Self-made IME

• I’m interested in creating my own IME (Input Method Editor), inspired by (masui) who seems to be doing it.
• However, I don’t have any complaints about the current functionality of IMEs.
• I would be most happy if I could extend the functionality in a way similar to Scrapbox’s UserScript.
  • I would like to try something like IME as an Assistant Interface.
    • Maybe integrating it with Scrapbox, for example.
• I’m currently trying out Gyaim just to see.
  • If Gyaim feels comfortable to use, I wanted to build on that.
    • But it doesn’t quite feel right.
• By the way, I also tried using Google Japanese Input.
  • I wonder if Mozc can be extended.