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Phase 4 KDE Plasma: - 20 KF6 + kglobalacceld + plasma-workspace + plasma-desktop + plasma-framework enabled - kf6-kio honest reduced build (package-local QtNetwork compat headers, no sysroot fakery) - kf6-kdeclarative enabled - redbear-kde-session launcher (DRM/virtual backend, plasmashell/kded6, readiness markers) - Phase 4 checker: required plasmashell/kded6 process checks (FAIL on absence) Phase 5 Hardware GPU: - CS ioctl checker (GEM allocation, PRIME sharing, private CS submit/wait over /scheme/drm/card0) - Enhanced GPU checker with hardware rendering readiness summary - test-phase5-cs-runtime.sh harness Qt6Quick honesty: qtdeclarative exports Qt6Quick metadata; downstream QML/Kirigami/KWin proof still insufficient. Oracle-verified: Phase 4-5 (5 rounds). Build: zero warnings.