test contracts

backend/src/core/task_manager/persistence.py

@@ -24,6 +24,20 @@ from ..logger import logger, belief_scope
 # @SEMANTICS: persistence, service, database, sqlalchemy
 # @PURPOSE: Provides methods to save and load tasks from the tasks.db database using SQLAlchemy.
 # @INVARIANT: Persistence must handle potentially missing task fields natively.
+#
+# @TEST_CONTRACT: TaskPersistenceService ->
+# {
+#   required_fields: {},
+#   invariants: [
+#       "persist_task creates or updates a record",
+#       "load_tasks retrieves valid Task instances",
+#       "delete_tasks correctly removes records from the database"
+#   ]
+# }
+# @TEST_FIXTURE: valid_task_persistence -> {"task_id": "123", "status": "PENDING"}
+# @TEST_EDGE: persist_invalid_task_type -> raises Exception
+# @TEST_EDGE: load_corrupt_json_params -> handled gracefully
+# @TEST_INVARIANT: accurate_round_trip -> verifies: [valid_task_persistence, load_corrupt_json_params]
 class TaskPersistenceService:
     # [DEF:_json_load_if_needed:Function]
     # @PURPOSE: Safely load JSON strings from DB if necessary
@@ -245,6 +259,19 @@ class TaskPersistenceService:
 # @TIER: CRITICAL
 # @RELATION: DEPENDS_ON -> TaskLogRecord
 # @INVARIANT: Log entries are batch-inserted for performance.
+#
+# @TEST_CONTRACT: TaskLogPersistenceService ->
+# {
+#   required_fields: {},
+#   invariants: [
+#       "add_logs efficiently saves logs to the database",
+#       "get_logs retrieves properly filtered LogEntry objects"
+#   ]
+# }
+# @TEST_FIXTURE: valid_log_batch -> {"task_id": "123", "logs": [{"level": "INFO", "message": "msg"}]}
+# @TEST_EDGE: empty_log_list -> no-op behavior
+# @TEST_EDGE: add_logs_db_error -> rollback and log error
+# @TEST_INVARIANT: accurate_log_aggregation -> verifies: [valid_log_batch]
 class TaskLogPersistenceService:
     """
     Service for persisting and querying task logs.