IMO the take away from command-line interfaces is compact, precise and minimal design. In a transitional shell prompt like #~$, each character has its meaning. Merely copying these symbols to a watch face is the exact opposite spirit of command like interfaces.
Cool project, but I also noticed the weird choice of #:~$ as a prompt, it uses almost half the width of the clock screen. And isn't # normally used to denote root shells? I don't think I ever saw it together with $.
My favorite prompt is >: as a callback to the Swan computer in the TV show Lost (not sure if it's also used in early Apple computers).
A prompt including > can be dangerous since that character also does shell output redirection. A sloppy copy/paste could, in theory, overwrite an important file.
The usually trick here is to use a unicode character like ⟫ (U+27EB) instead, which looks basically the same, but isn't interpreted as a redirection by the shell
Using computers since 1986, not sure where I can find such precise and minimal design, when it is impossible to use them without a manual, there is no discovery, and most commands have an endless list of options.
The manual is there usually: type `man`, or `help`, or run the command with `--help`.
Most GUIs also have "endless" pages of options. Grouping them helps quite a bit.
Having many options is usually considered the trait of the rich and powerful. Studying them for the tools you use often may actually save time, compared to googling around the bush every time.
IMO the take away from command-line interfaces is compact, precise and minimal design. In a transitional shell prompt like #~$, each character has its meaning. Merely copying these symbols to a watch face is the exact opposite spirit of command like interfaces.