The added variation is called only if the script is called natively, that is by vyos-configd, and not as a dependency. This allows use as initial call into the dependency graph, allowing for a possible non-repeating instance of a cycle. The use of the term initial captures the idea, though it is not an initial object in any categorical sense; the obvious term linear (as in linear type/value) is less descriptive, if closer to the use.
This is suggested as a way to address T9146 within config dependencies.