test(workspace): harden release gate automation

skills/test/test_agent_run_ledger_policy.py

@@ -0,0 +1,69 @@
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "scripts" / "e2e"))
+
+from agent_run_ledger_policy import (  # noqa: E402
+    classify_invalid_tool_argument_errors,
+    load_ledger_json,
+)
+
+
+class AgentRunLedgerPolicyTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.event = {
+            "sequence": 10,
+            "type": "tool.call.completed",
+            "signal": "Invalid JSON arguments",
+        }
+
+    def test_completed_run_with_later_success_is_warning(self) -> None:
+        failures, warnings = classify_invalid_tool_argument_errors(
+            [self.event],
+            successful_tool_completion_sequences=[12],
+            run_completed=True,
+        )
+
+        self.assertEqual(failures, [])
+        self.assertEqual(warnings[0]["kind"], "recovered_tool_argument_error")
+
+    def test_completed_run_without_later_success_still_fails(self) -> None:
+        failures, warnings = classify_invalid_tool_argument_errors(
+            [self.event],
+            successful_tool_completion_sequences=[8],
+            run_completed=True,
+        )
+
+        self.assertEqual(failures, [self.event])
+        self.assertEqual(warnings, [])
+
+    def test_incomplete_run_still_fails_even_with_later_success(self) -> None:
+        failures, warnings = classify_invalid_tool_argument_errors(
+            [self.event],
+            successful_tool_completion_sequences=[12],
+            run_completed=False,
+        )
+
+        self.assertEqual(failures, [self.event])
+        self.assertEqual(warnings, [])
+
+    def test_malformed_persisted_event_json_remains_an_invariant_failure(self) -> None:
+        failures: list[dict] = []
+
+        value = load_ledger_json(
+            '{"tool_call_id":',
+            field="agent_run_event[10].data_json",
+            failures=failures,
+        )
+
+        self.assertEqual(value, {})
+        self.assertEqual(failures[0]["kind"], "invalid_json")
+        self.assertEqual(failures[0]["field"], "agent_run_event[10].data_json")
+
+
+if __name__ == "__main__":
+    unittest.main()