diff --git a/handwritten/firestore/.jsdoc.js b/handwritten/firestore/.jsdoc.js
index e6352a87b4b..7ba807e2023 100644
--- a/handwritten/firestore/.jsdoc.js
+++ b/handwritten/firestore/.jsdoc.js
@@ -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.
@@ -40,7 +40,7 @@ module.exports = {
     includePattern: '\\.js$'
   },
   templates: {
-    copyright: 'Copyright 2025 Google LLC',
+    copyright: 'Copyright 2026 Google LLC',
     includeDate: false,
     sourceFiles: false,
     systemName: '@google-cloud/firestore',
diff --git a/handwritten/firestore/dev/protos/admin_v1.json b/handwritten/firestore/dev/protos/admin_v1.json
index e39436cd1b8..c49787a1994 100644
--- a/handwritten/firestore/dev/protos/admin_v1.json
+++ b/handwritten/firestore/dev/protos/admin_v1.json
@@ -251,6 +251,27 @@
                           "options": {
                             "(google.api.field_behavior)": "IMMUTABLE"
                           }
+                        },
+                        "realtimeUpdatesMode": {
+                          "type": "RealtimeUpdatesMode",
+                          "id": 31,
+                          "options": {
+                            "(google.api.field_behavior)": "IMMUTABLE"
+                          }
+                        },
+                        "firestoreDataAccessMode": {
+                          "type": "DataAccessMode",
+                          "id": 33,
+                          "options": {
+                            "(google.api.field_behavior)": "OPTIONAL"
+                          }
+                        },
+                        "mongodbCompatibleDataAccessMode": {
+                          "type": "DataAccessMode",
+                          "id": 34,
+                          "options": {
+                            "(google.api.field_behavior)": "OPTIONAL"
+                          }
                         }
                       },
                       "nested": {
@@ -394,9 +415,23 @@
                             "STANDARD": 1,
                             "ENTERPRISE": 2
                           }
+                        },
+                        "DataAccessMode": {
+                          "values": {
+                            "DATA_ACCESS_MODE_UNSPECIFIED": 0,
+                            "DATA_ACCESS_MODE_ENABLED": 1,
+                            "DATA_ACCESS_MODE_DISABLED": 2
+                          }
                         }
                       }
                     },
+                    "RealtimeUpdatesMode": {
+                      "values": {
+                        "REALTIME_UPDATES_MODE_UNSPECIFIED": 0,
+                        "REALTIME_UPDATES_MODE_ENABLED": 1,
+                        "REALTIME_UPDATES_MODE_DISABLED": 2
+                      }
+                    },
                     "Field": {
                       "options": {
                         "(google.api.resource).type": "firestore.googleapis.com/Field",
@@ -511,6 +546,13 @@
                           "options": {
                             "(google.api.field_behavior)": "OPTIONAL"
                           }
+                        },
+                        "unique": {
+                          "type": "bool",
+                          "id": 10,
+                          "options": {
+                            "(google.api.field_behavior)": "OPTIONAL"
+                          }
                         }
                       },
                       "nested": {
diff --git a/handwritten/firestore/dev/protos/firestore_admin_v1_proto_api.d.ts b/handwritten/firestore/dev/protos/firestore_admin_v1_proto_api.d.ts
index 0e5aeb9e870..b538a95d47b 100644
--- a/handwritten/firestore/dev/protos/firestore_admin_v1_proto_api.d.ts
+++ b/handwritten/firestore/dev/protos/firestore_admin_v1_proto_api.d.ts
@@ -244,6 +244,15 @@ export namespace google {
 
                     /** Database databaseEdition */
                     databaseEdition?: (google.firestore.admin.v1.Database.DatabaseEdition|null);
+
+                    /** Database realtimeUpdatesMode */
+                    realtimeUpdatesMode?: (google.firestore.admin.v1.RealtimeUpdatesMode|null);
+
+                    /** Database firestoreDataAccessMode */
+                    firestoreDataAccessMode?: (google.firestore.admin.v1.Database.DataAccessMode|null);
+
+                    /** Database mongodbCompatibleDataAccessMode */
+                    mongodbCompatibleDataAccessMode?: (google.firestore.admin.v1.Database.DataAccessMode|null);
                 }
 
                 /** Represents a Database. */
@@ -318,6 +327,15 @@ export namespace google {
                     /** Database databaseEdition. */
                     public databaseEdition: google.firestore.admin.v1.Database.DatabaseEdition;
 
+                    /** Database realtimeUpdatesMode. */
+                    public realtimeUpdatesMode: google.firestore.admin.v1.RealtimeUpdatesMode;
+
+                    /** Database firestoreDataAccessMode. */
+                    public firestoreDataAccessMode: google.firestore.admin.v1.Database.DataAccessMode;
+
+                    /** Database mongodbCompatibleDataAccessMode. */
+                    public mongodbCompatibleDataAccessMode: google.firestore.admin.v1.Database.DataAccessMode;
+
                     /**
                      * Creates a Database message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
@@ -732,8 +750,16 @@ export namespace google {
                     /** DatabaseEdition enum. */
                     type DatabaseEdition =
                         "DATABASE_EDITION_UNSPECIFIED"| "STANDARD"| "ENTERPRISE";
+
+                    /** DataAccessMode enum. */
+                    type DataAccessMode =
+                        "DATA_ACCESS_MODE_UNSPECIFIED"| "DATA_ACCESS_MODE_ENABLED"| "DATA_ACCESS_MODE_DISABLED";
                 }
 
+                /** RealtimeUpdatesMode enum. */
+                type RealtimeUpdatesMode =
+                    "REALTIME_UPDATES_MODE_UNSPECIFIED"| "REALTIME_UPDATES_MODE_ENABLED"| "REALTIME_UPDATES_MODE_DISABLED";
+
                 /** Properties of a Field. */
                 interface IField {
 
@@ -944,6 +970,9 @@ export namespace google {
 
                     /** Index shardCount */
                     shardCount?: (number|null);
+
+                    /** Index unique */
+                    unique?: (boolean|null);
                 }
 
                 /** Represents an Index. */
@@ -979,6 +1008,9 @@ export namespace google {
                     /** Index shardCount. */
                     public shardCount: number;
 
+                    /** Index unique. */
+                    public unique: boolean;
+
                     /**
                      * Creates an Index message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
diff --git a/handwritten/firestore/dev/protos/firestore_admin_v1_proto_api.js b/handwritten/firestore/dev/protos/firestore_admin_v1_proto_api.js
index 86ef4cf7fcc..966b5d35b52 100644
--- a/handwritten/firestore/dev/protos/firestore_admin_v1_proto_api.js
+++ b/handwritten/firestore/dev/protos/firestore_admin_v1_proto_api.js
@@ -496,6 +496,9 @@
                          * @property {boolean|null} [freeTier] Database freeTier
                          * @property {string|null} [etag] Database etag
                          * @property {google.firestore.admin.v1.Database.DatabaseEdition|null} [databaseEdition] Database databaseEdition
+                         * @property {google.firestore.admin.v1.RealtimeUpdatesMode|null} [realtimeUpdatesMode] Database realtimeUpdatesMode
+                         * @property {google.firestore.admin.v1.Database.DataAccessMode|null} [firestoreDataAccessMode] Database firestoreDataAccessMode
+                         * @property {google.firestore.admin.v1.Database.DataAccessMode|null} [mongodbCompatibleDataAccessMode] Database mongodbCompatibleDataAccessMode
                          */
     
                         /**
@@ -682,6 +685,30 @@
                          */
                         Database.prototype.databaseEdition = 0;
     
+                        /**
+                         * Database realtimeUpdatesMode.
+                         * @member {google.firestore.admin.v1.RealtimeUpdatesMode} realtimeUpdatesMode
+                         * @memberof google.firestore.admin.v1.Database
+                         * @instance
+                         */
+                        Database.prototype.realtimeUpdatesMode = 0;
+    
+                        /**
+                         * Database firestoreDataAccessMode.
+                         * @member {google.firestore.admin.v1.Database.DataAccessMode} firestoreDataAccessMode
+                         * @memberof google.firestore.admin.v1.Database
+                         * @instance
+                         */
+                        Database.prototype.firestoreDataAccessMode = 0;
+    
+                        /**
+                         * Database mongodbCompatibleDataAccessMode.
+                         * @member {google.firestore.admin.v1.Database.DataAccessMode} mongodbCompatibleDataAccessMode
+                         * @memberof google.firestore.admin.v1.Database
+                         * @instance
+                         */
+                        Database.prototype.mongodbCompatibleDataAccessMode = 0;
+    
                         // OneOf field names bound to virtual getters and setters
                         var $oneOfFields;
     
@@ -883,6 +910,66 @@
                                 message.databaseEdition = 2;
                                 break;
                             }
+                            switch (object.realtimeUpdatesMode) {
+                            default:
+                                if (typeof object.realtimeUpdatesMode === "number") {
+                                    message.realtimeUpdatesMode = object.realtimeUpdatesMode;
+                                    break;
+                                }
+                                break;
+                            case "REALTIME_UPDATES_MODE_UNSPECIFIED":
+                            case 0:
+                                message.realtimeUpdatesMode = 0;
+                                break;
+                            case "REALTIME_UPDATES_MODE_ENABLED":
+                            case 1:
+                                message.realtimeUpdatesMode = 1;
+                                break;
+                            case "REALTIME_UPDATES_MODE_DISABLED":
+                            case 2:
+                                message.realtimeUpdatesMode = 2;
+                                break;
+                            }
+                            switch (object.firestoreDataAccessMode) {
+                            default:
+                                if (typeof object.firestoreDataAccessMode === "number") {
+                                    message.firestoreDataAccessMode = object.firestoreDataAccessMode;
+                                    break;
+                                }
+                                break;
+                            case "DATA_ACCESS_MODE_UNSPECIFIED":
+                            case 0:
+                                message.firestoreDataAccessMode = 0;
+                                break;
+                            case "DATA_ACCESS_MODE_ENABLED":
+                            case 1:
+                                message.firestoreDataAccessMode = 1;
+                                break;
+                            case "DATA_ACCESS_MODE_DISABLED":
+                            case 2:
+                                message.firestoreDataAccessMode = 2;
+                                break;
+                            }
+                            switch (object.mongodbCompatibleDataAccessMode) {
+                            default:
+                                if (typeof object.mongodbCompatibleDataAccessMode === "number") {
+                                    message.mongodbCompatibleDataAccessMode = object.mongodbCompatibleDataAccessMode;
+                                    break;
+                                }
+                                break;
+                            case "DATA_ACCESS_MODE_UNSPECIFIED":
+                            case 0:
+                                message.mongodbCompatibleDataAccessMode = 0;
+                                break;
+                            case "DATA_ACCESS_MODE_ENABLED":
+                            case 1:
+                                message.mongodbCompatibleDataAccessMode = 1;
+                                break;
+                            case "DATA_ACCESS_MODE_DISABLED":
+                            case 2:
+                                message.mongodbCompatibleDataAccessMode = 2;
+                                break;
+                            }
                             return message;
                         };
     
@@ -920,6 +1007,9 @@
                                 object.previousId = "";
                                 object.sourceInfo = null;
                                 object.databaseEdition = options.enums === String ? "DATABASE_EDITION_UNSPECIFIED" : 0;
+                                object.realtimeUpdatesMode = options.enums === String ? "REALTIME_UPDATES_MODE_UNSPECIFIED" : 0;
+                                object.firestoreDataAccessMode = options.enums === String ? "DATA_ACCESS_MODE_UNSPECIFIED" : 0;
+                                object.mongodbCompatibleDataAccessMode = options.enums === String ? "DATA_ACCESS_MODE_UNSPECIFIED" : 0;
                                 object.etag = "";
                             }
                             if (message.name != null && message.hasOwnProperty("name"))
@@ -969,6 +1059,12 @@
                                 if (options.oneofs)
                                     object._freeTier = "freeTier";
                             }
+                            if (message.realtimeUpdatesMode != null && message.hasOwnProperty("realtimeUpdatesMode"))
+                                object.realtimeUpdatesMode = options.enums === String ? $root.google.firestore.admin.v1.RealtimeUpdatesMode[message.realtimeUpdatesMode] === undefined ? message.realtimeUpdatesMode : $root.google.firestore.admin.v1.RealtimeUpdatesMode[message.realtimeUpdatesMode] : message.realtimeUpdatesMode;
+                            if (message.firestoreDataAccessMode != null && message.hasOwnProperty("firestoreDataAccessMode"))
+                                object.firestoreDataAccessMode = options.enums === String ? $root.google.firestore.admin.v1.Database.DataAccessMode[message.firestoreDataAccessMode] === undefined ? message.firestoreDataAccessMode : $root.google.firestore.admin.v1.Database.DataAccessMode[message.firestoreDataAccessMode] : message.firestoreDataAccessMode;
+                            if (message.mongodbCompatibleDataAccessMode != null && message.hasOwnProperty("mongodbCompatibleDataAccessMode"))
+                                object.mongodbCompatibleDataAccessMode = options.enums === String ? $root.google.firestore.admin.v1.Database.DataAccessMode[message.mongodbCompatibleDataAccessMode] === undefined ? message.mongodbCompatibleDataAccessMode : $root.google.firestore.admin.v1.Database.DataAccessMode[message.mongodbCompatibleDataAccessMode] : message.mongodbCompatibleDataAccessMode;
                             if (message.etag != null && message.hasOwnProperty("etag"))
                                 object.etag = message.etag;
                             return object;
@@ -1859,9 +1955,41 @@
                             return values;
                         })();
     
+                        /**
+                         * DataAccessMode enum.
+                         * @name google.firestore.admin.v1.Database.DataAccessMode
+                         * @enum {string}
+                         * @property {string} DATA_ACCESS_MODE_UNSPECIFIED=DATA_ACCESS_MODE_UNSPECIFIED DATA_ACCESS_MODE_UNSPECIFIED value
+                         * @property {string} DATA_ACCESS_MODE_ENABLED=DATA_ACCESS_MODE_ENABLED DATA_ACCESS_MODE_ENABLED value
+                         * @property {string} DATA_ACCESS_MODE_DISABLED=DATA_ACCESS_MODE_DISABLED DATA_ACCESS_MODE_DISABLED value
+                         */
+                        Database.DataAccessMode = (function() {
+                            var valuesById = {}, values = Object.create(valuesById);
+                            values[valuesById[0] = "DATA_ACCESS_MODE_UNSPECIFIED"] = "DATA_ACCESS_MODE_UNSPECIFIED";
+                            values[valuesById[1] = "DATA_ACCESS_MODE_ENABLED"] = "DATA_ACCESS_MODE_ENABLED";
+                            values[valuesById[2] = "DATA_ACCESS_MODE_DISABLED"] = "DATA_ACCESS_MODE_DISABLED";
+                            return values;
+                        })();
+    
                         return Database;
                     })();
     
+                    /**
+                     * RealtimeUpdatesMode enum.
+                     * @name google.firestore.admin.v1.RealtimeUpdatesMode
+                     * @enum {string}
+                     * @property {string} REALTIME_UPDATES_MODE_UNSPECIFIED=REALTIME_UPDATES_MODE_UNSPECIFIED REALTIME_UPDATES_MODE_UNSPECIFIED value
+                     * @property {string} REALTIME_UPDATES_MODE_ENABLED=REALTIME_UPDATES_MODE_ENABLED REALTIME_UPDATES_MODE_ENABLED value
+                     * @property {string} REALTIME_UPDATES_MODE_DISABLED=REALTIME_UPDATES_MODE_DISABLED REALTIME_UPDATES_MODE_DISABLED value
+                     */
+                    v1.RealtimeUpdatesMode = (function() {
+                        var valuesById = {}, values = Object.create(valuesById);
+                        values[valuesById[0] = "REALTIME_UPDATES_MODE_UNSPECIFIED"] = "REALTIME_UPDATES_MODE_UNSPECIFIED";
+                        values[valuesById[1] = "REALTIME_UPDATES_MODE_ENABLED"] = "REALTIME_UPDATES_MODE_ENABLED";
+                        values[valuesById[2] = "REALTIME_UPDATES_MODE_DISABLED"] = "REALTIME_UPDATES_MODE_DISABLED";
+                        return values;
+                    })();
+    
                     v1.Field = (function() {
     
                         /**
@@ -2301,6 +2429,7 @@
                          * @property {google.firestore.admin.v1.Index.Density|null} [density] Index density
                          * @property {boolean|null} [multikey] Index multikey
                          * @property {number|null} [shardCount] Index shardCount
+                         * @property {boolean|null} [unique] Index unique
                          */
     
                         /**
@@ -2383,6 +2512,14 @@
                          */
                         Index.prototype.shardCount = 0;
     
+                        /**
+                         * Index unique.
+                         * @member {boolean} unique
+                         * @memberof google.firestore.admin.v1.Index
+                         * @instance
+                         */
+                        Index.prototype.unique = false;
+    
                         /**
                          * Creates an Index message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
@@ -2503,6 +2640,8 @@
                                 message.multikey = Boolean(object.multikey);
                             if (object.shardCount != null)
                                 message.shardCount = object.shardCount | 0;
+                            if (object.unique != null)
+                                message.unique = Boolean(object.unique);
                             return message;
                         };
     
@@ -2529,6 +2668,7 @@
                                 object.density = options.enums === String ? "DENSITY_UNSPECIFIED" : 0;
                                 object.multikey = false;
                                 object.shardCount = 0;
+                                object.unique = false;
                             }
                             if (message.name != null && message.hasOwnProperty("name"))
                                 object.name = message.name;
@@ -2549,6 +2689,8 @@
                                 object.multikey = message.multikey;
                             if (message.shardCount != null && message.hasOwnProperty("shardCount"))
                                 object.shardCount = message.shardCount;
+                            if (message.unique != null && message.hasOwnProperty("unique"))
+                                object.unique = message.unique;
                             return object;
                         };
     
diff --git a/handwritten/firestore/dev/protos/firestore_v1_proto_api.d.ts b/handwritten/firestore/dev/protos/firestore_v1_proto_api.d.ts
index 333cb9f564c..f0353f5d340 100644
--- a/handwritten/firestore/dev/protos/firestore_v1_proto_api.d.ts
+++ b/handwritten/firestore/dev/protos/firestore_v1_proto_api.d.ts
@@ -519,6 +519,9 @@ export namespace google {
                 /** Value fieldReferenceValue */
                 fieldReferenceValue?: (string|null);
 
+                /** Value variableReferenceValue */
+                variableReferenceValue?: (string|null);
+
                 /** Value functionValue */
                 functionValue?: (google.firestore.v1.IFunction|null);
 
@@ -571,6 +574,9 @@ export namespace google {
                 /** Value fieldReferenceValue. */
                 public fieldReferenceValue?: (string|null);
 
+                /** Value variableReferenceValue. */
+                public variableReferenceValue?: (string|null);
+
                 /** Value functionValue. */
                 public functionValue?: (google.firestore.v1.IFunction|null);
 
@@ -578,7 +584,7 @@ export namespace google {
                 public pipelineValue?: (google.firestore.v1.IPipeline|null);
 
                 /** Value valueType. */
-                public valueType?: ("nullValue"|"booleanValue"|"integerValue"|"doubleValue"|"timestampValue"|"stringValue"|"bytesValue"|"referenceValue"|"geoPointValue"|"arrayValue"|"mapValue"|"fieldReferenceValue"|"functionValue"|"pipelineValue");
+                public valueType?: ("nullValue"|"booleanValue"|"integerValue"|"doubleValue"|"timestampValue"|"stringValue"|"bytesValue"|"referenceValue"|"geoPointValue"|"arrayValue"|"mapValue"|"fieldReferenceValue"|"variableReferenceValue"|"functionValue"|"pipelineValue");
 
                 /**
                  * Creates a Value message from a plain object. Also converts values to their respective internal types.
diff --git a/handwritten/firestore/dev/protos/firestore_v1_proto_api.js b/handwritten/firestore/dev/protos/firestore_v1_proto_api.js
index b53bbf22768..5f1dbccaf59 100644
--- a/handwritten/firestore/dev/protos/firestore_v1_proto_api.js
+++ b/handwritten/firestore/dev/protos/firestore_v1_proto_api.js
@@ -1167,6 +1167,7 @@
                      * @property {google.firestore.v1.IArrayValue|null} [arrayValue] Value arrayValue
                      * @property {google.firestore.v1.IMapValue|null} [mapValue] Value mapValue
                      * @property {string|null} [fieldReferenceValue] Value fieldReferenceValue
+                     * @property {string|null} [variableReferenceValue] Value variableReferenceValue
                      * @property {google.firestore.v1.IFunction|null} [functionValue] Value functionValue
                      * @property {google.firestore.v1.IPipeline|null} [pipelineValue] Value pipelineValue
                      */
@@ -1282,6 +1283,14 @@
                      */
                     Value.prototype.fieldReferenceValue = null;
     
+                    /**
+                     * Value variableReferenceValue.
+                     * @member {string|null|undefined} variableReferenceValue
+                     * @memberof google.firestore.v1.Value
+                     * @instance
+                     */
+                    Value.prototype.variableReferenceValue = null;
+    
                     /**
                      * Value functionValue.
                      * @member {google.firestore.v1.IFunction|null|undefined} functionValue
@@ -1303,12 +1312,12 @@
     
                     /**
                      * Value valueType.
-                     * @member {"nullValue"|"booleanValue"|"integerValue"|"doubleValue"|"timestampValue"|"stringValue"|"bytesValue"|"referenceValue"|"geoPointValue"|"arrayValue"|"mapValue"|"fieldReferenceValue"|"functionValue"|"pipelineValue"|undefined} valueType
+                     * @member {"nullValue"|"booleanValue"|"integerValue"|"doubleValue"|"timestampValue"|"stringValue"|"bytesValue"|"referenceValue"|"geoPointValue"|"arrayValue"|"mapValue"|"fieldReferenceValue"|"variableReferenceValue"|"functionValue"|"pipelineValue"|undefined} valueType
                      * @memberof google.firestore.v1.Value
                      * @instance
                      */
                     Object.defineProperty(Value.prototype, "valueType", {
-                        get: $util.oneOfGetter($oneOfFields = ["nullValue", "booleanValue", "integerValue", "doubleValue", "timestampValue", "stringValue", "bytesValue", "referenceValue", "geoPointValue", "arrayValue", "mapValue", "fieldReferenceValue", "functionValue", "pipelineValue"]),
+                        get: $util.oneOfGetter($oneOfFields = ["nullValue", "booleanValue", "integerValue", "doubleValue", "timestampValue", "stringValue", "bytesValue", "referenceValue", "geoPointValue", "arrayValue", "mapValue", "fieldReferenceValue", "variableReferenceValue", "functionValue", "pipelineValue"]),
                         set: $util.oneOfSetter($oneOfFields)
                     });
     
@@ -1380,6 +1389,8 @@
                         }
                         if (object.fieldReferenceValue != null)
                             message.fieldReferenceValue = String(object.fieldReferenceValue);
+                        if (object.variableReferenceValue != null)
+                            message.variableReferenceValue = String(object.variableReferenceValue);
                         if (object.functionValue != null) {
                             if (typeof object.functionValue !== "object")
                                 throw TypeError(".google.firestore.v1.Value.functionValue: object expected");
@@ -1479,6 +1490,11 @@
                             if (options.oneofs)
                                 object.valueType = "pipelineValue";
                         }
+                        if (message.variableReferenceValue != null && message.hasOwnProperty("variableReferenceValue")) {
+                            object.variableReferenceValue = message.variableReferenceValue;
+                            if (options.oneofs)
+                                object.valueType = "variableReferenceValue";
+                        }
                         return object;
                     };
     
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/backup.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/backup.proto
index bed41ff6680..613eb1184b6 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/backup.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/backup.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/database.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/database.proto
index 3537e4a3b64..39f69e7e907 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/database.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/database.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.
@@ -18,6 +18,7 @@ package google.firestore.admin.v1;
 
 import "google/api/field_behavior.proto";
 import "google/api/resource.proto";
+import "google/firestore/admin/v1/realtime_updates.proto";
 import "google/protobuf/duration.proto";
 import "google/protobuf/timestamp.proto";
 
@@ -65,20 +66,25 @@ message Database {
 
     // Use optimistic concurrency control by default. This mode is available
     // for Cloud Firestore databases.
+    //
+    // This is the default setting for Cloud Firestore Enterprise Edition
+    // databases.
     OPTIMISTIC = 1;
 
     // Use pessimistic concurrency control by default. This mode is available
     // for Cloud Firestore databases.
     //
-    // This is the default setting for Cloud Firestore.
+    // This is the default setting for Cloud Firestore Standard Edition
+    // databases.
     PESSIMISTIC = 2;
 
     // Use optimistic concurrency control with entity groups by default.
     //
-    // This is the only available mode for Cloud Datastore.
+    // This mode is enabled for some databases that were automatically upgraded
+    // from Cloud Datastore to Cloud Firestore with Datastore Mode.
     //
-    // This mode is also available for Cloud Firestore with Datastore Mode but
-    // is not recommended.
+    // It is not recommended for any new databases, and not supported for
+    // Firestore Native databases.
     OPTIMISTIC_WITH_ENTITY_GROUPS = 3;
   }
 
@@ -189,7 +195,8 @@ message Database {
   // Encryption configuration for a new database being created from another
   // source.
   //
-  // The source could be a [Backup][google.firestore.admin.v1.Backup] .
+  // The source could be a [Backup][google.firestore.admin.v1.Backup] or a
+  // [PitrSnapshot][google.firestore.admin.v1.PitrSnapshot].
   message EncryptionConfig {
     // The configuration options for using Google default encryption.
     message GoogleDefaultEncryptionOptions {}
@@ -241,6 +248,18 @@ message Database {
     ENTERPRISE = 2;
   }
 
+  // The data access mode.
+  enum DataAccessMode {
+    // Not Used.
+    DATA_ACCESS_MODE_UNSPECIFIED = 0;
+
+    // Accessing the database through the API is allowed.
+    DATA_ACCESS_MODE_ENABLED = 1;
+
+    // Accessing the database through the API is disallowed.
+    DATA_ACCESS_MODE_DISABLED = 2;
+  }
+
   // The resource name of the Database.
   // Format: `projects/{project}/databases/{database}`
   string name = 1;
@@ -274,6 +293,10 @@ message Database {
   DatabaseType type = 10;
 
   // The concurrency control mode to use for this database.
+  //
+  // If unspecified in a CreateDatabase request, this will default based on the
+  // database edition: Optimistic for Enterprise and Pessimistic for all other
+  // databases.
   ConcurrencyMode concurrency_mode = 15;
 
   // Output only. The period during which past versions of data are retained in
@@ -359,4 +382,22 @@ message Database {
   // Immutable. The edition of the database.
   DatabaseEdition database_edition = 28
       [(google.api.field_behavior) = IMMUTABLE];
+
+  // Immutable. The default Realtime Updates mode to use for this database.
+  RealtimeUpdatesMode realtime_updates_mode = 31
+      [(google.api.field_behavior) = IMMUTABLE];
+
+  // Optional. The Firestore API data access mode to use for this database. If
+  // not set on write:
+  // - the default value is DATA_ACCESS_MODE_DISABLED for Enterprise Edition.
+  // - the default value is DATA_ACCESS_MODE_ENABLED for Standard Edition.
+  DataAccessMode firestore_data_access_mode = 33
+      [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. The MongoDB compatible API data access mode to use for this
+  // database. If not set on write, the default value is
+  // DATA_ACCESS_MODE_ENABLED for Enterprise Edition. The value is always
+  // DATA_ACCESS_MODE_DISABLED for Standard Edition.
+  DataAccessMode mongodb_compatible_data_access_mode = 34
+      [(google.api.field_behavior) = OPTIONAL];
 }
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/field.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/field.proto
index d899bdb5c03..cdd1c859ef2 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/field.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/field.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.
@@ -67,10 +67,13 @@ message Field {
   // set.
   //
   // Storing a timestamp value into a TTL-enabled field will be treated as
-  // the document's absolute expiration time. Timestamp values in the past
-  // indicate that the document is eligible for immediate expiration. Using any
-  // other data type or leaving the field absent will disable expiration for the
-  // individual document.
+  // the document's absolute expiration time. For Enterprise edition databases,
+  // the timestamp value may also be stored in an array value in the
+  // TTL-enabled field.
+  //
+  // Timestamp values in the past indicate that the document is eligible for
+  // immediate expiration. Using any other data type or leaving the field absent
+  // will disable expiration for the individual document.
   message TtlConfig {
     // The state of applying the TTL configuration to all documents.
     enum State {
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/firestore_admin.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/firestore_admin.proto
index 1d4efbdde1b..1dbf0cec1e0 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/firestore_admin.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/firestore_admin.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.
@@ -538,7 +538,7 @@ message CreateDatabaseRequest {
   // with first character a letter and the last a letter or a number. Must not
   // be UUID-like /[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}/.
   //
-  // "(default)" database ID is also valid.
+  // "(default)" database ID is also valid if the database is Standard edition.
   string database_id = 3 [(google.api.field_behavior) = REQUIRED];
 }
 
@@ -943,8 +943,8 @@ message ExportDocumentsRequest {
     }
   ];
 
-  // Which collection IDs to export. Unspecified means all collections. Each
-  // collection ID in this list must be unique.
+  // IDs of the collection groups to export. Unspecified means all
+  // collection groups. Each collection group in this list must be unique.
   repeated string collection_ids = 2;
 
   // The output URI. Currently only supports Google Cloud Storage URIs of the
@@ -987,8 +987,9 @@ message ImportDocumentsRequest {
     }
   ];
 
-  // Which collection IDs to import. Unspecified means all collections included
-  // in the import. Each collection ID in this list must be unique.
+  // IDs of the collection groups to import. Unspecified means all collection
+  // groups that were included in the export. Each collection group in this list
+  // must be unique.
   repeated string collection_ids = 2;
 
   // Location of the exported files.
@@ -1144,7 +1145,7 @@ message RestoreDatabaseRequest {
   // with first character a letter and the last a letter or a number. Must not
   // be UUID-like /[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}/.
   //
-  // "(default)" database ID is also valid.
+  // "(default)" database ID is also valid if the database is Standard edition.
   string database_id = 2 [(google.api.field_behavior) = REQUIRED];
 
   // Required. Backup to restore from. Must be from the same project as the
@@ -1199,7 +1200,7 @@ message CloneDatabaseRequest {
   // with first character a letter and the last a letter or a number. Must not
   // be UUID-like /[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}/.
   //
-  // "(default)" database ID is also valid.
+  // "(default)" database ID is also valid if the database is Standard edition.
   string database_id = 2 [(google.api.field_behavior) = REQUIRED];
 
   // Required. Specification of the PITR data to clone from. The source database
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/index.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/index.proto
index 5dd4dc9fb97..d98753ce497 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/index.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/index.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.
@@ -171,23 +171,65 @@ message Index {
     // only.
     DENSITY_UNSPECIFIED = 0;
 
-    // In order for an index entry to be added, the document must
-    // contain all fields specified in the index.
+    // An index entry will only exist if ALL fields are present in the document.
     //
-    // This is the only allowed value for indexes having ApiScope `ANY_API` and
-    // `DATASTORE_MODE_API`.
+    // This is both the default and only allowed value for Standard Edition
+    // databases (for both Cloud Firestore `ANY_API` and Cloud Datastore
+    // `DATASTORE_MODE_API`).
+    //
+    // Take for example the following document:
+    //
+    // ```
+    // {
+    //   "__name__": "...",
+    //   "a": 1,
+    //   "b": 2,
+    //   "c": 3
+    // }
+    // ```
+    //
+    // an index on `(a ASC, b ASC, c ASC, __name__ ASC)` will generate an index
+    // entry for this document since `a`, 'b', `c`, and `__name__` are all
+    // present but an index of `(a ASC, d ASC, __name__ ASC)` will not generate
+    // an index entry for this document since `d` is missing.
+    //
+    // This means that such indexes can only be used to serve a query when the
+    // query has either implicit or explicit requirements that all fields from
+    // the index are present.
     SPARSE_ALL = 1;
 
-    // In order for an index entry to be added, the document must
-    // contain at least one of the fields specified in the index.
-    // Non-existent fields are treated as having a NULL value when generating
-    // index entries.
+    // An index entry will exist if ANY field are present in the document.
+    //
+    // This is used as the definition of a sparse index for Enterprise Edition
+    // databases.
+    //
+    // Take for example the following document:
+    //
+    // ```
+    // {
+    //   "__name__": "...",
+    //   "a": 1,
+    //   "b": 2,
+    //   "c": 3
+    // }
+    // ```
+    //
+    // an index on `(a ASC, d ASC)` will generate an index entry for this
+    // document since `a` is present, and will fill in an `unset` value for `d`.
+    // An index on `(d ASC, e ASC)` will not generate any index entry as neither
+    // `d` nor `e` are present.
+    //
+    // An index that contains `__name__` will generate an index entry for all
+    // documents since Firestore guarantees that all documents have a `__name__`
+    // field.
     SPARSE_ANY = 2;
 
-    // An index entry will be added regardless of whether the
-    // document contains any of the fields specified in the index.
-    // Non-existent fields are treated as having a NULL value when generating
-    // index entries.
+    // An index entry will exist regardless of if the fields are present or not.
+    //
+    // This is the default density for an Enterprise Edition database.
+    //
+    // The index will store `unset` values for fields that are not present in
+    // the document.
     DENSE = 3;
   }
 
@@ -240,4 +282,8 @@ message Index {
 
   // Optional. The number of shards for the index.
   int32 shard_count = 8 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. Whether it is an unique index. Unique index ensures all values
+  // for the indexed field(s) are unique across documents.
+  bool unique = 10 [(google.api.field_behavior) = OPTIONAL];
 }
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/location.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/location.proto
index 1eaa5df3314..702138b1518 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/location.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/location.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/operation.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/operation.proto
index 6fa21489f77..eefc3e3384e 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/operation.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/operation.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/realtime_updates.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/realtime_updates.proto
new file mode 100644
index 00000000000..e06a63792ef
--- /dev/null
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/realtime_updates.proto
@@ -0,0 +1,40 @@
+// 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.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.firestore.admin.v1;
+
+option csharp_namespace = "Google.Cloud.Firestore.Admin.V1";
+option go_package = "cloud.google.com/go/firestore/apiv1/admin/adminpb;adminpb";
+option java_multiple_files = true;
+option java_outer_classname = "RealtimeUpdatesProto";
+option java_package = "com.google.firestore.admin.v1";
+option objc_class_prefix = "GCFS";
+option php_namespace = "Google\\Cloud\\Firestore\\Admin\\V1";
+option ruby_package = "Google::Cloud::Firestore::Admin::V1";
+
+// The Realtime Updates mode.
+enum RealtimeUpdatesMode {
+  // The Realtime Updates feature is not specified.
+  REALTIME_UPDATES_MODE_UNSPECIFIED = 0;
+
+  // The Realtime Updates feature is enabled by default.
+  //
+  // This could potentially degrade write performance for the database.
+  REALTIME_UPDATES_MODE_ENABLED = 1;
+
+  // The Realtime Updates feature is disabled by default.
+  REALTIME_UPDATES_MODE_DISABLED = 2;
+}
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/schedule.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/schedule.proto
index 0f1798247e4..c6f3b3d3825 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/schedule.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/schedule.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/snapshot.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/snapshot.proto
index 895bed4dab6..07a5e0bc1e9 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/snapshot.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/snapshot.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/admin/v1/user_creds.proto b/handwritten/firestore/dev/protos/google/firestore/admin/v1/user_creds.proto
index ae4db3e4615..e949a085aa6 100644
--- a/handwritten/firestore/dev/protos/google/firestore/admin/v1/user_creds.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/admin/v1/user_creds.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/aggregation_result.proto b/handwritten/firestore/dev/protos/google/firestore/v1/aggregation_result.proto
index 26c42b9be3e..4eee2ddc8aa 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/aggregation_result.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/aggregation_result.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/bloom_filter.proto b/handwritten/firestore/dev/protos/google/firestore/v1/bloom_filter.proto
index e697ede6f78..f9bbdbf08d5 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/bloom_filter.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/bloom_filter.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/common.proto b/handwritten/firestore/dev/protos/google/firestore/v1/common.proto
index 150e06e8b2d..799fd011c26 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/common.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/common.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/document.proto b/handwritten/firestore/dev/protos/google/firestore/v1/document.proto
index 1eec17bf5d5..a77dbd99718 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/document.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/document.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.
@@ -142,6 +142,13 @@ message Value {
     // * Not allowed to be used when writing documents.
     string field_reference_value = 19;
 
+    // Pointer to a variable defined elsewhere in a pipeline.
+    //
+    // Unlike `field_reference_value` which references a field within a
+    // document, this refers to a variable, defined in a separate namespace than
+    // the fields of a document.
+    string variable_reference_value = 22;
+
     // A value that represents an unevaluated expression.
     //
     // **Requires:**
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/explain_stats.proto b/handwritten/firestore/dev/protos/google/firestore/v1/explain_stats.proto
index 3ec7dbf71e8..a05d530133b 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/explain_stats.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/explain_stats.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/firestore.proto b/handwritten/firestore/dev/protos/google/firestore/v1/firestore.proto
index 245d39d70dc..f65646a4afd 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/firestore.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/firestore.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/pipeline.proto b/handwritten/firestore/dev/protos/google/firestore/v1/pipeline.proto
index 484b12d00bd..509ecd2730e 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/pipeline.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/pipeline.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/query.proto b/handwritten/firestore/dev/protos/google/firestore/v1/query.proto
index 492f67af7e5..0144ffe5cd9 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/query.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/query.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/query_profile.proto b/handwritten/firestore/dev/protos/google/firestore/v1/query_profile.proto
index 73f8cb1bacd..a5f9e95c51f 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/query_profile.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/query_profile.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.
diff --git a/handwritten/firestore/dev/protos/google/firestore/v1/write.proto b/handwritten/firestore/dev/protos/google/firestore/v1/write.proto
index fa25cc2a505..49f9a4870f9 100644
--- a/handwritten/firestore/dev/protos/google/firestore/v1/write.proto
+++ b/handwritten/firestore/dev/protos/google/firestore/v1/write.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.
diff --git a/handwritten/firestore/dev/protos/v1.json b/handwritten/firestore/dev/protos/v1.json
index 465e1689ff3..95450ca0f41 100644
--- a/handwritten/firestore/dev/protos/v1.json
+++ b/handwritten/firestore/dev/protos/v1.json
@@ -62,6 +62,7 @@
                         "arrayValue",
                         "mapValue",
                         "fieldReferenceValue",
+                        "variableReferenceValue",
                         "functionValue",
                         "pipelineValue"
                       ]
@@ -116,6 +117,10 @@
                       "type": "string",
                       "id": 19
                     },
+                    "variableReferenceValue": {
+                      "type": "string",
+                      "id": 22
+                    },
                     "functionValue": {
                       "type": "Function",
                       "id": 20
diff --git a/handwritten/firestore/dev/src/v1/firestore_admin_client.ts b/handwritten/firestore/dev/src/v1/firestore_admin_client.ts
index 50570635fa6..6f270b170a8 100644
--- a/handwritten/firestore/dev/src/v1/firestore_admin_client.ts
+++ b/handwritten/firestore/dev/src/v1/firestore_admin_client.ts
@@ -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.
@@ -3705,8 +3705,8 @@ export class FirestoreAdminClient {
    *   Required. Database to export. Should be of the form:
    *   `projects/{project_id}/databases/{database_id}`.
    * @param {string[]} request.collectionIds
-   *   Which collection IDs to export. Unspecified means all collections. Each
-   *   collection ID in this list must be unique.
+   *   IDs of the collection groups to export. Unspecified means all
+   *   collection groups. Each collection group in this list must be unique.
    * @param {string} request.outputUriPrefix
    *   The output URI. Currently only supports Google Cloud Storage URIs of the
    *   form: `gs://BUCKET_NAME[/NAMESPACE_PATH]`, where `BUCKET_NAME` is the name
@@ -3906,8 +3906,9 @@ export class FirestoreAdminClient {
    *   Required. Database to import into. Should be of the form:
    *   `projects/{project_id}/databases/{database_id}`.
    * @param {string[]} request.collectionIds
-   *   Which collection IDs to import. Unspecified means all collections included
-   *   in the import. Each collection ID in this list must be unique.
+   *   IDs of the collection groups to import. Unspecified means all collection
+   *   groups that were included in the export. Each collection group in this list
+   *   must be unique.
    * @param {string} request.inputUriPrefix
    *   Location of the exported files.
    *   This must match the output_uri_prefix of an ExportDocumentsResponse from
@@ -4294,7 +4295,7 @@ export class FirestoreAdminClient {
    *   with first character a letter and the last a letter or a number. Must not
    *   be UUID-like /[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}/.
    *
-   *   "(default)" database ID is also valid.
+   *   "(default)" database ID is also valid if the database is Standard edition.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Promise} - The promise which resolves to an array.
@@ -4835,7 +4836,7 @@ export class FirestoreAdminClient {
    *   with first character a letter and the last a letter or a number. Must not
    *   be UUID-like /[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}/.
    *
-   *   "(default)" database ID is also valid.
+   *   "(default)" database ID is also valid if the database is Standard edition.
    * @param {string} request.backup
    *   Required. Backup to restore from. Must be from the same project as the
    *   parent.
@@ -5050,7 +5051,7 @@ export class FirestoreAdminClient {
    *   with first character a letter and the last a letter or a number. Must not
    *   be UUID-like /[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}/.
    *
-   *   "(default)" database ID is also valid.
+   *   "(default)" database ID is also valid if the database is Standard edition.
    * @param {google.firestore.admin.v1.PitrSnapshot} request.pitrSnapshot
    *   Required. Specification of the PITR data to clone from. The source database
    *   must exist.
diff --git a/handwritten/firestore/dev/src/v1/firestore_admin_proto_list.json b/handwritten/firestore/dev/src/v1/firestore_admin_proto_list.json
index 72095b1e714..8b50432407c 100644
--- a/handwritten/firestore/dev/src/v1/firestore_admin_proto_list.json
+++ b/handwritten/firestore/dev/src/v1/firestore_admin_proto_list.json
@@ -6,6 +6,7 @@
   "../../protos/google/firestore/admin/v1/index.proto",
   "../../protos/google/firestore/admin/v1/location.proto",
   "../../protos/google/firestore/admin/v1/operation.proto",
+  "../../protos/google/firestore/admin/v1/realtime_updates.proto",
   "../../protos/google/firestore/admin/v1/schedule.proto",
   "../../protos/google/firestore/admin/v1/snapshot.proto",
   "../../protos/google/firestore/admin/v1/user_creds.proto"
diff --git a/handwritten/firestore/dev/src/v1/firestore_client.ts b/handwritten/firestore/dev/src/v1/firestore_client.ts
index 9429a2d62f5..cc21ec244bf 100644
--- a/handwritten/firestore/dev/src/v1/firestore_client.ts
+++ b/handwritten/firestore/dev/src/v1/firestore_client.ts
@@ -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.
diff --git a/handwritten/firestore/dev/src/v1/firestore_client_config.json b/handwritten/firestore/dev/src/v1/firestore_client_config.json
index 47cbabb9091..d820a4667ed 100644
--- a/handwritten/firestore/dev/src/v1/firestore_client_config.json
+++ b/handwritten/firestore/dev/src/v1/firestore_client_config.json
@@ -17,6 +17,11 @@
           "RESOURCE_EXHAUSTED",
           "UNAVAILABLE"
         ],
+        "deadline_exceeded_internal_unavailable": [
+          "DEADLINE_EXCEEDED",
+          "INTERNAL",
+          "UNAVAILABLE"
+        ],
         "resource_exhausted_aborted_unavailable": [
           "RESOURCE_EXHAUSTED",
           "ABORTED",
@@ -57,7 +62,7 @@
         },
         "BatchGetDocuments": {
           "timeout_millis": 300000,
-          "retry_codes_name": "deadline_exceeded_resource_exhausted_internal_unavailable",
+          "retry_codes_name": "deadline_exceeded_internal_unavailable",
           "retry_params_name": "default"
         },
         "BeginTransaction": {
@@ -77,22 +82,22 @@
         },
         "RunQuery": {
           "timeout_millis": 300000,
-          "retry_codes_name": "deadline_exceeded_resource_exhausted_internal_unavailable",
+          "retry_codes_name": "deadline_exceeded_internal_unavailable",
           "retry_params_name": "default"
         },
         "ExecutePipeline": {
           "timeout_millis": 300000,
-          "retry_codes_name": "deadline_exceeded_resource_exhausted_internal_unavailable",
+          "retry_codes_name": "deadline_exceeded_internal_unavailable",
           "retry_params_name": "default"
         },
         "RunAggregationQuery": {
           "timeout_millis": 300000,
-          "retry_codes_name": "deadline_exceeded_resource_exhausted_internal_unavailable",
+          "retry_codes_name": "deadline_exceeded_internal_unavailable",
           "retry_params_name": "default"
         },
         "PartitionQuery": {
           "timeout_millis": 300000,
-          "retry_codes_name": "deadline_exceeded_resource_exhausted_internal_unavailable",
+          "retry_codes_name": "deadline_exceeded_internal_unavailable",
           "retry_params_name": "default"
         },
         "Write": {
diff --git a/handwritten/firestore/dev/src/v1beta1/firestore_client.ts b/handwritten/firestore/dev/src/v1beta1/firestore_client.ts
index 7d3b2fde416..77dfad22269 100644
--- a/handwritten/firestore/dev/src/v1beta1/firestore_client.ts
+++ b/handwritten/firestore/dev/src/v1beta1/firestore_client.ts
@@ -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.
diff --git a/handwritten/firestore/dev/test/gapic_firestore_admin_v1.ts b/handwritten/firestore/dev/test/gapic_firestore_admin_v1.ts
index cb1e4171f55..a64653426b6 100644
--- a/handwritten/firestore/dev/test/gapic_firestore_admin_v1.ts
+++ b/handwritten/firestore/dev/test/gapic_firestore_admin_v1.ts
@@ -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.
diff --git a/handwritten/firestore/dev/test/gapic_firestore_v1.ts b/handwritten/firestore/dev/test/gapic_firestore_v1.ts
index 6060a98713a..4e91b6d2de2 100644
--- a/handwritten/firestore/dev/test/gapic_firestore_v1.ts
+++ b/handwritten/firestore/dev/test/gapic_firestore_v1.ts
@@ -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.
diff --git a/handwritten/firestore/dev/test/gapic_firestore_v1beta1.ts b/handwritten/firestore/dev/test/gapic_firestore_v1beta1.ts
index 8ca18f6ba6f..802d93a2254 100644
--- a/handwritten/firestore/dev/test/gapic_firestore_v1beta1.ts
+++ b/handwritten/firestore/dev/test/gapic_firestore_v1beta1.ts
@@ -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.
diff --git a/handwritten/firestore/dev/test/index.ts b/handwritten/firestore/dev/test/index.ts
index 73359e14f78..b0971528683 100644
--- a/handwritten/firestore/dev/test/index.ts
+++ b/handwritten/firestore/dev/test/index.ts
@@ -1264,7 +1264,7 @@ describe('getAll() method', () => {
       [Status.NOT_FOUND]: 1,
       [Status.ALREADY_EXISTS]: 1,
       [Status.PERMISSION_DENIED]: 1,
-      [Status.RESOURCE_EXHAUSTED]: 5,
+      [Status.RESOURCE_EXHAUSTED]: 1,
       [Status.FAILED_PRECONDITION]: 1,
       [Status.ABORTED]: 1,
       [Status.OUT_OF_RANGE]: 1,
diff --git a/handwritten/firestore/types/protos/firestore_admin_v1_proto_api.d.ts b/handwritten/firestore/types/protos/firestore_admin_v1_proto_api.d.ts
index 4c92456901b..11132fe625d 100644
--- a/handwritten/firestore/types/protos/firestore_admin_v1_proto_api.d.ts
+++ b/handwritten/firestore/types/protos/firestore_admin_v1_proto_api.d.ts
@@ -244,6 +244,15 @@ export namespace google {
 
                     /** Database databaseEdition */
                     databaseEdition?: (google.firestore.admin.v1.Database.DatabaseEdition|null);
+
+                    /** Database realtimeUpdatesMode */
+                    realtimeUpdatesMode?: (google.firestore.admin.v1.RealtimeUpdatesMode|null);
+
+                    /** Database firestoreDataAccessMode */
+                    firestoreDataAccessMode?: (google.firestore.admin.v1.Database.DataAccessMode|null);
+
+                    /** Database mongodbCompatibleDataAccessMode */
+                    mongodbCompatibleDataAccessMode?: (google.firestore.admin.v1.Database.DataAccessMode|null);
                 }
 
                 /** Represents a Database. */
@@ -318,6 +327,15 @@ export namespace google {
                     /** Database databaseEdition. */
                     public databaseEdition: google.firestore.admin.v1.Database.DatabaseEdition;
 
+                    /** Database realtimeUpdatesMode. */
+                    public realtimeUpdatesMode: google.firestore.admin.v1.RealtimeUpdatesMode;
+
+                    /** Database firestoreDataAccessMode. */
+                    public firestoreDataAccessMode: google.firestore.admin.v1.Database.DataAccessMode;
+
+                    /** Database mongodbCompatibleDataAccessMode. */
+                    public mongodbCompatibleDataAccessMode: google.firestore.admin.v1.Database.DataAccessMode;
+
                     /**
                      * Creates a Database message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
@@ -732,8 +750,16 @@ export namespace google {
                     /** DatabaseEdition enum. */
                     type DatabaseEdition =
                         "DATABASE_EDITION_UNSPECIFIED"| "STANDARD"| "ENTERPRISE";
+
+                    /** DataAccessMode enum. */
+                    type DataAccessMode =
+                        "DATA_ACCESS_MODE_UNSPECIFIED"| "DATA_ACCESS_MODE_ENABLED"| "DATA_ACCESS_MODE_DISABLED";
                 }
 
+                /** RealtimeUpdatesMode enum. */
+                type RealtimeUpdatesMode =
+                    "REALTIME_UPDATES_MODE_UNSPECIFIED"| "REALTIME_UPDATES_MODE_ENABLED"| "REALTIME_UPDATES_MODE_DISABLED";
+
                 /** Properties of a Field. */
                 interface IField {
 
@@ -944,6 +970,9 @@ export namespace google {
 
                     /** Index shardCount */
                     shardCount?: (number|null);
+
+                    /** Index unique */
+                    unique?: (boolean|null);
                 }
 
                 /** Represents an Index. */
@@ -979,6 +1008,9 @@ export namespace google {
                     /** Index shardCount. */
                     public shardCount: number;
 
+                    /** Index unique. */
+                    public unique: boolean;
+
                     /**
                      * Creates an Index message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
diff --git a/handwritten/firestore/types/protos/firestore_v1_proto_api.d.ts b/handwritten/firestore/types/protos/firestore_v1_proto_api.d.ts
index e7ede770764..65ceec85751 100644
--- a/handwritten/firestore/types/protos/firestore_v1_proto_api.d.ts
+++ b/handwritten/firestore/types/protos/firestore_v1_proto_api.d.ts
@@ -519,6 +519,9 @@ export namespace google {
                 /** Value fieldReferenceValue */
                 fieldReferenceValue?: (string|null);
 
+                /** Value variableReferenceValue */
+                variableReferenceValue?: (string|null);
+
                 /** Value functionValue */
                 functionValue?: (google.firestore.v1.IFunction|null);
 
@@ -571,6 +574,9 @@ export namespace google {
                 /** Value fieldReferenceValue. */
                 public fieldReferenceValue?: (string|null);
 
+                /** Value variableReferenceValue. */
+                public variableReferenceValue?: (string|null);
+
                 /** Value functionValue. */
                 public functionValue?: (google.firestore.v1.IFunction|null);
 
@@ -578,7 +584,7 @@ export namespace google {
                 public pipelineValue?: (google.firestore.v1.IPipeline|null);
 
                 /** Value valueType. */
-                public valueType?: ("nullValue"|"booleanValue"|"integerValue"|"doubleValue"|"timestampValue"|"stringValue"|"bytesValue"|"referenceValue"|"geoPointValue"|"arrayValue"|"mapValue"|"fieldReferenceValue"|"functionValue"|"pipelineValue");
+                public valueType?: ("nullValue"|"booleanValue"|"integerValue"|"doubleValue"|"timestampValue"|"stringValue"|"bytesValue"|"referenceValue"|"geoPointValue"|"arrayValue"|"mapValue"|"fieldReferenceValue"|"variableReferenceValue"|"functionValue"|"pipelineValue");
 
                 /**
                  * Creates a Value message from a plain object. Also converts values to their respective internal types.