diff --git a/clients/google-api-services-retail/v2alpha/2.0.0/README.md b/clients/google-api-services-retail/v2alpha/2.0.0/README.md
index 0cba77fcd33..4d8e96fed85 100644
--- a/clients/google-api-services-retail/v2alpha/2.0.0/README.md
+++ b/clients/google-api-services-retail/v2alpha/2.0.0/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-retail</artifactId>
-      <version>v2alpha-rev20260813-2.0.0</version>
+      <version>v2alpha-rev20260826-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-retail:v2alpha-rev20260813-2.0.0'
+  implementation 'com.google.apis:google-api-services-retail:v2alpha-rev20260826-2.0.0'
 }
 ```
 
diff --git a/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponse.java b/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponse.java
index 4efc6f903b7..17979a9aab9 100644
--- a/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponse.java
+++ b/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponse.java
@@ -30,6 +30,14 @@
 @SuppressWarnings("javadoc")
 public final class GoogleCloudRetailV2alphaCompleteQueryResponse extends com.google.api.client.json.GenericJson {
 
+  /**
+   * Conversational prompts to trigger agents like Shopping Agent. This is an experimental feature
+   * for select customers.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt> agentPrompts;
+
   /**
    * A map of matched attribute suggestions. This field is only available for `cloud-retail`
    * dataset. Current supported keys: * `brands` * `categories`
@@ -68,6 +76,25 @@ public final class GoogleCloudRetailV2alphaCompleteQueryResponse extends com.goo
   @com.google.api.client.util.Key
   private java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseRecentSearchResult> recentSearchResults;
 
+  /**
+   * Conversational prompts to trigger agents like Shopping Agent. This is an experimental feature
+   * for select customers.
+   * @return value or {@code null} for none
+   */
+  public java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt> getAgentPrompts() {
+    return agentPrompts;
+  }
+
+  /**
+   * Conversational prompts to trigger agents like Shopping Agent. This is an experimental feature
+   * for select customers.
+   * @param agentPrompts agentPrompts or {@code null} for none
+   */
+  public GoogleCloudRetailV2alphaCompleteQueryResponse setAgentPrompts(java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt> agentPrompts) {
+    this.agentPrompts = agentPrompts;
+    return this;
+  }
+
   /**
    * A map of matched attribute suggestions. This field is only available for `cloud-retail`
    * dataset. Current supported keys: * `brands` * `categories`
diff --git a/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt.java b/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt.java
similarity index 74%
rename from clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt.java
rename to clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt.java
index 9a9b3c64020..0d80c765346 100644
--- a/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt.java
+++ b/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt.java
@@ -28,7 +28,7 @@
  * @author Google, Inc.
  */
 @SuppressWarnings("javadoc")
-public final class GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt extends com.google.api.client.json.GenericJson {
+public final class GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt extends com.google.api.client.json.GenericJson {
 
   /**
    * The conversational prompt string.
@@ -49,19 +49,19 @@ public java.lang.String getPrompt() {
    * The conversational prompt string.
    * @param prompt prompt or {@code null} for none
    */
-  public GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt setPrompt(java.lang.String prompt) {
+  public GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt setPrompt(java.lang.String prompt) {
     this.prompt = prompt;
     return this;
   }
 
   @Override
-  public GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt set(String fieldName, Object value) {
-    return (GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt) super.set(fieldName, value);
+  public GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt set(String fieldName, Object value) {
+    return (GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt) super.set(fieldName, value);
   }
 
   @Override
-  public GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt clone() {
-    return (GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt) super.clone();
+  public GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt clone() {
+    return (GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt) super.clone();
   }
 
 }
diff --git a/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResult.java b/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResult.java
index b8c47538bbf..10d8c27885f 100644
--- a/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResult.java
+++ b/clients/google-api-services-retail/v2alpha/2.0.0/com/google/api/services/retail/v2alpha/model/GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResult.java
@@ -31,13 +31,19 @@
 public final class GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResult extends com.google.api.client.json.GenericJson {
 
   /**
-   * Conversational prompts to trigger agents like Shopping Agent. There may be multiple prompts for
-   * a single suggestion. This is an experimental feature for select customers. If you want to
-   * receive this prompt information, reach out to the Retail support team.
+   * Deprecated: Use CompleteQueryResponse.agent_prompts instead. Conversational prompts to trigger
+   * agents like Shopping Agent. There may be multiple prompts for a single suggestion. This is an
+   * experimental feature for select customers.
    * The value may be {@code null}.
    */
   @com.google.api.client.util.Key
-  private java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt> agentPrompts;
+  private java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt> agentPrompts;
+
+  static {
+    // hack to force ProGuard to consider GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt used, since otherwise it would be stripped out
+    // see https://github.com/google/google-api-java-client/issues/543
+    com.google.api.client.util.Data.nullOf(GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt.class);
+  }
 
   /**
    * Custom attributes for the suggestion term. * For `user-data`, the attributes are additional
@@ -75,22 +81,22 @@ public final class GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResult
   private java.lang.Integer totalProductCount;
 
   /**
-   * Conversational prompts to trigger agents like Shopping Agent. There may be multiple prompts for
-   * a single suggestion. This is an experimental feature for select customers. If you want to
-   * receive this prompt information, reach out to the Retail support team.
+   * Deprecated: Use CompleteQueryResponse.agent_prompts instead. Conversational prompts to trigger
+   * agents like Shopping Agent. There may be multiple prompts for a single suggestion. This is an
+   * experimental feature for select customers.
    * @return value or {@code null} for none
    */
-  public java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt> getAgentPrompts() {
+  public java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt> getAgentPrompts() {
     return agentPrompts;
   }
 
   /**
-   * Conversational prompts to trigger agents like Shopping Agent. There may be multiple prompts for
-   * a single suggestion. This is an experimental feature for select customers. If you want to
-   * receive this prompt information, reach out to the Retail support team.
+   * Deprecated: Use CompleteQueryResponse.agent_prompts instead. Conversational prompts to trigger
+   * agents like Shopping Agent. There may be multiple prompts for a single suggestion. This is an
+   * experimental feature for select customers.
    * @param agentPrompts agentPrompts or {@code null} for none
    */
-  public GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResult setAgentPrompts(java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResultAgentPrompt> agentPrompts) {
+  public GoogleCloudRetailV2alphaCompleteQueryResponseCompletionResult setAgentPrompts(java.util.List<GoogleCloudRetailV2alphaCompleteQueryResponseAgentPrompt> agentPrompts) {
     this.agentPrompts = agentPrompts;
     return this;
   }
diff --git a/clients/google-api-services-retail/v2alpha/2.0.0/pom.xml b/clients/google-api-services-retail/v2alpha/2.0.0/pom.xml
index a4c403ba830..29d94b1927d 100644
--- a/clients/google-api-services-retail/v2alpha/2.0.0/pom.xml
+++ b/clients/google-api-services-retail/v2alpha/2.0.0/pom.xml
@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-retail</artifactId>
-  <version>v2alpha-rev20260813-2.0.0</version>
-  <name>AI Commerce Search API v2alpha-rev20260813-2.0.0</name>
+  <version>v2alpha-rev20260826-2.0.0</version>
+  <name>AI Commerce Search API v2alpha-rev20260826-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>
diff --git a/clients/google-api-services-retail/v2alpha/README.md b/clients/google-api-services-retail/v2alpha/README.md
index 0cba77fcd33..4d8e96fed85 100644
--- a/clients/google-api-services-retail/v2alpha/README.md
+++ b/clients/google-api-services-retail/v2alpha/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-retail</artifactId>
-      <version>v2alpha-rev20260813-2.0.0</version>
+      <version>v2alpha-rev20260826-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-retail:v2alpha-rev20260813-2.0.0'
+  implementation 'com.google.apis:google-api-services-retail:v2alpha-rev20260826-2.0.0'
 }
 ```