feat(agentregistry): Add Agent Registry Agent resource

[JamesDuncanNz]

This PR introduces the google_agent_registry_agent resource to the google-beta provider. This resource enables users to manage registered Agents within the Google Cloud Agent Registry.

Key Features:

• Full CRUD support for google_agent_registry_agent.
• Support for configuring display_name and description.
• Support for the interfaces block to define connection details (destination URL and protocol bindings: HTTP_JSON, JSONRPC, GRPC).
• Support for the agent_spec block to define the agent specification (type and JSON content).

Acceptance Tests Status:

The acceptance tests have been run successfully locally against the duncanjames-agw-tf project.

=== RUN   TestAccAgentRegistryAgent_agentRegistryAgentBasicExample
=== PAUSE TestAccAgentRegistryAgent_agentRegistryAgentBasicExample
=== CONT  TestAccAgentRegistryAgent_agentRegistryAgentBasicExample
--- PASS: TestAccAgentRegistryAgent_agentRegistryAgentBasicExample (32.28s)
PASS
ok  	github.com/hashicorp/terraform-provider-google-beta/google-beta/services/agentregistry	32.477s

Release Note Template for Downstream PRs (will be copied)

See Write release notes for guidance.

agentregistry: added `google_agent_registry_agent` resource

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes for commit f3c0ffc:

Diff report

Your PR generated the following diffs in downstream repositories:

Repository	Diff Link	Changes
google provider	View Diff	2 files changed, 262 insertions(+)
google-beta provider	View Diff	13 files changed, 1589 insertions(+)
terraform-google-conversion	View Diff	1 file changed, 232 insertions(+)

Missing test report

Your PR includes resource fields which are not covered by any test.

Resource: google_agent_registry_agent (1 total tests)
Please add an acceptance test which includes these fields. The test should include the following:

resource "google_agent_registry_agent" "primary" {
  agent_spec {
    content = # value needed
  }
}

Missing service labels

The following new resources do not have corresponding service labels:

• google_agent_registry_agent

If you believe this detection to be incorrect please raise the concern with your reviewer. Googlers: This error is safe to ignore once you've completed go/fix-missing-service-labels.
An override-missing-service-label label can be added to allow merging.

Test report

Analytics

Total Tests	Passed	Skipped	Affected
6573	5882	685	6

Affected Service Packages

• All service packages are affected

Learn how VCR tests work

---

Step 1: Replaying Mode

Action taken

Found 6 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit.

Click here to see the affected tests

• TestAccAgentRegistryAgent_agentRegistryAgentBasicExample
• TestAccContainerNodePool_withHostMaintenancePolicy
• TestAccDataprocMetastoreService_dataprocMetastoreServicePrivateServiceConnectExample
• TestAccDiscoveryEngineDataStore_discoveryengineDatastoreKmsKeyNameExample
• TestAccManagedKafkaConnector_managedkafkaConnectorBasicExample
• TestAccPubsubSubscription_pubsubSubscriptionTagsExample

View the replaying VCR build log

---

Step 2: Recording Mode

Recording Mode	Replaying Rerun	Test Name
✅ Log	✅	TestAccAgentRegistryAgent_agentRegistryAgentBasicExample
❌ Error · Log	-	TestAccContainerNodePool_withHostMaintenancePolicy
❌ Error · Log	-	TestAccDataprocMetastoreService_dataprocMetastoreServicePrivateServiceConnectExample
❌ Error · Log	-	TestAccDiscoveryEngineDataStore_discoveryengineDatastoreKmsKeyNameExample
❌ Error · Log	-	TestAccManagedKafkaConnector_managedkafkaConnectorBasicExample
❌ Error · Log	-	TestAccPubsubSubscription_pubsubSubscriptionTagsExample

Caution

Issues requiring attention before PR completion

🔴 Initial Recording Failed: Some tests failed during the recording step. See the table above for details.

Please address these issues to complete your PR. If you believe these detections are incorrect or unrelated to your change, please raise the concern with your reviewer.

View the recording VCR build log or the debug logs folder for detailed results.

@JamesDuncanNz VCR tests complete for f3c0ffc!

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes for commit 5290c5a:

Diff report

Your PR generated the following diffs in downstream repositories:

Repository	Diff Link	Changes
google provider	View Diff	2 files changed, 306 insertions(+)
google-beta provider	View Diff	13 files changed, 1706 insertions(+)
terraform-google-conversion	View Diff	1 file changed, 232 insertions(+)

Missing service labels

The following new resources do not have corresponding service labels:

• google_agent_registry_agent

If you believe this detection to be incorrect please raise the concern with your reviewer. Googlers: This error is safe to ignore once you've completed go/fix-missing-service-labels.
An override-missing-service-label label can be added to allow merging.

Test report

Analytics

Total Tests	Passed	Skipped	Affected
6579	5887	685	7

Affected Service Packages

• All service packages are affected

Learn how VCR tests work

---

Step 1: Replaying Mode

Action taken

Found 7 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit.

Click here to see the affected tests

• TestAccAgentRegistryAgent_agentRegistryAgentFullExample
• TestAccContainerNodePool_withHostMaintenancePolicy
• TestAccDataprocMetastoreService_dataprocMetastoreServicePrivateServiceConnectExample
• TestAccDiscoveryEngineDataStore_discoveryengineDatastoreKmsKeyNameExample
• TestAccFolderIamPolicy_basic
• TestAccManagedKafkaConnector_managedkafkaConnectorBasicExample
• TestAccPubsubSubscription_pubsubSubscriptionTagsExample

View the replaying VCR build log