In the story of the destruction of Sdom Lot seems to bargain with the angels and win a reprieve for the city of Tzo'ar. My wife was bothered by this give and take - do angels have agency? Was it their call to make?
Ramban address this point:
. והנה זכותו של לוט היה מציל בנים ובנות וחתנים, לא כאשר חשב אברהם שימית צדיק עם רשע. וברור הוא שהיו המלאכים יודעים דעת עליון בזה, כי גם צוער בתפלתו נמלטה:
Even if the text doesn't say that this was G-d's plan or that the angels stopped to consult Hashem, you have to assume they did so. Ramban then adds:
ויתכן שהיה זה לכבוד האכסניא, כי דרך מוסר לשלוחים להציל בעל ביתם וכל אשר לו, כאשר עשו שלוחי יהושע (יהושע ו כג): שהצילו גם כל משפחת בעלת ביתם
Since derech eretz demands that you can't sleep in someone's home and then blow it up the next day, implicit in G-d's command to destroy Sdom was a built-in exclusion for Lot's home. I think the ba'alei musar refer to this idea in other places as well. G-d doesn't have to spell out to leave Lot's house alone. Even if G-d explicitly said to destroy the ENTIRE city (which Avraham assumed meant tzadik im rasha), derech eretz delimits the command and allows the angels to interpret it she'lo k'peshuto. It's like a built-in override.
On a totally different note: is there a shul out there that was considering hiring a YCT musmach that will now not do so because the Moetezes of Agudah rejects the institution? Why do I have a lot of trouble believing that. So can someone explain to me what exactly was accomplished with their declaration?