fix: add CJK false positive filtering for question detection

scripts/lib/reflect_utils.py

@@ -485,7 +485,8 @@ def backup_timestamp() -> str:
 # Structural patterns indicating FALSE POSITIVES (language-agnostic)
 # These focus on MESSAGE STRUCTURE rather than specific words
 FALSE_POSITIVE_PATTERNS = [
-    r"\?$",  # Ends with question mark → question, not correction
+    r"[?\uff1f]$",  # Ends with question mark (ASCII ? or full-width ？)
+    r"[嗎吗呢か까]$",  # Ends with CJK question particle
     r"^(please|can you|could you|would you|help me)\b",  # Task request openers
     r"(help|fix|check|review|figure out|set up)\s+(this|that|it|the)\b",  # Task verbs
     r"(error|failed|could not|cannot|can't|unable to)\s+\w+",  # Error descriptions
@@ -524,6 +525,10 @@ def detect_patterns(text: str) -> Tuple[Optional[str], str, float, str, int]:
         if re.search(pattern, text, re.IGNORECASE):
             return ("explicit", name, confidence, "correction", decay)
 
+    # Too short to be actionable (e.g. "OK", "好")
+    if len(text.strip()) <= 4:
+        return (None, "", 0.0, "correction", 90)
+
     # Check for guardrail patterns - "don't do X unless" constraints
     # These are high-confidence corrections about unwanted behavior
     for pattern, name, confidence, decay in GUARDRAIL_PATTERNS:

tests/test_reflect_utils.py

@@ -315,6 +315,24 @@ def test_long_message_confidence_reduced(self):
         if item_type == "auto":
             self.assertLessEqual(confidence, 0.65)
 
+    def test_short_message_rejected(self):
+        """Test that very short messages (<=4 chars) are rejected."""
+        result = detect_patterns("OK")
+        self.assertIsNone(result[0])
+
+        result = detect_patterns("好")
+        self.assertIsNone(result[0])
+
+    def test_cjk_question_particle_rejected(self):
+        """Test that messages ending with CJK question particles are rejected."""
+        result = detect_patterns("這是什麼嗎")
+        self.assertIsNone(result[0])
+
+    def test_fullwidth_question_mark_rejected(self):
+        """Test that full-width question marks are rejected."""
+        result = detect_patterns("這是什麼？")
+        self.assertIsNone(result[0])
+
 
 class TestQueueItemCreation(unittest.TestCase):
     """Tests for queue item creation."""