RE: How do I implement Program AB with bot libre?

I'm not familiar with Program AB, but Bot Libre does support AIML.

For AIML see,

https://www.botlibre.com/manual-aiml.jsp

https://www.botlibre.com/forum-post?id=28654

Bot Libre also supports response lists, Self scripting, and Regular Expressions,

https://www.botlibre.com/manual-responselist.jsp

https://www.botlibre.com/forum-post?id=483549

https://www.botlibre.com/manual-self.jsp

https://www.botlibre.com/manual-regex.jsp