Hot config update + systemd template

- Router handles config.updated WS event (model, provider, prompt)
- picogent@.service template: systemctl start picogent@coder

picogent@.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Picogent Agent %i
+After=network.target
+Wants=network.target
+
+[Service]
+Type=simple
+WorkingDirectory=/root/projects/team-board/picogent
+ExecStart=/usr/bin/node dist/index.js /root/projects/team-board/agents/%i/
+Restart=always
+RestartSec=5
+Environment=NODE_ENV=production
+
+[Install]
+WantedBy=multi-user.target

src/router.ts

@@ -50,6 +50,29 @@ export class EventRouter {
     this.log.info({ mappings: this.chatToProject.size }, 'Project mappings set');
   }
 
+  /** Handle hot config update from Tracker */
+  private handleConfigUpdated(data: Record<string, unknown>): void {
+    this.log.info('━━━ CONFIG UPDATED ━━━');
+    if (data.model && typeof data.model === 'string') {
+      this.config.model = data.model;
+      this.log.info('  Model → %s', data.model);
+    }
+    if (data.provider && typeof data.provider === 'string') {
+      this.config.provider = data.provider;
+      this.log.info('  Provider → %s', data.provider);
+    }
+    if (data.prompt !== undefined) {
+      this.config.prompt = (data.prompt as string) || '';
+      this.log.info('  Prompt updated (%d chars)', this.config.prompt.length);
+    }
+    if (data.chat_listen && typeof data.chat_listen === 'string') {
+      this.log.info('  chat_listen → %s (requires reconnect for WS filter)', data.chat_listen);
+    }
+    if (data.task_listen && typeof data.task_listen === 'string') {
+      this.log.info('  task_listen → %s (requires reconnect for WS filter)', data.task_listen);
+    }
+  }
+
   private resolveProjectId(chatId?: string): string | undefined {
     if (chatId) return this.chatToProject.get(chatId);
     return undefined;
@@ -63,6 +86,9 @@ export class EventRouter {
       case 'chat.message':
         await this.handleMessageNew(event.data);
         break;
+      case 'config.updated':
+        this.handleConfigUpdated(event.data);
+        break;
       case 'task.assigned':
       case 'task.created':
       case 'task.updated':