diff --git a/bin/oh-my-opencode.js b/bin/oh-my-opencode.js
index 0e644afc2..1a151a8c1 100755
--- a/bin/oh-my-opencode.js
+++ b/bin/oh-my-opencode.js
@@ -6,6 +6,7 @@ import { spawnSync } from "node:child_process";
 import { readFileSync } from "node:fs";
 import { createRequire } from "node:module";
 import { basename } from "node:path";
+import { fileURLToPath } from "node:url";
 import {
   getPlatformPackageCandidates,
   getBinaryPath,
@@ -77,9 +78,13 @@ function getSignalExitCode(signal) {
 }
 
 function getPackageBaseName() {
+  return resolvePlatformPackageBaseName(getWrapperPackageName());
+}
+
+function getWrapperPackageName() {
   try {
     const packageJson = JSON.parse(readFileSync(new URL("../package.json", import.meta.url), "utf8"));
-    return resolvePlatformPackageBaseName(packageJson.name || "oh-my-opencode");
+    return packageJson.name || "oh-my-opencode";
   } catch {
     return "oh-my-opencode";
   }
@@ -102,10 +107,44 @@ function getInvocationName() {
   return basename(argv1, ".js").replace(/\.exe$/, "");
 }
 
+function shouldRunBundledLazyCodexCli(packageName, invocationName) {
+  return packageName === "lazycodex" && invocationName === "lazycodex";
+}
+
+function runBundledLazyCodexCli(invocationName) {
+  const cliPath = fileURLToPath(new URL("../dist/cli/index.js", import.meta.url));
+  const result = spawnSync("bun", [cliPath, ...process.argv.slice(2)], {
+    stdio: "inherit",
+    env: {
+      ...process.env,
+      OMO_INVOCATION_NAME: invocationName,
+    },
+  });
+
+  if (result.error) {
+    console.error("\nlazycodex: Failed to execute bundled CLI with Bun.");
+    console.error("Install Bun or run through `bunx lazycodex`.");
+    console.error(`Error: ${result.error.message}\n`);
+    process.exit(2);
+  }
+
+  if (result.signal) {
+    process.exit(getSignalExitCode(result.signal));
+  }
+
+  process.exit(result.status ?? 1);
+}
+
 function main() {
   const { platform, arch } = process;
   const libcFamily = getLibcFamily();
-  const packageBaseName = getPackageBaseName();
+  const wrapperPackageName = getWrapperPackageName();
+  const invocationName = getInvocationName();
+  if (shouldRunBundledLazyCodexCli(wrapperPackageName, invocationName)) {
+    runBundledLazyCodexCli(invocationName);
+  }
+
+  const packageBaseName = resolvePlatformPackageBaseName(wrapperPackageName);
   const avx2Supported = supportsAvx2();
   
   let packageCandidates;
@@ -141,7 +180,6 @@ function main() {
     process.exit(1);
   }
 
-  const invocationName = getInvocationName();
   const childEnv = {
     ...process.env,
     OMO_INVOCATION_NAME: invocationName,
diff --git a/bin/oh-my-opencode.test.ts b/bin/oh-my-opencode.test.ts
new file mode 100644
index 000000000..5350292b9
--- /dev/null
+++ b/bin/oh-my-opencode.test.ts
@@ -0,0 +1,78 @@
+import { afterEach, describe, expect, test } from "bun:test";
+import { spawnSync } from "node:child_process";
+import { chmod, cp, mkdir, mkdtemp, readFile, realpath, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const testRoots: string[] = [];
+
+afterEach(async () => {
+  await Promise.all(testRoots.splice(0).map((path) => rm(path, { recursive: true, force: true })));
+});
+
+describe("lazycodex bin wrapper", () => {
+  test("runs the bundled Bun CLI instead of stale OMO platform binaries", async () => {
+    // #given
+    const fixture = await createLazyCodexFixture();
+    const nodePath = Bun.which("node") ?? "node";
+
+    // #when
+    const result = spawnSync(nodePath, [fixture.lazycodexBin, "install", "--no-tui"], {
+      encoding: "utf8",
+      env: {
+        ...process.env,
+        CAPTURE_DIR: fixture.captureDir,
+        PATH: `${fixture.fakeBinDir}:${process.env.PATH ?? ""}`,
+      },
+    });
+
+    // #then
+    expect(result.status).toBe(23);
+    expect((await readFile(join(fixture.captureDir, "env"), "utf8")).trim()).toBe("lazycodex");
+    expect((await readFile(join(fixture.captureDir, "args"), "utf8")).trim().split("\n")).toEqual([
+      await realpath(fixture.bundledCli),
+      "install",
+      "--no-tui",
+    ]);
+  });
+});
+
+async function createLazyCodexFixture() {
+  const root = await mkdtemp(join(tmpdir(), "lazycodex-bin-wrapper-"));
+  testRoots.push(root);
+
+  const binDir = join(root, "bin");
+  const distCli = join(root, "dist", "cli", "index.js");
+  const fakeBinDir = join(root, "fake-bin");
+  const captureDir = join(root, "capture");
+  await mkdir(binDir, { recursive: true });
+  await mkdir(dirname(distCli), { recursive: true });
+  await mkdir(fakeBinDir, { recursive: true });
+  await mkdir(captureDir, { recursive: true });
+
+  await cp(fileURLToPath(new URL("./oh-my-opencode.js", import.meta.url)), join(binDir, "lazycodex"));
+  await cp(fileURLToPath(new URL("./platform.js", import.meta.url)), join(binDir, "platform.js"));
+  await writeFile(join(root, "package.json"), JSON.stringify({ name: "lazycodex", type: "module" }));
+  await writeFile(distCli, "#!/usr/bin/env bun\n");
+
+  const fakeBun = join(fakeBinDir, "bun");
+  await writeFile(
+    fakeBun,
+    [
+      "#!/bin/sh",
+      "printf '%s\\n' \"$OMO_INVOCATION_NAME\" > \"$CAPTURE_DIR/env\"",
+      "printf '%s\\n' \"$@\" > \"$CAPTURE_DIR/args\"",
+      "exit 23",
+      "",
+    ].join("\n"),
+  );
+  await chmod(fakeBun, 0o755);
+
+  return {
+    bundledCli: distCli,
+    captureDir,
+    fakeBinDir,
+    lazycodexBin: join(binDir, "lazycodex"),
+  };
+}