diff --git a/src/__tests__/config.test.ts b/src/__tests__/config.test.ts
index b7bf32e..c9a4dc7 100644
--- a/src/__tests__/config.test.ts
+++ b/src/__tests__/config.test.ts
@@ -89,6 +89,64 @@ describe('config command', () => {
     expect(webhookPrompt.validate('not-a-webhook')).toBe('Must be a valid Discord webhook URL (including ID and Token)');
   });
 
+  it('should detect existing config and prompt for reconfiguration — cancel keeps current config', async () => {
+    vi.mocked(configUtils.getConfig).mockReturnValue({ notification_service: 'discord' });
+    vi.mocked(tui.select).mockResolvedValueOnce('no'); // decline reconfiguration
+
+    await program.parseAsync(['node', 'test', 'config', 'setup']);
+
+    expect(consoleLogSpy).toHaveBeenCalledWith(expect.stringContaining('Current notification service is set to'));
+    expect(tui.select).toHaveBeenCalledTimes(1); // only reconfiguration prompt
+    expect(configUtils.setConfig).not.toHaveBeenCalled();
+  });
+
+  it('should proceed with setup when user confirms reconfiguration', async () => {
+    vi.mocked(configUtils.getConfig).mockReturnValue({ notification_service: 'discord' });
+    vi.mocked(tui.select)
+      .mockResolvedValueOnce('yes') // confirm reconfiguration
+      .mockResolvedValueOnce('discord'); // select discord service
+    vi.mocked(tui.input).mockResolvedValue('https://discord.com/api/webhooks/123456789/token-here');
+
+    await program.parseAsync(['node', 'test', 'config', 'setup']);
+
+    expect(tui.select).toHaveBeenCalledTimes(2); // reconfiguration + service selection
+    expect(configUtils.setConfig).toHaveBeenCalledWith('notification_service', 'discord');
+    expect(configUtils.setConfig).toHaveBeenCalledWith('discord_webhook', 'https://discord.com/api/webhooks/123456789/token-here');
+  });
+
+  it('should skip reconfiguration prompt when no existing config', async () => {
+    vi.mocked(configUtils.getConfig).mockReturnValue({});
+    vi.mocked(tui.select).mockResolvedValue('none');
+
+    await program.parseAsync(['node', 'test', 'config', 'setup']);
+
+    expect(consoleLogSpy).not.toHaveBeenCalledWith(
+      expect.stringContaining('Current notification service is set to'),
+    );
+    expect(tui.select).toHaveBeenCalledTimes(1); // only service selection
+    expect(configUtils.setConfig).toHaveBeenCalledWith('notification_service', 'none');
+  });
+
+  it('should handle select rejection gracefully during setup', async () => {
+    vi.mocked(tui.select).mockRejectedValueOnce(new Error('select failed'));
+
+    await program.parseAsync(['node', 'test', 'config', 'setup']);
+
+    expect(consoleErrorSpy).toHaveBeenCalledWith(expect.stringContaining('select failed'));
+    expect(configUtils.setConfig).not.toHaveBeenCalled();
+  });
+
+  it('should handle setConfig failure gracefully during setup', async () => {
+    vi.mocked(tui.select).mockResolvedValue('discord');
+    vi.mocked(tui.input).mockResolvedValue('https://discord.com/api/webhooks/123456789/token-here');
+    // Use mockImplementationOnce to avoid polluting subsequent tests
+    vi.mocked(configUtils.setConfig).mockImplementationOnce(() => { throw new Error('write failed'); });
+
+    await program.parseAsync(['node', 'test', 'config', 'setup']);
+
+    expect(consoleErrorSpy).toHaveBeenCalledWith(expect.stringContaining('write failed'));
+  });
+
   it('should call select, multiple inputs and setConfig on email setup without password', async () => {
     vi.mocked(tui.select).mockResolvedValue('email');
     vi.mocked(tui.input)
@@ -152,6 +210,32 @@ describe('config command', () => {
     expect(consoleLogSpy).toHaveBeenCalledWith(expect.stringContaining('Set alert_email to test@test.com'));
   });
 
+  it('should show deprecation warning when setting credential key via config set', async () => {
+    await program.parseAsync(['node', 'test', 'config', 'set', 'discord_webhook', 'https://discord.com/api/webhooks/test']);
+    expect(consoleLogSpy).toHaveBeenCalledWith(expect.stringContaining('Deprecation warning'));
+    expect(consoleLogSpy).toHaveBeenCalledWith(expect.stringContaining('kdm config setup'));
+    expect(configUtils.setConfig).toHaveBeenCalled(); // still executes (soft deprecation)
+  });
+
+  it('should show deprecation warning for all credential keys', async () => {
+    const credentialKeys = ['notification_service', 'discord_webhook', 'email_host', 'email_port', 'email_user', 'email_to'];
+    for (const key of credentialKeys) {
+      vi.clearAllMocks();
+      // email_port gets parsed to int by the existing handler logic
+      const testValue = key === 'email_port' ? '587' : 'test-value';
+      const expectedValue = key === 'email_port' ? 587 : testValue;
+      await program.parseAsync(['node', 'test', 'config', 'set', key, testValue]);
+      expect(consoleLogSpy).toHaveBeenCalledWith(expect.stringContaining('Deprecation warning'));
+      expect(configUtils.setConfig).toHaveBeenCalledWith(key, expectedValue);
+    }
+  });
+
+  it('should not show deprecation warning for non-credential keys', async () => {
+    await program.parseAsync(['node', 'test', 'config', 'set', 'alert_cooldown', '300']);
+    expect(consoleLogSpy).not.toHaveBeenCalledWith(expect.stringContaining('Deprecation warning'));
+    expect(configUtils.setConfig).toHaveBeenCalledWith('alert_cooldown', 300);
+  });
+
   it('should parse integer for alert_cooldown', async () => {
     await program.parseAsync(['node', 'test', 'config', 'set', 'alert_cooldown', '123']);
     expect(configUtils.setConfig).toHaveBeenCalledWith('alert_cooldown', 123);
diff --git a/src/commands/config.ts b/src/commands/config.ts
index 1d42758..2d6d0e1 100644
--- a/src/commands/config.ts
+++ b/src/commands/config.ts
@@ -3,6 +3,31 @@ import chalk from 'chalk';
 import { setConfig, getConfig, clearConfig, clearNotificationCredentials } from '../utils/config';
 import { select, input } from '@vr_patel/tui';
 
+const promptReconfigurationIfNeeded = async (): Promise<boolean> => {
+  const currentConfig = getConfig();
+  if (currentConfig.notification_service && currentConfig.notification_service !== 'none') {
+    const serviceLabel =
+      currentConfig.notification_service === 'discord' ? 'Discord' : 'Email (SMTP)';
+    console.log(
+      chalk.yellow(`\n⚠ Current notification service is set to: ${chalk.bold(serviceLabel)}`)
+    );
+
+    const shouldReconfigure = await select({
+      message: 'Would you like to reconfigure?',
+      options: [
+        { label: 'Yes', value: 'yes' },
+        { label: 'No', value: 'no' },
+      ],
+    });
+
+    if (shouldReconfigure === 'no') {
+      console.log(chalk.dim('Setup cancelled. Current configuration unchanged.'));
+      return false;
+    }
+  }
+  return true;
+};
+
 export const registerConfigCommand = (program: Command) => {
   const config = program
     .command('config')
@@ -13,6 +38,10 @@ export const registerConfigCommand = (program: Command) => {
     .description('Interactively set up notification service')
     .action(async () => {
       try {
+        // Check for existing configuration
+        const shouldProceed = await promptReconfigurationIfNeeded();
+        if (!shouldProceed) return;
+
         const choice = await select({
           message: 'Select notification service:',
           options: [
@@ -39,7 +68,7 @@ export const registerConfigCommand = (program: Command) => {
               return discordWebhookRegex.test(v) || 'Must be a valid Discord webhook URL (including ID and Token)';
             },
           });
-          
+
           clearNotificationCredentials();
           setConfig('discord_webhook', webhook);
           setConfig('notification_service', 'discord');
@@ -82,13 +111,13 @@ export const registerConfigCommand = (program: Command) => {
             setConfig('email_password', password);
           }
           setConfig('notification_service', 'email');
-          
+
           console.log(chalk.green('\n✓ Email SMTP configured.'));
         }
 
-        console.log(chalk.green(`✓ Notification service set to: ${chalk.bold(choice.toUpperCase())}`));
+        console.log(chalk.green(`\n✓ Notification service set to: ${chalk.bold(choice.toUpperCase())}`));
       } catch (error) {
-        console.error(chalk.red(`✗ Set up cancelled or failed: ${(error as Error).message}`));
+        console.error(chalk.red(`\n✗ Set up cancelled or failed: ${(error as Error).message}`));
       }
     });
 
@@ -97,12 +126,26 @@ export const registerConfigCommand = (program: Command) => {
     .description('Set a configuration value')
     .action((key, value) => {
       try {
+        // Credential keys that should be configured via the interactive setup
+        const credentialKeys = ['notification_service', 'discord_webhook', 'email_host', 'email_port', 'email_user', 'email_to'];
+        const credentialKeyPattern = new RegExp(`^(${credentialKeys.join('|')})$`);
+
+        if (credentialKeyPattern.test(key)) {
+          console.log(chalk.yellow(`\n⚠ Deprecation warning: Setting "${key}" via "kdm config set" is deprecated.`));
+          console.log(chalk.yellow(`  Use ${chalk.bold('kdm config setup')} for guided configuration.\n`));
+        }
+
         // Convert value to number if key is alert_cooldown or email_port
         let finalValue = value;
+        let finalValue = value;
         if (key === 'alert_cooldown' || key === 'email_port') {
-          finalValue = parseInt(value, 10);
+          const parsed = Number.parseInt(value, 10);
+          if (Number.isNaN(parsed)) {
+            throw new Error(`Invalid numeric value for "${key}"`);
+          }
+          finalValue = parsed;
         }
-        
+
         setConfig(key as any, finalValue);
         console.log(chalk.green(`✓ Set ${key} to ${finalValue}`));
       } catch (error) {
@@ -117,15 +160,15 @@ export const registerConfigCommand = (program: Command) => {
       const current = getConfig();
       console.log(chalk.bold('\nCurrent KDM Configuration:'));
       console.log(chalk.gray('──────────────────────────────────────────────────'));
-      
+
       if (Object.keys(current).length === 0) {
         console.log(chalk.yellow(' No configuration found. Use "kdm config set <key> <value>"'));
       } else {
         Object.entries(current).forEach(([key, value]) => {
-          console.log(` ${chalk.cyan(key.padEnd(20))} : ${chalk.white(value)}`);
+          console.log(`${chalk.cyan(key.padEnd(20))} : ${chalk.white(value)}`);
         });
       }
-      
+
       console.log(chalk.gray('──────────────────────────────────────────────────'));
       console.log(chalk.dim('\n Note: SMTP password can be set either in config or via the KDM_SMTP_PASSWORD environment variable, which takes precedence if both are set.\n'));
     });
diff --git a/src/ui/banner.ts b/src/ui/banner.ts
index 22c8ac6..3e999cc 100644
--- a/src/ui/banner.ts
+++ b/src/ui/banner.ts
@@ -10,13 +10,11 @@ export const showWelcomeBanner = (version: string) => {
   ${chalk.cyan('╚═╝  ╚═╝╚═════╝ ╚═╝     ╚═╝')}
   `;
 
-  const signature = chalk.gray(`
-  ──────────────────────────────────────────────────
-         ${chalk.white.bold('devloped by')} ${chalk.yellow.bold('utkarshpatrikar')}
-  ──────────────────────────────────────────────────
-  `);
+  const signature = chalk.gray(
+    '──────────────────────────────────────────────────'
+  );
   
   console.log(banner);
   console.log(signature);
-  console.log(chalk.blue.bold(`  Kubernetes & Docker Monitor v${version}\n`));
+  console.log(chalk.blue.bold(`  Kubernetes & Docker Monitor v${version}`));
 };