescription.spec.tsx
 create mode 100644 e2e/specs/mock/model-spec-branding.spec.ts

diff --git a/client/src/components/Chat/Landing.tsx b/client/src/components/Chat/Landing.tsx
index 7707fe7066..d3a3d3c8b1 100644
--- a/client/src/components/Chat/Landing.tsx
+++ b/client/src/components/Chat/Landing.tsx
@@ -2,11 +2,18 @@ import { useMemo, useCallback, useState, useEffect, useRef } from 'react';
 import { easings } from '@react-spring/web';
 import { EModelEndpoint } from 'librechat-data-provider';
 import { BirthdayIcon, TooltipAnchor, SplitText } from '@librechat/client';
+import {
+  getIconEndpoint,
+  getEntity,
+  getModelSpec,
+  createConfigHtmlSanitizer,
+  CONFIG_HTML_MEDIA_TAGS,
+  CONFIG_HTML_MEDIA_ATTR,
+} from '~/utils';
 import { useChatContext, useAgentsMapContext, useAssistantsMapContext } from '~/Providers';
 import { useGetEndpointsQuery, useGetStartupConfig } from '~/data-provider';
 import ConvoIcon from '~/components/Endpoints/ConvoIcon';
 import { useLocalize, useAuthContext } from '~/hooks';
-import { getIconEndpoint, getEntity } from '~/utils';
 
 const containerClassName =
   'shadow-stroke relative flex h-full items-center justify-center rounded-full bg-white dark:bg-presentation dark:text-white text-black dark:after:shadow-none ';
@@ -61,8 +68,26 @@ export default function Landing({ centerFormOnLanding }: { centerFormOnLanding:
     assistant_id: conversation?.assistant_id,
   });
 
-  const name = entity?.name ?? '';
-  const description = (entity?.description || conversation?.greeting) ?? '';
+  const modelSpec = useMemo(
+    () => getModelSpec({ specName: conversation?.spec, startupConfig }),
+    [conversation?.spec, startupConfig],
+  );
+
+  const brandedSpecLabel = modelSpec?.showOnLanding ? modelSpec.label : '';
+  const brandedSpecDescription = (modelSpec?.showOnLanding && modelSpec.description) || '';
+  const name = entity?.name ?? brandedSpecLabel;
+  const description =
+    (entity?.description || brandedSpecDescription || conversation?.greeting) ?? '';
+  const descriptionIsHTML = description.trim().startsWith('<');
+
+  const sanitizeDescription = useMemo(
+    () =>
+      createConfigHtmlSanitizer({
+        allowedTags: CONFIG_HTML_MEDIA_TAGS,
+        allowedAttr: CONFIG_HTML_MEDIA_ATTR,
+      }),
+    [],
+  );
 
   const getGreeting = useCallback(() => {
     if (typeof startupConfig?.interface?.customWelcome === 'string') {
@@ -198,11 +223,17 @@ export default function Landing({ centerFormOnLanding }: { centerFormOnLanding:
             />
           )}
         </div>
-        {description && (
-          <div className="animate-fadeIn mt-4 max-w-md text-center text-sm font-normal text-text-primary">
-            {description}
-          </div>
-        )}
+        {description &&
+          (descriptionIsHTML ? (
+            <div
+              className="animate-fadeIn mt-4 flex max-w-md items-center justify-center gap-2 text-center text-sm font-normal text-text-primary [&_img]:inline-block [&_img]:h-4 [&_img]:w-4"
+              dangerouslySetInnerHTML={{ __html: sanitizeDescription(description) }}
+            />
+          ) : (
+            <div className="animate-fadeIn mt-4 max-w-md text-center text-sm font-normal text-text-primary">
+              {description}
+            </div>
+          ))}
       </div>
     </div>
   );
diff --git a/client/src/components/Chat/Menus/Endpoints/components/ModelSpecItem.tsx b/client/src/components/Chat/Menus/Endpoints/components/ModelSpecItem.tsx
index a73d1d8e47..10662fa55b 100644
--- a/client/src/components/Chat/Menus/Endpoints/components/ModelSpecItem.tsx
+++ b/client/src/components/Chat/Menus/Endpoints/components/ModelSpecItem.tsx
@@ -5,6 +5,7 @@ import type { TModelSpec } from 'librechat-data-provider';
 import { useFavorites, useLocalize, useIsActiveItem } from '~/hooks';
 import { useModelSelectorContext } from '../ModelSelectorContext';
 import { CustomMenuItem as MenuItem } from '../CustomMenu';
+import SpecDescription from './SpecDescription';
 import SpecIcon from './SpecIcon';
 import { cn } from '~/utils';
 
@@ -48,9 +49,7 @@ export function ModelSpecItem({ spec, isSelected }: ModelSpecItemProps) {
         )}
         <div className="flex min-w-0 flex-col gap-1">
           <span className="truncate text-left">{spec.label}</span>
-          {spec.description && (
-            <span className="break-words text-xs font-normal">{spec.description}</span>
-          )}
+          <SpecDescription description={spec.description} />
         </div>
       </div>
       <button
diff --git a/client/src/components/Chat/Menus/Endpoints/components/SearchResults.tsx b/client/src/components/Chat/Menus/Endpoints/components/SearchResults.tsx
index 990ee8542c..a64907ff26 100644
--- a/client/src/components/Chat/Menus/Endpoints/components/SearchResults.tsx
+++ b/client/src/components/Chat/Menus/Endpoints/components/SearchResults.tsx
@@ -8,6 +8,7 @@ import MarketplaceItem, { marketplaceSearchMatches } from './Marketplace';
 import { useModelSelectorContext } from '../ModelSelectorContext';
 import { CustomMenuItem as MenuItem } from '../CustomMenu';
 import { shouldRenderEndpointOption } from '../utils';
+import SpecDescription from './SpecDescription';
 import SpecIcon from './SpecIcon';
 import { cn } from '~/utils';
 
@@ -82,9 +83,7 @@ export function SearchResults({ results, localize, searchValue }: SearchResultsP
                 )}
                 <div className="flex min-w-0 flex-col gap-1">
                   <span className="truncate text-left">{spec.label}</span>
-                  {spec.description && (
-                    <span className="break-words text-xs font-normal">{spec.description}</span>
-                  )}
+                  <SpecDescription description={spec.description} />
                 </div>
               </div>
               {selectedSpec === spec.name && (
diff --git a/client/src/components/Chat/Menus/Endpoints/components/SpecDescription.tsx b/client/src/components/Chat/Menus/Endpoints/components/SpecDescription.tsx
new file mode 100644
index 0000000000..b67395380a
--- /dev/null
+++ b/client/src/components/Chat/Menus/Endpoints/components/SpecDescription.tsx
@@ -0,0 +1,32 @@
+import { useMemo } from 'react';
+import { createConfigHtmlSanitizer, CONFIG_HTML_MEDIA_TAGS, CONFIG_HTML_MEDIA_ATTR } from '~/utils';
+
+interface SpecDescriptionProps {
+  description?: string;
+}
+
+export default function SpecDescription({ description }: SpecDescriptionProps) {
+  const sanitize = useMemo(
+    () =>
+      createConfigHtmlSanitizer({
+        allowedTags: CONFIG_HTML_MEDIA_TAGS,
+        allowedAttr: CONFIG_HTML_MEDIA_ATTR,
+      }),
+    [],
+  );
+
+  if (!description) {
+    return null;
+  }
+
+  if (!description.trim().startsWith('<')) {
+    return <span className="break-words text-xs font-normal">{description}</span>;
+  }
+
+  return (
+    <span
+      className="inline-flex items-center gap-1 break-words text-xs font-normal [&_img]:inline-block [&_img]:h-3.5 [&_img]:w-3.5"
+      dangerouslySetInnerHTML={{ __html: sanitize(description) }}
+    />
+  );
+}
diff --git a/client/src/components/Chat/Menus/Endpoints/components/__tests__/SpecDescription.spec.tsx b/client/src/components/Chat/Menus/Endpoints/components/__tests__/SpecDescription.spec.tsx
new file mode 100644
index 0000000000..524e1ff583
--- /dev/null
+++ b/client/src/components/Chat/Menus/Endpoints/components/__tests__/SpecDescription.spec.tsx
@@ -0,0 +1,39 @@
+import { render, screen } from '@testing-library/react';
+import SpecDescription from '../SpecDescription';
+
+describe('SpecDescription', () => {
+  it('renders nothing without a description', () => {
+    const { container } = render(<SpecDescription />);
+
+    expect(container).toBeEmptyDOMElement();
+  });
+
+  it('renders plain text descriptions without interpreting markup', () => {
+    render(<SpecDescription description="Fast & accurate < 1s responses" />);
+
+    expect(screen.getByText('Fast & accurate < 1s responses')).toBeInTheDocument();
+  });
+
+  it('renders HTML descriptions with inline images', () => {
+    const { container } = render(
+      <SpecDescription description='<span>Powered by <img src="/assets/claude.png" alt="Claude" /> Claude</span>' />,
+    );
+
+    const image = container.querySelector('img');
+    expect(image).toHaveAttribute('src', '/assets/claude.png');
+    expect(image).toHaveAttribute('alt', 'Claude');
+    expect(container).toHaveTextContent('Powered by Claude');
+  });
+
+  it('strips scripts, event handlers, and unsafe URLs from HTML descriptions', () => {
+    const { container } = render(
+      <SpecDescription description='<span onclick="alert(1)">Safe<script>alert(1)</script><img src="javascript:alert(1)" onerror="alert(1)"></span>' />,
+    );
+
+    expect(container).toHaveTextContent('Safe');
+    expect(container.querySelector('script')).toBeNull();
+    expect(container.querySelector('[onclick]')).toBeNull();
+    expect(container.querySelector('[onerror]')).toBeNull();
+    expect(container.querySelector('img')?.getAttribute('src') ?? '').not.toContain('javascript');
+  });
+});
diff --git a/client/src/utils/__tests__/configHtml.test.ts b/client/src/utils/__tests__/configHtml.test.ts
index 66ee2969e1..70dd242785 100644
--- a/client/src/utils/__tests__/configHtml.test.ts
+++ b/client/src/utils/__tests__/configHtml.test.ts
@@ -2,6 +2,8 @@ import {
   CONFIG_HTML_BLOCK_TAGS,
   CONFIG_HTML_CLASS_ATTR,
   CONFIG_HTML_INLINE_TAGS,
+  CONFIG_HTML_MEDIA_ATTR,
+  CONFIG_HTML_MEDIA_TAGS,
   createConfigHtmlSanitizer,
   sanitizeConfigHtml,
 } from '../configHtml';
@@ -43,4 +45,18 @@ describe('configHtml', () => {
       '<a href="/docs" target="_blank" rel="noopener noreferrer">Docs</a> <a target="_blank" rel="noopener noreferrer">Remote</a>',
     );
   });
+
+  it('keeps inline images with safe sources under media tags', () => {
+    const sanitize = createConfigHtmlSanitizer({
+      allowedTags: CONFIG_HTML_MEDIA_TAGS,
+      allowedAttr: CONFIG_HTML_MEDIA_ATTR,
+    });
+    const sanitized = sanitize(
+      '<span>Powered by <img src="/assets/brand.svg" alt="Brand" onerror="alert(1)"> AI</span><img src="javascript:alert(1)">',
+    );
+
+    expect(sanitized).toBe(
+      '<span>Powered by <img src="/assets/brand.svg" alt="Brand"> AI</span><img>',
+    );
+  });
 });
diff --git a/client/src/utils/configHtml.ts b/client/src/utils/configHtml.ts
index 171b8ce629..8c0cbddcd7 100644
--- a/client/src/utils/configHtml.ts
+++ b/client/src/utils/configHtml.ts
@@ -3,8 +3,10 @@ import DOMPurify from 'dompurify';
 export const CONFIG_HTML_INLINE_TAGS = ['a', 'strong', 'b', 'em', 'i', 'br', 'code'] as const;
 export const CONFIG_HTML_TEXT_TAGS = [...CONFIG_HTML_INLINE_TAGS, 'span'] as const;
 export const CONFIG_HTML_BLOCK_TAGS = [...CONFIG_HTML_TEXT_TAGS, 'p'] as const;
+export const CONFIG_HTML_MEDIA_TAGS = [...CONFIG_HTML_TEXT_TAGS, 'img'] as const;
 export const CONFIG_HTML_LINK_ATTR = ['href', 'target', 'rel'] as const;
 export const CONFIG_HTML_CLASS_ATTR = [...CONFIG_HTML_LINK_ATTR, 'class'] as const;
+export const CONFIG_HTML_MEDIA_ATTR = [...CONFIG_HTML_CLASS_ATTR, 'src', 'alt'] as const;
 
 const CONFIG_HTML_SAFE_URI =
   /^(?:(?:https?|mailto|tel):|(?!(?:\s*[a-z][a-z0-9+.-]*:|\s*\/\/))[\s\S])/i;
diff --git a/e2e/config/librechat.e2e.yaml b/e2e/config/librechat.e2e.yaml
index 82f42782d2..34eeb8b074 100644
--- a/e2e/config/librechat.e2e.yaml
+++ b/e2e/config/librechat.e2e.yaml
@@ -96,3 +96,11 @@ modelSpecs:
       preset:
         endpoint: 'Mock Provider A'
         model: 'mock-model-a'
+
+    - name: 'e2e-branded'
+      label: 'E2E Branded'
+      description: '<strong>Branded</strong> answers <img src="/assets/openai.svg" alt="brand icon">'
+      showOnLanding: true
+      preset:
+        endpoint: 'Mock Provider A'
+        model: 'mock-model-a'
diff --git a/e2e/specs/mock/model-spec-branding.spec.ts b/e2e/specs/mock/model-spec-branding.spec.ts
new file mode 100644
index 0000000000..493572cfd5
--- /dev/null
+++ b/e2e/specs/mock/model-spec-branding.spec.ts
@@ -0,0 +1,47 @@
+import { expect, test } from '@playwright/test';
+import { getPrimaryE2EUser } from '../../setup/users.mock';
+import { NEW_CHAT_PATH, selectModelSpec } from './helpers';
+
+/** Spec with `showOnLanding: true` and an HTML `description` in e2e/config/librechat.e2e.yaml. */
+const BRANDED_SPEC = {
+  label: 'E2E Branded',
+  descriptionText: 'Branded answers',
+  descriptionIcon: '/assets/openai.svg',
+};
+
+/** The `softDefault: true` spec does not set `showOnLanding`, so it is unbranded. */
+const UNBRANDED_SPEC_LABEL = 'E2E Soft Default';
+
+test.describe('model spec branding on landing', () => {
+  test('branded spec replaces the greeting with its label and rendered description', async ({
+    page,
+  }) => {
+    await page.goto(NEW_CHAT_PATH, { timeout: 10000 });
+    await selectModelSpec(page, BRANDED_SPEC.label);
+
+    const main = page.getByRole('main');
+    await expect(main).toContainText(BRANDED_SPEC.label);
+    await expect(main).toContainText(BRANDED_SPEC.descriptionText);
+    await expect(main.locator(`img[src$="${BRANDED_SPEC.descriptionIcon}"]`)).toBeVisible();
+
+    const user = getPrimaryE2EUser();
+    await expect(main).not.toContainText(user.name);
+  });
+
+  test('unbranded spec keeps the personalized greeting', async ({ page }) => {
+    await page.goto(NEW_CHAT_PATH, { timeout: 10000 });
+    await selectModelSpec(page, UNBRANDED_SPEC_LABEL);
+
+    const user = getPrimaryE2EUser();
+    await expect(page.getByRole('main')).toContainText(user.name);
+  });
+
+  test('branded spec renders its description in the model selector', async ({ page }) => {
+    await page.goto(NEW_CHAT_PATH, { timeout: 10000 });
+
+    await page.getByRole('button', { name: 'Select a model' }).first().click();
+    const option = page.getByRole('option', { name: new RegExp(BRANDED_SPEC.label) });
+    await expect(option).toContainText(BRANDED_SPEC.descriptionText);
+    await expect(option.locator(`img[src$="${BRANDED_SPEC.descriptionIcon}"]`)).toBeVisible();
+  });
+});
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 636e62a6f5..800e71f69d 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -219,7 +219,10 @@ export default [
     })),
   {
     files: ['**/*.ts', '**/*.tsx'],
-    ignores: ['packages/**/*', 'client/vite.config.ts'],
+    // e2e specs are not part of `client/tsconfig.json`'s program, so typed
+    // linting them errors with "file not found in project"; they still get
+    // the non-type-checked recommended rules from the block above.
+    ignores: ['packages/**/*', 'client/vite.config.ts', 'e2e/**/*'],
     plugins: {
       '@typescript-eslint': typescriptEslintEslintPlugin,
       jest: fixupPluginRules(jest),
diff --git a/packages/data-provider/src/models.ts b/packages/data-provider/src/models.ts
index 0bfc68e067..30c89899d2 100644
--- a/packages/data-provider/src/models.ts
+++ b/packages/data-provider/src/models.ts
@@ -33,6 +33,8 @@ export type TModelSpec = {
   groupIcon?: string | EModelEndpoint;
   showIconInMenu?: boolean;
   showIconInHeader?: boolean;
+  /** Show this spec's label and description on the chat landing in place of the greeting. */
+  showOnLanding?: boolean;
   iconURL?: string | EModelEndpoint; // Allow using project-included icons
   authType?: AuthType;
   /** Hide the chat input tool badge row while this model spec is active. */
@@ -64,6 +66,7 @@ export const tModelSpecSchema = z.object({
   groupIcon: z.union([z.string(), eModelEndpointSchema]).optional(),
   showIconInMenu: z.boolean().optional(),
   showIconInHeader: z.boolean().optional(),
+  showOnLanding: z.boolean().optional(),
   iconURL: z.union([z.string(), eModelEndpointSchema]).optional(),
   authType: authTypeSchema.optional(),
   hideBadgeRow: z.boolean().optional(),