Forerunner stellar manipulation 1

“The last problem remains taming young stars,” he said. “But we’re working on that. We send in stellar-class engineers equipped with third-class ancillas—plasma jockeys, we call them. They love the heat, but most vanish after a few hundred years—just go away. We don’t know what becomes of them. They get the job done, though.”
(Halo:Cryptum; Ch.27)