metadata schema validation

src/kontextual_engine/services/asset_service.py

@@ -17,6 +17,7 @@ from kontextual_engine.core import (
     LifecycleState,
     mapping_digest,
     MetadataRecord,
+    MetadataSchema,
     OperationContext,
     PolicyDecision,
     RelationshipTargetKind,
@@ -49,9 +50,11 @@ class AssetRegistryService:
         repository: AssetRegistryRepository,
         *,
         policy_gateway: PolicyGateway | None = None,
+        metadata_schemas: list[MetadataSchema] | tuple[MetadataSchema, ...] | None = None,
     ) -> None:
         self.repository = repository
         self.policy_gateway = policy_gateway or AllowAllPolicyGateway()
+        self.metadata_schemas = tuple(metadata_schemas or ())
 
     def create_asset(
         self,
@@ -79,6 +82,7 @@ class AssetRegistryService:
             existing = self._idempotent_lookup("asset.create", idempotency_key, request_hash)
             if existing:
                 return self._asset_change_from_idempotency(existing)
+        self._validate_metadata_records(classification, list(metadata_records or []))
 
         asset = KnowledgeAsset.create(
             title,
@@ -145,6 +149,10 @@ class AssetRegistryService:
         asset = self.repository.get_asset(asset_id)
         decision = self._authorize(context, "asset.metadata.add", f"asset:{asset.id}")
         next_sequence = self._next_sequence(asset.id)
+        self._validate_metadata_records(
+            asset.classification,
+            self.repository.list_metadata_records(asset.id) + [record],
+        )
         self.repository.save_metadata_record(asset.id, record)
         version = AssetVersion(
             asset_id=asset.id,
@@ -404,6 +412,15 @@ class AssetRegistryService:
         versions = self.repository.list_versions(asset_id)
         return len(versions) + 1
 
+    def _validate_metadata_records(
+        self,
+        classification: Classification,
+        records: list[MetadataRecord],
+    ) -> None:
+        for schema in self.metadata_schemas:
+            if schema.applies_to(classification):
+                schema.validate_or_raise(records)
+
     def _idempotent_lookup(
         self,
         operation: str,