Independent implementation (rust+python) of the Session Manager protocol (documentation question)

Hi,

I’ve implemented an independent implementation of the Session Manager protocol in Rust with Python bindings, based on the behavior of this repository:

[https://github.com/hupe1980/aws-ssm-bridge](https://github.com/hupe1980/aws-ssm-bridge)

During development, I wasn’t able to find formal documentation for the wire protocol and relied on reading the reference implementation and validating behavior empirically.

Is there any official or recommended documentation for the Session Manager protocol beyond this repository, or any guidance regarding third-party implementations?

Thanks.