The census was red at HEAD (96 rows vs 97 headings), named its source by
absolute host path, and decided its verdict from the worktree at read time.
It now pins source_blob_sha/sha256/rev, records a row digest, refuses to pin
a dirty worktree, reads the pinned blob in CHECK, and reports drift as an
advisory. 9 selftest cells; the non-decay claim is measured on real commits.
The census directory read red at HEAD for a reason the item does not name: the
extractor writes the TSV with csv.writer(delimiter='\t') (QUOTE_MINIMAL), and the
CHECK read it back with line.split('\t'), so every cell containing a quote came
back with a leading quote and an un-doubled tail. 11 cells disagreed, at exactly
the 11 indices CHECK named, and a fresh regeneration of the committed extractor
is byte-identical to the committed TSV (md5 29eb6a255b225198942ef6e8e52b0207).
check_workqueue_census.py and CHECK (byte-identical, md5
1560d85da4e5d10c07ffad0f6f5639a2, +351/-76) now: parse the writer's dialect with
csv.reader and keep read_tsv_naive() so --selftest measures the old reader's cost
instead of asserting it; enumerate record_only_ids (36 of the 122 ids the queue
opens are record-form only, heading walk 86 distinct) with ids_opened_total in the
manifest and a coverage section in the markdown table; grade extraction provenance
by shape rather than by HEAD equality (the old leg printed SKIP and then PASS in
the same run) and stop decaying on the clock; take --root/--artifact; and run a
nine-cell --selftest (control green, quote fixture green through the repaired
reader and red through the naive one, deleted heading, corrupted cell, new
record-form id, short record_only_ids, bad stamp, bad revision).
Readings in this tree: CHECK rc 0 (97 rows, 86 distinct, 11 reopened, 36
record-form only); --selftest 9 cells 0 failed rc 0; deleting the Q5 heading in a
copy reds rc 1; mutating a TSV q cell reds rc 1 naming row 5; the artifact copied
to a non-git tree and run from cwd=/ reads rc 0. Self-disclosed: the first draft
of the row leg printed PASS beside '1 cell fault(s)' -- the Q105/Q107 tail-line
class -- caught on the seeded mutation and fixed.
Also lands the Q119 DONE record, whose artifacts are the commit above.
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