That is no part of the definition of a skill.
No. Quite a few feats function entirely or primarily outside of combat. "Skills are out of combat, feats are in combat" is not in the D&D rules.while feats provide bonuses to attack rolls, saving throws, etc.
Really?In the case of Elan and Roy escaping Dorukan's dungeon just ahead of the explosion, that looks more like the use of a feat than of a skill.
(From context, I'm guessing you meant the way Elan insisted they couldn't jump until the explosion was right behind them, which...looks like catastrophically bad Wisdom, which luckily we already know Elan has.)