@@ -0,0 +1,13 @@
+---
+"@objectstack/cloud-connection": patch
+---
+
+`GET /api/v1/marketplace/install-local` now answers each entry's `withSampleData` for the caller's own organization. Before, after a purge in organization A, the listing read as organization B answered `withSampleData: false` while B still held every one of its seed rows.
+
+Clause-②: no
+
+- **What was wrong.** The listing served the install ledger's `withSampleData`, one value per install. Under an organization wall, sample data is per organization: the install, the reseed and the purge each act in the caller's active organization. A purge in A flipped the one value for every organization, and a restart kept it.
+- **What it does now.** The listing reads the rows. An entry answers `true` when at least one of the package's seed rows is in the caller's scope. Rows are matched the way the purge matches them, by each dataset's `externalId`. "At least one" is exactly when the purge has something to delete, and it decides whether the console labels its reseed action "Add sample data" or "Reseed again". The purge's matching is now a separate read-only step, and the purge deletes what it returns, with the same counts and log lines as before.
+- **Scope.** Under a wall, the scope is the caller's active organization. A session with no active organization reads nothing, so every entry answers `false` with `200`, and no row is read. Without a wall, the match covers the whole table, and the answer is the one the ledger records after an install, a purge and a reseed.
+- **When the rows cannot be read** (for example, a package the runtime did not load), the entry answers `false`, and the server log says why at `warn`, once per entry per request.
+- **The response keeps its shape.** The ledger keeps its shape too. Its `withSampleData` and `sampleDataPurged` stay as install-time records, and their docs now say they are not per organization.
@@ -42,15 +42,26 @@ export interface InstalledManifestEntry {
     manifest: any;
     installedAt: string;
     installedBy: string | null;
-    /** Whether the bundled seed datasets have been loaded into the kernel
-     *  database. True after install (seedNow=true) or an explicit reseed;
-     *  false after a purge. Persisted so the UI can show "Add" vs "Re-seed". */
+    /** Install-time record: true after an install that seeded, a reseed or a
+     *  rehydrate heal that landed rows; false after a purge. ONE value per
+     *  install, NOT per organization — under an organization wall it records
+     *  whichever organization seeded or purged last.
+     *
+     *  ⛔ Not the answer to "does this caller's organization have the sample
+     *  data?". The GET listing derives that per request from the caller's own
+     *  rows (MarketplaceInstallLocalPlugin.sampleDataInScope, #21775) and does
+     *  not read this field. */
     withSampleData?: boolean;
     /** True only after an explicit purge-sample-data call. The rehydrate-time
      *  sample-data healer (see MarketplaceInstallLocalPlugin.maybeHealSampleData)
      *  must not resurrect demo rows the user deliberately removed — an empty
      *  table after a purge is desired state, not data loss. Cleared again by
-     *  install/reseed runs that land rows. */
+     *  install/reseed runs that land rows.
+     *
+     *  Like `withSampleData`, ONE value per install, not per organization.
+     *  The healer is its one reader, and under an organization wall the healer
+     *  heals nothing at all, so this field decides something only without a
+     *  wall, where the install is one tenant. */
     sampleDataPurged?: boolean;
     /**
      * [ADR-0120 D5e] The installer's answer to the `isolated`-posture question
 
@@ -269,7 +269,11 @@ describe('#9011 — an authenticated non-operator gets the inventory WITHOUT the
             manifestId: 'app.test.crm',
             version: '1.4.0',
             installedAt: INSTALLED.installedAt,
-            withSampleData: true,
+            // The ledger records `true`, but this manifest bundles no seed
+            // datasets, so no seed row can be in the caller's scope: the listing
+            // answers from the rows, not the record (#21775, pinned in
+            // `marketplace-install-local-purge.test.ts`).
+            withSampleData: false,
         });
 
         // ② The half it NARROWS — absent keys, not null values. `null` would be
 
@@ -44,7 +44,10 @@
  *            authenticated principal (anonymous → 401); `installedBy` and
  *            `storageDir` are served only to a `manage_metadata` holder
  *            (commit 01074e551). The four routes above require `manage_metadata`
- *            outright (#8976).
+ *            outright (#8976). Each entry's `withSampleData` says whether the
+ *            caller's own scope — its active organization under a wall —
+ *            holds any of the package's seed rows, read from the rows, never
+ *            from the install-wide ledger record (#21775).
  *
  *   DELETE /api/v1/marketplace/install-local/:manifestId
  *          → removes the cached manifest, withdraws the package from the
@@ -114,7 +117,7 @@ import {
 } from './local-manifest-source.js';
 import { ConnectionCredentialStore } from './connection-credential-store.js';
 import { MARKETPLACE_INSTALLED_UI_BUNDLE } from './marketplace-ui.js';
-import { purgeSeedRows } from './marketplace-install-local-purge.js';
+import { matchSeedRows, purgeSeedRows, type PurgeSeedDataset } from './marketplace-install-local-purge.js';
 import type { IHttpServer, IMetadataService, IObjectQLEngine } from '@objectstack/spec/contracts';
 import type { DeletePackageRequest, UninstallCleanupOutcome } from '@objectstack/metadata-protocol';
 
@@ -299,6 +302,17 @@ function manifestIdOf(p: any): string | undefined {
     return p?.manifest?.id ?? p?.id ?? p?.manifest?.name ?? undefined;
 }
 
+/**
+ * The seed datasets a cached manifest bundles: its `data[]` entries that name
+ * an object and carry records. One reading for the two doors that match seed
+ * rows — the purge, and the listing's `withSampleData` (#21775).
+ */
+function seedDatasetsOf(manifest: any): PurgeSeedDataset[] {
+    return Array.isArray(manifest?.data)
+        ? manifest.data.filter((d: any) => d && d.object && Array.isArray(d.records))
+        : [];
+}
+
 /**
  * [ADR-0093 D4/D5, ADR-0105 D1 / #5262] Is an organization wall actually IN
  * FORCE for this boot? Both seeding decisions in this plugin key off it.
@@ -1344,6 +1358,12 @@ export class MarketplaceInstallLocalPlugin implements Plugin {
      * the four mutating doors use, not a second session read. Two auth
      * mechanisms in one file is how the next gap gets created, and this file has
      * already produced one.
+     *
+     * ## [#21775] `withSampleData` is the caller's own scope, read from its rows
+     *
+     * Each entry's `withSampleData` answers "does MY scope hold this package's
+     * sample data?" — derived per request by {@link sampleDataInScope}, never
+     * read from the ledger's install-wide record of the same name.
      */
     private handleList = async (c: any, ctx: PluginContext): Promise<Response> => {
         // Before the ledger is touched, exactly as the mutating doors refuse
@@ -1355,6 +1375,7 @@ export class MarketplaceInstallLocalPlugin implements Plugin {
 
         const { entries, skipped } = this.readAll();
         this.warnSkippedLedgerEntries(ctx, skipped, 'it is MISSING from the installed-apps list served to the console');
+        const withSampleData = await this.sampleDataInScope(c, ctx, entries);
         return c.json({
             success: true,
             data: {
@@ -1364,7 +1385,7 @@ export class MarketplaceInstallLocalPlugin implements Plugin {
                     manifestId: e.manifestId,
                     version: e.version,
                     installedAt: e.installedAt,
-                    withSampleData: e.withSampleData ?? false,
+                    withSampleData: withSampleData.has(e.manifestId),
                     ...(operator ? { installedBy: e.installedBy } : {}),
                 })),
                 total: entries.length,
@@ -1373,6 +1394,116 @@ export class MarketplaceInstallLocalPlugin implements Plugin {
         }, 200);
     };
 
+    /**
+     * [#21775] The listed entries whose sample data is in the CALLER'S scope —
+     * the set the listing answers each entry's `withSampleData` from.
+     *
+     * ## The rows are the authority, not the ledger
+     *
+     * The ledger's `withSampleData` / `sampleDataPurged` are install-time
+     * records: one value per install, flipped by whichever organization seeded
+     * or purged last. Under an organization wall sample data is per
+     * organization — the install, the reseed and the purge each act in the
+     * caller's active organization, and the per-organization replay seeds every
+     * new one — so the listing that read the record told organization B "no
+     * sample data" after a purge in organization A, while B held every one of
+     * its seed rows. The ledger shape stays as it is; the listing stops reading
+     * it.
+     *
+     * ## Present = at least one seed row, identified the purge's way
+     *
+     * An entry is in the set when {@link matchSeedRows} — the purge's own
+     * identification (each dataset's `externalId`), read-only — finds at least
+     * ONE of the package's seed rows in scope. Not "all", and not a count: the
+     * console reads the flag to enable its purge item and to word its reseed
+     * item ("Add sample data" / "Reseed again"), and the purge has work to do
+     * exactly when one seed row is there. A seed record the purge could not
+     * identify either (no key value, a key two rows carry) is not evidence of
+     * presence; the purge reports those when it runs.
+     *
+     * ## Scope — the purge's
+     *
+     * Under a wall, the caller's active organization, from the same
+     * `organizationWallActive` + `resolveActiveOrgId` pair the purge scopes
+     * with. Without a wall the deployment is one logical tenant and the match is
+     * table-wide, as the purge's is, so the derived answer is the one the
+     * ledger records after an install that seeded, a purge and a reseed. Where
+     * a door's write did not land whole — a purge the engine refused for some
+     * rows, rows deleted by hand — the rows answer and the record does not.
+     *
+     * A walled session with NO active organization reads nothing: every entry
+     * answers `false`, HTTP 200, and no row is read (ADR-0123 D2 — a
+     * tenant-scoped read resolves to nothing, not an error). The doors that
+     * would act on that answer, reseed and purge, refuse the same session with
+     * D2's write refusal.
+     *
+     * ## When the rows cannot be read
+     *
+     * No metadata service, a dependency graph that does not build, an object
+     * whose rows the engine will not return: the entry answers `false`, and why
+     * is logged at `warn` — once per entry per request, the way this door
+     * reports a corrupt ledger entry — to the operator, with the wire shape
+     * unchanged.
+     */
+    private sampleDataInScope = async (c: any, ctx: PluginContext, entries: InstalledEntry[]): Promise<Set<string>> => {
+        const present = new Set<string>();
+        const seeded = entries
+            .map((entry) => ({ entry, datasets: seedDatasetsOf(entry.manifest) }))
+            .filter(({ datasets }) => datasets.length > 0);
+        if (seeded.length === 0) return present;
+
+        let organizationId: string | undefined;
+        if (organizationWallActive(ctx)) {
+            const resolved = await this.resolveActiveOrgId(c, ctx);
+            // [ADR-0123 D2] No organization, so no organization's rows to read.
+            if (!resolved) return present;
+            organizationId = resolved;
+        }
+
+        const unread = (manifestId: string, why: string): void => {
+            ctx.logger?.warn?.(
+                `[MarketplaceInstallLocal] ${manifestId}: the installed-apps listing could not read this package's `
+                + `seed rows (${why}), so it answers withSampleData: false for it`,
+            );
+        };
+        let ql: IObjectQLEngine | undefined;
+        let metadata: IMetadataService | undefined;
+        try { ql = ctx.getService<IObjectQLEngine>('objectql'); } catch { /* no data engine */ }
+        try { metadata = ctx.getService<IMetadataService>('metadata'); } catch { /* no metadata service */ }
+        if (!ql || !metadata) {
+            for (const { entry } of seeded) {
+                unread(entry.manifestId, 'the data engine (objectql) or the metadata service is not available on this runtime');
+            }
+            return present;
+        }
+
+        for (const { entry, datasets } of seeded) {
+            try {
+                // The graph the purge reads its order and its reference keys
+                // from: the loader's own, over the package's seeded objects.
+                const { SeedLoaderService } = await import('@objectstack/runtime');
+                const loader = new (SeedLoaderService as any)(ql, metadata, ctx.logger);
+                const graph = await loader.buildDependencyGraph([...new Set(datasets.map((d) => String(d.object)))]);
+                const failedReads: string[] = [];
+                const match = await matchSeedRows({
+                    engine: ql,
+                    datasets,
+                    graph,
+                    organizationId,
+                    firstOnly: true,
+                    report: (problem) => {
+                        if (problem.kind === 'read') failedReads.push(`${problem.object}: ${problem.detail}`);
+                    },
+                });
+                if (match.rows.length > 0) present.add(entry.manifestId);
+                else if (failedReads.length > 0) unread(entry.manifestId, failedReads.join('; '));
+            } catch (err: any) {
+                unread(entry.manifestId, String(err?.message ?? err));
+            }
+        }
+        return present;
+    };
+
     private handleUninstall = async (c: any, ctx: PluginContext): Promise<Response> => {
         const admission = await this.requireInstallCapability(c, ctx, 'Uninstalling a package');
         if (!admission.ok) return admission.response;
@@ -1844,9 +1975,7 @@ export class MarketplaceInstallLocalPlugin implements Plugin {
             return this.unreadableLedgerEntry(c, ctx, manifestId, failure, 'purge sample data');
         }
 
-        const datasets = Array.isArray(entry.manifest?.data)
-            ? entry.manifest.data.filter((d: any) => d && d.object && Array.isArray(d.records))
-            : [];
+        const datasets = seedDatasetsOf(entry.manifest);
 
         if (datasets.length === 0) {
             return c.json({