diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f88939..19c0b5d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,46 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.6.1] - 2025-01-26
+
+### Added
+- Support for nested comment replies in Bitbucket Server
+  - Added `replies` field to `FormattedComment` interface to support nested comment threads
+  - Comments now include nested replies that are still relevant (not orphaned or resolved)
+  - Total and active comment counts now include nested replies
+
+### Changed
+- Updated comment fetching logic to handle Bitbucket Server's nested comment structure
+  - Server uses `comments` array inside each comment object for replies
+  - Cloud continues to use `parent` field for reply relationships
+- Improved comment filtering to exclude orphaned inline comments when code has changed
+
+### Fixed
+- Fixed missing comment replies in PR details - replies are now properly included in the response
+
+## [0.6.0] - 2025-01-26
+
+### Added
+- **Enhanced `get_pull_request` with active comments and file changes**:
+  - Fetches and displays active (unresolved) comments that need attention
+  - Shows up to 20 most recent active comments with:
+    - Comment text, author, and creation date
+    - Inline comment details (file path and line number)
+    - Comment state (OPEN/RESOLVED for Server)
+  - Provides comment counts:
+    - `active_comment_count`: Total unresolved comments
+    - `total_comment_count`: Total comments including resolved
+  - Includes file change statistics:
+    - List of all modified files with lines added/removed
+    - File status (added, modified, removed, renamed)
+    - Summary statistics (total files, lines added/removed)
+- Added new TypeScript interfaces for comments and file changes
+- Added `FormattedComment` and `FormattedFileChange` types for consistent response format
+
+### Changed
+- Modified `handleGetPullRequest` to make parallel API calls for better performance
+- Enhanced error handling to gracefully continue if comment/file fetching fails
+
 ## [0.5.0] - 2025-01-21
 
 ### Added
diff --git a/README.md b/README.md
index 44e0ad7..e85bdfc 100644
--- a/README.md
+++ b/README.md
@@ -188,6 +188,25 @@ Returns detailed information about the pull request including:
   - `merged_by`: Who performed the merge
   - `merged_at`: When the merge occurred
   - `merge_commit_message`: The merge commit message
+- **Active comments with nested replies** (unresolved comments that need attention):
+  - `active_comments`: Array of active comments (up to 20 most recent top-level comments)
+    - Comment text and author
+    - Creation date
+    - Whether it's an inline comment (with file path and line number)
+    - **Nested replies** (for Bitbucket Server):
+      - `replies`: Array of reply comments with same structure
+      - Replies can be nested multiple levels deep
+    - **Parent reference** (for Bitbucket Cloud):
+      - `parent_id`: ID of the parent comment for replies
+  - `active_comment_count`: Total count of unresolved comments (including nested replies)
+  - `total_comment_count`: Total count of all comments (including resolved and replies)
+- **File changes**:
+  - `file_changes`: Array of all files modified in the PR
+    - File path
+    - Status (added, modified, removed, or renamed)
+    - Old path (for renamed files)
+  - `file_changes_summary`: Summary statistics
+    - Total files changed
 - And more...
 
 ### List Pull Requests
@@ -252,7 +271,7 @@ Returns a paginated list of pull requests with:
 
 ### Add Comment
 
-Add general comments or inline comments on specific lines of code:
+Add general comments, reply to existing comments, or add inline comments on specific lines of code:
 
 ```typescript
 // General comment
@@ -262,8 +281,19 @@ Add general comments or inline comments on specific lines of code:
     "workspace": "PROJ",
     "repository": "my-repo",
     "pull_request_id": 123,
-    "comment_text": "Great work! Just one small suggestion...",
-    "parent_comment_id": 456  // Optional - for replies
+    "comment_text": "Great work! Just one small suggestion..."
+  }
+}
+
+// Reply to an existing comment
+{
+  "tool": "add_comment",
+  "arguments": {
+    "workspace": "PROJ",
+    "repository": "my-repo",
+    "pull_request_id": 123,
+    "comment_text": "Thanks for the feedback! I've updated the code.",
+    "parent_comment_id": 456  // ID of the comment you're replying to
   }
 }
 
@@ -282,6 +312,13 @@ Add general comments or inline comments on specific lines of code:
 }
 ```
 
+**Note on comment replies:**
+- Use `parent_comment_id` to reply to any comment (general or inline)
+- In `get_pull_request` responses:
+  - Bitbucket Server shows replies nested in a `replies` array
+  - Bitbucket Cloud shows a `parent_id` field for reply comments
+- You can reply to replies, creating nested conversations
+
 **Note on inline comments:**
 - `file_path`: The path to the file as shown in the diff
 - `line_number`: The line number as shown in the diff
diff --git a/package.json b/package.json
index a1df7a6..27d35b4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nexus2520/bitbucket-mcp-server",
-  "version": "0.5.0",
+  "version": "0.6.1",
   "description": "MCP server for Bitbucket API integration - supports both Cloud and Server",
   "type": "module",
   "main": "./build/index.js",
diff --git a/src/handlers/pull-request-handlers.ts b/src/handlers/pull-request-handlers.ts
index daf5334..9682fa4 100644
--- a/src/handlers/pull-request-handlers.ts
+++ b/src/handlers/pull-request-handlers.ts
@@ -5,7 +5,11 @@ import {
   BitbucketServerPullRequest, 
   BitbucketCloudPullRequest, 
   BitbucketServerActivity,
-  MergeInfo 
+  MergeInfo,
+  BitbucketCloudComment,
+  BitbucketCloudFileChange,
+  FormattedComment,
+  FormattedFileChange
 } from '../types/bitbucket.js';
 import {
   isGetPullRequestArgs,
@@ -78,16 +82,49 @@ export class PullRequestHandlers {
         }
       }
 
+      // Fetch comments and file changes in parallel
+      let comments: FormattedComment[] = [];
+      let activeCommentCount = 0;
+      let totalCommentCount = 0;
+      let fileChanges: FormattedFileChange[] = [];
+      let fileChangesSummary: any = null;
+
+      try {
+        const [commentsResult, fileChangesResult] = await Promise.all([
+          this.fetchPullRequestComments(workspace, repository, pull_request_id),
+          this.fetchPullRequestFileChanges(workspace, repository, pull_request_id)
+        ]);
+
+        comments = commentsResult.comments;
+        activeCommentCount = commentsResult.activeCount;
+        totalCommentCount = commentsResult.totalCount;
+        fileChanges = fileChangesResult.fileChanges;
+        fileChangesSummary = fileChangesResult.summary;
+      } catch (error) {
+        // Log error but continue with PR data
+        console.error('Failed to fetch additional PR data:', error);
+      }
+
       // Format the response based on server type
       const formattedResponse = this.apiClient.getIsServer() 
         ? formatServerResponse(pr as BitbucketServerPullRequest, mergeInfo, this.baseUrl)
         : formatCloudResponse(pr as BitbucketCloudPullRequest);
 
+      // Add comments and file changes to the response
+      const enhancedResponse = {
+        ...formattedResponse,
+        active_comments: comments,
+        active_comment_count: activeCommentCount,
+        total_comment_count: totalCommentCount,
+        file_changes: fileChanges,
+        file_changes_summary: fileChangesSummary
+      };
+
       return {
         content: [
           {
             type: 'text',
-            text: JSON.stringify(formattedResponse, null, 2),
+            text: JSON.stringify(enhancedResponse, null, 2),
           },
         ],
       };
@@ -483,4 +520,213 @@ export class PullRequestHandlers {
       return this.apiClient.handleApiError(error, `merging pull request ${pull_request_id} in ${workspace}/${repository}`);
     }
   }
+
+  private async fetchPullRequestComments(
+    workspace: string,
+    repository: string,
+    pullRequestId: number
+  ): Promise<{ comments: FormattedComment[]; activeCount: number; totalCount: number }> {
+    try {
+      let comments: FormattedComment[] = [];
+      let activeCount = 0;
+      let totalCount = 0;
+
+      if (this.apiClient.getIsServer()) {
+        // Helper function to process nested comments recursively
+        const processNestedComments = (comment: any, anchor: any): FormattedComment => {
+          const formattedComment: FormattedComment = {
+            id: comment.id,
+            author: comment.author.displayName,
+            text: comment.text,
+            created_on: new Date(comment.createdDate).toISOString(),
+            is_inline: !!anchor,
+            file_path: anchor?.path,
+            line_number: anchor?.line,
+            state: comment.state
+          };
+
+          // Process nested replies
+          if (comment.comments && comment.comments.length > 0) {
+            formattedComment.replies = comment.comments
+              .filter((reply: any) => {
+                // Apply same filters to replies
+                if (reply.state === 'RESOLVED') return false;
+                if (anchor && anchor.orphaned === true) return false;
+                return true;
+              })
+              .map((reply: any) => processNestedComments(reply, anchor));
+          }
+
+          return formattedComment;
+        };
+
+        // Helper to count all comments including nested ones
+        const countAllComments = (comment: any): number => {
+          let count = 1;
+          if (comment.comments && comment.comments.length > 0) {
+            count += comment.comments.reduce((sum: number, reply: any) => sum + countAllComments(reply), 0);
+          }
+          return count;
+        };
+
+        // Helper to count active comments including nested ones
+        const countActiveComments = (comment: any, anchor: any): number => {
+          let count = 0;
+          
+          // Check if this comment is active
+          if (comment.state !== 'RESOLVED' && (!anchor || anchor.orphaned !== true)) {
+            count = 1;
+          }
+          
+          // Count active nested comments
+          if (comment.comments && comment.comments.length > 0) {
+            count += comment.comments.reduce((sum: number, reply: any) => sum + countActiveComments(reply, anchor), 0);
+          }
+          
+          return count;
+        };
+
+        // Bitbucket Server API - fetch from activities
+        const apiPath = `/rest/api/1.0/projects/${workspace}/repos/${repository}/pull-requests/${pullRequestId}/activities`;
+        const response = await this.apiClient.makeRequest<any>('get', apiPath, undefined, {
+          params: { limit: 1000 }
+        });
+
+        const activities = response.values || [];
+        
+        // Filter for comment activities
+        const commentActivities = activities.filter((a: any) => 
+          a.action === 'COMMENTED' && a.comment
+        );
+
+        // Count all comments including nested ones
+        totalCount = commentActivities.reduce((sum: number, activity: any) => {
+          return sum + countAllComments(activity.comment);
+        }, 0);
+
+        // Count active comments including nested ones
+        activeCount = commentActivities.reduce((sum: number, activity: any) => {
+          return sum + countActiveComments(activity.comment, activity.commentAnchor);
+        }, 0);
+
+        // Process top-level comments and their nested replies
+        const processedComments = commentActivities
+          .filter((a: any) => {
+            const c = a.comment;
+            const anchor = a.commentAnchor;
+            
+            // Skip resolved comments
+            if (c.state === 'RESOLVED') return false;
+            
+            // Skip orphaned inline comments
+            if (anchor && anchor.orphaned === true) return false;
+            
+            return true;
+          })
+          .map((a: any) => processNestedComments(a.comment, a.commentAnchor));
+
+        // Limit to 20 top-level comments
+        comments = processedComments.slice(0, 20);
+      } else {
+        // Bitbucket Cloud API
+        const apiPath = `/repositories/${workspace}/${repository}/pullrequests/${pullRequestId}/comments`;
+        const response = await this.apiClient.makeRequest<any>('get', apiPath, undefined, {
+          params: { pagelen: 100 }
+        });
+
+        const allComments = response.values || [];
+        totalCount = allComments.length;
+
+        // Filter for active comments (not deleted or resolved) and limit to 20
+        const activeComments = allComments
+          .filter((c: BitbucketCloudComment) => !c.deleted && !c.resolved)
+          .slice(0, 20);
+
+        activeCount = allComments.filter((c: BitbucketCloudComment) => !c.deleted && !c.resolved).length;
+
+        comments = activeComments.map((c: BitbucketCloudComment) => ({
+          id: c.id,
+          author: c.user.display_name,
+          text: c.content.raw,
+          created_on: c.created_on,
+          is_inline: !!c.inline,
+          file_path: c.inline?.path,
+          line_number: c.inline?.to
+        }));
+      }
+
+      return { comments, activeCount, totalCount };
+    } catch (error) {
+      console.error('Failed to fetch comments:', error);
+      return { comments: [], activeCount: 0, totalCount: 0 };
+    }
+  }
+
+  private async fetchPullRequestFileChanges(
+    workspace: string,
+    repository: string,
+    pullRequestId: number
+  ): Promise<{ fileChanges: FormattedFileChange[]; summary: any }> {
+    try {
+      let fileChanges: FormattedFileChange[] = [];
+      let totalLinesAdded = 0;
+      let totalLinesRemoved = 0;
+
+      if (this.apiClient.getIsServer()) {
+        // Bitbucket Server API - use changes endpoint
+        const apiPath = `/rest/api/1.0/projects/${workspace}/repos/${repository}/pull-requests/${pullRequestId}/changes`;
+        const response = await this.apiClient.makeRequest<any>('get', apiPath, undefined, {
+          params: { limit: 1000 }
+        });
+
+        const changes = response.values || [];
+
+        fileChanges = changes.map((change: any) => {
+          let status: 'added' | 'modified' | 'removed' | 'renamed' = 'modified';
+          if (change.type === 'ADD') status = 'added';
+          else if (change.type === 'DELETE') status = 'removed';
+          else if (change.type === 'MOVE' || change.type === 'RENAME') status = 'renamed';
+
+          return {
+            path: change.path.toString,
+            status,
+            old_path: change.srcPath?.toString
+          };
+        });
+      } else {
+        // Bitbucket Cloud API - use diffstat endpoint (has line statistics)
+        const apiPath = `/repositories/${workspace}/${repository}/pullrequests/${pullRequestId}/diffstat`;
+        const response = await this.apiClient.makeRequest<any>('get', apiPath, undefined, {
+          params: { pagelen: 100 }
+        });
+
+        const diffstats = response.values || [];
+
+        fileChanges = diffstats.map((stat: BitbucketCloudFileChange) => {
+          totalLinesAdded += stat.lines_added;
+          totalLinesRemoved += stat.lines_removed;
+
+          return {
+            path: stat.path,
+            status: stat.type,
+            old_path: stat.old?.path
+          };
+        });
+      }
+
+      const summary = {
+        total_files: fileChanges.length
+      };
+
+      return { fileChanges, summary };
+    } catch (error) {
+      console.error('Failed to fetch file changes:', error);
+      return {
+        fileChanges: [],
+        summary: {
+          total_files: 0
+        }
+      };
+    }
+  }
 }
diff --git a/src/index.ts b/src/index.ts
index 47d163c..ca997bc 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -40,7 +40,7 @@ class BitbucketMCPServer {
     this.server = new Server(
       {
         name: 'bitbucket-mcp-server',
-        version: '0.5.0',
+        version: '0.6.1',
       },
       {
         capabilities: {
diff --git a/src/types/bitbucket.ts b/src/types/bitbucket.ts
index 72ae20c..183655d 100644
--- a/src/types/bitbucket.ts
+++ b/src/types/bitbucket.ts
@@ -262,3 +262,93 @@ export interface MergeInfo {
   mergedAt?: string;
   mergeCommitMessage?: string;
 }
+
+// Comment types
+export interface BitbucketServerComment {
+  id: number;
+  version: number;
+  text: string;
+  author: {
+    name: string;
+    emailAddress: string;
+    displayName: string;
+  };
+  createdDate: number;
+  updatedDate: number;
+  state?: 'OPEN' | 'RESOLVED';
+  anchor?: {
+    line: number;
+    lineType: string;
+    fileType: string;
+    path: string;
+  };
+}
+
+export interface BitbucketCloudComment {
+  id: number;
+  content: {
+    raw: string;
+    markup: string;
+    html: string;
+  };
+  user: {
+    display_name: string;
+    account_id: string;
+  };
+  created_on: string;
+  updated_on: string;
+  deleted?: boolean;
+  resolved?: boolean;
+  inline?: {
+    to: number;
+    from?: number;
+    path: string;
+  };
+}
+
+// File change types
+export interface BitbucketServerFileChange {
+  path: {
+    toString: string;
+  };
+  executable: boolean;
+  percentUnchanged: number;
+  type: string;
+  nodeType: string;
+  srcPath?: {
+    toString: string;
+  };
+  linesAdded?: number;
+  linesRemoved?: number;
+}
+
+export interface BitbucketCloudFileChange {
+  path: string;
+  type: 'added' | 'modified' | 'removed' | 'renamed';
+  lines_added: number;
+  lines_removed: number;
+  old?: {
+    path: string;
+  };
+}
+
+// Formatted comment type for response
+export interface FormattedComment {
+  id: number;
+  author: string;
+  text: string;
+  created_on: string;
+  is_inline: boolean;
+  file_path?: string;
+  line_number?: number;
+  state?: 'OPEN' | 'RESOLVED';
+  parent_id?: number;  // For Bitbucket Cloud style replies
+  replies?: FormattedComment[];  // For Bitbucket Server nested replies
+}
+
+// Formatted file change type for response
+export interface FormattedFileChange {
+  path: string;
+  status: 'added' | 'modified' | 'removed' | 'renamed';
+  old_path?: string;
+}