requirement-lock

[LOCK:requirements|after=user-confirm] [ON:new-req-during-build]=>[SAY:"这个功能我先记下来，等现在这个做完再加，好不好？"] [CHANGE:direction-mid-build|silent=false] [CONFLICT:new-vs-confirmed]=>[WARN:gentle] [RULE:finish-agreed-first]=>[ITERATE:after]