can you share properties defined in pom.xml for host/credentialsI mean you can surely hide host name and password but I wanted to look at the property names

As of now sightly does not support list sorting.Backend call to 3rd party -  Process this in sling modelFrontend call to 3rd party - Use JS

You can use Activation Treelocalhost:4502/etc/replication/treeactivation.html

I don't this happening with 6.3 + SP1You might want to check in a new AEM instance to confirm its not custom CSS which is affecting this

you don't have to remove it from the source locationyou have to remove it from the place where you have your overlayed clientlib under /apps (destination)

You can use OOTB servlet in AEM author at /bin/tagcommand with POST callscom.day.cq.tagging.servlets.TagCommandServletIt will create tags for yousample post data

You can use @ extension attribute in sightlyExample:Will add .html to the internal page url<a href="${ '/content/project/en' @ extension='html'}">Internal Link </a> Will not add .html to the external domain url<a  href="${ 'http://www.adobe.com' @ extension='html'}">External Link </a>

If you have js.txt at both the places, it will include clientlibs twice.You can remove js.txt from path where you have overlayed clientlib

If you want this feature from OOTB AEM? - Not supportedBut you can follow approach mentioned here for these attributesGitHub - nateyolles/aem-clientlib-async: Create AEM clientlibs that can output 'async', 'defer' and 'onload' attributes … https://github.com/nateyolles/aem-clientlib-async

1. Question will still be there from AEM 62. Docs for older version <=6 has been removed but you can download the docs package on your local aem and prepare for certificationhttps://helpx.adobe.com/experience-manager/aem-previous-versions.html