I arrived at https://github.com/att/ast by clicking the big, friendly 'software' button on http://kornshell.com/. Having cast around on the former page for something - something installable - to do with the Korn Shell, I saw this release announcement:

That is boggling. The latest release is unsupported and actually ('This repo only hosts ksh93') . . that release is not in fact available? I gave up - before reading the two (!) issue pages that are billed as casting light. I did glance at the titles of those pages. So doing did not illuminate.
I arrived at https://github.com/att/ast by clicking the big, friendly 'software' button on http://kornshell.com/. Having cast around on the former page for something - something installable - to do with the Korn Shell, I saw this release announcement:
That is boggling. The latest release is unsupported and actually ('This repo only hosts ksh93') . . that release is not in fact available? I gave up - before reading the two (!) issue pages that are billed as casting light. I did glance at the titles of those pages. So doing did not illuminate.