diff --git a/src/main/group-chat/group-chat-router.ts b/src/main/group-chat/group-chat-router.ts
index 0bdac435..b6b6541a 100644
--- a/src/main/group-chat/group-chat-router.ts
+++ b/src/main/group-chat/group-chat-router.ts
@@ -8,7 +8,7 @@
  * - Participants -> Moderator
  */
 
-import { GroupChatParticipant, loadGroupChat, updateParticipant, addGroupChatHistoryEntry, extractFirstSentence } from './group-chat-storage';
+import { GroupChatParticipant, loadGroupChat, updateParticipant, addGroupChatHistoryEntry, extractFirstSentence, getGroupChatDir } from './group-chat-storage';
 import { appendToLog, readLog } from './group-chat-log';
 import { type GroupChatMessage, mentionMatches } from '../../shared/group-chat-types';
 import {
@@ -647,10 +647,14 @@ export async function routeModeratorResponse(
         ? ' Remember: READ-ONLY mode is active, do not modify any files.'
         : ' If you need to perform any actions, do so and report your findings.';
 
+      // Get the group chat folder path for file access permissions
+      const groupChatFolder = getGroupChatDir(groupChatId);
+
       const participantPrompt = groupChatParticipantRequestPrompt
         .replace(/\{\{PARTICIPANT_NAME\}\}/g, participantName)
         .replace(/\{\{GROUP_CHAT_NAME\}\}/g, updatedChat.name)
         .replace(/\{\{READ_ONLY_NOTE\}\}/g, readOnlyNote)
+        .replace(/\{\{GROUP_CHAT_FOLDER\}\}/g, groupChatFolder)
         .replace(/\{\{HISTORY_CONTEXT\}\}/g, historyContext)
         .replace(/\{\{READ_ONLY_LABEL\}\}/g, readOnlyLabel)
         .replace(/\{\{MESSAGE\}\}/g, message)
diff --git a/src/main/group-chat/group-chat-storage.ts b/src/main/group-chat/group-chat-storage.ts
index 7621c3ff..a4913295 100644
--- a/src/main/group-chat/group-chat-storage.ts
+++ b/src/main/group-chat/group-chat-storage.ts
@@ -106,7 +106,7 @@ export function getGroupChatsDir(): string {
 /**
  * Get the directory path for a specific group chat
  */
-function getGroupChatDir(id: string): string {
+export function getGroupChatDir(id: string): string {
   return path.join(getGroupChatsDir(), id);
 }
 
diff --git a/src/prompts/group-chat-participant-request.md b/src/prompts/group-chat-participant-request.md
index 4d3bdec2..cd73be0b 100644
--- a/src/prompts/group-chat-participant-request.md
+++ b/src/prompts/group-chat-participant-request.md
@@ -6,6 +6,13 @@ Respond to the moderator's request below. Your response will be shared with the
 **IMPORTANT RESPONSE FORMAT:**
 Your response MUST begin with a single-sentence summary of what you accomplished or are reporting. This first sentence will be extracted for the group chat history. Keep it concise and action-oriented.
 
+## File Access
+You have permission to read and write files in:
+- Your configured working directory (your project folder)
+- The group chat shared folder: {{GROUP_CHAT_FOLDER}}
+
+The shared folder contains chat logs and can be used for collaborative file exchange between participants.
+
 ## Recent Chat History:
 {{HISTORY_CONTEXT}}