New split layout framework for nearly all Apple platforms (macOS, iOS, etc.)

Mitchell Hashimoto is a well-known software engineer and the co-founder of HashiCorp (creators of industry-standard tools like Terraform and Vagrant). This tweet announces a new split layout framework he built for Apple platforms — likely an open-source Swift/SwiftUI library for building resizable, multi-pane interfaces (like a code editor or file manager) on macOS, iOS, iPadOS, and visionOS. Split layouts are notoriously tricky to implement well on Apple platforms because SwiftUI's native split view is limited and AppKit's is complex. Hashimoto's work on developer tools and infrastructure gives this announcement weight: it signals that a serious, production-minded engineer has created a solution for a common pain point in Apple app development. The tweet gained traction because the community trusts Hashimoto's taste and engineering standards.