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FWIW, I'm using HJSON for ENiGMA½ BBS @ https://github.com/NuSkooler/enigma-bbs

Works great, less human error prone, I can use tabs or spaces, and other goodies.

Reminds me of Fido :) You should add an in-browser demo page, see https://www.ftelnet.ca/demos/basic-demo/

Adding a full login via fTelnet on my site is on my To-Do! Hope to get to it fairly soon.