Description

This PR ensures the bidirectional Nova Sonic Bedrock client includes the Strands user-agent marker when making requests. That brings Nova Sonic traffic in line with expected SDK attribution and adds a focused unit test covering the client configuration used in start().

Related Issues

None

Documentation PR

None

Type of Change

Bug fix

Testing

Focused unit test added for Nova Sonic client startup configuration. Additionally, I ran the bidirectional example in the README.md and verified the outgoing User-Agent header includes lib/strands-agent#<version>:

DEBUG:smithy_core.aio.client:Sending request HTTPRequest(..., fields=Fields(OrderedDict({..., 'user-agent':
Field(name='User-Agent', value=['aws-sdk-python/0.5.0 md/smithy-core#0.4.0 md/awscrt#0.32.0 ua/2.1
api/Bedrock_Runtime#0.5.0 os/macos#25.3.0 md/arch#arm64 lang/python#3.14.3 md/pyimpl#CPython lib/strands-
agents#1.35.1.dev12+gd063f9946'], kind='header'), ...})))

• I ran hatch run prepare

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
  • Not needed
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
  • Not needed
• My changes generate no new warnings
• Any dependent changes have been merged and published
  • Not needed

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