ConcentricRectangle
LibraryReact concentric corner component
Use it when you want nested rounded corners in SwiftUI to curve around a shared center automatically
Apple's SwiftUI shape whose corners are configured to be concentric with a container shape's corners, introduced with iOS 26.
Added to the shelf
From the makersREADME, read 28 Oct
ConcentricRectangle is a React port of SwiftUI's ConcentricRectangle, a rectangle whose corners are squared, fixed, or concentric with the corners of the container around it. Its corner-style API and continuous corner curvature follow Apple's design. It ships as a React library and as a Claude Code skill, with no dependencies beyond React. It is an independent reimplementation and is not affiliated with Apple.
Install
mkdir -p ~/.claude/skills && unzip -o ~/Downloads/concentric-rectangle-skill.zip -d ~/.claude/skills/Commands
./install-skill.shInstalls the Claude Code skill to ~/.claude/skills
./skill/concentric-rectangle/scripts/install.sh ./src --no-testsInstalls the library into an existing project