The Scientific Python Ecosystem Coordination (SPEC) mechanism is used to recommend project policies, coding conventions, and standard tooling.
This project extends SPEC 0 to consider other support windows. The neuroimaging community in particular is slower moving than much of the scientific Python community, and so SPEC0+1yr is a relatively common convention for core libraries.
See https://scientific-python.org/specs/ for a list of SPECs and their statuses.