Word
Usage limit
A usage limit is a ceiling on how much you can ask your AI assistant to do in a stretch of time, after which it stops you until it resets.
Also called: rate limit, you've hit your limit
Hit it and the agent stops mid-task and says so, which is alarming the first time and looks exactly like something breaking.
Nothing broke. Your files are exactly as you left them, saved work is still saved, and the project is untouched. The limit lifts on its own.
The one useful habit: before you walk away, write down what you were in the middle of. When it resets, tell your agent where you stopped rather than starting the explanation over.