--- name: sidebar-design-principles description: Audit, design, and refine a macOS sidebar for SwiftUI, AppKit, or Electron. Produces measurable findings, implementation changes, and visual-regression tests using Apple HIG as the normative baseline and Linear/ChatGPT as product-pattern references. version: 1.0.0 Sidebar Design Review Mission Create a sidebar that feels native to macOS, remains calm in an information-dense product, and makes frequent navigation fast without competing with the main content. The sidebar is navigation chrome, not a dashboard. It should orient, switch context, exp…