Regenerate AWS SDK for Go V2 service clients (e.g., S3)

[Prashant-IBM]

Hi AWS team,
I am trying to understand how service clients like S3 are generated in the AWS SDK for Go V2. In the V1 SDK (aws-sdk-go), we used the make gen-services command to generate service clients.

I found codegen/sdk-codegen/aws-models/s3.json similar to api-2.json
I tried cd codegen && ./gradlew clean build -Plog-tests && ./gradlew clean but couldn't succeed.

However, I couldn’t find a similar documented approach in aws-sdk-go-v2. My use case involves either:

• Regenerating the S3 service from Smithy models defined in codegen/sdk-codegen/aws-models/s3.json

Could you please clarify:
What is the official way to generate or regenerate a service client (like S3) in the SDK v2?

1. Is there a documented process or toolchain (e.g., Smithy + smithy-go plugin) that the SDK uses internally?
2. Are there any examples or scripts available in the repo or elsewhere that show how this is done?
3. Any guidance or links to internal tooling or best practices would be appreciated.
   Thanks!