@@ -0,0 +1,23 @@
+---
+'@objectstack/client': minor
+---
+
+feat(client): `meta.deleteItem` can name the package whose row it removes (`packageId`, sent as `?package=`), so a caller can follow the `409 RESOURCE_CONFLICT` remedy the reset door prescribes for an item two packages hold (#23293)
+
+Clause-②: yes (widening)
+
+**What is new.** `DeleteMetaItemOptions` gains `packageId?: string`. Both `deleteItem` declarations take it, the unscoped `ObjectStackClient.meta` and the environment-scoped `client.environment(id).meta`, and send it as `?package=<id>` through the one query builder they share. The name, the query key and the omission rule are the ones `saveItem`'s `packageId` already uses: only a non-empty id reaches the wire, and `undefined` and `''` send nothing.
+
+**Why.** A metadata item can hold one row per package (ADR-0048). The REST reset door `DELETE /api/v1/meta/:type/:name` reads `?package=` and refuses a delete that names no package of an item two or more packages hold, with `409 RESOURCE_CONFLICT`. The refusal names the packages and the remedy, which is to name one with `?package=`. This client had no option for it, so an SDK caller (an agent, the CLI, an app) could not do what the refusal said.
+
+FROM → TO:
+
+```ts
+// FROM: refused 409 RESOURCE_CONFLICT when two packages hold the item, with no way to name one
+await client.meta.deleteItem('view', 'shared_grid');
+
+// TO: removes com.acme.crm's row of the item and no other package's row
+await client.meta.deleteItem('view', 'shared_grid', { packageId: 'com.acme.crm' });
+```
+
+**Unchanged.** A delete without `packageId` sends the same request as before: no query string unless `state: 'draft'` is set, and no header unless `ifMatch` is set. `packageId` combines with `ifMatch` and `state` (`?state=draft&package=<id>`). `?dropStorage` is still not an option.
@@ -825,7 +825,7 @@ function metaSaveHeaders(options?: SaveMetaItemOptions): Record<string, string>
  * reads, made reachable from the SDK (commit cf71d73f8).
  *
  * `DELETE /meta/:type/:name` ("reset metadata item to artifact default")
- * reads THREE carriers. This bag declares TWO of them, and the third's
+ * reads FOUR carriers. This bag declares THREE of them, and the fourth's
  * absence is a ruling rather than an oversight:
  *
  * - {@link DeleteMetaItemOptions.ifMatch} — the ADR-0008 OCC pin. The door
@@ -837,9 +837,15 @@ function metaSaveHeaders(options?: SaveMetaItemOptions): Record<string, string>
  *   reset: discard the pending draft and leave the published overlay
  *   serving. Its absence did not make the SDK safer, it made the SDK's only
  *   reachable reset the full one.
+ * - {@link DeleteMetaItemOptions.packageId} — `?package=<id>` (#23293), the
+ *   package whose row the delete removes (ADR-0048: one row per package).
+ *   The door refuses a delete that names no package of an item two or more
+ *   packages hold, `409 RESOURCE_CONFLICT`, and naming the package is that
+ *   refusal's remedy, so without this member an SDK caller was prescribed a
+ *   parameter their client could not send.
  *
  * ⛔ `?dropStorage=true` is deliberately NOT a member, and adding it "for
- * completeness" reverses a decision. It is the one carrier of the three that
+ * completeness" reverses a decision. It is the one carrier of the four that
  * ADDS destructive reach — it drops the object's physical table after the
  * metadata row goes — no caller was measured needing it from this client,
  * and the door's repeated-parameter refusal exists because of that
@@ -894,6 +900,26 @@ export interface DeleteMetaItemOptions {
      * overlay too.
      */
     state?: 'active' | 'draft';
+    /**
+     * `?package=<id>` — the software package whose row this delete removes
+     * (`sys_metadata.package_id`, ADR-0048), and no other package's row.
+     *
+     * Omit to name no package. The door then removes the row of the one
+     * package the item's rows (at the deleted `state`) are bound to, removes
+     * the package-unbound row when none is bound, and refuses `409
+     * RESOURCE_CONFLICT`, naming the packages and deleting nothing, when two
+     * or more hold the item. Naming one of them here is what that refusal
+     * prescribes. A named package that holds no row removes nothing
+     * (`reset: false`).
+     *
+     * Same member name, same `package` query key and same truthy guard as
+     * {@link SaveMetaItemOptions.packageId}, the save door's address for the
+     * row it writes: only a non-empty id reaches the wire, and `undefined` and
+     * `''` both send nothing. The door reads the value through the same
+     * function as the save door, so it reads `all` as naming no package there
+     * too; this client forwards the id verbatim and decides nothing about it.
+     */
+    packageId?: string;
 }
 
 /**
@@ -906,15 +932,18 @@ export interface DeleteMetaItemOptions {
  * BYTE-IDENTICAL to what this method sent before the bag existed.
  *
  * `URLSearchParams.set` (never `append`) is load-bearing: the door REFUSES a
- * repeated `state` (#6877), so a builder that could emit the key twice would
- * turn a caller's option into a 400.
+ * repeated `state` (#6877) or `package` (#23165), so a builder that could emit
+ * a key twice would turn a caller's option into a 400.
  */
 function metaDeleteQuery(options?: DeleteMetaItemOptions): string {
     if (!options) return '';
     const params = new URLSearchParams();
     // Only `'draft'` is actionable server-side; `'active'` is the default
     // said out loud and sends nothing.
     if (options.state === 'draft') params.set('state', 'draft');
+    // [#23293] The save path's spelling and guard (`metaSaveQuery`): an empty
+    // id names no package, so it is never put on the wire.
+    if (options.packageId) params.set('package', options.packageId);
     const qs = params.toString();
     return qs ? `?${qs}` : '';
 }
@@ -1881,7 +1910,14 @@ export class ObjectStackClient {
      * @param type - Metadata type (e.g., 'object', 'plugin')
      * @param name - Item name (snake_case identifier)
      * @param options - {@link DeleteMetaItemOptions}: the ADR-0008 OCC pin
-     *   (`ifMatch`) and the narrower draft-only discard (`state: 'draft'`).
+     *   (`ifMatch`), the narrower draft-only discard (`state: 'draft'`), and
+     *   the package whose row the delete removes (`packageId`).
+     *
+     * NAME THE PACKAGE when two packages hold the item. A delete that names
+     * none of an item two or more packages hold is refused `409
+     * RESOURCE_CONFLICT`, naming them, and nothing is deleted; pass the
+     * package whose row you mean as `options.packageId` (`?package=` on the
+     * wire), as `saveItem` names the row it writes.
      *
      * PIN THE RESET. This verb destroys a row: unpinned, a reset issued
      * against a version somebody else has already replaced silently destroys
@@ -7710,7 +7746,8 @@ export class ScopedEnvironmentClient {
      * twin takes, and reaches the SAME handler: the scoped mount is not a
      * second implementation, it is one `registerForBase` call replayed
      * against `/environments/:environmentId` (see `RestServer`), so this door
-     * reads `?state=` — and the `If-Match` header — byte-identically. A bag
+     * reads `?state=` and `?package=` — and the `If-Match` header —
+     * byte-identically. A bag
      * on only one of the two clients would be a fresh divergence of the kind
      * #7019 rules against, not half a fix.
      *
 
@@ -33,6 +33,13 @@
  * (`the withheld third carrier`) so a later "completeness" patch has to argue
  * with a test rather than with a comment.
  *
+ * [#23293] A fourth carrier joined later: `?package=`, which the door reads
+ * since #23165, as `packageId` in the same bag. A delete naming no package of
+ * an item two packages hold is refused `409 RESOURCE_CONFLICT` with
+ * `?package=` as the remedy; the `[#23293]` cases pin that the SDK can now
+ * send it, on both declarations, and that the real door then removes that
+ * package's row and no other.
+ *
  * ## ⚠️ The instrument trap this file is shaped around
  *
  * The two declarations are TEXTUALLY IDENTICAL — `deleteItem: async (type:
@@ -257,6 +264,95 @@ describe('[#12181] meta.deleteItem carriers — ENVIRONMENT-SCOPED twin', () =>
     });
 });
 
+// ---------------------------------------------------------------------------
+// [#23293] The fourth carrier, `?package=` — on the wire, both declarations
+// ---------------------------------------------------------------------------
+//
+// Since #23165 the reset door reads `?package=` (the package whose row the
+// delete removes) and refuses a delete that names no package of an item two
+// packages hold, `409 RESOURCE_CONFLICT`, prescribing `?package=`. The bag had
+// no member for it, so an SDK caller could not follow that remedy. Every claim
+// is made on BOTH declarations, each beside its negative control, for the
+// textual-identity reason in this file's header.
+
+const PKG = 'com.qa.alpha';
+
+describe('[#23293] meta.deleteItem `packageId` — UNSCOPED ObjectStackClient.meta', () => {
+    it('a delete naming a package sends it as `?package=`', async () => {
+        const { client, fetchMock } = createMockClient(RESET_OK);
+        await client.meta.deleteItem('view', 'shared_grid', { packageId: PKG });
+        expect(String(fetchMock.mock.calls[0][0])).toBe(
+            `http://localhost:3000/api/v1/meta/view/shared_grid?package=${PKG}`,
+        );
+        expect(fetchMock.mock.calls[0][1].method).toBe('DELETE');
+        // A query parameter, never a header: the header set is the unpinned one.
+        expect(headerNamesOf(fetchMock)).toEqual(BASELINE_HEADERS);
+    });
+
+    it('NEGATIVE CONTROL: a delete naming none sends no query string, and `\'\'` names none', async () => {
+        const { client, fetchMock } = createMockClient(RESET_OK);
+        await client.meta.deleteItem('view', 'shared_grid');
+        await client.meta.deleteItem('view', 'shared_grid', {});
+        await client.meta.deleteItem('view', 'shared_grid', { packageId: '' });
+        await client.meta.deleteItem('view', 'shared_grid', { packageId: undefined });
+        for (let i = 0; i < 4; i++) {
+            expect(String(fetchMock.mock.calls[i][0])).toBe('http://localhost:3000/api/v1/meta/view/shared_grid');
+        }
+    });
+
+    it('rides beside `state` and `ifMatch` without disturbing either, the key sent once', async () => {
+        const { client, fetchMock } = createMockClient(RESET_OK);
+        await client.meta.deleteItem('view', 'shared_grid', { ifMatch: OCC_TOKEN, state: 'draft', packageId: PKG });
+        const url = new URL(String(fetchMock.mock.calls[0][0]));
+        expect(url.search).toBe(`?state=draft&package=${PKG}`);
+        // The door refuses a repeated `?package=` with a 400.
+        expect(url.searchParams.getAll('package')).toEqual([PKG]);
+        expect(headersOfCall(fetchMock)['If-Match']).toBe(OCC_TOKEN);
+    });
+
+    it('url-encodes a package id that needs it, as `saveItem` does', async () => {
+        const { client, fetchMock } = createMockClient(RESET_OK);
+        await client.meta.deleteItem('view', 'shared_grid', { packageId: 'acme/crm suite' });
+        await client.meta.saveItem('view', 'shared_grid', {}, { packageId: 'acme/crm suite' });
+        const queryOf = (i: number) => new URL(String(fetchMock.mock.calls[i][0])).search;
+        expect(queryOf(0)).toBe('?package=acme%2Fcrm+suite');
+        // IN STEP with the save door's address: the same id, the same bytes.
+        expect(queryOf(0)).toBe(queryOf(1));
+    });
+});
+
+describe('[#23293] meta.deleteItem `packageId` — ENVIRONMENT-SCOPED twin', () => {
+    it('a delete naming a package sends it as `?package=` on the scoped client too', async () => {
+        const { client, fetchMock } = createMockClient(RESET_OK);
+        await client.environment('env-123').meta.deleteItem('view', 'shared_grid', { packageId: PKG });
+        expect(String(fetchMock.mock.calls[0][0])).toBe(
+            `http://localhost:3000/api/v1/environments/env-123/meta/view/shared_grid?package=${PKG}`,
+        );
+    });
+
+    it('NEGATIVE CONTROL: on the scoped client a delete naming none sends no query string', async () => {
+        const { client, fetchMock } = createMockClient(RESET_OK);
+        const scoped = client.environment('env-123').meta;
+        await scoped.deleteItem('view', 'shared_grid');
+        await scoped.deleteItem('view', 'shared_grid', { packageId: '' });
+        for (let i = 0; i < 2; i++) {
+            expect(String(fetchMock.mock.calls[i][0])).toBe(
+                'http://localhost:3000/api/v1/environments/env-123/meta/view/shared_grid',
+            );
+        }
+    });
+
+    it('IN STEP with the unscoped twin: the same options put the same query on the wire', async () => {
+        const { client, fetchMock } = createMockClient(RESET_OK);
+        const opts = { state: 'draft', packageId: PKG } as const;
+        await client.meta.deleteItem('view', 'shared_grid', opts);
+        await client.environment('env-123').meta.deleteItem('view', 'shared_grid', opts);
+        const queryOf = (i: number) => new URL(String(fetchMock.mock.calls[i][0])).search;
+        expect(queryOf(1)).toBe(queryOf(0));
+        expect(queryOf(0)).toBe(`?state=draft&package=${PKG}`);
+    });
+});
+
 describe('[#12181] the withheld third carrier', () => {
     it('`dropStorage` is not a member of the bag, and never reaches the wire', async () => {
         const { client, fetchMock } = createMockClient(RESET_OK);
@@ -631,3 +727,71 @@ describe('[#12181] the real reset door: `?state=draft` discards ONLY the pending
         expect(after[0].state).toBe('active');
     }, 60_000);
 });
+
+describe('[#23293] the real reset door: an item two packages hold is deleted by naming its package', () => {
+    const OTHER_PKG = 'com.qa.beta';
+
+    /** One item saved into two packages THROUGH THE SDK: one row per package (ADR-0048). */
+    async function twoPackageItem(meta: ObjectStackClient['meta'] | ReturnType<ObjectStackClient['environment']>['meta'], name: string) {
+        await meta.saveItem('view', name, VIEW(name, 'A'), { packageId: PKG });
+        await meta.saveItem('view', name, VIEW(name, 'B'), { packageId: OTHER_PKG });
+    }
+
+    /** The package each stored row of `name` is bound to, sorted. */
+    async function packagesOf(engine: any, name: string): Promise<string[]> {
+        return (await overlayRows(engine, name)).map((r: any) => String(r.package_id)).sort();
+    }
+
+    it('NAMING NONE (the only delete the SDK could express before): refused 409 RESOURCE_CONFLICT, and nothing is deleted', async () => {
+        const { engine, client, deleteRequests } = await bootDoor();
+        await twoPackageItem(client.meta, 'two_pkg_probe');
+        expect(await packagesOf(engine, 'two_pkg_probe')).toEqual([PKG, OTHER_PKG].sort());
+
+        const err: any = await client.meta.deleteItem('view', 'two_pkg_probe').then(
+            () => { throw new Error('expected the package-less delete to be refused'); },
+            (e: any) => e,
+        );
+        // The envelope the caller branches on, not merely that something threw.
+        expect(err.code).toBe('RESOURCE_CONFLICT');
+        expect(err.httpStatus).toBe(409);
+        expect(await packagesOf(engine, 'two_pkg_probe')).toEqual([PKG, OTHER_PKG].sort());
+        // The probe: no package reached the protocol.
+        expect(deleteRequests).toHaveLength(1);
+        expect(deleteRequests[0]).not.toHaveProperty('packageId');
+    }, 60_000);
+
+    it('NAMING ONE: `{ packageId }` removes that package\'s row and no other', async () => {
+        const { engine, client, deleteRequests } = await bootDoor();
+        await twoPackageItem(client.meta, 'two_pkg_probe');
+
+        const reset: DeleteMetaItemResponse = await client.meta.deleteItem('view', 'two_pkg_probe', { packageId: PKG });
+
+        expect(reset.success).toBe(true);
+        expect(reset.reset).toBe(true);
+        expect(await packagesOf(engine, 'two_pkg_probe')).toEqual([OTHER_PKG]);
+        // POSITIVE CONTROL for the previous case's absence: the same probe sees
+        // the package arrive, read off `?package=` by the door.
+        expect(deleteRequests).toHaveLength(1);
+        expect(deleteRequests[0].packageId).toBe(PKG);
+    }, 60_000);
+
+    it('the ENVIRONMENT-SCOPED twin: refused naming none, and naming one removes only that row', async () => {
+        const { engine, client, deleteRequests } = await bootDoor();
+        const scoped = client.environment('env-123').meta;
+        await twoPackageItem(scoped, 'scoped_two_pkg');
+
+        const err: any = await scoped.deleteItem('view', 'scoped_two_pkg').then(
+            () => { throw new Error('expected the scoped package-less delete to be refused'); },
+            (e: any) => e,
+        );
+        expect(err.code).toBe('RESOURCE_CONFLICT');
+        expect(err.httpStatus).toBe(409);
+        expect(await packagesOf(engine, 'scoped_two_pkg')).toEqual([PKG, OTHER_PKG].sort());
+        expect(deleteRequests[0]).not.toHaveProperty('packageId');
+
+        const reset: DeleteMetaItemResponse = await scoped.deleteItem('view', 'scoped_two_pkg', { packageId: OTHER_PKG });
+        expect(reset.reset).toBe(true);
+        expect(await packagesOf(engine, 'scoped_two_pkg')).toEqual([PKG]);
+        expect(deleteRequests[1].packageId).toBe(OTHER_PKG);
+    }, 60_000);
+});