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Marouane Gazouzi releases Duology: 20 open-source skills that teach coding agents how to adapt apps for iPhone Duo foldable layouts, postures, continuity, lint, and pose screenshots.
Showing 30 of 30 collected skills.
Builds games for iPhone Duo, Apple's foldable. The game fills the closed outer display, the open inner display, book pose and tabletop by changing its aspect ratio instead of letterboxing, as Apple's HIG asks; touch controls stay off the fold; and in tabletop…
The fold linter for iPhone Duo, Apple's foldable with an outer display and an inner display. Run it to find code Apple says to remove before an app runs on the foldable; it reports each finding with the fix for its rule. Catches UIScreen.main and…
Screenshots an iPhone Duo app in every pose (closed, open, book, tabletop) on the iPhone Duo simulator by pressing Device Hub's pose buttons through the macOS Accessibility API, then writes summary.md and summary.json to review with the duo-design-review…
Entry point for iPhone Duo, Apple's foldable with an outer display, an inner display and a fold; use it first when someone asks to get an app ready for iPhone Duo, make it work on the foldable or survive fold and unfold, or doesn't know which Duology skill to…
Picks and builds layout patterns for iPhone Duo, Apple's foldable iPhone, in SwiftUI - list-detail, supporting pane, two-page, dual view, extended canvas, feed reflow with even columns, tabs to sidebar, and displacement off the fold. Use it when you design or…
Designs iPhone Duo screens for every pose Apple shows: closed on the outer display, open flat (wide or tall), partly folded like a book, propped on a table like a laptop (tabletop), standing like a tent, and open and turned around (flipped, rear cameras…
Creates a complete SwiftUI reading app for iPhone Duo, Apple's foldable: a library shelf, then one page on the closed outer display, two facing pages split at the fold when the phone is open and held wide or folded like a book, and in tabletop the page above…
Keeps app state alive when iPhone Duo, Apple's foldable, folds, unfolds, rotates or resizes between the outer display and the inner display. Use when scroll position, video or audio playback, typed text, keyboard focus, selection, form input, the selected…
Gets toolbars, navigation bars, tab bars, split views and sheets right on iPhone Duo, Apple's foldable, where bars move into one vertical bar on the side of the outer display and of the inner display in landscape. Use it when bars go vertical, items overflow…
Scenes and windows on iPhone Duo, Apple's foldable. Use when an app opens a second window (openWindow, WindowGroup(for:), activateSceneSession, UISceneSessionActivationRequest, UIWindowScene.ActivationAction), handles new-window requests on the outer display…
Creates a complete SwiftUI shop for iPhone Duo, Apple's foldable, that sells digital packs and a subscription with StoreKit 2: a product grid with even columns that reflows from 2 per row on the closed outer display to 4 on the open inner display with the…
Creates a complete two-player, one-phone SwiftUI game for iPhone Duo, Apple's foldable, where each player gets half the screen in every pose (closed on the outer display, open on the inner display, upright or sideways, partly folded). Use when someone wants…
Creates a complete SwiftUI personal finance dashboard for iPhone Duo, Apple's foldable: balance and recent spending in one column on the closed outer display; balance, a Swift Charts spending chart and the transaction list side by side on the open inner…
Creates a complete SwiftUI video and podcast player for iPhone Duo, Apple's foldable: a library list-detail, a full-screen player whose playback survives every fold, unfold and rotation, a tabletop layout (video above the fold, the same controls below), a…
Builds reading and document screens for iPhone Duo, Apple's foldable: one page on the closed outer display, two facing pages split at the fold when the phone is open and held wide or folded like a book, and in tabletop the page above the fold with page turns…
Widgets, Live Activities, StandBy and Controls for apps on iPhone Duo, Apple's foldable. Use it when you build or check a widget extension, a Live Activity, a Dynamic Island presentation, a StandBy layout or a Control Center or Lock Screen control, and the…
The iOS 27 SwiftUI changes that matter on iPhone Duo, Apple's foldable, where every fold, unfold and rotation resizes the app. Use it when building with Xcode 27.1 breaks a view (@State macro, ContentBuilder, TN3211), when a grid or list that reflows between…
App Intents on iPhone Duo: AppIntent, AppEntity with EntityStringQuery, OpenIntent with TargetContentProvidingIntent and onAppIntentExecution (UISceneAppIntent and AppIntentSceneDelegate in UIKit) to show the right item in the right pane or window,…
Adds Foundation Models to an iPhone Duo app: the on-device model (SystemLanguageModel) and the Private Cloud Compute server model (PrivateCloudComputeLanguageModel) behind one LanguageModelSession API, an AI side pane beside the content when the phone is open…
Video and audio playback on iPhone Duo, Apple's foldable. Use when an app plays video or audio and must keep playing through fold, unfold and rotation, when you build a tabletop player (video above the fold, the same controls below) or a book-pose player, an…
Camera capture on iPhone Duo, Apple's foldable. Use when an app takes photos or video, runs a video call or shows a camera preview, and must work closed (outer display), open (inner display), partly folded (book, tabletop), open and turned around (flipped)…
Makes iPhone Duo apps work with VoiceOver, Dynamic Type, Reduce Motion, Increase Contrast, hardware keyboards, Switch Control and Voice Control on both displays. Use it when VoiceOver reads two panes row by row or loses its place after the phone folds or…
Reviews screenshots, simulator captures and Figma frames for iPhone Duo, Apple's foldable, against a 15-point checklist (letterboxing, state lost on fold and unfold, sizing from UIScreen.main, text or buttons in the fold via reservedRegions .division and…
Design tokens and a drop-in SwiftUI token module for iPhone Duo, Apple's foldable, that adapt by size class instead of by device. Covers a 4-point spacing scale, system margins and gutters with a wider gap at the fold, even-column layout grids (4 compact, 8…
Puts controls where hands can reach them on iPhone Duo, Apple's foldable iPhone: one-handed on the closed phone, two hands on the open display, the book grip, and hands-free on a table. Use it when you decide where a primary action, a floating button, player…
Builds screens that two people use at the same time on one iPhone Duo, Apple's foldable iPhone - two-player games, teaching, showing a customer, kid and parent. Use when two people share the inner display or the outer display, sit side by side or face to face…
Makes fold, unfold, partial fold and rotation on iPhone Duo, Apple's foldable, feel like one app instead of a reload. Use when a screen flashes, blinks, jumps, reloads, pops or moves its controls as the phone opens or closes, or when writing or reviewing…
Writes and runs tests for iPhone Duo apps, Apple's foldable with an outer display and an inner display, on the Mac and on the iPhone Duo simulator in Xcode 27.1. Use when adding logic tests (swiftc script, or Swift Testing with @Test and #expect), UI tests…
Sets up a Mac to build, run and test apps for iPhone Duo, the foldable iPhone with an outer display and an inner display, covering Xcode 27.1 next to an older Xcode with DEVELOPER_DIR (no sudo xcode-select), xcodebuild -version, the iOS 27.1 SDK and runtime,…
Core layout rules for iPhone Duo, Apple's foldable. Use when content lands in the fold, a screen breaks on the inner or outer display, or you write SwiftUI or UIKit layout for a foldable. Covers size classes instead of UIScreen.main, idiom or orientation,…
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