diff --git a/src/ouroboros/orchestrator/codex_cli_runtime.py b/src/ouroboros/orchestrator/codex_cli_runtime.py
index 8210b6f57..3e0395d1c 100644
--- a/src/ouroboros/orchestrator/codex_cli_runtime.py
+++ b/src/ouroboros/orchestrator/codex_cli_runtime.py
@@ -552,7 +552,7 @@ def _build_command(
         prompt: str | None = None,
     ) -> list[str]:
         """Build the CLI command args.  Prompt is fed via stdin separately."""
-        command = [self._cli_path, "exec"]
+        command = [self._cli_path, "exec", "--ignore-user-config"]
 
         command.extend(
             [
diff --git a/src/ouroboros/providers/codex_cli_adapter.py b/src/ouroboros/providers/codex_cli_adapter.py
index d2af6c957..27ddfe2b2 100644
--- a/src/ouroboros/providers/codex_cli_adapter.py
+++ b/src/ouroboros/providers/codex_cli_adapter.py
@@ -358,6 +358,7 @@ def _build_command(
         command = [
             self._cli_path,
             "exec",
+            "--ignore-user-config",
             "--json",
             "--skip-git-repo-check",
             "-C",
diff --git a/tests/unit/orchestrator/test_codex_cli_runtime.py b/tests/unit/orchestrator/test_codex_cli_runtime.py
index 9ccaae4f7..db945afba 100644
--- a/tests/unit/orchestrator/test_codex_cli_runtime.py
+++ b/tests/unit/orchestrator/test_codex_cli_runtime.py
@@ -209,13 +209,15 @@ def test_build_command_for_new_session(self) -> None:
             output_last_message_path="/tmp/out.txt",
         )
 
-        assert command[:2] == ["/usr/local/bin/codex", "exec"]
+        assert Path(command[0]) == Path("/usr/local/bin/codex")
+        assert command[1] == "exec"
+        assert "--ignore-user-config" in command
         assert "--json" in command
         assert "--full-auto" in command
         assert "--model" in command
         assert "o3" in command
         assert "-C" in command
-        assert "/tmp/project" in command
+        assert Path(command[command.index("-C") + 1]) == Path("/tmp/project")
 
     def test_build_command_for_resume(self) -> None:
         """Builds an exec resume command when a session id is provided."""
@@ -233,7 +235,7 @@ def test_build_command_for_resume(self) -> None:
         assert command.index("--skip-git-repo-check") < resume_index
         assert command.index("--output-last-message") < resume_index
         assert command.index("-C") < resume_index
-        assert command[command.index("-C") + 1] == "/tmp/project"
+        assert Path(command[command.index("-C") + 1]) == Path("/tmp/project")
 
     def test_resolve_cli_path_falls_back_from_wrapper(self, tmp_path: Path) -> None:
         """Runtime should bypass wrappers the same way provider adapters do."""
@@ -452,7 +454,7 @@ async def test_execute_task_routes_ooo_input_through_shared_stateless_router(
         request = mock_resolve.call_args.args[1]
         assert isinstance(request, ResolveRequest)
         assert request.prompt == "ooo run seed.yaml"
-        assert request.cwd == "/tmp/project"
+        assert Path(request.cwd) == Path("/tmp/project")
         assert request.skills_dir == tmp_path
         dispatcher.assert_awaited_once()
         intercept_request = dispatcher.await_args.args[0]
@@ -1120,10 +1122,8 @@ async def test_execute_task_dispatches_interview_with_initial_context(
         intercept_request = dispatcher.await_args.args[0]
         assert intercept_request.mcp_tool == "ouroboros_interview"
         assert intercept_request.first_argument == "Build a REST API"
-        assert intercept_request.mcp_args == {
-            "initial_context": "Build a REST API",
-            "cwd": "/tmp/project",
-        }
+        assert intercept_request.mcp_args["initial_context"] == "Build a REST API"
+        assert Path(intercept_request.mcp_args["cwd"]) == Path("/tmp/project")
         mock_exec.assert_not_called()
         assert [message.content for message in messages] == [
             "Starting interview",
diff --git a/tests/unit/providers/test_codex_cli_adapter.py b/tests/unit/providers/test_codex_cli_adapter.py
index 013772c5f..201239856 100644
--- a/tests/unit/providers/test_codex_cli_adapter.py
+++ b/tests/unit/providers/test_codex_cli_adapter.py
@@ -207,6 +207,7 @@ def test_build_command_uses_read_only_by_default(self) -> None:
             model=None,
         )
 
+        assert "--ignore-user-config" in command
         assert "--sandbox" in command
         assert "read-only" in command
 
@@ -244,7 +245,7 @@ async def fake_create_subprocess_exec(*command: str, **kwargs: Any) -> _FakeProc
             output_index = command.index("--output-last-message") + 1
             Path(command[output_index]).write_text("Final answer", encoding="utf-8")
             assert "--model" not in command
-            assert kwargs["cwd"] == "/tmp/project"
+            assert Path(kwargs["cwd"]) == Path("/tmp/project")
             # Prompt is now fed via stdin, not as a positional argument
             assert kwargs.get("stdin") is not None
             return _FakeProcess(