fix: stabilize rectification staging release

tests/test_mcp_dependency_contract.py

@@ -0,0 +1,17 @@
+import tomllib
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+MCP_REQUIREMENT = "mcp>=1.0,<2"
+
+
+def test_mcp_dependency_stays_on_compatible_major_version() -> None:
+    requirements = {
+        line.strip()
+        for line in (ROOT / "requirements.txt").read_text(encoding="utf-8").splitlines()
+        if line.strip() and not line.lstrip().startswith("#")
+    }
+    project = tomllib.loads((ROOT / "pyproject.toml").read_text(encoding="utf-8"))
+
+    assert MCP_REQUIREMENT in requirements
+    assert MCP_REQUIREMENT in project["project"]["optional-dependencies"]["api"]