Abstract: An online concierge system generates order batches for pickers and offers those order batches. The online concierge system generates a set of candidate order batches, which are subsets of a received set of orders. The online concierge system generates a set of order batch scores for each of a set of candidate pickers, and offers the candidate order batches to the candidate pickers for the candidate pickers to service based on the set of order batch scores. If a candidate picker accepts the offered order batch, the online concierge system identifies candidate order batches with overlapping orders with the order batch accepted by the candidate picker, and rescinds the offer for each of the candidate pickers to service the order batches.

Abstract: A dependency management system preserves and installs software project environments. The dependency management system stores snapshots of project environments on client devices which include one or more software packages. A project environment snapshot includes a dependency graph representing the dependencies of the project environment. The dependency management system may manage a project environment on a client device and update a dependency graph to reflect the dependencies of currently installed packages. As part of the updating of the dependency graph, the dependency management system may automatically resolve dependency conflicts resulting from one or more dependencies of the project environment. The dependency management system further provides project environment snapshots to client systems for installing corresponding project environments.