# Document history for Amazon SDKs and Tools Reference Guide
<a name="doc-history"></a>

The following table describes important additions and updates to the *Amazon SDKs and Tools Reference Guide*. For notification about updates to this documentation, you can subscribe to the RSS feed.

| Change | Description | Date | 
| --- |--- |--- |
| [Adding new S3 Express One Zone setting](#doc-history) | Adding new S3 Express One Zone setting to disable of session authentication. | October 13, 2025 | 
| [Adding new authentication decision tree](#doc-history) | Adding new decision tree to assist in authentication decisions between options.  | September 23, 2025 | 
| [Adding new authentication scheme feature](#doc-history) | Adding new authentication scheme feature. Updates to Amazon STS Regional endpoints.  | August 18, 2025 | 
| [Adding new version of Tools for PowerShell](#doc-history) | Adding latest version of Tools for PowerShell support to all Setting reference Compatibility with Amazon SDKs tables. Added Host prefix injection feature. | June 23, 2025 | 
| [Page title updates](#doc-history) | More titles, table titles, abstracts, and SEO updates. | March 5, 2025 | 
| [Page title updates](#doc-history) | Updating content to use more descriptive titles. | February 24, 2025 | 
| [Adding Swift SDK to Settings reference](#doc-history) | Adding Swift SDK support to all Setting reference Compatibility with Amazon SDKs tables. | September 17, 2024 | 
| [SDK for Java 1.x system properties](#doc-history) | Add details about supported JVM system configuration settings by the Amazon SDK for Java 1.x. | May 30, 2024 | 
| [Settings updates](#doc-history) | Add JVM system configuration settings. | March 27, 2024 | 
| [Compatibility table updates](#doc-history) | Updates to compatibility for SDK support, updates to IAM Identity Center procedures. | February 20, 2024 | 
| [Container credential update. IMDS update.](#doc-history) | Adding support for Amazon EKS. Adding setting to disable IMDSv1 fallback. | December 29, 2023 | 
| [Request compression](#doc-history) | Adding settings for request compression feature. | December 27, 2023 | 
| [Compatibility tables](#doc-history) | Compatibility tables for SDK and tool features updated to include SDK for Kotlin, SDK for Rust, and Amazon Tools for PowerShell. | December 10, 2023 | 
| [Authentication updates](#doc-history) | Updates to supported methods of authentication for SDKs and tools. | July 1, 2023 | 
| [IAM best practices updates](#doc-history) | Updated guide to align with the IAM best practices. For more information, see [Security best practices in IAM](https://docs.amazonaws.cn//IAM/latest/UserGuide/best-practices.html). | February 27, 2023 | 
| [SSO updates](#doc-history) | Updates to SSO credentials for the new SSO token configuration. | November 19, 2022 | 
| [Settings updates](#doc-history) | Updates to support table for General configuration and for Amazon S3 Multi-Region Access Points. | November 17, 2022 | 
| [Settings updates](#doc-history) | Updates to clarity of IMDS client and IMDS credentials. Updates to Environment variables. | November 4, 2022 | 
| [Updating welcome page](#doc-history) | Announcing Amazon CodeWhisperer. | September 22, 2022 | 
| [Service name change for single sign-on](#doc-history) | Updates to reflect that Amazon SSO is now referred to as Amazon IAM Identity Center. | July 26, 2022 | 
| [Settings update](#doc-history) | Minor updates to config file details and to supported settings. | June 15, 2022 | 
| [Update](#doc-history) | Massive update of almost all parts of this guide. | February 1, 2022 | 
| [Initial release](#doc-history) | The first release of this guide is released to the public. | March 13, 2020 |