This is a really low priority enhancement, but it would be nice if it would be possible for users to define their own custom chat formats for those who want to use the chat encryption feature on servers that use a custom chat format (and convert player messages to system messages).

Here's some examples I've collected:

• EssentialsX public chat: <UsernameOrNickname> MessageContents
  • {"extra":[{"text":"<"},{"color":"red","text":"Karen/あけみ"},{"text":"> a"}],"text":""}
• EssentialsX /msg DM (sending): [me -> RecipientUsernameOrNickname] MessageContents
  • {"extra":[{"bold":false,"color":"gold","italic":false,"obfuscated":false,"strikethrough":false,"text":"[","underlined":false},{"color":"red","italic":false,"text":"me"},{"color":"gold","italic":false,"text":" -> "},{"color":"red","italic":false,"text":"Karen/あけみ"},{"color":"gold","italic":false,"text":"] "},{"italic":false,"text":"a"}],"text":""}
• EssentialsX /msg DM (receiving): [SenderUsernameOrNickname -> me] MessageContents
  • {"extra":[{"bold":false,"color":"gold","italic":false,"obfuscated":false,"strikethrough":false,"text":"[","underlined":false},{"color":"red","italic":false,"text":"Karen/あけみ"},{"color":"gold","italic":false,"text":" -> "},{"color":"red","italic":false,"text":"me"},{"color":"gold","italic":false,"text":"] "},{"italic":false,"text":"a"}],"text":""}
• EssentialsX + Multiverse public chat: [World]<UsernameOrNickname> MessageContents
  • {"extra":[{"color":"white","text":"Creative"},{"color":"white","text":"]"},{"text":"<"},{"color":"red","text":"Karen/あけみ"},{"text":"> a"}],"text":"["}
• Very customised VentureChat public chat: [ProxyBackendServerPrefix | VentureChatChannel] UsernameOrNickname: MessageContents
  • {"extra":[{"extra":[{"color":"white","text":""},{"color":"dark_gray","text":"["},{"color":"yellow","text":"L "},{"color":"white","text":""},{"bold":true,"color":"white","text":"| "},{"color":"dark_green","text":"Global"},{"color":"dark_gray","text":"]"},{"color":"white","text":""},{"clickEvent":{"action":"run_command","value":"/help"},"color":"white","hoverEvent":{"action":"show_text","contents":{"extra":[{"text":""}],"text":""}},"text":""},{"color":"white","text":" "},{"clickEvent":{"action":"suggest_command","value":"/msg akemin_dayo"},"color":"white","hoverEvent":{"action":"show_text","contents":{"extra":[{"color":"gold","text":"Username: "},{"color":"white","text":" akemin_dayo"}],"text":""}},"text":"akemin_dayo"},{"color":"white","text":""},{"color":"dark_green","text":":"}],"text":""},{"color":"white","text":""},{"color":"white","text":" a"}],"text":""}

I think I can take a more universal apprroach, now that commonalities in those custom formats are apparent.

From my understanding most custom chat formats should now be compatible with encryption, but I ask that you redo your tests with v1.13.4, just in case.

I can confirm that after 32384f2, chat encryption now works with all the custom chat formats listed above!