diff --git a/tests/unit/services/command.task-origins.test.ts b/tests/unit/services/command.task-origins.test.ts
new file mode 100644
index 0000000..67eae9f
--- /dev/null
+++ b/tests/unit/services/command.task-origins.test.ts
@@ -0,0 +1,55 @@
+import { describe, it, expect, beforeAll, beforeEach } from 'bun:test';
+import { Database } from 'bun:sqlite';
+import { initializeDatabase } from '../../../src/db';
+import { TaskService } from '../../../src/tasks/service';
+import { CommandService } from '../../../src/services/command';
+import { GroupSyncService } from '../../../src/services/group-sync';
+
+describe('CommandService - inserta task_origins al crear en grupo con messageId', () => {
+  let memdb: Database;
+
+  beforeAll(() => {
+    memdb = new Database(':memory:');
+    initializeDatabase(memdb);
+    (TaskService as any).dbInstance = memdb;
+    (CommandService as any).dbInstance = memdb;
+
+    // Sembrar grupo activo y cache
+    memdb.exec(`
+      INSERT OR IGNORE INTO groups (id, community_id, name, active, archived, is_community, last_verified)
+      VALUES ('g1@g.us', 'comm-1', 'G1', 1, 0, 0, strftime('%Y-%m-%d %H:%M:%f','now'))
+    `);
+    try { (GroupSyncService as any).dbInstance = memdb; } catch {}
+    GroupSyncService.activeGroupsCache?.clear?.();
+    GroupSyncService.activeGroupsCache?.set?.('g1@g.us', 'G1');
+  });
+
+  beforeEach(() => {
+    process.env.NODE_ENV = 'test';
+    memdb.exec('DELETE FROM task_assignments; DELETE FROM tasks; DELETE FROM task_origins;');
+  });
+
+  it('crea tarea en grupo y registra (task_id, chat_id, message_id)', async () => {
+    const sender = '600111222';
+    const res = await CommandService.handle({
+      sender,
+      groupId: 'g1@g.us',
+      message: '/t n pruebas origen 2099-01-05',
+      mentions: [],
+      messageId: 'MSG-ORIG-1'
+    });
+
+    expect(res.length).toBeGreaterThan(0);
+
+    const t = memdb.prepare(`SELECT id FROM tasks ORDER BY id DESC LIMIT 1`).get() as any;
+    expect(t).toBeTruthy();
+    const row = memdb.prepare(`
+      SELECT task_id, chat_id, message_id FROM task_origins WHERE task_id = ?
+    `).get(Number(t.id)) as any;
+
+    expect(row).toBeTruthy();
+    expect(Number(row.task_id)).toBe(Number(t.id));
+    expect(String(row.chat_id)).toBe('g1@g.us');
+    expect(String(row.message_id)).toBe('MSG-ORIG-1');
+  });
+});
diff --git a/tests/unit/services/response-queue.reactions.test.ts b/tests/unit/services/response-queue.reactions.test.ts
new file mode 100644
index 0000000..5da435f
--- /dev/null
+++ b/tests/unit/services/response-queue.reactions.test.ts
@@ -0,0 +1,82 @@
+import { describe, it, expect, beforeEach, afterEach } from 'bun:test';
+import { Database } from 'bun:sqlite';
+import { initializeDatabase } from '../../../src/db';
+import { ResponseQueue } from '../../../src/services/response-queue';
+
+const ORIGINAL_FETCH = globalThis.fetch;
+const envBackup = { ...process.env };
+
+describe('ResponseQueue - jobs de reacción (enqueue + sendOne)', () => {
+  let memdb: Database;
+  let captured: { url?: string; payload?: any } = {};
+
+  beforeEach(() => {
+    process.env = {
+      ...envBackup,
+      NODE_ENV: 'test',
+      EVOLUTION_API_URL: 'http://evolution.test',
+      EVOLUTION_API_INSTANCE: 'instance-1',
+      EVOLUTION_API_KEY: 'apikey',
+      RQ_REACTIONS_MAX_ATTEMPTS: '3',
+    };
+
+    memdb = new Database(':memory:');
+    memdb.exec('PRAGMA foreign_keys = ON;');
+    initializeDatabase(memdb);
+
+    (ResponseQueue as any).dbInstance = memdb;
+
+    globalThis.fetch = async (url: RequestInfo | URL, init?: RequestInit) => {
+      captured.url = String(url);
+      try {
+        captured.payload = init?.body ? JSON.parse(String(init.body)) : null;
+      } catch {
+        captured.payload = null;
+      }
+      return new Response(JSON.stringify({ ok: true }), {
+        status: 200,
+        headers: { 'Content-Type': 'application/json' }
+      });
+    };
+
+    memdb.exec('DELETE FROM response_queue');
+    captured = {};
+  });
+
+  afterEach(() => {
+    globalThis.fetch = ORIGINAL_FETCH;
+    process.env = envBackup;
+    try { memdb.close(); } catch {}
+  });
+
+  it('enqueueReaction aplica idempotencia por (chatId, messageId, emoji) en ventana 24h', async () => {
+    await ResponseQueue.enqueueReaction('123@g.us', 'MSG-1', '🤖');
+    await ResponseQueue.enqueueReaction('123@g.us', 'MSG-1', '🤖'); // duplicado → ignorar
+
+    const cnt = memdb.prepare(`SELECT COUNT(*) AS c FROM response_queue`).get() as any;
+    expect(Number(cnt.c)).toBe(1);
+
+    // Mismo chat y mensaje, emoji distinto → debe insertar
+    await ResponseQueue.enqueueReaction('123@g.us', 'MSG-1', '⚠️');
+    const cnt2 = memdb.prepare(`SELECT COUNT(*) AS c FROM response_queue`).get() as any;
+    expect(Number(cnt2.c)).toBe(2);
+  });
+
+  it('sendOne con metadata.kind === "reaction" usa /message/sendReaction y payload esperado', async () => {
+    const item = {
+      id: 42,
+      recipient: '123@g.us',
+      message: '', // no se usa para reaction
+      attempts: 0,
+      metadata: JSON.stringify({ kind: 'reaction', emoji: '🤖', chatId: '123@g.us', messageId: 'MSG-99' }),
+    };
+
+    const res = await ResponseQueue.sendOne(item as any);
+    expect(res.ok).toBe(true);
+
+    expect(captured.url?.includes('/message/sendReaction/instance-1')).toBe(true);
+    expect(captured.payload).toBeDefined();
+    expect(captured.payload.reaction).toBe('🤖');
+    expect(captured.payload.key).toEqual({ remoteJid: '123@g.us', fromMe: true, id: 'MSG-99' });
+  });
+});