this is a sharp read, and yeah, endpointing was exactly the stage that bit us. one wrong pause gets inherited by every stage after it, so we stopped chasing a single global silence threshold and started tuning it per use case. time to first audio is the number we watch most too, a short acknowledgement or filler token buys a surprising amount of grace before the caller starts talking again. barge-in is the part we'd underline twice. it demos fine and then real callers talk over the agent constantly, so a lot of the work was cancelling in-flight audio cleanly and telling a real interruption apart from a back-channel "mhm". thanks for the comment, this is the kind we like getting.