Q79's done-means allows either retiring the overlapping surface or naming
which file is canonical, not both. Retiring sha256_manifest.py would break
test_sha256_manifest.py and the reply-01..08 history that grades it, so this
names the split instead: the JSON directory manifest (sizes, symlink targets,
directory symlinks, 0/1/2 contract) is manifest.py; the plain
`digest path` text shape stays in sha256_manifest.py. One docstring, no
behaviour change.
CHECK: python3 -m unittest discover -s wizard-work/beam -p 'test_sha256*.py' -q
volt
25e88f8426