Setting the wrong font family silently fails and the default font is used instead

[feketegy]

When I list out the available fonts with ghostty +list-fonts I get a listing something like this:

If I set the following config font-family = "SF Mono Regular" for the preferred font, Ghostty can't find it and silently reverts back to the default font which is JetBrains Mono.

I have to set font-family = "SF Mono" in order for Ghostty to pick it up and use it.

I think this is a little bit confusing and not consistent because for setting bold, italic and bold italic then I have to set it like:

font-family-bold = "SF Mono Bold"
font-family-italic = "SF Mono Regular Italic"
font-family-bold-italic = "SF Mono Bold Italic"

Also, if I would like to use, for example, Semibold as the default weight, instead of Regular, I can't set it like font-family = "SF Mono Semibold" because this will revert back to the default font.

I guess I would have to set it like...

font-family = "SF Mono"
font-style = "Semibold"

...which is, again, a little bit confusing, I believe.

[rhodes-b]

This is the currently expected behavior due to font-fallback (on why it silently fails). Fonts may not include many symbols (especially unicode ones) so ghostty will attempt to fallback to either the default font or a font it thinks has good features.

You can see which font a symbol comes from with
ghostty +show-face --string="X" where x is whatever symbol you want to use to verify font (if you use some symbol your font does not support it will try to fallback to another font)