@@ -119,7 +119,10 @@ export const FIELD_KEY_STORAGE_CLASS: Readonly<Record<string, FieldKeyClass>> =
   visibleWhen: 'presentation',
   readonlyWhen: 'presentation',
   requiredWhen: 'presentation',
-  conditionalRequired: 'presentation',
+  // `conditionalRequired` (the pre-17 spelling of `requiredWhen`) was a row
+  // here while the spec carried its tombstone; the tombstone aged out of
+  // `FieldSchema` at spec 18.2 (objectstack#25767, ADR-0087 one major on), and
+  // the test beside this map refuses a classification the spec does not declare.
   dueLike: 'presentation',     // declares a date a deadline (#22227) — read by the renderer's date cells, never by `createColumn`: the column is the date the type already sizes
   settledWhen: 'presentation', // the deadline's settle predicate (#22227), display only like `visibleWhen` — no DDL reads it
   conditionalFormatting: 'presentation', // a field's cell formatting rules (#22228), display only — no DDL reads it
 
@@ -57,16 +57,27 @@ const ROOT_SCRIPTS = fileURLToPath(new URL('../../../scripts', import.meta.url))
 useSharedSandbox(ROOT_SCRIPTS);
 
 /** Retired keys whose ONLY registered clause names a DIFFERENT def — the defect. */
-const LEAF_COLLIDER_A = 'api/HttpFindQueryParams:distinct';
+const LEAF_COLLIDER_A = 'api/PackageInstallManifest:capabilities';
 
-/** …matched by this clause, which registers `data/Query`'s key, not this one. */
-const LEAF_COLLIDER_A_CLAUSE = 'data.query.distinct';
+/**
+ * …matched by this clause, which registers `kernel/Manifest`'s key, not this
+ * one: `PackageInstallManifestSchema` extends `ManifestSchema`, so the same
+ * tombstone sits on a second def with no row of its own. Re-picked at spec 18.2
+ * (#25767): the fixture was `api/HttpFindQueryParams:distinct` against
+ * `data.query.distinct` until that clause left with the 16.x conversions.
+ */
+const LEAF_COLLIDER_A_CLAUSE = 'manifest.capabilities';
 
-/** The issue's own `.type` shape: an index type dated by a flow node rename. */
-const LEAF_COLLIDER_B = 'data/Index:type';
+/**
+ * A book group's i18n block: a surviving tombstone (`book.zod.ts`, no row of
+ * its own) whose leaf a manifest retirement also spells. Re-picked at spec
+ * 18.2 (#25767) with A: the issue's own fixture, `data/Index:type` against
+ * `flow.node.type`, aged out with the 16.x tombstones.
+ */
+const LEAF_COLLIDER_B = 'system/BookGroup:translations';
 
-/** …registered at protocol 11 by `flow-node-http-callout-rename`. Unrelated. */
-const LEAF_COLLIDER_B_CLAUSE = 'flow.node.type';
+/** …registered by `plugin-manifest-contributes-dead-members-retired` for the manifest's `contributes` block. Unrelated. */
+const LEAF_COLLIDER_B_CLAUSE = 'manifest.contributes.translations';
 
 /** A key no build emits: the aged-out steady state a stale entry decays into. */
 const AGED_OUT_KEY = 'data/Object:zzAgedOutTombstone4659';
@@ -242,7 +253,7 @@ describe('build-schemas.ts — check (b) matches the exact retired key, not its
     'registering one key registers exactly that key — its neighbour with the same leaf still fails',
     { timeout: SPAWN_TIMEOUT_MS },
     () => {
-      // `data.query.distinct` covered A only by leaf; now even a REAL entry for
+      // `manifest.capabilities` covered A only by leaf; now even a REAL entry for
       // B cannot cover A. This is the whole change in one run: membership is per
       // key, and nothing radiates from one registration to another.
       seedRetiredKeys({ [CURRENT_MAJOR]: [LEAF_COLLIDER_B] });
 
@@ -296,6 +296,10 @@ describe('tree-scoped absence: nothing inside the declared radius still authors
   const EXCLUDED = new Set([
     // This pin authors the key to assert its refusal and its conversion.
     THIS_FILE,
+    // The CLI write door's pin (#25767): its fixture authors the pre-retirement
+    // agent on purpose, to assert `os migrate meta --from 17 --write` rewrites
+    // it through this kit's D2 conversion — the kit's fixture at the CLI door.
+    'packages/cli/test/migrate-meta-write.test.ts',
   ]);
   const EXCLUDED_PREFIXES = [
     // The D2 conversion's fixture authors the pre-retirement agent on purpose.
 
@@ -357,6 +357,12 @@ describe('tree-scoped absence: nothing inside the declared radius still authors
     'packages/lint/src/runtime-gate.datasource-writes.test.ts',
     'packages/lint/src/runtime-gate.inert-type-writes.test.ts',
     'packages/cli/test/i18n-flow-liveness-gate.test.ts',
+    // The CLI write door's pin and the chain's own replay pin (#25767): each
+    // authors the pre-retirement object on purpose, to assert the D2
+    // conversion strips the key at `--from 17` — this kit's fixtures at the
+    // two doors that replay it.
+    'packages/cli/test/migrate-meta-write.test.ts',
+    'packages/spec/src/migrations/migrations.test.ts',
   ]);
   const EXCLUDED_PREFIXES = [
     // The D2 conversion's fixture authors the pre-retirement object on purpose.
 
@@ -289,10 +289,13 @@ describe('connector sync retirement — ADR-0087 registration', () => {
     ]) {
       expect(RETIRED_DEFS_BY_MAJOR[18], `${def} must be declared`).toContain(def);
     }
-    // The earlier `transform` retirement's key-grain row stays: its def left
-    // whole, which is the steady state gate (b3) exempts — deleting the row
-    // would erase the record that the key was ever retired.
-    expect(RETIRED_KEYS_BY_MAJOR[17]).toContain('integration/ConnectorFieldMapping:transform');
+    // The earlier `transform` retirement (17.0.0) was a key-grain row under
+    // major 17. That whole table aged out at 18.2 (objectstack#25767, ADR-0087
+    // amended 2026-10-26: a row lives one major past its tombstone, and the
+    // record that the key was ever retired is the previous major's release
+    // tag, not this registry). The row must not come back by itself.
+    expect(RETIRED_KEYS_BY_MAJOR[17]).toBeUndefined();
+    expect(Object.values(RETIRED_KEYS_BY_MAJOR).flat()).not.toContain('integration/ConnectorFieldMapping:transform');
   });
 
   it('wires the D2 conversion into the step-18 chain as a retired, stamped, lossless strip', () => {
 
@@ -275,8 +275,10 @@ describe('page:header breadcrumb retirement — the ADR-0087 ledger row', () =>
   it('declares ONE key under major 18', () => {
     expect(RETIRED_KEYS_BY_MAJOR[18]).toContain(REGISTERED_KEY);
     const all = Object.values(RETIRED_KEYS_BY_MAJOR).flat();
+    // `ui/PageHeaderProps:icon` (17.0.0) stood first in this list until spec
+    // 18.2: the major-17 table aged out one major on (objectstack#25767,
+    // ADR-0087), so the row's surviving keys are the two 18 rows.
     expect(all.filter((k) => k.startsWith('ui/PageHeaderProps:'))).toEqual([
-      'ui/PageHeaderProps:icon',
       REGISTERED_KEY,
       // #23650 retired the row's third key the same way.
       'ui/PageHeaderProps:showStar',
 
@@ -278,12 +278,14 @@ describe('page:header showStar retirement — the D2 conversion', () => {
 });
 
 describe('page:header showStar retirement — the ADR-0087 ledger row', () => {
-  it('declares ONE key under major 18, beside the two this row lost before it', () => {
+  it('declares ONE key under major 18, beside the one this row lost before it', () => {
     expect(RETIRED_KEYS_BY_MAJOR[18]).toContain(REGISTERED_KEY);
     const all = Object.values(RETIRED_KEYS_BY_MAJOR).flat();
+    // `ui/PageHeaderProps:icon` (17.0.0) was the third key here until spec
+    // 18.2: the major-17 table aged out one major on (objectstack#25767,
+    // ADR-0087), leaving the two 18 rows.
     expect(all.filter((k) => k.startsWith('ui/PageHeaderProps:')).sort()).toEqual([
       'ui/PageHeaderProps:breadcrumb',
-      'ui/PageHeaderProps:icon',
       REGISTERED_KEY,
     ]);
   });
 
@@ -308,6 +308,10 @@ describe('tree-scoped absence: no ViewItem record or flattened overlay inside th
     'packages/spec/src/ui/view-overlay-owner-hidden-retirement.test.ts',
     // This pin names the keys to assert their absence.
     THIS_FILE,
+    // [#25767] The view union's prescription pin authors `owner` on a view
+    // record on purpose, to assert the branch-typed refusal names this kit's
+    // prescription.
+    'packages/spec/src/ui/view-union-retirement-prescription.test.ts',
   ]);
   const EXCLUDED_PREFIXES = [
     // The D2 conversion's fixture authors the pre-retirement record on purpose.
 
@@ -361,6 +361,13 @@ describe('tree-scoped absence: no list-view payload inside the declared radius s
     // The `os lint` twin of that pin: `os lint` never parses, so the lint
     // rule reports the key by name, and this file authors it to assert that.
     'packages/lint/src/list-view-filterable-fields-retired.test.ts',
+    // [#25767] The view union's prescription pin authors the key at the
+    // container and overlay doors to assert the branch-typed refusal names this
+    // kit's prescription, and the liveness advisory's witnesses author it on an
+    // UNPARSED intake to prove the ledger's `dead` verdict still warns there —
+    // both took this key over from `striped` when its 16.x tombstone aged out.
+    'packages/spec/src/ui/view-union-retirement-prescription.test.ts',
+    'packages/lint/src/lint-liveness-properties.test.ts',
   ]);
   const EXCLUDED_PREFIXES = [
     // The D2 conversion's fixture authors the pre-retirement payload on purpose.
 
@@ -250,6 +250,9 @@ describe('tree-scoped absence: nothing inside the declared radius still authors
     'packages/spec/src/ui/component.test.ts',
     // The view write door's generic moved-key projection, modelled on the old fold.
     'packages/metadata-protocol/src/protocol.project-storable-view-body.test.ts',
+    // [#25767] The view union's prescription pin authors `visibleOn` on a form
+    // overlay to assert the branch-typed refusal names the alias prescription.
+    'packages/spec/src/ui/view-union-retirement-prescription.test.ts',
   ]);
   const EXCLUDED_PREFIXES = [
     // The D2 conversions' fixtures and the stored-row replay pins author the pre-18 shapes on purpose.