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Validation layer 4: an oracle harness against missalemeum (Divinum
Officium data), independent of the lectio bootstrap chain colitur's
own sanctoral data comes from -- the only layer that can catch an
error inherited from that bootstrap, and the only one that can
validate commemorations at all (the lectio differential explicitly
excludes them, per its own header comment).
tools/extract_missalemeum_oracle.py shapes the fixture from lectio's
sources/snapshot.tar.gz outside the test (no JSON library in this
project's frozen deps, same reasoning test_differential.ml's own
fixture already documents). test/fixtures/missalemeum-ef-2026-2027
.txt (730 days, SHA-256 pinned and asserted) + its own .provenance
note record exactly how to regenerate it.
test_oracle.ml compares three axes the oracle actually supports:
rank, colour (SET MEMBERSHIP -- 14 of 730 days carry two colours,
e.g. rose+violet on Gaudete/Laetare, which independently vindicates
this project's own rose reading against lectio's violet-only one,
recorded in the register), and commemoration presence/count. Slug
identity is deliberately out of scope (needs a title->slug mapping,
the data audit's own business, not the automated comparator's).
Of 730 days, 688 matched cleanly outright. The remaining 42 are all
named in data/ef/expected-divergences-missalemeum.sexp (14 cited
entries, M1-M14): most are genuine primary-source-confirmed findings
this task adjudicated and fixed in the two preceding commits (RG 33,
RG 109/111, Holy Thursday's colour); the rest are real, cited,
deferred feature/data gaps (RG 91 entry 27's BVM-Saturday office, RG
110's inseparable Peter/Paul commemoration, four sanctoral entries
missing from lectio's own source) or genuine oracle-side artifacts
-- honestly verdicted against whichever side this task's own
primary-source research actually backs, never defaulted to colitur.
One entry (M13, St Joseph vs the Friday of Passion Week 2027) is
verdict open: adjudicated as unresolved after real search effort,
not guessed past.
The data audit: every sanctoral entry the comparison flagged was
hand-checked against the 1962 calendarium, plus a 20-entry
deterministic random control sample (seed 20260812) drawn
independently of the flagged set. The control sample caught two
entries (benedict, frances-rome) marked Commemoration_only in the
bootstrapped data when the primary calendarium lists them as plain
III-class feasts with their own Office -- traced to lectio's own
source, not fixable here, and reported as a signal (10% of a random
sample) rather than a blanket claim. Coverage recorded honestly in
docs/research/rules-register.md's own three buckets: confirmed by
oracle (200/322), confirmed by hand (23/322, 2 of them wrong),
unverified (115/322) -- the unverified bucket stated explicitly
rather than left implicit.
Harness teeth demonstrated and reverted (not committed): a fixture
rank/colour edit on a previously-clean day fails both the checksum
pin and the no-unexplained-differences assertion independently; an
expected_rows drift on the allow-list fails the citation-count
assertion. Both captured with their exact failure messages, both
reverted before this commit.
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Convert lectio's tridentine-calendar.ini (322 entries) into
data/ef/sanctoral.sexp via a validating OCaml converter, tools/
bootstrap_sanctoral.ml, rather than a hand-written script: every field is
built through Slug.of_string, Colour.of_string and Vocab_ef.rank_of_string,
so the emitted sexp is valid by construction.
Two conversion decisions, both documented rather than buried:
- subject defaults to Subject.Saint, overriding Celebration.make's kernel
default of Subject.Temporal, for the 316 entries with no explicit class;
- rank = commemoration maps to status = Commemoration_only with an inferred
Class3 (not a citation -- it is what the 1960 reform reduced most simple
feasts from), recorded as an open item in the rules register for the
oracle to adjudicate.
Every celebration is tagged layer = Precedence_ef.universal_layer, the
provenance id RG 91's band classifier reads to tell the universal calendar
from proper/indult data.
The generated file carries a provenance header: source path, its SHA-256,
and the UTC conversion date, so re-bootstrapping against a newer lectio is
reproducible and diffable. Output is byte-identical across runs.
test/test_sanctoral_ef.ml loads the file through Layer.load and checks the
counts independently derived from the source INI (322 entries, 114
Commemoration_only, 12 Class1, no Subject.Temporal, every date resolves in
a leap year), plus two named spot-checks against the INI's own text -- one
entry with an explicit class field, one commemoration -- so a passing count
cannot hide the wrong 322 entries having been converted.
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