diff --git a/tests/test_baseline_result.py b/tests/test_baseline_result.py
index c4dbdb0b..62054512 100644
--- a/tests/test_baseline_result.py
+++ b/tests/test_baseline_result.py
@@ -329,3 +329,34 @@ def test_phase9_modules_import_cleanly():
  assert hasattr(src.ai_client, "_classify_deepseek_error")
  assert hasattr(src.ai_client, "_classify_minimax_error")
  assert hasattr(src.ai_client, "set_provider")
+
+
+# ============ Phase 9 redo tests (TIER1_REVIEW, 4 sites) ============
+
+def test_phase9_redo_ai_client_unclear_zero():
+ """After Phase 9 redo per TIER1_REVIEW:
+   - L332, L355 refactored to return ErrorInfo (BOUNDARY_CONVERSION)
+   - L394, L716, L723, L994 migrated to Result[T]
+   UNCLEAR should be 0.
+ """
+ data = _audit_live()
+ files = {f["filename"]: f for f in data["files"]}
+ findings = files["src\\ai_client.py"]["findings"]
+ unclear = sum(1 for f in findings if f["category"] == "UNCLEAR")
+ assert unclear == 0, f"expected ai_client UNCLEAR=0 after Phase 9 redo, got {unclear}"
+
+
+def test_phase9_redo_new_helpers_exist():
+ """The new _result helpers added in Phase 9 redo must exist on ai_client."""
+ import src.ai_client
+ assert hasattr(src.ai_client, "_set_minimax_provider_result")
+ assert hasattr(src.ai_client, "_parse_tool_args_result")
+ assert hasattr(src.ai_client, "_reread_file_items_result")
+
+
+def test_phase9_redo_modules_import_cleanly():
+ """Verify ai_client imports after Phase 9 redo migrations."""
+ import src.ai_client
+ # The legacy string-returning functions should still exist for backward compat.
+ assert callable(getattr(src.ai_client, "set_provider", None))
+ assert callable(getattr(src.ai_client, "_reread_file_items", None))