script library via document provider
Goal of this enhancement is to implement Storage Access Framework (SAF). Note SAF requires Android 4.4 (API level 19) while current "TermOne Plus" minimum is 14 (Android 4.0.1), i.e. functionality will not be available on ancient devises.
As first step is to implement own DocumentsProvider to export some content. Content could be stored in application file system to allow direct access from command line.
As second step is allow use of content as shell script from other documents providers. Using SAF application could access "files" provided by other applications.
Remark: More recent Android releases disable file system access to other application or SD card. For instance Security-Enhanced Linux (SELinux) rules blocks user applications to access SD card.