(Version control/extensions) Automatic archiving of source text with relevant extensions
Make it possible to save a source text archive together with the current forms of whatever extensions it is using, to make it easier to reconstruct later.
Just one more would-be-nice thought - it would be nice if Inform would search multiple levels deep within the Project Extensions folder. That way it could be used with multiple git submodules, so that an author's extensions don't need to be in one place. If that doesn't make sense, don't worry, just ignore this comment!
It would be nice to have a project extensions folder, for example Project Extensions, parallel to Project Materials etc. Much easier for using SVN/Git/etc.
Related: When releasing along with source code, have the extensions used by the source copied to the release folder, or have a separate "release along with included extensions" option.