diff --git a/scripts/test-live-shard.mjs b/scripts/test-live-shard.mjs
index e6e418af0c6..c8634c3db98 100644
--- a/scripts/test-live-shard.mjs
+++ b/scripts/test-live-shard.mjs
@@ -6,7 +6,7 @@ import { spawnPnpmRunner } from "./pnpm-runner.mjs";
 
 const LIVE_TEST_SUFFIX = ".live.test.ts";
 
-export const LIVE_TEST_SHARDS = Object.freeze([
+export const RELEASE_LIVE_TEST_SHARDS = Object.freeze([
   "native-live-src-agents",
   "native-live-src-gateway-core",
   "native-live-src-gateway-profiles",
@@ -15,15 +15,19 @@ export const LIVE_TEST_SHARDS = Object.freeze([
   "native-live-extensions-a-k",
   "native-live-extensions-l-n",
   "native-live-extensions-openai",
-  "native-live-extensions-o-z",
   "native-live-extensions-o-z-other",
   "native-live-extensions-xai",
-  "native-live-extensions-media",
   "native-live-extensions-media-audio",
   "native-live-extensions-media-music",
   "native-live-extensions-media-video",
 ]);
 
+export const LIVE_TEST_SHARDS = Object.freeze([
+  ...RELEASE_LIVE_TEST_SHARDS,
+  "native-live-extensions-o-z",
+  "native-live-extensions-media",
+]);
+
 function walkFiles(rootDir) {
   const files = [];
   if (!fs.existsSync(rootDir)) {
diff --git a/test/scripts/test-live-shard.test.ts b/test/scripts/test-live-shard.test.ts
index 8e4d112ba6c..8f503801ff0 100644
--- a/test/scripts/test-live-shard.test.ts
+++ b/test/scripts/test-live-shard.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, it } from "vitest";
 import {
   LIVE_TEST_SHARDS,
+  RELEASE_LIVE_TEST_SHARDS,
   collectAllLiveTestFiles,
   selectLiveShardFiles,
 } from "../../scripts/test-live-shard.mjs";
@@ -9,7 +10,7 @@ describe("scripts/test-live-shard", () => {
   const allFiles = collectAllLiveTestFiles();
 
   it("partitions every native live test into exactly one release shard", () => {
-    const selected = LIVE_TEST_SHARDS.flatMap((shard) =>
+    const selected = RELEASE_LIVE_TEST_SHARDS.flatMap((shard) =>
       selectLiveShardFiles(shard, allFiles).map((file) => ({ file, shard })),
     );
     const selectedFiles = selected.map(({ file }) => file);
@@ -19,6 +20,32 @@ describe("scripts/test-live-shard", () => {
     expect(new Set(selectedFiles).size).toBe(selectedFiles.length);
   });
 
+  it("keeps aggregate shard aliases available outside the release partition", () => {
+    expect(LIVE_TEST_SHARDS).toEqual(expect.arrayContaining(RELEASE_LIVE_TEST_SHARDS));
+    expect(LIVE_TEST_SHARDS).toEqual(
+      expect.arrayContaining(["native-live-extensions-o-z", "native-live-extensions-media"]),
+    );
+
+    const oToZAlias = selectLiveShardFiles("native-live-extensions-o-z", allFiles);
+    expect(oToZAlias).toEqual(
+      expect.arrayContaining(selectLiveShardFiles("native-live-extensions-o-z-other", allFiles)),
+    );
+    expect(oToZAlias).toEqual(
+      expect.arrayContaining(selectLiveShardFiles("native-live-extensions-xai", allFiles)),
+    );
+
+    const mediaAlias = selectLiveShardFiles("native-live-extensions-media", allFiles);
+    expect(mediaAlias).toEqual(
+      expect.arrayContaining(selectLiveShardFiles("native-live-extensions-media-audio", allFiles)),
+    );
+    expect(mediaAlias).toEqual(
+      expect.arrayContaining(selectLiveShardFiles("native-live-extensions-media-music", allFiles)),
+    );
+    expect(mediaAlias).toEqual(
+      expect.arrayContaining(selectLiveShardFiles("native-live-extensions-media-video", allFiles)),
+    );
+  });
+
   it("keeps slow gateway backend and media-capable extension files in their own shards", () => {
     expect(selectLiveShardFiles("native-live-src-gateway-backends", allFiles)).toEqual(
       expect.arrayContaining([