From 693bca6cca5decf5a09fa8f6a556c0561a2f31c8 Mon Sep 17 00:00:00 2001
From: Shawn Jackson <shawn@resgrid.com>
Date: Wed, 15 Jul 2026 20:58:50 -0700
Subject: [PATCH] RG-T125 Chatbot fix

---
 .../Resgrid.Model/Helpers/SerializerHelper.cs | 21 ++++++++++++++++++-
 .../Queue/ChatbotMessageQueueItem.cs          |  1 +
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/Core/Resgrid.Model/Helpers/SerializerHelper.cs b/Core/Resgrid.Model/Helpers/SerializerHelper.cs
index 50bb57043..022aa5900 100644
--- a/Core/Resgrid.Model/Helpers/SerializerHelper.cs
+++ b/Core/Resgrid.Model/Helpers/SerializerHelper.cs
@@ -1,5 +1,7 @@
-using ProtoBuf;
+using ProtoBuf;
+using Resgrid.Model.Events;
 using Resgrid.Model.Identity;
+using Resgrid.Model.Queue;
 
 namespace Resgrid.Model.Helpers
 {
@@ -7,6 +9,7 @@ public static class SerializerHelper
 	{
 		public static void WarmUpProtobufSerializer()
 		{
+			// Core model types (also serialized into the cache).
 			Serializer.PrepareSerializer<Department>();
 			Serializer.PrepareSerializer<Address>();
 			Serializer.PrepareSerializer<DepartmentMember>();
@@ -17,6 +20,22 @@ public static void WarmUpProtobufSerializer()
 			Serializer.PrepareSerializer<PlanLimit>();
 			Serializer.PrepareSerializer<IdentityUser>();
 			Serializer.PrepareSerializer<UserProfile>();
+
+			// Every payload type published to RabbitMQ (see RabbitOutboundQueueProvider).
+			// Preparing them here builds the protobuf contract at startup, so a type that is
+			// missing [ProtoContract] fails fast on boot instead of on the first enqueue.
+			Serializer.PrepareSerializer<CallQueueItem>();
+			Serializer.PrepareSerializer<ChatbotMessageQueueItem>();
+			Serializer.PrepareSerializer<MessageQueueItem>();
+			Serializer.PrepareSerializer<DistributionListQueueItem>();
+			Serializer.PrepareSerializer<NotificationItem>();
+			Serializer.PrepareSerializer<ShiftQueueItem>();
+			Serializer.PrepareSerializer<WorkflowQueueItem>();
+			Serializer.PrepareSerializer<CqrsEvent>();
+			Serializer.PrepareSerializer<AuditEvent>();
+			Serializer.PrepareSerializer<UnitLocationEvent>();
+			Serializer.PrepareSerializer<PersonnelLocationEvent>();
+			Serializer.PrepareSerializer<SecurityRefreshEvent>();
 		}
 	}
 }
diff --git a/Core/Resgrid.Model/Queue/ChatbotMessageQueueItem.cs b/Core/Resgrid.Model/Queue/ChatbotMessageQueueItem.cs
index e94ee9602..36bfe92c2 100644
--- a/Core/Resgrid.Model/Queue/ChatbotMessageQueueItem.cs
+++ b/Core/Resgrid.Model/Queue/ChatbotMessageQueueItem.cs
@@ -8,6 +8,7 @@ namespace Resgrid.Model.Queue
 	/// The worker resolves IChatbotIngressService, processes the message, and sends the reply
 	/// back to <see cref="From"/> via the SMS transport.
 	/// </summary>
+	[ProtoContract]
 	public class ChatbotMessageQueueItem
 	{
 		[ProtoMember(1)]