Fix privileged-feria-major: nothing is ever commemorated, any rank

The Easter octave cascade built last commit reused the existing
"duplex-majus+ still gets a bare commemoration" branch unchanged,
trusting its own citation (St. Mark within the Easter Octave). That
citation was a misreading. Live-verified: the Annunciation (Duplex I.
classis) transfers with zero commemoration on Holy Thursday itself, and
Chair of St. Peter at Antioch does the same on Ash Wednesday - the
exception was wrong everywhere this category is used, not just Holy
Week. privileged-feria-major now matches privileged-sunday exactly:
unconditional transfer, no exceptions, any rank.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017XMSokiTD2Qc5vPP2YQu3Q

src/calendar/commemorations.ts

@@ -143,11 +143,22 @@ export function decideOccurrence(
       };
 
     case 'privileged-feria-major':
-      // Ash Wednesday, Holy Week, the Easter Octave, the Vigil of
-      // Christmas — never displaced, same as privileged-sunday.
-      if (isAtLeast(sanctoral.rank, 'duplex-majus')) {
-        return { winner: temporalWinner, commemorations: [sanctoralCommemoration(sanctoral)] };
-      }
+      // Ash Wednesday, Holy Week, the Easter Octave, Low Sunday, the
+      // Vigils of Christmas/Pentecost — never displaced, and never gives
+      // even a bare commemoration to any rank, same as privileged-sunday.
+      // The "duplex-majus+ still gets a nod" branch this case used to
+      // have was wrong, not just unverified: the one case that seemed to
+      // support it (St. Mark, Duplex II. classis, "merely commemorated"
+      // within the Easter Octave) turns out to have been a misreading —
+      // live-verified 2026-09-01, direct instruction ("you dont
+      // commemorate -anything- from palm sunday through low sunday"),
+      // confirmed with two more dates on top of the Annunciation/Palm-
+      // Easter-Sunday evidence already in the privileged-sunday case
+      // below: the Annunciation (Duplex I. classis) transfers with zero
+      // commemoration on Holy Thursday itself in years it lands there
+      // (2027/2032/2043), and Chair of St. Peter at Antioch (Duplex
+      // majus) transfers off Ash Wednesday the same way (2034) — so the
+      // exception was wrong for Ash Wednesday too, not just Holy Week.
       return {
         winner: temporalWinner,
         commemorations: [],

src/calendar/types.ts

@@ -76,12 +76,16 @@ export type FeastClass =
 // 1617 engine, which the original single-tier model wrongly forbade) —
 // see calendar/commemorations.ts's rules for `privileged-feria` (behaves
 // like `ordinary-sunday`: Duplex+ wins outright) vs `privileged-feria-major`
-// (behaves like `privileged-sunday`: never displaced at all, confirmed by
-// checking St. Mark, Duplex II. classis, merely commemorated rather than
-// winning within the Easter Octave). See data/calendar/temporal-
-// categories.yml for exactly which days fall in which tier — some of that
-// split (e.g. whether Pentecost's own Ember days share Lent's lesser tier
-// or Easter's major one) is still a reconstructed guess, not verified.
+// (behaves like `privileged-sunday`: never displaced, and — corrected
+// 2026-09-01 — never gets even a bare commemoration at any rank either;
+// an earlier claim that a duplex-majus+ candidate is "merely commemorated"
+// there, citing St. Mark within the Easter Octave, turned out to be a
+// misreading — direct instruction confirmed nothing is ever commemorated
+// anywhere from Palm Sunday through Low Sunday, and live-checking Ash
+// Wednesday found the same). See data/calendar/temporal-categories.yml
+// for exactly which days fall in which tier — some of that split (e.g.
+// whether Pentecost's own Ember days share Lent's lesser tier or
+// Easter's major one) is still a reconstructed guess, not verified.
 // `privileged-feria-minor` is a third, weaker tier, added during the
 // December sanctoral pull after finding Advent's own ordinary (non-Ember)
 // ferias have real standing of their own in the live engine — a Simplex