From a6397e1886dc6de35e191b10010b910ef49f6dd8 Mon Sep 17 00:00:00 2001
From: vanyae-cqc <vanya.eccles@quantinuum.com>
Date: Tue, 25 Nov 2025 10:09:34 +0000
Subject: [PATCH] feat: warn on deprecated QuantinuumConfig usage

---
 .cz.toml                                    |  5 ++++-
 quantinuum_schemas/models/backend_config.py | 22 +++++++++++++++++++++
 uv.lock                                     |  4 ++--
 3 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/.cz.toml b/.cz.toml
index a7deb99..e6fc21e 100644
--- a/.cz.toml
+++ b/.cz.toml
@@ -3,7 +3,10 @@ name = "cz_customize"
 tag_format = "v$version"
 version = "7.3.0"
 version_scheme = "semver"
-version_files = ["pyproject.toml"]
+version_files = [
+    "pyproject.toml:version",
+    "uv.lock:version"
+]
 update_changelog_on_bump = true
 template = "templates/CHANGELOG.md.j2"
 
diff --git a/quantinuum_schemas/models/backend_config.py b/quantinuum_schemas/models/backend_config.py
index 9a390ec..29f780f 100644
--- a/quantinuum_schemas/models/backend_config.py
+++ b/quantinuum_schemas/models/backend_config.py
@@ -8,6 +8,7 @@
 # pylint: disable=too-many-lines,no-member
 import abc
 from typing import Any, Dict, Literal, Optional, Type, TypeVar, Union
+import warnings
 
 from pydantic import ConfigDict, PositiveInt, field_validator, model_validator
 from pydantic.fields import Field
@@ -245,6 +246,27 @@ class QuantinuumConfig(BaseBackendConfig):
     max_cost: Optional[int] = None
     error_params: Optional[UserErrorParams] = None
 
+    @model_validator(mode="after")
+    def show_deprecation_warnings(self) -> Self:
+        """Warn about deprecated usage."""
+
+        if self.user_group is not None:
+            warnings.warn(
+                "'QuantinuumConfig.user_group' is deprecated and will be "
+                "removed in a future release. Please specify user_group in the execute job"
+                "submission parameters instead.",
+                DeprecationWarning,
+            )
+
+        if self.device_name.startswith("Helios"):
+            warnings.warn(
+                "QuantinuumConfig is deprecated for submission to Helios systems and support "
+                "will be removed in a future release. Please use HeliosConfig instead.",
+                DeprecationWarning,
+            )
+
+        return self
+
 
 class IBMQConfig(BaseBackendConfig):
     """Runs circuits on IBM's quantum devices."""
diff --git a/uv.lock b/uv.lock
index 1ab447f..8fd5b7d 100644
--- a/uv.lock
+++ b/uv.lock
@@ -833,7 +833,7 @@ wheels = [
 
 [[package]]
 name = "quantinuum-schemas"
-version = "7.2.0"
+version = "7.3.0"
 source = { editable = "." }
 dependencies = [
     { name = "orjson" },
@@ -868,7 +868,7 @@ dev = [
     { name = "pylint-pytest", specifier = ">=1.1.8" },
     { name = "pyright", specifier = ">=1.1.302" },
     { name = "pytest", specifier = ">=8.0.0,<9.0.0" },
-    { name = "pytest-cov", specifier = ">=5.0.0,<7.2.0" },
+    { name = "pytest-cov", specifier = ">=5.0.0,<7.3.0" },
     { name = "ruff", specifier = ">0.11" },
 ]