# v1.56.0 (2025-08-04)

* **Feature**: Support configurable auth scheme preferences in service clients via AWS_AUTH_SCHEME_PREFERENCE in the environment, auth_scheme_preference in the config file, and through in-code settings on LoadDefaultConfig and client constructor methods.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.55.1 (2025-07-30)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.55.0 (2025-07-28)

* **Feature**: Add support for HTTP interceptors.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.54.1 (2025-07-19)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.54.0 (2025-06-18)

* **Feature**: Add IncludeInstances parameter to DescribeAutoScalingGroups API

# v1.53.3 (2025-06-17)

* **Dependency Update**: Update to smithy-go v1.22.4.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.53.2 (2025-06-10)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.53.1 (2025-06-06)

* No change notes available for this release.

# v1.53.0 (2025-05-29)

* **Feature**: Add support for "apple" CpuManufacturer in ABIS

# v1.52.4 (2025-04-17)

* **Documentation**: Doc only update for EC2 Auto Scaling.

# v1.52.3 (2025-04-10)

* No change notes available for this release.

# v1.52.2 (2025-04-03)

* No change notes available for this release.

# v1.52.1 (2025-03-04.2)

* **Bug Fix**: Add assurance test for operation order.

# v1.52.0 (2025-02-27)

* **Feature**: Track credential providers via User-Agent Feature ids
* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.13 (2025-02-18)

* **Bug Fix**: Bump go version to 1.22
* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.12 (2025-02-05)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.11 (2025-02-04)

* No change notes available for this release.

# v1.51.10 (2025-01-31)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.9 (2025-01-30)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.8 (2025-01-24)

* **Bug Fix**: Switch to generated waiters, removing the dependency on go-jmespath and fixing broken waiters that used ordering comparators.
* **Dependency Update**: Updated to the latest SDK module versions
* **Dependency Update**: Upgrade to smithy-go v1.22.2.

# v1.51.7 (2025-01-17)

* **Bug Fix**: Fix bug where credentials weren't refreshed during retry loop.

# v1.51.6 (2025-01-15)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.5 (2025-01-14)

* **Bug Fix**: Fix issue where waiters were not failing on unmatched errors as they should. This may have breaking behavioral changes for users in fringe cases. See [this announcement](https://github.com/aws/aws-sdk-go-v2/discussions/2954) for more information.

# v1.51.4 (2025-01-09)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.3 (2025-01-08)

* No change notes available for this release.

# v1.51.2 (2024-12-19)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.1 (2024-12-02)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.51.0 (2024-11-22)

* **Feature**: Now, Amazon EC2 Auto Scaling customers can enable target tracking policies to take quicker scaling decisions, enhancing their application performance and EC2 utilization. To get started, specify target tracking to monitor a metric that is available on Amazon CloudWatch at seconds-level interval.

# v1.50.0 (2024-11-20)

* **Feature**: With this release, customers can prioritize launching instances into ODCRs using targets from ASGs or Launch Templates. Customers can express their baseline instances' CPU-performance in attribute-based Instance Requirements configuration by referencing an instance family that meets their needs.

# v1.49.0 (2024-11-18)

* **Feature**: Amazon EC2 Auto Scaling now supports Amazon Application Recovery Controller (ARC) zonal shift and zonal autoshift to help you quickly recover an impaired application from failures in an Availability Zone (AZ).
* **Dependency Update**: Update to smithy-go v1.22.1.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.48.0 (2024-11-07)

* **Feature**: Auto Scaling groups now support the ability to strictly balance instances across Availability Zones by configuring the AvailabilityZoneDistribution parameter. If balanced-only is configured for a group, launches will always be attempted in the under scaled Availability Zone even if it is unhealthy.

# v1.47.1 (2024-11-06)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.47.0 (2024-10-31)

* **Feature**: Adds bake time for Auto Scaling group Instance Refresh

# v1.46.1 (2024-10-28)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.46.0 (2024-10-21)

* **Feature**: Adds support for removing the PlacementGroup setting on an Auto Scaling Group through the UpdateAutoScalingGroup API.

# v1.45.2 (2024-10-08)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.45.1 (2024-10-07)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.45.0 (2024-10-04)

* **Feature**: Add support for HTTP client metrics.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.44.4 (2024-10-03)

* No change notes available for this release.

# v1.44.3 (2024-09-27)

* No change notes available for this release.

# v1.44.2 (2024-09-25)

* No change notes available for this release.

# v1.44.1 (2024-09-23)

* No change notes available for this release.

# v1.44.0 (2024-09-20)

* **Feature**: Add tracing and metrics support to service clients.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.43.8 (2024-09-17)

* **Bug Fix**: **BREAKFIX**: Only generate AccountIDEndpointMode config for services that use it. This is a compiler break, but removes no actual functionality, as no services currently use the account ID in endpoint resolution.

# v1.43.7 (2024-09-04)

* No change notes available for this release.

# v1.43.6 (2024-09-03)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.43.5 (2024-08-22)

* **Documentation**: Amazon EC2 Auto Scaling now provides EBS health check to manage EC2 instance replacement

# v1.43.4 (2024-08-15)

* **Dependency Update**: Bump minimum Go version to 1.21.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.43.3 (2024-07-10.2)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.43.2 (2024-07-10)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.43.1 (2024-06-28)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.43.0 (2024-06-26)

* **Feature**: Support list-of-string endpoint parameter.

# v1.42.0 (2024-06-25)

* **Feature**: Doc only update for Auto Scaling's TargetTrackingMetricDataQuery

# v1.41.1 (2024-06-19)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.41.0 (2024-06-18)

* **Feature**: Track usage of various AWS SDK features in user-agent string.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.12 (2024-06-17)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.11 (2024-06-07)

* **Bug Fix**: Add clock skew correction on all service clients
* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.10 (2024-06-03)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.9 (2024-05-23)

* No change notes available for this release.

# v1.40.8 (2024-05-16)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.7 (2024-05-15)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.6 (2024-05-08)

* **Bug Fix**: GoDoc improvement

# v1.40.5 (2024-03-29)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.4 (2024-03-18)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.3 (2024-03-07)

* **Bug Fix**: Remove dependency on go-cmp.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.2 (2024-03-01)

* **Documentation**: With this release, Amazon EC2 Auto Scaling groups, EC2 Fleet, and Spot Fleet improve the default price protection behavior of attribute-based instance type selection of Spot Instances, to consistently select from a wide range of instance types.

# v1.40.1 (2024-02-23)

* **Bug Fix**: Move all common, SDK-side middleware stack ops into the service client module to prevent cross-module compatibility issues in the future.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.40.0 (2024-02-22)

* **Feature**: Add middleware stack snapshot tests.

# v1.39.2 (2024-02-21)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.39.1 (2024-02-20)

* **Bug Fix**: When sourcing values for a service's `EndpointParameters`, the lack of a configured region (i.e. `options.Region == ""`) will now translate to a `nil` value for `EndpointParameters.Region` instead of a pointer to the empty string `""`. This will result in a much more explicit error when calling an operation instead of an obscure hostname lookup failure.

# v1.39.0 (2024-02-16)

* **Feature**: Add new ClientOptions field to waiter config which allows you to extend the config for operation calls made by waiters.

# v1.38.0 (2024-02-13)

* **Feature**: Bump minimum Go version to 1.20 per our language support policy.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.37.0 (2024-01-29)

* **Feature**: EC2 Auto Scaling customers who use attribute based instance-type selection can now intuitively define their Spot instances price protection limit as a percentage of the lowest priced On-Demand instance type.

# v1.36.7 (2024-01-04)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.36.6 (2023-12-20)

* No change notes available for this release.

# v1.36.5 (2023-12-08)

* **Bug Fix**: Reinstate presence of default Retryer in functional options, but still respect max attempts set therein.

# v1.36.4 (2023-12-07)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.36.3 (2023-12-06)

* **Bug Fix**: Restore pre-refactor auth behavior where all operations could technically be performed anonymously.

# v1.36.2 (2023-12-01)

* **Bug Fix**: Correct wrapping of errors in authentication workflow.
* **Bug Fix**: Correctly recognize cache-wrapped instances of AnonymousCredentials at client construction.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.36.1 (2023-11-30)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.36.0 (2023-11-29)

* **Feature**: Expose Options() accessor on service clients.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.35.4 (2023-11-28.2)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.35.3 (2023-11-28)

* **Bug Fix**: Respect setting RetryMaxAttempts in functional options at client construction.

# v1.35.2 (2023-11-20)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.35.1 (2023-11-16)

* No change notes available for this release.

# v1.35.0 (2023-11-15)

* **Feature**: This release introduces Instance Maintenance Policy, a new EC2 Auto Scaling capability that allows customers to define whether instances are launched before or after existing instances are terminated during instance replacement operations.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.34.1 (2023-11-09)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.34.0 (2023-11-01)

* **Feature**: Adds support for configured endpoints via environment variables and the AWS shared configuration file.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.33.0 (2023-10-31)

* **Feature**: **BREAKING CHANGE**: Bump minimum go version to 1.19 per the revised [go version support policy](https://aws.amazon.com/blogs/developer/aws-sdk-for-go-aligns-with-go-release-policy-on-supported-runtimes/).
* **Dependency Update**: Updated to the latest SDK module versions

# v1.32.0 (2023-10-24)

* **Feature**: **BREAKFIX**: Correct nullability and default value representation of various input fields across a large number of services. Calling code that references one or more of the affected fields will need to update usage accordingly. See [2162](https://github.com/aws/aws-sdk-go-v2/issues/2162).

# v1.31.0 (2023-10-12)

* **Feature**: Update the NotificationMetadata field to only allow visible ascii characters. Add paginators to DescribeInstanceRefreshes, DescribeLoadBalancers, and DescribeLoadBalancerTargetGroups
* **Dependency Update**: Updated to the latest SDK module versions

# v1.30.7 (2023-10-06)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.30.6 (2023-08-21)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.30.5 (2023-08-18)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.30.4 (2023-08-17)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.30.3 (2023-08-07)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.30.2 (2023-08-03)

* **Documentation**: Documentation changes related to Amazon EC2 Auto Scaling APIs.

# v1.30.1 (2023-08-01)

* No change notes available for this release.

# v1.30.0 (2023-07-31)

* **Feature**: Adds support for smithy-modeled endpoint resolution. A new rules-based endpoint resolution will be added to the SDK which will supercede and deprecate existing endpoint resolution. Specifically, EndpointResolver will be deprecated while BaseEndpoint and EndpointResolverV2 will take its place. For more information, please see the Endpoints section in our Developer Guide.
* **Feature**: You can now configure an instance refresh to set its status to 'failed' when it detects that a specified CloudWatch alarm has gone into the ALARM state. You can also choose to roll back the instance refresh automatically when the alarm threshold is met.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.29.1 (2023-07-28)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.29.0 (2023-07-27)

* **Feature**: This release updates validation for instance types used in the AllowedInstanceTypes and ExcludedInstanceTypes parameters of the InstanceRequirements property of a MixedInstancesPolicy.

# v1.28.10 (2023-07-13)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.28.9 (2023-06-15)

* No change notes available for this release.

# v1.28.8 (2023-06-13)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.28.7 (2023-05-04)

* No change notes available for this release.

# v1.28.6 (2023-04-28)

* No change notes available for this release.

# v1.28.5 (2023-04-24)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.28.4 (2023-04-21)

* No change notes available for this release.

# v1.28.3 (2023-04-10)

* No change notes available for this release.

# v1.28.2 (2023-04-07)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.28.1 (2023-04-04)

* **Documentation**: Documentation updates for Amazon EC2 Auto Scaling

# v1.28.0 (2023-03-30)

* **Feature**: Amazon EC2 Auto Scaling now supports Elastic Load Balancing traffic sources with the AttachTrafficSources, DetachTrafficSources, and DescribeTrafficSources APIs. This release also introduces a new activity status, "WaitingForConnectionDraining", for VPC Lattice to the DescribeScalingActivities API.

# v1.27.4 (2023-03-21)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.27.3 (2023-03-10)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.27.2 (2023-02-22)

* **Bug Fix**: Prevent nil pointer dereference when retrieving error codes.

# v1.27.1 (2023-02-20)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.27.0 (2023-02-10)

* **Feature**: You can now either terminate/replace, ignore, or wait for EC2 Auto Scaling instances on standby or protected from scale in. Also, you can also roll back changes from a failed instance refresh.

# v1.26.2 (2023-02-03)

* **Dependency Update**: Updated to the latest SDK module versions
* **Dependency Update**: Upgrade smithy to 1.27.2 and correct empty query list serialization.

# v1.26.1 (2023-01-23)

* No change notes available for this release.

# v1.26.0 (2023-01-05)

* **Feature**: Add `ErrorCodeOverride` field to all error structs (aws/smithy-go#401).

# v1.25.1 (2022-12-15)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.25.0 (2022-12-08)

* **Feature**: Adds support for metric math for target tracking scaling policies, saving you the cost and effort of publishing a custom metric to CloudWatch. Also adds support for VPC Lattice by adding the Attach/Detach/DescribeTrafficSources APIs and a new health check type to the CreateAutoScalingGroup API.

# v1.24.4 (2022-12-02)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.24.3 (2022-11-22)

* No change notes available for this release.

# v1.24.2 (2022-11-16)

* No change notes available for this release.

# v1.24.1 (2022-11-10)

* **Documentation**: This release adds a new price capacity optimized allocation strategy for Spot Instances to help customers optimize provisioning of Spot Instances via EC2 Auto Scaling, EC2 Fleet, and Spot Fleet. It allocates Spot Instances based on both spare capacity availability and Spot Instance price.

# v1.24.0 (2022-11-07)

* **Feature**: This release adds support for two new attributes for attribute-based instance type selection - NetworkBandwidthGbps and AllowedInstanceTypes.

# v1.23.18 (2022-10-24)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.17 (2022-10-21)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.16 (2022-09-20)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.15 (2022-09-14)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.14 (2022-09-02)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.13 (2022-08-31)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.12 (2022-08-30)

* No change notes available for this release.

# v1.23.11 (2022-08-29)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.10 (2022-08-11)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.9 (2022-08-09)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.8 (2022-08-08)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.7 (2022-08-01)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.6 (2022-07-25)

* **Documentation**: Documentation update for Amazon EC2 Auto Scaling.

# v1.23.5 (2022-07-05)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.4 (2022-06-29)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.3 (2022-06-07)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.2 (2022-05-17)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.1 (2022-04-25)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.23.0 (2022-04-19)

* **Feature**: EC2 Auto Scaling now adds default instance warm-up times for all scaling activities, health check replacements, and other replacement events in the Auto Scaling instance lifecycle.

# v1.22.4 (2022-03-30)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.22.3 (2022-03-24)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.22.2 (2022-03-23)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.22.1 (2022-03-08.2)

* No change notes available for this release.

# v1.22.0 (2022-03-08)

* **Feature**: Updated `github.com/aws/smithy-go` to latest version
* **Dependency Update**: Updated to the latest SDK module versions

# v1.21.0 (2022-02-24.2)

* **Feature**: API client updated

# v1.20.0 (2022-02-24)

* **Feature**: API client updated
* **Feature**: Adds RetryMaxAttempts and RetryMod to API client Options. This allows the API clients' default Retryer to be configured from the shared configuration files or environment variables. Adding a new Retry mode of `Adaptive`. `Adaptive` retry mode is an experimental mode, adding client rate limiting when throttles reponses are received from an API. See [retry.AdaptiveMode](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws/retry#AdaptiveMode) for more details, and configuration options.
* **Feature**: Updated `github.com/aws/smithy-go` to latest version
* **Dependency Update**: Updated to the latest SDK module versions

# v1.19.0 (2022-01-14)

* **Feature**: Updated `github.com/aws/smithy-go` to latest version
* **Dependency Update**: Updated to the latest SDK module versions

# v1.18.0 (2022-01-07)

* **Feature**: Updated `github.com/aws/smithy-go` to latest version
* **Dependency Update**: Updated to the latest SDK module versions

# v1.17.0 (2021-12-21)

* **Feature**: API Paginators now support specifying the initial starting token, and support stopping on empty string tokens.
* **Feature**: Updated to latest service endpoints

# v1.16.1 (2021-12-02)

* **Bug Fix**: Fixes a bug that prevented aws.EndpointResolverWithOptions from being used by the service client. ([#1514](https://github.com/aws/aws-sdk-go-v2/pull/1514))
* **Dependency Update**: Updated to the latest SDK module versions

# v1.16.0 (2021-11-30)

* **Feature**: API client updated

# v1.15.1 (2021-11-19)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.15.0 (2021-11-12)

* **Feature**: Service clients now support custom endpoints that have an initial URI path defined.
* **Feature**: Waiters now have a `WaitForOutput` method, which can be used to retrieve the output of the successful wait operation. Thank you to [Andrew Haines](https://github.com/haines) for contributing this feature.

# v1.14.0 (2021-11-06)

* **Feature**: The SDK now supports configuration of FIPS and DualStack endpoints using environment variables, shared configuration, or programmatically.
* **Feature**: Updated `github.com/aws/smithy-go` to latest version
* **Feature**: Updated service to latest API model.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.13.0 (2021-10-21)

* **Feature**: API client updated
* **Feature**: Updated  to latest version
* **Dependency Update**: Updated to the latest SDK module versions

# v1.12.2 (2021-10-11)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.12.1 (2021-09-17)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.12.0 (2021-08-27)

* **Feature**: Updated `github.com/aws/smithy-go` to latest version
* **Dependency Update**: Updated to the latest SDK module versions

# v1.11.1 (2021-08-19)

* **Dependency Update**: Updated to the latest SDK module versions

# v1.11.0 (2021-08-12)

* **Feature**: API client updated

# v1.10.1 (2021-08-04)

* **Dependency Update**: Updated `github.com/aws/smithy-go` to latest version.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.10.0 (2021-07-15)

* **Feature**: The ErrorCode method on generated service error types has been corrected to match the API model.
* **Dependency Update**: Updated `github.com/aws/smithy-go` to latest version
* **Dependency Update**: Updated to the latest SDK module versions

# v1.9.0 (2021-07-01)

* **Feature**: API client updated

# v1.8.0 (2021-06-25)

* **Feature**: Updated `github.com/aws/smithy-go` to latest version
* **Dependency Update**: Updated to the latest SDK module versions

# v1.7.0 (2021-06-11)

* **Feature**: Updated to latest API model.

# v1.6.0 (2021-06-04)

* **Feature**: Updated service client to latest API model.

# v1.5.0 (2021-05-20)

* **Feature**: API client updated
* **Dependency Update**: Updated to the latest SDK module versions

# v1.4.0 (2021-05-14)

* **Feature**: Constant has been added to modules to enable runtime version inspection for reporting.
* **Dependency Update**: Updated to the latest SDK module versions

