Research covers stack (NET10/WPF/PnP.Framework), features (v1 parity + v1.x differentiators), architecture (MVVM four-layer pattern), and pitfalls (10 critical pitfalls all addressed in foundation phase). SUMMARY.md synthesizes findings with phase-structured roadmap implications. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>