Evennia does have a web admin, but main development work is intended to be done in Python code, really; what would be akin to 'hardcode' in LPMUDs, I presume. Evennia's extremely extendable, but not so much over the telnet command line; the choice was made to instead make it easier to develop a game in Evennia using modern dev workflows, using version control and proper code editors. All a matter of taste of course. :)