Release (2026-08-21)

Module Highlights

• github.com/aws/aws-sdk-go-v2/service/backup: v1.60.4
  • Documentation: Updating CLI Docs for Backup Audit Manager List Job Summaries APIs.
• github.com/aws/aws-sdk-go-v2/service/bedrockagentcorecontrol: v1.59.0
  • Feature: Update Dataset schema to THIRDPARTYEVALUATIONV1
• github.com/aws/aws-sdk-go-v2/service/cloudwatch: v1.67.0
  • Feature: Allows customers to specify an initial warm up period to wait for metrics to arrive when creating metric or log alarms
• github.com/aws/aws-sdk-go-v2/service/devicefarm: v1.43.0
  • Feature: Added support to CreateRemoveAccessSession for selecting a server version on the mobile WebDriver endpoint.
• github.com/aws/aws-sdk-go-v2/service/kinesis: v1.47.0
  • Feature: Generate account endpoint for Kinesis Data Streams requests when the account ID is available
• github.com/aws/aws-sdk-go-v2/service/wafv2: v1.77.7
  • Documentation: DataProtectionConfig field Key Documentation Update

Release (2026-08-20)

General Highlights

• Dependency Update: Updated to the latest SDK module versions

Module Highlights

• github.com/aws/aws-sdk-go-v2: v1.43.7
  • Bug Fix: Make x-amz-checksum-* headers on presigner always show up as headers
• github.com/aws/aws-sdk-go-v2/feature/s3/manager: v1.22.44
  • Bug Fix: Fix flaky test from feature/s3/manager upload retry
• github.com/aws/aws-sdk-go-v2/service/amplify: v1.42.0
  • Feature: Increased the maximum allowed length from 255 to 4,096 characters to support longer access tokens.
• github.com/aws/aws-sdk-go-v2/service/arcregionswitch: v1.14.0
  • Feature: Adds support for Rds switchover read replica for Oracle databases in Region switch plans
• github.com/aws/aws-sdk-go-v2/service/batch: v1.70.0
  • Feature: AWS Batch now supports a new compute environment type that provides fully managed EC2 capacity with broader compute flexibility than Fargate, including GPU instances, bare metal, and specific instance type selection, without infrastructure management overhead.
• github.com/aws/aws-sdk-go-v2/service/cloudfront: v1.68.0
  • Feature: Added SigV4a as a supported signing protocol for Origin Access Control (OAC), enabling CloudFront to sign requests to Amazon S3 Multi-Region Access Point (S3-MRAP) origins.
• github.com/aws/aws-sdk-go-v2/service/directconnect: v1.45.0
  • Feature: This release adds custom route prefix pool allocations for Direct Connect. You can set IPv4 and IPv6 route prefix counts on private and transit virtual interfaces, and view pool size and unallocated counts on connections and LAGs, plus direct connect gateway attachment prefix allocation totals.
• github.com/aws/aws-sdk-go-v2/service/ec2: v1.322.0
  • Feature: EC2 marks UEFI instance metadata field as sensitive.
• github.com/aws/aws-sdk-go-v2/service/lambda: v1.102.0
  • Feature: Adds support for full JSON resource-based policies, enabling customers to create, retrieve, update, and delete function resource policies as complete JSON documents.
• github.com/aws/aws-sdk-go-v2/service/pricingplanmanager: v1.0.5
  • Documentation: Documentation update for the CreateSubscription API to correct the default value of the approval mode parameter. The default value for paid subscriptions is MANUAL, not IMMEDIATE as previously documented. The default value remains IMMEDIATE for FREE tier subscriptions.
• github.com/aws/aws-sdk-go-v2/service/s3: v1.107.3
  • Bug Fix: Expand S3 operations that check for an error inside an HTTP 200 response (wave 2/4)
  • Bug Fix: Forward the original response body's Closer in S3 200-error handling instead of wrapping it in io.NopCloser, to avoid issues with TCP connection reuse (observed on CompleteMultipartUpload).
• github.com/aws/aws-sdk-go-v2/service/sagemaker: v1.268.0
  • Feature: Added IAM Identity Center (IdC) support to CreatePartnerApp and UpdatePartnerApp APIs. Added Customer Managed Key (CMK) support to CreateMlflowApp and DescribeMlflowApp.
• github.com/aws/aws-sdk-go-v2/service/sesv2: v1.67.0
  • Feature: Amazon SES now supports per-message tracking overrides. You can use the new ConfigurationOverrides parameter in SendEmail and SendBulkEmail to enable or disable open and click tracking for individual messages without changing your account-level or configuration set settings.

Release (2026-08-19)

Module Highlights

• github.com/aws/aws-sdk-go-v2/service/accountaccess: v1.1.0
  • Feature: Adds throttling exceptions to operation outputs that were previously inconsistent with other operations.
• github.com/aws/aws-sdk-go-v2/service/batch: v1.69.0
  • Feature: AWS Batch now supports managing CloudWatch Container Insights on compute environments via CreateComputeEnvironment and UpdateComputeEnvironment.
• github.com/aws/aws-sdk-go-v2/service/bedrockagentcore: v1.40.0
  • Feature: AgentCore Memory now supports Flexible Namespaces and Non-Conversational Payloads in CreateEvent API
• github.com/aws/aws-sdk-go-v2/service/bedrockagentcorecontrol: v1.58.0
  • Feature: AgentCore Memory now supports Flexible Namespaces
• github.com/aws/aws-sdk-go-v2/service/eks: v1.92.0
  • Feature: Adds support for EKS cluster certificate authorities (CA)
• github.com/aws/aws-sdk-go-v2/service/medialive: v1.104.0
  • Feature: AWS Elemental MediaLive now supports video cropping and output positioning. Use cropRectangle and outputPositionRectangle to position the encoded video within the output frame, with the surrounding area filled with black.
• github.com/aws/aws-sdk-go-v2/service/redshift: v1.66.0
  • Feature: Amazon Redshift enhanced System Table retention that allows customers to store their system table data directly in S3 Tables in customer's account instead of Redshift Managed Storage
• github.com/aws/aws-sdk-go-v2/service/redshiftserverless: v1.39.0
  • Feature: Amazon Redshift Enhanced System Table Retention that allows customers to store their system table data directly in S3 Tables in customer's account instead of Redshift Managed Storage
• github.com/aws/aws-sdk-go-v2/service/vpclattice: v1.26.0
  • Feature: Amazon VPC Lattice now supports modification of private DNS options on Service Network VPC Associations

Release (2026-08-18)

Module Highlights

• github.com/aws/aws-sdk-go-v2/feature/s3/transfermanager: v0.3.14
  • Bug Fix: Close each file transferred during directory upload/download to avoid leaking file handles
• github.com/aws/aws-sdk-go-v2/service/batch: v1.68.7
  • Documentation: Update AWS Batch documentation with newer Fargate Supported configurations, notes, and fix broken Docker link re-directs.
• github.com/aws/aws-sdk-go-v2/service/ec2: v1.321.3
  • Documentation: Doc release for CreateImage support for instances with local snapshots in Outpost
• github.com/aws/aws-sdk-go-v2/service/entityresolution: v1.31.0
  • Feature: Added ResourceNotFoundException to DeleteSchemaMapping, DeleteMatchingWorkflow, DeleteIdMappingWorkflow, and DeleteIdNamespace. These operations now return a 404 ResourceNotFoundException (previously a 200 Success) when the target resource does not exist.
• github.com/aws/aws-sdk-go-v2/service/marketplacecatalog: v1.45.0
  • Feature: Introducing two new APIs, DescribeAssessment and ListAssessments. These APIs expose validation issues on Marketplace resources. The validation issues are exposed via a newly created resource called Assessment.
• github.com/aws/aws-sdk-go-v2/service/medialive: v1.103.0
  • Feature: AWS Elemental MediaLive now supports SCTE-35 marker passthrough without IDR frame insertion for CMAF Ingest, MediaPackage V2, and transport stream outputs.
• github.com/aws/aws-sdk-go-v2/service/outposts: v1.67.0
  • Feature: AWS Outposts now supports VPC Endpoint configuration in CreatePrivateConnectivityConfig, enabling scoped private connectivity with provisioning role creation for secure outpost installations
• github.com/aws/aws-sdk-go-v2/service/workspaces: v1.74.0
  • Feature: Amazon WorkSpaces now supports nested virtualization, allowing you to run hypervisors and virtualization-based workloads within your WorkSpaces. You can enable or disable nested virtualization when creating a WorkSpace or by modifying an existing WorkSpace's properties.

Release (2026-08-17)

Module Highlights

• github.com/aws/aws-sdk-go-v2/service/bedrockagentcorecontrol: v1.57.0
  • Feature: Adds implementations of third-party evaluators, both managed-as-a-service and as templates within custom evaluators.
• github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime: v1.58.0
  • Feature: AgenticRetrieveStream API now supports Amazon Bedrock AgentCore Memory. Use the new memoryConfiguration parameter to continue a session from short-term memory and retrieve from long-term memory.
• github.com/aws/aws-sdk-go-v2/service/connect: v1.189.0
  • Feature: This release adds new APIs to create, describe, update, delete, and list extraction definitions, enabling customers to manage lifecycle of extraction definition resources. Additionally, this release adds new event sources for Rules related to ACW and new action to Extract Information.
• github.com/aws/aws-sdk-go-v2/service/drs: v1.43.0
  • Feature: AWS Elastic Disaster Recovery (AWS DRS) now offers Recovery Plans to recover multi-server applications in the right order in one action. Define the launch sequence once, with ordered steps and wait times, and DRS runs it automatically. Validate with non-disruptive drills and monitor in real time.
• github.com/aws/aws-sdk-go-v2/service/geomaps: v1.14.0
  • Feature: Amazon Location Service now supports POI density and category filtering on dynamic maps. The GetStyleDescriptor API adds two optional parameters. PoiDensity (Off to VeryDense) controls POI volume, and PoiCategories filters by up to nine categories. Available on HERE and Grab map styles.
• github.com/aws/aws-sdk-go-v2/service/organizations: v1.54.0
  • Feature: Add new Transfer Responsibility error codes and document related CloudTrail events for accepting and terminating a Transfer Responsibility.

Release (2026-08-14)

General Highlights

• Dependency Update: Update to smithy-go v1.27.8.
• Dependency Update: Updated to the latest SDK module versions

Module Highlights

• github.com/aws/aws-sdk-go-v2/service/bedrockagentcore: v1.39.0
  • Feature: Add support for the Machine Payments Protocol (MPP) and x402 upto scheme payments protocol in Amazon Bedrock AgentCore Payments. Customers can now pay for MPP-gated resources and also pay services which requires upto scheme in x402
• github.com/aws/aws-sdk-go-v2/service/bedrockagentcorecontrol: v1.56.0
  • Feature: Adds AgentCore Payments support for CMK, Marketplace Subscriptions and QuickCreate
• github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime: v1.57.0
  • Feature: Adds CheckIngestedDocumentAcl and GetIngestedDocumentAcl APIs to Amazon Bedrock Knowledge Bases. Customers can verify user access to documents based on ingested ACLs and retrieve full ACL details including allow and deny entries, enabling validation of ACL ingestion without test retrievals.
• github.com/aws/aws-sdk-go-v2/service/glue: v1.153.0
  • Feature: Added support for associating glossary terms with iterable form items, such as table columns.
• github.com/aws/aws-sdk-go-v2/service/mwaaserverless: v1.4.0
  • Feature: Adds support for Consuming code for MWAA Serverless
• github.com/aws/aws-sdk-go-v2/service/observabilityadmin: v1.23.0
  • Feature: CloudWatch Logs centralization rules now support tag propagation. You can configure a TagPropagationConfiguration on your centralization rule to automatically sync resource tags from source to destination log groups, with configurable conflict resolution strategies.
• github.com/aws/aws-sdk-go-v2/service/redshift: v1.65.6
  • Documentation: Amazon Redshift now unlocks a locked admin user account and resets the failed-login counter when you update the admin password using the ModifyCluster API. This option is available only when account lockout security is enabled.
• github.com/aws/aws-sdk-go-v2/service/redshiftserverless: v1.38.7
  • Documentation: Amazon Redshift now unlocks a locked admin user account and resets the failed-login counter when you update the admin password using the UpdateNamespace API. This option is available only when account lockout security is enabled.
• github.com/aws/aws-sdk-go-v2/service/s3: v1.107.2
  • Bug Fix: Forward the original response body's Closer in S3 200-error handling instead of wrapping it in io.NopCloser, to avoid issues with TCP connection reuse (observed on CompleteMultipartUpload).
• github.com/aws/aws-sdk-go-v2/service/sagemaker: v1.267.0
  • Feature: Release support for g7.2xlarge, g7.4xlarge, g7.8xlarge, g7.12xlarge, g7.24xlarge, and g7.48xlarge instance types for SageMaker HyperPod

Release (2026-08-13)

Module Highlights

• github.com/aws/aws-sdk-go-v2/service/acm: v1.44.0
  • Feature: This change allows customers to update their existing email-validated certificates to use the DNS validation method.
• github.com/aws/aws-sdk-go-v2/service/autoscaling: v1.72.0
  • Feature: Amazon EC2 Auto Scaling now supports terminating multiple instances in a single TerminateInstanceInAutoScalingGroup call via the new InstanceIds parameter, returning an Activities list. LaunchInstances now returns IdempotentCallInProgressFault for duplicate client tokens.
• github.com/aws/aws-sdk-go-v2/service/cleanrooms: v1.51.0
  • Feature: This release adds support for minimum aggregation thresholds and comparison controls to the Custom analysis rule type.
• github.com/aws/aws-sdk-go-v2/service/codecommit: v1.38.0
  • Feature: Added the GetBlobDifferences API operation, which returns line-level diffs between two blob versions without requiring a local clone. Returns structured hunks with context, additions, and deletions. Supports pagination for large diffs.
• github.com/aws/aws-sdk-go-v2/service/connect: v1.188.0
  • Feature: Adds the StartAssistantContact API to start chat contacts handled by an AI agent. Adds SegmentAttributes to StartWebRTCContact, and corrects its error response to now receive AccessDeniedException (previously returned as an internal server error due to a missing error declaration).
• github.com/aws/aws-sdk-go-v2/service/securityagent: v1.11.0
  • Feature: Add support for setting a maximum task-hour budget cap on penetration tests and code reviews, and for revalidating previously reported findings via a new REVALIDATION job type.

Release (2026-08-12)

Module Highlights

• github.com/aws/aws-sdk-go-v2/service/glue: v1.152.2
  • Documentation: Documentation updates for materialized views APIs.
• github.com/aws/aws-sdk-go-v2/service/iam: v1.59.0
  • Feature: Introduced role manager, an IAM capability that automatically sets up the IAM roles your AWS services need. When you set up a supported service in the console, role manager creates a role for you or reuses an existing one from an AWS-managed template.
• github.com/aws/aws-sdk-go-v2/service/mediaconnect: v1.54.0
  • Feature: AWS MediaConnect now supports tuning the internal recovery latency between Router Inputs and Outputs to prioritize stream quality versus end-to-end latency.
• github.com/aws/aws-sdk-go-v2/service/odb: v1.16.0
  • Feature: Adds support for Oracle Exadata on Exascale Infrastructure (ExaDB-XS) resources including storage vaults and VM clusters.
• github.com/aws/aws-sdk-go-v2/service/quicksight: v1.124.0
  • Feature: Added APIs for DLP with Microsoft Purview (manage configs with label enforcement across Spaces, Chat, Knowledge Bases), Approval Workflows (CRUD for policies on asset sharing for Agents, Knowledge Bases, Spaces), and Limits Management (limit profiles for index storage and agent hours per user).
• github.com/aws/aws-sdk-go-v2/service/wellarchitected: v1.43.0
  • Feature: This change releases the Well-Architected Agent, a generative AI service that analyzes a customer's AWS environment and delivers personalized, prioritized recommendations across cost, security, performance, and resilience.

Release (2026-08-11)

Module Highlights

• github.com/aws/aws-sdk-go-v2/service/accountaccess: v1.0.0
  • Release: New AWS service client module
  • Feature: Adds SDK support for AWS IAM account access manager, a feature that enables mapping of IAM roles to the users and groups in AWS IAM Identity Center.
• github.com/aws/aws-sdk-go-v2/service/applicationdiscoveryservice: v1.39.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/appmesh: v1.39.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/bedrockagentcore: v1.38.0
  • Feature: Adding online eval arn as input for recommendation API
• github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime: v1.56.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/chime: v1.45.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/chimesdkidentity: v1.31.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/chimesdkmediapipelines: v1.30.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/chimesdkmeetings: v1.37.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/chimesdkmessaging: v1.36.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/chimesdkvoice: v1.33.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/cleanrooms: v1.50.0
  • Feature: Adds support for exporting redacted query execution logs in AWS Clean Rooms
• github.com/aws/aws-sdk-go-v2/service/cloud9: v1.37.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/clouddirectory: v1.33.6
  • Documentation: Added an end-of-support notice to Amazon Cloud Directory public CLI reference documentation.
• github.com/aws/aws-sdk-go-v2/service/codecommit: v1.37.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/codeguruprofiler: v1.33.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/codestarconnections: v1.39.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/cognitosync: v1.33.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/connect: v1.187.0
  • Feature: Seven new APIs for managing custom metrics, including create, describe, update, and delete. Using Custom Metrics, customers of Amazon Connect Customer can tailor analytics dashboards to their needs by applying custom thresholds, filters, and calculations to one or more out of the box measurements.
• github.com/aws/aws-sdk-go-v2/service/connectcases: v1.45.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/controltower: v1.32.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/datazone: v1.69.0
  • Feature: GetSubscriptionGrant now returns materialized asset scope name for mapping Lake Formation data cell filters or Redshift views to subscription grants.
• github.com/aws/aws-sdk-go-v2/service/dax: v1.33.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/dlm: v1.40.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/eks: v1.91.0
  • Feature: This feature would give customers the ability to selectively tune certain configurations of Kubernetes control plane components in an Amazon EKS cluster.
• github.com/aws/aws-sdk-go-v2/service/fms: v1.48.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/forecast: v1.45.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/forecastquery: v1.33.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/groundstation: v1.46.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/iotfleetwise: v1.35.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/kendra: v1.64.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/kendraranking: v1.20.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/kinesisanalytics: v1.34.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/kinesisanalyticsv2: v1.42.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/lexruntimev2: v1.39.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/machinelearning: v1.38.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/marketplacecommerceanalytics: v1.34.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/marketplacemetering: v1.40.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/mediastoredata: v1.33.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/memorydb: v1.37.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/mgn: v1.49.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/migrationhub: v1.35.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/migrationhubconfig: v1.35.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/notifications: v1.11.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/notificationscontacts: v1.9.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/organizations: v1.53.7
  • Documentation: Documentation update for AWS Organizations that clarifies valid input values for the HandshakePartyType parameter in the InviteAccountToOrganization. API ORGANIZATION is valid in responses only. valid input values are ACCOUNT and EMAIL
• github.com/aws/aws-sdk-go-v2/service/pinpointsmsvoice: v1.33.0
  • Feature: Enable schema-based (de)serialization for this service.
• github.com/aws/aws-sdk-go-v2/service/pinpointsmsvoicev2: v1.33.0
  • Feature: Enable sc...

Release (2026-08-10)

General Highlights

• Dependency Update: Update to smithy-go v1.27.7.
• Dependency Update: Updated to the latest SDK module versions

Module Highlights

• github.com/aws/aws-sdk-go-v2/service/connect: v1.186.0
  • Feature: Added Malay language option to use AI to automatically fill evaluation forms in Malay
• github.com/aws/aws-sdk-go-v2/service/elementalinference: v1.6.0
  • Feature: Added support for the SearchFixtures API and DataSourceConfiguration, enabling customers to map fixture event data onto clipping outputs for improved feature accuracy.
• github.com/aws/aws-sdk-go-v2/service/medialive: v1.102.0
  • Feature: Added VirtualSourceAddress to multicast output destinations for MediaLive Anywhere channels. Specifies the source IP address for outbound multicast packets when downstream networks enforce source-IP filtering.
• github.com/aws/aws-sdk-go-v2/service/sagemaker: v1.266.0
  • Feature: Added PREFIX AWARE routing strategy and PrefixAwareRoutingConfig to CreateEndpointConfig. Configure PrefixLength and ConcurrencyThreshold to route requests that share the same prompt prefix to the same instance.
• github.com/aws/aws-sdk-go-v2/service/sagemakerruntime: v1.44.0
  • Feature: Added the PrefixAwareId header to InvokeEndpoint and InvokeEndpointWithResponseStream. This optional parameter serves as a routing hint for endpoints configured with prefix-aware routing, differentiating routing decisions for requests that share the same prompt prefix.