- [x] API documentation: [link](https://groups.google.com/d/msgid/istio-dev/CALuuQPDVystyRgrwUm3qdtsMudS6gNTrG43EMxcY0U2ys-b%2Bmg%40mail.gmail.com?utm_medium=email&utm_source=footer) - [x] API style guide: https://github.com/istio/api/pull/343 - [ ] proto package update - [ ] API linter. - [ ] [Add proto validator into istio/api and istio/istio](https://github.com/istio/istio/issues/3110)