diff --git a/src/auto_reverse/doc/client.py b/src/auto_reverse/doc/client.py
new file mode 100644
index 0000000..5ddeb0d
--- /dev/null
+++ b/src/auto_reverse/doc/client.py
@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+import subprocess
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+
+def client_gen_command(spec_path: Path, out_dir: Path) -> list[str]:
+    return [
+        "uvx",
+        "openapi-python-client",
+        "generate",
+        "--path",
+        str(spec_path),
+        "--output-path",
+        str(out_dir),
+    ]
+
+
+def generate_client(spec_path: Path, out_dir: Path) -> bool:
+    """Run the deterministic codegen; returns True on success."""
+    try:
+        subprocess.run(client_gen_command(spec_path, out_dir), check=True)
+        return True
+    except (subprocess.CalledProcessError, FileNotFoundError):
+        return False
diff --git a/tests/test_client.py b/tests/test_client.py
new file mode 100644
index 0000000..248891e
--- /dev/null
+++ b/tests/test_client.py
@@ -0,0 +1,16 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from auto_reverse.doc.client import client_gen_command
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+
+def test_command_references_spec_and_out(tmp_path: Path):
+    spec = tmp_path / "openapi.yaml"
+    out = tmp_path / "client"
+    cmd = client_gen_command(spec, out)
+    assert str(spec) in cmd
+    assert "openapi-python-client" in " ".join(cmd)