@@ -0,0 +1,32 @@
+---
+'@objectstack/spec': minor
+'@objectstack/objectql': minor
+'@objectstack/metadata-core': minor
+---
+
+fix(spec,objectql)!: an installed or stored page carrying a declaration spec 18 retires converts at load instead of stopping the kernel build — `isDefault` off a bound record page is deleted and `template: 'full-width'` re-spelled `default`, each with a named notice; the authoring, save and publish doors keep refusing
+
+Clause-②: yes (widening)
+
+**What changes.** Protocol 18 refused `isDefault: true` on a page that is not a record page bound to an object, and closed the page `template` set (retiring `full-width`), at every door — the page parse (`definePage`, `defineStack`, so `os validate` / `os build`, and the metadata save door) and the kernel's package registration (`SchemaRegistry.installPackage` / `registerItem`, `MisplacedDefaultPageError`). The registration refusal also fired when a kernel was built from a package that was installed BEFORE the retirement: every hosted environment holding such a package failed its kernel build, with no remedy short of upgrading the package in each one. Data at rest now converts, and only data at rest:
+
+| Door | Before | Now |
+| :--- | :--- | :--- |
+| `definePage` / `defineStack` (`os validate`, `os build`), the metadata save door, package publish | refused at `isDefault` / `template` | **unchanged** — refused with the same sentence |
+| a `sys_metadata` page row read back | served with `_diagnostics.valid: false` | converted on read: the flag deleted, `full-width` → `default`, `OS_METADATA_CONVERTED` notice |
+| a compiled artifact inside the window its `engines.protocol` opens | the artifact door refused the artifact | converted before the strict parse, as every retired entry is |
+| a package body registered through `manifest.register` / `ObjectQL.registerApp` that declares `engines.protocol` (an installed package, a marketplace install) | `MisplacedDefaultPageError`, kernel build stopped | converted before anything registers, with one `warn` per (package, conversion) naming the conversion id and the first site; the body is left unchanged on disk |
+| the same body with NO declared range (a manifest a plugin builds in code), or declaring a floor newer than every retirement | refused | **unchanged** — refused |
+
+**The two ADR-0087 D2 entries**, both `retiredFromLoadPath` from the day they land (the authoring funnel never replays them):
+
+- `page-is-default-off-record-page-removed` (`page.isDefault`): deletes `isDefault: true` from exactly the pages `misplacedDefaultPageRefusal` refuses — a `home`, `app`, `utility` or `list` page, or a record page with no `object`. Lossless: nothing read the flag there (an app opens on its first navigation item). A default record page bound to an object keeps its flag.
+- `page-template-full-width-to-default` (`page.template`): `'full-width'` → `'default'`. Lossless: the console drew both names with one template component. An unregistered template name (`centered`, `two-column`) and a region the template does not place have no lossless rewrite and are NOT converted — they stay with the parse, and the D3 entries `page-is-default-off-record-page-refused` / `page-template-closed-region-unplaced-refused` name the hand edits.
+
+**`@objectstack/objectql`** — `ObjectQL.registerApp` (and the `manifest` service, for an artifact carrying `packages[]`) replays the versioned forward conversion (`applyArtifactForwardConversions`, `@objectstack/metadata-core`) over a package body that declares its protocol range, before `installPackage`; the converted copy is what the package record and every registered item carry. Public: `ObjectQL.convertPackageBodyForward(body)`.
+
+**`@objectstack/metadata-core`** — `applyArtifactForwardConversions` reads the declared range off a FLAT package body (the manifest half beside its collections, no `manifest` key) when the definition carries no `manifest`; a definition with a `manifest` object is read there, as before.
+
+Migration: none for authors — the authoring doors refuse exactly what they refused. An installed package converts again at every registration until it is rebuilt (`os build`) and re-published with tooling from a release that ships the retirement; the boot log's warn names the conversion and the site.
+
+<!-- adr-0087: registered page-is-default-off-record-page-removed, page-template-full-width-to-default -->
@@ -223,6 +223,30 @@ describe('applyArtifactForwardConversions — the versioned window (#12772)', ()
     expect(grant).not.toHaveProperty('allowRestore');
   });
 
+  it('reads a FLAT package body\'s range off the body itself — the shape `registerApp` and the marketplace ledger hold', () => {
+    // The same bytes as `legacyPermissionDefinition`, flattened the way
+    // `normalizeBundle` and a package body inside `packages[]` spell them: the
+    // manifest half beside the collections, no `manifest` key.
+    const nested = legacyPermissionDefinition('^17.1.0');
+    const { manifest, ...collections } = nested;
+    const flat = { ...manifest, ...collections };
+    const fromFlat = applyArtifactForwardConversions(flat, { runtimeSpecVersion: '17.2.0' });
+    const fromNested = applyArtifactForwardConversions(nested, { runtimeSpecVersion: '17.2.0' });
+    expect(fromFlat.verdict).toBe('converted-forward');
+    expect(fromFlat.authoredFloor).toBe('17.1.0');
+    expect([fromFlat.verdict, fromFlat.authoredFloor]).toEqual([fromNested.verdict, fromNested.authoredFloor]);
+    expect((fromFlat.definition as typeof flat).permissions[0]!.objects.crm_ticket).not.toHaveProperty('allowPurge');
+    // A flat body authored at a current-or-newer floor is NOT the undeclared
+    // amnesty: the strict parse stays its authority.
+    const current = applyArtifactForwardConversions({ ...flat, engines: { protocol: '>=99.0.0' } }, { runtimeSpecVersion: '17.2.0' });
+    expect(current.verdict).toBe('authored-current');
+    expect(current.authoredFloor).toBe('99.0.0');
+    // A `manifest` object, when present, is still the only place the range is read.
+    const both = applyArtifactForwardConversions({ ...nested, engines: { protocol: '>=99.0.0' } }, { runtimeSpecVersion: '17.2.0' });
+    expect(both.verdict).toBe('converted-forward');
+    expect(both.authoredFloor).toBe('17.1.0');
+  });
+
   it('closes the window when the runtime spec version cannot be resolved — amnesty needs positive version evidence', () => {
     const def = legacyPermissionDefinition('^17.1.0');
     const result = applyArtifactForwardConversions(def, { runtimeSpecVersion: null });
 
@@ -89,6 +89,9 @@
  *   the next release — so the change that re-legalizes a retired key decides
  *   that entry's fate at this door, where the default-flip refusal below
  *   ({@link DEFAULT_FLIPS_NOT_REPLAYED_HERE}) is the existing mechanism.
+ * - **A flat package body** — the manifest half beside the collections, with
+ *   no `manifest` key (the shape `registerApp` and the marketplace ledger
+ *   hold) — declares its range on itself, and the window is read there.
  * - **No declared range** → replay the full chain. Same posture as the
  *   protocol handshake (which grandfathers range-less packages with a warning,
  *   ADR-0087 "never false-reject") and as the stored-row pass (whose rows
@@ -498,11 +501,18 @@ export function applyArtifactForwardConversions<T>(
     return { definition, verdict: 'not-an-object', authoredFloor: null, runtimeSpecVersion, notices: [], replayedRetirements: [] };
   }
 
+  // WHERE the declared range is read from. A stack definition carries it on
+  // its `manifest`; a package BODY carries it on itself — the manifest half of
+  // `AssembledPackageBodySchema` sits beside the collections, which is the
+  // shape a flat `manifest.register` / `registerApp` payload and a marketplace
+  // ledger entry have, and the shape `packages[i].manifest` has inside an
+  // option-B artifact (ADR-0130 D4). A definition that carries a `manifest`
+  // object is read there and nowhere else, as before; only a definition with
+  // no `manifest` is read on its own keys, so a flat body's window is the
+  // body's own, versioned, instead of the undeclared amnesty.
   const manifest = (definition as { manifest?: unknown }).manifest;
-  const declared =
-    manifest && typeof manifest === 'object'
-      ? resolveDeclaredRange(manifest as ProtocolHandshakeManifest)
-      : null;
+  const rangeCarrier: unknown = manifest && typeof manifest === 'object' && !Array.isArray(manifest) ? manifest : definition;
+  const declared = resolveDeclaredRange(rangeCarrier as ProtocolHandshakeManifest);
   const floor = declared ? parseRangeFloor(declared.range) : null;
   const authoredFloor = floor ? floor.join('.') : null;