Bugfix: a fenced block hides every other sentence in its paragraph

engine/hooks/diu-stop/claude_stop_check.py

@@ -68,6 +68,7 @@
 FENCE_MARKER = "```"
 FENCED_BODY_RE = re.compile(r"```[^\n]*\n(.*?)```", re.DOTALL)
 INLINE_CODE_RE = re.compile(r"`([^`\n]+)`")
+FILE_LINE_RE = re.compile(r"(?<![\w/.-])(?:[\w.-]+/)*[\w-]+\.[A-Za-z]\w*(?::\d+\b|#L\d+\b)")
 OUTPUT_SHAPE_RE = re.compile(
     r"^(?:\$ |> |\+\+\+ |--- |@@ |diff --git|commit [0-9a-f]{7,}|[0-9a-f]{7,10} )"
     r"|Traceback|^\s*at [\w.$<>]+ \(.*:\d+:\d+\)"
@@ -143,10 +144,15 @@ def find_unverified_claim(message):
     truth check."""
     fenced_output = any(OUTPUT_SHAPE_RE.search(body) for body in FENCED_BODY_RE.findall(message))
     for para in re.split(r"\n\s*\n", message):
+        para = FENCED_BODY_RE.sub("", para)
+        if not para.strip():
+            continue
         if FENCE_MARKER in para:
             continue
         if markers.excuses_paragraph(para):
             continue
+        if FILE_LINE_RE.search(para):
+            continue
         inline = INLINE_CODE_RE.findall(para)
         if inline and (fenced_output or any(OUTPUT_SHAPE_RE.search(code) for code in inline)):
             continue

engine/hooks/diu-stop/tests/test_hooks.py

@@ -305,6 +305,31 @@ def test_unrelated_later_backtick_does_not_suppress_causal_claim(self):
         self.assertTrue(blocked)
         self.assertIn("unverified-shaped claim", err.lower())
 
+    def test_fenced_block_does_not_silence_later_prose_in_same_paragraph(self):
+        message = (
+            "I checked the local snippet.\n"
+            "```text\n"
+            "unrelated fenced content\n"
+            "```\n"
+            "This fixes it now."
+        )
+        blocked, err = run_claude_check({"last_assistant_message": message})
+        self.assertTrue(blocked)
+        self.assertIn("this fixes it", err.lower())
+
+    def test_file_line_citation_still_silences_claim_after_fence_normalization(self):
+        message = (
+            "I checked the relevant snippet.\n"
+            "```ts\n"
+            "const guard = true;\n"
+            "```\n"
+            "The issue was the stale guard at file.ts:1276."
+        )
+        self.assertIsNone(claude_stop_check.find_unverified_claim(message))
+        blocked, err = run_claude_check({"last_assistant_message": message})
+        self.assertFalse(blocked)
+        self.assertEqual(err, "")
+
     def test_hedge_i_think_it_happened_without_evidence_is_flagged(self):
         message = "I think the deploy happened around 2am, so that's why the build is stale."
         blocked, err = run_claude_check({"last_assistant_message": message})