diff --git a/src/readme2demo/cli.py b/src/readme2demo/cli.py
index 4800c46..c522081 100644
--- a/src/readme2demo/cli.py
+++ b/src/readme2demo/cli.py
@@ -305,7 +305,7 @@ def run(
     ),
     engine: Optional[str] = typer.Option(None, help="Agent engine: claude-code | openhands"),
     model: Optional[str] = typer.Option(None, help="Model for planner/distiller/tutorial passes"),
-    output_dir: Optional[Path] = typer.Option(None, "--output-dir", help="Runs directory"),
+    output_dir: Optional[Path] = typer.Option(None, "-o", "--output-dir", help="Runs directory"),
     timeout: Optional[int] = typer.Option(None, help="Agent wall-clock timeout (s)"),
     budget_usd: Optional[float] = typer.Option(None, help="Abort if agent cost exceeds this"),
     max_turns: Optional[int] = typer.Option(None, help="Agent max turns"),
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 27e7a62..ce463f1 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -331,6 +331,12 @@ def test_version_flag():
     assert result.output.strip() != ""
 
 
+def test_run_output_dir_has_short_alias():
+    cmd = typer.main.get_command(app)
+    opts = {o for p in cmd.commands["run"].params for o in p.opts + p.secondary_opts}
+    assert "-o" in opts and "--output-dir" in opts
+
+
 def test_resume_rejects_missing_run_dir(tmp_path):
     missing = tmp_path / "missing-run"
     result = runner.invoke(app, ["resume", str(missing)])