Markitect schema-validation integration use case and fixture for Markdown proxy documents

tests/test_core_architecture.py

@@ -12,6 +12,7 @@ from kontextual_engine.core import (
     MetadataFieldDefinition,
     MetadataRecord,
     MetadataSchema,
+    MetadataSchemaAssignment,
     MetadataValueType,
     OperationContext,
     PolicyDecision,
@@ -210,3 +211,25 @@ def test_metadata_schema_reports_structured_validation_issues() -> None:
     assert schema.applies_to(Classification(asset_type="document")) is True
     assert schema.applies_to(Classification(asset_type="dataset")) is False
     assert MetadataSchema.from_dict(schema.to_dict()).fields[0].value_type == MetadataValueType.STRING
+
+
+def test_metadata_schema_assignment_matches_classification_and_roundtrips() -> None:
+    assignment = MetadataSchemaAssignment(
+        assignment_id="assignment-documents",
+        schema_id="schema-document-v1",
+        asset_types=("document",),
+        sensitivities=(Sensitivity.INTERNAL,),
+        lifecycle_states=(LifecycleState.ACTIVE,),
+        policy_ref="local://policy/document-metadata",
+    )
+
+    assert assignment.applies_to(
+        Classification(asset_type="document", sensitivity=Sensitivity.INTERNAL)
+    ) is True
+    assert assignment.applies_to(
+        Classification(asset_type="document", sensitivity=Sensitivity.CONFIDENTIAL)
+    ) is False
+    assert (
+        MetadataSchemaAssignment.from_dict(assignment.to_dict()).policy_ref
+        == "local://policy/document-metadata"
+    )