diff --git a/src/plugins/bundle-commands.test.ts b/src/plugins/bundle-commands.test.ts
index 28560e3b6c69..78b589db076d 100644
--- a/src/plugins/bundle-commands.test.ts
+++ b/src/plugins/bundle-commands.test.ts
@@ -8,6 +8,11 @@ import type { PluginManifestRecord } from "./manifest-registry.js";
 
 const mocks = vi.hoisted(() => ({
   plugins: [] as PluginManifestRecord[],
+  warn: vi.fn(),
+}));
+
+vi.mock("../logging/subsystem.js", () => ({
+  createSubsystemLogger: () => ({ warn: mocks.warn }),
 }));
 
 vi.mock("./manifest-registry.js", () => ({
@@ -36,6 +41,7 @@ const tempDirs: string[] = [];
 
 afterEach(async () => {
   mocks.plugins = [];
+  mocks.warn.mockReset();
   await Promise.all(tempDirs.splice(0).map((dir) => fs.rm(dir, { recursive: true, force: true })));
 });
 
@@ -224,4 +230,46 @@ describe("loadEnabledClaudeBundleCommands", () => {
       },
     );
   });
+
+  it("warns and skips oversized bundle commands without dropping siblings", async () => {
+    const homeDir = await createTempDir("openclaw-bundle-commands-oversized-");
+    const workspaceDir = await createTempDir("openclaw-bundle-commands-oversized-ws-");
+
+    await writeClaudeBundleCommandFixture({
+      homeDir,
+      pluginId: "oversized-test",
+      commands: [
+        {
+          relativePath: "commands/normal.md",
+          contents: [
+            "---",
+            "description: Normal command that should be loaded",
+            "---",
+            "This is a normal command.",
+          ],
+        },
+      ],
+    });
+
+    const pluginRoot = resolveBundlePluginRoot(homeDir, "oversized-test");
+    const oversizedFilePath = path.join(pluginRoot, "commands", "oversized.md");
+    await fs.mkdir(path.dirname(oversizedFilePath), { recursive: true });
+    const oversizedContent = Buffer.alloc(1 * 1024 * 1024 + 1, "x");
+    await fs.writeFile(oversizedFilePath, oversizedContent);
+
+    const commands = loadEnabledClaudeBundleCommands({
+      workspaceDir,
+      cfg: {
+        plugins: {
+          entries: { "oversized-test": { enabled: true } },
+        },
+      },
+    });
+
+    expect(commands.map((entry) => entry.rawName)).toEqual(["normal"]);
+    expect(mocks.warn).toHaveBeenCalledOnce();
+    const warning = String(mocks.warn.mock.calls[0]?.[0]);
+    expect(warning).toContain(oversizedFilePath);
+    expect(warning).toContain("1048576");
+  });
 });
diff --git a/src/plugins/bundle-commands.ts b/src/plugins/bundle-commands.ts
index 634fd88fc1b9..da90ce0e23fe 100644
--- a/src/plugins/bundle-commands.ts
+++ b/src/plugins/bundle-commands.ts
@@ -10,7 +10,10 @@ import {
   stripFrontmatterBlock,
 } from "../../packages/markdown-core/src/frontmatter.js";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
+import { formatErrorMessage } from "../infra/errors.js";
 import { readRootJsonObjectSync } from "../infra/json-files.js";
+import { readRegularFileSync } from "../infra/regular-file.js";
+import { createSubsystemLogger } from "../logging/subsystem.js";
 import { isPathInsideWithRealpath } from "../security/scan-paths.js";
 import { parseFrontmatterBool } from "../shared/frontmatter.js";
 import {
@@ -33,6 +36,9 @@ type ClaudeBundleCommandSpec = {
   sourceFilePath: string;
 };
 
+const BUNDLE_COMMAND_MAX_BYTES = 1 * 1024 * 1024;
+const log = createSubsystemLogger("plugins/bundle-commands");
+
 function readClaudeBundleManifest(rootDir: string): Record<string, unknown> {
   const result = readRootJsonObjectSync({
     rootDir,
@@ -103,8 +109,11 @@ function loadBundleCommandsFromRoot(params: {
   for (const filePath of listMarkdownFilesRecursive(params.commandRoot)) {
     let raw: string;
     try {
-      raw = fs.readFileSync(filePath, "utf-8");
-    } catch {
+      raw = readRegularFileSync({ filePath, maxBytes: BUNDLE_COMMAND_MAX_BYTES }).buffer.toString(
+        "utf-8",
+      );
+    } catch (error) {
+      log.warn(`skipping unreadable bundle command file ${filePath}: ${formatErrorMessage(error)}`);
       continue;
     }
     const frontmatter = parseFrontmatterBlock(raw);