chore: bring back file search and ocr options

- Add comprehensive debug logging throughout PDF processing pipeline
- Refactor attachment processing to separate image and document handling
- Create distinct addImageURLs(), addDocuments(), and processAttachments() methods
- Fix critical bugs in stream handling and parameter passing
- Add streamToBuffer utility for proper stream-to-buffer conversion
- Remove api/agents submodule from repository

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

api/app/clients/AnthropicClient.js

@@ -27,6 +27,7 @@ const {
 const { getModelMaxTokens, getModelMaxOutputTokens, matchModelName } = require('~/utils');
 const { spendTokens, spendStructuredTokens } = require('~/models/spendTokens');
 const { encodeAndFormat } = require('~/server/services/Files/images/encode');
+const { encodeAndFormatDocuments } = require('~/server/services/Files/documents');
 const { sleep } = require('~/server/utils');
 const BaseClient = require('./BaseClient');
 const { logger } = require('~/config');
@@ -312,6 +313,33 @@ class AnthropicClient extends BaseClient {
     return files;
   }
 
+  async addDocuments(message, attachments) {
+    // Only process documents
+    const documentResult = await encodeAndFormatDocuments(
+      this.options.req,
+      attachments,
+      EModelEndpoint.anthropic,
+    );
+
+    message.documents =
+      documentResult.documents && documentResult.documents.length
+        ? documentResult.documents
+        : undefined;
+
+    return documentResult.files;
+  }
+
+  async processAttachments(message, attachments) {
+    // Process both images and documents
+    const [imageFiles, documentFiles] = await Promise.all([
+      this.addImageURLs(message, attachments),
+      this.addDocuments(message, attachments),
+    ]);
+
+    // Combine files from both processors
+    return [...imageFiles, ...documentFiles];
+  }
+
   /**
    * @param {object} params
    * @param {number} params.promptTokens
@@ -382,7 +410,7 @@ class AnthropicClient extends BaseClient {
         };
       }
 
-      const files = await this.addImageURLs(latestMessage, attachments);
+      const files = await this.processAttachments(latestMessage, attachments);
 
       this.options.attachments = files;
     }
@@ -941,7 +969,7 @@ class AnthropicClient extends BaseClient {
       const content = `<conversation_context>
   ${convo}
   </conversation_context>
-  
+
   Please generate a title for this conversation.`;
 
       const titleMessage = { role: 'user', content };

api/app/clients/BaseClient.js

@@ -1233,7 +1233,7 @@ class BaseClient {
         {},
       );
 
-      await this.addImageURLs(message, files, this.visionMode);
+      await this.processAttachments(message, files, this.visionMode);
 
       this.message_file_map[message.messageId] = files;
       return message;

api/app/clients/GoogleClient.js

@@ -268,7 +268,7 @@ class GoogleClient extends BaseClient {
     const formattedMessages = [];
     const attachments = await this.options.attachments;
     const latestMessage = { ...messages[messages.length - 1] };
-    const files = await this.addImageURLs(latestMessage, attachments, VisionModes.generative);
+    const files = await this.processAttachments(latestMessage, attachments, VisionModes.generative);
     this.options.attachments = files;
     messages[messages.length - 1] = latestMessage;
 
@@ -312,6 +312,20 @@ class GoogleClient extends BaseClient {
     return files;
   }
 
+  // eslint-disable-next-line no-unused-vars
+  async addDocuments(message, attachments) {
+    // GoogleClient doesn't support document processing yet
+    // Return empty results for consistency
+    return [];
+  }
+
+  async processAttachments(message, attachments, mode = '') {
+    // For GoogleClient, only process images
+    const imageFiles = await this.addImageURLs(message, attachments, mode);
+    const documentFiles = await this.addDocuments(message, attachments);
+    return [...imageFiles, ...documentFiles];
+  }
+
   /**
    * Builds the augmented prompt for attachments
    * TODO: Add File API Support
@@ -345,7 +359,7 @@ class GoogleClient extends BaseClient {
 
     const { prompt } = await this.buildMessagesPrompt(messages, parentMessageId);
 
-    const files = await this.addImageURLs(latestMessage, attachments);
+    const files = await this.processAttachments(latestMessage, attachments);
 
     this.options.attachments = files;
 

api/app/clients/OpenAIClient.js

@@ -372,6 +372,19 @@ class OpenAIClient extends BaseClient {
     return files;
   }
 
+  async addDocuments(message, attachments) {
+    // OpenAI doesn't support native document processing yet
+    // Return empty results for consistency
+    return [];
+  }
+
+  async processAttachments(message, attachments) {
+    // For OpenAI, only process images
+    const imageFiles = await this.addImageURLs(message, attachments);
+    const documentFiles = await this.addDocuments(message, attachments);
+    return [...imageFiles, ...documentFiles];
+  }
+
   async buildMessages(messages, parentMessageId, { promptPrefix = null }, opts) {
     let orderedMessages = this.constructor.getMessagesForConversation({
       messages,
@@ -400,7 +413,7 @@ class OpenAIClient extends BaseClient {
         };
       }
 
-      const files = await this.addImageURLs(
+      const files = await this.processAttachments(
         orderedMessages[orderedMessages.length - 1],
         attachments,
       );

api/app/clients/prompts/formatMessages.js

@@ -3,24 +3,61 @@ const { EModelEndpoint, ContentTypes } = require('librechat-data-provider');
 const { HumanMessage, AIMessage, SystemMessage } = require('@langchain/core/messages');
 
 /**
- * Formats a message to OpenAI Vision API payload format.
+ * Formats a message with document attachments for specific endpoints.
  *
  * @param {Object} params - The parameters for formatting.
  * @param {Object} params.message - The message object to format.
- * @param {string} [params.message.role] - The role of the message sender (must be 'user').
- * @param {string} [params.message.content] - The text content of the message.
+ * @param {Array<Object>} [params.documents] - The document attachments for the message.
  * @param {EModelEndpoint} [params.endpoint] - Identifier for specific endpoint handling
+ * @returns {(Object)} - The formatted message.
+ */
+const formatDocumentMessage = ({ message, documents, endpoint }) => {
+  const contentParts = [];
+
+  // Add documents first (for Anthropic PDFs)
+  if (documents && documents.length > 0) {
+    contentParts.push(...documents);
+  }
+
+  // Add text content
+  contentParts.push({ type: ContentTypes.TEXT, text: message.content });
+
+  if (endpoint === EModelEndpoint.anthropic) {
+    message.content = contentParts;
+    return message;
+  }
+
+  // For other endpoints, might need different handling
+  message.content = contentParts;
+  return message;
+};
+
+/**
+ * Formats a message with vision capabilities (image_urls) for specific endpoints.
+ *
+ * @param {Object} params - The parameters for formatting.
+ * @param {Object} params.message - The message object to format.
  * @param {Array<string>} [params.image_urls] - The image_urls to attach to the message.
+ * @param {EModelEndpoint} [params.endpoint] - Identifier for specific endpoint handling
  * @returns {(Object)} - The formatted message.
  */
 const formatVisionMessage = ({ message, image_urls, endpoint }) => {
+  const contentParts = [];
+
+  // Add images
+  if (image_urls && image_urls.length > 0) {
+    contentParts.push(...image_urls);
+  }
+
+  // Add text content
+  contentParts.push({ type: ContentTypes.TEXT, text: message.content });
+
   if (endpoint === EModelEndpoint.anthropic) {
-    message.content = [...image_urls, { type: ContentTypes.TEXT, text: message.content }];
+    message.content = contentParts;
     return message;
   }
 
   message.content = [{ type: ContentTypes.TEXT, text: message.content }, ...image_urls];
-
   return message;
 };
 
@@ -58,7 +95,18 @@ const formatMessage = ({ message, userName, assistantName, endpoint, langChain =
     content,
   };
 
-  const { image_urls } = message;
+  const { image_urls, documents } = message;
+
+  // Handle documents
+  if (Array.isArray(documents) && documents.length > 0 && role === 'user') {
+    return formatDocumentMessage({
+      message: formattedMessage,
+      documents: message.documents,
+      endpoint,
+    });
+  }
+
+  // Handle images
   if (Array.isArray(image_urls) && image_urls.length > 0 && role === 'user') {
     return formatVisionMessage({
       message: formattedMessage,
@@ -146,7 +194,21 @@ const formatAgentMessages = (payload) => {
       message.content = [{ type: ContentTypes.TEXT, [ContentTypes.TEXT]: message.content }];
     }
     if (message.role !== 'assistant') {
-      messages.push(formatMessage({ message, langChain: true }));
+      // Check if message has documents and preserve array structure
+      const hasDocuments =
+        Array.isArray(message.content) &&
+        message.content.some((part) => part && part.type === 'document');
+
+      if (hasDocuments && message.role === 'user') {
+        // For user messages with documents, create HumanMessage directly with array content
+        messages.push(new HumanMessage({ content: message.content }));
+      } else if (hasDocuments && message.role === 'system') {
+        // For system messages with documents, create SystemMessage directly with array content
+        messages.push(new SystemMessage({ content: message.content }));
+      } else {
+        // Use regular formatting for messages without documents
+        messages.push(formatMessage({ message, langChain: true }));
+      }
       continue;
     }
 
@@ -239,6 +301,8 @@ const formatAgentMessages = (payload) => {
 
 module.exports = {
   formatMessage,
+  formatDocumentMessage,
+  formatVisionMessage,
   formatFromLangChain,
   formatAgentMessages,
   formatLangChainMessages,

api/server/controllers/agents/client.js

@@ -226,6 +226,42 @@ class AgentClient extends BaseClient {
     return files;
   }
 
+  async addDocuments(message, attachments) {
+    const documentResult =
+      await require('~/server/services/Files/documents').encodeAndFormatDocuments(
+        this.options.req,
+        attachments,
+        this.options.agent.provider,
+      );
+    message.documents =
+      documentResult.documents && documentResult.documents.length
+        ? documentResult.documents
+        : undefined;
+    return documentResult.files;
+  }
+
+  async processAttachments(message, attachments) {
+    const [imageFiles, documentFiles] = await Promise.all([
+      this.addImageURLs(message, attachments),
+      this.addDocuments(message, attachments),
+    ]);
+
+    const allFiles = [...imageFiles, ...documentFiles];
+    const seenFileIds = new Set();
+    const uniqueFiles = [];
+
+    for (const file of allFiles) {
+      if (file.file_id && !seenFileIds.has(file.file_id)) {
+        seenFileIds.add(file.file_id);
+        uniqueFiles.push(file);
+      } else if (!file.file_id) {
+        uniqueFiles.push(file);
+      }
+    }
+
+    return uniqueFiles;
+  }
+
   async buildMessages(
     messages,
     parentMessageId,
@@ -259,7 +295,7 @@ class AgentClient extends BaseClient {
         };
       }
 
-      const files = await this.addImageURLs(
+      const files = await this.processAttachments(
         orderedMessages[orderedMessages.length - 1],
         attachments,
       );
@@ -282,6 +318,23 @@ class AgentClient extends BaseClient {
         assistantName: this.options?.modelLabel,
       });
 
+      if (
+        message.documents &&
+        message.documents.length > 0 &&
+        message.role === 'user' &&
+        this.options.agent.provider === EModelEndpoint.anthropic
+      ) {
+        const contentParts = [];
+        contentParts.push(...message.documents);
+        if (message.image_urls && message.image_urls.length > 0) {
+          contentParts.push(...message.image_urls);
+        }
+        const textContent =
+          typeof formattedMessage.content === 'string' ? formattedMessage.content : '';
+        contentParts.push({ type: 'text', text: textContent });
+        formattedMessage.content = contentParts;
+      }
+
       if (message.ocr && i !== orderedMessages.length - 1) {
         if (typeof formattedMessage.content === 'string') {
           formattedMessage.content = message.ocr + '\n' + formattedMessage.content;
@@ -777,6 +830,51 @@ class AgentClient extends BaseClient {
       };
 
       const toolSet = new Set((this.options.agent.tools ?? []).map((tool) => tool && tool.name));
+
+      if (
+        this.options.agent.provider === EModelEndpoint.anthropic &&
+        payload &&
+        Array.isArray(payload)
+      ) {
+        let userMessageWithDocs = null;
+
+        if (this.userMessage?.documents) {
+          userMessageWithDocs = this.userMessage;
+        } else if (this.currentMessages?.length > 0) {
+          const lastMessage = this.currentMessages[this.currentMessages.length - 1];
+          if (lastMessage.documents?.length > 0) {
+            userMessageWithDocs = lastMessage;
+          }
+        } else if (this.messages?.length > 0) {
+          const lastMessage = this.messages[this.messages.length - 1];
+          if (lastMessage.documents?.length > 0) {
+            userMessageWithDocs = lastMessage;
+          }
+        }
+
+        if (userMessageWithDocs) {
+          for (const payloadMessage of payload) {
+            if (
+              payloadMessage.role === 'user' &&
+              userMessageWithDocs.text === payloadMessage.content
+            ) {
+              if (typeof payloadMessage.content === 'string') {
+                payloadMessage.content = [
+                  ...userMessageWithDocs.documents,
+                  { type: 'text', text: payloadMessage.content },
+                ];
+              } else if (Array.isArray(payloadMessage.content)) {
+                payloadMessage.content = [
+                  ...userMessageWithDocs.documents,
+                  ...payloadMessage.content,
+                ];
+              }
+              break;
+            }
+          }
+        }
+      }
+
       let { messages: initialMessages, indexTokenCountMap } = formatAgentMessages(
         payload,
         this.indexTokenCountMap,

api/server/services/Files/documents/encode.js

@@ -0,0 +1,166 @@
+const { EModelEndpoint } = require('librechat-data-provider');
+const { getStrategyFunctions } = require('~/server/services/Files/strategies');
+const { validateAnthropicPdf } = require('../validation/pdfValidator');
+
+/**
+ * Converts a readable stream to a buffer.
+ *
+ * @param {NodeJS.ReadableStream} stream - The readable stream to convert.
+ * @returns {Promise<Buffer>} - Promise resolving to the buffer.
+ */
+async function streamToBuffer(stream) {
+  return new Promise((resolve, reject) => {
+    const chunks = [];
+
+    stream.on('data', (chunk) => {
+      chunks.push(chunk);
+    });
+
+    stream.on('end', () => {
+      try {
+        const buffer = Buffer.concat(chunks);
+        chunks.length = 0; // Clear the array
+        resolve(buffer);
+      } catch (err) {
+        reject(err);
+      }
+    });
+
+    stream.on('error', (error) => {
+      chunks.length = 0;
+      reject(error);
+    });
+  }).finally(() => {
+    // Clean up the stream if required
+    if (stream.destroy && typeof stream.destroy === 'function') {
+      stream.destroy();
+    }
+  });
+}
+
+/**
+ * Processes and encodes document files for various endpoints
+ *
+ * @param {Express.Request} req - Express request object
+ * @param {MongoFile[]} files - Array of file objects to process
+ * @param {string} endpoint - The endpoint identifier (e.g., EModelEndpoint.anthropic)
+ * @returns {Promise<{documents: MessageContentDocument[], files: MongoFile[]}>}
+ */
+async function encodeAndFormatDocuments(req, files, endpoint) {
+  const promises = [];
+  /** @type {Record<FileSources, Pick<ReturnType<typeof getStrategyFunctions>, 'prepareDocumentPayload' | 'getDownloadStream'>>} */
+  const encodingMethods = {};
+  /** @type {{ documents: MessageContentDocument[]; files: MongoFile[] }} */
+  const result = {
+    documents: [],
+    files: [],
+  };
+
+  if (!files || !files.length) {
+    return result;
+  }
+
+  // Filter for document files only
+  const documentFiles = files.filter(
+    (file) => file.type === 'application/pdf' || file.type?.startsWith('application/'), // Future: support for other document types
+  );
+
+  if (!documentFiles.length) {
+    return result;
+  }
+
+  for (let file of documentFiles) {
+    /** @type {FileSources} */
+    const source = file.source ?? 'local';
+
+    // Only process PDFs for Anthropic for now
+    if (file.type !== 'application/pdf' || endpoint !== EModelEndpoint.anthropic) {
+      continue;
+    }
+
+    if (!encodingMethods[source]) {
+      encodingMethods[source] = getStrategyFunctions(source);
+    }
+
+    // Prepare file metadata
+    const fileMetadata = {
+      file_id: file.file_id || file._id,
+      temp_file_id: file.temp_file_id,
+      filepath: file.filepath,
+      source: file.source,
+      filename: file.filename,
+      type: file.type,
+    };
+
+    promises.push([file, fileMetadata]);
+  }
+
+  const results = await Promise.allSettled(
+    promises.map(async ([file, fileMetadata]) => {
+      if (!file || !fileMetadata) {
+        return { file: null, content: null, metadata: fileMetadata };
+      }
+
+      try {
+        const source = file.source ?? 'local';
+        const { getDownloadStream } = encodingMethods[source];
+
+        const stream = await getDownloadStream(req, file.filepath);
+        const buffer = await streamToBuffer(stream);
+        const documentContent = buffer.toString('base64');
+
+        return {
+          file,
+          content: documentContent,
+          metadata: fileMetadata,
+        };
+      } catch (error) {
+        console.error(`Error processing document ${file.filename}:`, error);
+        return { file, content: null, metadata: fileMetadata };
+      }
+    }),
+  );
+
+  for (const settledResult of results) {
+    if (settledResult.status === 'rejected') {
+      console.error('Document processing failed:', settledResult.reason);
+      continue;
+    }
+
+    const { file, content, metadata } = settledResult.value;
+
+    if (!content || !file) {
+      if (metadata) {
+        result.files.push(metadata);
+      }
+      continue;
+    }
+
+    if (file.type === 'application/pdf' && endpoint === EModelEndpoint.anthropic) {
+      const pdfBuffer = Buffer.from(content, 'base64');
+      const validation = await validateAnthropicPdf(pdfBuffer, pdfBuffer.length);
+
+      if (!validation.isValid) {
+        throw new Error(`PDF validation failed: ${validation.error}`);
+      }
+
+      const documentPart = {
+        type: 'document',
+        source: {
+          type: 'base64',
+          media_type: 'application/pdf',
+          data: content,
+        },
+      };
+
+      result.documents.push(documentPart);
+      result.files.push(metadata);
+    }
+  }
+
+  return result;
+}
+
+module.exports = {
+  encodeAndFormatDocuments,
+};

api/server/services/Files/documents/index.js

@@ -0,0 +1,5 @@
+const { encodeAndFormatDocuments } = require('./encode');
+
+module.exports = {
+  encodeAndFormatDocuments,
+};

api/server/services/Files/process.js

@@ -391,7 +391,17 @@ const processFileUpload = async ({ req, res, metadata }) => {
   const isAssistantUpload = isAssistantsEndpoint(metadata.endpoint);
   const assistantSource =
     metadata.endpoint === EModelEndpoint.azureAssistants ? FileSources.azure : FileSources.openai;
-  const source = isAssistantUpload ? assistantSource : FileSources.vectordb;
+
+  // Use local storage for Anthropic native PDF support, vectordb for others
+  const isAnthropicUpload = metadata.endpoint === EModelEndpoint.anthropic;
+  let source;
+  if (isAssistantUpload) {
+    source = assistantSource;
+  } else if (isAnthropicUpload) {
+    source = FileSources.local;
+  } else {
+    source = FileSources.vectordb;
+  }
   const { handleFileUpload } = getStrategyFunctions(source);
   const { file_id, temp_file_id } = metadata;
 

api/server/services/Files/validation/pdfValidator.js

@@ -0,0 +1,77 @@
+const { logger } = require('~/config');
+const { anthropicPdfSizeLimit } = require('librechat-data-provider');
+
+/**
+ * Validates if a PDF meets Anthropic's requirements
+ * @param {Buffer} pdfBuffer - The PDF file as a buffer
+ * @param {number} fileSize - The file size in bytes
+ * @returns {Promise<{isValid: boolean, error?: string}>}
+ */
+async function validateAnthropicPdf(pdfBuffer, fileSize) {
+  try {
+    // Check file size (32MB limit)
+    if (fileSize > anthropicPdfSizeLimit) {
+      return {
+        isValid: false,
+        error: `PDF file size (${Math.round(fileSize / (1024 * 1024))}MB) exceeds Anthropic's 32MB limit`,
+      };
+    }
+
+    // Basic PDF header validation
+    if (!pdfBuffer || pdfBuffer.length < 5) {
+      return {
+        isValid: false,
+        error: 'Invalid PDF file: too small or corrupted',
+      };
+    }
+
+    // Check PDF magic bytes
+    const pdfHeader = pdfBuffer.subarray(0, 5).toString();
+    if (!pdfHeader.startsWith('%PDF-')) {
+      return {
+        isValid: false,
+        error: 'Invalid PDF file: missing PDF header',
+      };
+    }
+
+    // Check for password protection/encryption
+    const pdfContent = pdfBuffer.toString('binary');
+    if (
+      pdfContent.includes('/Encrypt ') ||
+      pdfContent.includes('/U (') ||
+      pdfContent.includes('/O (')
+    ) {
+      return {
+        isValid: false,
+        error: 'PDF is password-protected or encrypted. Anthropic requires unencrypted PDFs.',
+      };
+    }
+
+    // Estimate page count (this is a rough estimation)
+    const pageMatches = pdfContent.match(/\/Type[\s]*\/Page[^s]/g);
+    const estimatedPages = pageMatches ? pageMatches.length : 1;
+
+    if (estimatedPages > 100) {
+      return {
+        isValid: false,
+        error: `PDF has approximately ${estimatedPages} pages, exceeding Anthropic's 100-page limit`,
+      };
+    }
+
+    logger.debug(
+      `PDF validation passed: ${Math.round(fileSize / 1024)}KB, ~${estimatedPages} pages`,
+    );
+
+    return { isValid: true };
+  } catch (error) {
+    logger.error('PDF validation error:', error);
+    return {
+      isValid: false,
+      error: 'Failed to validate PDF file',
+    };
+  }
+}
+
+module.exports = {
+  validateAnthropicPdf,
+};

client/src/components/Chat/Input/Files/AttachFileChat.tsx

@@ -36,6 +36,7 @@ function AttachFileChat({ disableInputs }: { disableInputs: boolean }) {
         disabled={disableInputs}
         conversationId={conversationId}
         endpointFileConfig={endpointFileConfig}
+        endpoint={endpoint}
       />
     );
   }

client/src/components/Chat/Input/Files/AttachFileMenu.tsx

@@ -1,7 +1,7 @@
 import React, { useRef, useState, useMemo } from 'react';
 import * as Ariakit from '@ariakit/react';
 import { useSetRecoilState } from 'recoil';
-import { FileSearch, ImageUpIcon, TerminalSquareIcon, FileType2Icon } from 'lucide-react';
+import { FileSearch, ImageUpIcon, TerminalSquareIcon, FileType2Icon, FileText } from 'lucide-react';
 import { FileUpload, TooltipAnchor, DropdownPopup, AttachmentIcon } from '@librechat/client';
 import { EToolResources, EModelEndpoint, defaultAgentCapabilities } from 'librechat-data-provider';
 import type { EndpointFileConfig } from 'librechat-data-provider';
@@ -13,9 +13,15 @@ interface AttachFileMenuProps {
   conversationId: string;
   disabled?: boolean | null;
   endpointFileConfig?: EndpointFileConfig;
+  endpoint?: string | null;
 }
 
-const AttachFileMenu = ({ disabled, conversationId, endpointFileConfig }: AttachFileMenuProps) => {
+const AttachFileMenu = ({
+  disabled,
+  conversationId,
+  endpointFileConfig,
+  endpoint,
+}: AttachFileMenuProps) => {
   const localize = useLocalize();
   const isUploadDisabled = disabled ?? false;
   const inputRef = useRef<HTMLInputElement>(null);
@@ -23,7 +29,7 @@ const AttachFileMenu = ({ disabled, conversationId, endpointFileConfig }: Attach
   const setEphemeralAgent = useSetRecoilState(ephemeralAgentByConvoId(conversationId));
   const [toolResource, setToolResource] = useState<EToolResources | undefined>();
   const { handleFileChange } = useFileHandling({
-    overrideEndpoint: EModelEndpoint.agents,
+    overrideEndpoint: endpoint === EModelEndpoint.anthropic ? undefined : EModelEndpoint.agents,
     overrideEndpointFileConfig: endpointFileConfig,
   });
 
@@ -34,12 +40,18 @@ const AttachFileMenu = ({ disabled, conversationId, endpointFileConfig }: Attach
    * */
   const capabilities = useAgentCapabilities(agentsConfig?.capabilities ?? defaultAgentCapabilities);
 
-  const handleUploadClick = (isImage?: boolean) => {
+  const handleUploadClick = (fileType?: 'image' | 'document') => {
     if (!inputRef.current) {
       return;
     }
     inputRef.current.value = '';
-    inputRef.current.accept = isImage === true ? 'image/*' : '';
+    if (fileType === 'image') {
+      inputRef.current.accept = 'image/*';
+    } else if (fileType === 'document') {
+      inputRef.current.accept = '.pdf,application/pdf';
+    } else {
+      inputRef.current.accept = '';
+    }
     inputRef.current.click();
     inputRef.current.accept = '';
   };
@@ -50,12 +62,24 @@ const AttachFileMenu = ({ disabled, conversationId, endpointFileConfig }: Attach
         label: localize('com_ui_upload_image_input'),
         onClick: () => {
           setToolResource(undefined);
-          handleUploadClick(true);
+          handleUploadClick('image');
         },
         icon: <ImageUpIcon className="icon-md" />,
       },
     ];
 
+    // Add document upload option for Anthropic endpoints
+    if (endpoint === EModelEndpoint.anthropic) {
+      items.push({
+        label: 'Upload to Provider',
+        onClick: () => {
+          setToolResource(undefined);
+          handleUploadClick('document');
+        },
+        icon: <FileText className="icon-md" />,
+      });
+    }
+
     if (capabilities.ocrEnabled) {
       items.push({
         label: localize('com_ui_upload_ocr_text'),
@@ -95,7 +119,7 @@ const AttachFileMenu = ({ disabled, conversationId, endpointFileConfig }: Attach
     }
 
     return items;
-  }, [capabilities, localize, setToolResource, setEphemeralAgent]);
+  }, [capabilities, localize, setToolResource, setEphemeralAgent, endpoint]);
 
   const menuTrigger = (
     <TooltipAnchor

packages/data-provider/src/file-config.ts

@@ -169,6 +169,10 @@ export const megabyte = 1024 * 1024;
 export const mbToBytes = (mb: number): number => mb * megabyte;
 
 const defaultSizeLimit = mbToBytes(512);
+
+// Anthropic PDF limits: 32MB max, 100 pages max
+export const anthropicPdfSizeLimit = mbToBytes(32);
+
 const assistantsFileConfig = {
   fileLimit: 10,
   fileSizeLimit: defaultSizeLimit,
@@ -182,6 +186,14 @@ export const fileConfig = {
     [EModelEndpoint.assistants]: assistantsFileConfig,
     [EModelEndpoint.azureAssistants]: assistantsFileConfig,
     [EModelEndpoint.agents]: assistantsFileConfig,
+    [EModelEndpoint.anthropic]: {
+      fileLimit: 10,
+      fileSizeLimit: defaultSizeLimit,
+      totalSizeLimit: defaultSizeLimit,
+      supportedMimeTypes,
+      disabled: false,
+      pdfSizeLimit: anthropicPdfSizeLimit,
+    },
     default: {
       fileLimit: 10,
       fileSizeLimit: defaultSizeLimit,