The Best API Change Is the One Nobody Notices

Scene-aware custom containers in Factory, and the design that let the existing API stay put… The Best API Change Is the One Nobody Notices Scene-aware custom containers in Factory, and the design that let the existing API stay put… Michael Long in The Swift Cooperative   ∙   October 22, 2026   ∙   6 min read   ∙   View on Medium Factory logo by Michael Long Every library author eventually learns that new capability costs new API. A new feature means a new parameter, a new generic, a new protocol requirement, and a migration guide for everyone who already depends on you. It’s practically a law of nature. Sometimes. In my last article I introduced scene-based injection for Factory’s default container. It left a gap, and closing that gap looked like it was going to break things. It didn’t, and the reason why is worth a look. The Gap Here’s what scenes gave us. Install a Container at the root of each window, publish it in the environment… Continue reading This is a member-only story and can only be read on Medium. Sent to sikubaycom.s3cr3tz@blogger.com by Michael Long on Medium Unsubscribe from this writer's email notifications Manage your email settings 3500 South DuPont Highway, Suite IQ-101, Dover, DE 19901 Careers·Help Center·Privacy Policy·Terms of service