diff --git a/src/server.ts b/src/server.ts
index 4760d0e..24d4517 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -335,6 +335,18 @@ export class WebhookServer {
 		const messageTextTrimmed = messageText.trim();
 		const isAdminCmd = messageTextTrimmed.startsWith('/admin');
 
+		// A4: Primer DM "activar" — alta/confirmación idempotente (solo en DM)
+		if (!isGroupId(remoteJid) && messageTextTrimmed === 'activar') {
+			const base = (process.env.WEB_BASE_URL || '').trim();
+			const msg = base
+				? "Listo, ya puedes reclamar/ser responsable y acceder a la web. Para acceder a la web, envía '/t web' y abre el enlace."
+				: "Listo, ya puedes reclamar/ser responsable.";
+			try {
+				await ResponseQueue.add([{ recipient: normalizedSenderId, message: msg }]);
+			} catch {}
+			return;
+		}
+
 		// Etapa 2: Descubrimiento seguro de grupos (modo 'discover')
 		if (isGroupId(remoteJid)) {
 			try { (AllowedGroups as any).dbInstance = WebhookServer.dbInstance; } catch {}
diff --git a/src/services/command.ts b/src/services/command.ts
index 83ef7c5..31fe1a9 100644
--- a/src/services/command.ts
+++ b/src/services/command.ts
@@ -1042,10 +1042,15 @@ export class CommandService {
 		};
 
 		// 1) Menciones aportadas por el backend (JIDs crudos)
+		const unresolvedAssigneeDisplays: string[] = [];
 		const mentionsNormalizedFromContext = Array.from(new Set(
 			(context.mentions || []).map((j) => {
 				const norm = normalizeWhatsAppId(j);
 				if (!norm) {
+					// agregar a no resolubles para JIT (mostrar sin @ ni dominio)
+					const raw = String(j || '');
+					const disp = raw.split('@')[0].split(':')[0].replace(/^@+/, '').replace(/^\+/, '');
+					if (disp) unresolvedAssigneeDisplays.push(disp);
 					incOnboardingFailure('mentions', 'invalid');
 					return null;
 				}
@@ -1053,6 +1058,8 @@ export class CommandService {
 				if (resolved) return resolved;
 				const p = plausibility(norm);
 				if (p.ok) return norm;
+				// conservar para copy JIT
+				unresolvedAssigneeDisplays.push(norm);
 				incOnboardingFailure('mentions', p.reason!);
 				return null;
 			}).filter((id): id is string => !!id)
@@ -1066,6 +1073,8 @@ export class CommandService {
 			atTokenCandidates.map((v) => {
 				const norm = normalizeWhatsAppId(v);
 				if (!norm) {
+					// agregar a no resolubles para JIT (texto ya viene sin @/+)
+					if (v) unresolvedAssigneeDisplays.push(v);
 					incOnboardingFailure('tokens', 'invalid');
 					return null;
 				}
@@ -1073,6 +1082,8 @@ export class CommandService {
 				if (resolved) return resolved;
 				const p = plausibility(norm);
 				if (p.ok) return norm;
+				// conservar para copy JIT (preferimos el token limpio v)
+				unresolvedAssigneeDisplays.push(v);
 				incOnboardingFailure('tokens', p.reason!);
 				return null;
 			}).filter((id): id is string => !!id)
@@ -1195,7 +1206,38 @@ export class CommandService {
 			});
 		}
 
-
+		// A4: DM JIT al asignador si quedaron menciones/tokens irrecuperables
+		{
+			const unresolvedList = Array.from(new Set(unresolvedAssigneeDisplays.filter(Boolean)));
+			if (unresolvedList.length > 0) {
+				const isTest = String(process.env.NODE_ENV || '').toLowerCase() === 'test';
+				const enabled = isTest
+					? String(process.env.ONBOARDING_ENABLE_IN_TEST || '').toLowerCase() === 'true'
+					: (() => {
+							const v = process.env.ONBOARDING_PROMPTS_ENABLED;
+							return v == null ? true : ['true','1','yes'].includes(String(v).toLowerCase());
+						})();
+				const groupLabel = isGroupId(context.groupId) ? String(context.groupId) : 'dm';
+				if (!enabled) {
+					try { Metrics.inc('onboarding_prompts_skipped_total', 1, { group_id: groupLabel, source: 'jit_assignee_failure', reason: 'disabled' }); } catch {}
+				} else {
+					const bot = String(process.env.CHATBOT_PHONE_NUMBER || '').trim();
+					if (!bot || !/^\d+$/.test(bot)) {
+						try { Metrics.inc('onboarding_prompts_skipped_total', 1, { group_id: groupLabel, source: 'jit_assignee_failure', reason: 'missing_bot_number' }); } catch {}
+					} else {
+						const list = unresolvedList.join(', ');
+						let groupCtx = '';
+						if (isGroupId(context.groupId)) {
+							const name = GroupSyncService.activeGroupsCache.get(context.groupId) || context.groupId;
+							groupCtx = ` (en el grupo ${name})`;
+						}
+						const msg = `No puedo asignar a ${list} aún${groupCtx}. Pídele que toque este enlace y diga 'activar': https://wa.me/${bot}`;
+						responses.push({ recipient: createdBy, message: msg });
+						try { Metrics.inc('onboarding_prompts_sent_total', 1, { group_id: groupLabel, source: 'jit_assignee_failure' }); } catch {}
+					}
+				}
+			}
+		}
 
 		return responses;
 	}