diff --git a/scripts/openclaw-prepack.ts b/scripts/openclaw-prepack.ts
index c125d658779..508294fb69d 100644
--- a/scripts/openclaw-prepack.ts
+++ b/scripts/openclaw-prepack.ts
@@ -4,6 +4,7 @@ import { spawnSync } from "node:child_process";
 import { existsSync, readdirSync } from "node:fs";
 import { pathToFileURL } from "node:url";
 import { formatErrorMessage } from "../src/infra/errors.ts";
+import { writePackageDistInventory } from "../src/infra/package-dist-inventory.ts";
 
 const skipPrepackPreparedEnv = "OPENCLAW_PREPACK_PREPARED";
 const requiredPreparedPathGroups = [
@@ -116,18 +117,24 @@ function runBuildSmoke(): void {
   run(process.execPath, ["scripts/test-built-bundled-channel-entry-smoke.mjs"]);
 }
 
-function main(): void {
+async function writeDistInventory(): Promise<void> {
+  await writePackageDistInventory(process.cwd());
+}
+
+async function main(): Promise<void> {
   const pnpmCommand = process.platform === "win32" ? "pnpm.cmd" : "pnpm";
   if (shouldSkipPrepack()) {
     ensurePreparedArtifacts();
+    await writeDistInventory();
     runBuildSmoke();
     return;
   }
   run(pnpmCommand, ["build"]);
   run(pnpmCommand, ["ui:build"]);
+  await writeDistInventory();
   runBuildSmoke();
 }
 
 if (import.meta.url === pathToFileURL(process.argv[1] ?? "").href) {
-  main();
+  await main();
 }
diff --git a/src/cli/update-cli.test.ts b/src/cli/update-cli.test.ts
index 7bbf8e8be23..2666369ba9f 100644
--- a/src/cli/update-cli.test.ts
+++ b/src/cli/update-cli.test.ts
@@ -6,6 +6,7 @@ import { Command } from "commander";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 import { TEST_BUNDLED_RUNTIME_SIDECAR_PATHS } from "../../test/helpers/bundled-runtime-sidecars.js";
 import type { OpenClawConfig, ConfigFileSnapshot } from "../config/types.openclaw.js";
+import { writePackageDistInventory } from "../infra/package-dist-inventory.js";
 import type { UpdateRunResult } from "../infra/update-runner.js";
 import { withEnvAsync } from "../test-utils/env.js";
 import { createCliRuntimeCapture } from "./test-runtime-capture.js";
@@ -785,12 +786,8 @@ describe("update-cli", () => {
       await fs.mkdir(path.dirname(absolutePath), { recursive: true });
       await fs.writeFile(absolutePath, "export {};\n", "utf-8");
     }
+    await writePackageDistInventory(pkgRoot);
     readPackageVersion.mockResolvedValue("2026.3.23");
-    pathExists.mockImplementation(async (candidate: string) =>
-      TEST_BUNDLED_RUNTIME_SIDECAR_PATHS.some(
-        (relativePath) => candidate === path.join(pkgRoot, relativePath),
-      ),
-    );
     vi.mocked(runCommandWithTimeout).mockImplementation(async (argv) => {
       if (Array.isArray(argv) && argv[0] === "npm" && argv[1] === "root" && argv[2] === "-g") {
         return {
diff --git a/src/infra/package-dist-inventory.test.ts b/src/infra/package-dist-inventory.test.ts
new file mode 100644
index 00000000000..b2beaf55395
--- /dev/null
+++ b/src/infra/package-dist-inventory.test.ts
@@ -0,0 +1,45 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+import { withTempDir } from "../test-helpers/temp-dir.js";
+import {
+  collectPackageDistInventoryErrors,
+  PACKAGE_DIST_INVENTORY_RELATIVE_PATH,
+  writePackageDistInventory,
+} from "./package-dist-inventory.js";
+
+describe("package dist inventory", () => {
+  it("tracks missing and stale dist files", async () => {
+    await withTempDir({ prefix: "openclaw-dist-inventory-" }, async (packageRoot) => {
+      const currentFile = path.join(packageRoot, "dist", "current-BR6xv1a1.js");
+      await fs.mkdir(path.dirname(currentFile), { recursive: true });
+      await fs.writeFile(currentFile, "export {};\n", "utf8");
+
+      await expect(writePackageDistInventory(packageRoot)).resolves.toEqual([
+        "dist/current-BR6xv1a1.js",
+      ]);
+      await expect(collectPackageDistInventoryErrors(packageRoot)).resolves.toEqual([]);
+
+      await fs.rm(currentFile);
+      await fs.writeFile(
+        path.join(packageRoot, "dist", "stale-CJUAgRQR.js"),
+        "export {};\n",
+        "utf8",
+      );
+
+      await expect(collectPackageDistInventoryErrors(packageRoot)).resolves.toEqual([
+        "missing packaged dist file dist/current-BR6xv1a1.js",
+        "unexpected packaged dist file dist/stale-CJUAgRQR.js",
+      ]);
+    });
+  });
+
+  it("fails closed when the inventory is missing", async () => {
+    await withTempDir({ prefix: "openclaw-dist-inventory-missing-" }, async (packageRoot) => {
+      await fs.mkdir(path.join(packageRoot, "dist"), { recursive: true });
+      await expect(collectPackageDistInventoryErrors(packageRoot)).resolves.toEqual([
+        `missing package dist inventory ${PACKAGE_DIST_INVENTORY_RELATIVE_PATH}`,
+      ]);
+    });
+  });
+});
diff --git a/src/infra/package-dist-inventory.ts b/src/infra/package-dist-inventory.ts
new file mode 100644
index 00000000000..8f7d245ef55
--- /dev/null
+++ b/src/infra/package-dist-inventory.ts
@@ -0,0 +1,86 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+
+export const PACKAGE_DIST_INVENTORY_RELATIVE_PATH = "dist/postinstall-inventory.json";
+
+function normalizeRelativePath(value: string): string {
+  return value.replace(/\\/g, "/");
+}
+
+async function collectRelativeFiles(rootDir: string, baseDir: string): Promise<string[]> {
+  try {
+    const entries = await fs.readdir(rootDir, { withFileTypes: true });
+    const files = await Promise.all(
+      entries.map(async (entry) => {
+        const entryPath = path.join(rootDir, entry.name);
+        if (entry.isDirectory()) {
+          return await collectRelativeFiles(entryPath, baseDir);
+        }
+        if (entry.isFile() || entry.isSymbolicLink()) {
+          const relativePath = normalizeRelativePath(path.relative(baseDir, entryPath));
+          return relativePath === PACKAGE_DIST_INVENTORY_RELATIVE_PATH ? [] : [relativePath];
+        }
+        return [];
+      }),
+    );
+    return files.flat().toSorted((left, right) => left.localeCompare(right));
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code === "ENOENT") {
+      return [];
+    }
+    throw error;
+  }
+}
+
+export async function collectPackageDistInventory(packageRoot: string): Promise<string[]> {
+  return await collectRelativeFiles(path.join(packageRoot, "dist"), packageRoot);
+}
+
+export async function writePackageDistInventory(packageRoot: string): Promise<string[]> {
+  const inventory = await collectPackageDistInventory(packageRoot);
+  const inventoryPath = path.join(packageRoot, PACKAGE_DIST_INVENTORY_RELATIVE_PATH);
+  await fs.mkdir(path.dirname(inventoryPath), { recursive: true });
+  await fs.writeFile(inventoryPath, `${JSON.stringify(inventory, null, 2)}\n`, "utf8");
+  return inventory;
+}
+
+export async function readPackageDistInventory(packageRoot: string): Promise<string[]> {
+  const inventoryPath = path.join(packageRoot, PACKAGE_DIST_INVENTORY_RELATIVE_PATH);
+  const raw = await fs.readFile(inventoryPath, "utf8");
+  const parsed = JSON.parse(raw) as unknown;
+  if (!Array.isArray(parsed) || parsed.some((entry) => typeof entry !== "string")) {
+    throw new Error(`Invalid package dist inventory at ${PACKAGE_DIST_INVENTORY_RELATIVE_PATH}`);
+  }
+  return [...new Set(parsed.map(normalizeRelativePath))].toSorted((left, right) =>
+    left.localeCompare(right),
+  );
+}
+
+export async function collectPackageDistInventoryErrors(packageRoot: string): Promise<string[]> {
+  let expectedFiles: string[];
+  try {
+    expectedFiles = await readPackageDistInventory(packageRoot);
+  } catch (error) {
+    if ((error as NodeJS.ErrnoException).code === "ENOENT") {
+      return [`missing package dist inventory ${PACKAGE_DIST_INVENTORY_RELATIVE_PATH}`];
+    }
+    throw error;
+  }
+
+  const actualFiles = await collectPackageDistInventory(packageRoot);
+  const expectedSet = new Set(expectedFiles);
+  const actualSet = new Set(actualFiles);
+  const errors: string[] = [];
+
+  for (const relativePath of expectedFiles) {
+    if (!actualSet.has(relativePath)) {
+      errors.push(`missing packaged dist file ${relativePath}`);
+    }
+  }
+  for (const relativePath of actualFiles) {
+    if (!expectedSet.has(relativePath)) {
+      errors.push(`unexpected packaged dist file ${relativePath}`);
+    }
+  }
+  return errors;
+}
diff --git a/src/infra/update-global.test.ts b/src/infra/update-global.test.ts
index 92c86205e7d..92237821770 100644
--- a/src/infra/update-global.test.ts
+++ b/src/infra/update-global.test.ts
@@ -5,6 +5,7 @@ import { bundledDistPluginFile } from "../../test/helpers/bundled-plugin-paths.j
 import { BUNDLED_RUNTIME_SIDECAR_PATHS } from "../plugins/runtime-sidecar-paths.js";
 import { withTempDir } from "../test-helpers/temp-dir.js";
 import { captureEnv } from "../test-utils/env.js";
+import { writePackageDistInventory } from "./package-dist-inventory.js";
 import {
   canResolveRegistryVersionForPackageTarget,
   collectInstalledGlobalPackageErrors,
@@ -365,7 +366,7 @@ describe("update global helpers", () => {
     });
   });
 
-  it("checks bundled runtime sidecars, including Matrix helper-api", async () => {
+  it("checks installed dist against the packaged inventory", async () => {
     await withTempDir({ prefix: "openclaw-update-global-pkg-" }, async (packageRoot) => {
       await fs.writeFile(
         path.join(packageRoot, "package.json"),
@@ -377,12 +378,22 @@ describe("update global helpers", () => {
         await fs.mkdir(path.dirname(absolutePath), { recursive: true });
         await fs.writeFile(absolutePath, "export {};\n", "utf-8");
       }
+      await writePackageDistInventory(packageRoot);
 
       await expect(collectInstalledGlobalPackageErrors({ packageRoot })).resolves.toEqual([]);
 
       await fs.rm(path.join(packageRoot, MATRIX_HELPER_API));
       await expect(collectInstalledGlobalPackageErrors({ packageRoot })).resolves.toContain(
-        `missing bundled runtime sidecar ${MATRIX_HELPER_API}`,
+        `missing packaged dist file ${MATRIX_HELPER_API}`,
+      );
+
+      await fs.writeFile(
+        path.join(packageRoot, "dist", "stale-CJUAgRQR.js"),
+        "export {};\n",
+        "utf8",
+      );
+      await expect(collectInstalledGlobalPackageErrors({ packageRoot })).resolves.toContain(
+        "unexpected packaged dist file dist/stale-CJUAgRQR.js",
       );
     });
   });
diff --git a/src/infra/update-global.ts b/src/infra/update-global.ts
index dd6debeee39..3761319fe9e 100644
--- a/src/infra/update-global.ts
+++ b/src/infra/update-global.ts
@@ -2,9 +2,9 @@ import fsSync from "node:fs";
 import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
-import { BUNDLED_RUNTIME_SIDECAR_PATHS } from "../plugins/runtime-sidecar-paths.js";
 import { normalizeLowercaseStringOrEmpty } from "../shared/string-coerce.js";
 import { pathExists } from "../utils.js";
+import { collectPackageDistInventoryErrors } from "./package-dist-inventory.js";
 import { readPackageVersion } from "./package-json.js";
 import { applyPathPrepend } from "./path-prepend.js";
 
@@ -89,11 +89,7 @@ export async function collectInstalledGlobalPackageErrors(params: {
       `expected installed version ${params.expectedVersion}, found ${installedVersion ?? "<missing>"}`,
     );
   }
-  for (const relativePath of BUNDLED_RUNTIME_SIDECAR_PATHS) {
-    if (!(await pathExists(path.join(params.packageRoot, relativePath)))) {
-      errors.push(`missing bundled runtime sidecar ${relativePath}`);
-    }
-  }
+  errors.push(...(await collectPackageDistInventoryErrors(params.packageRoot)));
   return errors;
 }
 
diff --git a/src/infra/update-runner.test.ts b/src/infra/update-runner.test.ts
index 2119dfd904c..3d3c5f1c56d 100644
--- a/src/infra/update-runner.test.ts
+++ b/src/infra/update-runner.test.ts
@@ -6,6 +6,7 @@ import { BUNDLED_RUNTIME_SIDECAR_PATHS } from "../plugins/runtime-sidecar-paths.
 import { createSuiteTempRootTracker } from "../test-helpers/temp-dir.js";
 import { withEnvAsync } from "../test-utils/env.js";
 import { pathExists } from "../utils.js";
+import { writePackageDistInventory } from "./package-dist-inventory.js";
 import { resolveStableNodePath } from "./stable-node-path.js";
 import { runGatewayUpdate } from "./update-runner.js";
 
@@ -231,6 +232,7 @@ describe("runGatewayUpdate", () => {
       "utf-8",
     );
     await writeBundledRuntimeSidecars(pkgRoot);
+    await writePackageDistInventory(pkgRoot);
   }
 
   async function writeGlobalPackageVersion(pkgRoot: string, version = "2.0.0") {
@@ -240,6 +242,7 @@ describe("runGatewayUpdate", () => {
       "utf-8",
     );
     await writeBundledRuntimeSidecars(pkgRoot);
+    await writePackageDistInventory(pkgRoot);
   }
 
   async function writeBundledRuntimeSidecars(pkgRoot: string) {
@@ -1176,7 +1179,9 @@ describe("runGatewayUpdate", () => {
           JSON.stringify({ name: "openclaw", version: "2.0.0" }),
           "utf-8",
         );
-        await fs.rm(path.join(pkgRoot, "dist"), { recursive: true, force: true });
+        await writeBundledRuntimeSidecars(pkgRoot);
+        await writePackageDistInventory(pkgRoot);
+        await fs.rm(path.join(pkgRoot, WHATSAPP_LIGHT_RUNTIME_API), { force: true });
       },
     });
 
@@ -1185,7 +1190,7 @@ describe("runGatewayUpdate", () => {
     expect(result.status).toBe("error");
     expect(result.reason).toBe("global install verify");
     expect(result.steps.at(-1)?.stderrTail).toContain(
-      `missing bundled runtime sidecar ${WHATSAPP_LIGHT_RUNTIME_API}`,
+      `missing packaged dist file ${WHATSAPP_LIGHT_RUNTIME_API}`,
     );
   });