Hey guys! Some of you out there (unfortunately, probably not that many) may have heard of the terminal emulator Kitty. It's cross platform, fast, and quite customizable. Long story short, I replaced Terminal.app with Kitty (iTerm never seemed to meet my needs). However, it took quite a lot of work to get Kitty to work when I entered a shell command (i.e. "> echo hello") into Alfred. At last, after much messing around, I finally got it working, and have come to share how I did that in case anyone else wants to do it too.
Go to Features > Terminal / Shell and change Application to "Custom."
Copy and paste this AppleScript into the box that shows up under the Application dropdown.
That's all it takes! It took me about an hour and a half to make that work properly. I could easily get it to run a command, but not with the directory set to ~, the .bashrc file loaded, and then keep the window open after finishing the command. All of these things were important to me, so after much tinkering, I made it work.
Note: this only works, of course, if you are using bash. If this is not the case, you can likely copy and modify my script and RTFM.