Pretty much what other have said: if you want to retain the ability to code, you're going to have to keep coding. The bare minimum would be running through the

Pretty much what other have said: if you want to retain the ability to code, you're going to have to keep coding. The bare minimum would be running through the exercises on various coding sites, such as HackerRank. What would be best is to devote a weekend a month (more if you can afford the time) to actually building something, be it a mobile app, web site, etc. for something that interests you. Also, bear in mind that the farther along you go in your career, the harder it becomes to switch tracks. If you go more than a decade without coding professionally, it may be hard to get yourself considered for a coding job by many employers without an exceptional demonstration of your coding skills.