would very much like to see a small example of how to create, consume, and destroy those FIFOs...

Pretty simple. This creates a named pipe. One end of a shell command redirects to it, one end redirects from it. rm when finished.

	▲	akdev1l 4 hours ago \| parent \| next [-]
		You can just use process substitution cat <(secret-print my-secret)
	▲	SoftTalker 4 hours ago \| parent \| prev [-]
		In a shell script situation, you'd typically trap EXIT and ERR and remove the fifo in the handler.