diff --git a/src/index.ts b/src/index.ts
index 1c67deb..31e8de6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -20,6 +20,11 @@ cli.help();
 cli.version(packageJson.version);
 
 try {
+  if (process.argv.slice(2).length === 0) {
+    cli.outputHelp();
+    process.exit(0);
+  }
+
   cli.parse();
 } catch (err) {
   // CAC throws on unknown options / bad usage. Exit code 2 = USAGE per plan.
diff --git a/tests/e2e/global-flags.test.ts b/tests/e2e/global-flags.test.ts
index eb8d35a..fc70448 100644
--- a/tests/e2e/global-flags.test.ts
+++ b/tests/e2e/global-flags.test.ts
@@ -29,6 +29,17 @@ describe("e2e: global flags", () => {
     expect(output).toContain("doctor");
   });
 
+  it("no args exits 0 with command list", () => {
+    const result = runCli([]);
+    expect(result.exitCode).toBe(0);
+    const output = result.stdout + result.stderr;
+    expect(output).toContain("10x");
+    expect(output).toContain("auth");
+    expect(output).toContain("get");
+    expect(output).toContain("list");
+    expect(output).toContain("doctor");
+  });
+
   it("unknown option on a command exits 2 with usage error", () => {
     const result = runCli(["auth", "--nonexistent-flag"]);
     expect(result.exitCode).toBe(2);