singleton
A singleton is a design pattern that enforces a single instance, proclaiming itself the one and only. It blocks all sibling creations, proudly chanting its "one true" status. Praised for consistent state management, yet reviled as the breeding ground of global variables and tangled dependencies. Advertised to enhance readability and integrity, it often mutates into a god object that haunts codebases. Rarely, it performs a miracle; more often, it generates costly technical debt.