Trust me i have no intention of going back to my old ways and of putting 1lb back on
I've been on a maintenance regime for over a year now and have watched many go through the transitional period. One thing I would suggest would be you keep a pretty close eye on things for the initial, indeterminate period, so that you can learn how your body works in its new "normal" state. Like 99.99999% of the rest of the world, I'm certain your weight will vary a little from day-to-day. I know mine certainly does. If I have a carbier meal, that holds onto fluid as it is digested, which can mean the scales show a slightly bigger number whilst that works its way through my system. Similarly if I have an particularly mountainous pile of veggies, those can nudge the number on the scales up, without necessarily gaining weight in the more usually described manner.
My variances are only 1-1.5kg, but they are there, and as I still keep a food diary (it takes moments to update once established), if I see any sustained movements, up or down, I can flick back through my diary to assess if I should have concern or not.
Interestingly, I spend chunky periods of the year overseas these days and came back here (overseas) 10 days ago. Almost without exception people I am encountering are saying I have lost further weight in the period I spent in the UK. Aside from my daily variances and a slight downward shift after some recent surgery, which corrected itself as I recovered, I was pretty certain I hadn't, but I was curious enough to go back to my bathroom scales which have a memory chip.
When I went ohome at the beginning of May, according to those scales, I weighed 47.7kg, the morning I checked that I was 47.5, so a whole 200gr variance between the periods.
So, that clearly shows me my own knowledge that my body continued to adapt to a slighter, slimmer fram, continued after I stabilised weight loss. I certainly have dropped a size in trousers and skirts, as my waist suddenly got pretty tine, all on it's own.
So, I think all of that is saying, expect the unexpected. It's a whole new learning curve, and for me, the stabilisation and learning to understand my "new normal" took much more intellectual effort than the whipping bloods and body weight into shape ever did. It's something to get your head around, for sure.