fix(whatsapp): prevent service restart hammering on auth failure

.claude/skills/add-whatsapp/add/src/channels/whatsapp.ts

@@ -110,15 +110,7 @@ export class WhatsAppChannel implements Channel {
         );
 
         if (shouldReconnect) {
-          logger.info('Reconnecting...');
-          this.connectInternal().catch((err) => {
-            logger.error({ err }, 'Failed to reconnect, retrying in 5s');
-            setTimeout(() => {
-              this.connectInternal().catch((err2) => {
-                logger.error({ err: err2 }, 'Reconnection retry failed');
-              });
-            }, 5000);
-          });
+          this.scheduleReconnect(1);
         } else {
           logger.info('Logged out. Run /setup to re-authenticate.');
           process.exit(0);
@@ -339,6 +331,17 @@ export class WhatsAppChannel implements Channel {
     }
   }
 
+  private scheduleReconnect(attempt: number): void {
+    const delayMs = Math.min(5000 * Math.pow(2, attempt - 1), 300000);
+    logger.info({ attempt, delayMs }, 'Reconnecting...');
+    setTimeout(() => {
+      this.connectInternal().catch((err) => {
+        logger.error({ err, attempt }, 'Reconnection attempt failed');
+        this.scheduleReconnect(attempt + 1);
+      });
+    }, delayMs);
+  }
+
   private async translateJid(jid: string): Promise<string> {
     if (!jid.endsWith('@lid')) return jid;
     const lidUser = jid.split('@')[0].split(':')[0];

.claude/skills/add-whatsapp/manifest.yaml

@@ -10,6 +10,7 @@ adds:
 modifies:
   - src/channels/index.ts
   - setup/index.ts
+  - setup/service.ts
 structured:
   npm_dependencies:
     "@whiskeysockets/baileys": "^7.0.0-rc.9"