Introduction ============ This is the documentation for SASTAdev, a set of python scripts useful for the development of new versions of SASTA. **Warning** The writing of ths documentation is **WORK IN PROGRESS**, so parts are still lacking or are incomplete The SASTAdev modules can be found in the git repository https://github.com/UUDigitalHumanitieslab/sastadev. There is also a whole range of scripts that are useful in developing SASTAdev but that are not part of it. It has separate documentation, which can be found here: https://github.com/UUDigitalHumanitieslab/sasta-scripts. Data for the development of SASTA and SASTdev are maintained in the git repository https://github.com/UUDigitalHumanitieslab/sasta-datasets. The SASTA application itself is maintained in the git repository https://github.com/UUDigitalHumanitieslab/sasta.