# v1.22.4 (2026-01-09)

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

# v1.22.3 (2025-12-09)

* No change notes available for this release.

# v1.22.2 (2025-12-08)

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

# v1.22.1 (2025-12-02)

* **Dependency Update**: Updated to the latest SDK module versions
* **Dependency Update**: Upgrade to smithy-go v1.24.0. Notably this version of the library reduces the allocation footprint of the middleware system. We observe a ~10% reduction in allocations per SDK call with this change.

# v1.22.0 (2025-11-26)

* **Feature**: This release enables AWS Cost Optimization Hub to show cost optimization recommendations for NAT Gateway.

# v1.21.2 (2025-11-25)

* **Bug Fix**: Add error check for endpoint param binding during auth scheme resolution to fix panic reported in #3234

# v1.21.1 (2025-11-19.2)

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

# v1.21.0 (2025-11-19)

* **Feature**: Release ListEfficiencyMetrics API

# v1.20.12 (2025-11-12)

* **Bug Fix**: Further reduce allocation overhead when the metrics system isn't in-use.
* **Bug Fix**: Reduce allocation overhead when the client doesn't have any HTTP interceptors configured.
* **Bug Fix**: Remove blank trace spans towards the beginning of the request that added no additional information. This conveys a slight reduction in overall allocations.

# v1.20.11 (2025-11-11)

* **Bug Fix**: Return validation error if input region is not a valid host label.

# v1.20.10 (2025-11-04)

* **Dependency Update**: Updated to the latest SDK module versions
* **Dependency Update**: Upgrade to smithy-go v1.23.2 which should convey some passive reduction of overall allocations, especially when not using the metrics system.

# v1.20.9 (2025-10-30)

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

# v1.20.8 (2025-10-23)

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

# v1.20.7 (2025-10-16)

* **Dependency Update**: Bump minimum Go version to 1.23.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.20.6 (2025-09-26)

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

# v1.20.5 (2025-09-23)

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

# v1.20.4 (2025-09-10)

* No change notes available for this release.

# v1.20.3 (2025-09-08)

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

# v1.20.2 (2025-08-29)

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

# v1.20.1 (2025-08-27)

* **Dependency Update**: Update to smithy-go v1.23.0.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.20.0 (2025-08-21)

* **Feature**: Remove incorrect endpoint tests
* **Dependency Update**: Updated to the latest SDK module versions

# v1.19.1 (2025-08-20)

* **Bug Fix**: Remove unused deserialization code.

# v1.19.0 (2025-08-11)

* **Feature**: Add support for configuring per-service Options via callback on global config.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.18.0 (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

# v1.17.1 (2025-07-30)

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

# v1.17.0 (2025-07-28)

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

# v1.16.3 (2025-07-19)

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

# v1.16.2 (2025-06-17)

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

# v1.16.1 (2025-06-10)

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

# v1.16.0 (2025-06-02)

* **Feature**: Support recommendations for Aurora instance and Aurora cluster storage.

# v1.15.0 (2025-05-28)

* **Feature**: This release allows customers to modify their preferred commitment term and payment options.

# v1.14.1 (2025-04-10)

* No change notes available for this release.

# v1.14.0 (2025-04-08)

* **Feature**: This release adds resource type "MemoryDbReservedInstances" and resource type "DynamoDbReservedCapacity" to the GetRecommendation, ListRecommendations, and ListRecommendationSummaries APIs to support new MemoryDB and DynamoDB RI recommendations.

# v1.13.2 (2025-04-03)

* No change notes available for this release.

# v1.13.1 (2025-03-04.2)

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

# v1.13.0 (2025-02-27)

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

# v1.12.1 (2025-02-18)

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

# v1.12.0 (2025-02-06)

* **Feature**: This release enables AWS Cost Optimization Hub to show cost optimization recommendations for Amazon Auto Scaling Groups, including those with single and mixed instance types.

# v1.11.10 (2025-02-05)

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

# v1.11.9 (2025-02-04)

* No change notes available for this release.

# v1.11.8 (2025-01-31)

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

# v1.11.7 (2025-01-30)

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

# v1.11.6 (2025-01-24)

* **Dependency Update**: Updated to the latest SDK module versions
* **Dependency Update**: Upgrade to smithy-go v1.22.2.

# v1.11.5 (2025-01-17)

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

# v1.11.4 (2025-01-15)

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

# v1.11.3 (2025-01-09)

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

# v1.11.2 (2024-12-19)

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

# v1.11.1 (2024-12-02)

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

# v1.11.0 (2024-11-20)

* **Feature**: This release adds action type "Delete" to the GetRecommendation, ListRecommendations and ListRecommendationSummaries APIs to support new EBS and ECS recommendations with action type "Delete".

# v1.10.6 (2024-11-18)

* **Dependency Update**: Update to smithy-go v1.22.1.
* **Dependency Update**: Updated to the latest SDK module versions

# v1.10.5 (2024-11-07)

* **Bug Fix**: Adds case-insensitive handling of error message fields in service responses

# v1.10.4 (2024-11-06)

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

# v1.10.3 (2024-10-28)

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

# v1.10.2 (2024-10-08)

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

# v1.10.1 (2024-10-07)

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

# v1.10.0 (2024-10-04)

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

# v1.9.4 (2024-10-03)

* No change notes available for this release.

# v1.9.3 (2024-09-27)

* No change notes available for this release.

# v1.9.2 (2024-09-25)

* No change notes available for this release.

# v1.9.1 (2024-09-23)

* No change notes available for this release.

# v1.9.0 (2024-09-20)

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

# v1.8.4 (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.

# v1.8.3 (2024-09-04)

* No change notes available for this release.

# v1.8.2 (2024-09-03)

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

# v1.8.1 (2024-08-15)

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

# v1.8.0 (2024-08-06)

* **Feature**: This release adds savings percentage support to the ListRecommendationSummaries API.

# v1.7.3 (2024-07-10.2)

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

# v1.7.2 (2024-07-10)

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

# v1.7.1 (2024-06-28)

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

# v1.7.0 (2024-06-26)

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

# v1.6.0 (2024-06-20)

* **Feature**: This release enables AWS Cost Optimization Hub to show cost optimization recommendations for Amazon RDS MySQL and RDS PostgreSQL.

# v1.5.1 (2024-06-19)

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

# v1.5.0 (2024-06-18)

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

# v1.4.11 (2024-06-17)

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

# v1.4.10 (2024-06-07)

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

# v1.4.9 (2024-06-03)

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

# v1.4.8 (2024-05-23)

* No change notes available for this release.

# v1.4.7 (2024-05-16)

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

# v1.4.6 (2024-05-15)

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

# v1.4.5 (2024-05-08)

* **Bug Fix**: GoDoc improvement

# v1.4.4 (2024-03-29)

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

# v1.4.3 (2024-03-18)

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

# v1.4.2 (2024-03-07)

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

# v1.4.1 (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

# v1.4.0 (2024-02-22)

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

# v1.3.3 (2024-02-21)

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

# v1.3.2 (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.

# v1.3.1 (2024-02-15)

* **Bug Fix**: Correct failure to determine the error type in awsJson services that could occur when errors were modeled with a non-string `code` field.

# v1.3.0 (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

# v1.2.0 (2024-02-09)

* **Feature**: Adding includeMemberAccounts field to the response of ListEnrollmentStatuses API.

# v1.1.6 (2024-01-04)

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

# v1.1.5 (2023-12-08)

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

# v1.1.4 (2023-12-07)

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

# v1.1.3 (2023-12-06)

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

# v1.1.2 (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

# v1.1.1 (2023-11-30)

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

# v1.1.0 (2023-11-29)

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

# v1.0.2 (2023-11-28.2)

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

# v1.0.1 (2023-11-28)

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

# v1.0.0 (2023-11-27)

* **Release**: New AWS service client module
* **Feature**: This release launches Cost Optimization Hub, a new AWS Billing and Cost Management feature that helps you consolidate and prioritize cost optimization recommendations across your AWS Organizations member accounts and AWS Regions, so that you can get the most out of your AWS spend.

