_gitflow_purge_transient removes docs/superpowers/{specs,plans} on the
feature/bugfix branch just before the directed merge, so develop's tip
lands clean while the feature commits stay reachable as the archive
(git show <sha>:...). Best-effort: never aborts a finish (no-op when
absent, skip on dirty paths, restore index+tree on commit failure).
Opt-out GITFLOW_PURGE_TRANSIENT=0; purge-transient CLI verb. Automates
the manual post-merge cleanup BDR-065 left as doctrine (slipped once,
655e364). Universal via the ~/.claude/lib symlink. gitflow-test T17 a-d;
shellcheck clean; make test exit 0.
Bastien Chanot
9b89da29be