diff --git a/bin/oh-my-opencode.js b/bin/oh-my-opencode.js
index 75b5794ce..0e644afc2 100755
--- a/bin/oh-my-opencode.js
+++ b/bin/oh-my-opencode.js
@@ -5,7 +5,12 @@
 import { spawnSync } from "node:child_process";
 import { readFileSync } from "node:fs";
 import { createRequire } from "node:module";
-import { getPlatformPackageCandidates, getBinaryPath } from "./platform.js";
+import { basename } from "node:path";
+import {
+  getPlatformPackageCandidates,
+  getBinaryPath,
+  resolvePlatformPackageBaseName,
+} from "./platform.js";
 
 const require = createRequire(import.meta.url);
 
@@ -74,12 +79,29 @@ function getSignalExitCode(signal) {
 function getPackageBaseName() {
   try {
     const packageJson = JSON.parse(readFileSync(new URL("../package.json", import.meta.url), "utf8"));
-    return packageJson.name || "oh-my-opencode";
+    return resolvePlatformPackageBaseName(packageJson.name || "oh-my-opencode");
   } catch {
     return "oh-my-opencode";
   }
 }
 
+/**
+ * Determine which bin name the user invoked us with (oh-my-opencode, oh-my-openagent, omo, lazycodex).
+ * Propagated to the compiled CLI binary via OMO_INVOCATION_NAME so it can route accordingly
+ * (e.g. `lazycodex` defaults to the Codex install flow).
+ * @returns {string}
+ */
+function getInvocationName() {
+  if (process.env.OMO_INVOCATION_NAME) {
+    return process.env.OMO_INVOCATION_NAME;
+  }
+  const argv1 = process.argv[1] ?? "";
+  if (!argv1) {
+    return "oh-my-opencode";
+  }
+  return basename(argv1, ".js").replace(/\.exe$/, "");
+}
+
 function main() {
   const { platform, arch } = process;
   const libcFamily = getLibcFamily();
@@ -119,11 +141,18 @@ function main() {
     process.exit(1);
   }
 
+  const invocationName = getInvocationName();
+  const childEnv = {
+    ...process.env,
+    OMO_INVOCATION_NAME: invocationName,
+  };
+
   for (let index = 0; index < resolvedBinaries.length; index += 1) {
     const currentBinary = resolvedBinaries[index];
     const hasFallback = index < resolvedBinaries.length - 1;
     const result = spawnSync(currentBinary.binPath, process.argv.slice(2), {
       stdio: "inherit",
+      env: childEnv,
     });
 
     if (result.error) {
diff --git a/bin/platform.d.ts b/bin/platform.d.ts
index ed3987957..f9375b7c1 100644
--- a/bin/platform.d.ts
+++ b/bin/platform.d.ts
@@ -2,6 +2,7 @@ export declare function getPlatformPackage(options: {
   platform: string;
   arch: string;
   libcFamily?: string | null;
+  packageBaseName?: string;
 }): string;
 
 export declare function getPlatformPackageCandidates(options: {
@@ -9,6 +10,9 @@ export declare function getPlatformPackageCandidates(options: {
   arch: string;
   libcFamily?: string | null;
   preferBaseline?: boolean;
+  packageBaseName?: string;
 }): string[];
 
 export declare function getBinaryPath(pkg: string, platform: string): string;
+
+export declare function resolvePlatformPackageBaseName(wrapperPackageName: string): string;
diff --git a/bin/platform.js b/bin/platform.js
index 5790cf3dc..0ed616615 100644
--- a/bin/platform.js
+++ b/bin/platform.js
@@ -1,6 +1,20 @@
 // bin/platform.js
 // Shared platform detection module - used by wrapper and postinstall
 
+const PLATFORM_PACKAGE_BASE_BY_WRAPPER_NAME = {
+  lazycodex: "oh-my-opencode",
+};
+
+/**
+ * Resolve platform package base from a wrapper package name.
+ * Wrapper aliases can intentionally reuse an existing platform package family.
+ * @param {string} wrapperPackageName
+ * @returns {string}
+ */
+export function resolvePlatformPackageBaseName(wrapperPackageName) {
+  return PLATFORM_PACKAGE_BASE_BY_WRAPPER_NAME[wrapperPackageName] ?? wrapperPackageName;
+}
+
 /**
  * Get the platform-specific package name
  * @param {{ platform: string, arch: string, libcFamily?: string | null, packageBaseName?: string }} options
diff --git a/bin/platform.test.ts b/bin/platform.test.ts
index 0d21f3dd4..49eba4d5d 100644
--- a/bin/platform.test.ts
+++ b/bin/platform.test.ts
@@ -1,6 +1,46 @@
 // bin/platform.test.ts
 import { describe, expect, test } from "bun:test";
-import { getBinaryPath, getPlatformPackage, getPlatformPackageCandidates } from "./platform.js";
+import {
+  getBinaryPath,
+  getPlatformPackage,
+  getPlatformPackageCandidates,
+  resolvePlatformPackageBaseName,
+} from "./platform.js";
+
+describe("resolvePlatformPackageBaseName", () => {
+  test("maps lazycodex wrapper to oh-my-opencode platform package family", () => {
+    // #given
+    const wrapperPackageName = "lazycodex";
+
+    // #when
+    const resolvedPlatformBase = resolvePlatformPackageBaseName(wrapperPackageName);
+
+    // #then
+    expect(resolvedPlatformBase).toBe("oh-my-opencode");
+  });
+
+  test("keeps oh-my-opencode wrapper mapped to oh-my-opencode platform package family", () => {
+    // #given
+    const wrapperPackageName = "oh-my-opencode";
+
+    // #when
+    const resolvedPlatformBase = resolvePlatformPackageBaseName(wrapperPackageName);
+
+    // #then
+    expect(resolvedPlatformBase).toBe("oh-my-opencode");
+  });
+
+  test("keeps oh-my-openagent wrapper mapped to oh-my-openagent platform package family", () => {
+    // #given
+    const wrapperPackageName = "oh-my-openagent";
+
+    // #when
+    const resolvedPlatformBase = resolvePlatformPackageBaseName(wrapperPackageName);
+
+    // #then
+    expect(resolvedPlatformBase).toBe("oh-my-openagent");
+  });
+});
 
 describe("getPlatformPackage", () => {
   // #region Darwin platforms