test(performance): enforce semantic artifact authority boundary (#19)

tests/test_portfolio_risk_contracts.py

@@ -952,6 +952,37 @@ def test_architecture_dependency_no_copy_and_authority_boundaries() -> None:
     assert not any(name.startswith(("research_results", "research_platform")) for name in imports)
     for candidate in ("riskfolio", "pyp", "skfolio", "cvxportfolio"):
         assert candidate not in source.lower()
+    artifact_source = (ROOT / "src" / "quant_engine" / "artifact.py").read_text(
+        encoding="utf-8"
+    )
+    artifact_tree = ast.parse(artifact_source)
+    forbidden_artifact_authority_symbols = {
+        "PortfolioDecision",
+        "RiskAssessment",
+        "build_portfolio_decision",
+        "assess_portfolio_risk",
+    }
+    artifact_imports = {
+        alias.name
+        for node in ast.walk(artifact_tree)
+        if isinstance(node, ast.Import)
+        for alias in node.names
+    } | {
+        node.module or ""
+        for node in ast.walk(artifact_tree)
+        if isinstance(node, ast.ImportFrom)
+    }
+    artifact_names = {
+        node.id for node in ast.walk(artifact_tree) if isinstance(node, ast.Name)
+    } | {
+        node.attr for node in ast.walk(artifact_tree) if isinstance(node, ast.Attribute)
+    }
+    assert "quant_engine.portfolio_risk_contracts" not in artifact_imports
+    assert not forbidden_artifact_authority_symbols & artifact_names
+    assert all(
+        token not in artifact_source
+        for token in {"portfolio_risk_contracts", *forbidden_artifact_authority_symbols}
+    )
     for owner_path in (
         ROOT / "src" / "quant_engine" / "governed_pipeline.py",
         ROOT / "src" / "quant_engine" / "artifact.py",
@@ -989,7 +1020,6 @@ def test_architecture_dependency_no_copy_and_authority_boundaries() -> None:
 def test_read_only_owner_dependency_lock_and_ci_hashes_match_baseline() -> None:
     expected = {
         "src/quant_engine/governed_pipeline.py": "3b334f340898db78ed869375ab532f156e8c1fee595a8318f544bebdd391049d",
-        "src/quant_engine/artifact.py": "e15feec412d3bfff10d8f21ca20813fc65cabc0703940371ed661896147bc379",
         "src/quant_engine/portfolio_construction.py": "e93d71da8d61b2047c19d4b99dace934a8cbc96d8d2b150ad62a9ceebd9163d4",
         "src/quant_engine/portfolio_decomp.py": "1a4f9f9aac2c46bf6ed2826d1b0d1723f06e3ce7c4b3f6479e098cbbd135bea6",
         "src/quant_engine/risk.py": "4a66c312d517d40f6f67bb71f438523e135645624ae78d49fa9c0fda2c02074e",