The trust and minimal involvement are really key here, the best managers I've ever worked with have been enablers rather than taskmasters. Managers that remove roadblocks, provide you with exactly the tools you need, insulate you from unnecessary cross-chatter, and just let you kill it with as few distractions as possible.
Those sorts of enablers are how you not only maintain, but increase the output of your developers.
Those sorts of enablers are how you not only maintain, but increase the output of your developers.