>>31460
I went on to look into LynxChan's source code to see how sage input is treated. It uses toLowerCase() method of Javascript.
https://gitgud.io/InfinityNow/LynxChan/-/blob/master/src/be/engine/postingOps/post.js
And precisely, latest commit
https://gitgud.io/InfinityNow/LynxChan/-/commit/2d631fc342e93860c4e73662b0782184795565b7

var saged = (parameters.email && parameters.email.toLowerCase() === 'sage');

You can see how it works in browser console [F12]. Declare variable

let email = "sAGE"

Then

console.log(email.toLowerCase())

Should print lowercase

sage

To reassign it use this:

email = "sAge"

To cover all cases we'll then need to specify 2⁴=16 permutations of word sage since CSS does not support regular expressions (yet) :^)