Run 4240: two pre-write hook tests pinned the skip case and scribe_defs() inside scribe_prior_art.sh, which moved to the shared library; the after-write test saw the same derive key appended once per changed file. Keep each token once (sort -u after the appends) and point the pins at the library. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>