Identify only the running job you created

A process is a running program instance. Its PID is an operating-system
identifier; a jobspec belongs to one shell. Compare jobs -l before and
after creating your harmless wait. The example %1 is usable only if
that new job is currently job 1. Otherwise use its current identifier,
or let the wait complete naturally. Never paste this sheet as a script.

The timeline is a prediction, not a running job.
Run in one Bash terminal in owned guest; sleep is harmless waiting.
sleep 60 &
jobs -l
Identify only that sleep job; use its current jobspec, e.g. %1 if it
is actually job 1. Example numbers are not a real target.
kill %1
wait %1
jobs -l
kill normally requests termination, not deletion of a stored file.
wait may return a nonzero termination status; jobs may already be empty.
If sleep finished naturally, do not reuse a stale PID or jobspec.
Fallback timeline: created sleep job -> listed -> terminated or completed.
Question fixed row: PID 731, command sleep; file suffix .txt is separate.
Which identifies this running instance for PID-directed kill? PID/extension