I work on the team that built this and many of our other ranking tech. I can answer any questions people have.
Also shameless plug: using this tech we released some artificial search sessions as an exploratory dataset. https://github.com/dfcf93/MSMARCO/tree/master/ConversationlS...
Cool project! One of the challenging use cases mentioned in the description is people taking a picture and asking the search engine, 'What is this?'. Has this been solved? (it is a very hard problem if taken beyond simple object classification)
Yes, exactly! This seems like totally overblown title. It's akin to saying Google open sourced their key search tech Kubernetes, which is an open source rendition of Borg, where all the Google workloads run on top of.