Techniques for managing a parts catalog of part objects corresponding to media content items are provided. Upon receiving a request to build a new part object for a part provider management system for a new content item, one embodiment collects a plurality of contribution references corresponding to a plurality of contributions relating to the new content item. A new part object is built based on the plurality of contributions and using a part creation graph corresponding to a type of the new content item. The new part object is published to a parts catalog for the part provider management system, for consumption by one or more downstream systems.