I’m not sure if there’s a repo or where it is tbh, you should ask the SRI folks!
You mean this repo? https://github.com/demand-open-source/share-accounting-ext
We are planning to migrate to a SRI extension using the share accounting extension as a model. I wasn't aware that it could be used on a proxy. That's pretty sick. 🤙
Discussion
I believe DEMAND’s work is related/intends to use the protocol, though.