diff --git a/generation_config.yaml b/generation_config.yaml
index 259d83d81a..7c3cd58508 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,4 +1,4 @@
-googleapis_commitish: 6406df78515540a6a7d64b3dba19190766467455
+googleapis_commitish: 7a5706618f42f482acf583febcc7b977b66c25b2
 # the libraries are ordered with respect to library name, which is
 # java-{library.library_name} or java-{library.api-shortname} when
 # library.library_name is not defined.
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/Chip.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/Chip.java
index 023a3239e4..3af6b846b9 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/Chip.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/Chip.java
@@ -245,7 +245,7 @@ public com.google.apps.card.v1.OnClickOrBuilder getOnClickOrBuilder() {
    * <code>bool enabled = 4 [deprecated = true];</code>
    *
    * @deprecated google.apps.card.v1.Chip.enabled is deprecated. See
-   *     google/apps/card/v1/card.proto;l=2425
+   *     google/apps/card/v1/card.proto;l=2445
    * @return The enabled.
    */
   @java.lang.Override
@@ -1310,7 +1310,7 @@ public com.google.apps.card.v1.OnClickOrBuilder getOnClickOrBuilder() {
      * <code>bool enabled = 4 [deprecated = true];</code>
      *
      * @deprecated google.apps.card.v1.Chip.enabled is deprecated. See
-     *     google/apps/card/v1/card.proto;l=2425
+     *     google/apps/card/v1/card.proto;l=2445
      * @return The enabled.
      */
     @java.lang.Override
@@ -1331,7 +1331,7 @@ public boolean getEnabled() {
      * <code>bool enabled = 4 [deprecated = true];</code>
      *
      * @deprecated google.apps.card.v1.Chip.enabled is deprecated. See
-     *     google/apps/card/v1/card.proto;l=2425
+     *     google/apps/card/v1/card.proto;l=2445
      * @param value The enabled to set.
      * @return This builder for chaining.
      */
@@ -1356,7 +1356,7 @@ public Builder setEnabled(boolean value) {
      * <code>bool enabled = 4 [deprecated = true];</code>
      *
      * @deprecated google.apps.card.v1.Chip.enabled is deprecated. See
-     *     google/apps/card/v1/card.proto;l=2425
+     *     google/apps/card/v1/card.proto;l=2445
      * @return This builder for chaining.
      */
     @java.lang.Deprecated
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/ChipOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/ChipOrBuilder.java
index f561464f25..5cbd76948b 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/ChipOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/ChipOrBuilder.java
@@ -144,7 +144,7 @@ public interface ChipOrBuilder
    * <code>bool enabled = 4 [deprecated = true];</code>
    *
    * @deprecated google.apps.card.v1.Chip.enabled is deprecated. See
-   *     google/apps/card/v1/card.proto;l=2425
+   *     google/apps/card/v1/card.proto;l=2445
    * @return The enabled.
    */
   @java.lang.Deprecated
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/SelectionInput.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/SelectionInput.java
index 64761baf43..0a988c386a 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/SelectionInput.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/apps/card/v1/SelectionInput.java
@@ -143,6 +143,26 @@ public enum SelectionType implements com.google.protobuf.ProtocolMessageEnum {
      *
      * <pre>
      * A dropdown menu. Users can select one item from the menu.
+     *
+     * For Google Chat apps, you can populate items using a dynamic data source
+     * and autosuggest items as users type in the menu. For example, users can
+     * start typing the name of a Google Chat space and the widget autosuggests
+     * the space. To dynamically populate items for a dropdown menu, use one of
+     * the following types of data sources:
+     *
+     * * Google Workspace data: Items are populated using data from Google
+     * Workspace, such as Google Workspace users or Google Chat spaces.
+     * * External data: Items are populated from an external data
+     * source outside of Google Workspace.
+     *
+     * For examples of how to implement dropdown menus for Chat apps, see
+     * [Add a dropdown
+     * menu](https://developers.google.com/workspace/chat/design-interactive-card-dialog#dropdown-menu)
+     * and [Dynamically populate drop-down
+     * menus](https://developers.google.com/workspace/chat/design-interactive-card-dialog#dynamic-dropdown-menu).
+     *
+     * [Google Workspace add-ons and Chat
+     * apps](https://developers.google.com/workspace/extend):
      * </pre>
      *
      * <code>DROPDOWN = 3;</code>
@@ -229,6 +249,26 @@ public enum SelectionType implements com.google.protobuf.ProtocolMessageEnum {
      *
      * <pre>
      * A dropdown menu. Users can select one item from the menu.
+     *
+     * For Google Chat apps, you can populate items using a dynamic data source
+     * and autosuggest items as users type in the menu. For example, users can
+     * start typing the name of a Google Chat space and the widget autosuggests
+     * the space. To dynamically populate items for a dropdown menu, use one of
+     * the following types of data sources:
+     *
+     * * Google Workspace data: Items are populated using data from Google
+     * Workspace, such as Google Workspace users or Google Chat spaces.
+     * * External data: Items are populated from an external data
+     * source outside of Google Workspace.
+     *
+     * For examples of how to implement dropdown menus for Chat apps, see
+     * [Add a dropdown
+     * menu](https://developers.google.com/workspace/chat/design-interactive-card-dialog#dropdown-menu)
+     * and [Dynamically populate drop-down
+     * menus](https://developers.google.com/workspace/chat/design-interactive-card-dialog#dynamic-dropdown-menu).
+     *
+     * [Google Workspace add-ons and Chat
+     * apps](https://developers.google.com/workspace/extend):
      * </pre>
      *
      * <code>DROPDOWN = 3;</code>
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/apps/card/v1/card.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/apps/card/v1/card.proto
index f70c68c291..c6f659256c 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/apps/card/v1/card.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/apps/card/v1/card.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -1197,6 +1197,26 @@ message SelectionInput {
     SWITCH = 2;
 
     // A dropdown menu. Users can select one item from the menu.
+    //
+    // For Google Chat apps, you can populate items using a dynamic data source
+    // and autosuggest items as users type in the menu. For example, users can
+    // start typing the name of a Google Chat space and the widget autosuggests
+    // the space. To dynamically populate items for a dropdown menu, use one of
+    // the following types of data sources:
+    //
+    //  * Google Workspace data: Items are populated using data from Google
+    //    Workspace, such as Google Workspace users or Google Chat spaces.
+    //  * External data: Items are populated from an external data
+    //    source outside of Google Workspace.
+    //
+    // For examples of how to implement dropdown menus for Chat apps, see
+    // [Add a dropdown
+    // menu](https://developers.google.com/workspace/chat/design-interactive-card-dialog#dropdown-menu)
+    // and [Dynamically populate drop-down
+    // menus](https://developers.google.com/workspace/chat/design-interactive-card-dialog#dynamic-dropdown-menu).
+    //
+    // [Google Workspace add-ons and Chat
+    // apps](https://developers.google.com/workspace/extend):
     DROPDOWN = 3;
 
     // A menu with a text box. Users can type and select one or more items.