Summary: As MongoDB moves toward more frequent releases (a.k.a. continuous delivery), we want to enable users to take advantage of our rapidly released features, without exposing applications to incompatible server changes due to automatic server upgrades. A versioned API will help accomplish that goal. Engineer: Oleg Pudeyev Cost in Eng Weeks: 2 Original | 3 To Date | 3 Est Final 2021-04-06: Setting target date to 2021-04-09 This project is complete pending passing evergreen tests. We had been waiting for a cut of 4.9 that had the necessary collStats support before we were able to unskip our test. Evergreen patch in flight. Cost in Eng Weeks: 2 Original | 3 To Date | 4 Est Final 2021-03-23: Setting target date to 2021-03-26 This work is nearly complete, pending the completion of a single ticket to use $collStats instead of the count command. Cost in Eng Weeks: 2 Original | 1 To Date | 3 Est Final 2021-03-09: Setting target date to 2021-03-26 Oleg has completed the base implementation of this project, pending review. He is currently working on several follow up tickets to refine the implementation. Since there are a number of these follow up tickets and code review is challenging with a one person team, we are setting the end date to March 26.