diff --git a/src/server.ts b/src/server.ts
index d62d236..31488b0 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -7,6 +7,7 @@ import { TaskService } from './tasks/service';
 import { WebhookManager } from './services/webhook-manager';
 import { normalizeWhatsAppId } from './utils/whatsapp';
 import { ensureUserExists, db, initializeDatabase } from './db';
+import { ContactsService } from './services/contacts';
 
 // Bun is available globally when running under Bun runtime
 declare global {
@@ -95,6 +96,13 @@ export class WebhookServer {
 					}
 					await WebhookServer.handleMessageUpsert(payload.data);
 					break;
+				case 'contacts.update':
+				case 'chats.update':
+					if (process.env.NODE_ENV !== 'test') {
+						console.log('ℹ️ Handling contacts/chats update event:', { rawEvent: evt });
+					}
+					ContactsService.updateFromWebhook(payload.data);
+					break;
 				// Other events will be added later
 			}
 
diff --git a/src/services/command.ts b/src/services/command.ts
index f610fb5..87adc72 100644
--- a/src/services/command.ts
+++ b/src/services/command.ts
@@ -3,6 +3,7 @@ import { db, ensureUserExists } from '../db';
 import { normalizeWhatsAppId } from '../utils/whatsapp';
 import { TaskService } from '../tasks/service';
 import { GroupSyncService } from './group-sync';
+import { ContactsService } from './contacts';
 
 type CommandContext = {
   sender: string;     // normalized user id (digits only), but accept raw too
@@ -152,7 +153,13 @@ export class CommandService {
 
     const mentionsForSending = assignmentUserIds.map(uid => `${uid}@s.whatsapp.net`);
 
-    const assignedList = assignmentUserIds.map(uid => `@${uid}`).join(' ');
+    const assignedLabels = await Promise.all(
+      assignmentUserIds.map(async uid => {
+        const name = await ContactsService.getDisplayName(uid);
+        return `@${name || uid}`;
+      })
+    );
+    const assignedList = assignedLabels.join(' ');
     const resp =
       `✅ Tarea ${taskId} creada: "${description || '(sin descripción)'}"` +
       (dueDate ? ` (vence ${dueDate})` : '') +
diff --git a/src/services/contacts.ts b/src/services/contacts.ts
new file mode 100644
index 0000000..abfe374
--- /dev/null
+++ b/src/services/contacts.ts
@@ -0,0 +1,158 @@
+import { normalizeWhatsAppId, isUserJid } from '../utils/whatsapp';
+
+type CacheEntry = {
+  name: string;
+  expiresAt: number;
+};
+
+export class ContactsService {
+  // Caché en memoria: userId(normalizado, solo dígitos) -> nombre
+  private static readonly cache = new Map<string, CacheEntry>();
+  private static readonly TTL_MS = 12 * 60 * 60 * 1000; // 12h
+
+  private static getHeaders(): HeadersInit {
+    return {
+      apikey: process.env.EVOLUTION_API_KEY || '',
+      'Content-Type': 'application/json',
+    };
+  }
+
+  private static now() {
+    return Date.now();
+  }
+
+  private static extractName(obj: any): string | null {
+    if (!obj || typeof obj !== 'object') return null;
+    // Intentar múltiples campos posibles que suelen aparecer en catálogos/contactos
+    const candidates = [
+      obj.name,
+      obj.pushname,
+      obj.verifiedName,
+      obj.notify,
+      obj.shortName,
+      obj.displayName,
+      obj.formattedName,
+      obj.subject, // a veces para grupos; pero evitaremos grupos abajo
+      obj.contactName
+    ].filter(Boolean) as string[];
+    const name = candidates.find(v => typeof v === 'string' && v.trim().length > 0);
+    return name ? name.trim() : null;
+  }
+
+  static updateFromWebhook(data: any): void {
+    try {
+      // Aceptar varios formatos posibles
+      const tryArrays: any[] = [];
+      if (Array.isArray(data)) {
+        tryArrays.push(data);
+      } else if (data && typeof data === 'object') {
+        for (const key of ['contacts', 'chats', 'data', 'payload', 'updates', 'results']) {
+          if (Array.isArray((data as any)[key])) {
+            tryArrays.push((data as any)[key]);
+          }
+        }
+        // Algunos eventos pueden traer una sola entrada
+        tryArrays.push([data]);
+      }
+
+      for (const arr of tryArrays) {
+        for (const rec of arr) {
+          const idCandidate = rec?.id ?? rec?.jid ?? rec?.user ?? rec?.remoteJid ?? rec?.wid ?? rec?.wid?._serialized;
+          if (!idCandidate) continue;
+
+          // Evitar grupos
+          if (typeof idCandidate === 'string' && idCandidate.endsWith('@g.us')) continue;
+
+          const normalized = normalizeWhatsAppId(String(idCandidate));
+          if (!normalized) continue;
+
+          const name = this.extractName(rec);
+          if (!name) continue;
+
+          this.cache.set(normalized, { name, expiresAt: this.now() + this.TTL_MS });
+        }
+      }
+    } catch (e) {
+      if (process.env.NODE_ENV !== 'test') {
+        console.warn('ContactsService.updateFromWebhook: parse error', e);
+      }
+    }
+  }
+
+  private static async maybeFetchFromApi(digitsId: string): Promise<string | null> {
+    const baseUrl = process.env.EVOLUTION_API_URL;
+    const instance = process.env.EVOLUTION_API_INSTANCE;
+    const apikey = process.env.EVOLUTION_API_KEY;
+
+    if (!baseUrl || !instance || !apikey) return null;
+
+    const url = `${baseUrl}/chat/findContacts/${instance}`;
+    const body = {
+      where: { id: `${digitsId}@s.whatsapp.net` }
+    };
+
+    try {
+      const res = await fetch(url, {
+        method: 'POST',
+        headers: this.getHeaders(),
+        body: JSON.stringify(body),
+      });
+
+      if (!res.ok) {
+        if (process.env.NODE_ENV !== 'test') {
+          const txt = await res.text().catch(() => '');
+          console.warn('ContactsService.findContacts non-OK:', res.status, txt?.slice(0, 200));
+        }
+        return null;
+      }
+
+      const data = await res.json().catch(() => null as any);
+      const arrayCandidates: any[] = Array.isArray(data)
+        ? data
+        : Array.isArray((data as any)?.contacts)
+          ? (data as any).contacts
+          : Array.isArray((data as any)?.data)
+            ? (data as any).data
+            : Array.isArray((data as any)?.result)
+              ? (data as any).result
+              : (data && typeof data === 'object')
+                ? [data]
+                : [];
+
+      let name: string | null = null;
+      for (const rec of arrayCandidates) {
+        const recId = rec?.id ?? rec?.jid ?? rec?.user ?? rec?.remoteJid ?? rec?.wid ?? rec?.wid?._serialized;
+        if (!recId) continue;
+        const norm = normalizeWhatsAppId(String(recId));
+        if (!norm || norm !== digitsId) continue;
+        name = this.extractName(rec);
+        if (name) break;
+      }
+
+      if (name) {
+        this.cache.set(digitsId, { name, expiresAt: this.now() + this.TTL_MS });
+        return name;
+      }
+      return null;
+    } catch (e) {
+      if (process.env.NODE_ENV !== 'test') {
+        console.warn('ContactsService.findContacts error:', e);
+      }
+      return null;
+    }
+  }
+
+  static async getDisplayName(idOrJid: string | null | undefined): Promise<string | null> {
+    const normalized = normalizeWhatsAppId(idOrJid || '');
+    if (!normalized) return null;
+
+    const cached = this.cache.get(normalized);
+    if (cached && cached.expiresAt > this.now()) {
+      return cached.name;
+    }
+
+    // Intento de fetch perezoso
+    const fetched = await this.maybeFetchFromApi(normalized);
+    return fetched || null;
+  }
+}