src/lai_automation/agent.py

@@ -28,10 +28,15 @@ Security and workflow rules:
   production data.
 
 Efficiency and completion rules:
+- A failure-report issue describes a product defect. Do not inspect or modify
+	failure-report transport code unless the reported problem explicitly concerns
+	report creation or delivery.
 - Implement only the endpoint or behavior explicitly requested. Do not expand a
 	fix to similar endpoints unless the issue requires it.
 - Preserve unrelated lines exactly. Do not reformat, rename, clean up, or correct
 	unrelated code while solving the issue.
+- Prefer adding a focused method to the closest existing test class over creating
+	another test file. Never declare a helper class name that already exists.
 - For every new join, inspect all key columns and cardinality. Prevent duplicate
 	base rows, and use only discriminator values established by the issue,
 	repository semantics, schema, or tests—never guess silently.

tests/test_agent.py

@@ -22,6 +22,8 @@ def test_task_uses_issue_text_not_github_parser() -> None:
 
 def test_system_prompt_requires_precise_diff_hygiene() -> None:
     assert "Never create backup files" in _SYSTEM_TEMPLATE
+    assert "failure-report transport code" in _SYSTEM_TEMPLATE
     assert "Preserve unrelated lines exactly" in _SYSTEM_TEMPLATE
+    assert "closest existing test class" in _SYSTEM_TEMPLATE
     assert "inspect all key columns and cardinality" in _SYSTEM_TEMPLATE
     assert "remove trailing spaces" in _SYSTEM_TEMPLATE