diff --git a/lib/admin/__tests__/extension-store-growth.test.ts b/lib/admin/__tests__/extension-store-growth.test.ts
new file mode 100644
index 000000000..e45613437
--- /dev/null
+++ b/lib/admin/__tests__/extension-store-growth.test.ts
@@ -0,0 +1,69 @@
+// @vitest-environment node
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { existsSync, mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import path from 'node:path';
+
+// What admins never see must not pile up (in the config dir or the shared
+// store, #1066): the packages users sent for review are capped in total,
+// the longest-decided going first, and kept-version folders without their
+// entry.json (a copy cut short) are swept with the history.
+
+const HASH = (c: string) => c.repeat(64);
+let dir: string;
+
+beforeEach(() => {
+  dir = mkdtempSync(path.join(tmpdir(), 'bw-ext-growth-'));
+  vi.stubEnv('ADMIN_CONFIG_DIR', dir);
+  vi.resetModules();
+  for (const name of ['bulwark.admin.pluginApprovals', 'bulwark.admin.pluginRegistry', 'bulwark.admin.pluginSigning']) {
+    delete (globalThis as Record<symbol, unknown>)[Symbol.for(name)];
+  }
+});
+
+afterEach(() => {
+  vi.unstubAllEnvs();
+  rmSync(dir, { recursive: true, force: true });
+});
+
+describe('packages kept for approval review', () => {
+  it('drop the longest-decided package once they hold more than the cap, never a pending one', async () => {
+    const approvals = await import('../plugin-approvals');
+    approvals.setApprovalPackageCapForTests(10);
+    const zip = new Uint8Array(6);
+
+    await approvals.requestApproval('first-one', HASH('a'), {}, 'alice@example.org');
+    await approvals.saveApprovalBundle('first-one', HASH('a'), zip);
+    await approvals.decideApproval('first-one', HASH('a'), 'approved', 'admin');
+
+    await approvals.requestApproval('second-one', HASH('b'), {}, 'bob@example.org');
+    await approvals.saveApprovalBundle('second-one', HASH('b'), zip);
+    await approvals.requestApproval('third-one', HASH('c'), {}, 'carol@example.org');
+    await approvals.saveApprovalBundle('third-one', HASH('c'), zip);
+
+    expect(await approvals.readApprovalBundle('first-one', HASH('a'))).toBeNull();
+    // Over the cap now, but both are still pending: kept.
+    expect(await approvals.readApprovalBundle('second-one', HASH('b'))).not.toBeNull();
+    expect(await approvals.readApprovalBundle('third-one', HASH('c'))).not.toBeNull();
+    expect((await approvals.listApprovals()).map((e) => [e.pluginId, e.packageBytes])).toEqual([
+      ['first-one', undefined], ['second-one', 6], ['third-one', 6],
+    ]);
+    approvals.setApprovalPackageCapForTests(null);
+  });
+});
+
+describe('extension history', () => {
+  it('sweeps a kept-version folder that has no entry.json', async () => {
+    const broken = path.join(dir, 'plugins', 'history', 'demo-plugin', '9.9.9');
+    mkdirSync(broken, { recursive: true });
+    writeFileSync(path.join(broken, 'bundle.js'), 'half()');
+
+    const registry = await import('../plugin-registry');
+    const plugin = { id: 'demo-plugin', name: 'D', version: '1.0.0', author: 'a', description: '', type: 'hook', permissions: [], entrypoint: 'index.js', enabled: true, installedAt: 'x', updatedAt: 'x' };
+    await registry.savePlugin(plugin, 'v1()');
+    await registry.savePlugin({ ...plugin, version: '1.1.0' }, 'v2()');
+
+    expect(existsSync(broken)).toBe(false);
+    expect(existsSync(path.join(dir, 'plugins', 'history', 'demo-plugin', '1.0.0', 'entry.json'))).toBe(true);
+  });
+});
diff --git a/lib/admin/extension-history.ts b/lib/admin/extension-history.ts
index cc9fcd24e..a3949d36e 100644
--- a/lib/admin/extension-history.ts
+++ b/lib/admin/extension-history.ts
@@ -168,6 +168,13 @@ async function prune(kind: ExtensionKind, id: string): Promise<void> {
   for (const stale of all.slice(KEEP)) {
     await removeFolder(kind, stale.dir);
   }
+  // Folders without a readable entry.json (a copy that was cut short) are
+  // never listed or restored; sweep them so they don't pile up.
+  const root = historyRoot(id);
+  const listed = new Set(all.map((e) => e.dir));
+  for (const name of await versionFolders(kind, root).catch(() => [] as string[])) {
+    if (!listed.has(`${root}/${name}`)) await removeFolder(kind, `${root}/${name}`);
+  }
 }
 
 /**
diff --git a/lib/admin/plugin-approvals.ts b/lib/admin/plugin-approvals.ts
index 462bc114b..793fa3066 100644
--- a/lib/admin/plugin-approvals.ts
+++ b/lib/admin/plugin-approvals.ts
@@ -46,6 +46,8 @@ export interface ApprovalEntry {
   requestedAt: string;     // ISO 8601
   decidedBy?: string;      // admin username (set on approve/deny)
   decidedAt?: string;
+  /** Size of the package kept for review (plugin-approvals/<id>-<hash>.zip), when one is. */
+  packageBytes?: number;
 }
 
 interface ApprovalsFile {
@@ -62,9 +64,45 @@ function bundleId(pluginId: string, bundleHash: string): string {
   return `plugin-approvals/${pluginId}-${bundleHash}.zip`;
 }
 
+/**
+ * The packages kept for review hold at most this much together. Beyond it
+ * the packages of the longest-decided requests go first; pending ones are
+ * always kept (the admin still has to read them). Packages stored before
+ * their size was recorded aren't counted.
+ */
+let maxPackageBytes = 100 * 1024 * 1024;
+
+/** A smaller cap (tests). */
+export function setApprovalPackageCapForTests(bytes: number | null): void {
+  maxPackageBytes = bytes ?? 100 * 1024 * 1024;
+}
+
 export async function saveApprovalBundle(pluginId: string, bundleHash: string, zip: Uint8Array): Promise<void> {
   assertWritable('plugin-approvals.saveBundle');
   await pluginApprovalDocs().put(bundleId(pluginId, bundleHash), Buffer.from(zip));
+  let dropped: Array<{ pluginId: string; bundleHash: string }> = [];
+  await changeStored((file) => {
+    dropped = [];
+    let changed = false;
+    const entry = findEntry(file, pluginId, bundleHash);
+    if (entry && entry.packageBytes !== zip.byteLength) {
+      entry.packageBytes = zip.byteLength;
+      changed = true;
+    }
+    let total = file.entries.reduce((sum, e) => sum + (e.packageBytes ?? 0), 0);
+    const oldestDecidedFirst = file.entries
+      .filter((e) => e.status !== 'pending' && e.packageBytes)
+      .sort((a, b) => (a.decidedAt ?? a.requestedAt).localeCompare(b.decidedAt ?? b.requestedAt));
+    for (const old of oldestDecidedFirst) {
+      if (total <= maxPackageBytes) break;
+      total -= old.packageBytes!;
+      delete old.packageBytes;
+      dropped.push({ pluginId: old.pluginId, bundleHash: old.bundleHash });
+      changed = true;
+    }
+    return changed;
+  });
+  for (const old of dropped) await deleteApprovalBundle(old.pluginId, old.bundleHash);
 }
 
 export async function readApprovalBundle(pluginId: string, bundleHash: string): Promise<Uint8Array | null> {