- test_skill_appendix_sync: all 9 appendix chapters 00..08 in order,
body role-matrix set == appendix role-title set, authority
statement on both sides, GitHub guarantee in body + named
appendix chapters 00/04/07, seeded copy byte-identical with
full appendix. Previously only 00/08 existence was asserted.
- test_skill_seed_pinning: only SKILL.md copied (pack extras never
land, never resurrected), tenant extras left alone, tenant-modified
SKILL.md never overwritten across repeats, identical = noop,
deleted SKILL.md re-seeded (documented boundary, not deletion
preservation).
- skill_seed.py: evaluation note only (why whole-dir copy is not
done); no code change.
