It’s a new font system for monospaced type that has some interesting features.
I’ve installed it (use the script in the package for total simplicity) and it looks great. The texture healing works great in Panic’s Nova, Microsoft’s VSCode, and macOS Terminal, that I have tested, so it probably works in plenty of other editors and terminal software.
They released version 1.101 three weeks ago … But I’ve only configured VSCode, yet. Not tested iTerm2.
Any news on iTerm2’s support for that font healing feature? They had a big 3.5 release a couple of days ago … Haven’t checked against font features, yet …
However, I’m currently using the MesloLGS NF font in iTerm2 and my prompt makes use of some special gylphs, like the Apple logo and a folder icon. Those are not in the monaspace fonts, unfortunately, so they’re a no-go for me, too. But just for iTerm2. Happily using them in VSCode!