diff --git a/api/orchestration.go b/api/orchestration.go
index a320f602..fd3b0944 100644
--- a/api/orchestration.go
+++ b/api/orchestration.go
@@ -70,6 +70,10 @@ type PurgeOptions func(*protos.PurgeInstancesRequest) error
 
 type RerunOptions func(*protos.RerunWorkflowFromEventRequest) error
 
+type ListInstanceIDsOptions func(*protos.ListInstanceIDsRequest) error
+
+type GetInstanceHistoryOptions func(*protos.GetInstanceHistoryRequest) error
+
 // WithInstanceID configures an explicit orchestration instance ID. If not specified,
 // a random UUID value will be used for the orchestration instance ID.
 func WithInstanceID(id InstanceID) NewOrchestrationOptions {
@@ -221,3 +225,17 @@ func WithRerunNewInstanceID(id InstanceID) RerunOptions {
 		return nil
 	}
 }
+
+func WithListInstanceIDsPageSize(pageSize uint32) ListInstanceIDsOptions {
+	return func(req *protos.ListInstanceIDsRequest) error {
+		req.PageSize = &pageSize
+		return nil
+	}
+}
+
+func WithListInstanceIDsContinuationToken(token string) ListInstanceIDsOptions {
+	return func(req *protos.ListInstanceIDsRequest) error {
+		req.ContinuationToken = &token
+		return nil
+	}
+}
diff --git a/api/protos/backend_service.pb.go b/api/protos/backend_service.pb.go
index e478c96c..52ab5ef6 100644
--- a/api/protos/backend_service.pb.go
+++ b/api/protos/backend_service.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.32.0
-// 	protoc        v5.29.3
+// 	protoc        v6.30.2
 // source: backend_service.proto
 
 package protos
@@ -2032,7 +2032,7 @@ var file_backend_service_proto_rawDesc = []byte{
 	0x65, 0x63, 0x6f, 0x6e, 0x64, 0x73, 0x22, 0x2e, 0x0a, 0x16, 0x43, 0x6f, 0x6e, 0x6e, 0x65, 0x63,
 	0x74, 0x65, 0x64, 0x57, 0x6f, 0x72, 0x6b, 0x65, 0x72, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73,
 	0x12, 0x14, 0x0a, 0x05, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52,
-	0x05, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x32, 0xfd, 0x10, 0x0a, 0x0e, 0x42, 0x61, 0x63, 0x6b, 0x65,
+	0x05, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x32, 0x92, 0x12, 0x0a, 0x0e, 0x42, 0x61, 0x63, 0x6b, 0x65,
 	0x6e, 0x64, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x12, 0x41, 0x0a, 0x0e, 0x43, 0x72, 0x65,
 	0x61, 0x74, 0x65, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63, 0x65, 0x12, 0x16, 0x2e, 0x43, 0x72,
 	0x65, 0x61, 0x74, 0x65, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63, 0x65, 0x52, 0x65, 0x71, 0x75,
@@ -2168,13 +2168,22 @@ var file_backend_service_proto_rawDesc = []byte{
 	0x65, 0x73, 0x74, 0x1a, 0x31, 0x2e, 0x64, 0x75, 0x72, 0x61, 0x62, 0x6c, 0x65, 0x74, 0x61, 0x73,
 	0x6b, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x73, 0x2e, 0x62, 0x61, 0x63, 0x6b, 0x65, 0x6e, 0x64,
 	0x2e, 0x76, 0x31, 0x2e, 0x47, 0x65, 0x74, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x52, 0x65,
-	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x56, 0x0a, 0x2b, 0x69, 0x6f, 0x2e, 0x64, 0x61, 0x70,
-	0x72, 0x2e, 0x64, 0x75, 0x72, 0x61, 0x62, 0x6c, 0x65, 0x74, 0x61, 0x73, 0x6b, 0x2e, 0x69, 0x6d,
-	0x70, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f,
-	0x74, 0x6f, 0x62, 0x75, 0x66, 0x5a, 0x0b, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x73, 0xaa, 0x02, 0x19, 0x44, 0x61, 0x70, 0x72, 0x2e, 0x44, 0x75, 0x72, 0x61, 0x62, 0x6c,
-	0x65, 0x54, 0x61, 0x73, 0x6b, 0x2e, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x62, 0x06,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x44, 0x0a, 0x0f, 0x4c, 0x69, 0x73, 0x74, 0x49, 0x6e,
+	0x73, 0x74, 0x61, 0x6e, 0x63, 0x65, 0x49, 0x44, 0x73, 0x12, 0x17, 0x2e, 0x4c, 0x69, 0x73, 0x74,
+	0x49, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63, 0x65, 0x49, 0x44, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65,
+	0x73, 0x74, 0x1a, 0x18, 0x2e, 0x4c, 0x69, 0x73, 0x74, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63,
+	0x65, 0x49, 0x44, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x4d, 0x0a, 0x12,
+	0x47, 0x65, 0x74, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63, 0x65, 0x48, 0x69, 0x73, 0x74, 0x6f,
+	0x72, 0x79, 0x12, 0x1a, 0x2e, 0x47, 0x65, 0x74, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63, 0x65,
+	0x48, 0x69, 0x73, 0x74, 0x6f, 0x72, 0x79, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1b,
+	0x2e, 0x47, 0x65, 0x74, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x63, 0x65, 0x48, 0x69, 0x73, 0x74,
+	0x6f, 0x72, 0x79, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x56, 0x0a, 0x2b, 0x69,
+	0x6f, 0x2e, 0x64, 0x61, 0x70, 0x72, 0x2e, 0x64, 0x75, 0x72, 0x61, 0x62, 0x6c, 0x65, 0x74, 0x61,
+	0x73, 0x6b, 0x2e, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x74, 0x69, 0x6f,
+	0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x5a, 0x0b, 0x2f, 0x61, 0x70, 0x69,
+	0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x73, 0xaa, 0x02, 0x19, 0x44, 0x61, 0x70, 0x72, 0x2e, 0x44,
+	0x75, 0x72, 0x61, 0x62, 0x6c, 0x65, 0x54, 0x61, 0x73, 0x6b, 0x2e, 0x50, 0x72, 0x6f, 0x74, 0x6f,
+	0x62, 0x75, 0x66, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -2240,15 +2249,19 @@ var file_backend_service_proto_goTypes = []interface{}{
 	(*CleanEntityStorageRequest)(nil),             // 46: CleanEntityStorageRequest
 	(*GetWorkItemsRequest)(nil),                   // 47: GetWorkItemsRequest
 	(*StreamInstanceHistoryRequest)(nil),          // 48: StreamInstanceHistoryRequest
-	(*CreateInstanceResponse)(nil),                // 49: CreateInstanceResponse
-	(*GetInstanceResponse)(nil),                   // 50: GetInstanceResponse
-	(*GetEntityResponse)(nil),                     // 51: GetEntityResponse
-	(*QueryInstancesResponse)(nil),                // 52: QueryInstancesResponse
-	(*QueryEntitiesResponse)(nil),                 // 53: QueryEntitiesResponse
-	(*PurgeInstancesResponse)(nil),                // 54: PurgeInstancesResponse
-	(*CleanEntityStorageResponse)(nil),            // 55: CleanEntityStorageResponse
-	(*WorkItem)(nil),                              // 56: WorkItem
-	(*HistoryChunk)(nil),                          // 57: HistoryChunk
+	(*ListInstanceIDsRequest)(nil),                // 49: ListInstanceIDsRequest
+	(*GetInstanceHistoryRequest)(nil),             // 50: GetInstanceHistoryRequest
+	(*CreateInstanceResponse)(nil),                // 51: CreateInstanceResponse
+	(*GetInstanceResponse)(nil),                   // 52: GetInstanceResponse
+	(*GetEntityResponse)(nil),                     // 53: GetEntityResponse
+	(*QueryInstancesResponse)(nil),                // 54: QueryInstancesResponse
+	(*QueryEntitiesResponse)(nil),                 // 55: QueryEntitiesResponse
+	(*PurgeInstancesResponse)(nil),                // 56: PurgeInstancesResponse
+	(*CleanEntityStorageResponse)(nil),            // 57: CleanEntityStorageResponse
+	(*WorkItem)(nil),                              // 58: WorkItem
+	(*HistoryChunk)(nil),                          // 59: HistoryChunk
+	(*ListInstanceIDsResponse)(nil),               // 60: ListInstanceIDsResponse
+	(*GetInstanceHistoryResponse)(nil),            // 61: GetInstanceHistoryResponse
 }
 var file_backend_service_proto_depIdxs = []int32{
 	31, // 0: durabletask.protos.backend.v1.AddEventRequest.instance:type_name -> OrchestrationInstance
@@ -2308,28 +2321,32 @@ var file_backend_service_proto_depIdxs = []int32{
 	17, // 54: durabletask.protos.backend.v1.BackendService.AbandonEntityWorkItem:input_type -> durabletask.protos.backend.v1.AbandonEntityWorkItemRequest
 	19, // 55: durabletask.protos.backend.v1.BackendService.Ping:input_type -> durabletask.protos.backend.v1.PingRequest
 	26, // 56: durabletask.protos.backend.v1.BackendService.GetMetrics:input_type -> durabletask.protos.backend.v1.GetMetricsRequest
-	49, // 57: durabletask.protos.backend.v1.BackendService.CreateInstance:output_type -> CreateInstanceResponse
-	1,  // 58: durabletask.protos.backend.v1.BackendService.AddEvent:output_type -> durabletask.protos.backend.v1.AddEventResponse
-	50, // 59: durabletask.protos.backend.v1.BackendService.GetInstance:output_type -> GetInstanceResponse
-	51, // 60: durabletask.protos.backend.v1.BackendService.GetEntity:output_type -> GetEntityResponse
-	52, // 61: durabletask.protos.backend.v1.BackendService.QueryInstances:output_type -> QueryInstancesResponse
-	53, // 62: durabletask.protos.backend.v1.BackendService.QueryEntities:output_type -> QueryEntitiesResponse
-	3,  // 63: durabletask.protos.backend.v1.BackendService.WaitForInstance:output_type -> durabletask.protos.backend.v1.WaitForInstanceResponse
-	54, // 64: durabletask.protos.backend.v1.BackendService.PurgeInstances:output_type -> PurgeInstancesResponse
-	55, // 65: durabletask.protos.backend.v1.BackendService.CleanEntityStorage:output_type -> CleanEntityStorageResponse
-	56, // 66: durabletask.protos.backend.v1.BackendService.GetWorkItems:output_type -> WorkItem
-	5,  // 67: durabletask.protos.backend.v1.BackendService.GetOrchestrationRuntimeState:output_type -> durabletask.protos.backend.v1.GetOrchestrationRuntimeStateResponse
-	57, // 68: durabletask.protos.backend.v1.BackendService.StreamInstanceHistory:output_type -> HistoryChunk
-	7,  // 69: durabletask.protos.backend.v1.BackendService.CompleteActivityWorkItem:output_type -> durabletask.protos.backend.v1.CompleteActivityWorkItemResponse
-	9,  // 70: durabletask.protos.backend.v1.BackendService.AbandonActivityWorkItem:output_type -> durabletask.protos.backend.v1.AbandonActivityWorkItemResponse
-	11, // 71: durabletask.protos.backend.v1.BackendService.CompleteOrchestrationWorkItem:output_type -> durabletask.protos.backend.v1.CompleteOrchestrationWorkItemResponse
-	14, // 72: durabletask.protos.backend.v1.BackendService.AbandonOrchestrationWorkItem:output_type -> durabletask.protos.backend.v1.AbandonOrchestrationWorkItemResponse
-	16, // 73: durabletask.protos.backend.v1.BackendService.CompleteEntityWorkItem:output_type -> durabletask.protos.backend.v1.CompleteEntityWorkItemResponse
-	18, // 74: durabletask.protos.backend.v1.BackendService.AbandonEntityWorkItem:output_type -> durabletask.protos.backend.v1.AbandonEntityWorkItemResponse
-	20, // 75: durabletask.protos.backend.v1.BackendService.Ping:output_type -> durabletask.protos.backend.v1.PingResponse
-	27, // 76: durabletask.protos.backend.v1.BackendService.GetMetrics:output_type -> durabletask.protos.backend.v1.GetMetricsResponse
-	57, // [57:77] is the sub-list for method output_type
-	37, // [37:57] is the sub-list for method input_type
+	49, // 57: durabletask.protos.backend.v1.BackendService.ListInstanceIDs:input_type -> ListInstanceIDsRequest
+	50, // 58: durabletask.protos.backend.v1.BackendService.GetInstanceHistory:input_type -> GetInstanceHistoryRequest
+	51, // 59: durabletask.protos.backend.v1.BackendService.CreateInstance:output_type -> CreateInstanceResponse
+	1,  // 60: durabletask.protos.backend.v1.BackendService.AddEvent:output_type -> durabletask.protos.backend.v1.AddEventResponse
+	52, // 61: durabletask.protos.backend.v1.BackendService.GetInstance:output_type -> GetInstanceResponse
+	53, // 62: durabletask.protos.backend.v1.BackendService.GetEntity:output_type -> GetEntityResponse
+	54, // 63: durabletask.protos.backend.v1.BackendService.QueryInstances:output_type -> QueryInstancesResponse
+	55, // 64: durabletask.protos.backend.v1.BackendService.QueryEntities:output_type -> QueryEntitiesResponse
+	3,  // 65: durabletask.protos.backend.v1.BackendService.WaitForInstance:output_type -> durabletask.protos.backend.v1.WaitForInstanceResponse
+	56, // 66: durabletask.protos.backend.v1.BackendService.PurgeInstances:output_type -> PurgeInstancesResponse
+	57, // 67: durabletask.protos.backend.v1.BackendService.CleanEntityStorage:output_type -> CleanEntityStorageResponse
+	58, // 68: durabletask.protos.backend.v1.BackendService.GetWorkItems:output_type -> WorkItem
+	5,  // 69: durabletask.protos.backend.v1.BackendService.GetOrchestrationRuntimeState:output_type -> durabletask.protos.backend.v1.GetOrchestrationRuntimeStateResponse
+	59, // 70: durabletask.protos.backend.v1.BackendService.StreamInstanceHistory:output_type -> HistoryChunk
+	7,  // 71: durabletask.protos.backend.v1.BackendService.CompleteActivityWorkItem:output_type -> durabletask.protos.backend.v1.CompleteActivityWorkItemResponse
+	9,  // 72: durabletask.protos.backend.v1.BackendService.AbandonActivityWorkItem:output_type -> durabletask.protos.backend.v1.AbandonActivityWorkItemResponse
+	11, // 73: durabletask.protos.backend.v1.BackendService.CompleteOrchestrationWorkItem:output_type -> durabletask.protos.backend.v1.CompleteOrchestrationWorkItemResponse
+	14, // 74: durabletask.protos.backend.v1.BackendService.AbandonOrchestrationWorkItem:output_type -> durabletask.protos.backend.v1.AbandonOrchestrationWorkItemResponse
+	16, // 75: durabletask.protos.backend.v1.BackendService.CompleteEntityWorkItem:output_type -> durabletask.protos.backend.v1.CompleteEntityWorkItemResponse
+	18, // 76: durabletask.protos.backend.v1.BackendService.AbandonEntityWorkItem:output_type -> durabletask.protos.backend.v1.AbandonEntityWorkItemResponse
+	20, // 77: durabletask.protos.backend.v1.BackendService.Ping:output_type -> durabletask.protos.backend.v1.PingResponse
+	27, // 78: durabletask.protos.backend.v1.BackendService.GetMetrics:output_type -> durabletask.protos.backend.v1.GetMetricsResponse
+	60, // 79: durabletask.protos.backend.v1.BackendService.ListInstanceIDs:output_type -> ListInstanceIDsResponse
+	61, // 80: durabletask.protos.backend.v1.BackendService.GetInstanceHistory:output_type -> GetInstanceHistoryResponse
+	59, // [59:81] is the sub-list for method output_type
+	37, // [37:59] is the sub-list for method input_type
 	37, // [37:37] is the sub-list for extension type_name
 	37, // [37:37] is the sub-list for extension extendee
 	0,  // [0:37] is the sub-list for field type_name
diff --git a/api/protos/backend_service_grpc.pb.go b/api/protos/backend_service_grpc.pb.go
index 491a99c7..f3dffee3 100644
--- a/api/protos/backend_service_grpc.pb.go
+++ b/api/protos/backend_service_grpc.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.3.0
-// - protoc             v5.29.3
+// - protoc             v6.30.2
 // source: backend_service.proto
 
 package protos
@@ -42,6 +42,8 @@ const (
 	BackendService_AbandonEntityWorkItem_FullMethodName         = "/durabletask.protos.backend.v1.BackendService/AbandonEntityWorkItem"
 	BackendService_Ping_FullMethodName                          = "/durabletask.protos.backend.v1.BackendService/Ping"
 	BackendService_GetMetrics_FullMethodName                    = "/durabletask.protos.backend.v1.BackendService/GetMetrics"
+	BackendService_ListInstanceIDs_FullMethodName               = "/durabletask.protos.backend.v1.BackendService/ListInstanceIDs"
+	BackendService_GetInstanceHistory_FullMethodName            = "/durabletask.protos.backend.v1.BackendService/GetInstanceHistory"
 )
 
 // BackendServiceClient is the client API for BackendService service.
@@ -89,6 +91,8 @@ type BackendServiceClient interface {
 	Ping(ctx context.Context, in *PingRequest, opts ...grpc.CallOption) (*PingResponse, error)
 	// Returns the current metrics for the backend service.
 	GetMetrics(ctx context.Context, in *GetMetricsRequest, opts ...grpc.CallOption) (*GetMetricsResponse, error)
+	ListInstanceIDs(ctx context.Context, in *ListInstanceIDsRequest, opts ...grpc.CallOption) (*ListInstanceIDsResponse, error)
+	GetInstanceHistory(ctx context.Context, in *GetInstanceHistoryRequest, opts ...grpc.CallOption) (*GetInstanceHistoryResponse, error)
 }
 
 type backendServiceClient struct {
@@ -325,6 +329,24 @@ func (c *backendServiceClient) GetMetrics(ctx context.Context, in *GetMetricsReq
 	return out, nil
 }
 
+func (c *backendServiceClient) ListInstanceIDs(ctx context.Context, in *ListInstanceIDsRequest, opts ...grpc.CallOption) (*ListInstanceIDsResponse, error) {
+	out := new(ListInstanceIDsResponse)
+	err := c.cc.Invoke(ctx, BackendService_ListInstanceIDs_FullMethodName, in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *backendServiceClient) GetInstanceHistory(ctx context.Context, in *GetInstanceHistoryRequest, opts ...grpc.CallOption) (*GetInstanceHistoryResponse, error) {
+	out := new(GetInstanceHistoryResponse)
+	err := c.cc.Invoke(ctx, BackendService_GetInstanceHistory_FullMethodName, in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // BackendServiceServer is the server API for BackendService service.
 // All implementations must embed UnimplementedBackendServiceServer
 // for forward compatibility
@@ -370,6 +392,8 @@ type BackendServiceServer interface {
 	Ping(context.Context, *PingRequest) (*PingResponse, error)
 	// Returns the current metrics for the backend service.
 	GetMetrics(context.Context, *GetMetricsRequest) (*GetMetricsResponse, error)
+	ListInstanceIDs(context.Context, *ListInstanceIDsRequest) (*ListInstanceIDsResponse, error)
+	GetInstanceHistory(context.Context, *GetInstanceHistoryRequest) (*GetInstanceHistoryResponse, error)
 	mustEmbedUnimplementedBackendServiceServer()
 }
 
@@ -437,6 +461,12 @@ func (UnimplementedBackendServiceServer) Ping(context.Context, *PingRequest) (*P
 func (UnimplementedBackendServiceServer) GetMetrics(context.Context, *GetMetricsRequest) (*GetMetricsResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetMetrics not implemented")
 }
+func (UnimplementedBackendServiceServer) ListInstanceIDs(context.Context, *ListInstanceIDsRequest) (*ListInstanceIDsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListInstanceIDs not implemented")
+}
+func (UnimplementedBackendServiceServer) GetInstanceHistory(context.Context, *GetInstanceHistoryRequest) (*GetInstanceHistoryResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetInstanceHistory not implemented")
+}
 func (UnimplementedBackendServiceServer) mustEmbedUnimplementedBackendServiceServer() {}
 
 // UnsafeBackendServiceServer may be embedded to opt out of forward compatibility for this service.
@@ -816,6 +846,42 @@ func _BackendService_GetMetrics_Handler(srv interface{}, ctx context.Context, de
 	return interceptor(ctx, in, info, handler)
 }
 
+func _BackendService_ListInstanceIDs_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListInstanceIDsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BackendServiceServer).ListInstanceIDs(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: BackendService_ListInstanceIDs_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BackendServiceServer).ListInstanceIDs(ctx, req.(*ListInstanceIDsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _BackendService_GetInstanceHistory_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetInstanceHistoryRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BackendServiceServer).GetInstanceHistory(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: BackendService_GetInstanceHistory_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BackendServiceServer).GetInstanceHistory(ctx, req.(*GetInstanceHistoryRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // BackendService_ServiceDesc is the grpc.ServiceDesc for BackendService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -895,6 +961,14 @@ var BackendService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "GetMetrics",
 			Handler:    _BackendService_GetMetrics_Handler,
 		},
+		{
+			MethodName: "ListInstanceIDs",
+			Handler:    _BackendService_ListInstanceIDs_Handler,
+		},
+		{
+			MethodName: "GetInstanceHistory",
+			Handler:    _BackendService_GetInstanceHistory_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{
diff --git a/api/protos/orchestrator_service.pb.go b/api/protos/orchestrator_service.pb.go
index e69ff7d6..64dd70e6 100644
--- a/api/protos/orchestrator_service.pb.go
+++ b/api/protos/orchestrator_service.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.32.0
-// 	protoc        v5.29.3
+// 	protoc        v6.30.2
 // source: orchestrator_service.proto
 
 package protos
@@ -7408,6 +7408,223 @@ func (x *RerunWorkflowFromEventResponse) GetNewInstanceID() string {
 	return ""
 }
 
+// ListInstanceIDsRequest is used to list all orchestration instances.
+type ListInstanceIDsRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// continuationToken is the continuation token to use for pagination. This
+	// is the token which the next page should start from. If not given, the
+	// first page will be returned.
+	ContinuationToken *string `protobuf:"bytes,1,opt,name=continuationToken,proto3,oneof" json:"continuationToken,omitempty"`
+	// pageSize is the maximum number of instances to return for this page. If
+	// not given, all instances will be attempted to be returned.
+	PageSize *uint32 `protobuf:"varint,2,opt,name=pageSize,proto3,oneof" json:"pageSize,omitempty"`
+}
+
+func (x *ListInstanceIDsRequest) Reset() {
+	*x = ListInstanceIDsRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_orchestrator_service_proto_msgTypes[107]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListInstanceIDsRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListInstanceIDsRequest) ProtoMessage() {}
+
+func (x *ListInstanceIDsRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_orchestrator_service_proto_msgTypes[107]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListInstanceIDsRequest.ProtoReflect.Descriptor instead.
+func (*ListInstanceIDsRequest) Descriptor() ([]byte, []int) {
+	return file_orchestrator_service_proto_rawDescGZIP(), []int{107}
+}
+
+func (x *ListInstanceIDsRequest) GetContinuationToken() string {
+	if x != nil && x.ContinuationToken != nil {
+		return *x.ContinuationToken
+	}
+	return ""
+}
+
+func (x *ListInstanceIDsRequest) GetPageSize() uint32 {
+	if x != nil && x.PageSize != nil {
+		return *x.PageSize
+	}
+	return 0
+}
+
+// ListInstanceIDsResponse is the response to executing ListInstanceIDs.
+type ListInstanceIDsResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// instanceIds is the list of instance IDs returned.
+	InstanceIds []string `protobuf:"bytes,1,rep,name=instanceIds,proto3" json:"instanceIds,omitempty"`
+	// continuationToken is the continuation token to use for pagination. If
+	// there are no more pages, this will be null.
+	ContinuationToken *string `protobuf:"bytes,2,opt,name=continuationToken,proto3,oneof" json:"continuationToken,omitempty"`
+}
+
+func (x *ListInstanceIDsResponse) Reset() {
+	*x = ListInstanceIDsResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_orchestrator_service_proto_msgTypes[108]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListInstanceIDsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListInstanceIDsResponse) ProtoMessage() {}
+
+func (x *ListInstanceIDsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_orchestrator_service_proto_msgTypes[108]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListInstanceIDsResponse.ProtoReflect.Descriptor instead.
+func (*ListInstanceIDsResponse) Descriptor() ([]byte, []int) {
+	return file_orchestrator_service_proto_rawDescGZIP(), []int{108}
+}
+
+func (x *ListInstanceIDsResponse) GetInstanceIds() []string {
+	if x != nil {
+		return x.InstanceIds
+	}
+	return nil
+}
+
+func (x *ListInstanceIDsResponse) GetContinuationToken() string {
+	if x != nil && x.ContinuationToken != nil {
+		return *x.ContinuationToken
+	}
+	return ""
+}
+
+// GetInstanceHistoryRequest is used to get the full history of an
+// orchestration instance.
+type GetInstanceHistoryRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	InstanceId string `protobuf:"bytes,1,opt,name=instanceId,proto3" json:"instanceId,omitempty"`
+}
+
+func (x *GetInstanceHistoryRequest) Reset() {
+	*x = GetInstanceHistoryRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_orchestrator_service_proto_msgTypes[109]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetInstanceHistoryRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetInstanceHistoryRequest) ProtoMessage() {}
+
+func (x *GetInstanceHistoryRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_orchestrator_service_proto_msgTypes[109]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetInstanceHistoryRequest.ProtoReflect.Descriptor instead.
+func (*GetInstanceHistoryRequest) Descriptor() ([]byte, []int) {
+	return file_orchestrator_service_proto_rawDescGZIP(), []int{109}
+}
+
+func (x *GetInstanceHistoryRequest) GetInstanceId() string {
+	if x != nil {
+		return x.InstanceId
+	}
+	return ""
+}
+
+// GetInstanceHistoryResponse is the response to executing GetInstanceHistory.
+type GetInstanceHistoryResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Events []*HistoryEvent `protobuf:"bytes,1,rep,name=events,proto3" json:"events,omitempty"`
+}
+
+func (x *GetInstanceHistoryResponse) Reset() {
+	*x = GetInstanceHistoryResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_orchestrator_service_proto_msgTypes[110]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetInstanceHistoryResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetInstanceHistoryResponse) ProtoMessage() {}
+
+func (x *GetInstanceHistoryResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_orchestrator_service_proto_msgTypes[110]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetInstanceHistoryResponse.ProtoReflect.Descriptor instead.
+func (*GetInstanceHistoryResponse) Descriptor() ([]byte, []int) {
+	return file_orchestrator_service_proto_rawDescGZIP(), []int{110}
+}
+
+func (x *GetInstanceHistoryResponse) GetEvents() []*HistoryEvent {
+	if x != nil {
+		return x.Events
+	}
+	return nil
+}
+
 var File_orchestrator_service_proto protoreflect.FileDescriptor
 
 var file_orchestrator_service_proto_rawDesc = []byte{
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@@ -8876,7 +9128,7 @@ func file_orchestrator_service_proto_rawDescGZIP() []byte {
 }
 
 var file_orchestrator_service_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
-var file_orchestrator_service_proto_msgTypes = make([]protoimpl.MessageInfo, 110)
+var file_orchestrator_service_proto_msgTypes = make([]protoimpl.MessageInfo, 114)
 var file_orchestrator_service_proto_goTypes = []interface{}{
 	(OrchestrationStatus)(0),                       // 0: OrchestrationStatus
 	(CreateOrchestrationAction)(0),                 // 1: CreateOrchestrationAction
@@ -8988,75 +9240,79 @@ var file_orchestrator_service_proto_goTypes = []interface{}{
 	(*HistoryChunk)(nil),                           // 107: HistoryChunk
 	(*RerunWorkflowFromEventRequest)(nil),          // 108: RerunWorkflowFromEventRequest
 	(*RerunWorkflowFromEventResponse)(nil),         // 109: RerunWorkflowFromEventResponse
-	nil,                                            // 110: ExecutionStartedEvent.TagsEntry
-	nil,                                            // 111: CreateInstanceRequest.TagsEntry
-	nil,                                            // 112: OrchestrationState.TagsEntry
-	(*wrapperspb.StringValue)(nil),                 // 113: google.protobuf.StringValue
-	(*timestamppb.Timestamp)(nil),                  // 114: google.protobuf.Timestamp
-	(*wrapperspb.Int32Value)(nil),                  // 115: google.protobuf.Int32Value
-	(*wrapperspb.BoolValue)(nil),                   // 116: google.protobuf.BoolValue
-	(*durationpb.Duration)(nil),                    // 117: google.protobuf.Duration
-	(*emptypb.Empty)(nil),                          // 118: google.protobuf.Empty
+	(*ListInstanceIDsRequest)(nil),                 // 110: ListInstanceIDsRequest
+	(*ListInstanceIDsResponse)(nil),                // 111: ListInstanceIDsResponse
+	(*GetInstanceHistoryRequest)(nil),              // 112: GetInstanceHistoryRequest
+	(*GetInstanceHistoryResponse)(nil),             // 113: GetInstanceHistoryResponse
+	nil,                                            // 114: ExecutionStartedEvent.TagsEntry
+	nil,                                            // 115: CreateInstanceRequest.TagsEntry
+	nil,                                            // 116: OrchestrationState.TagsEntry
+	(*wrapperspb.StringValue)(nil),                 // 117: google.protobuf.StringValue
+	(*timestamppb.Timestamp)(nil),                  // 118: google.protobuf.Timestamp
+	(*wrapperspb.Int32Value)(nil),                  // 119: google.protobuf.Int32Value
+	(*wrapperspb.BoolValue)(nil),                   // 120: google.protobuf.BoolValue
+	(*durationpb.Duration)(nil),                    // 121: google.protobuf.Duration
+	(*emptypb.Empty)(nil),                          // 122: google.protobuf.Empty
 }
 var file_orchestrator_service_proto_depIdxs = []int32{
-	113, // 0: OrchestrationInstance.executionId:type_name -> google.protobuf.StringValue
-	113, // 1: ActivityRequest.version:type_name -> google.protobuf.StringValue
-	113, // 2: ActivityRequest.input:type_name -> google.protobuf.StringValue
+	117, // 0: OrchestrationInstance.executionId:type_name -> google.protobuf.StringValue
+	117, // 1: ActivityRequest.version:type_name -> google.protobuf.StringValue
+	117, // 2: ActivityRequest.input:type_name -> google.protobuf.StringValue
 	4,   // 3: ActivityRequest.orchestrationInstance:type_name -> OrchestrationInstance
 	9,   // 4: ActivityRequest.parentTraceContext:type_name -> TraceContext
-	113, // 5: ActivityResponse.result:type_name -> google.protobuf.StringValue
+	117, // 5: ActivityResponse.result:type_name -> google.protobuf.StringValue
 	7,   // 6: ActivityResponse.failureDetails:type_name -> TaskFailureDetails
-	113, // 7: TaskFailureDetails.stackTrace:type_name -> google.protobuf.StringValue
+	117, // 7: TaskFailureDetails.stackTrace:type_name -> google.protobuf.StringValue
 	7,   // 8: TaskFailureDetails.innerFailure:type_name -> TaskFailureDetails
-	113, // 9: ParentInstanceInfo.name:type_name -> google.protobuf.StringValue
-	113, // 10: ParentInstanceInfo.version:type_name -> google.protobuf.StringValue
+	117, // 9: ParentInstanceInfo.name:type_name -> google.protobuf.StringValue
+	117, // 10: ParentInstanceInfo.version:type_name -> google.protobuf.StringValue
 	4,   // 11: ParentInstanceInfo.orchestrationInstance:type_name -> OrchestrationInstance
-	113, // 12: TraceContext.traceState:type_name -> google.protobuf.StringValue
-	113, // 13: ExecutionStartedEvent.version:type_name -> google.protobuf.StringValue
-	113, // 14: ExecutionStartedEvent.input:type_name -> google.protobuf.StringValue
+	117, // 12: TraceContext.traceState:type_name -> google.protobuf.StringValue
+	117, // 13: ExecutionStartedEvent.version:type_name -> google.protobuf.StringValue
+	117, // 14: ExecutionStartedEvent.input:type_name -> google.protobuf.StringValue
 	4,   // 15: ExecutionStartedEvent.orchestrationInstance:type_name -> OrchestrationInstance
 	8,   // 16: ExecutionStartedEvent.parentInstance:type_name -> ParentInstanceInfo
-	114, // 17: ExecutionStartedEvent.scheduledStartTimestamp:type_name -> google.protobuf.Timestamp
+	118, // 17: ExecutionStartedEvent.scheduledStartTimestamp:type_name -> google.protobuf.Timestamp
 	9,   // 18: ExecutionStartedEvent.parentTraceContext:type_name -> TraceContext
-	113, // 19: ExecutionStartedEvent.orchestrationSpanID:type_name -> google.protobuf.StringValue
-	110, // 20: ExecutionStartedEvent.tags:type_name -> ExecutionStartedEvent.TagsEntry
+	117, // 19: ExecutionStartedEvent.orchestrationSpanID:type_name -> google.protobuf.StringValue
+	114, // 20: ExecutionStartedEvent.tags:type_name -> ExecutionStartedEvent.TagsEntry
 	0,   // 21: ExecutionCompletedEvent.orchestrationStatus:type_name -> OrchestrationStatus
-	113, // 22: ExecutionCompletedEvent.result:type_name -> google.protobuf.StringValue
+	117, // 22: ExecutionCompletedEvent.result:type_name -> google.protobuf.StringValue
 	7,   // 23: ExecutionCompletedEvent.failureDetails:type_name -> TaskFailureDetails
-	113, // 24: ExecutionTerminatedEvent.input:type_name -> google.protobuf.StringValue
-	113, // 25: TaskScheduledEvent.version:type_name -> google.protobuf.StringValue
-	113, // 26: TaskScheduledEvent.input:type_name -> google.protobuf.StringValue
+	117, // 24: ExecutionTerminatedEvent.input:type_name -> google.protobuf.StringValue
+	117, // 25: TaskScheduledEvent.version:type_name -> google.protobuf.StringValue
+	117, // 26: TaskScheduledEvent.input:type_name -> google.protobuf.StringValue
 	9,   // 27: TaskScheduledEvent.parentTraceContext:type_name -> TraceContext
-	113, // 28: TaskCompletedEvent.result:type_name -> google.protobuf.StringValue
+	117, // 28: TaskCompletedEvent.result:type_name -> google.protobuf.StringValue
 	7,   // 29: TaskFailedEvent.failureDetails:type_name -> TaskFailureDetails
-	113, // 30: SubOrchestrationInstanceCreatedEvent.version:type_name -> google.protobuf.StringValue
-	113, // 31: SubOrchestrationInstanceCreatedEvent.input:type_name -> google.protobuf.StringValue
+	117, // 30: SubOrchestrationInstanceCreatedEvent.version:type_name -> google.protobuf.StringValue
+	117, // 31: SubOrchestrationInstanceCreatedEvent.input:type_name -> google.protobuf.StringValue
 	9,   // 32: SubOrchestrationInstanceCreatedEvent.parentTraceContext:type_name -> TraceContext
-	113, // 33: SubOrchestrationInstanceCompletedEvent.result:type_name -> google.protobuf.StringValue
+	117, // 33: SubOrchestrationInstanceCompletedEvent.result:type_name -> google.protobuf.StringValue
 	7,   // 34: SubOrchestrationInstanceFailedEvent.failureDetails:type_name -> TaskFailureDetails
-	114, // 35: TimerCreatedEvent.fireAt:type_name -> google.protobuf.Timestamp
-	114, // 36: TimerFiredEvent.fireAt:type_name -> google.protobuf.Timestamp
-	113, // 37: EventSentEvent.input:type_name -> google.protobuf.StringValue
-	113, // 38: EventRaisedEvent.input:type_name -> google.protobuf.StringValue
-	113, // 39: GenericEvent.data:type_name -> google.protobuf.StringValue
+	118, // 35: TimerCreatedEvent.fireAt:type_name -> google.protobuf.Timestamp
+	118, // 36: TimerFiredEvent.fireAt:type_name -> google.protobuf.Timestamp
+	117, // 37: EventSentEvent.input:type_name -> google.protobuf.StringValue
+	117, // 38: EventRaisedEvent.input:type_name -> google.protobuf.StringValue
+	117, // 39: GenericEvent.data:type_name -> google.protobuf.StringValue
 	55,  // 40: HistoryStateEvent.orchestrationState:type_name -> OrchestrationState
-	113, // 41: ContinueAsNewEvent.input:type_name -> google.protobuf.StringValue
-	113, // 42: ExecutionSuspendedEvent.input:type_name -> google.protobuf.StringValue
-	113, // 43: ExecutionResumedEvent.input:type_name -> google.protobuf.StringValue
-	114, // 44: EntityOperationSignaledEvent.scheduledTime:type_name -> google.protobuf.Timestamp
-	113, // 45: EntityOperationSignaledEvent.input:type_name -> google.protobuf.StringValue
-	113, // 46: EntityOperationSignaledEvent.targetInstanceId:type_name -> google.protobuf.StringValue
-	114, // 47: EntityOperationCalledEvent.scheduledTime:type_name -> google.protobuf.Timestamp
-	113, // 48: EntityOperationCalledEvent.input:type_name -> google.protobuf.StringValue
-	113, // 49: EntityOperationCalledEvent.parentInstanceId:type_name -> google.protobuf.StringValue
-	113, // 50: EntityOperationCalledEvent.parentExecutionId:type_name -> google.protobuf.StringValue
-	113, // 51: EntityOperationCalledEvent.targetInstanceId:type_name -> google.protobuf.StringValue
-	113, // 52: EntityLockRequestedEvent.parentInstanceId:type_name -> google.protobuf.StringValue
-	113, // 53: EntityOperationCompletedEvent.output:type_name -> google.protobuf.StringValue
+	117, // 41: ContinueAsNewEvent.input:type_name -> google.protobuf.StringValue
+	117, // 42: ExecutionSuspendedEvent.input:type_name -> google.protobuf.StringValue
+	117, // 43: ExecutionResumedEvent.input:type_name -> google.protobuf.StringValue
+	118, // 44: EntityOperationSignaledEvent.scheduledTime:type_name -> google.protobuf.Timestamp
+	117, // 45: EntityOperationSignaledEvent.input:type_name -> google.protobuf.StringValue
+	117, // 46: EntityOperationSignaledEvent.targetInstanceId:type_name -> google.protobuf.StringValue
+	118, // 47: EntityOperationCalledEvent.scheduledTime:type_name -> google.protobuf.Timestamp
+	117, // 48: EntityOperationCalledEvent.input:type_name -> google.protobuf.StringValue
+	117, // 49: EntityOperationCalledEvent.parentInstanceId:type_name -> google.protobuf.StringValue
+	117, // 50: EntityOperationCalledEvent.parentExecutionId:type_name -> google.protobuf.StringValue
+	117, // 51: EntityOperationCalledEvent.targetInstanceId:type_name -> google.protobuf.StringValue
+	117, // 52: EntityLockRequestedEvent.parentInstanceId:type_name -> google.protobuf.StringValue
+	117, // 53: EntityOperationCompletedEvent.output:type_name -> google.protobuf.StringValue
 	7,   // 54: EntityOperationFailedEvent.failureDetails:type_name -> TaskFailureDetails
-	113, // 55: EntityUnlockSentEvent.parentInstanceId:type_name -> google.protobuf.StringValue
-	113, // 56: EntityUnlockSentEvent.targetInstanceId:type_name -> google.protobuf.StringValue
-	114, // 57: HistoryEvent.timestamp:type_name -> google.protobuf.Timestamp
+	117, // 55: EntityUnlockSentEvent.parentInstanceId:type_name -> google.protobuf.StringValue
+	117, // 56: EntityUnlockSentEvent.targetInstanceId:type_name -> google.protobuf.StringValue
+	118, // 57: HistoryEvent.timestamp:type_name -> google.protobuf.Timestamp
 	10,  // 58: HistoryEvent.executionStarted:type_name -> ExecutionStartedEvent
 	11,  // 59: HistoryEvent.executionCompleted:type_name -> ExecutionCompletedEvent
 	12,  // 60: HistoryEvent.executionTerminated:type_name -> ExecutionTerminatedEvent
@@ -9085,22 +9341,22 @@ var file_orchestrator_service_proto_depIdxs = []int32{
 	36,  // 83: HistoryEvent.entityLockGranted:type_name -> EntityLockGrantedEvent
 	35,  // 84: HistoryEvent.entityUnlockSent:type_name -> EntityUnlockSentEvent
 	3,   // 85: HistoryEvent.router:type_name -> TaskRouter
-	113, // 86: ScheduleTaskAction.version:type_name -> google.protobuf.StringValue
-	113, // 87: ScheduleTaskAction.input:type_name -> google.protobuf.StringValue
+	117, // 86: ScheduleTaskAction.version:type_name -> google.protobuf.StringValue
+	117, // 87: ScheduleTaskAction.input:type_name -> google.protobuf.StringValue
 	3,   // 88: ScheduleTaskAction.router:type_name -> TaskRouter
-	113, // 89: CreateSubOrchestrationAction.version:type_name -> google.protobuf.StringValue
-	113, // 90: CreateSubOrchestrationAction.input:type_name -> google.protobuf.StringValue
+	117, // 89: CreateSubOrchestrationAction.version:type_name -> google.protobuf.StringValue
+	117, // 90: CreateSubOrchestrationAction.input:type_name -> google.protobuf.StringValue
 	3,   // 91: CreateSubOrchestrationAction.router:type_name -> TaskRouter
-	114, // 92: CreateTimerAction.fireAt:type_name -> google.protobuf.Timestamp
+	118, // 92: CreateTimerAction.fireAt:type_name -> google.protobuf.Timestamp
 	4,   // 93: SendEventAction.instance:type_name -> OrchestrationInstance
-	113, // 94: SendEventAction.data:type_name -> google.protobuf.StringValue
+	117, // 94: SendEventAction.data:type_name -> google.protobuf.StringValue
 	0,   // 95: CompleteOrchestrationAction.orchestrationStatus:type_name -> OrchestrationStatus
-	113, // 96: CompleteOrchestrationAction.result:type_name -> google.protobuf.StringValue
-	113, // 97: CompleteOrchestrationAction.details:type_name -> google.protobuf.StringValue
-	113, // 98: CompleteOrchestrationAction.newVersion:type_name -> google.protobuf.StringValue
+	117, // 96: CompleteOrchestrationAction.result:type_name -> google.protobuf.StringValue
+	117, // 97: CompleteOrchestrationAction.details:type_name -> google.protobuf.StringValue
+	117, // 98: CompleteOrchestrationAction.newVersion:type_name -> google.protobuf.StringValue
 	37,  // 99: CompleteOrchestrationAction.carryoverEvents:type_name -> HistoryEvent
 	7,   // 100: CompleteOrchestrationAction.failureDetails:type_name -> TaskFailureDetails
-	113, // 101: TerminateOrchestrationAction.reason:type_name -> google.protobuf.StringValue
+	117, // 101: TerminateOrchestrationAction.reason:type_name -> google.protobuf.StringValue
 	30,  // 102: SendEntityMessageAction.entityOperationSignaled:type_name -> EntityOperationSignaledEvent
 	31,  // 103: SendEntityMessageAction.entityOperationCalled:type_name -> EntityOperationCalledEvent
 	32,  // 104: SendEntityMessageAction.entityLockRequested:type_name -> EntityLockRequestedEvent
@@ -9113,163 +9369,168 @@ var file_orchestrator_service_proto_depIdxs = []int32{
 	43,  // 111: OrchestratorAction.terminateOrchestration:type_name -> TerminateOrchestrationAction
 	44,  // 112: OrchestratorAction.sendEntityMessage:type_name -> SendEntityMessageAction
 	3,   // 113: OrchestratorAction.router:type_name -> TaskRouter
-	113, // 114: OrchestratorRequest.executionId:type_name -> google.protobuf.StringValue
+	117, // 114: OrchestratorRequest.executionId:type_name -> google.protobuf.StringValue
 	37,  // 115: OrchestratorRequest.pastEvents:type_name -> HistoryEvent
 	37,  // 116: OrchestratorRequest.newEvents:type_name -> HistoryEvent
 	84,  // 117: OrchestratorRequest.entityParameters:type_name -> OrchestratorEntityParameters
 	3,   // 118: OrchestratorRequest.router:type_name -> TaskRouter
 	45,  // 119: OrchestratorResponse.actions:type_name -> OrchestratorAction
-	113, // 120: OrchestratorResponse.customStatus:type_name -> google.protobuf.StringValue
-	115, // 121: OrchestratorResponse.numEventsProcessed:type_name -> google.protobuf.Int32Value
-	113, // 122: CreateInstanceRequest.version:type_name -> google.protobuf.StringValue
-	113, // 123: CreateInstanceRequest.input:type_name -> google.protobuf.StringValue
-	114, // 124: CreateInstanceRequest.scheduledStartTimestamp:type_name -> google.protobuf.Timestamp
+	117, // 120: OrchestratorResponse.customStatus:type_name -> google.protobuf.StringValue
+	119, // 121: OrchestratorResponse.numEventsProcessed:type_name -> google.protobuf.Int32Value
+	117, // 122: CreateInstanceRequest.version:type_name -> google.protobuf.StringValue
+	117, // 123: CreateInstanceRequest.input:type_name -> google.protobuf.StringValue
+	118, // 124: CreateInstanceRequest.scheduledStartTimestamp:type_name -> google.protobuf.Timestamp
 	49,  // 125: CreateInstanceRequest.orchestrationIdReusePolicy:type_name -> OrchestrationIdReusePolicy
-	113, // 126: CreateInstanceRequest.executionId:type_name -> google.protobuf.StringValue
-	111, // 127: CreateInstanceRequest.tags:type_name -> CreateInstanceRequest.TagsEntry
+	117, // 126: CreateInstanceRequest.executionId:type_name -> google.protobuf.StringValue
+	115, // 127: CreateInstanceRequest.tags:type_name -> CreateInstanceRequest.TagsEntry
 	9,   // 128: CreateInstanceRequest.parentTraceContext:type_name -> TraceContext
 	0,   // 129: OrchestrationIdReusePolicy.operationStatus:type_name -> OrchestrationStatus
 	1,   // 130: OrchestrationIdReusePolicy.action:type_name -> CreateOrchestrationAction
 	55,  // 131: GetInstanceResponse.orchestrationState:type_name -> OrchestrationState
-	113, // 132: RewindInstanceRequest.reason:type_name -> google.protobuf.StringValue
-	113, // 133: OrchestrationState.version:type_name -> google.protobuf.StringValue
+	117, // 132: RewindInstanceRequest.reason:type_name -> google.protobuf.StringValue
+	117, // 133: OrchestrationState.version:type_name -> google.protobuf.StringValue
 	0,   // 134: OrchestrationState.orchestrationStatus:type_name -> OrchestrationStatus
-	114, // 135: OrchestrationState.scheduledStartTimestamp:type_name -> google.protobuf.Timestamp
-	114, // 136: OrchestrationState.createdTimestamp:type_name -> google.protobuf.Timestamp
-	114, // 137: OrchestrationState.lastUpdatedTimestamp:type_name -> google.protobuf.Timestamp
-	113, // 138: OrchestrationState.input:type_name -> google.protobuf.StringValue
-	113, // 139: OrchestrationState.output:type_name -> google.protobuf.StringValue
-	113, // 140: OrchestrationState.customStatus:type_name -> google.protobuf.StringValue
+	118, // 135: OrchestrationState.scheduledStartTimestamp:type_name -> google.protobuf.Timestamp
+	118, // 136: OrchestrationState.createdTimestamp:type_name -> google.protobuf.Timestamp
+	118, // 137: OrchestrationState.lastUpdatedTimestamp:type_name -> google.protobuf.Timestamp
+	117, // 138: OrchestrationState.input:type_name -> google.protobuf.StringValue
+	117, // 139: OrchestrationState.output:type_name -> google.protobuf.StringValue
+	117, // 140: OrchestrationState.customStatus:type_name -> google.protobuf.StringValue
 	7,   // 141: OrchestrationState.failureDetails:type_name -> TaskFailureDetails
-	113, // 142: OrchestrationState.executionId:type_name -> google.protobuf.StringValue
-	114, // 143: OrchestrationState.completedTimestamp:type_name -> google.protobuf.Timestamp
-	113, // 144: OrchestrationState.parentInstanceId:type_name -> google.protobuf.StringValue
-	112, // 145: OrchestrationState.tags:type_name -> OrchestrationState.TagsEntry
-	113, // 146: RaiseEventRequest.input:type_name -> google.protobuf.StringValue
-	113, // 147: TerminateRequest.output:type_name -> google.protobuf.StringValue
-	113, // 148: SuspendRequest.reason:type_name -> google.protobuf.StringValue
-	113, // 149: ResumeRequest.reason:type_name -> google.protobuf.StringValue
+	117, // 142: OrchestrationState.executionId:type_name -> google.protobuf.StringValue
+	118, // 143: OrchestrationState.completedTimestamp:type_name -> google.protobuf.Timestamp
+	117, // 144: OrchestrationState.parentInstanceId:type_name -> google.protobuf.StringValue
+	116, // 145: OrchestrationState.tags:type_name -> OrchestrationState.TagsEntry
+	117, // 146: RaiseEventRequest.input:type_name -> google.protobuf.StringValue
+	117, // 147: TerminateRequest.output:type_name -> google.protobuf.StringValue
+	117, // 148: SuspendRequest.reason:type_name -> google.protobuf.StringValue
+	117, // 149: ResumeRequest.reason:type_name -> google.protobuf.StringValue
 	65,  // 150: QueryInstancesRequest.query:type_name -> InstanceQuery
 	0,   // 151: InstanceQuery.runtimeStatus:type_name -> OrchestrationStatus
-	114, // 152: InstanceQuery.createdTimeFrom:type_name -> google.protobuf.Timestamp
-	114, // 153: InstanceQuery.createdTimeTo:type_name -> google.protobuf.Timestamp
-	113, // 154: InstanceQuery.taskHubNames:type_name -> google.protobuf.StringValue
-	113, // 155: InstanceQuery.continuationToken:type_name -> google.protobuf.StringValue
-	113, // 156: InstanceQuery.instanceIdPrefix:type_name -> google.protobuf.StringValue
+	118, // 152: InstanceQuery.createdTimeFrom:type_name -> google.protobuf.Timestamp
+	118, // 153: InstanceQuery.createdTimeTo:type_name -> google.protobuf.Timestamp
+	117, // 154: InstanceQuery.taskHubNames:type_name -> google.protobuf.StringValue
+	117, // 155: InstanceQuery.continuationToken:type_name -> google.protobuf.StringValue
+	117, // 156: InstanceQuery.instanceIdPrefix:type_name -> google.protobuf.StringValue
 	55,  // 157: QueryInstancesResponse.orchestrationState:type_name -> OrchestrationState
-	113, // 158: QueryInstancesResponse.continuationToken:type_name -> google.protobuf.StringValue
+	117, // 158: QueryInstancesResponse.continuationToken:type_name -> google.protobuf.StringValue
 	68,  // 159: PurgeInstancesRequest.purgeInstanceFilter:type_name -> PurgeInstanceFilter
-	114, // 160: PurgeInstanceFilter.createdTimeFrom:type_name -> google.protobuf.Timestamp
-	114, // 161: PurgeInstanceFilter.createdTimeTo:type_name -> google.protobuf.Timestamp
+	118, // 160: PurgeInstanceFilter.createdTimeFrom:type_name -> google.protobuf.Timestamp
+	118, // 161: PurgeInstanceFilter.createdTimeTo:type_name -> google.protobuf.Timestamp
 	0,   // 162: PurgeInstanceFilter.runtimeStatus:type_name -> OrchestrationStatus
-	116, // 163: PurgeInstancesResponse.isComplete:type_name -> google.protobuf.BoolValue
-	113, // 164: SignalEntityRequest.input:type_name -> google.protobuf.StringValue
-	114, // 165: SignalEntityRequest.scheduledTime:type_name -> google.protobuf.Timestamp
+	120, // 163: PurgeInstancesResponse.isComplete:type_name -> google.protobuf.BoolValue
+	117, // 164: SignalEntityRequest.input:type_name -> google.protobuf.StringValue
+	118, // 165: SignalEntityRequest.scheduledTime:type_name -> google.protobuf.Timestamp
 	81,  // 166: GetEntityResponse.entity:type_name -> EntityMetadata
-	113, // 167: EntityQuery.instanceIdStartsWith:type_name -> google.protobuf.StringValue
-	114, // 168: EntityQuery.lastModifiedFrom:type_name -> google.protobuf.Timestamp
-	114, // 169: EntityQuery.lastModifiedTo:type_name -> google.protobuf.Timestamp
-	115, // 170: EntityQuery.pageSize:type_name -> google.protobuf.Int32Value
-	113, // 171: EntityQuery.continuationToken:type_name -> google.protobuf.StringValue
+	117, // 167: EntityQuery.instanceIdStartsWith:type_name -> google.protobuf.StringValue
+	118, // 168: EntityQuery.lastModifiedFrom:type_name -> google.protobuf.Timestamp
+	118, // 169: EntityQuery.lastModifiedTo:type_name -> google.protobuf.Timestamp
+	119, // 170: EntityQuery.pageSize:type_name -> google.protobuf.Int32Value
+	117, // 171: EntityQuery.continuationToken:type_name -> google.protobuf.StringValue
 	78,  // 172: QueryEntitiesRequest.query:type_name -> EntityQuery
 	81,  // 173: QueryEntitiesResponse.entities:type_name -> EntityMetadata
-	113, // 174: QueryEntitiesResponse.continuationToken:type_name -> google.protobuf.StringValue
-	114, // 175: EntityMetadata.lastModifiedTime:type_name -> google.protobuf.Timestamp
-	113, // 176: EntityMetadata.lockedBy:type_name -> google.protobuf.StringValue
-	113, // 177: EntityMetadata.serializedState:type_name -> google.protobuf.StringValue
-	113, // 178: CleanEntityStorageRequest.continuationToken:type_name -> google.protobuf.StringValue
-	113, // 179: CleanEntityStorageResponse.continuationToken:type_name -> google.protobuf.StringValue
-	117, // 180: OrchestratorEntityParameters.entityMessageReorderWindow:type_name -> google.protobuf.Duration
-	113, // 181: EntityBatchRequest.entityState:type_name -> google.protobuf.StringValue
+	117, // 174: QueryEntitiesResponse.continuationToken:type_name -> google.protobuf.StringValue
+	118, // 175: EntityMetadata.lastModifiedTime:type_name -> google.protobuf.Timestamp
+	117, // 176: EntityMetadata.lockedBy:type_name -> google.protobuf.StringValue
+	117, // 177: EntityMetadata.serializedState:type_name -> google.protobuf.StringValue
+	117, // 178: CleanEntityStorageRequest.continuationToken:type_name -> google.protobuf.StringValue
+	117, // 179: CleanEntityStorageResponse.continuationToken:type_name -> google.protobuf.StringValue
+	121, // 180: OrchestratorEntityParameters.entityMessageReorderWindow:type_name -> google.protobuf.Duration
+	117, // 181: EntityBatchRequest.entityState:type_name -> google.protobuf.StringValue
 	88,  // 182: EntityBatchRequest.operations:type_name -> OperationRequest
 	89,  // 183: EntityBatchResult.results:type_name -> OperationResult
 	93,  // 184: EntityBatchResult.actions:type_name -> OperationAction
-	113, // 185: EntityBatchResult.entityState:type_name -> google.protobuf.StringValue
+	117, // 185: EntityBatchResult.entityState:type_name -> google.protobuf.StringValue
 	7,   // 186: EntityBatchResult.failureDetails:type_name -> TaskFailureDetails
 	90,  // 187: EntityBatchResult.operationInfos:type_name -> OperationInfo
-	113, // 188: EntityRequest.entityState:type_name -> google.protobuf.StringValue
+	117, // 188: EntityRequest.entityState:type_name -> google.protobuf.StringValue
 	37,  // 189: EntityRequest.operationRequests:type_name -> HistoryEvent
-	113, // 190: OperationRequest.input:type_name -> google.protobuf.StringValue
+	117, // 190: OperationRequest.input:type_name -> google.protobuf.StringValue
 	91,  // 191: OperationResult.success:type_name -> OperationResultSuccess
 	92,  // 192: OperationResult.failure:type_name -> OperationResultFailure
 	4,   // 193: OperationInfo.responseDestination:type_name -> OrchestrationInstance
-	113, // 194: OperationResultSuccess.result:type_name -> google.protobuf.StringValue
+	117, // 194: OperationResultSuccess.result:type_name -> google.protobuf.StringValue
 	7,   // 195: OperationResultFailure.failureDetails:type_name -> TaskFailureDetails
 	94,  // 196: OperationAction.sendSignal:type_name -> SendSignalAction
 	95,  // 197: OperationAction.startNewOrchestration:type_name -> StartNewOrchestrationAction
-	113, // 198: SendSignalAction.input:type_name -> google.protobuf.StringValue
-	114, // 199: SendSignalAction.scheduledTime:type_name -> google.protobuf.Timestamp
-	113, // 200: StartNewOrchestrationAction.version:type_name -> google.protobuf.StringValue
-	113, // 201: StartNewOrchestrationAction.input:type_name -> google.protobuf.StringValue
-	114, // 202: StartNewOrchestrationAction.scheduledTime:type_name -> google.protobuf.Timestamp
+	117, // 198: SendSignalAction.input:type_name -> google.protobuf.StringValue
+	118, // 199: SendSignalAction.scheduledTime:type_name -> google.protobuf.Timestamp
+	117, // 200: StartNewOrchestrationAction.version:type_name -> google.protobuf.StringValue
+	117, // 201: StartNewOrchestrationAction.input:type_name -> google.protobuf.StringValue
+	118, // 202: StartNewOrchestrationAction.scheduledTime:type_name -> google.protobuf.Timestamp
 	2,   // 203: GetWorkItemsRequest.capabilities:type_name -> WorkerCapability
 	46,  // 204: WorkItem.orchestratorRequest:type_name -> OrchestratorRequest
 	5,   // 205: WorkItem.activityRequest:type_name -> ActivityRequest
 	85,  // 206: WorkItem.entityRequest:type_name -> EntityBatchRequest
 	105, // 207: WorkItem.healthPing:type_name -> HealthPing
 	87,  // 208: WorkItem.entityRequestV2:type_name -> EntityRequest
-	113, // 209: StreamInstanceHistoryRequest.executionId:type_name -> google.protobuf.StringValue
+	117, // 209: StreamInstanceHistoryRequest.executionId:type_name -> google.protobuf.StringValue
 	37,  // 210: HistoryChunk.events:type_name -> HistoryEvent
-	113, // 211: RerunWorkflowFromEventRequest.input:type_name -> google.protobuf.StringValue
-	118, // 212: TaskHubSidecarService.Hello:input_type -> google.protobuf.Empty
-	48,  // 213: TaskHubSidecarService.StartInstance:input_type -> CreateInstanceRequest
-	51,  // 214: TaskHubSidecarService.GetInstance:input_type -> GetInstanceRequest
-	53,  // 215: TaskHubSidecarService.RewindInstance:input_type -> RewindInstanceRequest
-	51,  // 216: TaskHubSidecarService.WaitForInstanceStart:input_type -> GetInstanceRequest
-	51,  // 217: TaskHubSidecarService.WaitForInstanceCompletion:input_type -> GetInstanceRequest
-	56,  // 218: TaskHubSidecarService.RaiseEvent:input_type -> RaiseEventRequest
-	58,  // 219: TaskHubSidecarService.TerminateInstance:input_type -> TerminateRequest
-	60,  // 220: TaskHubSidecarService.SuspendInstance:input_type -> SuspendRequest
-	62,  // 221: TaskHubSidecarService.ResumeInstance:input_type -> ResumeRequest
-	64,  // 222: TaskHubSidecarService.QueryInstances:input_type -> QueryInstancesRequest
-	67,  // 223: TaskHubSidecarService.PurgeInstances:input_type -> PurgeInstancesRequest
-	102, // 224: TaskHubSidecarService.GetWorkItems:input_type -> GetWorkItemsRequest
-	6,   // 225: TaskHubSidecarService.CompleteActivityTask:input_type -> ActivityResponse
-	47,  // 226: TaskHubSidecarService.CompleteOrchestratorTask:input_type -> OrchestratorResponse
-	86,  // 227: TaskHubSidecarService.CompleteEntityTask:input_type -> EntityBatchResult
-	106, // 228: TaskHubSidecarService.StreamInstanceHistory:input_type -> StreamInstanceHistoryRequest
-	70,  // 229: TaskHubSidecarService.CreateTaskHub:input_type -> CreateTaskHubRequest
-	72,  // 230: TaskHubSidecarService.DeleteTaskHub:input_type -> DeleteTaskHubRequest
-	74,  // 231: TaskHubSidecarService.SignalEntity:input_type -> SignalEntityRequest
-	76,  // 232: TaskHubSidecarService.GetEntity:input_type -> GetEntityRequest
-	79,  // 233: TaskHubSidecarService.QueryEntities:input_type -> QueryEntitiesRequest
-	82,  // 234: TaskHubSidecarService.CleanEntityStorage:input_type -> CleanEntityStorageRequest
-	96,  // 235: TaskHubSidecarService.AbandonTaskActivityWorkItem:input_type -> AbandonActivityTaskRequest
-	98,  // 236: TaskHubSidecarService.AbandonTaskOrchestratorWorkItem:input_type -> AbandonOrchestrationTaskRequest
-	100, // 237: TaskHubSidecarService.AbandonTaskEntityWorkItem:input_type -> AbandonEntityTaskRequest
-	108, // 238: TaskHubSidecarService.RerunWorkflowFromEvent:input_type -> RerunWorkflowFromEventRequest
-	118, // 239: TaskHubSidecarService.Hello:output_type -> google.protobuf.Empty
-	50,  // 240: TaskHubSidecarService.StartInstance:output_type -> CreateInstanceResponse
-	52,  // 241: TaskHubSidecarService.GetInstance:output_type -> GetInstanceResponse
-	54,  // 242: TaskHubSidecarService.RewindInstance:output_type -> RewindInstanceResponse
-	52,  // 243: TaskHubSidecarService.WaitForInstanceStart:output_type -> GetInstanceResponse
-	52,  // 244: TaskHubSidecarService.WaitForInstanceCompletion:output_type -> GetInstanceResponse
-	57,  // 245: TaskHubSidecarService.RaiseEvent:output_type -> RaiseEventResponse
-	59,  // 246: TaskHubSidecarService.TerminateInstance:output_type -> TerminateResponse
-	61,  // 247: TaskHubSidecarService.SuspendInstance:output_type -> SuspendResponse
-	63,  // 248: TaskHubSidecarService.ResumeInstance:output_type -> ResumeResponse
-	66,  // 249: TaskHubSidecarService.QueryInstances:output_type -> QueryInstancesResponse
-	69,  // 250: TaskHubSidecarService.PurgeInstances:output_type -> PurgeInstancesResponse
-	103, // 251: TaskHubSidecarService.GetWorkItems:output_type -> WorkItem
-	104, // 252: TaskHubSidecarService.CompleteActivityTask:output_type -> CompleteTaskResponse
-	104, // 253: TaskHubSidecarService.CompleteOrchestratorTask:output_type -> CompleteTaskResponse
-	104, // 254: TaskHubSidecarService.CompleteEntityTask:output_type -> CompleteTaskResponse
-	107, // 255: TaskHubSidecarService.StreamInstanceHistory:output_type -> HistoryChunk
-	71,  // 256: TaskHubSidecarService.CreateTaskHub:output_type -> CreateTaskHubResponse
-	73,  // 257: TaskHubSidecarService.DeleteTaskHub:output_type -> DeleteTaskHubResponse
-	75,  // 258: TaskHubSidecarService.SignalEntity:output_type -> SignalEntityResponse
-	77,  // 259: TaskHubSidecarService.GetEntity:output_type -> GetEntityResponse
-	80,  // 260: TaskHubSidecarService.QueryEntities:output_type -> QueryEntitiesResponse
-	83,  // 261: TaskHubSidecarService.CleanEntityStorage:output_type -> CleanEntityStorageResponse
-	97,  // 262: TaskHubSidecarService.AbandonTaskActivityWorkItem:output_type -> AbandonActivityTaskResponse
-	99,  // 263: TaskHubSidecarService.AbandonTaskOrchestratorWorkItem:output_type -> AbandonOrchestrationTaskResponse
-	101, // 264: TaskHubSidecarService.AbandonTaskEntityWorkItem:output_type -> AbandonEntityTaskResponse
-	109, // 265: TaskHubSidecarService.RerunWorkflowFromEvent:output_type -> RerunWorkflowFromEventResponse
-	239, // [239:266] is the sub-list for method output_type
-	212, // [212:239] is the sub-list for method input_type
-	212, // [212:212] is the sub-list for extension type_name
-	212, // [212:212] is the sub-list for extension extendee
-	0,   // [0:212] is the sub-list for field type_name
+	117, // 211: RerunWorkflowFromEventRequest.input:type_name -> google.protobuf.StringValue
+	37,  // 212: GetInstanceHistoryResponse.events:type_name -> HistoryEvent
+	122, // 213: TaskHubSidecarService.Hello:input_type -> google.protobuf.Empty
+	48,  // 214: TaskHubSidecarService.StartInstance:input_type -> CreateInstanceRequest
+	51,  // 215: TaskHubSidecarService.GetInstance:input_type -> GetInstanceRequest
+	53,  // 216: TaskHubSidecarService.RewindInstance:input_type -> RewindInstanceRequest
+	51,  // 217: TaskHubSidecarService.WaitForInstanceStart:input_type -> GetInstanceRequest
+	51,  // 218: TaskHubSidecarService.WaitForInstanceCompletion:input_type -> GetInstanceRequest
+	56,  // 219: TaskHubSidecarService.RaiseEvent:input_type -> RaiseEventRequest
+	58,  // 220: TaskHubSidecarService.TerminateInstance:input_type -> TerminateRequest
+	60,  // 221: TaskHubSidecarService.SuspendInstance:input_type -> SuspendRequest
+	62,  // 222: TaskHubSidecarService.ResumeInstance:input_type -> ResumeRequest
+	64,  // 223: TaskHubSidecarService.QueryInstances:input_type -> QueryInstancesRequest
+	67,  // 224: TaskHubSidecarService.PurgeInstances:input_type -> PurgeInstancesRequest
+	102, // 225: TaskHubSidecarService.GetWorkItems:input_type -> GetWorkItemsRequest
+	6,   // 226: TaskHubSidecarService.CompleteActivityTask:input_type -> ActivityResponse
+	47,  // 227: TaskHubSidecarService.CompleteOrchestratorTask:input_type -> OrchestratorResponse
+	86,  // 228: TaskHubSidecarService.CompleteEntityTask:input_type -> EntityBatchResult
+	106, // 229: TaskHubSidecarService.StreamInstanceHistory:input_type -> StreamInstanceHistoryRequest
+	70,  // 230: TaskHubSidecarService.CreateTaskHub:input_type -> CreateTaskHubRequest
+	72,  // 231: TaskHubSidecarService.DeleteTaskHub:input_type -> DeleteTaskHubRequest
+	74,  // 232: TaskHubSidecarService.SignalEntity:input_type -> SignalEntityRequest
+	76,  // 233: TaskHubSidecarService.GetEntity:input_type -> GetEntityRequest
+	79,  // 234: TaskHubSidecarService.QueryEntities:input_type -> QueryEntitiesRequest
+	82,  // 235: TaskHubSidecarService.CleanEntityStorage:input_type -> CleanEntityStorageRequest
+	96,  // 236: TaskHubSidecarService.AbandonTaskActivityWorkItem:input_type -> AbandonActivityTaskRequest
+	98,  // 237: TaskHubSidecarService.AbandonTaskOrchestratorWorkItem:input_type -> AbandonOrchestrationTaskRequest
+	100, // 238: TaskHubSidecarService.AbandonTaskEntityWorkItem:input_type -> AbandonEntityTaskRequest
+	108, // 239: TaskHubSidecarService.RerunWorkflowFromEvent:input_type -> RerunWorkflowFromEventRequest
+	110, // 240: TaskHubSidecarService.ListInstanceIDs:input_type -> ListInstanceIDsRequest
+	112, // 241: TaskHubSidecarService.GetInstanceHistory:input_type -> GetInstanceHistoryRequest
+	122, // 242: TaskHubSidecarService.Hello:output_type -> google.protobuf.Empty
+	50,  // 243: TaskHubSidecarService.StartInstance:output_type -> CreateInstanceResponse
+	52,  // 244: TaskHubSidecarService.GetInstance:output_type -> GetInstanceResponse
+	54,  // 245: TaskHubSidecarService.RewindInstance:output_type -> RewindInstanceResponse
+	52,  // 246: TaskHubSidecarService.WaitForInstanceStart:output_type -> GetInstanceResponse
+	52,  // 247: TaskHubSidecarService.WaitForInstanceCompletion:output_type -> GetInstanceResponse
+	57,  // 248: TaskHubSidecarService.RaiseEvent:output_type -> RaiseEventResponse
+	59,  // 249: TaskHubSidecarService.TerminateInstance:output_type -> TerminateResponse
+	61,  // 250: TaskHubSidecarService.SuspendInstance:output_type -> SuspendResponse
+	63,  // 251: TaskHubSidecarService.ResumeInstance:output_type -> ResumeResponse
+	66,  // 252: TaskHubSidecarService.QueryInstances:output_type -> QueryInstancesResponse
+	69,  // 253: TaskHubSidecarService.PurgeInstances:output_type -> PurgeInstancesResponse
+	103, // 254: TaskHubSidecarService.GetWorkItems:output_type -> WorkItem
+	104, // 255: TaskHubSidecarService.CompleteActivityTask:output_type -> CompleteTaskResponse
+	104, // 256: TaskHubSidecarService.CompleteOrchestratorTask:output_type -> CompleteTaskResponse
+	104, // 257: TaskHubSidecarService.CompleteEntityTask:output_type -> CompleteTaskResponse
+	107, // 258: TaskHubSidecarService.StreamInstanceHistory:output_type -> HistoryChunk
+	71,  // 259: TaskHubSidecarService.CreateTaskHub:output_type -> CreateTaskHubResponse
+	73,  // 260: TaskHubSidecarService.DeleteTaskHub:output_type -> DeleteTaskHubResponse
+	75,  // 261: TaskHubSidecarService.SignalEntity:output_type -> SignalEntityResponse
+	77,  // 262: TaskHubSidecarService.GetEntity:output_type -> GetEntityResponse
+	80,  // 263: TaskHubSidecarService.QueryEntities:output_type -> QueryEntitiesResponse
+	83,  // 264: TaskHubSidecarService.CleanEntityStorage:output_type -> CleanEntityStorageResponse
+	97,  // 265: TaskHubSidecarService.AbandonTaskActivityWorkItem:output_type -> AbandonActivityTaskResponse
+	99,  // 266: TaskHubSidecarService.AbandonTaskOrchestratorWorkItem:output_type -> AbandonOrchestrationTaskResponse
+	101, // 267: TaskHubSidecarService.AbandonTaskEntityWorkItem:output_type -> AbandonEntityTaskResponse
+	109, // 268: TaskHubSidecarService.RerunWorkflowFromEvent:output_type -> RerunWorkflowFromEventResponse
+	111, // 269: TaskHubSidecarService.ListInstanceIDs:output_type -> ListInstanceIDsResponse
+	113, // 270: TaskHubSidecarService.GetInstanceHistory:output_type -> GetInstanceHistoryResponse
+	242, // [242:271] is the sub-list for method output_type
+	213, // [213:242] is the sub-list for method input_type
+	213, // [213:213] is the sub-list for extension type_name
+	213, // [213:213] is the sub-list for extension extendee
+	0,   // [0:213] is the sub-list for field type_name
 }
 
 func init() { file_orchestrator_service_proto_init() }
@@ -10562,6 +10823,54 @@ func file_orchestrator_service_proto_init() {
 				return nil
 			}
 		}
+		file_orchestrator_service_proto_msgTypes[107].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListInstanceIDsRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_orchestrator_service_proto_msgTypes[108].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListInstanceIDsResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_orchestrator_service_proto_msgTypes[109].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetInstanceHistoryRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_orchestrator_service_proto_msgTypes[110].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetInstanceHistoryResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	file_orchestrator_service_proto_msgTypes[0].OneofWrappers = []interface{}{}
 	file_orchestrator_service_proto_msgTypes[5].OneofWrappers = []interface{}{}
@@ -10634,13 +10943,15 @@ func file_orchestrator_service_proto_init() {
 		(*WorkItem_EntityRequestV2)(nil),
 	}
 	file_orchestrator_service_proto_msgTypes[105].OneofWrappers = []interface{}{}
+	file_orchestrator_service_proto_msgTypes[107].OneofWrappers = []interface{}{}
+	file_orchestrator_service_proto_msgTypes[108].OneofWrappers = []interface{}{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_orchestrator_service_proto_rawDesc,
 			NumEnums:      3,
-			NumMessages:   110,
+			NumMessages:   114,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/api/protos/orchestrator_service_grpc.pb.go b/api/protos/orchestrator_service_grpc.pb.go
index 8898e91f..2d0e5d0c 100644
--- a/api/protos/orchestrator_service_grpc.pb.go
+++ b/api/protos/orchestrator_service_grpc.pb.go
@@ -4,7 +4,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.3.0
-// - protoc             v5.29.3
+// - protoc             v6.30.2
 // source: orchestrator_service.proto
 
 package protos
@@ -50,6 +50,8 @@ const (
 	TaskHubSidecarService_AbandonTaskOrchestratorWorkItem_FullMethodName = "/TaskHubSidecarService/AbandonTaskOrchestratorWorkItem"
 	TaskHubSidecarService_AbandonTaskEntityWorkItem_FullMethodName       = "/TaskHubSidecarService/AbandonTaskEntityWorkItem"
 	TaskHubSidecarService_RerunWorkflowFromEvent_FullMethodName          = "/TaskHubSidecarService/RerunWorkflowFromEvent"
+	TaskHubSidecarService_ListInstanceIDs_FullMethodName                 = "/TaskHubSidecarService/ListInstanceIDs"
+	TaskHubSidecarService_GetInstanceHistory_FullMethodName              = "/TaskHubSidecarService/GetInstanceHistory"
 )
 
 // TaskHubSidecarServiceClient is the client API for TaskHubSidecarService service.
@@ -104,6 +106,8 @@ type TaskHubSidecarServiceClient interface {
 	AbandonTaskEntityWorkItem(ctx context.Context, in *AbandonEntityTaskRequest, opts ...grpc.CallOption) (*AbandonEntityTaskResponse, error)
 	// Rerun a Workflow from a specific event ID of a workflow instance.
 	RerunWorkflowFromEvent(ctx context.Context, in *RerunWorkflowFromEventRequest, opts ...grpc.CallOption) (*RerunWorkflowFromEventResponse, error)
+	ListInstanceIDs(ctx context.Context, in *ListInstanceIDsRequest, opts ...grpc.CallOption) (*ListInstanceIDsResponse, error)
+	GetInstanceHistory(ctx context.Context, in *GetInstanceHistoryRequest, opts ...grpc.CallOption) (*GetInstanceHistoryResponse, error)
 }
 
 type taskHubSidecarServiceClient struct {
@@ -403,6 +407,24 @@ func (c *taskHubSidecarServiceClient) RerunWorkflowFromEvent(ctx context.Context
 	return out, nil
 }
 
+func (c *taskHubSidecarServiceClient) ListInstanceIDs(ctx context.Context, in *ListInstanceIDsRequest, opts ...grpc.CallOption) (*ListInstanceIDsResponse, error) {
+	out := new(ListInstanceIDsResponse)
+	err := c.cc.Invoke(ctx, TaskHubSidecarService_ListInstanceIDs_FullMethodName, in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *taskHubSidecarServiceClient) GetInstanceHistory(ctx context.Context, in *GetInstanceHistoryRequest, opts ...grpc.CallOption) (*GetInstanceHistoryResponse, error) {
+	out := new(GetInstanceHistoryResponse)
+	err := c.cc.Invoke(ctx, TaskHubSidecarService_GetInstanceHistory_FullMethodName, in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // TaskHubSidecarServiceServer is the server API for TaskHubSidecarService service.
 // All implementations must embed UnimplementedTaskHubSidecarServiceServer
 // for forward compatibility
@@ -455,6 +477,8 @@ type TaskHubSidecarServiceServer interface {
 	AbandonTaskEntityWorkItem(context.Context, *AbandonEntityTaskRequest) (*AbandonEntityTaskResponse, error)
 	// Rerun a Workflow from a specific event ID of a workflow instance.
 	RerunWorkflowFromEvent(context.Context, *RerunWorkflowFromEventRequest) (*RerunWorkflowFromEventResponse, error)
+	ListInstanceIDs(context.Context, *ListInstanceIDsRequest) (*ListInstanceIDsResponse, error)
+	GetInstanceHistory(context.Context, *GetInstanceHistoryRequest) (*GetInstanceHistoryResponse, error)
 	mustEmbedUnimplementedTaskHubSidecarServiceServer()
 }
 
@@ -543,6 +567,12 @@ func (UnimplementedTaskHubSidecarServiceServer) AbandonTaskEntityWorkItem(contex
 func (UnimplementedTaskHubSidecarServiceServer) RerunWorkflowFromEvent(context.Context, *RerunWorkflowFromEventRequest) (*RerunWorkflowFromEventResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method RerunWorkflowFromEvent not implemented")
 }
+func (UnimplementedTaskHubSidecarServiceServer) ListInstanceIDs(context.Context, *ListInstanceIDsRequest) (*ListInstanceIDsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListInstanceIDs not implemented")
+}
+func (UnimplementedTaskHubSidecarServiceServer) GetInstanceHistory(context.Context, *GetInstanceHistoryRequest) (*GetInstanceHistoryResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetInstanceHistory not implemented")
+}
 func (UnimplementedTaskHubSidecarServiceServer) mustEmbedUnimplementedTaskHubSidecarServiceServer() {}
 
 // UnsafeTaskHubSidecarServiceServer may be embedded to opt out of forward compatibility for this service.
@@ -1048,6 +1078,42 @@ func _TaskHubSidecarService_RerunWorkflowFromEvent_Handler(srv interface{}, ctx
 	return interceptor(ctx, in, info, handler)
 }
 
+func _TaskHubSidecarService_ListInstanceIDs_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListInstanceIDsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TaskHubSidecarServiceServer).ListInstanceIDs(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: TaskHubSidecarService_ListInstanceIDs_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TaskHubSidecarServiceServer).ListInstanceIDs(ctx, req.(*ListInstanceIDsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TaskHubSidecarService_GetInstanceHistory_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetInstanceHistoryRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TaskHubSidecarServiceServer).GetInstanceHistory(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: TaskHubSidecarService_GetInstanceHistory_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TaskHubSidecarServiceServer).GetInstanceHistory(ctx, req.(*GetInstanceHistoryRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // TaskHubSidecarService_ServiceDesc is the grpc.ServiceDesc for TaskHubSidecarService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -1155,6 +1221,14 @@ var TaskHubSidecarService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "RerunWorkflowFromEvent",
 			Handler:    _TaskHubSidecarService_RerunWorkflowFromEvent_Handler,
 		},
+		{
+			MethodName: "ListInstanceIDs",
+			Handler:    _TaskHubSidecarService_ListInstanceIDs_Handler,
+		},
+		{
+			MethodName: "GetInstanceHistory",
+			Handler:    _TaskHubSidecarService_GetInstanceHistory_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{
diff --git a/api/protos/runtime_state.pb.go b/api/protos/runtime_state.pb.go
index dffc0d31..e865c3ec 100644
--- a/api/protos/runtime_state.pb.go
+++ b/api/protos/runtime_state.pb.go
@@ -13,7 +13,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.32.0
-// 	protoc        v5.29.3
+// 	protoc        v6.30.2
 // source: runtime_state.proto
 
 package protos
diff --git a/backend/backend.go b/backend/backend.go
index 1a8aa20f..dc985623 100644
--- a/backend/backend.go
+++ b/backend/backend.go
@@ -33,6 +33,10 @@ type (
 	OrchestrationRuntimeState        = protos.OrchestrationRuntimeState
 	OrchestrationRuntimeStateMessage = protos.OrchestrationRuntimeStateMessage
 	RerunWorkflowFromEventRequest    = protos.RerunWorkflowFromEventRequest
+	ListInstanceIDsRequest           = protos.ListInstanceIDsRequest
+	ListInstanceIDsResponse          = protos.ListInstanceIDsResponse
+	GetInstanceHistoryRequest        = protos.GetInstanceHistoryRequest
+	GetInstanceHistoryResponse       = protos.GetInstanceHistoryResponse
 )
 
 type OrchestrationIdReusePolicyOptions func(*protos.OrchestrationIdReusePolicy) error
@@ -149,6 +153,13 @@ type Backend interface {
 	//
 	// [api.ErrTaskCancelled] is returned if the task was cancelled.
 	WaitForActivityCompletion(context.Context, *protos.ActivityRequest) (*protos.ActivityResponse, error)
+
+	// ListInstanceIDs lists orchestration instance IDs based on the provided
+	// query parameters.
+	ListInstanceIDs(ctx context.Context, req *protos.ListInstanceIDsRequest) (*protos.ListInstanceIDsResponse, error)
+
+	// GetInstanceHistory returns the full current history of a workflow instance.
+	GetInstanceHistory(ctx context.Context, req *protos.GetInstanceHistoryRequest) (*protos.GetInstanceHistoryResponse, error)
 }
 
 // MarshalHistoryEvent serializes the [HistoryEvent] into a protobuf byte array.
diff --git a/backend/executor.go b/backend/executor.go
index 5e9848de..3318cc01 100644
--- a/backend/executor.go
+++ b/backend/executor.go
@@ -545,6 +545,14 @@ func (g *grpcExecutor) RerunWorkflowFromEvent(ctx context.Context, req *protos.R
 	return &protos.RerunWorkflowFromEventResponse{NewInstanceID: newInstanceID.String()}, nil
 }
 
+func (g *grpcExecutor) ListInstanceIDs(ctx context.Context, req *protos.ListInstanceIDsRequest) (*protos.ListInstanceIDsResponse, error) {
+	return g.backend.ListInstanceIDs(ctx, req)
+}
+
+func (g *grpcExecutor) GetInstanceHistory(ctx context.Context, req *protos.GetInstanceHistoryRequest) (*protos.GetInstanceHistoryResponse, error) {
+	return g.backend.GetInstanceHistory(ctx, req)
+}
+
 // TerminateInstance implements protos.TaskHubSidecarServiceServer
 func (g *grpcExecutor) TerminateInstance(ctx context.Context, req *protos.TerminateRequest) (*protos.TerminateResponse, error) {
 	e := &protos.HistoryEvent{
@@ -674,4 +682,42 @@ func createGetInstanceResponse(req *protos.GetInstanceRequest, metadata *Orchest
 	return &protos.GetInstanceResponse{Exists: true, OrchestrationState: state}
 }
 
-func (grpcExecutor) mustEmbedUnimplementedTaskHubSidecarServiceServer() {}
+func (executor *grpcExecutor) AbandonTaskActivityWorkItem(ctx context.Context, in *protos.AbandonActivityTaskRequest) (*protos.AbandonActivityTaskResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) AbandonTaskEntityWorkItem(ctx context.Context, in *protos.AbandonEntityTaskRequest) (*protos.AbandonEntityTaskResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) AbandonTaskOrchestratorWorkItem(ctx context.Context, in *protos.AbandonOrchestrationTaskRequest) (*protos.AbandonOrchestrationTaskResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) CleanEntityStorage(ctx context.Context, in *protos.CleanEntityStorageRequest) (*protos.CleanEntityStorageResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) CompleteEntityTask(ctx context.Context, in *protos.EntityBatchResult) (*protos.CompleteTaskResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) GetEntity(ctx context.Context, in *protos.GetEntityRequest) (*protos.GetEntityResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) QueryEntities(ctx context.Context, in *protos.QueryEntitiesRequest) (*protos.QueryEntitiesResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) RewindInstance(ctx context.Context, in *protos.RewindInstanceRequest) (*protos.RewindInstanceResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) SignalEntity(ctx context.Context, in *protos.SignalEntityRequest) (*protos.SignalEntityResponse, error) {
+	return nil, nil
+}
+
+func (*grpcExecutor) StreamInstanceHistory(in *protos.StreamInstanceHistoryRequest, srv protos.TaskHubSidecarService_StreamInstanceHistoryServer) error {
+	return nil
+}
diff --git a/backend/postgres/postgres.go b/backend/postgres/postgres.go
index 057d5f8d..0784385d 100644
--- a/backend/postgres/postgres.go
+++ b/backend/postgres/postgres.go
@@ -845,17 +845,33 @@ func (be *postgresBackend) GetOrchestrationRuntimeState(ctx context.Context, wi
 		return nil, err
 	}
 
+	resp, err := be.GetInstanceHistory(ctx, &backend.GetInstanceHistoryRequest{
+		InstanceId: wi.InstanceID.String(),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	state := runtimestate.NewOrchestrationRuntimeState(string(wi.InstanceID), nil, resp.GetEvents())
+	return state, nil
+}
+
+func (be *postgresBackend) GetInstanceHistory(ctx context.Context, wi *backend.GetInstanceHistoryRequest) (*backend.GetInstanceHistoryResponse, error) {
+	if err := be.ensureDB(); err != nil {
+		return nil, err
+	}
+
 	rows, err := be.db.Query(
 		ctx,
 		"SELECT EventPayload FROM History WHERE InstanceID = $1 ORDER BY SequenceNumber ASC",
-		string(wi.InstanceID),
+		string(wi.InstanceId),
 	)
 	if err != nil {
 		return nil, err
 	}
 	defer rows.Close()
 
-	existingEvents := make([]*protos.HistoryEvent, 0, 50)
+	events := make([]*protos.HistoryEvent, 0, 50)
 	for rows.Next() {
 		var eventPayload []byte
 		if err := rows.Scan(&eventPayload); err != nil {
@@ -867,11 +883,38 @@ func (be *postgresBackend) GetOrchestrationRuntimeState(ctx context.Context, wi
 			return nil, err
 		}
 
-		existingEvents = append(existingEvents, e)
+		events = append(events, e)
 	}
 
-	state := runtimestate.NewOrchestrationRuntimeState(string(wi.InstanceID), nil, existingEvents)
-	return state, nil
+	return &backend.GetInstanceHistoryResponse{
+		Events: events,
+	}, nil
+}
+
+func (be *postgresBackend) ListInstanceIDs(ctx context.Context, wi *backend.ListInstanceIDsRequest) (*backend.ListInstanceIDsResponse, error) {
+	if err := be.ensureDB(); err != nil {
+		return nil, err
+	}
+
+	rows, err := be.db.Query(ctx, "SELECT InstanceID FROM Instances ORDER BY SequenceNumber ASC")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	ids := make([]string, 0, 50)
+	for rows.Next() {
+		var id string
+		if err := rows.Scan(&id); err != nil {
+			return nil, fmt.Errorf("failed to read instance ID: %w", err)
+		}
+
+		ids = append(ids, id)
+	}
+
+	return &backend.ListInstanceIDsResponse{
+		InstanceIds: ids,
+	}, nil
 }
 
 // GetOrchestrationWorkItem implements backend.Backend
diff --git a/backend/sqlite/sqlite.go b/backend/sqlite/sqlite.go
index 4879757a..65a98488 100644
--- a/backend/sqlite/sqlite.go
+++ b/backend/sqlite/sqlite.go
@@ -1112,3 +1112,64 @@ func (be *sqliteBackend) String() string {
 func (be *sqliteBackend) RerunWorkflowFromEvent(ctx context.Context, req *backend.RerunWorkflowFromEventRequest) (api.InstanceID, error) {
 	return "", status.Error(codes.Unimplemented, "not implemented")
 }
+
+func (be *sqliteBackend) GetInstanceHistory(ctx context.Context, wi *backend.GetInstanceHistoryRequest) (*backend.GetInstanceHistoryResponse, error) {
+	if err := be.ensureDB(); err != nil {
+		return nil, err
+	}
+
+	rows, err := be.db.QueryContext(
+		ctx,
+		"SELECT [EventPayload] FROM History WHERE [InstanceID] = ? ORDER BY [SequenceNumber] ASC",
+		string(wi.InstanceId),
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	events := make([]*protos.HistoryEvent, 0, 50)
+	for rows.Next() {
+		var eventPayload []byte
+		if err := rows.Scan(&eventPayload); err != nil {
+			return nil, fmt.Errorf("failed to read history event: %w", err)
+		}
+
+		e, err := backend.UnmarshalHistoryEvent(eventPayload)
+		if err != nil {
+			return nil, err
+		}
+
+		events = append(events, e)
+	}
+
+	return &backend.GetInstanceHistoryResponse{
+		Events: events,
+	}, nil
+}
+
+func (be *sqliteBackend) ListInstanceIDs(ctx context.Context, wi *backend.ListInstanceIDsRequest) (*backend.ListInstanceIDsResponse, error) {
+	if err := be.ensureDB(); err != nil {
+		return nil, err
+	}
+
+	rows, err := be.db.QueryContext(ctx, "SELECT [InstanceID] FROM Instances")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	ids := make([]string, 0, 50)
+	for rows.Next() {
+		var id string
+		if err := rows.Scan(&id); err != nil {
+			return nil, fmt.Errorf("failed to read instance ID: %w", err)
+		}
+
+		ids = append(ids, id)
+	}
+
+	return &backend.ListInstanceIDsResponse{
+		InstanceIds: ids,
+	}, nil
+}
diff --git a/client/client_grpc.go b/client/client_grpc.go
index dce162bd..4c716e33 100644
--- a/client/client_grpc.go
+++ b/client/client_grpc.go
@@ -12,6 +12,7 @@ import (
 	"github.com/dapr/durabletask-go/api"
 	"github.com/dapr/durabletask-go/api/protos"
 	"github.com/dapr/durabletask-go/backend"
+	"github.com/dapr/kit/ptr"
 )
 
 // REVIEW: Can this be merged with backend/client.go somehow?
@@ -236,6 +237,46 @@ func (c *TaskHubGrpcClient) RerunWorkflowFromEvent(ctx context.Context, id api.I
 	return api.InstanceID(resp.GetNewInstanceID()), nil
 }
 
+func (c *TaskHubGrpcClient) ListInstanceIDs(ctx context.Context, opts ...api.ListInstanceIDsOptions) (*backend.ListInstanceIDsResponse, error) {
+	req := protos.ListInstanceIDsRequest{
+		PageSize: ptr.Of(uint32(1024)),
+	}
+
+	for _, configure := range opts {
+		configure(&req)
+	}
+
+	resp, err := c.client.ListInstanceIDs(ctx, &req)
+	if err != nil {
+		if ctx.Err() != nil {
+			return nil, ctx.Err()
+		}
+		return nil, fmt.Errorf("failed to list instance IDs: %w", err)
+	}
+
+	return resp, nil
+}
+
+func (c *TaskHubGrpcClient) GetInstanceHistory(ctx context.Context, id api.InstanceID, opts ...api.GetInstanceHistoryOptions) (*backend.GetInstanceHistoryResponse, error) {
+	req := protos.GetInstanceHistoryRequest{
+		InstanceId: id.String(),
+	}
+
+	for _, configure := range opts {
+		configure(&req)
+	}
+
+	resp, err := c.client.GetInstanceHistory(ctx, &req)
+	if err != nil {
+		if ctx.Err() != nil {
+			return nil, ctx.Err()
+		}
+		return nil, fmt.Errorf("failed to get instance history: %w", err)
+	}
+
+	return resp, nil
+}
+
 func makeGetInstanceRequest(id api.InstanceID, opts []api.FetchOrchestrationMetadataOptions) *protos.GetInstanceRequest {
 	req := &protos.GetInstanceRequest{
 		InstanceId:          string(id),
diff --git a/samples/azurefunctions/middleware.go b/samples/azurefunctions/middleware.go
index d48bd3c4..995b4d35 100644
--- a/samples/azurefunctions/middleware.go
+++ b/samples/azurefunctions/middleware.go
@@ -68,9 +68,9 @@ func MapOrchestrator(o task.Orchestrator) func(http.ResponseWriter, *http.Reques
 			fmt.Printf("ERROR: Unexpected failure executing the orchestrator function: %v\n", err)
 			return
 		}
-		fmt.Printf("Orchestrator returned a response: %v\n", results.Response)
+		fmt.Printf("Orchestrator returned a response: %v\n", results)
 
-		respBytes, err := proto.Marshal(results.Response)
+		respBytes, err := proto.Marshal(results)
 		if err != nil {
 			fmt.Printf("ERROR: Failed to marshal orchestrator results to protobuf: %v\n", err)
 			return
diff --git a/submodules/durabletask-protobuf b/submodules/durabletask-protobuf
index 39d5b4fb..5d4bd98e 160000
--- a/submodules/durabletask-protobuf
+++ b/submodules/durabletask-protobuf
@@ -1 +1 @@
-Subproject commit 39d5b4fbe70debd7a2a6b4ca1ce439ee471def71
+Subproject commit 5d4bd98e41785e1e15e8b6b9715fd46bd9516d0e
diff --git a/tests/grpc/grpc_test.go b/tests/grpc/grpc_test.go
index 0e7e7bfd..a413c9a3 100644
--- a/tests/grpc/grpc_test.go
+++ b/tests/grpc/grpc_test.go
@@ -7,6 +7,7 @@ import (
 	"log"
 	"net"
 	"os"
+	"strconv"
 	"testing"
 	"time"
 
@@ -540,3 +541,51 @@ func Test_SingleActivity_TaskSpan(t *testing.T) {
 	// assert child-parent relationship
 	assert.Equal(t, spans[1].Parent().SpanID(), spans[2].SpanContext().SpanID())
 }
+
+func Test_Grpc_ListInstanceIDs(t *testing.T) {
+	r := task.NewTaskRegistry()
+	r.AddOrchestratorN("foo", func(ctx *task.OrchestrationContext) (any, error) {
+		return 42, nil
+	})
+
+	cancelListener := startGrpcListener(t, r)
+	defer cancelListener()
+
+	for i := range 5 {
+		_, err := grpcClient.ScheduleNewOrchestration(ctx, "foo", api.WithInstanceID(api.InstanceID(strconv.Itoa(i))))
+		require.NoError(t, err)
+	}
+
+	resp, err := grpcClient.ListInstanceIDs(ctx)
+	require.NoError(t, err)
+	assert.Subset(t, resp.InstanceIds, []string{"0", "1", "2", "3", "4"})
+}
+
+func Test_Grpc_GetInstanceHistory(t *testing.T) {
+	r := task.NewTaskRegistry()
+	r.AddOrchestratorN("foo", func(ctx *task.OrchestrationContext) (any, error) {
+		if err := ctx.CallActivity("bar").Await(nil); err != nil {
+			return nil, err
+		}
+		if err := ctx.CallActivity("bar").Await(nil); err != nil {
+			return nil, err
+		}
+		if err := ctx.CallActivity("bar").Await(nil); err != nil {
+			return nil, err
+		}
+		return 42, nil
+	})
+	r.AddActivityN("bar", func(ctx task.ActivityContext) (any, error) {
+		return 42, nil
+	})
+
+	cancelListener := startGrpcListener(t, r)
+	defer cancelListener()
+
+	id, err := grpcClient.ScheduleNewOrchestration(ctx, "foo")
+	require.NoError(t, err)
+
+	resp, err := grpcClient.GetInstanceHistory(ctx, id)
+	require.NoError(t, err)
+	require.Len(t, resp.Events, 12)
+}
diff --git a/tests/mocks/Backend.go b/tests/mocks/Backend.go
index 14137a63..237d36ca 100644
--- a/tests/mocks/Backend.go
+++ b/tests/mocks/Backend.go
@@ -605,6 +605,65 @@ func (_c *Backend_DeleteTaskHub_Call) RunAndReturn(run func(context.Context) err
 	return _c
 }
 
+// GetInstanceHistory provides a mock function with given fields: ctx, req
+func (_m *Backend) GetInstanceHistory(ctx context.Context, req *protos.GetInstanceHistoryRequest) (*protos.GetInstanceHistoryResponse, error) {
+	ret := _m.Called(ctx, req)
+
+	if len(ret) == 0 {
+		panic("no return value specified for GetInstanceHistory")
+	}
+
+	var r0 *protos.GetInstanceHistoryResponse
+	var r1 error
+	if rf, ok := ret.Get(0).(func(context.Context, *protos.GetInstanceHistoryRequest) (*protos.GetInstanceHistoryResponse, error)); ok {
+		return rf(ctx, req)
+	}
+	if rf, ok := ret.Get(0).(func(context.Context, *protos.GetInstanceHistoryRequest) *protos.GetInstanceHistoryResponse); ok {
+		r0 = rf(ctx, req)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*protos.GetInstanceHistoryResponse)
+		}
+	}
+
+	if rf, ok := ret.Get(1).(func(context.Context, *protos.GetInstanceHistoryRequest) error); ok {
+		r1 = rf(ctx, req)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// Backend_GetInstanceHistory_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetInstanceHistory'
+type Backend_GetInstanceHistory_Call struct {
+	*mock.Call
+}
+
+// GetInstanceHistory is a helper method to define mock.On call
+//   - ctx context.Context
+//   - req *protos.GetInstanceHistoryRequest
+func (_e *Backend_Expecter) GetInstanceHistory(ctx interface{}, req interface{}) *Backend_GetInstanceHistory_Call {
+	return &Backend_GetInstanceHistory_Call{Call: _e.mock.On("GetInstanceHistory", ctx, req)}
+}
+
+func (_c *Backend_GetInstanceHistory_Call) Run(run func(ctx context.Context, req *protos.GetInstanceHistoryRequest)) *Backend_GetInstanceHistory_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(context.Context), args[1].(*protos.GetInstanceHistoryRequest))
+	})
+	return _c
+}
+
+func (_c *Backend_GetInstanceHistory_Call) Return(_a0 *protos.GetInstanceHistoryResponse, _a1 error) *Backend_GetInstanceHistory_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+func (_c *Backend_GetInstanceHistory_Call) RunAndReturn(run func(context.Context, *protos.GetInstanceHistoryRequest) (*protos.GetInstanceHistoryResponse, error)) *Backend_GetInstanceHistory_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
 // GetOrchestrationMetadata provides a mock function with given fields: _a0, _a1
 func (_m *Backend) GetOrchestrationMetadata(_a0 context.Context, _a1 api.InstanceID) (*protos.OrchestrationMetadata, error) {
 	ret := _m.Called(_a0, _a1)
@@ -723,6 +782,65 @@ func (_c *Backend_GetOrchestrationRuntimeState_Call) RunAndReturn(run func(conte
 	return _c
 }
 
+// ListInstanceIDs provides a mock function with given fields: ctx, req
+func (_m *Backend) ListInstanceIDs(ctx context.Context, req *protos.ListInstanceIDsRequest) (*protos.ListInstanceIDsResponse, error) {
+	ret := _m.Called(ctx, req)
+
+	if len(ret) == 0 {
+		panic("no return value specified for ListInstanceIDs")
+	}
+
+	var r0 *protos.ListInstanceIDsResponse
+	var r1 error
+	if rf, ok := ret.Get(0).(func(context.Context, *protos.ListInstanceIDsRequest) (*protos.ListInstanceIDsResponse, error)); ok {
+		return rf(ctx, req)
+	}
+	if rf, ok := ret.Get(0).(func(context.Context, *protos.ListInstanceIDsRequest) *protos.ListInstanceIDsResponse); ok {
+		r0 = rf(ctx, req)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*protos.ListInstanceIDsResponse)
+		}
+	}
+
+	if rf, ok := ret.Get(1).(func(context.Context, *protos.ListInstanceIDsRequest) error); ok {
+		r1 = rf(ctx, req)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// Backend_ListInstanceIDs_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'ListInstanceIDs'
+type Backend_ListInstanceIDs_Call struct {
+	*mock.Call
+}
+
+// ListInstanceIDs is a helper method to define mock.On call
+//   - ctx context.Context
+//   - req *protos.ListInstanceIDsRequest
+func (_e *Backend_Expecter) ListInstanceIDs(ctx interface{}, req interface{}) *Backend_ListInstanceIDs_Call {
+	return &Backend_ListInstanceIDs_Call{Call: _e.mock.On("ListInstanceIDs", ctx, req)}
+}
+
+func (_c *Backend_ListInstanceIDs_Call) Run(run func(ctx context.Context, req *protos.ListInstanceIDsRequest)) *Backend_ListInstanceIDs_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(context.Context), args[1].(*protos.ListInstanceIDsRequest))
+	})
+	return _c
+}
+
+func (_c *Backend_ListInstanceIDs_Call) Return(_a0 *protos.ListInstanceIDsResponse, _a1 error) *Backend_ListInstanceIDs_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+func (_c *Backend_ListInstanceIDs_Call) RunAndReturn(run func(context.Context, *protos.ListInstanceIDsRequest) (*protos.ListInstanceIDsResponse, error)) *Backend_ListInstanceIDs_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
 // NextActivityWorkItem provides a mock function with given fields: _a0
 func (_m *Backend) NextActivityWorkItem(_a0 context.Context) (*backend.ActivityWorkItem, error) {
 	ret := _m.Called(_a0)
diff --git a/workflow/api.go b/workflow/api.go
index 97ad2b34..7702f866 100644
--- a/workflow/api.go
+++ b/workflow/api.go
@@ -15,6 +15,8 @@ type RaiseEventOptions api.RaiseEventOptions
 type TerminateOptions api.TerminateOptions
 type PurgeOptions api.PurgeOptions
 type RerunOptions api.RerunOptions
+type ListInstanceIDsOptions api.ListInstanceIDsOptions
+type GetInstanceHistoryOptions api.GetInstanceHistoryOptions
 
 // WithInstanceID configures an explicit workflow instance ID. If not
 // specified, a random UUID value will be used for the workflow instance ID.
@@ -99,3 +101,11 @@ func WithRerunInput(input any) RerunOptions {
 func WithRerunNewInstanceID(id string) RerunOptions {
 	return RerunOptions(api.WithRerunNewInstanceID(api.InstanceID(id)))
 }
+
+func WithListInstanceIDsPageSize(pageSize uint32) ListInstanceIDsOptions {
+	return ListInstanceIDsOptions(api.WithListInstanceIDsPageSize(pageSize))
+}
+
+func WithListInstanceIDsContinuationToken(token string) ListInstanceIDsOptions {
+	return ListInstanceIDsOptions(api.WithListInstanceIDsContinuationToken(token))
+}
diff --git a/workflow/client.go b/workflow/client.go
index 11311cde..571a7d9d 100644
--- a/workflow/client.go
+++ b/workflow/client.go
@@ -144,3 +144,29 @@ func (c *Client) RerunWorkflowFromEvent(ctx context.Context, id string, eventID
 	newID, err := c.thgc.RerunWorkflowFromEvent(ctx, api.InstanceID(id), eventID, oops...)
 	return string(newID), err
 }
+
+func (c *Client) ListInstanceIDs(ctx context.Context, opts ...ListInstanceIDsOptions) (*ListInstanceIDsResponse, error) {
+	oops := make([]api.ListInstanceIDsOptions, len(opts))
+	for i, o := range opts {
+		oops[i] = api.ListInstanceIDsOptions(o)
+	}
+	resp, err := c.thgc.ListInstanceIDs(ctx, oops...)
+	if err != nil {
+		return nil, err
+	}
+
+	return (*ListInstanceIDsResponse)(resp), nil
+}
+
+func (c *Client) GetInstanceHistory(ctx context.Context, id string, opts ...GetInstanceHistoryOptions) (*GetInstanceHistoryResponse, error) {
+	oops := make([]api.GetInstanceHistoryOptions, len(opts))
+	for i, o := range opts {
+		oops[i] = api.GetInstanceHistoryOptions(o)
+	}
+	resp, err := c.thgc.GetInstanceHistory(ctx, api.InstanceID(id), oops...)
+	if err != nil {
+		return nil, err
+	}
+
+	return (*GetInstanceHistoryResponse)(resp), nil
+}
diff --git a/workflow/state.go b/workflow/state.go
index d463f669..5387f04f 100644
--- a/workflow/state.go
+++ b/workflow/state.go
@@ -17,6 +17,8 @@ const (
 )
 
 type WorkflowMetadata protos.OrchestrationMetadata
+type ListInstanceIDsResponse protos.ListInstanceIDsResponse
+type GetInstanceHistoryResponse protos.GetInstanceHistoryResponse
 
 func (w WorkflowMetadata) String() string {
 	switch w.RuntimeStatus {