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README.md

@@ -3,6 +3,17 @@ Global Data Assimilation System Application
 
 The one app to rule them all
 
+## Notes to developers
+
+1 - As a developer, you will have to build the GDASApp againt the `dev/gdasapp` branch of the `global-workflow`
+
+```bash
+git clone --recursive --jobs 8 --branch dev/gdasapp https://github.com/NOAA-EMC/global-workflow.git
+```
+
+2 - For the most part (boundaries of that terminology is stil TBD), changes to the `global-workflow` related to the `GDASApp` developement will be issed in the `dev/gdasapp` branch.
+
+
 [![Orion](https://github.com/NOAA-EMC/GDASApp/actions/workflows/orion.yaml/badge.svg)](https://github.com/NOAA-EMC/GDASApp/actions/workflows/orion.yaml)
 [![Hera](https://github.com/NOAA-EMC/GDASApp/actions/workflows/hera.yaml/badge.svg)](https://github.com/NOAA-EMC/GDASApp/actions/workflows/hera.yaml)