Overview
DevDuo lets web developers interact with a real desktop WebView inside simulator-derived iPhone Duo screen geometry. Safari mode reproduces measured widget placement and viewport changes; immersive mode removes browser chrome and uses the whole logical scene.
The current reference inventory is Closed/Open × four body angles, with initial/scrolled Safari states and Open one-tab/multiple-tab variants. These are observed simulator states, not guaranteed physical-device dimensions or a complete browser implementation. A partially open hinge/perspective model is unavailable.
Start with the README, then follow Development, Architecture and the Measurement contract. Collect new observations using Calibration workflow; distinguish current checks from pending work in Validation.
The public checkout runs without raw evidence. Reference regeneration and full screenshot/source-frame verification require separately supplied local evidence. See Reference data, Windows handoff and the Host UI roadmap.