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Christmas-season dates
The bootstrap excluded 19 lectio bases as "date-keyed duplicates", but
17 of them were not duplicates at all: the 8 O-Antiphon days
(17-24 December) and 8 further Christmas-season dates (29-31 December,
2-5 and 7 January) each carry unique per-date content found nowhere else
among the emitted entries, verified against lectio's own ini directly.
17 December is Gen 49:2,8-10 / Matthew 1:1-17, but colitur was falling
through to that year's unrelated weekday-keyed "advent-3-mon" content
instead.
OLM n. 69.3 explains why: those ferias are fixed by civil date, unlike
every other Advent/Christmastide/Paschaltide feria, which is merely
non-alternating within a weekday slot. Temporal_of's own ferial slugs
for these dates are weekday-keyed, so looking one of those up served
whichever OTHER date happened to share that year's weekday alignment --
a citation that silently drifted year to year on ~16 real civil dates
(6 January stays excluded: Temporal_of fixes Epiphany there
unconditionally, so that date can never reach the ferial path at all;
two more, easter-6-thu and advent-4-sat, stay excluded for their own,
different structural reasons).
Fixed with a date-keyed lookup route (Lectionary_of.date_keyed_slug),
tried before the weekday-keyed one in readings' own step 3.
Temporal_of's slugs are unchanged -- only which lectionary key resolves
a day's citations. tools/bootstrap_lectionary_of.ml now maps the 17
bases to synthetic date-keyed slugs instead of excluding them, and its
own reachability sweep calls date_keyed_slug directly so the two can
never drift apart. Re-emitted data/of/lectionary.sexp (754 -> 770
entries) and corrected its provenance header, which previously
described these dates as excluded duplicates.
Also states, for the first time, a Minor finding from the same review:
190 of 222 shipped sanctoral slugs have no dedicated lectionary entry
and correctly fall through to the ferial per OLM norms -- expected
behaviour, not a gap, but never said in the coverage report before.
New tests pin 17 December (Gen 49:2,8-10 / Matthew 1:1-17) and 2 January
(1 John 2:22-28 / John 1:19-28) in two years with different weekday
alignments, proving neither reading drifts, plus direct boundary
coverage of date_keyed_slug itself (both windows, the 6 January
exclusion, and the Sunday guard).
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Task 4 of Phases 3-5: the last Rite.t field OF still needed, `readings`.
The cycle rules are CODE, cited to OLM (Ordo Lectionum Missae) 1981
Praenotanda -- verified against the real page image
(docs/research/of/olm-1981.pdf pp.32-33/"XXXII-XXXIII"), not the
document's own unreliable OCR text layer, per the design spec's own
caveat. n. 66 (with its footnote 102's worked example, 1980=C/1981=A/
1982=B/1983=C) gives the three-year Sunday cycle; n. 69 point 4 gives
the two-year weekday cycle, Year I in odd label years, Year II in
even. Both derive the "label year" the same way: one more than the
civil year Advent I opened in, per n. 66's footnote 102 itself
("nempe a prima hebdomada Adventus, quae cadit in anno civili
praecedente") -- so the cycle turns at Advent I, not 1 January, exactly
where the task brief said to get it right. The design spec's own
citation for the weekday rule, "Praenotanda n. 649", does not survive
a direct check against the primary source (search finds "649" only in
unrelated index/page-number entries); corrected here to n. 69, the
paragraph the rule's own Latin text actually sits under, confirmed by
the page image's own printed margin number.
The data is bootstrapped from lectio's of-lectionary.ini (988 keys,
niedziela.pl, harvest 2020-2025) by tools/bootstrap_lectionary_of.ml
-- OCaml, not the brief's own suggested .py: tools/bootstrap_lectionary
.ml already established this exact shape for EF, including a real
safety net ([assert_reachable], sweeping Rite_of.Temporal_of.temporal
AND the real merged sanctoral layer directly) that a second-language
reimplementation would either duplicate or lose. Handles two real
data anomalies found while building it: one malformed ini line (a
Polish Septuagint-numbering annotation for Sirach 3, "Syr 3,2-6.12-14"
against OLM/CEI/USA's shared Nova Vulgata, matching the design spec's
own sec5 finding); and two Sunday-cycle-labelled bases (Annunciation,
Immaculate Conception) where a scraping-year artifact left one of
three cycle letters carrying a different day's Mass entirely --
resolved by a general, mechanical 2-of-3 majority rule, not a
per-saint hand edit, and logged.
Coverage measured in both directions, per the brief's own Step 1:
- 1 of 365 days in civil year 2026 (25 December, the Christmas DAY
Mass) has no Temporal_of-slug match anywhere in lectio's 988 keys --
only the Vigil is present. Named in the data file's own header.
- 0 of 438 distinct lectio bases map to no colitur slug, after 19 are
deliberately excluded (late-Advent/Christmas-season DATE-keyed
duplicates lectio also carries in a WEEKDAY-keyed form colitur's own
slugs actually match -- Lectionary.t has no date-keyed lookup at
all, so the date-keyed family is transcription-inert, not silently
dropped: named explicitly, not a residual).
Lectionary_of.readings is three steps (no Commons indirection, unlike
EF -- out of this task's scope): the observed celebration's own
embedded citations; else, for a real sanctoral winner, its own slug
looked up directly (flat, then both cycle letters); else the day's
own temporal slug, same lookup. No preceding-Sunday fallback: OF's own
two-year cycle assigns every Ordinary Time weekday its own reading by
design, and no OF norm was found instructing otherwise.
Tests (test/test_lectionary_of.ml, 12 cases): a cycle-arithmetic table
straddling Advent 1980/1981/1982/2025 inside single civil years,
reproducing OLM n.66's own worked example directly; SHA-256 pins on
both the emitted file and lectio's own source (embedded in the
provenance header); a pinned, NAMED 2026 coverage result (364 resolve,
exactly {25 December} does not -- never a bare count); two resolution-
chain spot checks (a plain ferial, and a saint's day beating the
ferial it would otherwise fall on); and a real subprocess test that a
missing lectio source file fails the generator loudly, non-zero exit,
no output written -- the exact bug Task 1's own generator shipped and
needed a review round to fix.
dune test: exit 0, 856 tests. make check (COLITUR_EXHAUSTIVE_SWEEP=1,
full 1583-9999 sweep): exit 0, 862 tests, ~342s, both run unpiped in
the foreground. git diff --stat v1.0.0..HEAD -- lib/rites/rite_ef/
lib/kernel/ data/ef/ still empty.
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