include office xml formats in desktop mode/treat as text

Author: evalstate

src/index.ts

@@ -99,8 +99,12 @@ server.setRequestHandler(CallToolRequestSchema, async (request) => {
     return {
       content: [
         {
-          type: `text`,
-          text: await workingDir.generateResourceTable(),
+          type: `resource`,
+          resource: {
+            uri: `/available-files`,
+            mimeType: `text/markdown`,
+            text: await workingDir.generateResourceTable(),
+          },
         },
       ],
     };

src/mime_types.ts

@@ -40,5 +40,6 @@ export const FALLBACK_MIME_TYPE='application/octet-stream';
 export function treatAsText(mimetype: string){
     if(mimetype.startsWith('text/')) return true;
     if(textBasedMimeTypes.includes(mimetype as any)) return true;
+    if(mimetype.indexOf('vnd.openxmlformats') > 0) return true;
     return false;
 }

src/working_directory.ts

@@ -2,7 +2,7 @@ import { Dirent, promises as fs } from "fs";
 import path from "path";
 import mime from "mime";
 import { pathToFileURL } from "url";
-import { FALLBACK_MIME_TYPE } from "./mime_types.js";
+import { FALLBACK_MIME_TYPE, treatAsText } from "./mime_types.js";
 import { claudeSupportedMimeTypes } from "./mime_types.js";
 
 export interface ResourceFile {
@@ -64,7 +64,6 @@ export class WorkingDirectory {
     return pathToFileURL(path.resolve(this.directory, filename)).href;
   }
 
-  // Rename isSupported to isSupportedFile for clarity
   async isSupportedFile(filename: string): Promise<boolean> {
     if (!this.claudeDesktopMode) return true;
 
@@ -74,7 +73,7 @@ export class WorkingDirectory {
 
       const mimetype = mime.getType(filename);
       if (!mimetype) return false;
-
+      if(treatAsText(mimetype)) return true;
       return claudeSupportedMimeTypes.some((supported) => {
         if (!supported.includes("/*")) return supported === mimetype;
         const supportedMainType = supported.split("/")[0];