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diff --git a/‎packages/objectql/src/engine-security-catalog-package-door.test.ts‎
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@@ -7,7 +7,7 @@ feat(core): one by-name read of the security catalog (`createSecurityCatalogRead
 Clause-②: yes (widening)
 
 - **What is new.** `createSecurityCatalogReader({ registry, metadata })` returns a reader with two members: `resolve(type, name)`, the definition a position, permission set or capability name resolves to (or `undefined`), and `list(type)`, one entry per name. `type` is `'position' | 'permission' | 'capability'`. Each entry is `{ type, name, definition, source, packageId? }`. The types `SecurityCatalogType`, `SecurityCatalogSourceName`, `SecurityCatalogRegistry`, `SecurityCatalogMetadataService`, `SecurityCatalogSources`, `SecurityCatalogEntry` and `SecurityCatalogReader` are exported with it.
-- **Where it reads.** ObjectQL's `SchemaRegistry` (`engine.registry`) first, then the kernel `metadata` service for the names the registry does not hold. Neither holds the whole catalog: the engine registry carries the platform's own permission sets and every package manifest's catalog items but no stack-declared position, and the metadata service carries the stack-declared positions but not the platform's permission sets. Both are required; construction refuses a missing one.
+- **Where it reads.** ObjectQL's `SchemaRegistry` (`engine.registry`) first, then the kernel `metadata` service for the names the registry does not hold. Neither holds the whole catalog: the engine registry carries the platform's own permission sets and every package manifest's catalog items, stack-declared positions included, and the metadata service carries the security collections an app registers in memory but not the platform's permission sets. Both are required; construction refuses a missing one.
 - **A name two packages ship** resolves the way the registry's by-name read does today: a stored override first, else the first-registered package's body.
 - **What it does not answer.** Whether an item is in effect: the row `active` flag stays the authority, and no definition carries it. The position → permission-set binding. Organization scope: the catalog is environment-level.
 - **Failures are loud.** A reader that throws, or a metadata read that lost a loader and found nothing, raises `AuthzStoreUnavailableError` (`SERVICE_UNAVAILABLE`, 503) instead of answering "no such item". A definition owned by a disabled package answers neither member.
 
@@ -0,0 +1,13 @@
+---
+"@objectstack/objectql": patch
+---
+
+fix(objectql): a stack-declared position is registered under its package, so the metadata save door refuses a save over it like every other non-overridable security type
+
+Clause-②: no
+
+- **What was wrong.** `PUT /api/v1/meta/position/NAME` naming a position an installed package declares answered `200`, and the saved environment row then won the by-name read (`GET /api/v1/meta/position/NAME`). The type registry declares `position` `allowOrgOverride: false`, as it declares `permission` and `capability`, so the save door should refuse it.
+- **Why.** The save door decides "a code package ships this item" from the engine's SchemaRegistry entry that a package registered. `ObjectQL.registerApp()` puts a stack collection into that registry under its package only for the collections it enumerates. That list carried `permissions` and `capabilities`, but still carried the retired `roles` instead of `positions`. So no package-declared position had an entry, and the save took the runtime-create path.
+- **What changes.** `registerApp()` (and the nested-plugin seam) now registers a stack's `positions` under the owning package, with the same ADR-0010 provenance as its permission sets. A save over a package-declared position is refused `403 NOT_OVERRIDABLE` on every topology. A save that names the read-only package (`?package=`) is refused `403 ITEM_LOCKED`, which is how a save naming a read-only package is refused for any non-overridable type. The by-name read keeps serving the package's position.
+- **What does not change.** A position no package declares still saves (`allowRuntimeCreate`). Permission sets and capabilities are refused as before. The declared-positions seeder in `@objectstack/plugin-security` now reads the stack's positions from the engine registry rather than the metadata service, as it does for permission sets. It seeds the same names, labels and descriptions.
+- **To customize a packaged position,** create a position with a different name.
@@ -188,7 +188,7 @@ describe('the two registration seams enumerate ONE collection list (#7049)', ()
   const CANDIDATES = [
     'actions', 'views', 'pages', 'dashboards', 'reports', 'datasets', 'themes',
     'flows', 'webhooks', 'jobs',
-    'permissions', 'capabilities', 'sharingRules',
+    'positions', 'permissions', 'capabilities', 'sharingRules',
     'agents', 'tools', 'skills', 'apis',
     'hooks', 'mappings', 'analyticsCubes', 'connectors',
     'emailTemplates', 'docs', 'books',
 
@@ -0,0 +1,276 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * [#22203] Every package-declared item of a `security`-domain type that the
+ * type registry declares `allowOrgOverride: false` is refused at the metadata
+ * save door — and the refusal is the type-level one, fed by the provenance
+ * seam, not a lock written for one type.
+ *
+ * ## What was wrong, measured
+ *
+ * The save door's packaged-base check is already type-level: it refuses a write
+ * onto an item a code package ships when the type has no overlay channel
+ * (`refusePackagedBaseOverride` in `saveMetaItem` on an environment-scoped
+ * kernel, `SysMetadataRepository.assertAllowed`'s `override-artifact` intent on
+ * a host-config one), and both read `allowOrgOverride` off
+ * `DEFAULT_METADATA_TYPE_REGISTRY`. What decides "a code package ships it" is
+ * `isArtifactBacked`, which asks this engine's SchemaRegistry for an entry a
+ * package registered (`getArtifactItem`, `_packageId` provenance).
+ *
+ * The only seam that puts a stack collection into that registry under its
+ * package is `registerMetadataCollections` over `METADATA_ARRAY_KEYS`. That list
+ * carried `permissions` and `capabilities`, and the retired `roles` instead of
+ * `positions` (ADR-0090 D3 renamed the collection; the rename reached the
+ * artifact door's map and never this one). So a stack-declared position had no
+ * registry entry, `isArtifactBacked('position', name)` answered false, the save
+ * took the `runtime-only` intent, and `allowRuntimeCreate: true` let it through:
+ * `PUT /api/v1/meta/position/NAME` over a package's position answered 200 and
+ * the saved row then won the by-name read. A permission set was refused on the
+ * same door because its collection was on the list.
+ *
+ * ## What this file pins
+ *
+ * The set under test is ENUMERATED FROM THE REGISTRY, not written out: every
+ * `domain: 'security'` row with `allowOrgOverride: false`. For each, a real
+ * `ObjectQL` registers a manifest that declares one item through the type's
+ * stack collection, and a real `ObjectStackProtocolImplementation` over that
+ * engine is asked to save over it — on both topologies, because the two answer
+ * at different layers. The rejection is asserted on the envelope (`code` +
+ * `status`), and nothing may be stored.
+ *
+ * No security plugin is composed here, so the permission-set refusal below is
+ * the protocol's own type-level door, not plugin-security's packaged
+ * permission-set lock (which stays a stricter layer on top of it).
+ *
+ * Controls, so the refusals cannot pass for the wrong reason: a position no
+ * package declares still saves (the `allowRuntimeCreate` tier is untouched); an
+ * `allowOrgOverride: true` type still saves over its packaged item; and the
+ * by-name read after a refusal still serves the package's declaration.
+ */
+
+import { describe, expect, it } from 'vitest';
+import type { ServiceObject } from '@objectstack/spec/data';
+import { DEFAULT_METADATA_TYPE_REGISTRY } from '@objectstack/spec/kernel';
+import { singularToPlural } from '@objectstack/spec/shared';
+import { ObjectStackProtocolImplementation } from '@objectstack/metadata-protocol';
+import { SysMetadataAuditObject, SysMetadataCommitObject, SysMetadataHistoryObject } from '@objectstack/metadata-core';
+import { ObjectQL } from './engine.js';
+
+const PKG = 'com.acme.security_catalog';
+const NAME = 'probe_item';
+
+/** The pin's population, read off the registry: every non-overridable `security` type. */
+const SECURITY_NON_OVERRIDABLE = DEFAULT_METADATA_TYPE_REGISTRY
+    .filter((entry) => entry.domain === 'security' && entry.allowOrgOverride === false)
+    .map((entry) => entry.type);
+
+/**
+ * A schema-valid body per type. A type that joins the population without one
+ * fails the first case below by name, rather than dropping out of the pin.
+ */
+const BODIES: Record<string, Record<string, unknown>> = {
+    permission: { name: NAME, label: 'Probe', objects: {} },
+    position: { name: NAME, label: 'Probe' },
+    capability: { name: NAME, label: 'Probe' },
+};
+
+/** The overlayable control: `allowOrgOverride: true`, declared through a stack collection. */
+const OVERLAYABLE_TYPE = 'email_template';
+const OVERLAYABLE_BODY = { name: NAME, label: 'Probe', subject: 'Probe', bodyHtml: '<p>Probe</p>' };
+
+const sysMetadataObject: ServiceObject = {
+    name: 'sys_metadata',
+    label: 'System Metadata',
+    fields: {
+        id: { name: 'id', label: 'ID', type: 'text' as const },
+        type: { name: 'type', label: 'Type', type: 'text' as const, required: true },
+        name: { name: 'name', label: 'Name', type: 'text' as const, required: true },
+        organization_id: { name: 'organization_id', label: 'Org', type: 'text' as const },
+        package_id: { name: 'package_id', label: 'Package', type: 'text' as const },
+        metadata: { name: 'metadata', label: 'Body', type: 'textarea' as const },
+        checksum: { name: 'checksum', label: 'Checksum', type: 'text' as const, maxLength: 71 },
+        state: { name: 'state', label: 'State', type: 'text' as const },
+        version: { name: 'version', label: 'Version', type: 'number' as const },
+        created_at: { name: 'created_at', label: 'Created', type: 'datetime' as const },
+        updated_at: { name: 'updated_at', label: 'Updated', type: 'datetime' as const },
+    },
+};
+
+/** In-memory driver, copied from `save-meta-response-conformance.test.ts`; equality-only WHERE. */
+function makeMemoryDriver() {
+    const stores = new Map<string, Map<string, Record<string, unknown>>>();
+    const storeFor = (obj: string) => {
+        let s = stores.get(obj);
+        if (!s) { s = new Map(); stores.set(obj, s); }
+        return s;
+    };
+    let nextId = 0;
+    // `$and` / `$or` are conjoined WITH their sibling keys, the way a real
+    // driver ANDs them (#7620).
+    const matchesWhere = (row: Record<string, unknown>, where: any): boolean => {
+        if (!where || typeof where !== 'object') return true;
+        for (const [k, v] of Object.entries(where)) {
+            if (k === '$and' && Array.isArray(v)) {
+                if (!v.every((w: any) => matchesWhere(row, w))) return false;
+                continue;
+            }
+            if (k === '$or' && Array.isArray(v)) {
+                if (!v.some((w: any) => matchesWhere(row, w))) return false;
+                continue;
+            }
+            if (k.startsWith('$')) continue;
+            const rowVal = row[k];
+            const expected = (v && typeof v === 'object' && '$eq' in (v as any)) ? (v as any).$eq : v;
+            const a = rowVal === undefined ? null : rowVal;
+            const b = expected === undefined ? null : expected;
+            if (a !== b) return false;
+        }
+        return true;
+    };
+    const driver: any = {
+        name: 'memory', version: '0.0.0', supports: {} as any,
+        async connect() {}, async disconnect() {}, async checkHealth() { return true; },
+        async execute() { return null; },
+        async find(object: string, ast: any) {
+            const rows = Array.from(storeFor(object).values()).filter((r) => matchesWhere(r, ast?.where));
+            // The caller's bound, after the filter, by presence (`check:objectql-double-limit`).
+            return typeof ast?.limit === 'number' ? rows.slice(0, ast.limit) : rows;
+        },
+        async findOne(object: string, ast: any) {
+            for (const r of storeFor(object).values()) if (matchesWhere(r, ast?.where)) return r;
+            return null;
+        },
+        async create(object: string, data: Record<string, unknown>) {
+            nextId += 1;
+            const id = (data.id as string) ?? `r_${nextId}`;
+            const row = { ...data, id };
+            storeFor(object).set(id, row);
+            return row;
+        },
+        async update(object: string, id: string, data: Record<string, unknown>) {
+            const s = storeFor(object);
+            const cur = s.get(id);
+            if (!cur) throw new Error(`not found: ${object}/${id}`);
+            const updated = { ...cur, ...data, id };
+            s.set(id, updated);
+            return updated;
+        },
+        async upsert(object: string, data: Record<string, unknown>) {
+            const id = data.id as string | undefined;
+            if (id && storeFor(object).has(id)) return this.update(object, id, data);
+            return this.create(object, data);
+        },
+        async delete(object: string, id: string) { return storeFor(object).delete(id); },
+        async count(object: string, ast: any) { return (await this.find(object, ast)).length; },
+        async bulkCreate(object: string, rows: Record<string, unknown>[]) {
+            return Promise.all(rows.map((r) => this.create(object, r)));
+        },
+        async bulkUpdate() { return []; }, async bulkDelete() {},
+        async beginTransaction() { return { commit: async () => {}, rollback: async () => {} }; },
+        async commit() {}, async rollback() {},
+    };
+    return { driver, stores };
+}
+
+/** One manifest declaring `NAME` through every security collection under test, plus the control. */
+function securityManifest(): Record<string, unknown> {
+    const manifest: Record<string, unknown> = { id: PKG, name: 'security_catalog' };
+    for (const type of SECURITY_NON_OVERRIDABLE) {
+        if (BODIES[type]) manifest[singularToPlural(type)] = [BODIES[type]];
+    }
+    manifest[singularToPlural(OVERLAYABLE_TYPE)] = [OVERLAYABLE_BODY];
+    return manifest;
+}
+
+type Topology = 'environment-scoped' | 'host-config';
+const TOPOLOGIES: readonly Topology[] = ['environment-scoped', 'host-config'];
+
+async function boot(topology: Topology) {
+    const engine = new ObjectQL();
+    const { driver, stores } = makeMemoryDriver();
+    engine.registerDriver(driver, true);
+    await engine.init();
+    engine.registry.registerObject(sysMetadataObject, 'test-package');
+    for (const o of [SysMetadataHistoryObject, SysMetadataAuditObject, SysMetadataCommitObject]) {
+        engine.registry.registerObject(o as any, 'test-package');
+    }
+    engine.registerApp(securityManifest());
+    const protocol = new ObjectStackProtocolImplementation(
+        engine,
+        () => new Map(),
+        topology === 'environment-scoped' ? 'env_prod' : undefined,
+    );
+    const storedRows = () => Array.from(stores.get('sys_metadata')?.values() ?? []);
+    return { engine, protocol, storedRows };
+}
+
+describe('[#22203] security-domain allowOrgOverride:false — the package door is type-level', () => {
+    it('the population is read from the registry, and every member has a fixture', () => {
+        // The three the registry declares today. Asserted as a superset so a
+        // fourth `security` type joins the pin instead of breaking it — and the
+        // per-type loop below then demands a body for it by name.
+        expect(SECURITY_NON_OVERRIDABLE).toEqual(expect.arrayContaining(['permission', 'position', 'capability']));
+        for (const type of SECURITY_NON_OVERRIDABLE) {
+            expect(BODIES[type], `no fixture body for security type '${type}'`).toBeDefined();
+        }
+    });
+
+    it.each(SECURITY_NON_OVERRIDABLE)('the provenance seam registers a stack-declared %s under its package', async (type) => {
+        const { engine } = await boot('host-config');
+        // The input `isArtifactBacked` reads: an entry a package registered.
+        const artifact = engine.registry.getArtifactItem<any>(type, NAME);
+        expect(artifact?._packageId).toBe(PKG);
+        expect(artifact?._provenance).toBe('package');
+    });
+
+    for (const topology of TOPOLOGIES) {
+        it.each(SECURITY_NON_OVERRIDABLE)(`${topology}: a save over a package-declared %s is refused 403 NOT_OVERRIDABLE and stores nothing`, async (type) => {
+            const { protocol, storedRows } = await boot(topology);
+
+            const err: any = await protocol
+                .saveMetaItem({ type, name: NAME, item: { ...BODIES[type], label: 'Environment fork' } })
+                .then(() => undefined, (e: unknown) => e);
+
+            expect({ code: err?.code, status: err?.status }).toEqual({ code: 'NOT_OVERRIDABLE', status: 403 });
+            expect(storedRows()).toHaveLength(0);
+        });
+    }
+
+    it('the by-name read after the refusal still serves the package\'s position', async () => {
+        const { protocol } = await boot('host-config');
+        await protocol
+            .saveMetaItem({ type: 'position', name: NAME, item: { name: NAME, label: 'Environment fork' } })
+            .catch(() => undefined);
+
+        const read: any = await protocol.getMetaItem({ type: 'position', name: NAME });
+        expect(read?.item?.label).toBe('Probe');
+    });
+
+    // ── controls ─────────────────────────────────────────────────────────
+
+    it.each(TOPOLOGIES)('%s: a position no package declares still saves (the allowRuntimeCreate tier)', async (topology) => {
+        const { protocol, storedRows } = await boot(topology);
+
+        const result: any = await protocol.saveMetaItem({
+            type: 'position', name: 'env_only_position', item: { name: 'env_only_position', label: 'Env only' },
+        });
+
+        expect(result?.success).toBe(true);
+        expect(storedRows().map((r: any) => `${r.type}/${r.name}`)).toEqual(['position/env_only_position']);
+    });
+
+    it.each(TOPOLOGIES)(`%s: an allowOrgOverride:true type (${OVERLAYABLE_TYPE}) still saves over its packaged item`, async (topology) => {
+        const entry = DEFAULT_METADATA_TYPE_REGISTRY.find((e) => e.type === OVERLAYABLE_TYPE);
+        expect(entry?.allowOrgOverride).toBe(true);
+        const { engine, protocol, storedRows } = await boot(topology);
+        // The control is only a control if its item is package-declared too.
+        expect(engine.registry.getArtifactItem<any>(OVERLAYABLE_TYPE, NAME)?._packageId).toBe(PKG);
+
+        const result: any = await protocol.saveMetaItem({
+            type: OVERLAYABLE_TYPE, name: NAME, item: { ...OVERLAYABLE_BODY, label: 'Environment overlay' },
+        });
+
+        expect(result?.success).toBe(true);
+        expect(storedRows().map((r: any) => `${r.type}/${r.name}`)).toEqual([`${OVERLAYABLE_TYPE}/${NAME}`]);
+    });
+});