Subj,
example you added: zabbix[host,discovery,interfaces]
Where i can see what returned by that item?

Thanks.
—
P.S. Yes, in theory i can look to Source code at SVN,
but you don't provide Online SVN browser for that, like OpenWRT have.
You not allow http RO access for that, to browse code (may be your SVN server is not Apache svn and can't do that).
You not update your github mirror.
Cloning your repo to get history and search in it, also consume a time.
i.e. you current model of working on source code have some barriers to easy look at the code.