diff --git a/CHANGELOG.md b/CHANGELOG.md
index 241527d..b73fa3b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ 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).
 
-## [1.0.0-beta.3] - YYYY-MM-DD
+## [1.0.0-beta.3] - 2025-01-21
 
 ### Added
 - Enhanced `image` tool to support optional immediate analysis of the captured screenshot by providing a `question` and `provider_config`.
@@ -24,12 +24,26 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Initial E2E tests for CLI image capture. 
 
-## [1.0.0-beta.4] - YYYY-MM-DD
+## [1.0.0-beta.4] - 2025-01-25
 
 ### ✨ Added
+- Comprehensive Swift unit tests for all CLI components
+- Release preparation script with extensive validation checks
+- Swift code linting and formatting with SwiftLint and SwiftFormat
+- Enhanced image tool with blur detection, custom formats (PNG/JPG), and naming patterns
+- Robust error handling for Swift CLI integration
 
-- **Swift CLI `image` command:** Added `--screen-index <Int>` option to capture a specific display when `--mode screen` is used. (Part of `image` tool simplification)
-- **MCP `image` tool:** Now fully supports `app_target: "screen:INDEX"` by utilizing the Swift CLI's new `--screen-index` capability.
+### 🐛 Fixed
+- Swift CLI integration tests now properly handle error output
+- Fixed Swift code to comply with SwiftLint rules
+- Corrected JSON structure expectations in tests
+
+### 📚 Changed
+- Updated all dependencies to latest versions
+- Improved test coverage for both TypeScript and Swift code
+- Enhanced release process with automated checks
+- Swift CLI `image` command: Added `--screen-index <Int>` option to capture a specific display when `--mode screen` is used
+- MCP `image` tool: Now fully supports `app_target: "screen:INDEX"` by utilizing the Swift CLI's new `--screen-index` capability
 
 ### ♻️ Changed
 
diff --git a/examples/test-peekaboo.js b/examples/test-peekaboo.js
new file mode 100755
index 0000000..8f8f37f
--- /dev/null
+++ b/examples/test-peekaboo.js
@@ -0,0 +1,118 @@
+#!/usr/bin/env node
+
+/**
+ * Simple test script to verify Peekaboo MCP is working correctly
+ * Run this after installing the package to test basic functionality
+ */
+
+import { spawn } from 'child_process';
+
+console.log('🧪 Testing Peekaboo MCP Server...\n');
+
+// Test 1: List available tools
+console.log('📋 Test 1: Listing available tools...');
+const listToolsRequest = {
+  jsonrpc: "2.0",
+  id: 1,
+  method: "tools/list"
+};
+
+// Test 2: List running applications
+console.log('📱 Test 2: Listing running applications...');
+const listAppsRequest = {
+  jsonrpc: "2.0",
+  id: 2,
+  method: "tools/call",
+  params: {
+    name: "list",
+    arguments: {
+      target: "apps"
+    }
+  }
+};
+
+// Test 3: Capture screen
+console.log('📸 Test 3: Capturing screen...');
+const captureScreenRequest = {
+  jsonrpc: "2.0",
+  id: 3,
+  method: "tools/call",
+  params: {
+    name: "image",
+    arguments: {
+      app_target: "screen",
+      format: "data"
+    }
+  }
+};
+
+// Start the server
+const server = spawn('node', ['dist/index.js'], {
+  stdio: ['pipe', 'pipe', 'pipe']
+});
+
+let responses = [];
+let currentTest = 1;
+
+server.stdout.on('data', (data) => {
+  const lines = data.toString().split('\n').filter(line => line.trim());
+  
+  for (const line of lines) {
+    try {
+      const response = JSON.parse(line);
+      responses.push(response);
+      
+      if (response.id === 1) {
+        console.log('✅ Tools available:', response.result.tools.map(t => t.name).join(', '));
+        
+        // Send next test
+        server.stdin.write(JSON.stringify(listAppsRequest) + '\n');
+      } else if (response.id === 2) {
+        const apps = response.result[0]?.content[0]?.text;
+        if (apps) {
+          const appData = JSON.parse(apps);
+          console.log(`✅ Found ${appData.applications.length} running applications`);
+        }
+        
+        // Send next test
+        server.stdin.write(JSON.stringify(captureScreenRequest) + '\n');
+      } else if (response.id === 3) {
+        if (response.result && response.result[0]) {
+          console.log('✅ Screen captured successfully');
+          console.log('\n🎉 All tests passed!');
+        } else if (response.error) {
+          console.log('❌ Screen capture failed:', response.error.message);
+        }
+        
+        // Exit
+        server.kill();
+        process.exit(0);
+      }
+    } catch (e) {
+      // Ignore non-JSON lines
+    }
+  }
+});
+
+server.stderr.on('data', (data) => {
+  console.error('Server error:', data.toString());
+});
+
+server.on('close', (code) => {
+  if (code !== 0) {
+    console.error(`\n❌ Server exited with code ${code}`);
+    process.exit(1);
+  }
+});
+
+// Send first test
+setTimeout(() => {
+  server.stdin.write(JSON.stringify(listToolsRequest) + '\n');
+}, 100);
+
+// Timeout after 10 seconds
+setTimeout(() => {
+  console.error('\n❌ Test timed out');
+  server.kill();
+  process.exit(1);
+}, 10000);
\ No newline at end of file