I use ZSH -- sort of like BASH on steroids. There are a gazillion prompts you can use in zsh.

Here is my GoTo Prompt:

PROMPT="[%B%F{cyan}%n%f@%F{red}%m%F{green}%~%F{white}%}]%F{magenta}%}/%F{yellow}%}>%F{white}"

The best prompt, works in bash, zsh and fish:

https://starship.rs

Under zsh, my prompt indicates the success or failure of the previous command (green check mark or red X cross), user @ host and the last component of the current path. The right part of the line contains the full path and the return code of the previous command. This right part appears only on the prompt line and disappears as needed to accommodate the command line I enter.
Forgot from which site I get the tricks but find it quite handy as I have all the information I need and the terminal stays rather 'clean'.
BTW, the user is red when root.

Jean-Pierre

in tcsh

set prompt="$prod%{`tput smso`%}%m:%{`tput rmul;tput dim`%}%/ %h %#%{`tput sgr0`%} "

resulting is a colorful

hostname:/full/current/path 123 >

I als have

alias cwdcmd 'glob "^[]0;'${LOGNAME}'@'${HOST}':$cwd ['$$':'$tty']^G"'$

which puts the infor for each xterm in its title bar, so it is easy to pick the richt one from the taskbar

set prompt = "$cwd:t \! > "
alias cd 'cd \!* ; set prompt = "$cwd:t \! > "'

(the last par of the current directory path plus the current command number e.g.
Temp 8 >

Anything else will be too long.

However all terminal windows title bars include host, user and tty number ... sort of

set a = `hostname`
set aa = `echo $a | tr . '\040'`
set bb = `tty | cut -d/ -f3-`

Host $aa[1] : user $USER on terminal $bb

I have appropriate escape sequences for (vestigial) vt300: vt200: vt100: sun-cmd: dtterm xterm: xterm-256color
This means also commands used to make remote access (rlogin telnet ssh) are aliased to repristinate the title bar when returning to the current machine after logout.

Been like that since ages (when we were still Unix)

PS1='[\u@\h \W]\$ '

PS1="`date +%a` \A \u@\h: \W\$ "

Two favorites.

1. The hostname.

PS1="`uname -n` # "

2. My username.

PS1="`whoami` # "

You would not know which of the gazillion zsh themes that one is?? The prompt I laid out is a simple functional PATH= command though I'd like to mess with your theme. Two that I am currently play with are "fox.zsh-theme" and "gnzh.zsh-theme". A third one I am looking at is "bira.zsh-theme".

Thanks

The best prompt is empty one :-)

Do tell, where does one get "slackware line art", please?

That is so interesting. Do you have a screenshot? What do you mean by the "right part of the line"?

I also use the return code of the previous command in my root prompt, but never thought of displaying the previous command that failed.

Is such a thing even possible under bash, I wonder?

That certainly is an interesting idea. How do you capture the time the previous command took to run?

username@computername $