Setup CODEOWNERS

.github/CODEOWNERS

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+# = Code Owners =
+#
+# The purpose of this file is to list ownership of the various components
+# held within the MOCI repository.
+#
+# Please consider the following:
+#  * Ownership is not a commitment for the individual to undertake all work
+#    requested or all reviewing for the owned section
+#  * Any planned changes to a section should be discussed with the code owner
+#    to ensure plans are appropriate
+#  * Code owners should be given the option to be a science/technical reviewer
+#    for any code that alters their section
+#  * Any interface between components needs to be agreed by all affected parties
+#
+# Contact details for code owners:
+# https://code.metoffice.gov.uk/trac/home/wiki/UserList
+#
+# Only lines of the form "<path pattern> <@owner> [@owner ...]" are active
+# rules. Areas without a known GitHub owner are kept as comments so the
+# original ownership table is preserved.
+
+# = Coupling Applications: Contacts =
+# These are external contacts rather than repository paths, so they are
+# recorded here for reference only.
+#
+# Area                          Owner
+# UM                            umsysteam@metoffice.gov.uk
+# NEMO                          timgraham
+# SI3                           davestorkey
+# CICE                          davestorkey
+# MEDUSA                        NOC_southampton
+# LFRic                         timgraham            richardhill
+# Wave                          juancastillo
+# Rivers                        dancopsey            juancastillo
+# OASIS_MCT                     harryshepherd
+# XIOS                          harryshepherd
+# CPMIP
+# mule                          umsysteam@metoffice.gov.uk
+# iris                          ml-avd-support@metoffice.gov.uk
+
+# = MOCI Components =
+# == Applications ==
+/rose-stem/                             @ericaneininger @Pierre-siddall
+/Coupled_Drivers/                       @Pierre-siddall @ericaneininger
+/Postprocessing/                        @ericaneininger
+# /Fortran_Cap/
+# Coupling_Documentation                dancopsey
+
+# == Configurations ==
+# /fcm-make/
+# /Infrastructure_Builds/
+# GC4
+# GC5
+# Global_Coupled_NWP
+# UKESM                                 janemulcahy
+
+# == Utilities ==
+/mocilib/                               @ericaneininger
+/Utilities/dashboard/                   @ericaneininger
+/Utilities/ozone_redistribution/        @ericaneininger
+# moci_testing_scripts
+# /Utilities/mean_nemo/
+# /Utilities/verification_scripts/
+# /Utilities/NGMS_utils/
+
+# == Rose meta data ==
+/rose-meta/archive_and_meaning/         @ericaneininger
+# /rose-meta/coupled_drivers/
+# /rose-meta/ocean_ice/                 davestorkey
+# /rose-meta/fcm-make-ocean/            richardhill
+# /rose-meta/GA7/
+# /rose-meta/GC3/
+# /rose-meta/GC3.1/