Our team follows a simple version of the usual "module ownership" pattern seen all over Mozilla... Each owner is responsible for the health (which is defined as uptime/code quality/decisions) made in each component owned. The ideal is we collaborate through our weekly meetings but each owner is ultimately responsible for yes/no decisions. Owners are _not_ for life and the team may elect new owners as time goes on.
This is a partial list of components which as a whole make up TaskCluster... Please contact the owners and visit the github pages for full context: