ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

tests/test_ch9_verifier_string_expression_issues.py

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+import sys
+import os
+
+sys.path.insert(0, os.path.abspath("chapter9/trajectory-verifier"))
+
+from verifier import HeuristicQualityJudge, FAIL
+
+
+def test_heuristic_quality_judge_string_expression_issues():
+    """Contract: HeuristicQualityJudge supports string items in quality_facts.expression_issues without throwing AttributeError."""
+    judge = HeuristicQualityJudge()
+
+    trajectory = {
+        "quality_facts": {
+            "expression_issues": [
+                "Redundant response",
+                "Overly verbose explanation",
+                {"turn": 2, "issue": "Repetitive phrasing"},
+            ]
+        }
+    }
+
+    results = judge.evaluate(trajectory)
+    assert len(results) == 2
+
+    expression_res = next(r for r in results if r.dimension == "expression_quality")
+    assert expression_res.verdict == FAIL
+    assert expression_res.score == 0.0
+    assert expression_res.evidence == [
+        "Redundant response",
+        "Overly verbose explanation",
+        "turn 2: Repetitive phrasing",
+    ]