feat(hypercomputecluster): generate library

CHANGELOG.md

@@ -15,6 +15,7 @@ We are happy to announce the following GA libraries. Unless specifically noted,
 the APIs in these libraries are stable, and are ready for production use.
 
 - [Gemini Enterprise for Customer Experience API](google/cloud/ces/README.md)
+- [Cluster Director API](google/cloud/hypercomputecluster/README.md)
 - [Vector Search API](google/cloud/vectorsearch/README.md)
 - [Vision AI API](/google/cloud/visionai/README.md)
 - [Workload Manager](/google/cloud/workloadmanager/README.md)

README.md

@@ -317,6 +317,9 @@ See each library's `README.md` file for more information about:
 - [GKE Recommender API](google/cloud/gkerecommender/README.md)
   [[quickstart]](google/cloud/gkerecommender/quickstart/README.md)
   [[reference]](https://cloud.google.com/cpp/docs/reference/gkerecommender/latest)
+- [Cluster Director API](google/cloud/hypercomputecluster/README.md)
+  [[quickstart]](google/cloud/hypercomputecluster/quickstart/README.md)
+  [[reference]](https://cloud.google.com/cpp/docs/reference/hypercomputecluster/latest)
 - [Google Cloud IAM](google/cloud/iam/README.md)
   [[quickstart]](google/cloud/iam/quickstart/README.md)
   [[reference]](https://cloud.google.com/cpp/docs/reference/iam/latest)

ci/cloudbuild/builds/check-api.sh

@@ -74,6 +74,8 @@ function check_abi() {
   elif [[ "${shortlib}" == "storage_grpc" ]]; then
     # `storage_grpc` uses the same header location as `storage`
     public_headers="${prefix}/include/google/cloud/storage"
+  elif [[ "${shortlib}" =~ "hypercomputecluster" ]]; then
+    :
   elif [[ "${shortlib}" =~ "compute" ]]; then
     # Compute libs are also special as their headers are in subdirectories.
     local computelib="${library#google_cloud_cpp_compute_}"

ci/etc/expected_install_directories

@@ -801,6 +801,10 @@
 ./include/google/cloud/gkerecommender/v1
 ./include/google/cloud/gkerecommender/v1/internal
 ./include/google/cloud/gkerecommender/v1/mocks
+./include/google/cloud/hypercomputecluster
+./include/google/cloud/hypercomputecluster/v1
+./include/google/cloud/hypercomputecluster/v1/internal
+./include/google/cloud/hypercomputecluster/v1/mocks
 ./include/google/cloud/iam
 ./include/google/cloud/iam/admin
 ./include/google/cloud/iam/admin/v1
@@ -1431,6 +1435,8 @@
 ./lib64/cmake/google_cloud_cpp_gkemulticloud_mocks
 ./lib64/cmake/google_cloud_cpp_gkerecommender
 ./lib64/cmake/google_cloud_cpp_gkerecommender_mocks
+./lib64/cmake/google_cloud_cpp_hypercomputecluster
+./lib64/cmake/google_cloud_cpp_hypercomputecluster_mocks
 ./lib64/cmake/google_cloud_cpp_iam
 ./lib64/cmake/google_cloud_cpp_iam_mocks
 ./lib64/cmake/google_cloud_cpp_iap

cmake/GoogleCloudCppFeatures.cmake

@@ -114,6 +114,7 @@ set(GOOGLE_CLOUD_CPP_GA_LIBRARIES
     "gkehub"
     "gkemulticloud"
     "gkerecommender"
+    "hypercomputecluster"
     "iam"
     "iap"
     "ids"

external/googleapis/protodeps/hypercomputecluster.deps

@@ -0,0 +1,9 @@
+@googleapis//google/api:annotations_proto
+@googleapis//google/api:client_proto
+@googleapis//google/api:field_behavior_proto
+@googleapis//google/api:field_info_proto
+@googleapis//google/api:http_proto
+@googleapis//google/api:launch_stage_proto
+@googleapis//google/api:resource_proto
+@googleapis//google/longrunning:operations_proto
+@googleapis//google/rpc:status_proto

external/googleapis/protolists/hypercomputecluster.list

@@ -0,0 +1,2 @@
+@googleapis//google/cloud/hypercomputecluster/v1:hypercompute_cluster.proto
+@googleapis//google/cloud/hypercomputecluster/v1:operation_metadata.proto

external/googleapis/update_libraries.sh

@@ -178,6 +178,7 @@ declare -A -r LIBRARIES=(
   )"
   ["gkemulticloud"]="@googleapis//google/cloud/gkemulticloud/v1:gkemulticloud_cc_grpc"
   ["grafeas"]="@googleapis//grafeas/v1:grafeas_cc_grpc"
+  ["hypercomputecluster"]="@googleapis//google/cloud/hypercomputecluster/v1:hypercomputecluster_cc_grpc"
   ["iam"]="@googleapis//google/iam/admin/v1:admin_cc_grpc"
   ["iam_v2"]="@googleapis//google/iam/v2:iam_cc_grpc"
   ["iam_v3"]="@googleapis//google/iam/v3:iam_cc_grpc"

generator/generator_config.textproto

@@ -2664,6 +2664,14 @@ service {
   retryable_status_codes: ["kUnavailable"]
 }
 
+# Hypercompute Cluster
+service {
+  service_proto_path: "google/cloud/hypercomputecluster/v1/hypercompute_cluster.proto"
+  product_path: "google/cloud/hypercomputecluster/v1"
+  initial_copyright_year: "2026"
+  retryable_status_codes: ["kUnavailable"]
+}
+
 # IAM
 service {
   service_proto_path: "google/iam/credentials/v1/iamcredentials.proto"

google/cloud/hypercomputecluster/BUILD.bazel

@@ -0,0 +1,31 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("//bazel:gapic.bzl", "cc_gapic_library")
+
+package(default_visibility = ["//visibility:private"])
+
+licenses(["notice"])  # Apache 2.0
+
+service_dirs = ["v1/"]
+
+googleapis_deps = [
+    "@googleapis//google/cloud/hypercomputecluster/v1:hypercomputecluster_cc_grpc",
+]
+
+cc_gapic_library(
+    name = "hypercomputecluster",
+    googleapis_deps = googleapis_deps,
+    service_dirs = service_dirs,
+)

google/cloud/hypercomputecluster/CMakeLists.txt

@@ -0,0 +1,37 @@
+# ~~~
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ~~~
+
+include(GoogleCloudCppLibrary)
+
+google_cloud_cpp_add_gapic_library(hypercomputecluster "Cluster Director API"
+                                   SERVICE_DIRS "v1/")
+
+if (BUILD_TESTING AND GOOGLE_CLOUD_CPP_ENABLE_CXX_EXCEPTIONS)
+    add_executable(hypercomputecluster_quickstart "quickstart/quickstart.cc")
+    target_link_libraries(hypercomputecluster_quickstart
+                          PRIVATE google-cloud-cpp::hypercomputecluster)
+    google_cloud_cpp_add_common_options(hypercomputecluster_quickstart)
+    add_test(
+        NAME hypercomputecluster_quickstart
+        COMMAND
+            cmake -P "${PROJECT_SOURCE_DIR}/cmake/quickstart-runner.cmake"
+            $<TARGET_FILE:hypercomputecluster_quickstart> GOOGLE_CLOUD_PROJECT
+            GOOGLE_CLOUD_CPP_TEST_REGION)
+    set_tests_properties(
+        hypercomputecluster_quickstart
+        PROPERTIES LABELS "integration-test;quickstart" PASS_REGULAR_EXPRESSION
+                   "Permanent error.*gcloud-cpp.retry.function=ListClusters")
+endif ()

google/cloud/hypercomputecluster/README.md

@@ -0,0 +1,62 @@
+# Cluster Director API C++ Client Library
+
+This directory contains an idiomatic C++ client library for the
+[Cluster Director API][cloud-service-docs].
+
+The Cluster Director API allows you to deploy, manage, and monitor clusters that
+run AI, ML, or HPC workloads.
+
+While this library is **GA**, please note that the Google Cloud C++ client
+libraries do **not** follow [Semantic Versioning](https://semver.org/).
+
+## Quickstart
+
+The [quickstart/](quickstart/README.md) directory contains a minimal environment
+to get started using this client library in a larger project. The following
+"Hello World" program is used in this quickstart, and should give you a taste of
+this library.
+
+<!-- inject-quickstart-start -->
+
+```cc
+#include "google/cloud/hypercomputecluster/v1/hypercompute_cluster_client.h"
+#include "google/cloud/location.h"
+#include <iostream>
+
+int main(int argc, char* argv[]) try {
+  if (argc != 3) {
+    std::cerr << "Usage: " << argv[0] << " project-id location-id\n";
+    return 1;
+  }
+
+  auto const location = google::cloud::Location(argv[1], argv[2]);
+
+  namespace hypercomputecluster = ::google::cloud::hypercomputecluster_v1;
+  auto client = hypercomputecluster::HypercomputeClusterClient(
+      hypercomputecluster::MakeHypercomputeClusterConnection());
+
+  for (auto r : client.ListClusters(location.FullName())) {
+    if (!r) throw std::move(r).status();
+    std::cout << r->DebugString() << "\n";
+  }
+
+  return 0;
+} catch (google::cloud::Status const& status) {
+  std::cerr << "google::cloud::Status thrown: " << status << "\n";
+  return 1;
+}
+```
+
+<!-- inject-quickstart-end -->
+
+## More Information
+
+- Official documentation about the [Cluster Director API][cloud-service-docs]
+  service
+- [Reference doxygen documentation][doxygen-link] for each release of this
+  client library
+- Detailed header comments in our [public `.h`][source-link] files
+
+[cloud-service-docs]: https://cloud.google.com/cluster-director/docs
+[doxygen-link]: https://cloud.google.com/cpp/docs/reference/hypercomputecluster/latest/
+[source-link]: https://github.com/googleapis/google-cloud-cpp/tree/main/google/cloud/hypercomputecluster

google/cloud/hypercomputecluster/doc/environment-variables.dox

@@ -0,0 +1,49 @@
+/*!
+@page hypercomputecluster-env Environment Variables
+
+A number of environment variables can be used to configure the behavior of
+the library. There are also functions to configure this behavior in code. The
+environment variables are convenient when troubleshooting problems.
+
+@section hypercomputecluster-env-endpoint Endpoint Overrides
+
+<!-- inject-endpoint-env-vars-start -->
+
+- `GOOGLE_CLOUD_CPP_HYPERCOMPUTE_CLUSTER_ENDPOINT=...` overrides the
+  `EndpointOption` (which defaults to "hypercomputecluster.googleapis.com")
+  used by `MakeHypercomputeClusterConnection()`.
+
+<!-- inject-endpoint-env-vars-end -->
+
+@see google::cloud::EndpointOption
+
+@section hypercomputecluster-env-logging Logging
+
+`GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`: turns on tracing for most gRPC
+calls. The library injects an additional Stub decorator that prints each gRPC
+request and response.  Unless you have configured your own logging backend,
+you should also set `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to produce any output on
+the program's console.
+
+@see google::cloud::LoggingComponentsOption
+
+`GOOGLE_CLOUD_CPP_TRACING_OPTIONS=...`: modifies the behavior of gRPC tracing,
+including whether messages will be output on multiple lines, or whether
+string/bytes fields will be truncated.
+
+@see google::cloud::GrpcTracingOptionsOption
+
+`GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes`: turns on logging in the library, basically
+the library always "logs" but the logging infrastructure has no backend to
+actually print anything until the application sets a backend or they set this
+environment variable.
+
+@see google::cloud::LogBackend
+@see google::cloud::LogSink
+
+@section hypercomputecluster-env-project Setting the Default Project
+
+`GOOGLE_CLOUD_PROJECT=...`: is used in examples and integration tests to
+configure the GCP project. This has no effect in the library.
+
+*/

google/cloud/hypercomputecluster/doc/main.dox

@@ -0,0 +1,49 @@
+/*!
+
+@mainpage Cluster Director API C++ Client Library
+
+An idiomatic C++ client library for the [Cluster Director API][cloud-service-docs].
+
+The Cluster Director API allows you to deploy, manage, and monitor clusters
+that run AI, ML, or HPC workloads.
+
+While this library is **GA**, please note that the Google Cloud C++ client libraries do **not** follow
+[Semantic Versioning](https://semver.org/).
+
+@tableofcontents{HTML:2}
+
+## Quickstart
+
+The following shows the code that you'll run in the
+`google/cloud/hypercomputecluster/quickstart/` directory,
+which should give you a taste of the Cluster Director API C++ client library API.
+
+@snippet quickstart.cc all
+
+## Main classes
+
+<!-- inject-client-list-start -->
+The main class in this library is
+[`hypercomputecluster_v1::HypercomputeClusterClient`](@ref google::cloud::hypercomputecluster_v1::HypercomputeClusterClient). All RPCs are exposed
+as member functions of this class. Other classes provide helpers, configuration
+parameters, and infrastructure to mock
+[`hypercomputecluster_v1::HypercomputeClusterClient`](@ref google::cloud::hypercomputecluster_v1::HypercomputeClusterClient) when testing your
+application.
+<!-- inject-client-list-end -->
+
+## More Information
+
+- @ref common-error-handling - describes how the library reports errors.
+- @ref hypercomputecluster-override-endpoint - describes how to override the default
+  endpoint.
+- @ref hypercomputecluster-override-authentication - describes how to change the
+  authentication credentials used by the library.
+- @ref hypercomputecluster-override-retry - describes how to change the default retry
+  policies.
+- @ref hypercomputecluster-env - describes environment variables that can configure the
+  behavior of the library.
+- @ref hypercomputecluster-override-universe-domain - describes how to override the default universe domain.
+
+[cloud-service-docs]: https://cloud.google.com/cluster-director/docs
+
+*/

google/cloud/hypercomputecluster/doc/options.dox

@@ -0,0 +1,10 @@
+/*!
+@defgroup google-cloud-hypercomputecluster-options Cluster Director API Configuration Options
+
+This library uses the same mechanism (`google::cloud::Options`) and the common
+[options](@ref options) as all other C++ client libraries for its configuration.
+Some `*Option` classes, which are only used in this library, are documented in
+this page.
+
+@see @ref options - for an overview of client library configuration.
+*/

google/cloud/hypercomputecluster/doc/override-authentication.dox

@@ -0,0 +1,35 @@
+/*!
+@page hypercomputecluster-override-authentication How to Override the Authentication Credentials
+
+Unless otherwise configured, the client libraries use
+[Application Default Credentials] to authenticate with Google Cloud Services.
+While this works for most applications, in some cases you may need to override
+this default. You can do so by providing the
+[UnifiedCredentialsOption](@ref google::cloud::UnifiedCredentialsOption)
+The following example shows how to explicitly load a service account key file:
+
+<!-- inject-service-account-snippet-start -->
+@snippet hypercompute_cluster_client_samples.cc with-service-account
+
+<!-- inject-service-account-snippet-end -->
+
+Keep in mind that we chose this as an example because it is relatively easy to
+understand. Consult the [Best practices for managing service account keys]
+guide for more details.
+
+@see @ref guac - for more information on the factory functions to create
+`google::cloud::Credentials` objects.
+
+[Best practices for managing service account keys]: https://cloud.google.com/iam/docs/best-practices-for-managing-service-account-keys
+[Application Default Credentials]: https://cloud.google.com/docs/authentication#adc
+
+*/
+
+// <!-- inject-authentication-pages-start -->
+
+/*! @page hypercomputecluster_v1::HypercomputeClusterClient-service-account-snippet Override hypercomputecluster_v1::HypercomputeClusterClient Authentication Defaults
+
+@snippet google/cloud/hypercomputecluster/v1/samples/hypercompute_cluster_client_samples.cc with-service-account
+
+*/
+// <!-- inject-authentication-pages-end -->

google/cloud/hypercomputecluster/doc/override-endpoint.dox

@@ -0,0 +1,25 @@
+/*!
+@page hypercomputecluster-override-endpoint How to Override the Default Endpoint
+
+In some cases, you may need to override the default endpoint used by the client
+library. Use the
+[EndpointOption](@ref google::cloud::EndpointOption) when initializing the
+client library to change this default.
+
+<!-- inject-endpoint-snippet-start -->
+For example, this will override the default endpoint for `hypercomputecluster_v1::HypercomputeClusterClient`:
+
+@snippet hypercompute_cluster_client_samples.cc set-client-endpoint
+
+<!-- inject-endpoint-snippet-end -->
+
+*/
+
+// <!-- inject-endpoint-pages-start -->
+
+/*! @page hypercomputecluster_v1::HypercomputeClusterClient-endpoint-snippet Override hypercomputecluster_v1::HypercomputeClusterClient Endpoint Configuration
+
+@snippet google/cloud/hypercomputecluster/v1/samples/hypercompute_cluster_client_samples.cc set-client-endpoint
+
+*/
+// <!-- inject-endpoint-pages-end -->