Q:

How can I save text folds and folded code block data to .sublime-workspace?

Seems like there are no features in Sublime Text 2 that keep code folding between file sessions close\open. 
I'd like to write plugin for this, but have a question.
Where should I store fold-data such as which file, or region on the page is folded? My Only idea saves in .sublime-workspace
So, how I can access it and read my properties, attributes, or what meta-data not?
Where else can I store data such as what is required to persist fold regions?

A:

First of all, There's already a really nice plugin that does that and much more, it's called BufferScroll

Buffer Scroll is a simple Sublime Text plug-in which remembers and restores the scroll, cursor positions, also the selections, marks, bookmarks, foldings, selected syntax and optionally the color scheme.

Trying to answer your question, I did a quick check on BufferScroll source code and it seems that it store all data in Settings folder inside a Gzip file. on mac it's at ~/Library/Application Support/Sublime Text 2/Settings/BufferScroll.bin.gz
it's worth to mention that it's the same folder sublime text uses to store session, auto-save session and license files. 

A:

update sep 2017, using sublime 3, to make fold persistence after we close document, there is autofoldcode in package control, I just installed and it's working as expected. 

