Mx-Iris

Use when writing or reviewing AppKit UI bound with RxSwift through RxAppKit — connecting NSButton/NSControl actions, binding NSOutlineView/NSTableView/NSCollectionView data sources, or driving view visibility (isHidden) and other state from Rx streams. Triggers especially when about to declare `PublishRelay<Void>()` + `@objc` action wiring, or hand-roll an `NSOutlineViewDataSource` / `NSOutlineViewDelegate` for data already produced by an Rx pipeline.

Use when adding os.log instrumentation in Swift code that depends on FrameworkToolbox — applying `@Loggable` to a type, writing `#log(.level, ...)` calls, configuring custom subsystem/category/access level, choosing a privacy level, or debugging logger setup and pre-macOS 11 fallback behavior.