June 30th, 2025

Internal changes only with this release

June 27th, 2025

New this release:

• 🐛 (client) Fix hyper 1.x connection refused errors not marked as retryable
• (client, smithy-rs#4186) Make Rpc V2 CBOR a compatible protocol for awsQuery using awsQueryCompatible trait

June 11th, 2025

Breaking Changes:

• ⚠️ (all, smithy-rs#4154) Update MSRV to 1.85.0
• 🐛⚠️ (server) Fixed SmithyRpcV2CBOR Router to properly respect case in service names, preventing routing failures for services with mixed-case service shape ID.

New this release:

• 🐛 (client, smithy-rs#4165) Fix default supported protocols incorrectly ordered in ClientProtocolLoader.

June 3rd, 2025

New this release:

• 🐛 (client, aws-sdk-rust#1272) Fix h2 GoAway errors not being retried by hyper legacy client

May 19th, 2025

New this release:

• 🎉 (client, smithy-rs#4135) Introduce a new repeatedly() function to aws-smithy-mocks sequence builder to build mock rules that behave as an
  infinite sequence.

  let rule = mock!(aws_sdk_s3::Client::get_object)
      .sequence()
      .http_status(503, None)
      .times(2)        // repeat the last output twice before moving onto the next response in the sequence
      .output(|| GetObjectOutput::builder()
          .body(ByteStream::from_static(b"success"))
          .build()
      )
      .repeatedly()    // repeat the last output forever
      .build();

• 🐛 (client, aws-sdk-rust#1291) Removing the optimize_crc32_auto feature flag from the crc-fast dependency of the aws-smithy-checksums crate since it was causing build issues for some customers.

• 🐛 (client, smithy-rs#4137) Fix bug with enum codegen

  When the first enum generated has the @sensitive trait the opaque type
  underlying the UnknownVariant inherits that sensitivity. This means that
  it does not derive Debug. Since the module is only generated once this
  causes a problem for non-sensitive enums that rely on the type deriving
  Debug so that they can also derive Debug. We manually add Debug to
  the module so it will always be there since the UnknownVariant is not
  modeled and cannot be @sensitive.

• 🐛 (client, smithy-rs#4135) fix simple rules behavior with RuleMode::MatchAny

May 15th, 2025

New this release:

• 🐛 (all, smithy-rs#4132) Smithy unions that contain members named "unknown" will now codegen correctly
• (all, smithy-rs#4105, @FalkWoldmann) Replace once_cell with std equivalents

Contributors
Thank you for your contributions! ❤

• @FalkWoldmann (smithy-rs#4105)

May 9th, 2025

Breaking Changes:

• ⚠️ (all, smithy-rs#4120) Update MSRV to 1.82.0

New this release:

• 🐛🎉 (client, smithy-rs#4074, smithy-rs#3926) Promote aws-smithy-mocks-experimental to aws-smithy-mocks. This crate is now a recommended tool for testing
  generated SDK clients. This release includes several fixes as well as a new sequence builder API that can be
  used to test more complex scenarios such as retries.

  use aws_sdk_s3::operation::get_object::GetObjectOutput;
  use aws_sdk_s3::config::retry::RetryConfig;
  use aws_smithy_types::byte_stream::ByteStream;
  use aws_smithy_mocks::{mock, mock_client, RuleMode};
  
  #[tokio::test]
  async fn test_retry_behavior() {
      // Create a rule that returns 503 twice, then succeeds
      let retry_rule = mock!(aws_sdk_s3::Client::get_object)
          .sequence()
          .http_status(503, None)
          .times(2)                                            // Return 503 HTTP status twice
          .output(|| GetObjectOutput::builder()                // Finally return a successful output
              .body(ByteStream::from_static(b"success"))
              .build())
          .build();
  
      // Create a mocked client with the rule
      let s3 = mock_client!(
          aws_sdk_s3,
          RuleMode::Sequential,
          [&retry_rule],
          |client_builder| {
              client_builder.retry_config(RetryConfig::standard().with_max_attempts(3))
          }
      );
  
      // This should succeed after two retries
      let result = s3
          .get_object()
          .bucket("test-bucket")
          .key("test-key")
          .send()
          .await
          .expect("success after retries");
  
      // Verify the response
      let data = result.body.collect().await.expect("successful read").to_vec();
      assert_eq!(data, b"success");
  
      // Verify all responses were used
      assert_eq!(retry_rule.num_calls(), 3);
  }

• 🐛 (all, smithy-rs#4117) Fix a bug where fields that were initially annotated with the required trait and later updated to use the addedDefault trait were not serialized when their values matched the default, even when the values were explicitly set. With this fix, fields with addedDefault are now always serialized.

May 2nd, 2025

Internal changes only with this release

April 23rd, 2025

Breaking Changes:

• ⚠️ (client, smithy-rs#3776) AuthSchemeId no longer implements the Copy trait. This type has primarily been used by the Smithy code generator, so this change is not expected to affect users of SDKs.

New this release:

• (all, smithy-rs#4050, @FalkWoldmann) Replace the once_cell crate with the std counterpart in Smithy runtime crates.
• (client) remove redundant span attributes and improve log output format

Contributors
Thank you for your contributions! ❤

• @FalkWoldmann (smithy-rs#4050)

March 27th, 2025

Internal changes only with this release