- stopLoop re-arms the poll ticker after removing one loop, so stopping one of
several no longer strands the rest with no tick scheduled (jatmn).
- a bare self-paced /command is rejected with a pointer to the interval form:
self-paced drives a free-form goal via the playbook + LOOP: control line, which
a custom command's expanded template never carries, so it would silently
degrade to adaptive polling (jatmn).
- /resume only tears loops down on an actual session-id change; /resume latest or
/resume <currentID> can resolve to the already-active session, whose loops are
its own, not a "previous" session's (CodeRabbit).
- tests: skipped-behind-modal loop stays scheduled, footer carries the next-wake
time, the confirmed /clear actually wipes the transcript, plus multi-loop stop
keeping the ticker alive and self-paced-/command rejection.