/services/campaign_service.proto

--- v18/services/campaign_service.proto 2025-08-05 14:36:14.000000000 +0000
+++ v19/services/campaign_service.proto 2025-08-05 14:36:21.000000000 +0000
@@ -82,7 +82,31 @@
   rpc MutateCampaigns(MutateCampaignsRequest)
       returns (MutateCampaignsResponse) {
     option (google.api.http) = {
-      post: "/v18/customers/{customer_id=*}/campaigns:mutate"
+      post: "/v19/customers/{customer_id=*}/campaigns:mutate"
+      body: "*"
+    };
+    option (google.api.method_signature) = "customer_id,operations";
+  }
+
+  // Enables Brand Guidelines for Performance Max campaigns.
+  //
+  // List of thrown errors:
+  //   [AuthenticationError]()
+  //   [AssetError]()
+  //   [AssetLinkError]()
+  //   [AuthorizationError]()
+  //   [BrandGuidelinesMigrationError]()
+  //   [CampaignError]()
+  //   [HeaderError]()
+  //   [InternalError]()
+  //   [MutateError]()
+  //   [QuotaError]()
+  //   [RequestError]()
+  //   [ResourceCountLimitExceededError]()
+  rpc EnablePMaxBrandGuidelines(EnablePMaxBrandGuidelinesRequest)
+      returns (EnablePMaxBrandGuidelinesResponse) {
+    option (google.api.http) = {
+      post: "/v19/customers/{customer_id=*}/campaigns:enablePMaxBrandGuidelines"
       body: "*"
     };
     option (google.api.method_signature) = "customer_id,operations";
@@ -160,5 +184,84 @@

   // The mutated campaign with only mutable fields after mutate. The field will
   // only be returned when response_content_type is set to "MUTABLE_RESOURCE".
-  google.ads.googleads.v18.resources.Campaign campaign = 2;
+  google.ads.googleads.v19.resources.Campaign campaign = 2;
+}
+
+// Request to enable Brand Guidelines for a Performance Max campaign.
+message EnablePMaxBrandGuidelinesRequest {
+  // Required. The ID of the customer whose campaigns are being enabled.
+  string customer_id = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The list of individual campaign operations. A maximum of 10
+  // enable operations can be executed in a request.
+  repeated EnableOperation operations = 2
+      [(google.api.field_behavior) = REQUIRED];
+}
+
+// A single enable operation of a campaign.
+message EnableOperation {
+  // Required. The resource name of the campaign to enable.
+  string campaign = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "googleads.googleapis.com/Campaign"
+    }
+  ];
+
+  // Required. The switch to automatically populate top-performing brand assets.
+  // This field is required. If true, top-performing brand assets will be
+  // automatically populated. If false, the brand_assets field is required.
+  bool auto_populate_brand_assets = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Optional. The brand assets linked to the campaign. This field is required
+  // when the value of auto_populate_brand_assets is false.
+  BrandCampaignAssets brand_assets = 3 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. The domain of the final uri.
+  string final_uri_domain = 4 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. Hex code representation of the main brand color, for example
+  // #00ff00. main_color is required when accent color is specified.
+  string main_color = 5 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. Hex code representation of the accent brand color, for example
+  // #00ff00. accent_color is required when main_color is specified.
+  string accent_color = 6 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. The font family is specified as a string, and must be one of the
+  // following: "Open Sans", "Roboto", "Roboto Slab", "Montserrat", "Poppins",
+  // "Lato", "Oswald", or "Playfair Display".
+  string font_family = 7 [(google.api.field_behavior) = OPTIONAL];
+}
+
+// Assets linked at the campaign level.
+// A business_name and at least one logo_asset are required.
+message BrandCampaignAssets {
+  // Required. The resource name of the business name text asset.
+  string business_name_asset = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // Required. The resource name of square logo assets.
+  repeated string logo_asset = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Optional. The resource name of landscape logo assets.
+  repeated string landscape_logo_asset = 3
+      [(google.api.field_behavior) = OPTIONAL];
+}
+
+// Brand Guidelines campaign enablement response.
+message EnablePMaxBrandGuidelinesResponse {
+  // Campaign enablement results per campaign.
+  repeated EnablementResult results = 1;
+}
+
+// A single enablement result of a campaign.
+message EnablementResult {
+  // This indicates the campaign for which enablement was tried, regardless of
+  // the outcome.
+  string campaign = 1 [(google.api.resource_reference) = {
+    type: "googleads.googleapis.com/Campaign"
+  }];
+
+  // Details of the error when enablement fails.
+  google.rpc.Status enablement_error = 2;
 }