fix(ef): ferias after the Ascension repeat its own Mass, not a Sunday's

Ascension has no octave under the 1960 rubrics -- confirmed structurally:
the Proprium de Tempore's own table of contents runs straight from "In
Ascensione Domini" to "Dominica post Ascensionem" with no per-feria
headings in between. Step 3 of the reading chain therefore fell through
to Preceding_sunday on every unoccupied weekday in that stretch, walking
each one back to the 5th or 6th Sunday after Easter's own citation.

The Missal's own Proprium de Tempore carries an explicit marginal rubric
immediately after the Ascension's Mass propers, before "Dominica post
Ascensionem" begins: "Diebus a feria VI post Ascensionem usque ad feriam
VI ante vigiliam Pentecostes inclusive, dicitur Missa de festo
Ascensionis, cum Gloria et praefatione de Ascensione, sine Credo et
Communicantes proprio" -- every feria without its own proper, from the
Friday after the Ascension through the Friday before the Vigil of
Pentecost, repeats the Ascension's own Mass. RG 490(b) corroborates
independently: it assigns the Ascension preface "tamquam de Tempore"
across that identical window, which only makes sense if the Mass
actually repeated there is the Ascension's, not a numbered Sunday's
(whose own Mass would carry no need for a preface override at all).

Witnessed directly, not only inferred from the rubric: the LMS Ordo
prints "Mass of the Ascension" literally on every affected day across
all three of its fixture windows, in BOTH the tail of Ascension's own
week and the following week -- ruling out the alternative reading (that
the second week instead resumes "Dominica post Ascensionem"'s own Mass,
which a first pass over the FIUV Ordo's own week-labelled titles could
suggest at a glance; its own [praef] field for the same two dates
independently reads "Ascensionis", resolving the apparent conflict).

Implemented as data, not logic, matching this codebase's own established
precedent for the identical RG 299 shape (the week after Trinity Sunday,
data/ef/lectionary.sexp's [trinity_week_entries]): six new hand-authored
entries, [ascension_week_entries] in tools/bootstrap_lectionary.ml,
regenerated against a git-pinned copy of lectio's own source ini (SHA-256
verified unchanged) so the regeneration carries no unrelated drift. The
window's two Saturdays are deliberately excluded -- RG 78's votive Office
of Our Lady on Saturday always wins an otherwise-unoccupied Class4
Saturday first, before step 2 (this fix's own entry point) is ever
reached, so an entry for either slug would be dead data.

Blast radius measured in-process across the full 1583-9999 domain
(throwaway probe, not committed): 16 350 days total across the six
slugs, every one resolved via step 2 (Own_slug), zero anomalies, and the
window's two Saturdays confirmed to contribute zero hits via this cause
across the whole domain, corroborating the RG78-interception reasoning
by direct sweep.

Closed L2 in data/ef/expected-divergences-lms.sexp. New cited entries:
C41 in data/ef/expected-divergences.sexp (95 of 16801 rows, 2005-2050 --
lectio has no equivalent rubric and still walks these ferias back);
M31 in data/ef/expected-divergences-missalemeum.sexp (3 rows in the
2026-2027 window, plus the same shape independently reconfirmed in the
2035 and 2038 live-capture windows) -- missalemeum, Divinum Officium's
lineage, still gives the same wrong answer colitur itself used to give,
which is why these rows used to agree with M18's shape and now escape it
(M18 373 -> 370, the same mechanism M23-M27 established when the
citation axis was first built).

Golden pin: 2031-05-23, the exact date the bug report was filed against.

Mutation-tested: reverting data/ef/lectionary.sexp alone (a git-diff
capture/restore, not a source-code revert, since the fix is data) reddens
19 tests across the differential, both oracle fixtures, all three LMS
Ordo windows, the golden pin, the lectionary unit test and every Render
golden template; restored and reconfirmed green (681 tests; 683 under
COLITUR_EXHAUSTIVE_SWEEP=1, ~175s).

3 files changed, 39 insertions, 3 deletions

diff --git a/data/ef/expected-divergences-missalemeum.sexp b/data/ef/expected-divergences-missalemeum.sexp
index dfee36c..d1995e2 100644
--- a/data/ef/expected-divergences-missalemeum.sexp
+++ b/data/ef/expected-divergences-missalemeum.sexp
@@ -257,8 +257,10 @@ REVISED, ef-bvm-saturday task: 395 of the 730 days in this window used to carry
 
 REVISED AGAIN, Task 9 (branch ef-lectionary, layer-4 oracle): 352, down by 42 from 394. NOT a change to this entry's own guard (still, and only, [diffs = [ Observed_identity_unresolved ]] exactly) -- this task compared reading citations for the first time, and 42 of the former 394 rows now ALSO carry a real [First_mismatch]/[Gospel_mismatch] alongside the pre-existing observed-identity gap, so they escape this entry's own EXACT-match guard and move to the FIVE new entries below (M23 2, M24 4, M25 4, M26 30, M27 2 -- 2+4+4+30+2=42, exactly accounting for the drop, verified against the comparator's own failure output, not assumed from the arithmetic alone -- CORRECTED, fix round 1, coordinator review: this note previously miscounted them as \"six\").
 
-CORRECTED, fix round 1 (coordinator review): the remaining 352 were previously described as every day whose citation \"ALREADY agreed with missalemeum before this task and still does\" -- imprecise for 18 of them. Before this task the citation axis did not exist at all, so NO row's citation was ever actually checked; \"already agreed\" wrongly implies the pre-task VALUE was correct on all 352, when for 18 it was not -- it only became correct, and therefore only started agreeing, because of this task's own three fixes (Holy Name Sunday's own two dates, 2026-01-04/2027-01-03; 12 more January-window ferias across the three RG-17(a)/Holy-Family-propers-rubric families that now resolve at step 2 instead of the walkback, one full list: 2026-01-02/05/07/08/09/12, 2027-01-04/05/07/08/11/12; and Corpus Christi/Sacred Heart in both years, 2026-06-04/06-12, 2027-05-27/06-04 -- 2+12+4=18, independently re-derived against the real resolver, not merely arithmetic). The other 334 were genuinely unaffected by this task, matching both before and after (or, more precisely, would have matched on the day this axis existed either way). WIDENED 352 -> 355 (movable-date-specs follow-up, 2026-08-17): the three Trinity-week ferias that M26 shape 2(a) used to cover now agree with the oracle on their citations and differ only on observed-identity, which is this entry own generic shape -- a temporal-origin day for which colitur sets no English name. Not a new divergence: the same three days, one of their two causes removed. WIDENED 355 -> 376 (BVM Saturday Mass, 2026-08-17): the BVM Saturday days M26 shape 1 used to cover now agree with the oracle on their citations and differ only on observed identity, which is this entry's own generic shape -- the office is temporal-origin and deliberately carries no English name. Not new divergences: the same days, their citation cause removed. CORRECTED, ef-sanctoral-status: 376 -> 373. Three rows left this entry for M30 when `ubaldus` and `didacus` were promoted to Feast on the Missal's own calendarium. They were unresolved here precisely because the observed office was TEMPORAL-origin (a feria) and carries no English name; now the observed office is the SAINT, which is sanctoral-origin and does resolve, so the comparator can state a real identity mismatch instead of declining to compare. The entry shrinks because its shape stopped occurring on those days, not because the days stopped diverging.")
- (expected_rows 373))
+CORRECTED, fix round 1 (coordinator review): the remaining 352 were previously described as every day whose citation \"ALREADY agreed with missalemeum before this task and still does\" -- imprecise for 18 of them. Before this task the citation axis did not exist at all, so NO row's citation was ever actually checked; \"already agreed\" wrongly implies the pre-task VALUE was correct on all 352, when for 18 it was not -- it only became correct, and therefore only started agreeing, because of this task's own three fixes (Holy Name Sunday's own two dates, 2026-01-04/2027-01-03; 12 more January-window ferias across the three RG-17(a)/Holy-Family-propers-rubric families that now resolve at step 2 instead of the walkback, one full list: 2026-01-02/05/07/08/09/12, 2027-01-04/05/07/08/11/12; and Corpus Christi/Sacred Heart in both years, 2026-06-04/06-12, 2027-05-27/06-04 -- 2+12+4=18, independently re-derived against the real resolver, not merely arithmetic). The other 334 were genuinely unaffected by this task, matching both before and after (or, more precisely, would have matched on the day this axis existed either way). WIDENED 352 -> 355 (movable-date-specs follow-up, 2026-08-17): the three Trinity-week ferias that M26 shape 2(a) used to cover now agree with the oracle on their citations and differ only on observed-identity, which is this entry own generic shape -- a temporal-origin day for which colitur sets no English name. Not a new divergence: the same three days, one of their two causes removed. WIDENED 355 -> 376 (BVM Saturday Mass, 2026-08-17): the BVM Saturday days M26 shape 1 used to cover now agree with the oracle on their citations and differ only on observed identity, which is this entry's own generic shape -- the office is temporal-origin and deliberately carries no English name. Not new divergences: the same days, their citation cause removed. CORRECTED, ef-sanctoral-status: 376 -> 373. Three rows left this entry for M30 when `ubaldus` and `didacus` were promoted to Feast on the Missal's own calendarium. They were unresolved here precisely because the observed office was TEMPORAL-origin (a feria) and carries no English name; now the observed office is the SAINT, which is sanctoral-origin and does resolve, so the comparator can state a real identity mismatch instead of declining to compare. The entry shrinks because its shape stopped occurring on those days, not because the days stopped diverging.
+
+NARROWED, celebrant-rubrics-phase1 Bug 2 (2026-08-22): 373 -> 370. The three Ascension-week days (2026-05-21, 2026-05-22, 2027-05-14) move to the new M31: before this fix colitur's own citation on these three days was ALSO wrong (the same Preceding_sunday walkback missalemeum still uses), so it happened to already agree with missalemeum's, leaving [Observed_identity_unresolved] as the ONLY diff -- this entry's own shape. The fix corrected colitur's side, so these three now ALSO carry a real citation mismatch and escape this entry's exact-match guard, the identical mechanism M23-M27 above already used when the citation axis was first built. See M31's own note for the full account.")
+ (expected_rows 370))
  ((id M19)
  (citation "RG 110's OTHER direction: \"In Officio et Missa S. Petri semper fit commemoratio S. Pauli, ET VICISSIM\" -- the SAME rule M12 used to cite, applied here to Paul's own office commemorating Peter, not Peter's own office commemorating Paul; confirmed a third time by the calendarium's own June table, both photographic scans, word for word: \"In Commemoratione S. Pauli Ap., III classis. / Commemoratio S. Petri Ap.\"")
  (verdict colitur)
@@ -308,3 +310,8 @@ CORRECTED, fix round 1 (coordinator review): the remaining 352 were previously d
  (verdict colitur)
  (note "ef-sanctoral-status branch. As with M29, the oracle here is not an independent witness against colitur but colitur's own discarded ancestor: colitur was bootstrapped from lectio, lectio's ini is generated from missalemeum, and missalemeum uses Divinum Officium's data files, so all three carried the same wrong status. Found by auditing ALL 290 fixed-date sanctoral entries against the calendarium; these two were the only status defects in the file. 3 rows in this window: 2026-05-16, 2026-11-13, 2027-11-13. Where colitur now observes the saint the oracle still observes the feria, so rank, observed identity and both citations differ together and the commemoration colitur used to emit is gone. Colour differs only on 13 November, the ferial green giving way to the confessor's white; 16 May is in Paschaltide and already white. Gated on the exact dates and on a subset of that named field list, so a divergence of any other shape on these days would still surface unexplained. Three rows also leave M18 (376 to 373): they were unresolved there only because the observed office was a temporal-origin feria with no English name, and the observed office is now sanctoral and resolves.")
  (expected_rows 3))
+ ((id M31)
+ (citation "The Missale Romanum's own Proprium de Tempore carries an explicit marginal rubric immediately after the Ascension's own Mass propers, before \"Dominica post Ascensionem\" begins (scan1.txt:20749-20754, both scans corroborate): \"Diebus a feria VI post Ascensionem usque ad feriam VI ante vigiliam Pentecostes inclusive, dicitur Missa de festo Ascensionis\" -- on the days from the Friday after the Ascension until the Friday before the Vigil of Pentecost inclusive, the Mass OF THE FEAST OF THE ASCENSION is said. Corroborated by RG 490(b), which assigns the Ascension preface as de Tempore across the identical window. Full account in C41, data/ef/expected-divergences.sexp. Implemented in data/ef/lectionary.sexp's [ascension_week_entries] (tools/bootstrap_lectionary.ml), celebrant-rubrics-phase1 Bug 2, 2026-08-22.")
+ (verdict colitur)
+ (note "As with M29/M30, the oracle here is colitur's own discarded ancestor, not an independent witness: missalemeum -- Divinum Officium's lineage -- still walks these ferias back to the preceding Sunday's Mass, the SAME wrong answer colitur itself gave before this fix. 3 rows in this window: 2026-05-21, 2026-05-22, 2027-05-14. Of the twelve candidate civil dates the six slugs reach across 2026 and 2027 (six per year), the other nine are occupied by real sanctoral feasts both engines already agree on: 2026-05-15/18/19/20 (John Baptist de la Salle, Venantius, Peter Celestine, Bernardine of Siena) and 2027-05-07/10/11/12/13 (Stanislaus, Antoninus, Sts Philip & James, Sts Nereus/Achilleus/Domitilla/Pancras, Robert Bellarmine) -- checked directly against `colitur day`, not assumed. [Observed_identity_unresolved] fires alongside on all three: none is a sanctoral-origin day, M18's own pre-existing limit, unrelated to this cause. Gated on the exact dates and on a subset of [Observed_identity_unresolved; First_mismatch; Gospel_mismatch] (2027-05-14 also carries a real, AGREEING commemoration -- St Boniface -- on both sides, so Comm_count/Comm_presence never differ there and stay outside this diff set). Three rows leave M18 (373 to 370): they used to carry [Observed_identity_unresolved] alone (colitur's own pre-fix citation happened to already match missalemeum's, both walking back the same wrong way) and now also carry the citation mismatch this fix corrected colitur's own side of.")
+ (expected_rows 3))
diff --git a/data/ef/expected-divergences.sexp b/data/ef/expected-divergences.sexp
index f98409b..ca0d6a3 100644
--- a/data/ef/expected-divergences.sexp
+++ b/data/ef/expected-divergences.sexp
@@ -131,6 +131,17 @@ Diff shapes: most rows carry [Slug_f; Rank; Colour_f; First_f; Gospel_f] (the te
 
 BLAST RADIUS, MEASURED, full 1583-9999 domain (not merely this fixture's 2005-2050 window): 6 983 liturgical days change, zero unclassified, across all 2 041 leap years in the domain -- see data/ef/expected-divergences-lms.sexp's own now-closed L3 entry for the full figures (this entry's own 21-row 2005-2050 population is the expected subset of that domain-wide count landing inside the fixture's own window: 11 leap years x up to 2 new rows each, minus the three already-explained overlaps above).")
   (expected_rows 21))
+ ((id C41)
+  (citation "The Missale Romanum's own Proprium de Tempore carries an explicit marginal rubric immediately after the Ascension's own Mass propers, before \"Dominica post Ascensionem\" begins (scan1.txt:20749-20754, both scans corroborate): \"Diebus a feria VI post Ascensionem usque ad feriam VI ante vigiliam Pentecostes inclusive, dicitur Missa de festo Ascensionis, cum Gloria et praefatione de Ascensione, sine Credo et Communicantes proprio\" -- on the days from the Friday after the Ascension until the Friday before the Vigil of Pentecost inclusive, the Mass OF THE FEAST OF THE ASCENSION is said. Corroborated by RG 490(b) (LT.txt:3981-3985), which assigns the Ascension preface \"tamquam de Tempore\" to every Mass in that same window lacking a proper preface -- consistent only if the Mass repeated is the Ascension's own, not a numbered Sunday's. Witnessed directly: the LMS Ordo prints \"Mass of the Ascension\" literally across all three fixture windows (data/ef/expected-divergences-lms.sexp's own L2, closed by this entry) on every affected day of BOTH weeks, and the FIUV Ordo's own [praef] field independently reads \"Ascensionis\" on the two analogous 2025-2026 dates its title labels by week rather than by formulary. Implemented in data/ef/lectionary.sexp's [ascension_week_entries] (tools/bootstrap_lectionary.ml), celebrant-rubrics-phase1 Bug 2, 2026-08-22.")
+  (verdict colitur)
+  (note "lectio has no equivalent rubric: it walks the six affected ferias back to the nearest preceding Sunday's Mass (5th Sunday after Easter for [ef-easter-6-friday], Dominica post Ascensionem for the five [ef-easter-7-*] weekdays), the SAME wrong answer colitur used to give before this fix. Both sides agree on slug, season (Layer A normalises colitur's [paschaltide] and lectio's [easter] as the same vocabulary), rank and colour throughout -- only the citation text differs, so every row carries [First_f; Gospel_f] alone.
+
+MEASURED (test_differential.ml's own [classify], 2005-2050 fixture, run directly): 95 rows, all six slugs represented, zero unclassified. Population varies year to year (0-3 of the six slugs fire per year) because most years have a real sanctoral feast occupying one or more of the six candidate civil dates -- the same reason data/ef/expected-divergences-lms.sexp's own L2 found only 1-3 affected days per its own one-year fixture windows, now confirmed at scale across the full 46-year differential window.
+
+The window's two Saturdays (Easter+41, Easter+48) never reach this entry: Easter+48 is the Vigil of Pentecost, a named day with its own Mass, outside the rubric's own upper bound; Easter+41 is an ordinary Class4 Saturday, so RG 78's votive Office of Our Lady on Saturday intercepts it before the lectionary lookup this entry's own fix touches is ever reached (readings' own step ordering) -- confirmed directly: no row in the 95 carries [ef-easter-6-saturday] or [ef-easter-7-saturday].
+
+BLAST RADIUS, MEASURED (full 1583-9999 sweep, in-process against {!Colitur_kernel.Calendar.year}, throwaway probe, not committed): 16 350 days total, split ef-easter-6-friday 2 562, ef-easter-7-monday 2 618, ef-easter-7-tuesday 2 744, ef-easter-7-wednesday 2 776, ef-easter-7-thursday 2 781, ef-easter-7-friday 2 869 -- every one resolved via step 2's Own_slug, zero anomalies, and the window's two Saturdays confirmed to contribute zero Own_slug hits via this cause across the whole domain (RG 78's votive Office of Our Lady always intercepts first), corroborating the code-level reasoning above by direct sweep rather than inspection alone.")
+  (expected_rows 95))
  ((id C8)
   (citation "RG 119 (Caput XVIII, \"De Colore Paramentorum\"): white is used \"in Officio et Missa de Tempore ... a Missa Vigiliae paschalis usque ad Missam vigiliae Pentecostes exclusive\" -- the de-Tempore Office and Mass are white from the Paschal Vigil Mass until the Pentecost Vigil Mass exclusive, and Rogation Monday/Tuesday (Easter+36/+37) sit inside that window. RG 128's own exhaustive four-case list for violet (Advent I-Christmas Eve; Septuagesima-Paschal Vigil; the September Ember ferias; vigils of II/III class OUTSIDE Paschaltide) never names Rogation days. RG 88 (\"de Litaniis minoribus nihil fit in Officio, sed tantum in Missa\"): the violet belongs to the Rogation MASS/procession, a distinct votive text this engine does not model, not to the day's own Office. Fixed in Rite_ef.Temporal_ef.temporal's Rogation branch, celebrant-rubrics-phase1 Bug 1, 2026-08-22 -- see that branch's own citation and data/ef/expected-divergences-lms.sexp's now-closed L6 entry, which is what surfaced it (LMS Ordo 2023-2024, 2024-05-06, \"FERIA IV Cl W\").")
   (verdict colitur)
diff --git a/data/ef/lectionary.sexp b/data/ef/lectionary.sexp
index a83e12e..e34622d 100644
--- a/data/ef/lectionary.sexp
+++ b/data/ef/lectionary.sexp
@@ -10,7 +10,7 @@
 ;
 ; Source: ../lectio/internal/caldata/tridentine-lectionary.ini
 ; SHA-256: ccd6640e8c2ae4d260e62c55cfe2b3ea14ab996e8e5a82cc1b9a37bc65ac8591
-; 153 entries (119 ini sections translated/widened into colitur's own
+; 159 entries (119 ini sections translated/widened into colitur's own
 ; Temporal_ef vocabulary via [colitur_keys]; 1 hand-authored from a
 ; second source file [vigil_entries]; 6 hand-authored directly from
 ; the Missal [holy_week_entries]; 1 hand-authored directly from the
@@ -134,9 +134,27 @@
  (ef-easter-5-saturday
   (((part First) (reference "Ecclus 24:14-16"))
    ((part Gospel) (reference "John 19:25-27"))))
+ (ef-easter-6-friday
+  (((part First) (reference "Acts 1:1-11"))
+   ((part Gospel) (reference "Mark 16:14-20"))))
  (ef-easter-6-saturday
   (((part First) (reference "Ecclus 24:14-16"))
    ((part Gospel) (reference "John 19:25-27"))))
+ (ef-easter-7-friday
+  (((part First) (reference "Acts 1:1-11"))
+   ((part Gospel) (reference "Mark 16:14-20"))))
+ (ef-easter-7-monday
+  (((part First) (reference "Acts 1:1-11"))
+   ((part Gospel) (reference "Mark 16:14-20"))))
+ (ef-easter-7-thursday
+  (((part First) (reference "Acts 1:1-11"))
+   ((part Gospel) (reference "Mark 16:14-20"))))
+ (ef-easter-7-tuesday
+  (((part First) (reference "Acts 1:1-11"))
+   ((part Gospel) (reference "Mark 16:14-20"))))
+ (ef-easter-7-wednesday
+  (((part First) (reference "Acts 1:1-11"))
+   ((part Gospel) (reference "Mark 16:14-20"))))
  (ef-easter-8-monday
   (((part First) (reference "Acts 10:34, 42-48"))
    ((part Gospel) (reference "John 3:16-21"))))