/usr/include/ is in libkpeople-dev 0.2.2-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/kpeople/
/usr/include/kpeople/global.h
/usr/include/kpeople/allcontactsmonitor.h
/usr/include/kpeople/kpeople_export.h
/usr/include/kpeople/personsmodel.h
/usr/include/kpeople/basepersonsdatasource.h
/usr/include/kpeople/contactmonitor.h
/usr/include/kpeople/persondata.h
/usr/include/kpeople/widgets/
/usr/include/kpeople/widgets/persondetailsview.h
/usr/include/kpeople/widgets/persondetailsdialog.h
/usr/include/kpeople/widgets/abstractfieldwidgetfactory.h
/usr/include/kpeople/abstractpersonaction.h
/usr/include/KPeople/
/usr/include/KPeople/AbstractPersonAction
/usr/include/KPeople/PersonsModel
/usr/include/KPeople/PersonData
/usr/include/KPeople/AllContactsMonitor
/usr/include/KPeople/ContactMonitor
/usr/include/KPeople/BasePersonsDataSource