smithy-lang · landonxjames · Aug 27, 2025 · Jul 21, 2025 · Jul 21, 2025 · Jul 21, 2025
diff --git a/.changelog/1752160009.md b/.changelog/1752160009.md
diff --git a/.changelog/1755104778.md b/.changelog/1755104778.md
@@ -0,0 +1,13 @@
+---
+applies_to:
+- client
+- aws-sdk-rust
+authors:
+- ysaito1001
+references:
+- smithy-rs#4263
+breaking: false
+new_feature: false
+bug_fix: false
+---
+Make [`TokenBucket`](https://docs.rs/aws-smithy-runtime/latest/aws_smithy_runtime/client/retries/struct.TokenBucket.html) and [`ClientRateLimiter`](https://docs.rs/aws-smithy-runtime/latest/aws_smithy_runtime/client/retries/struct.ClientRateLimiter.html) configurable through [`RetryPartition`](https://docs.rs/aws-smithy-runtime/latest/aws_smithy_runtime/client/retries/struct.RetryPartition.html).
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -189,6 +189,8 @@ jobs:
           runner: smithy_ubuntu-latest_8-core
         - action: check-aws-sdk-standalone-integration-tests
           runner: ubuntu-latest
+        - action: check-aws-sdk-benchmarks
+          runner: ubuntu-latest
     steps:
     - uses: GitHubSecurityLab/actions-permissions/monitor@v1
     - uses: actions/checkout@v4

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,4 +1,95 @@
 <!-- Do not manually edit this file. Use the `changelogger` tool. -->
+August 18th, 2025
+=================
+**New this release:**
+- :tada: (client, [aws-sdk-rust#169](https://github.com/awslabs/aws-sdk-rust/issues/169)) Add support for proxy environment variables (`HTTP_PROXY, `HTTPS_PROXY`, `ALL_PROXY`, `NO_PROXY`). Service clients will now automatically respect these proxy environment variables on the latest `BehaviorVersion`. Older behavior versions do not automatically detect these environment variables and will require manually building a `aws_smithy_http_client::Connector` with a proxy config explicitly set to use this feature.
+- :tada: (client, @WillChilds-Klein) Enable rustls post-quantum by default.
+- (client) fix `aws-smithy-eventstream` feature `derive-arbitrary` on `arbitrary` >= 1.4.2
+
+**Contributors**
+Thank you for your contributions! ❤
+- @WillChilds-Klein
+
+
+August 13th, 2025
+=================
+**New this release:**
+- :bug: (client) pin crc-fast to <1.4 to workaround SIGILL
+
+
+August 11th, 2025
+=================
+**New this release:**
+- :tada: (client, [smithy-rs#4208](https://github.com/smithy-lang/smithy-rs/issues/4208)) Add the ability to insert `hints.mostly-unused = true` in Cargo.toml. Enable this hint for the below crates:
+    - aws-sdk-cloudformation
+    - aws-sdk-dynamodb
+    - aws-sdk-ec2
+    - aws-sdk-s3
+    - aws-sdk-sns
+    - aws-sdk-sqs
+    - aws-sdk-ssm
+    - aws-sdk-sts
+
+    See more information about this hint at https://blog.rust-lang.org/inside-rust/2025/07/15/call-for-testing-hint-mostly-unused/
+- :tada: (client, [smithy-rs#4208](https://github.com/smithy-lang/smithy-rs/issues/4208), @joshtriplett) Enable `hints.mostly-unused = true` for `aws-sdk-lambda` (taking a release
+    build from 57s to 40s) and `aws-sdk-rds` (taking a release build from 1m34s to
+    49s).
+
+**Contributors**
+Thank you for your contributions! ❤
+- @joshtriplett ([smithy-rs#4208](https://github.com/smithy-lang/smithy-rs/issues/4208))
+
+
+August 4th, 2025
+================
+**New this release:**
+- :tada: (all, @Dorenavant) Add EnumSection to allow decorators to modify enum member attributes
+- :bug: (client, [smithy-rs#4227](https://github.com/smithy-lang/smithy-rs/issues/4227)) Fix canonical request sort order
+
+**Contributors**
+Thank you for your contributions! ❤
+- @Dorenavant
+
+
+July 25th, 2025
+===============
+**New this release:**
+- :bug: (client, [smithy-rs#4232](https://github.com/smithy-lang/smithy-rs/issues/4232)) Add fallback equality on no auth `AuthSchemeId` for backward compatibility, treating `AuthSchemeId::from("no_auth")` (legacy) and `AuthSchemeId::from("noAuth")` (updated) as equivalent.
+
+
+July 23rd, 2025
+===============
+
+July 21st, 2025
+===============
+**New this release:**
+- :tada: (client, [smithy-rs#4203](https://github.com/smithy-lang/smithy-rs/issues/4203)) Add support for configuring auth schemes manually using an auth scheme preference list.
+    The preference list allows customers to reprioritize the order of auth schemes originally
+    determined by the auth scheme resolver.
+    Customers can configure the auth scheme preference at the following locations, listed in order of precedence:
+    1. Service Client Configuration
+    ```rust
+    use aws_runtime::auth::sigv4;
+    use aws_smithy_runtime_api::client::auth::AuthSchemeId;
+    use aws_smithy_runtime_api::client::auth::http::HTTP_BEARER_AUTH_SCHEME_ID;
+
+    let config = aws_sdk_s3::Config::builder()
+        .auth_scheme_preference([AuthSchemeId::from("scheme1"), sigv4::SCHEME_ID, HTTP_BEARER_AUTH_SCHEME_ID])
+        // ...
+        .build();
+    ```
+    2. Environment Variable
+    ```
+    AWS_AUTH_SCHEME_PREFERENCE=scheme1, sigv4, httpBearerAuth
+    ```
+    3. Configuration File
+    ```
+    auth_scheme_preference=scheme1, sigv4, httpBearerAuth
+    ```
+    With this configuration, the auth scheme resolver will prefer to select them in the specified order,
+    if they are supported.
+
+
 July 17th, 2025
 ===============
 **New this release:**

diff --git a/aws/SDK_CHANGELOG.next.json b/aws/SDK_CHANGELOG.next.json
@@ -6,84 +6,137 @@
   "smithy-rs": [],
   "aws-sdk-rust": [
     {
-      "message": "Temporarily disable fetching account ID from IMDS credentials on EC2.\n",
+      "message": "Add fallback equality on no auth `AuthSchemeId` for backward compatibility, treating `AuthSchemeId::from(\"no_auth\")` (legacy) and `AuthSchemeId::from(\"noAuth\")` (updated) as equivalent.\n",
       "meta": {
-        "bug": false,
+        "bug": true,
         "breaking": false,
         "tada": false
       },
       "author": "ysaito1001",
       "references": [
-        "smithy-rs#4187"
+        "smithy-rs#4232"
       ],
-      "since-commit": "dd10f0602682dfabafc465dbcd9eb92d3d915c51",
+      "since-commit": "a2a7d7aa371ed8d9af191f4220b6c8ddebcb2ce0",
       "age": 5
     },
     {
-      "message": "Fix hyper 1.x connection refused errors not marked as retryable\n",
+      "message": "Fix canonical request sort order\n",
       "meta": {
         "bug": true,
         "breaking": false,
         "tada": false
       },
       "author": "aajtodd",
-      "references": [],
-      "since-commit": "dd10f0602682dfabafc465dbcd9eb92d3d915c51",
-      "age": 5
+      "references": [
+        "smithy-rs#4227"
+      ],
+      "since-commit": "ca76037be5edef991257dc7d1d8425c859468d5a",
+      "age": 4
     },
     {
-      "message": "Make Rpc V2 CBOR a compatible protocol for `awsQuery` using `awsQueryCompatible` trait\n",
+      "message": "Add support for environment token provider for AWS services whose SigV4 service signing name matches `bedrock`. Setting this environment variable, `AWS_BEARER_TOKEN_BEDROCK`, allows SDKs to prefer the `httpBearerAuth` auth scheme and to retrieve a Token value from the said environment. Customers would use the environment variable as follows:\n```\n// export AWS_BEARER_TOKEN_BEDROCK=my-token\nlet sdk_config = aws_config::defaults(BehaviorVersion::latest()).load().await;\nlet bedrock_client = aws_sdk_bedrock::Client::new(&sdk_config);\n// call an operation on `bedrock_client`...\n```\nUnder the hood, this is equivalent roughly to\n```\nlet sdk_config = aws_config::defaults(BehaviorVersion::latest()).load().await;\nlet bedrock_config = aws_sdk_bedrock::config::Builder::from(sdk_config)\n    .auth_scheme_preference([HTTP_BEARER_AUTH_SCHEME_ID])\n    .token_provider(Token::new(\"my-token\", None))\n    .build();\nlet bedrock_client = aws_sdk_bedrock::Client::from_conf(bedrock_config);\n// call an operation on `bedrock_client`...\n```\nHowever, note that if customers create the service client directly from the service config builder, the environment variable will not be applied:\n```\n// export AWS_BEARER_TOKEN_BEDROCK=my-token\nlet bedrock_config = aws_sdk_bedrock::Config::builder()\n    // other configurations\n    .build();\nlet bedrock_client = aws_sdk_bedrock::Client::from_conf(bedrock_config);\n// `bedrock_client` neither prefers HTTP_BEARER_AUTH_SCHEME_ID nor sets a Token with my-token.\n```\n",
       "meta": {
         "bug": false,
         "breaking": false,
-        "tada": false
+        "tada": true
       },
       "author": "ysaito1001",
       "references": [
-        "smithy-rs#4186"
+        "smithy-rs#4241"
       ],
-      "since-commit": "dd10f0602682dfabafc465dbcd9eb92d3d915c51",
-      "age": 5
+      "since-commit": "ca76037be5edef991257dc7d1d8425c859468d5a",
+      "age": 4
     },
     {
-      "message": "Allows customers to configure the auth schemes and auth scheme resolver. For more information see the GitHub [discussion](https://github.com/smithy-lang/smithy-rs/discussions/4197).\n",
+      "message": "Add user-agent feature tracking for credential providers in `aws-config`.\n",
       "meta": {
         "bug": false,
         "breaking": false,
-        "tada": false
+        "tada": true
       },
-      "author": "ysaito1001",
+      "author": "landonxjames",
+      "references": [
+        "smithy-rs#4238"
+      ],
+      "since-commit": "ca76037be5edef991257dc7d1d8425c859468d5a",
+      "age": 4
+    },
+    {
+      "message": "Add the ability to insert `hints.mostly-unused = true` in Cargo.toml. Enable this hint for the below crates:\n- aws-sdk-cloudformation\n- aws-sdk-dynamodb\n- aws-sdk-ec2\n- aws-sdk-s3\n- aws-sdk-sns\n- aws-sdk-sqs\n- aws-sdk-ssm\n- aws-sdk-sts\n\nSee more information about this hint at https://blog.rust-lang.org/inside-rust/2025/07/15/call-for-testing-hint-mostly-unused/\n",
+      "meta": {
+        "bug": false,
+        "breaking": false,
+        "tada": true
+      },
+      "author": "landonxjames",
       "references": [
-        "smithy-rs#4076",
-        "smithy-rs#4198"
+        "smithy-rs#4208"
       ],
-      "since-commit": "ccf374dddc0690ef8aca1ed006b9e9b21299558e",
+      "since-commit": "fd54b8282920c862db4604f620ab188ec4a235b9",
       "age": 3
     },
     {
-      "message": "re-use checksums on retry attempts for enhanced durability\n",
+      "message": "Enable `hints.mostly-unused = true` for `aws-sdk-lambda` (taking a release\nbuild from 57s to 40s) and `aws-sdk-rds` (taking a release build from 1m34s to\n49s).\n",
       "meta": {
         "bug": false,
         "breaking": false,
+        "tada": true
+      },
+      "author": "joshtriplett",
+      "references": [
+        "smithy-rs#4208"
+      ],
+      "since-commit": "fd54b8282920c862db4604f620ab188ec4a235b9",
+      "age": 3
+    },
+    {
+      "message": "pin crc-fast to <1.4 to workaround SIGILL\n",
+      "meta": {
+        "bug": true,
+        "breaking": false,
         "tada": false
       },
       "author": "aajtodd",
       "references": [],
-      "since-commit": "1378695258e645d2c65a99cc0311b8c3d982e167",
+      "since-commit": "01aece8b664968ac63354e52b88915e8f8546738",
       "age": 2
     },
     {
-      "message": "Event streams now allocate a right-sized buffer avoiding repeated reallocations during serialization\n",
+      "message": "Add support for proxy environment variables (`HTTP_PROXY, `HTTPS_PROXY`, `ALL_PROXY`, `NO_PROXY`). Service clients will now automatically respect these proxy environment variables on the latest `BehaviorVersion`. Older behavior versions do not automatically detect these environment variables and will require manually building a `aws_smithy_http_client::Connector` with a proxy config explicitly set to use this feature.\n",
       "meta": {
         "bug": false,
         "breaking": false,
-        "tada": false
+        "tada": true
       },
-      "author": "rcoh",
+      "author": "aajtodd",
       "references": [
-        "smithy-rs#4212"
+        "aws-sdk-rust#169"
       ],
-      "since-commit": "a23d116a79e8920c2efa813a8f831541a9943e4f",
+      "since-commit": "520d073c2d739e95d112842be13c924097155d47",
+      "age": 1
+    },
+    {
+      "message": "Enable rustls post-quantum by default.\n",
+      "meta": {
+        "bug": false,
+        "breaking": false,
+        "tada": true
+      },
+      "author": "WillChilds-Klein",
+      "references": [],
+      "since-commit": "520d073c2d739e95d112842be13c924097155d47",
+      "age": 1
+    },
+    {
+      "message": "fix `aws-smithy-eventstream` feature `derive-arbitrary` on `arbitrary` >= 1.4.2\n",
+      "meta": {
+        "bug": false,
+        "breaking": false,
+        "tada": false
+      },
+      "author": "aajtodd",
+      "references": [],
+      "since-commit": "520d073c2d739e95d112842be13c924097155d47",
       "age": 1
     }
   ],