Clint_L
Hero
I don't quite follow the nuance, here. Yes, death saves are game abstractions, but so are hit points, and I presume we would all be okay with "falling to 0 hit points" as an acceptable trigger for contingency. Hit points are how we track character health when conscious, death saves how we track it when unconscious and struggling between life and death.Spells are written in a way that is easy to read ambiguously - whether "you" in the description refers to the player or the character.
I generally take the latter, which means that the spell must use an in game, in-narrative event as its trigger. Death saves are not events in the narrative, they are game abstractions, and I wouldn't rule them to be a valid trigger.