diff --git a/.claude/skills/add-voice-transcription/modify/src/channels/whatsapp.ts b/.claude/skills/add-voice-transcription/modify/src/channels/whatsapp.ts
index 0781185..025e905 100644
--- a/.claude/skills/add-voice-transcription/modify/src/channels/whatsapp.ts
+++ b/.claude/skills/add-voice-transcription/modify/src/channels/whatsapp.ts
@@ -20,6 +20,7 @@ import {
 import { logger } from '../logger.js';
 import { isVoiceMessage, transcribeAudioMessage } from '../transcription.js';
 import { Channel, OnInboundMessage, OnChatMetadata, RegisteredGroup } from '../types.js';
+import { registerChannel, ChannelOpts } from './registry.js';
 
 const GROUP_SYNC_INTERVAL_MS = 24 * 60 * 60 * 1000; // 24 hours
 
@@ -354,3 +355,12 @@ export class WhatsAppChannel implements Channel {
     }
   }
 }
+
+registerChannel('whatsapp', (opts: ChannelOpts) => {
+  const authDir = path.join(STORE_DIR, 'auth');
+  if (!fs.existsSync(path.join(authDir, 'creds.json'))) {
+    logger.warn('WhatsApp: credentials not found. Run /add-whatsapp to authenticate.');
+    return null;
+  }
+  return new WhatsAppChannel(opts);
+});