What is the text in the frame header of Terminal on startup?

Question

When I start up a Terminal window on macOS, the following text scrolls by in the frame header:

I recognize a few of my brew'd packages like pyenv in there, as well as some basic posix packages, but I'm not sure of where its all coming from.

Answer 1

As someone said in the comments, they are the programs being run by your startup scripts. You can also control what the terminal title is using:

# Set terminal window and tab/icon title
#
# usage: title short_tab_title [long_window_title]
#
# See: http://www.faqs.org/docs/Linux-mini/Xterm-Title.html#ss3.1
# Fully supports screen, iterm, and probably most modern xterm and rxvt
# (In screen, only short_tab_title is used)
# Limited support for Apple Terminal (Terminal can't set window and tab separately)
function title {
    # forked from OMZ, see https://superuser.com/a/344397/856545 for setting tab and window separately
    emulate -L zsh
    setopt prompt_subst
{
    [[ "$EMACS" == *term* ]] && return

    # if $2 is unset use $1 as default
    # if it is set and empty, leave it as is
    : ${2=$1}

    case "$TERM" in
        cygwin|xterm*|putty*|rxvt*|ansi)
            print -Pn "\e]2;$2:q\a" # set window name
            print -Pn "\e]1;$1:q\a" # set tab name
            ;;
        screen*)
            print -Pn "\ek$1:q\e\\" # set screen hardstatus
            ;;
        *)
            if [[ "$TERM_PROGRAM" == "iTerm.app" ]]; then
                print -Pn "\e]2;$2:q\a" # set window name
                print -Pn "\e]1;$1:q\a" # set tab name
            else
                # Try to use terminfo to set the title
                # If the feature is available set title
                if [[ -n "$terminfo[fsl]" ]] && [[ -n "$terminfo[tsl]" ]]; then
                    echoti tsl
                    print -Pn "$1"
                    echoti fsl
                fi
            fi
            ;;
    esac
} >/dev/tty

}