diff --git a/.jsdoc.js b/.jsdoc.js
index fa936266d..b9d1cc7e7 100644
--- a/.jsdoc.js
+++ b/.jsdoc.js
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 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 2024 Google LLC',
+    copyright: 'Copyright 2025 Google LLC',
     includeDate: false,
     sourceFiles: false,
     systemName: '@google-cloud/spanner',
diff --git a/protos/google/spanner/admin/instance/v1/common.proto b/protos/google/spanner/admin/instance/v1/common.proto
index 69717ec22..11e00368c 100644
--- a/protos/google/spanner/admin/instance/v1/common.proto
+++ b/protos/google/spanner/admin/instance/v1/common.proto
@@ -17,6 +17,7 @@ syntax = "proto3";
 package google.spanner.admin.instance.v1;
 
 import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
 import "google/protobuf/timestamp.proto";
 
 option csharp_namespace = "Google.Cloud.Spanner.Admin.Instance.V1";
diff --git a/protos/google/spanner/admin/instance/v1/spanner_instance_admin.proto b/protos/google/spanner/admin/instance/v1/spanner_instance_admin.proto
index ba6726b31..615a86c6f 100644
--- a/protos/google/spanner/admin/instance/v1/spanner_instance_admin.proto
+++ b/protos/google/spanner/admin/instance/v1/spanner_instance_admin.proto
@@ -64,6 +64,9 @@ service InstanceAdmin {
       "https://www.googleapis.com/auth/spanner.admin";
 
   // Lists the supported instance configurations for a given project.
+  //
+  // Returns both Google-managed configurations and user-managed
+  // configurations.
   rpc ListInstanceConfigs(ListInstanceConfigsRequest)
       returns (ListInstanceConfigsResponse) {
     option (google.api.http) = {
@@ -81,7 +84,7 @@ service InstanceAdmin {
   }
 
   // Creates an instance configuration and begins preparing it to be used. The
-  // returned [long-running operation][google.longrunning.Operation]
+  // returned long-running operation
   // can be used to track the progress of preparing the new
   // instance configuration. The instance configuration name is assigned by the
   // caller. If the named instance configuration already exists,
@@ -108,13 +111,13 @@ service InstanceAdmin {
   //   [reconciling][google.spanner.admin.instance.v1.InstanceConfig.reconciling]
   //   field becomes false. Its state becomes `READY`.
   //
-  // The returned [long-running operation][google.longrunning.Operation] will
+  // The returned long-running operation will
   // have a name of the format
   // `<instance_config_name>/operations/<operation_id>` and can be used to track
   // creation of the instance configuration. The
-  // [metadata][google.longrunning.Operation.metadata] field type is
+  // metadata field type is
   // [CreateInstanceConfigMetadata][google.spanner.admin.instance.v1.CreateInstanceConfigMetadata].
-  // The [response][google.longrunning.Operation.response] field type is
+  // The response field type is
   // [InstanceConfig][google.spanner.admin.instance.v1.InstanceConfig], if
   // successful.
   //
@@ -136,7 +139,7 @@ service InstanceAdmin {
   }
 
   // Updates an instance configuration. The returned
-  // [long-running operation][google.longrunning.Operation] can be used to track
+  // long-running operation can be used to track
   // the progress of updating the instance. If the named instance configuration
   // does not exist, returns `NOT_FOUND`.
   //
@@ -167,13 +170,13 @@ service InstanceAdmin {
   //   [reconciling][google.spanner.admin.instance.v1.InstanceConfig.reconciling]
   //   field becomes false.
   //
-  // The returned [long-running operation][google.longrunning.Operation] will
+  // The returned long-running operation will
   // have a name of the format
   // `<instance_config_name>/operations/<operation_id>` and can be used to track
   // the instance configuration modification.  The
-  // [metadata][google.longrunning.Operation.metadata] field type is
+  // metadata field type is
   // [UpdateInstanceConfigMetadata][google.spanner.admin.instance.v1.UpdateInstanceConfigMetadata].
-  // The [response][google.longrunning.Operation.response] field type is
+  // The response field type is
   // [InstanceConfig][google.spanner.admin.instance.v1.InstanceConfig], if
   // successful.
   //
@@ -208,12 +211,12 @@ service InstanceAdmin {
     option (google.api.method_signature) = "name";
   }
 
-  // Lists the user-managed instance configuration [long-running
-  // operations][google.longrunning.Operation] in the given project. An instance
+  // Lists the user-managed instance configuration long-running
+  // operations in the given project. An instance
   // configuration operation has a name of the form
   // `projects/<project>/instanceConfigs/<instance_config>/operations/<operation>`.
   // The long-running operation
-  // [metadata][google.longrunning.Operation.metadata] field type
+  // metadata field type
   // `metadata.type_url` describes the type of the metadata. Operations returned
   // include those that have completed/failed/canceled within the last 7 days,
   // and pending operations. Operations returned are ordered by
@@ -253,7 +256,7 @@ service InstanceAdmin {
   }
 
   // Creates an instance and begins preparing it to begin serving. The
-  // returned [long-running operation][google.longrunning.Operation]
+  // returned long-running operation
   // can be used to track the progress of preparing the new
   // instance. The instance name is assigned by the caller. If the
   // named instance already exists, `CreateInstance` returns
@@ -279,12 +282,12 @@ service InstanceAdmin {
   //   * The instance's allocated resource levels are readable via the API.
   //   * The instance's state becomes `READY`.
   //
-  // The returned [long-running operation][google.longrunning.Operation] will
+  // The returned long-running operation will
   // have a name of the format `<instance_name>/operations/<operation_id>` and
   // can be used to track creation of the instance.  The
-  // [metadata][google.longrunning.Operation.metadata] field type is
+  // metadata field type is
   // [CreateInstanceMetadata][google.spanner.admin.instance.v1.CreateInstanceMetadata].
-  // The [response][google.longrunning.Operation.response] field type is
+  // The response field type is
   // [Instance][google.spanner.admin.instance.v1.Instance], if successful.
   rpc CreateInstance(CreateInstanceRequest)
       returns (google.longrunning.Operation) {
@@ -300,8 +303,7 @@ service InstanceAdmin {
   }
 
   // Updates an instance, and begins allocating or releasing resources
-  // as requested. The returned [long-running
-  // operation][google.longrunning.Operation] can be used to track the
+  // as requested. The returned long-running operation can be used to track the
   // progress of updating the instance. If the named instance does not
   // exist, returns `NOT_FOUND`.
   //
@@ -329,12 +331,12 @@ service InstanceAdmin {
   //     tables.
   //   * The instance's new resource levels are readable via the API.
   //
-  // The returned [long-running operation][google.longrunning.Operation] will
+  // The returned long-running operation will
   // have a name of the format `<instance_name>/operations/<operation_id>` and
   // can be used to track the instance modification.  The
-  // [metadata][google.longrunning.Operation.metadata] field type is
+  // metadata field type is
   // [UpdateInstanceMetadata][google.spanner.admin.instance.v1.UpdateInstanceMetadata].
-  // The [response][google.longrunning.Operation.response] field type is
+  // The response field type is
   // [Instance][google.spanner.admin.instance.v1.Instance], if successful.
   //
   // Authorization requires `spanner.instances.update` permission on
@@ -423,7 +425,7 @@ service InstanceAdmin {
   }
 
   // Creates an instance partition and begins preparing it to be used. The
-  // returned [long-running operation][google.longrunning.Operation]
+  // returned long-running operation
   // can be used to track the progress of preparing the new instance partition.
   // The instance partition name is assigned by the caller. If the named
   // instance partition already exists, `CreateInstancePartition` returns
@@ -450,13 +452,13 @@ service InstanceAdmin {
   //     API.
   //   * The instance partition's state becomes `READY`.
   //
-  // The returned [long-running operation][google.longrunning.Operation] will
+  // The returned long-running operation will
   // have a name of the format
   // `<instance_partition_name>/operations/<operation_id>` and can be used to
   // track creation of the instance partition.  The
-  // [metadata][google.longrunning.Operation.metadata] field type is
+  // metadata field type is
   // [CreateInstancePartitionMetadata][google.spanner.admin.instance.v1.CreateInstancePartitionMetadata].
-  // The [response][google.longrunning.Operation.response] field type is
+  // The response field type is
   // [InstancePartition][google.spanner.admin.instance.v1.InstancePartition], if
   // successful.
   rpc CreateInstancePartition(CreateInstancePartitionRequest)
@@ -489,8 +491,7 @@ service InstanceAdmin {
   }
 
   // Updates an instance partition, and begins allocating or releasing resources
-  // as requested. The returned [long-running
-  // operation][google.longrunning.Operation] can be used to track the
+  // as requested. The returned long-running operation can be used to track the
   // progress of updating the instance partition. If the named instance
   // partition does not exist, returns `NOT_FOUND`.
   //
@@ -519,13 +520,13 @@ service InstanceAdmin {
   //     partition's tables.
   //   * The instance partition's new resource levels are readable via the API.
   //
-  // The returned [long-running operation][google.longrunning.Operation] will
+  // The returned long-running operation will
   // have a name of the format
   // `<instance_partition_name>/operations/<operation_id>` and can be used to
   // track the instance partition modification. The
-  // [metadata][google.longrunning.Operation.metadata] field type is
+  // metadata field type is
   // [UpdateInstancePartitionMetadata][google.spanner.admin.instance.v1.UpdateInstancePartitionMetadata].
-  // The [response][google.longrunning.Operation.response] field type is
+  // The response field type is
   // [InstancePartition][google.spanner.admin.instance.v1.InstancePartition], if
   // successful.
   //
@@ -545,12 +546,11 @@ service InstanceAdmin {
     };
   }
 
-  // Lists instance partition [long-running
-  // operations][google.longrunning.Operation] in the given instance.
+  // Lists instance partition long-running operations in the given instance.
   // An instance partition operation has a name of the form
   // `projects/<project>/instances/<instance>/instancePartitions/<instance_partition>/operations/<operation>`.
   // The long-running operation
-  // [metadata][google.longrunning.Operation.metadata] field type
+  // metadata field type
   // `metadata.type_url` describes the type of the metadata. Operations returned
   // include those that have completed/failed/canceled within the last 7 days,
   // and pending operations. Operations returned are ordered by
@@ -569,7 +569,7 @@ service InstanceAdmin {
   }
 
   // Moves an instance to the target instance configuration. You can use the
-  // returned [long-running operation][google.longrunning.Operation] to track
+  // returned long-running operation to track
   // the progress of moving the instance.
   //
   // `MoveInstance` returns `FAILED_PRECONDITION` if the instance meets any of
@@ -600,13 +600,13 @@ service InstanceAdmin {
   //     transaction abort rate. However, moving an instance doesn't cause any
   //     downtime.
   //
-  // The returned [long-running operation][google.longrunning.Operation] has
+  // The returned long-running operation has
   // a name of the format
   // `<instance_name>/operations/<operation_id>` and can be used to track
   // the move instance operation. The
-  // [metadata][google.longrunning.Operation.metadata] field type is
+  // metadata field type is
   // [MoveInstanceMetadata][google.spanner.admin.instance.v1.MoveInstanceMetadata].
-  // The [response][google.longrunning.Operation.response] field type is
+  // The response field type is
   // [Instance][google.spanner.admin.instance.v1.Instance],
   // if successful.
   // Cancelling the operation sets its metadata's
@@ -676,7 +676,7 @@ message ReplicaInfo {
     WITNESS = 3;
   }
 
-  // The location of the serving resources, e.g. "us-central1".
+  // The location of the serving resources, e.g., "us-central1".
   string location = 1;
 
   // The type of replica.
@@ -695,6 +695,8 @@ message InstanceConfig {
   option (google.api.resource) = {
     type: "spanner.googleapis.com/InstanceConfig"
     pattern: "projects/{project}/instanceConfigs/{instance_config}"
+    plural: "instanceConfigs"
+    singular: "instanceConfig"
   };
 
   // The type of this configuration.
@@ -702,10 +704,10 @@ message InstanceConfig {
     // Unspecified.
     TYPE_UNSPECIFIED = 0;
 
-    // Google managed configuration.
+    // Google-managed configuration.
     GOOGLE_MANAGED = 1;
 
-    // User managed configuration.
+    // User-managed configuration.
     USER_MANAGED = 2;
   }
 
@@ -722,6 +724,53 @@ message InstanceConfig {
     READY = 2;
   }
 
+  // Describes the availability for free instances to be created in an instance
+  // configuration.
+  enum FreeInstanceAvailability {
+    // Not specified.
+    FREE_INSTANCE_AVAILABILITY_UNSPECIFIED = 0;
+
+    // Indicates that free instances are available to be created in this
+    // instance configuration.
+    AVAILABLE = 1;
+
+    // Indicates that free instances are not supported in this instance
+    // configuration.
+    UNSUPPORTED = 2;
+
+    // Indicates that free instances are currently not available to be created
+    // in this instance configuration.
+    DISABLED = 3;
+
+    // Indicates that additional free instances cannot be created in this
+    // instance configuration because the project has reached its limit of free
+    // instances.
+    QUOTA_EXCEEDED = 4;
+  }
+
+  // Indicates the quorum type of this instance configuration.
+  enum QuorumType {
+    // Quorum type not specified.
+    QUORUM_TYPE_UNSPECIFIED = 0;
+
+    // An instance configuration tagged with `REGION` quorum type forms a write
+    // quorum in a single region.
+    REGION = 1;
+
+    // An instance configuration tagged with the `DUAL_REGION` quorum type forms
+    // a write quorum with exactly two read-write regions in a multi-region
+    // configuration.
+    //
+    // This instance configuration requires failover in the event of
+    // regional failures.
+    DUAL_REGION = 2;
+
+    // An instance configuration tagged with the `MULTI_REGION` quorum type
+    // forms a write quorum from replicas that are spread across more than one
+    // region in a multi-region configuration.
+    MULTI_REGION = 3;
+  }
+
   // A unique identifier for the instance configuration.  Values
   // are of the form
   // `projects/<project>/instanceConfigs/[a-z][-a-z0-9]*`.
@@ -738,17 +787,22 @@ message InstanceConfig {
 
   // The geographic placement of nodes in this instance configuration and their
   // replication properties.
+  //
+  // To create user-managed configurations, input
+  // `replicas` must include all replicas in `replicas` of the `base_config`
+  // and include one or more replicas in the `optional_replicas` of the
+  // `base_config`.
   repeated ReplicaInfo replicas = 3;
 
-  // Output only. The available optional replicas to choose from for user
-  // managed configurations. Populated for Google managed configurations.
+  // Output only. The available optional replicas to choose from for
+  // user-managed configurations. Populated for Google-managed configurations.
   repeated ReplicaInfo optional_replicas = 6
       [(google.api.field_behavior) = OUTPUT_ONLY];
 
   // Base configuration name, e.g. projects/<project_name>/instanceConfigs/nam3,
-  // based on which this configuration is created. Only set for user managed
+  // based on which this configuration is created. Only set for user-managed
   // configurations. `base_config` must refer to a configuration of type
-  // GOOGLE_MANAGED in the same project as this configuration.
+  // `GOOGLE_MANAGED` in the same project as this configuration.
   string base_config = 7 [(google.api.resource_reference) = {
     type: "spanner.googleapis.com/InstanceConfig"
   }];
@@ -801,6 +855,18 @@ message InstanceConfig {
   // Output only. The current instance configuration state. Applicable only for
   // `USER_MANAGED` configurations.
   State state = 11 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. Describes whether free instances are available to be created
+  // in this instance configuration.
+  FreeInstanceAvailability free_instance_availability = 12
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. The `QuorumType` of the instance configuration.
+  QuorumType quorum_type = 18 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. The storage limit in bytes per processing unit.
+  int64 storage_limit_per_processing_unit = 19
+      [(google.api.field_behavior) = OUTPUT_ONLY];
 }
 
 // ReplicaComputeCapacity describes the amount of server resources that are
@@ -877,7 +943,7 @@ message AutoscalingConfig {
     // Required. The target storage utilization percentage that the autoscaler
     // should be trying to achieve for the instance. This number is on a scale
     // from 0 (no utilization) to 100 (full utilization). The valid range is
-    // [10, 100] inclusive.
+    // [10, 99] inclusive.
     int32 storage_utilization_percent = 2
         [(google.api.field_behavior) = REQUIRED];
   }
@@ -939,6 +1005,8 @@ message Instance {
   option (google.api.resource) = {
     type: "spanner.googleapis.com/Instance"
     pattern: "projects/{project}/instances/{instance}"
+    plural: "instances"
+    singular: "instance"
   };
 
   // Indicates the current state of the instance.
@@ -956,6 +1024,24 @@ message Instance {
     READY = 2;
   }
 
+  // The type of this instance. The type can be used to distinguish product
+  // variants, that can affect aspects like: usage restrictions, quotas and
+  // billing. Currently this is used to distinguish FREE_INSTANCE vs PROVISIONED
+  // instances.
+  enum InstanceType {
+    // Not specified.
+    INSTANCE_TYPE_UNSPECIFIED = 0;
+
+    // Provisioned instances have dedicated resources, standard usage limits and
+    // support.
+    PROVISIONED = 1;
+
+    // Free instances provide no guarantee for dedicated resources,
+    // [node_count, processing_units] should be 0. They come
+    // with stricter usage limits and limited support.
+    FREE_INSTANCE = 2;
+  }
+
   // The edition selected for this instance. Different editions provide
   // different capabilities at different price points.
   enum Edition {
@@ -972,21 +1058,22 @@ message Instance {
     ENTERPRISE_PLUS = 3;
   }
 
-  // Indicates the default backup behavior for new databases within the
-  // instance.
+  // Indicates the
+  // [default backup
+  // schedule](https://cloud.google.com/spanner/docs/backup#default-backup-schedules)
+  // behavior for new databases within the instance.
   enum DefaultBackupScheduleType {
     // Not specified.
     DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED = 0;
 
-    // No default backup schedule will be created automatically on creation of a
-    // database within the instance.
+    // A default backup schedule isn't created automatically when a new database
+    // is created in the instance.
     NONE = 1;
 
-    // A default backup schedule will be created automatically on creation of a
-    // database within the instance. The default backup schedule creates a full
-    // backup every 24 hours and retains the backup for a period of 7 days. Once
-    // created, the default backup schedule can be edited/deleted similar to any
-    // other backup schedule.
+    // A default backup schedule is created automatically when a new database
+    // is created in the instance. The default backup schedule creates a full
+    // backup every 24 hours. These full backups are retained for 7 days.
+    // You can edit or delete the default backup schedule once it's created.
     AUTOMATIC = 2;
   }
 
@@ -1023,9 +1110,6 @@ message Instance {
   // This might be zero in API responses for instances that are not yet in the
   // `READY` state.
   //
-  // If the instance has varying node count across replicas (achieved by
-  // setting asymmetric_autoscaling_options in autoscaling config), the
-  // node_count here is the maximum node count across all replicas.
   //
   // For more information, see
   // [Compute capacity, nodes, and processing
@@ -1045,10 +1129,6 @@ message Instance {
   // This might be zero in API responses for instances that are not yet in the
   // `READY` state.
   //
-  // If the instance has varying processing units per replica
-  // (achieved by setting asymmetric_autoscaling_options in autoscaling config),
-  // the processing_units here is the maximum processing units across all
-  // replicas.
   //
   // For more information, see
   // [Compute capacity, nodes and processing
@@ -1098,6 +1178,9 @@ message Instance {
   // allow "_" in a future release.
   map<string, string> labels = 7;
 
+  // The `InstanceType` of the current instance.
+  InstanceType instance_type = 10;
+
   // Deprecated. This field is not populated.
   repeated string endpoint_uris = 8;
 
@@ -1109,18 +1192,22 @@ message Instance {
   google.protobuf.Timestamp update_time = 12
       [(google.api.field_behavior) = OUTPUT_ONLY];
 
+  // Free instance metadata. Only populated for free instances.
+  FreeInstanceMetadata free_instance_metadata = 13;
+
   // Optional. The `Edition` of the current instance.
   Edition edition = 20 [(google.api.field_behavior) = OPTIONAL];
 
-  // Optional. Controls the default backup behavior for new databases within the
-  // instance.
+  // Optional. Controls the default backup schedule behavior for new databases
+  // within the instance. By default, a backup schedule is created automatically
+  // when a new database is created in a new instance.
   //
-  // Note that `AUTOMATIC` is not permitted for free instances, as backups and
-  // backup schedules are not allowed for free instances.
+  // Note that the `AUTOMATIC` value isn't permitted for free instances,
+  // as backups and backup schedules aren't supported for free instances.
   //
   // In the `GetInstance` or `ListInstances` response, if the value of
-  // default_backup_schedule_type is unset or NONE, no default backup
-  // schedule will be created for new databases within the instance.
+  // `default_backup_schedule_type` isn't set, or set to `NONE`, Spanner doesn't
+  // create a default backup schedule for new databases in the instance.
   DefaultBackupScheduleType default_backup_schedule_type = 23
       [(google.api.field_behavior) = OPTIONAL];
 }
@@ -1175,7 +1262,7 @@ message GetInstanceConfigRequest {
 }
 
 // The request for
-// [CreateInstanceConfigRequest][InstanceAdmin.CreateInstanceConfigRequest].
+// [CreateInstanceConfig][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstanceConfig].
 message CreateInstanceConfigRequest {
   // Required. The name of the project in which to create the instance
   // configuration. Values are of the form `projects/<project>`.
@@ -1192,10 +1279,10 @@ message CreateInstanceConfigRequest {
   // conflicts with Google-managed configurations.
   string instance_config_id = 2 [(google.api.field_behavior) = REQUIRED];
 
-  // Required. The InstanceConfig proto of the configuration to create.
-  // instance_config.name must be
+  // Required. The `InstanceConfig` proto of the configuration to create.
+  // `instance_config.name` must be
   // `<parent>/instanceConfigs/<instance_config_id>`.
-  // instance_config.base_config must be a Google managed configuration name,
+  // `instance_config.base_config` must be a Google-managed configuration name,
   // e.g. <parent>/instanceConfigs/us-east1, <parent>/instanceConfigs/nam3.
   InstanceConfig instance_config = 3 [(google.api.field_behavior) = REQUIRED];
 
@@ -1205,7 +1292,7 @@ message CreateInstanceConfigRequest {
 }
 
 // The request for
-// [UpdateInstanceConfigRequest][InstanceAdmin.UpdateInstanceConfigRequest].
+// [UpdateInstanceConfig][google.spanner.admin.instance.v1.InstanceAdmin.UpdateInstanceConfig].
 message UpdateInstanceConfigRequest {
   // Required. The user instance configuration to update, which must always
   // include the instance configuration name. Otherwise, only fields mentioned
@@ -1231,7 +1318,7 @@ message UpdateInstanceConfigRequest {
 }
 
 // The request for
-// [DeleteInstanceConfigRequest][InstanceAdmin.DeleteInstanceConfigRequest].
+// [DeleteInstanceConfig][google.spanner.admin.instance.v1.InstanceAdmin.DeleteInstanceConfig].
 message DeleteInstanceConfigRequest {
   // Required. The name of the instance configuration to be deleted.
   // Values are of the form
@@ -1277,8 +1364,7 @@ message ListInstanceConfigOperationsRequest {
   // must be one of: `<`, `>`, `<=`, `>=`, `!=`, `=`, or `:`.
   // Colon `:` is the contains operator. Filter rules are not case sensitive.
   //
-  // The following fields in the [Operation][google.longrunning.Operation]
-  // are eligible for filtering:
+  // The following fields in the Operation are eligible for filtering:
   //
   //   * `name` - The name of the long-running operation
   //   * `done` - False if the operation is in progress, else true.
@@ -1329,10 +1415,10 @@ message ListInstanceConfigOperationsRequest {
 // The response for
 // [ListInstanceConfigOperations][google.spanner.admin.instance.v1.InstanceAdmin.ListInstanceConfigOperations].
 message ListInstanceConfigOperationsResponse {
-  // The list of matching instance configuration [long-running
-  // operations][google.longrunning.Operation]. Each operation's name will be
+  // The list of matching instance configuration long-running operations. Each
+  // operation's name will be
   // prefixed by the name of the instance configuration. The operation's
-  // [metadata][google.longrunning.Operation.metadata] field type
+  // metadata field type
   // `metadata.type_url` describes the type of the metadata.
   repeated google.longrunning.Operation operations = 1;
 
@@ -1530,6 +1616,41 @@ message UpdateInstanceMetadata {
   FulfillmentPeriod expected_fulfillment_period = 5;
 }
 
+// Free instance specific metadata that is kept even after an instance has been
+// upgraded for tracking purposes.
+message FreeInstanceMetadata {
+  // Allows users to change behavior when a free instance expires.
+  enum ExpireBehavior {
+    // Not specified.
+    EXPIRE_BEHAVIOR_UNSPECIFIED = 0;
+
+    // When the free instance expires, upgrade the instance to a provisioned
+    // instance.
+    FREE_TO_PROVISIONED = 1;
+
+    // When the free instance expires, disable the instance, and delete it
+    // after the grace period passes if it has not been upgraded.
+    REMOVE_AFTER_GRACE_PERIOD = 2;
+  }
+
+  // Output only. Timestamp after which the instance will either be upgraded or
+  // scheduled for deletion after a grace period. ExpireBehavior is used to
+  // choose between upgrading or scheduling the free instance for deletion. This
+  // timestamp is set during the creation of a free instance.
+  google.protobuf.Timestamp expire_time = 1
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. If present, the timestamp at which the free instance was
+  // upgraded to a provisioned instance.
+  google.protobuf.Timestamp upgrade_time = 2
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Specifies the expiration behavior of a free instance. The default of
+  // ExpireBehavior is `REMOVE_AFTER_GRACE_PERIOD`. This can be modified during
+  // or after creation, and before expiration.
+  ExpireBehavior expire_behavior = 3;
+}
+
 // Metadata type for the operation returned by
 // [CreateInstanceConfig][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstanceConfig].
 message CreateInstanceConfigMetadata {
@@ -1566,6 +1687,8 @@ message InstancePartition {
   option (google.api.resource) = {
     type: "spanner.googleapis.com/InstancePartition"
     pattern: "projects/{project}/instances/{instance}/instancePartitions/{instance_partition}"
+    plural: "instancePartitions"
+    singular: "instancePartition"
   };
 
   // Indicates the current state of the instance partition.
@@ -1607,15 +1730,16 @@ message InstancePartition {
   string display_name = 3 [(google.api.field_behavior) = REQUIRED];
 
   // Compute capacity defines amount of server and storage resources that are
-  // available to the databases in an instance partition. At most one of either
-  // node_count or processing_units should be present in the message. See [the
-  // documentation](https://cloud.google.com/spanner/docs/compute-capacity)
-  // for more information about nodes and processing units.
+  // available to the databases in an instance partition. At most, one of either
+  // `node_count` or` processing_units` should be present in the message. For
+  // more information, see
+  // [Compute capacity, nodes, and processing
+  // units](https://cloud.google.com/spanner/docs/compute-capacity).
   oneof compute_capacity {
     // The number of nodes allocated to this instance partition.
     //
-    // Users can set the node_count field to specify the target number of nodes
-    // allocated to the instance partition.
+    // Users can set the `node_count` field to specify the target number of
+    // nodes allocated to the instance partition.
     //
     // This may be zero in API responses for instance partitions that are not
     // yet in state `READY`.
@@ -1623,11 +1747,11 @@ message InstancePartition {
 
     // The number of processing units allocated to this instance partition.
     //
-    // Users can set the processing_units field to specify the target number of
-    // processing units allocated to the instance partition.
+    // Users can set the `processing_units` field to specify the target number
+    // of processing units allocated to the instance partition.
     //
-    // This may be zero in API responses for instance partitions that are not
-    // yet in state `READY`.
+    // This might be zero in API responses for instance partitions that are not
+    // yet in the `READY` state.
     int32 processing_units = 6;
   }
 
@@ -1650,12 +1774,13 @@ message InstancePartition {
   repeated string referencing_databases = 10
       [(google.api.field_behavior) = OUTPUT_ONLY];
 
+  // Output only. Deprecated: This field is not populated.
   // Output only. The names of the backups that reference this instance
   // partition. Referencing backups should share the parent instance. The
   // existence of any referencing backup prevents the instance partition from
   // being deleted.
   repeated string referencing_backups = 11
-      [(google.api.field_behavior) = OUTPUT_ONLY];
+      [deprecated = true, (google.api.field_behavior) = OUTPUT_ONLY];
 
   // Used for optimistic concurrency control as a way
   // to help prevent simultaneous updates of a instance partition from
@@ -1793,7 +1918,9 @@ message UpdateInstancePartitionMetadata {
 // [ListInstancePartitions][google.spanner.admin.instance.v1.InstanceAdmin.ListInstancePartitions].
 message ListInstancePartitionsRequest {
   // Required. The instance whose instance partitions should be listed. Values
-  // are of the form `projects/<project>/instances/<instance>`.
+  // are of the form `projects/<project>/instances/<instance>`. Use `{instance}
+  // = '-'` to list instance partitions for all Instances in a project, e.g.,
+  // `projects/myproject/instances/-`.
   string parent = 1 [
     (google.api.field_behavior) = REQUIRED,
     (google.api.resource_reference) = {
@@ -1832,9 +1959,9 @@ message ListInstancePartitionsResponse {
   // call to fetch more of the matching instance partitions.
   string next_page_token = 2;
 
-  // The list of unreachable instance partitions.
-  // It includes the names of instance partitions whose metadata could
-  // not be retrieved within
+  // The list of unreachable instances or instance partitions.
+  // It includes the names of instances or instance partitions whose metadata
+  // could not be retrieved within
   // [instance_partition_deadline][google.spanner.admin.instance.v1.ListInstancePartitionsRequest.instance_partition_deadline].
   repeated string unreachable = 3;
 }
@@ -1859,8 +1986,7 @@ message ListInstancePartitionOperationsRequest {
   // must be one of: `<`, `>`, `<=`, `>=`, `!=`, `=`, or `:`.
   // Colon `:` is the contains operator. Filter rules are not case sensitive.
   //
-  // The following fields in the [Operation][google.longrunning.Operation]
-  // are eligible for filtering:
+  // The following fields in the Operation are eligible for filtering:
   //
   //   * `name` - The name of the long-running operation
   //   * `done` - False if the operation is in progress, else true.
@@ -1910,7 +2036,8 @@ message ListInstancePartitionOperationsRequest {
   // Optional. Deadline used while retrieving metadata for instance partition
   // operations. Instance partitions whose operation metadata cannot be
   // retrieved within this deadline will be added to
-  // [unreachable][ListInstancePartitionOperationsResponse.unreachable] in
+  // [unreachable_instance_partitions][google.spanner.admin.instance.v1.ListInstancePartitionOperationsResponse.unreachable_instance_partitions]
+  // in
   // [ListInstancePartitionOperationsResponse][google.spanner.admin.instance.v1.ListInstancePartitionOperationsResponse].
   google.protobuf.Timestamp instance_partition_deadline = 5
       [(google.api.field_behavior) = OPTIONAL];
@@ -1919,10 +2046,10 @@ message ListInstancePartitionOperationsRequest {
 // The response for
 // [ListInstancePartitionOperations][google.spanner.admin.instance.v1.InstanceAdmin.ListInstancePartitionOperations].
 message ListInstancePartitionOperationsResponse {
-  // The list of matching instance partition [long-running
-  // operations][google.longrunning.Operation]. Each operation's name will be
+  // The list of matching instance partition long-running operations. Each
+  // operation's name will be
   // prefixed by the instance partition's name. The operation's
-  // [metadata][google.longrunning.Operation.metadata] field type
+  // metadata field type
   // `metadata.type_url` describes the type of the metadata.
   repeated google.longrunning.Operation operations = 1;
 
diff --git a/protos/google/spanner/v1/type.proto b/protos/google/spanner/v1/type.proto
index 734cfb54c..a8a73bf31 100644
--- a/protos/google/spanner/v1/type.proto
+++ b/protos/google/spanner/v1/type.proto
@@ -175,6 +175,10 @@ enum TypeCode {
   // For example, `P1Y2M3DT4H5M6.5S` represents time duration of 1 year, 2
   // months, 3 days, 4 hours, 5 minutes, and 6.5 seconds.
   INTERVAL = 16;
+
+  // Encoded as `string`, in lower-case hexa-decimal format, as described
+  // in RFC 9562, section 4.
+  UUID = 17;
 }
 
 // `TypeAnnotationCode` is used as a part of [Type][google.spanner.v1.Type] to
diff --git a/protos/protos.d.ts b/protos/protos.d.ts
index 2ada44c72..546770b40 100644
--- a/protos/protos.d.ts
+++ b/protos/protos.d.ts
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -13841,6 +13841,15 @@ export namespace google {
 
                         /** InstanceConfig state */
                         state?: (google.spanner.admin.instance.v1.InstanceConfig.State|keyof typeof google.spanner.admin.instance.v1.InstanceConfig.State|null);
+
+                        /** InstanceConfig freeInstanceAvailability */
+                        freeInstanceAvailability?: (google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability|keyof typeof google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability|null);
+
+                        /** InstanceConfig quorumType */
+                        quorumType?: (google.spanner.admin.instance.v1.InstanceConfig.QuorumType|keyof typeof google.spanner.admin.instance.v1.InstanceConfig.QuorumType|null);
+
+                        /** InstanceConfig storageLimitPerProcessingUnit */
+                        storageLimitPerProcessingUnit?: (number|Long|string|null);
                     }
 
                     /** Represents an InstanceConfig. */
@@ -13885,6 +13894,15 @@ export namespace google {
                         /** InstanceConfig state. */
                         public state: (google.spanner.admin.instance.v1.InstanceConfig.State|keyof typeof google.spanner.admin.instance.v1.InstanceConfig.State);
 
+                        /** InstanceConfig freeInstanceAvailability. */
+                        public freeInstanceAvailability: (google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability|keyof typeof google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability);
+
+                        /** InstanceConfig quorumType. */
+                        public quorumType: (google.spanner.admin.instance.v1.InstanceConfig.QuorumType|keyof typeof google.spanner.admin.instance.v1.InstanceConfig.QuorumType);
+
+                        /** InstanceConfig storageLimitPerProcessingUnit. */
+                        public storageLimitPerProcessingUnit: (number|Long|string);
+
                         /**
                          * Creates a new InstanceConfig instance using the specified properties.
                          * @param [properties] Properties to set
@@ -13978,6 +13996,23 @@ export namespace google {
                             CREATING = 1,
                             READY = 2
                         }
+
+                        /** FreeInstanceAvailability enum. */
+                        enum FreeInstanceAvailability {
+                            FREE_INSTANCE_AVAILABILITY_UNSPECIFIED = 0,
+                            AVAILABLE = 1,
+                            UNSUPPORTED = 2,
+                            DISABLED = 3,
+                            QUOTA_EXCEEDED = 4
+                        }
+
+                        /** QuorumType enum. */
+                        enum QuorumType {
+                            QUORUM_TYPE_UNSPECIFIED = 0,
+                            REGION = 1,
+                            DUAL_REGION = 2,
+                            MULTI_REGION = 3
+                        }
                     }
 
                     /** Properties of a ReplicaComputeCapacity. */
@@ -14667,6 +14702,9 @@ export namespace google {
                         /** Instance labels */
                         labels?: ({ [k: string]: string }|null);
 
+                        /** Instance instanceType */
+                        instanceType?: (google.spanner.admin.instance.v1.Instance.InstanceType|keyof typeof google.spanner.admin.instance.v1.Instance.InstanceType|null);
+
                         /** Instance endpointUris */
                         endpointUris?: (string[]|null);
 
@@ -14676,6 +14714,9 @@ export namespace google {
                         /** Instance updateTime */
                         updateTime?: (google.protobuf.ITimestamp|null);
 
+                        /** Instance freeInstanceMetadata */
+                        freeInstanceMetadata?: (google.spanner.admin.instance.v1.IFreeInstanceMetadata|null);
+
                         /** Instance edition */
                         edition?: (google.spanner.admin.instance.v1.Instance.Edition|keyof typeof google.spanner.admin.instance.v1.Instance.Edition|null);
 
@@ -14719,6 +14760,9 @@ export namespace google {
                         /** Instance labels. */
                         public labels: { [k: string]: string };
 
+                        /** Instance instanceType. */
+                        public instanceType: (google.spanner.admin.instance.v1.Instance.InstanceType|keyof typeof google.spanner.admin.instance.v1.Instance.InstanceType);
+
                         /** Instance endpointUris. */
                         public endpointUris: string[];
 
@@ -14728,6 +14772,9 @@ export namespace google {
                         /** Instance updateTime. */
                         public updateTime?: (google.protobuf.ITimestamp|null);
 
+                        /** Instance freeInstanceMetadata. */
+                        public freeInstanceMetadata?: (google.spanner.admin.instance.v1.IFreeInstanceMetadata|null);
+
                         /** Instance edition. */
                         public edition: (google.spanner.admin.instance.v1.Instance.Edition|keyof typeof google.spanner.admin.instance.v1.Instance.Edition);
 
@@ -14821,6 +14868,13 @@ export namespace google {
                             READY = 2
                         }
 
+                        /** InstanceType enum. */
+                        enum InstanceType {
+                            INSTANCE_TYPE_UNSPECIFIED = 0,
+                            PROVISIONED = 1,
+                            FREE_INSTANCE = 2
+                        }
+
                         /** Edition enum. */
                         enum Edition {
                             EDITION_UNSPECIFIED = 0,
@@ -16581,6 +16635,125 @@ export namespace google {
                         public static getTypeUrl(typeUrlPrefix?: string): string;
                     }
 
+                    /** Properties of a FreeInstanceMetadata. */
+                    interface IFreeInstanceMetadata {
+
+                        /** FreeInstanceMetadata expireTime */
+                        expireTime?: (google.protobuf.ITimestamp|null);
+
+                        /** FreeInstanceMetadata upgradeTime */
+                        upgradeTime?: (google.protobuf.ITimestamp|null);
+
+                        /** FreeInstanceMetadata expireBehavior */
+                        expireBehavior?: (google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior|keyof typeof google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior|null);
+                    }
+
+                    /** Represents a FreeInstanceMetadata. */
+                    class FreeInstanceMetadata implements IFreeInstanceMetadata {
+
+                        /**
+                         * Constructs a new FreeInstanceMetadata.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.spanner.admin.instance.v1.IFreeInstanceMetadata);
+
+                        /** FreeInstanceMetadata expireTime. */
+                        public expireTime?: (google.protobuf.ITimestamp|null);
+
+                        /** FreeInstanceMetadata upgradeTime. */
+                        public upgradeTime?: (google.protobuf.ITimestamp|null);
+
+                        /** FreeInstanceMetadata expireBehavior. */
+                        public expireBehavior: (google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior|keyof typeof google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior);
+
+                        /**
+                         * Creates a new FreeInstanceMetadata instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns FreeInstanceMetadata instance
+                         */
+                        public static create(properties?: google.spanner.admin.instance.v1.IFreeInstanceMetadata): google.spanner.admin.instance.v1.FreeInstanceMetadata;
+
+                        /**
+                         * Encodes the specified FreeInstanceMetadata message. Does not implicitly {@link google.spanner.admin.instance.v1.FreeInstanceMetadata.verify|verify} messages.
+                         * @param message FreeInstanceMetadata message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.spanner.admin.instance.v1.IFreeInstanceMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified FreeInstanceMetadata message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.FreeInstanceMetadata.verify|verify} messages.
+                         * @param message FreeInstanceMetadata message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.spanner.admin.instance.v1.IFreeInstanceMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a FreeInstanceMetadata message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns FreeInstanceMetadata
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.admin.instance.v1.FreeInstanceMetadata;
+
+                        /**
+                         * Decodes a FreeInstanceMetadata message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns FreeInstanceMetadata
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.admin.instance.v1.FreeInstanceMetadata;
+
+                        /**
+                         * Verifies a FreeInstanceMetadata message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a FreeInstanceMetadata message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns FreeInstanceMetadata
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.spanner.admin.instance.v1.FreeInstanceMetadata;
+
+                        /**
+                         * Creates a plain object from a FreeInstanceMetadata message. Also converts values to other types if specified.
+                         * @param message FreeInstanceMetadata
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.spanner.admin.instance.v1.FreeInstanceMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this FreeInstanceMetadata to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for FreeInstanceMetadata
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
+                    namespace FreeInstanceMetadata {
+
+                        /** ExpireBehavior enum. */
+                        enum ExpireBehavior {
+                            EXPIRE_BEHAVIOR_UNSPECIFIED = 0,
+                            FREE_TO_PROVISIONED = 1,
+                            REMOVE_AFTER_GRACE_PERIOD = 2
+                        }
+                    }
+
                     /** Properties of a CreateInstanceConfigMetadata. */
                     interface ICreateInstanceConfigMetadata {
 
@@ -34373,7 +34546,8 @@ export namespace google {
                 JSON = 11,
                 PROTO = 13,
                 ENUM = 14,
-                INTERVAL = 16
+                INTERVAL = 16,
+                UUID = 17
             }
 
             /** TypeAnnotationCode enum. */
diff --git a/protos/protos.js b/protos/protos.js
index 6a0b1f694..0ea60ab00 100644
--- a/protos/protos.js
+++ b/protos/protos.js
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -34778,6 +34778,9 @@
                              * @property {Array.<string>|null} [leaderOptions] InstanceConfig leaderOptions
                              * @property {boolean|null} [reconciling] InstanceConfig reconciling
                              * @property {google.spanner.admin.instance.v1.InstanceConfig.State|null} [state] InstanceConfig state
+                             * @property {google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability|null} [freeInstanceAvailability] InstanceConfig freeInstanceAvailability
+                             * @property {google.spanner.admin.instance.v1.InstanceConfig.QuorumType|null} [quorumType] InstanceConfig quorumType
+                             * @property {number|Long|null} [storageLimitPerProcessingUnit] InstanceConfig storageLimitPerProcessingUnit
                              */
     
                             /**
@@ -34887,6 +34890,30 @@
                              */
                             InstanceConfig.prototype.state = 0;
     
+                            /**
+                             * InstanceConfig freeInstanceAvailability.
+                             * @member {google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability} freeInstanceAvailability
+                             * @memberof google.spanner.admin.instance.v1.InstanceConfig
+                             * @instance
+                             */
+                            InstanceConfig.prototype.freeInstanceAvailability = 0;
+    
+                            /**
+                             * InstanceConfig quorumType.
+                             * @member {google.spanner.admin.instance.v1.InstanceConfig.QuorumType} quorumType
+                             * @memberof google.spanner.admin.instance.v1.InstanceConfig
+                             * @instance
+                             */
+                            InstanceConfig.prototype.quorumType = 0;
+    
+                            /**
+                             * InstanceConfig storageLimitPerProcessingUnit.
+                             * @member {number|Long} storageLimitPerProcessingUnit
+                             * @memberof google.spanner.admin.instance.v1.InstanceConfig
+                             * @instance
+                             */
+                            InstanceConfig.prototype.storageLimitPerProcessingUnit = $util.Long ? $util.Long.fromBits(0,0,false) : 0;
+    
                             /**
                              * Creates a new InstanceConfig instance using the specified properties.
                              * @function create
@@ -34937,6 +34964,12 @@
                                     writer.uint32(/* id 10, wireType 0 =*/80).bool(message.reconciling);
                                 if (message.state != null && Object.hasOwnProperty.call(message, "state"))
                                     writer.uint32(/* id 11, wireType 0 =*/88).int32(message.state);
+                                if (message.freeInstanceAvailability != null && Object.hasOwnProperty.call(message, "freeInstanceAvailability"))
+                                    writer.uint32(/* id 12, wireType 0 =*/96).int32(message.freeInstanceAvailability);
+                                if (message.quorumType != null && Object.hasOwnProperty.call(message, "quorumType"))
+                                    writer.uint32(/* id 18, wireType 0 =*/144).int32(message.quorumType);
+                                if (message.storageLimitPerProcessingUnit != null && Object.hasOwnProperty.call(message, "storageLimitPerProcessingUnit"))
+                                    writer.uint32(/* id 19, wireType 0 =*/152).int64(message.storageLimitPerProcessingUnit);
                                 return writer;
                             };
     
@@ -35040,6 +35073,18 @@
                                             message.state = reader.int32();
                                             break;
                                         }
+                                    case 12: {
+                                            message.freeInstanceAvailability = reader.int32();
+                                            break;
+                                        }
+                                    case 18: {
+                                            message.quorumType = reader.int32();
+                                            break;
+                                        }
+                                    case 19: {
+                                            message.storageLimitPerProcessingUnit = reader.int64();
+                                            break;
+                                        }
                                     default:
                                         reader.skipType(tag & 7);
                                         break;
@@ -35141,6 +35186,30 @@
                                     case 2:
                                         break;
                                     }
+                                if (message.freeInstanceAvailability != null && message.hasOwnProperty("freeInstanceAvailability"))
+                                    switch (message.freeInstanceAvailability) {
+                                    default:
+                                        return "freeInstanceAvailability: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                    case 3:
+                                    case 4:
+                                        break;
+                                    }
+                                if (message.quorumType != null && message.hasOwnProperty("quorumType"))
+                                    switch (message.quorumType) {
+                                    default:
+                                        return "quorumType: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                    case 3:
+                                        break;
+                                    }
+                                if (message.storageLimitPerProcessingUnit != null && message.hasOwnProperty("storageLimitPerProcessingUnit"))
+                                    if (!$util.isInteger(message.storageLimitPerProcessingUnit) && !(message.storageLimitPerProcessingUnit && $util.isInteger(message.storageLimitPerProcessingUnit.low) && $util.isInteger(message.storageLimitPerProcessingUnit.high)))
+                                        return "storageLimitPerProcessingUnit: integer|Long expected";
                                 return null;
                             };
     
@@ -35240,6 +35309,67 @@
                                     message.state = 2;
                                     break;
                                 }
+                                switch (object.freeInstanceAvailability) {
+                                default:
+                                    if (typeof object.freeInstanceAvailability === "number") {
+                                        message.freeInstanceAvailability = object.freeInstanceAvailability;
+                                        break;
+                                    }
+                                    break;
+                                case "FREE_INSTANCE_AVAILABILITY_UNSPECIFIED":
+                                case 0:
+                                    message.freeInstanceAvailability = 0;
+                                    break;
+                                case "AVAILABLE":
+                                case 1:
+                                    message.freeInstanceAvailability = 1;
+                                    break;
+                                case "UNSUPPORTED":
+                                case 2:
+                                    message.freeInstanceAvailability = 2;
+                                    break;
+                                case "DISABLED":
+                                case 3:
+                                    message.freeInstanceAvailability = 3;
+                                    break;
+                                case "QUOTA_EXCEEDED":
+                                case 4:
+                                    message.freeInstanceAvailability = 4;
+                                    break;
+                                }
+                                switch (object.quorumType) {
+                                default:
+                                    if (typeof object.quorumType === "number") {
+                                        message.quorumType = object.quorumType;
+                                        break;
+                                    }
+                                    break;
+                                case "QUORUM_TYPE_UNSPECIFIED":
+                                case 0:
+                                    message.quorumType = 0;
+                                    break;
+                                case "REGION":
+                                case 1:
+                                    message.quorumType = 1;
+                                    break;
+                                case "DUAL_REGION":
+                                case 2:
+                                    message.quorumType = 2;
+                                    break;
+                                case "MULTI_REGION":
+                                case 3:
+                                    message.quorumType = 3;
+                                    break;
+                                }
+                                if (object.storageLimitPerProcessingUnit != null)
+                                    if ($util.Long)
+                                        (message.storageLimitPerProcessingUnit = $util.Long.fromValue(object.storageLimitPerProcessingUnit)).unsigned = false;
+                                    else if (typeof object.storageLimitPerProcessingUnit === "string")
+                                        message.storageLimitPerProcessingUnit = parseInt(object.storageLimitPerProcessingUnit, 10);
+                                    else if (typeof object.storageLimitPerProcessingUnit === "number")
+                                        message.storageLimitPerProcessingUnit = object.storageLimitPerProcessingUnit;
+                                    else if (typeof object.storageLimitPerProcessingUnit === "object")
+                                        message.storageLimitPerProcessingUnit = new $util.LongBits(object.storageLimitPerProcessingUnit.low >>> 0, object.storageLimitPerProcessingUnit.high >>> 0).toNumber();
                                 return message;
                             };
     
@@ -35271,6 +35401,13 @@
                                     object.etag = "";
                                     object.reconciling = false;
                                     object.state = options.enums === String ? "STATE_UNSPECIFIED" : 0;
+                                    object.freeInstanceAvailability = options.enums === String ? "FREE_INSTANCE_AVAILABILITY_UNSPECIFIED" : 0;
+                                    object.quorumType = options.enums === String ? "QUORUM_TYPE_UNSPECIFIED" : 0;
+                                    if ($util.Long) {
+                                        var long = new $util.Long(0, 0, false);
+                                        object.storageLimitPerProcessingUnit = options.longs === String ? long.toString() : options.longs === Number ? long.toNumber() : long;
+                                    } else
+                                        object.storageLimitPerProcessingUnit = options.longs === String ? "0" : 0;
                                 }
                                 if (message.name != null && message.hasOwnProperty("name"))
                                     object.name = message.name;
@@ -35307,6 +35444,15 @@
                                     object.reconciling = message.reconciling;
                                 if (message.state != null && message.hasOwnProperty("state"))
                                     object.state = options.enums === String ? $root.google.spanner.admin.instance.v1.InstanceConfig.State[message.state] === undefined ? message.state : $root.google.spanner.admin.instance.v1.InstanceConfig.State[message.state] : message.state;
+                                if (message.freeInstanceAvailability != null && message.hasOwnProperty("freeInstanceAvailability"))
+                                    object.freeInstanceAvailability = options.enums === String ? $root.google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability[message.freeInstanceAvailability] === undefined ? message.freeInstanceAvailability : $root.google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability[message.freeInstanceAvailability] : message.freeInstanceAvailability;
+                                if (message.quorumType != null && message.hasOwnProperty("quorumType"))
+                                    object.quorumType = options.enums === String ? $root.google.spanner.admin.instance.v1.InstanceConfig.QuorumType[message.quorumType] === undefined ? message.quorumType : $root.google.spanner.admin.instance.v1.InstanceConfig.QuorumType[message.quorumType] : message.quorumType;
+                                if (message.storageLimitPerProcessingUnit != null && message.hasOwnProperty("storageLimitPerProcessingUnit"))
+                                    if (typeof message.storageLimitPerProcessingUnit === "number")
+                                        object.storageLimitPerProcessingUnit = options.longs === String ? String(message.storageLimitPerProcessingUnit) : message.storageLimitPerProcessingUnit;
+                                    else
+                                        object.storageLimitPerProcessingUnit = options.longs === String ? $util.Long.prototype.toString.call(message.storageLimitPerProcessingUnit) : options.longs === Number ? new $util.LongBits(message.storageLimitPerProcessingUnit.low >>> 0, message.storageLimitPerProcessingUnit.high >>> 0).toNumber() : message.storageLimitPerProcessingUnit;
                                 return object;
                             };
     
@@ -35368,6 +35514,44 @@
                                 return values;
                             })();
     
+                            /**
+                             * FreeInstanceAvailability enum.
+                             * @name google.spanner.admin.instance.v1.InstanceConfig.FreeInstanceAvailability
+                             * @enum {number}
+                             * @property {number} FREE_INSTANCE_AVAILABILITY_UNSPECIFIED=0 FREE_INSTANCE_AVAILABILITY_UNSPECIFIED value
+                             * @property {number} AVAILABLE=1 AVAILABLE value
+                             * @property {number} UNSUPPORTED=2 UNSUPPORTED value
+                             * @property {number} DISABLED=3 DISABLED value
+                             * @property {number} QUOTA_EXCEEDED=4 QUOTA_EXCEEDED value
+                             */
+                            InstanceConfig.FreeInstanceAvailability = (function() {
+                                var valuesById = {}, values = Object.create(valuesById);
+                                values[valuesById[0] = "FREE_INSTANCE_AVAILABILITY_UNSPECIFIED"] = 0;
+                                values[valuesById[1] = "AVAILABLE"] = 1;
+                                values[valuesById[2] = "UNSUPPORTED"] = 2;
+                                values[valuesById[3] = "DISABLED"] = 3;
+                                values[valuesById[4] = "QUOTA_EXCEEDED"] = 4;
+                                return values;
+                            })();
+    
+                            /**
+                             * QuorumType enum.
+                             * @name google.spanner.admin.instance.v1.InstanceConfig.QuorumType
+                             * @enum {number}
+                             * @property {number} QUORUM_TYPE_UNSPECIFIED=0 QUORUM_TYPE_UNSPECIFIED value
+                             * @property {number} REGION=1 REGION value
+                             * @property {number} DUAL_REGION=2 DUAL_REGION value
+                             * @property {number} MULTI_REGION=3 MULTI_REGION value
+                             */
+                            InstanceConfig.QuorumType = (function() {
+                                var valuesById = {}, values = Object.create(valuesById);
+                                values[valuesById[0] = "QUORUM_TYPE_UNSPECIFIED"] = 0;
+                                values[valuesById[1] = "REGION"] = 1;
+                                values[valuesById[2] = "DUAL_REGION"] = 2;
+                                values[valuesById[3] = "MULTI_REGION"] = 3;
+                                return values;
+                            })();
+    
                             return InstanceConfig;
                         })();
     
@@ -36960,9 +37144,11 @@
                              * @property {google.spanner.admin.instance.v1.IAutoscalingConfig|null} [autoscalingConfig] Instance autoscalingConfig
                              * @property {google.spanner.admin.instance.v1.Instance.State|null} [state] Instance state
                              * @property {Object.<string,string>|null} [labels] Instance labels
+                             * @property {google.spanner.admin.instance.v1.Instance.InstanceType|null} [instanceType] Instance instanceType
                              * @property {Array.<string>|null} [endpointUris] Instance endpointUris
                              * @property {google.protobuf.ITimestamp|null} [createTime] Instance createTime
                              * @property {google.protobuf.ITimestamp|null} [updateTime] Instance updateTime
+                             * @property {google.spanner.admin.instance.v1.IFreeInstanceMetadata|null} [freeInstanceMetadata] Instance freeInstanceMetadata
                              * @property {google.spanner.admin.instance.v1.Instance.Edition|null} [edition] Instance edition
                              * @property {google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType|null} [defaultBackupScheduleType] Instance defaultBackupScheduleType
                              */
@@ -37057,6 +37243,14 @@
                              */
                             Instance.prototype.labels = $util.emptyObject;
     
+                            /**
+                             * Instance instanceType.
+                             * @member {google.spanner.admin.instance.v1.Instance.InstanceType} instanceType
+                             * @memberof google.spanner.admin.instance.v1.Instance
+                             * @instance
+                             */
+                            Instance.prototype.instanceType = 0;
+    
                             /**
                              * Instance endpointUris.
                              * @member {Array.<string>} endpointUris
@@ -37081,6 +37275,14 @@
                              */
                             Instance.prototype.updateTime = null;
     
+                            /**
+                             * Instance freeInstanceMetadata.
+                             * @member {google.spanner.admin.instance.v1.IFreeInstanceMetadata|null|undefined} freeInstanceMetadata
+                             * @memberof google.spanner.admin.instance.v1.Instance
+                             * @instance
+                             */
+                            Instance.prototype.freeInstanceMetadata = null;
+    
                             /**
                              * Instance edition.
                              * @member {google.spanner.admin.instance.v1.Instance.Edition} edition
@@ -37139,10 +37341,14 @@
                                         writer.uint32(/* id 8, wireType 2 =*/66).string(message.endpointUris[i]);
                                 if (message.processingUnits != null && Object.hasOwnProperty.call(message, "processingUnits"))
                                     writer.uint32(/* id 9, wireType 0 =*/72).int32(message.processingUnits);
+                                if (message.instanceType != null && Object.hasOwnProperty.call(message, "instanceType"))
+                                    writer.uint32(/* id 10, wireType 0 =*/80).int32(message.instanceType);
                                 if (message.createTime != null && Object.hasOwnProperty.call(message, "createTime"))
                                     $root.google.protobuf.Timestamp.encode(message.createTime, writer.uint32(/* id 11, wireType 2 =*/90).fork()).ldelim();
                                 if (message.updateTime != null && Object.hasOwnProperty.call(message, "updateTime"))
                                     $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 12, wireType 2 =*/98).fork()).ldelim();
+                                if (message.freeInstanceMetadata != null && Object.hasOwnProperty.call(message, "freeInstanceMetadata"))
+                                    $root.google.spanner.admin.instance.v1.FreeInstanceMetadata.encode(message.freeInstanceMetadata, writer.uint32(/* id 13, wireType 2 =*/106).fork()).ldelim();
                                 if (message.autoscalingConfig != null && Object.hasOwnProperty.call(message, "autoscalingConfig"))
                                     $root.google.spanner.admin.instance.v1.AutoscalingConfig.encode(message.autoscalingConfig, writer.uint32(/* id 17, wireType 2 =*/138).fork()).ldelim();
                                 if (message.replicaComputeCapacity != null && message.replicaComputeCapacity.length)
@@ -37243,6 +37449,10 @@
                                             message.labels[key] = value;
                                             break;
                                         }
+                                    case 10: {
+                                            message.instanceType = reader.int32();
+                                            break;
+                                        }
                                     case 8: {
                                             if (!(message.endpointUris && message.endpointUris.length))
                                                 message.endpointUris = [];
@@ -37257,6 +37467,10 @@
                                             message.updateTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                             break;
                                         }
+                                    case 13: {
+                                            message.freeInstanceMetadata = $root.google.spanner.admin.instance.v1.FreeInstanceMetadata.decode(reader, reader.uint32());
+                                            break;
+                                        }
                                     case 20: {
                                             message.edition = reader.int32();
                                             break;
@@ -37346,6 +37560,15 @@
                                         if (!$util.isString(message.labels[key[i]]))
                                             return "labels: string{k:string} expected";
                                 }
+                                if (message.instanceType != null && message.hasOwnProperty("instanceType"))
+                                    switch (message.instanceType) {
+                                    default:
+                                        return "instanceType: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                        break;
+                                    }
                                 if (message.endpointUris != null && message.hasOwnProperty("endpointUris")) {
                                     if (!Array.isArray(message.endpointUris))
                                         return "endpointUris: array expected";
@@ -37363,6 +37586,11 @@
                                     if (error)
                                         return "updateTime." + error;
                                 }
+                                if (message.freeInstanceMetadata != null && message.hasOwnProperty("freeInstanceMetadata")) {
+                                    var error = $root.google.spanner.admin.instance.v1.FreeInstanceMetadata.verify(message.freeInstanceMetadata);
+                                    if (error)
+                                        return "freeInstanceMetadata." + error;
+                                }
                                 if (message.edition != null && message.hasOwnProperty("edition"))
                                     switch (message.edition) {
                                     default:
@@ -37449,6 +37677,26 @@
                                     for (var keys = Object.keys(object.labels), i = 0; i < keys.length; ++i)
                                         message.labels[keys[i]] = String(object.labels[keys[i]]);
                                 }
+                                switch (object.instanceType) {
+                                default:
+                                    if (typeof object.instanceType === "number") {
+                                        message.instanceType = object.instanceType;
+                                        break;
+                                    }
+                                    break;
+                                case "INSTANCE_TYPE_UNSPECIFIED":
+                                case 0:
+                                    message.instanceType = 0;
+                                    break;
+                                case "PROVISIONED":
+                                case 1:
+                                    message.instanceType = 1;
+                                    break;
+                                case "FREE_INSTANCE":
+                                case 2:
+                                    message.instanceType = 2;
+                                    break;
+                                }
                                 if (object.endpointUris) {
                                     if (!Array.isArray(object.endpointUris))
                                         throw TypeError(".google.spanner.admin.instance.v1.Instance.endpointUris: array expected");
@@ -37466,6 +37714,11 @@
                                         throw TypeError(".google.spanner.admin.instance.v1.Instance.updateTime: object expected");
                                     message.updateTime = $root.google.protobuf.Timestamp.fromObject(object.updateTime);
                                 }
+                                if (object.freeInstanceMetadata != null) {
+                                    if (typeof object.freeInstanceMetadata !== "object")
+                                        throw TypeError(".google.spanner.admin.instance.v1.Instance.freeInstanceMetadata: object expected");
+                                    message.freeInstanceMetadata = $root.google.spanner.admin.instance.v1.FreeInstanceMetadata.fromObject(object.freeInstanceMetadata);
+                                }
                                 switch (object.edition) {
                                 default:
                                     if (typeof object.edition === "number") {
@@ -37539,8 +37792,10 @@
                                     object.nodeCount = 0;
                                     object.state = options.enums === String ? "STATE_UNSPECIFIED" : 0;
                                     object.processingUnits = 0;
+                                    object.instanceType = options.enums === String ? "INSTANCE_TYPE_UNSPECIFIED" : 0;
                                     object.createTime = null;
                                     object.updateTime = null;
+                                    object.freeInstanceMetadata = null;
                                     object.autoscalingConfig = null;
                                     object.edition = options.enums === String ? "EDITION_UNSPECIFIED" : 0;
                                     object.defaultBackupScheduleType = options.enums === String ? "DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED" : 0;
@@ -37568,10 +37823,14 @@
                                 }
                                 if (message.processingUnits != null && message.hasOwnProperty("processingUnits"))
                                     object.processingUnits = message.processingUnits;
+                                if (message.instanceType != null && message.hasOwnProperty("instanceType"))
+                                    object.instanceType = options.enums === String ? $root.google.spanner.admin.instance.v1.Instance.InstanceType[message.instanceType] === undefined ? message.instanceType : $root.google.spanner.admin.instance.v1.Instance.InstanceType[message.instanceType] : message.instanceType;
                                 if (message.createTime != null && message.hasOwnProperty("createTime"))
                                     object.createTime = $root.google.protobuf.Timestamp.toObject(message.createTime, options);
                                 if (message.updateTime != null && message.hasOwnProperty("updateTime"))
                                     object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
+                                if (message.freeInstanceMetadata != null && message.hasOwnProperty("freeInstanceMetadata"))
+                                    object.freeInstanceMetadata = $root.google.spanner.admin.instance.v1.FreeInstanceMetadata.toObject(message.freeInstanceMetadata, options);
                                 if (message.autoscalingConfig != null && message.hasOwnProperty("autoscalingConfig"))
                                     object.autoscalingConfig = $root.google.spanner.admin.instance.v1.AutoscalingConfig.toObject(message.autoscalingConfig, options);
                                 if (message.replicaComputeCapacity && message.replicaComputeCapacity.length) {
@@ -37628,6 +37887,22 @@
                                 return values;
                             })();
     
+                            /**
+                             * InstanceType enum.
+                             * @name google.spanner.admin.instance.v1.Instance.InstanceType
+                             * @enum {number}
+                             * @property {number} INSTANCE_TYPE_UNSPECIFIED=0 INSTANCE_TYPE_UNSPECIFIED value
+                             * @property {number} PROVISIONED=1 PROVISIONED value
+                             * @property {number} FREE_INSTANCE=2 FREE_INSTANCE value
+                             */
+                            Instance.InstanceType = (function() {
+                                var valuesById = {}, values = Object.create(valuesById);
+                                values[valuesById[0] = "INSTANCE_TYPE_UNSPECIFIED"] = 0;
+                                values[valuesById[1] = "PROVISIONED"] = 1;
+                                values[valuesById[2] = "FREE_INSTANCE"] = 2;
+                                return values;
+                            })();
+    
                             /**
                              * Edition enum.
                              * @name google.spanner.admin.instance.v1.Instance.Edition
@@ -41871,6 +42146,306 @@
                             return UpdateInstanceMetadata;
                         })();
     
+                        v1.FreeInstanceMetadata = (function() {
+    
+                            /**
+                             * Properties of a FreeInstanceMetadata.
+                             * @memberof google.spanner.admin.instance.v1
+                             * @interface IFreeInstanceMetadata
+                             * @property {google.protobuf.ITimestamp|null} [expireTime] FreeInstanceMetadata expireTime
+                             * @property {google.protobuf.ITimestamp|null} [upgradeTime] FreeInstanceMetadata upgradeTime
+                             * @property {google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior|null} [expireBehavior] FreeInstanceMetadata expireBehavior
+                             */
+    
+                            /**
+                             * Constructs a new FreeInstanceMetadata.
+                             * @memberof google.spanner.admin.instance.v1
+                             * @classdesc Represents a FreeInstanceMetadata.
+                             * @implements IFreeInstanceMetadata
+                             * @constructor
+                             * @param {google.spanner.admin.instance.v1.IFreeInstanceMetadata=} [properties] Properties to set
+                             */
+                            function FreeInstanceMetadata(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * FreeInstanceMetadata expireTime.
+                             * @member {google.protobuf.ITimestamp|null|undefined} expireTime
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @instance
+                             */
+                            FreeInstanceMetadata.prototype.expireTime = null;
+    
+                            /**
+                             * FreeInstanceMetadata upgradeTime.
+                             * @member {google.protobuf.ITimestamp|null|undefined} upgradeTime
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @instance
+                             */
+                            FreeInstanceMetadata.prototype.upgradeTime = null;
+    
+                            /**
+                             * FreeInstanceMetadata expireBehavior.
+                             * @member {google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior} expireBehavior
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @instance
+                             */
+                            FreeInstanceMetadata.prototype.expireBehavior = 0;
+    
+                            /**
+                             * Creates a new FreeInstanceMetadata instance using the specified properties.
+                             * @function create
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IFreeInstanceMetadata=} [properties] Properties to set
+                             * @returns {google.spanner.admin.instance.v1.FreeInstanceMetadata} FreeInstanceMetadata instance
+                             */
+                            FreeInstanceMetadata.create = function create(properties) {
+                                return new FreeInstanceMetadata(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified FreeInstanceMetadata message. Does not implicitly {@link google.spanner.admin.instance.v1.FreeInstanceMetadata.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IFreeInstanceMetadata} message FreeInstanceMetadata message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            FreeInstanceMetadata.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.expireTime != null && Object.hasOwnProperty.call(message, "expireTime"))
+                                    $root.google.protobuf.Timestamp.encode(message.expireTime, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                if (message.upgradeTime != null && Object.hasOwnProperty.call(message, "upgradeTime"))
+                                    $root.google.protobuf.Timestamp.encode(message.upgradeTime, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                                if (message.expireBehavior != null && Object.hasOwnProperty.call(message, "expireBehavior"))
+                                    writer.uint32(/* id 3, wireType 0 =*/24).int32(message.expireBehavior);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified FreeInstanceMetadata message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.FreeInstanceMetadata.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IFreeInstanceMetadata} message FreeInstanceMetadata message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            FreeInstanceMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a FreeInstanceMetadata message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.spanner.admin.instance.v1.FreeInstanceMetadata} FreeInstanceMetadata
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            FreeInstanceMetadata.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.admin.instance.v1.FreeInstanceMetadata();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.expireTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                            break;
+                                        }
+                                    case 2: {
+                                            message.upgradeTime = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                            break;
+                                        }
+                                    case 3: {
+                                            message.expireBehavior = reader.int32();
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a FreeInstanceMetadata message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.spanner.admin.instance.v1.FreeInstanceMetadata} FreeInstanceMetadata
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            FreeInstanceMetadata.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a FreeInstanceMetadata message.
+                             * @function verify
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            FreeInstanceMetadata.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.expireTime != null && message.hasOwnProperty("expireTime")) {
+                                    var error = $root.google.protobuf.Timestamp.verify(message.expireTime);
+                                    if (error)
+                                        return "expireTime." + error;
+                                }
+                                if (message.upgradeTime != null && message.hasOwnProperty("upgradeTime")) {
+                                    var error = $root.google.protobuf.Timestamp.verify(message.upgradeTime);
+                                    if (error)
+                                        return "upgradeTime." + error;
+                                }
+                                if (message.expireBehavior != null && message.hasOwnProperty("expireBehavior"))
+                                    switch (message.expireBehavior) {
+                                    default:
+                                        return "expireBehavior: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                        break;
+                                    }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a FreeInstanceMetadata message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.spanner.admin.instance.v1.FreeInstanceMetadata} FreeInstanceMetadata
+                             */
+                            FreeInstanceMetadata.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.spanner.admin.instance.v1.FreeInstanceMetadata)
+                                    return object;
+                                var message = new $root.google.spanner.admin.instance.v1.FreeInstanceMetadata();
+                                if (object.expireTime != null) {
+                                    if (typeof object.expireTime !== "object")
+                                        throw TypeError(".google.spanner.admin.instance.v1.FreeInstanceMetadata.expireTime: object expected");
+                                    message.expireTime = $root.google.protobuf.Timestamp.fromObject(object.expireTime);
+                                }
+                                if (object.upgradeTime != null) {
+                                    if (typeof object.upgradeTime !== "object")
+                                        throw TypeError(".google.spanner.admin.instance.v1.FreeInstanceMetadata.upgradeTime: object expected");
+                                    message.upgradeTime = $root.google.protobuf.Timestamp.fromObject(object.upgradeTime);
+                                }
+                                switch (object.expireBehavior) {
+                                default:
+                                    if (typeof object.expireBehavior === "number") {
+                                        message.expireBehavior = object.expireBehavior;
+                                        break;
+                                    }
+                                    break;
+                                case "EXPIRE_BEHAVIOR_UNSPECIFIED":
+                                case 0:
+                                    message.expireBehavior = 0;
+                                    break;
+                                case "FREE_TO_PROVISIONED":
+                                case 1:
+                                    message.expireBehavior = 1;
+                                    break;
+                                case "REMOVE_AFTER_GRACE_PERIOD":
+                                case 2:
+                                    message.expireBehavior = 2;
+                                    break;
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a FreeInstanceMetadata message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.FreeInstanceMetadata} message FreeInstanceMetadata
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            FreeInstanceMetadata.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults) {
+                                    object.expireTime = null;
+                                    object.upgradeTime = null;
+                                    object.expireBehavior = options.enums === String ? "EXPIRE_BEHAVIOR_UNSPECIFIED" : 0;
+                                }
+                                if (message.expireTime != null && message.hasOwnProperty("expireTime"))
+                                    object.expireTime = $root.google.protobuf.Timestamp.toObject(message.expireTime, options);
+                                if (message.upgradeTime != null && message.hasOwnProperty("upgradeTime"))
+                                    object.upgradeTime = $root.google.protobuf.Timestamp.toObject(message.upgradeTime, options);
+                                if (message.expireBehavior != null && message.hasOwnProperty("expireBehavior"))
+                                    object.expireBehavior = options.enums === String ? $root.google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior[message.expireBehavior] === undefined ? message.expireBehavior : $root.google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior[message.expireBehavior] : message.expireBehavior;
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this FreeInstanceMetadata to JSON.
+                             * @function toJSON
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            FreeInstanceMetadata.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for FreeInstanceMetadata
+                             * @function getTypeUrl
+                             * @memberof google.spanner.admin.instance.v1.FreeInstanceMetadata
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            FreeInstanceMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.spanner.admin.instance.v1.FreeInstanceMetadata";
+                            };
+    
+                            /**
+                             * ExpireBehavior enum.
+                             * @name google.spanner.admin.instance.v1.FreeInstanceMetadata.ExpireBehavior
+                             * @enum {number}
+                             * @property {number} EXPIRE_BEHAVIOR_UNSPECIFIED=0 EXPIRE_BEHAVIOR_UNSPECIFIED value
+                             * @property {number} FREE_TO_PROVISIONED=1 FREE_TO_PROVISIONED value
+                             * @property {number} REMOVE_AFTER_GRACE_PERIOD=2 REMOVE_AFTER_GRACE_PERIOD value
+                             */
+                            FreeInstanceMetadata.ExpireBehavior = (function() {
+                                var valuesById = {}, values = Object.create(valuesById);
+                                values[valuesById[0] = "EXPIRE_BEHAVIOR_UNSPECIFIED"] = 0;
+                                values[valuesById[1] = "FREE_TO_PROVISIONED"] = 1;
+                                values[valuesById[2] = "REMOVE_AFTER_GRACE_PERIOD"] = 2;
+                                return values;
+                            })();
+    
+                            return FreeInstanceMetadata;
+                        })();
+    
                         v1.CreateInstanceConfigMetadata = (function() {
     
                             /**
@@ -87382,6 +87957,7 @@
                             case 13:
                             case 14:
                             case 16:
+                            case 17:
                                 break;
                             }
                         if (message.arrayElementType != null && message.hasOwnProperty("arrayElementType")) {
@@ -87493,6 +88069,10 @@
                         case 16:
                             message.code = 16;
                             break;
+                        case "UUID":
+                        case 17:
+                            message.code = 17;
+                            break;
                         }
                         if (object.arrayElementType != null) {
                             if (typeof object.arrayElementType !== "object")
@@ -88071,6 +88651,7 @@
                  * @property {number} PROTO=13 PROTO value
                  * @property {number} ENUM=14 ENUM value
                  * @property {number} INTERVAL=16 INTERVAL value
+                 * @property {number} UUID=17 UUID value
                  */
                 v1.TypeCode = (function() {
                     var valuesById = {}, values = Object.create(valuesById);
@@ -88090,6 +88671,7 @@
                     values[valuesById[13] = "PROTO"] = 13;
                     values[valuesById[14] = "ENUM"] = 14;
                     values[valuesById[16] = "INTERVAL"] = 16;
+                    values[valuesById[17] = "UUID"] = 17;
                     return values;
                 })();
     
diff --git a/protos/protos.json b/protos/protos.json
index aa5a29c92..34d294690 100644
--- a/protos/protos.json
+++ b/protos/protos.json
@@ -4117,7 +4117,9 @@
                         "InstanceConfig": {
                           "options": {
                             "(google.api.resource).type": "spanner.googleapis.com/InstanceConfig",
-                            "(google.api.resource).pattern": "projects/{project}/instanceConfigs/{instance_config}"
+                            "(google.api.resource).pattern": "projects/{project}/instanceConfigs/{instance_config}",
+                            "(google.api.resource).plural": "instanceConfigs",
+                            "(google.api.resource).singular": "instanceConfig"
                           },
                           "fields": {
                             "name": {
@@ -4182,6 +4184,27 @@
                               "options": {
                                 "(google.api.field_behavior)": "OUTPUT_ONLY"
                               }
+                            },
+                            "freeInstanceAvailability": {
+                              "type": "FreeInstanceAvailability",
+                              "id": 12,
+                              "options": {
+                                "(google.api.field_behavior)": "OUTPUT_ONLY"
+                              }
+                            },
+                            "quorumType": {
+                              "type": "QuorumType",
+                              "id": 18,
+                              "options": {
+                                "(google.api.field_behavior)": "OUTPUT_ONLY"
+                              }
+                            },
+                            "storageLimitPerProcessingUnit": {
+                              "type": "int64",
+                              "id": 19,
+                              "options": {
+                                "(google.api.field_behavior)": "OUTPUT_ONLY"
+                              }
                             }
                           },
                           "nested": {
@@ -4198,6 +4221,23 @@
                                 "CREATING": 1,
                                 "READY": 2
                               }
+                            },
+                            "FreeInstanceAvailability": {
+                              "values": {
+                                "FREE_INSTANCE_AVAILABILITY_UNSPECIFIED": 0,
+                                "AVAILABLE": 1,
+                                "UNSUPPORTED": 2,
+                                "DISABLED": 3,
+                                "QUOTA_EXCEEDED": 4
+                              }
+                            },
+                            "QuorumType": {
+                              "values": {
+                                "QUORUM_TYPE_UNSPECIFIED": 0,
+                                "REGION": 1,
+                                "DUAL_REGION": 2,
+                                "MULTI_REGION": 3
+                              }
                             }
                           }
                         },
@@ -4349,7 +4389,9 @@
                         "Instance": {
                           "options": {
                             "(google.api.resource).type": "spanner.googleapis.com/Instance",
-                            "(google.api.resource).pattern": "projects/{project}/instances/{instance}"
+                            "(google.api.resource).pattern": "projects/{project}/instances/{instance}",
+                            "(google.api.resource).plural": "instances",
+                            "(google.api.resource).singular": "instance"
                           },
                           "fields": {
                             "name": {
@@ -4409,6 +4451,10 @@
                               "type": "string",
                               "id": 7
                             },
+                            "instanceType": {
+                              "type": "InstanceType",
+                              "id": 10
+                            },
                             "endpointUris": {
                               "rule": "repeated",
                               "type": "string",
@@ -4428,6 +4474,10 @@
                                 "(google.api.field_behavior)": "OUTPUT_ONLY"
                               }
                             },
+                            "freeInstanceMetadata": {
+                              "type": "FreeInstanceMetadata",
+                              "id": 13
+                            },
                             "edition": {
                               "type": "Edition",
                               "id": 20,
@@ -4451,6 +4501,13 @@
                                 "READY": 2
                               }
                             },
+                            "InstanceType": {
+                              "values": {
+                                "INSTANCE_TYPE_UNSPECIFIED": 0,
+                                "PROVISIONED": 1,
+                                "FREE_INSTANCE": 2
+                              }
+                            },
                             "Edition": {
                               "values": {
                                 "EDITION_UNSPECIFIED": 0,
@@ -4788,6 +4845,37 @@
                             }
                           }
                         },
+                        "FreeInstanceMetadata": {
+                          "fields": {
+                            "expireTime": {
+                              "type": "google.protobuf.Timestamp",
+                              "id": 1,
+                              "options": {
+                                "(google.api.field_behavior)": "OUTPUT_ONLY"
+                              }
+                            },
+                            "upgradeTime": {
+                              "type": "google.protobuf.Timestamp",
+                              "id": 2,
+                              "options": {
+                                "(google.api.field_behavior)": "OUTPUT_ONLY"
+                              }
+                            },
+                            "expireBehavior": {
+                              "type": "ExpireBehavior",
+                              "id": 3
+                            }
+                          },
+                          "nested": {
+                            "ExpireBehavior": {
+                              "values": {
+                                "EXPIRE_BEHAVIOR_UNSPECIFIED": 0,
+                                "FREE_TO_PROVISIONED": 1,
+                                "REMOVE_AFTER_GRACE_PERIOD": 2
+                              }
+                            }
+                          }
+                        },
                         "CreateInstanceConfigMetadata": {
                           "fields": {
                             "instanceConfig": {
@@ -4823,7 +4911,9 @@
                         "InstancePartition": {
                           "options": {
                             "(google.api.resource).type": "spanner.googleapis.com/InstancePartition",
-                            "(google.api.resource).pattern": "projects/{project}/instances/{instance}/instancePartitions/{instance_partition}"
+                            "(google.api.resource).pattern": "projects/{project}/instances/{instance}/instancePartitions/{instance_partition}",
+                            "(google.api.resource).plural": "instancePartitions",
+                            "(google.api.resource).singular": "instancePartition"
                           },
                           "oneofs": {
                             "computeCapacity": {
@@ -4898,6 +4988,7 @@
                               "type": "string",
                               "id": 11,
                               "options": {
+                                "deprecated": true,
                                 "(google.api.field_behavior)": "OUTPUT_ONLY"
                               }
                             },
@@ -9117,7 +9208,8 @@
                     "JSON": 11,
                     "PROTO": 13,
                     "ENUM": 14,
-                    "INTERVAL": 16
+                    "INTERVAL": 16,
+                    "UUID": 17
                   }
                 },
                 "TypeAnnotationCode": {
diff --git a/src/v1/database_admin_client.ts b/src/v1/database_admin_client.ts
index 4b71eb300..17ecea32b 100644
--- a/src/v1/database_admin_client.ts
+++ b/src/v1/database_admin_client.ts
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 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/src/v1/instance_admin_client.ts b/src/v1/instance_admin_client.ts
index 815a55ad4..e425a7efc 100644
--- a/src/v1/instance_admin_client.ts
+++ b/src/v1/instance_admin_client.ts
@@ -1484,7 +1484,7 @@ export class InstanceAdminClient {
 
   /**
    * Creates an instance configuration and begins preparing it to be used. The
-   * returned {@link protos.google.longrunning.Operation|long-running operation}
+   * returned long-running operation
    * can be used to track the progress of preparing the new
    * instance configuration. The instance configuration name is assigned by the
    * caller. If the named instance configuration already exists,
@@ -1511,13 +1511,13 @@ export class InstanceAdminClient {
    *   {@link protos.google.spanner.admin.instance.v1.InstanceConfig.reconciling|reconciling}
    *   field becomes false. Its state becomes `READY`.
    *
-   * The returned {@link protos.google.longrunning.Operation|long-running operation} will
+   * The returned long-running operation will
    * have a name of the format
    * `<instance_config_name>/operations/<operation_id>` and can be used to track
    * creation of the instance configuration. The
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type is
+   * metadata field type is
    * {@link protos.google.spanner.admin.instance.v1.CreateInstanceConfigMetadata|CreateInstanceConfigMetadata}.
-   * The {@link protos.google.longrunning.Operation.response|response} field type is
+   * The response field type is
    * {@link protos.google.spanner.admin.instance.v1.InstanceConfig|InstanceConfig}, if
    * successful.
    *
@@ -1536,10 +1536,10 @@ export class InstanceAdminClient {
    *   characters in length. The `custom-` prefix is required to avoid name
    *   conflicts with Google-managed configurations.
    * @param {google.spanner.admin.instance.v1.InstanceConfig} request.instanceConfig
-   *   Required. The InstanceConfig proto of the configuration to create.
-   *   instance_config.name must be
+   *   Required. The `InstanceConfig` proto of the configuration to create.
+   *   `instance_config.name` must be
    *   `<parent>/instanceConfigs/<instance_config_id>`.
-   *   instance_config.base_config must be a Google managed configuration name,
+   *   `instance_config.base_config` must be a Google-managed configuration name,
    *   e.g. <parent>/instanceConfigs/us-east1, <parent>/instanceConfigs/nam3.
    * @param {boolean} request.validateOnly
    *   An option to validate, but not actually execute, a request,
@@ -1671,7 +1671,7 @@ export class InstanceAdminClient {
   }
   /**
    * Updates an instance configuration. The returned
-   * {@link protos.google.longrunning.Operation|long-running operation} can be used to track
+   * long-running operation can be used to track
    * the progress of updating the instance. If the named instance configuration
    * does not exist, returns `NOT_FOUND`.
    *
@@ -1702,13 +1702,13 @@ export class InstanceAdminClient {
    *   {@link protos.google.spanner.admin.instance.v1.InstanceConfig.reconciling|reconciling}
    *   field becomes false.
    *
-   * The returned {@link protos.google.longrunning.Operation|long-running operation} will
+   * The returned long-running operation will
    * have a name of the format
    * `<instance_config_name>/operations/<operation_id>` and can be used to track
    * the instance configuration modification.  The
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type is
+   * metadata field type is
    * {@link protos.google.spanner.admin.instance.v1.UpdateInstanceConfigMetadata|UpdateInstanceConfigMetadata}.
-   * The {@link protos.google.longrunning.Operation.response|response} field type is
+   * The response field type is
    * {@link protos.google.spanner.admin.instance.v1.InstanceConfig|InstanceConfig}, if
    * successful.
    *
@@ -1862,7 +1862,7 @@ export class InstanceAdminClient {
   }
   /**
    * Creates an instance and begins preparing it to begin serving. The
-   * returned {@link protos.google.longrunning.Operation|long-running operation}
+   * returned long-running operation
    * can be used to track the progress of preparing the new
    * instance. The instance name is assigned by the caller. If the
    * named instance already exists, `CreateInstance` returns
@@ -1888,12 +1888,12 @@ export class InstanceAdminClient {
    *   * The instance's allocated resource levels are readable via the API.
    *   * The instance's state becomes `READY`.
    *
-   * The returned {@link protos.google.longrunning.Operation|long-running operation} will
+   * The returned long-running operation will
    * have a name of the format `<instance_name>/operations/<operation_id>` and
    * can be used to track creation of the instance.  The
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type is
+   * metadata field type is
    * {@link protos.google.spanner.admin.instance.v1.CreateInstanceMetadata|CreateInstanceMetadata}.
-   * The {@link protos.google.longrunning.Operation.response|response} field type is
+   * The response field type is
    * {@link protos.google.spanner.admin.instance.v1.Instance|Instance}, if successful.
    *
    * @param {Object} request
@@ -2035,8 +2035,7 @@ export class InstanceAdminClient {
   }
   /**
    * Updates an instance, and begins allocating or releasing resources
-   * as requested. The returned [long-running
-   * operation][google.longrunning.Operation] can be used to track the
+   * as requested. The returned long-running operation can be used to track the
    * progress of updating the instance. If the named instance does not
    * exist, returns `NOT_FOUND`.
    *
@@ -2064,12 +2063,12 @@ export class InstanceAdminClient {
    *     tables.
    *   * The instance's new resource levels are readable via the API.
    *
-   * The returned {@link protos.google.longrunning.Operation|long-running operation} will
+   * The returned long-running operation will
    * have a name of the format `<instance_name>/operations/<operation_id>` and
    * can be used to track the instance modification.  The
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type is
+   * metadata field type is
    * {@link protos.google.spanner.admin.instance.v1.UpdateInstanceMetadata|UpdateInstanceMetadata}.
-   * The {@link protos.google.longrunning.Operation.response|response} field type is
+   * The response field type is
    * {@link protos.google.spanner.admin.instance.v1.Instance|Instance}, if successful.
    *
    * Authorization requires `spanner.instances.update` permission on
@@ -2215,7 +2214,7 @@ export class InstanceAdminClient {
   }
   /**
    * Creates an instance partition and begins preparing it to be used. The
-   * returned {@link protos.google.longrunning.Operation|long-running operation}
+   * returned long-running operation
    * can be used to track the progress of preparing the new instance partition.
    * The instance partition name is assigned by the caller. If the named
    * instance partition already exists, `CreateInstancePartition` returns
@@ -2242,13 +2241,13 @@ export class InstanceAdminClient {
    *     API.
    *   * The instance partition's state becomes `READY`.
    *
-   * The returned {@link protos.google.longrunning.Operation|long-running operation} will
+   * The returned long-running operation will
    * have a name of the format
    * `<instance_partition_name>/operations/<operation_id>` and can be used to
    * track creation of the instance partition.  The
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type is
+   * metadata field type is
    * {@link protos.google.spanner.admin.instance.v1.CreateInstancePartitionMetadata|CreateInstancePartitionMetadata}.
-   * The {@link protos.google.longrunning.Operation.response|response} field type is
+   * The response field type is
    * {@link protos.google.spanner.admin.instance.v1.InstancePartition|InstancePartition}, if
    * successful.
    *
@@ -2397,8 +2396,7 @@ export class InstanceAdminClient {
   }
   /**
    * Updates an instance partition, and begins allocating or releasing resources
-   * as requested. The returned [long-running
-   * operation][google.longrunning.Operation] can be used to track the
+   * as requested. The returned long-running operation can be used to track the
    * progress of updating the instance partition. If the named instance
    * partition does not exist, returns `NOT_FOUND`.
    *
@@ -2427,13 +2425,13 @@ export class InstanceAdminClient {
    *     partition's tables.
    *   * The instance partition's new resource levels are readable via the API.
    *
-   * The returned {@link protos.google.longrunning.Operation|long-running operation} will
+   * The returned long-running operation will
    * have a name of the format
    * `<instance_partition_name>/operations/<operation_id>` and can be used to
    * track the instance partition modification. The
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type is
+   * metadata field type is
    * {@link protos.google.spanner.admin.instance.v1.UpdateInstancePartitionMetadata|UpdateInstancePartitionMetadata}.
-   * The {@link protos.google.longrunning.Operation.response|response} field type is
+   * The response field type is
    * {@link protos.google.spanner.admin.instance.v1.InstancePartition|InstancePartition}, if
    * successful.
    *
@@ -2586,7 +2584,7 @@ export class InstanceAdminClient {
   }
   /**
    * Moves an instance to the target instance configuration. You can use the
-   * returned {@link protos.google.longrunning.Operation|long-running operation} to track
+   * returned long-running operation to track
    * the progress of moving the instance.
    *
    * `MoveInstance` returns `FAILED_PRECONDITION` if the instance meets any of
@@ -2617,13 +2615,13 @@ export class InstanceAdminClient {
    *     transaction abort rate. However, moving an instance doesn't cause any
    *     downtime.
    *
-   * The returned {@link protos.google.longrunning.Operation|long-running operation} has
+   * The returned long-running operation has
    * a name of the format
    * `<instance_name>/operations/<operation_id>` and can be used to track
    * the move instance operation. The
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type is
+   * metadata field type is
    * {@link protos.google.spanner.admin.instance.v1.MoveInstanceMetadata|MoveInstanceMetadata}.
-   * The {@link protos.google.longrunning.Operation.response|response} field type is
+   * The response field type is
    * {@link protos.google.spanner.admin.instance.v1.Instance|Instance},
    * if successful.
    * Cancelling the operation sets its metadata's
@@ -2783,6 +2781,9 @@ export class InstanceAdminClient {
   /**
    * Lists the supported instance configurations for a given project.
    *
+   * Returns both Google-managed configurations and user-managed
+   * configurations.
+   *
    * @param {Object} request
    *   The request object that will be sent.
    * @param {string} request.parent
@@ -2983,12 +2984,12 @@ export class InstanceAdminClient {
     ) as AsyncIterable<protos.google.spanner.admin.instance.v1.IInstanceConfig>;
   }
   /**
-   * Lists the user-managed instance configuration [long-running
-   * operations][google.longrunning.Operation] in the given project. An instance
+   * Lists the user-managed instance configuration long-running
+   * operations in the given project. An instance
    * configuration operation has a name of the form
    * `projects/<project>/instanceConfigs/<instance_config>/operations/<operation>`.
    * The long-running operation
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type
+   * metadata field type
    * `metadata.type_url` describes the type of the metadata. Operations returned
    * include those that have completed/failed/canceled within the last 7 days,
    * and pending operations. Operations returned are ordered by
@@ -3009,8 +3010,7 @@ export class InstanceAdminClient {
    *   must be one of: `<`, `>`, `<=`, `>=`, `!=`, `=`, or `:`.
    *   Colon `:` is the contains operator. Filter rules are not case sensitive.
    *
-   *   The following fields in the {@link protos.google.longrunning.Operation|Operation}
-   *   are eligible for filtering:
+   *   The following fields in the Operation are eligible for filtering:
    *
    *     * `name` - The name of the long-running operation
    *     * `done` - False if the operation is in progress, else true.
@@ -3160,8 +3160,7 @@ export class InstanceAdminClient {
    *   must be one of: `<`, `>`, `<=`, `>=`, `!=`, `=`, or `:`.
    *   Colon `:` is the contains operator. Filter rules are not case sensitive.
    *
-   *   The following fields in the {@link protos.google.longrunning.Operation|Operation}
-   *   are eligible for filtering:
+   *   The following fields in the Operation are eligible for filtering:
    *
    *     * `name` - The name of the long-running operation
    *     * `done` - False if the operation is in progress, else true.
@@ -3255,8 +3254,7 @@ export class InstanceAdminClient {
    *   must be one of: `<`, `>`, `<=`, `>=`, `!=`, `=`, or `:`.
    *   Colon `:` is the contains operator. Filter rules are not case sensitive.
    *
-   *   The following fields in the {@link protos.google.longrunning.Operation|Operation}
-   *   are eligible for filtering:
+   *   The following fields in the Operation are eligible for filtering:
    *
    *     * `name` - The name of the long-running operation
    *     * `done` - False if the operation is in progress, else true.
@@ -3617,7 +3615,9 @@ export class InstanceAdminClient {
    *   The request object that will be sent.
    * @param {string} request.parent
    *   Required. The instance whose instance partitions should be listed. Values
-   *   are of the form `projects/<project>/instances/<instance>`.
+   *   are of the form `projects/<project>/instances/<instance>`. Use `{instance}
+   *   = '-'` to list instance partitions for all Instances in a project, e.g.,
+   *   `projects/myproject/instances/-`.
    * @param {number} request.pageSize
    *   Number of instance partitions to be returned in the response. If 0 or less,
    *   defaults to the server's maximum allowed page size.
@@ -3730,7 +3730,9 @@ export class InstanceAdminClient {
    *   The request object that will be sent.
    * @param {string} request.parent
    *   Required. The instance whose instance partitions should be listed. Values
-   *   are of the form `projects/<project>/instances/<instance>`.
+   *   are of the form `projects/<project>/instances/<instance>`. Use `{instance}
+   *   = '-'` to list instance partitions for all Instances in a project, e.g.,
+   *   `projects/myproject/instances/-`.
    * @param {number} request.pageSize
    *   Number of instance partitions to be returned in the response. If 0 or less,
    *   defaults to the server's maximum allowed page size.
@@ -3787,7 +3789,9 @@ export class InstanceAdminClient {
    *   The request object that will be sent.
    * @param {string} request.parent
    *   Required. The instance whose instance partitions should be listed. Values
-   *   are of the form `projects/<project>/instances/<instance>`.
+   *   are of the form `projects/<project>/instances/<instance>`. Use `{instance}
+   *   = '-'` to list instance partitions for all Instances in a project, e.g.,
+   *   `projects/myproject/instances/-`.
    * @param {number} request.pageSize
    *   Number of instance partitions to be returned in the response. If 0 or less,
    *   defaults to the server's maximum allowed page size.
@@ -3835,12 +3839,11 @@ export class InstanceAdminClient {
     ) as AsyncIterable<protos.google.spanner.admin.instance.v1.IInstancePartition>;
   }
   /**
-   * Lists instance partition [long-running
-   * operations][google.longrunning.Operation] in the given instance.
+   * Lists instance partition long-running operations in the given instance.
    * An instance partition operation has a name of the form
    * `projects/<project>/instances/<instance>/instancePartitions/<instance_partition>/operations/<operation>`.
    * The long-running operation
-   * {@link protos.google.longrunning.Operation.metadata|metadata} field type
+   * metadata field type
    * `metadata.type_url` describes the type of the metadata. Operations returned
    * include those that have completed/failed/canceled within the last 7 days,
    * and pending operations. Operations returned are ordered by
@@ -3865,8 +3868,7 @@ export class InstanceAdminClient {
    *   must be one of: `<`, `>`, `<=`, `>=`, `!=`, `=`, or `:`.
    *   Colon `:` is the contains operator. Filter rules are not case sensitive.
    *
-   *   The following fields in the {@link protos.google.longrunning.Operation|Operation}
-   *   are eligible for filtering:
+   *   The following fields in the Operation are eligible for filtering:
    *
    *     * `name` - The name of the long-running operation
    *     * `done` - False if the operation is in progress, else true.
@@ -3913,7 +3915,8 @@ export class InstanceAdminClient {
    *   Optional. Deadline used while retrieving metadata for instance partition
    *   operations. Instance partitions whose operation metadata cannot be
    *   retrieved within this deadline will be added to
-   *   {@link protos.ListInstancePartitionOperationsResponse.unreachable|unreachable} in
+   *   {@link protos.google.spanner.admin.instance.v1.ListInstancePartitionOperationsResponse.unreachable_instance_partitions|unreachable_instance_partitions}
+   *   in
    *   {@link protos.google.spanner.admin.instance.v1.ListInstancePartitionOperationsResponse|ListInstancePartitionOperationsResponse}.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
@@ -4022,8 +4025,7 @@ export class InstanceAdminClient {
    *   must be one of: `<`, `>`, `<=`, `>=`, `!=`, `=`, or `:`.
    *   Colon `:` is the contains operator. Filter rules are not case sensitive.
    *
-   *   The following fields in the {@link protos.google.longrunning.Operation|Operation}
-   *   are eligible for filtering:
+   *   The following fields in the Operation are eligible for filtering:
    *
    *     * `name` - The name of the long-running operation
    *     * `done` - False if the operation is in progress, else true.
@@ -4070,7 +4072,8 @@ export class InstanceAdminClient {
    *   Optional. Deadline used while retrieving metadata for instance partition
    *   operations. Instance partitions whose operation metadata cannot be
    *   retrieved within this deadline will be added to
-   *   {@link protos.ListInstancePartitionOperationsResponse.unreachable|unreachable} in
+   *   {@link protos.google.spanner.admin.instance.v1.ListInstancePartitionOperationsResponse.unreachable_instance_partitions|unreachable_instance_partitions}
+   *   in
    *   {@link protos.google.spanner.admin.instance.v1.ListInstancePartitionOperationsResponse|ListInstancePartitionOperationsResponse}.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
@@ -4124,8 +4127,7 @@ export class InstanceAdminClient {
    *   must be one of: `<`, `>`, `<=`, `>=`, `!=`, `=`, or `:`.
    *   Colon `:` is the contains operator. Filter rules are not case sensitive.
    *
-   *   The following fields in the {@link protos.google.longrunning.Operation|Operation}
-   *   are eligible for filtering:
+   *   The following fields in the Operation are eligible for filtering:
    *
    *     * `name` - The name of the long-running operation
    *     * `done` - False if the operation is in progress, else true.
@@ -4172,7 +4174,8 @@ export class InstanceAdminClient {
    *   Optional. Deadline used while retrieving metadata for instance partition
    *   operations. Instance partitions whose operation metadata cannot be
    *   retrieved within this deadline will be added to
-   *   {@link protos.ListInstancePartitionOperationsResponse.unreachable|unreachable} in
+   *   {@link protos.google.spanner.admin.instance.v1.ListInstancePartitionOperationsResponse.unreachable_instance_partitions|unreachable_instance_partitions}
+   *   in
    *   {@link protos.google.spanner.admin.instance.v1.ListInstancePartitionOperationsResponse|ListInstancePartitionOperationsResponse}.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
diff --git a/src/v1/spanner_client.ts b/src/v1/spanner_client.ts
index f74b84b0b..2d0808283 100644
--- a/src/v1/spanner_client.ts
+++ b/src/v1/spanner_client.ts
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 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/test/gapic_database_admin_v1.ts b/test/gapic_database_admin_v1.ts
index f30e64281..403a643b9 100644
--- a/test/gapic_database_admin_v1.ts
+++ b/test/gapic_database_admin_v1.ts
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 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/test/gapic_spanner_v1.ts b/test/gapic_spanner_v1.ts
index b98138a1a..9fd09edbd 100644
--- a/test/gapic_spanner_v1.ts
+++ b/test/gapic_spanner_v1.ts
@@ -1,4 +1,4 @@
-// Copyright 2024 Google LLC
+// Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.