diff --git a/src/services/command.ts b/src/services/command.ts
index e548ae3..3e48a7e 100644
--- a/src/services/command.ts
+++ b/src/services/command.ts
@@ -788,14 +788,14 @@ export class CommandService {
     const ownerPart = assignmentUserIds.length === 0
       ? `${ICONS.unassigned} sin responsable${groupName ? ` (${groupName})` : ''}`
       : `${assignmentUserIds.length > 1 ? '👥' : '👤'} ${assignedDisplayNames.join(', ')}`;
-    const ackParts = [
-      `${ICONS.create} ${taskId} _${description || '(sin descripción)'}_`,
+    const ackLines = [
+      `${ICONS.create} ${codeId(taskId)} _${description || '(sin descripción)'}_`,
       dueFmt ? `${ICONS.date} ${dueFmt}` : null,
       ownerPart
     ].filter(Boolean);
     responses.push({
       recipient: createdBy,
-      message: ackParts.join(' — '),
+      message: ackLines.join('\n'),
       mentions: mentionsForSending.length > 0 ? mentionsForSending : undefined
     });
 
diff --git a/tests/unit/services/command.test.ts b/tests/unit/services/command.test.ts
index 960839b..4eb9c82 100644
--- a/tests/unit/services/command.test.ts
+++ b/tests/unit/services/command.test.ts
@@ -309,8 +309,8 @@ describe('CommandService', () => {
 
     expect(responses.length).toBe(1);
     expect(responses[0].recipient).toBe('1234567890');
-    // Debe empezar con "📝 <id> "
-    expect(responses[0].message).toMatch(/^📝 \d+ /);
+    // Debe empezar con "📝 `0001` "
+    expect(responses[0].message).toMatch(/^📝 `\d{4}` /);
     // Debe contener la descripción en cursiva compacta
     expect(responses[0].message).toContain('_Test task_');
     // No debe usar el texto antiguo "Tarea <id> creada"