Fv3 2026.04 test (#84)

* update to use FV3-202604-test tags of components

* added Release notes and chnaged the tag name

* Fixed the tag name

---------

Co-authored-by: Vithika Shah <Vithika.Shah@noaa.gov>

Author: laurenchilutti

CHECKOUT_code

@@ -78,12 +78,12 @@ echo ' '
 echo 'Checking out files for: '$config_name
 echo ' '
 
-release="main"
+release="FV3-202604-public"
 
 fv3_release=$release
 phy_release=$release
-fms_release="2025.04"
-fms_c_release="2025.04"
+fms_release="2026.01"
+fms_c_release="2026.01"
 drivers_release=$release
 land_release="2025.04"
 

RELEASE.md

@@ -0,0 +1,20 @@
+# RELEASE NOTES for SHiELD build 202604: Summary
+FV3-202604-public --- April 2026 
+Primary Point of Contact: Lucas Harris, GFDL lucas.harris@noaa.gov  
+
+This version has been tested with:  
+FV3 release FV3-202604-public from https://github.com/NOAA-GFDL/GFDL_atmos_cubed_sphere  
+SHiELD physics release FV3-202604-public from https://github.com/NOAA-GFDL/SHiELD_physics  
+FMS release 2026.01 from https://github.com/NOAA-GFDL/FMS  
+FMS Coupler release 2026.01 from https://github.com/NOAA-GFDL/FMScoupler  
+Atmos Drivers release FV3-202604-public from https://github.com/NOAA-GFDL/atmos_drivers  
+
+This release includes the following:
+- Significant updates to support full FMSCoupler with SHiELD support (@JosephMouallem)
+- Support for LM4 (@JosephMouallem)
+- Updated to latest developmental MOM6 and SIS2 (@JosephMouallem)
+- Environment updates, including additional Stellar environment and update to support Gaea programming environment update of 17 June 2025 (@laurenchilutti, @Biao-Zhao)
+- shield build option now compiles full coupler; old simple SHiELD coupler option eliminated (@JosephMouallem)
+- RTS, Build, and CI updates (@JosephMouallem, @vithikashah001) 
+- Full coupler documentation (@JosephMouallem)
+