diff --git a/src/db/migrations/index.ts b/src/db/migrations/index.ts
index 1f44184..009f326 100644
--- a/src/db/migrations/index.ts
+++ b/src/db/migrations/index.ts
@@ -453,5 +453,24 @@ export const migrations: Migration[] = [
         db.exec(`CREATE INDEX IF NOT EXISTS idx_groups_is_community ON groups (is_community);`);
       } catch {}
     }
+  },
+  {
+    version: 17,
+    name: 'task-origins',
+    checksum: 'v17-task-origins-2025-10-20',
+    up: (db: Database) => {
+      db.exec(`PRAGMA foreign_keys = ON;`);
+      db.exec(`
+        CREATE TABLE IF NOT EXISTS task_origins (
+          task_id INTEGER PRIMARY KEY,
+          chat_id TEXT NOT NULL,
+          message_id TEXT NOT NULL,
+          created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%d %H:%M:%f','now')),
+          FOREIGN KEY (task_id) REFERENCES tasks(id) ON DELETE CASCADE
+        );
+      `);
+      db.exec(`CREATE INDEX IF NOT EXISTS idx_task_origins_task ON task_origins (task_id);`);
+      db.exec(`CREATE INDEX IF NOT EXISTS idx_task_origins_chat_msg ON task_origins (chat_id, message_id);`);
+    }
   }
 ];
diff --git a/src/server.ts b/src/server.ts
index 838002c..a4c0294 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -477,17 +477,64 @@ export class WebhookServer {
 			(TaskService as any).dbInstance = WebhookServer.dbInstance;
 
 			// Delegar el manejo del comando
+			const messageId = typeof data?.key?.id === 'string' ? data.key.id : null;
 			const responses = await CommandService.handle({
 				sender: normalizedSenderId,
 				groupId: data.key.remoteJid,
 				message: messageText,
-				mentions
+				mentions,
+				messageId: messageId || undefined
 			});
 
 			// Encolar respuestas si las hay
 			if (responses.length > 0) {
 				await ResponseQueue.add(responses);
 			}
+
+			// Reaccionar al mensaje del comando (Fase 1)
+			try {
+				const reactionsEnabled = String(process.env.REACTIONS_ENABLED || 'false').toLowerCase();
+				const enabled = ['true','1','yes','on'].includes(reactionsEnabled);
+				if (!enabled) return;
+
+				if (!messageId) return;
+
+				const scope = String(process.env.REACTIONS_SCOPE || 'groups').toLowerCase();
+				const isGroup = isGroupId(data.key.remoteJid);
+				if (scope !== 'all' && !isGroup) return;
+
+				// Respetar gating 'enforce'
+				try { (AllowedGroups as any).dbInstance = WebhookServer.dbInstance; } catch {}
+				const mode = String(process.env.GROUP_GATING_MODE || 'off').toLowerCase();
+				if (mode === 'enforce' && isGroup) {
+					try {
+						if (!AllowedGroups.isAllowed(data.key.remoteJid)) {
+							return;
+						}
+					} catch {}
+				}
+
+				// Heurística de outcome: si alguna respuesta sugiere error → ⚠️
+				const anyError = (responses || []).some(r => {
+					const m = String(r?.message || '').toLowerCase();
+					return m.startsWith('ℹ️ uso:'.toLowerCase())
+						|| m.includes('uso:'.toLowerCase())
+						|| m.includes('no puedes')
+						|| m.includes('no permitido')
+						|| m.includes('no encontrada')
+						|| m.includes('comando no reconocido')
+						|| (m.includes('acción') && m.includes('no reconocida'))
+						|| m.includes('⚠️'.toLowerCase());
+				});
+				const emoji = anyError ? '⚠️' : '🤖';
+
+				await ResponseQueue.enqueueReaction(data.key.remoteJid, messageId, emoji);
+			} catch (e) {
+				// No romper el flujo por errores de reacción
+				if (process.env.NODE_ENV !== 'test') {
+					console.warn('⚠️ Reaction enqueue failed:', e);
+				}
+			}
 		}
 	}
 
diff --git a/src/services/command.ts b/src/services/command.ts
index f276d81..a65dc01 100644
--- a/src/services/command.ts
+++ b/src/services/command.ts
@@ -17,6 +17,7 @@ type CommandContext = {
 	groupId: string;    // full JID (e.g., xxx@g.us)
 	message: string;    // raw message text
 	mentions: string[]; // array of raw JIDs mentioned
+	messageId?: string; // id del mensaje origen (para task_origins y reacciones)
 };
 
 export type CommandResponse = {
@@ -1206,6 +1207,16 @@ export class CommandService {
 			}))
 		);
 
+		// Registrar origen del comando para esta tarea (Fase 1)
+		try {
+			if (groupIdToUse && isGroupId(groupIdToUse) && context.messageId) {
+				this.dbInstance.prepare(`
+          INSERT OR IGNORE INTO task_origins (task_id, chat_id, message_id)
+          VALUES (?, ?, ?)
+        `).run(taskId, groupIdToUse, context.messageId);
+			}
+		} catch {}
+
 		// Recuperar la tarea creada para obtener display_code asignado
 		const createdTask = TaskService.getTaskById(taskId);
 
diff --git a/src/services/response-queue.ts b/src/services/response-queue.ts
index 18d09b7..deadcde 100644
--- a/src/services/response-queue.ts
+++ b/src/services/response-queue.ts
@@ -42,6 +42,7 @@ export const ResponseQueue = {
 	MAX_ATTEMPTS: process.env.RQ_MAX_ATTEMPTS ? Number(process.env.RQ_MAX_ATTEMPTS) : 6,
 	BASE_BACKOFF_MS: process.env.RQ_BASE_BACKOFF_MS ? Number(process.env.RQ_BASE_BACKOFF_MS) : 5000,
 	MAX_BACKOFF_MS: process.env.RQ_MAX_BACKOFF_MS ? Number(process.env.RQ_MAX_BACKOFF_MS) : 3600000,
+	REACTIONS_MAX_ATTEMPTS: process.env.RQ_REACTIONS_MAX_ATTEMPTS ? Number(process.env.RQ_REACTIONS_MAX_ATTEMPTS) : null,
 
 	// Limpieza/retención (configurable por entorno)
 	CLEANUP_ENABLED: process.env.RQ_CLEANUP_ENABLED !== 'false',
@@ -106,6 +107,42 @@ export const ResponseQueue = {
 		}
 	},
 
+	// Encolar una reacción con idempotencia (24h) usando metadata canónica
+	async enqueueReaction(chatId: string, messageId: string, emoji: string): Promise<void> {
+		try {
+			if (!chatId || !messageId || !emoji) return;
+
+			// Construir JSON canónico
+			const metaObj = { kind: 'reaction', emoji, chatId, messageId };
+			const metadata = JSON.stringify(metaObj);
+
+			// Ventana de 24h
+			const cutoff = this.futureIso(-24 * 60 * 60 * 1000);
+
+			// Idempotencia: existe job igual reciente en estados activos?
+			const exists = this.dbInstance.prepare(`
+        SELECT 1
+        FROM response_queue
+        WHERE metadata = ?
+          AND status IN ('queued','processing','sent')
+          AND (updated_at > ? OR created_at > ?)
+        LIMIT 1
+      `).get(metadata, cutoff, cutoff) as any;
+
+			if (exists) {
+				return;
+			}
+
+			this.dbInstance.prepare(`
+        INSERT INTO response_queue (recipient, message, metadata, next_attempt_at)
+        VALUES (?, ?, ?, ?)
+      `).run(chatId, '', metadata, this.nowIso());
+		} catch (err) {
+			console.error('Failed to enqueue reaction:', err);
+			throw err;
+		}
+	},
+
 	getHeaders(): HeadersInit {
 		return {
 			apikey: process.env.EVOLUTION_API_KEY || '',
@@ -122,6 +159,42 @@ export const ResponseQueue = {
 			return { ok: false, error: msg };
 		}
 
+		// Detectar jobs de reacción
+		let meta: any = null;
+		try { meta = item.metadata ? JSON.parse(item.metadata) : null; } catch {}
+		if (meta && meta.kind === 'reaction') {
+			const reactionUrl = `${baseUrl}/message/sendReaction/${instance}`;
+			const chatId = String(meta.chatId || '');
+			const messageId = String(meta.messageId || '');
+			const emoji = String(meta.emoji || '');
+			if (!chatId || !messageId || !emoji) {
+				return { ok: false, error: 'invalid_reaction_metadata' };
+			}
+			const payload = {
+				key: { remoteJid: chatId, fromMe: true, id: messageId },
+				reaction: emoji
+			};
+			try {
+				const response = await fetch(reactionUrl, {
+					method: 'POST',
+					headers: this.getHeaders(),
+					body: JSON.stringify(payload),
+				});
+				if (!response.ok) {
+					const body = await response.text().catch(() => '');
+					const errTxt = body?.slice(0, 200) || `HTTP ${response.status}`;
+					console.warn('Send reaction failed:', { status: response.status, body: errTxt });
+					return { ok: false, status: response.status, error: errTxt };
+				}
+				console.log(`✅ Sent reaction with payload: ${JSON.stringify(payload)}`);
+				return { ok: true, status: response.status };
+			} catch (err) {
+				const errMsg = (err instanceof Error ? err.message : String(err));
+				console.error('Network error sending reaction:', errMsg);
+				return { ok: false, error: errMsg };
+			}
+		}
+
 		// Endpoint típico de Evolution API para texto simple
 		const url = `${baseUrl}/message/sendText/${instance}`;
 
@@ -294,8 +367,13 @@ export const ResponseQueue = {
 						continue;
 					}
 
-					// 5xx o error de red: reintento con backoff si no superó el máximo
-					if (attemptsNow >= this.MAX_ATTEMPTS) {
+					// 5xx o error de red: reintento con backoff si no superó el máximo (ajustado para reacciones)
+					let metaForMax: any = null;
+					try { metaForMax = item.metadata ? JSON.parse(String(item.metadata)) : null; } catch {}
+					const isReactionJob = !!(metaForMax && metaForMax.kind === 'reaction');
+					const effectiveMax = isReactionJob && this.REACTIONS_MAX_ATTEMPTS ? this.REACTIONS_MAX_ATTEMPTS : this.MAX_ATTEMPTS;
+
+					if (attemptsNow >= effectiveMax) {
 						this.markFailed(item.id, errMsg, status, attemptsNow);
 						continue;
 					}