The worktree cleanup step was documented as "safe to skip if the
sprint didn't use ephemeral worktrees" — which invited a pre-check.
Sprint 36 close did that pre-check from inside the repo root, where
.sprint/ doesn't exist, concluded no worktrees, and skipped teardown.
Three stale worktrees persisted until Sprint 37 planning surfaced them.
Fix: always run the script (idempotent, prints a graceful message when
empty). Document that .sprint/ is a sibling of the repo root, not a
child, so future sessions don't repeat the same ls-based pre-check.
Add a post-run verification step.
jpmschweitzer
f0465e40c1