As part of BigQuery output (issue 765435) and pRPC API (issue 913953), the schema used for the API is being rewritten as proto and refactored. To fully support the new API fields, this will require a fair amount of work on the backend.

Ref:
https://chromium.googlesource.com/infra/luci/luci-py.git/+/master/appengine/swarming/proto/api

This umbrella bug is to track all these efforts.