diff --git a/src/frameforge/semantic.py b/src/frameforge/semantic.py
index f570774..f07a899 100644
--- a/src/frameforge/semantic.py
+++ b/src/frameforge/semantic.py
@@ -17,9 +17,22 @@ def evaluate(root, rule):
             continue
         # Comment filtering is intentionally conservative; not a language parser.
         language = rule["language"]
-        pattern = (r'//[^\n]*|/\*[\s\S]*?\*/' if language == "csharp"
-                   else r'--\[\[[\s\S]*?\]\]|--[^\n]*')
-        source = re.sub(pattern, lambda m: re.sub(r'[^\n]', ' ', m.group()), source)
+        if language == "csharp":
+            pattern = re.compile(
+                r'(?P<string>@"(?:""|[^"])*"|"(?:\\.|[^"\\])*"|\'(?:\\.|[^\'\\])*\')'
+                r'|(?P<comment>//[^\n]*|/\*[\s\S]*?\*/)'
+            )
+        else:
+            pattern = re.compile(
+                r'(?P<long_string>\[(?P<eq>=*)\[[\s\S]*?\](?P=eq)\])'
+                r'|(?P<string>"(?:\\.|[^"\\])*"|\'(?:\\.|[^\'\\])*\')'
+                r'|(?P<comment>--\[(?P<comment_eq>=*)\[[\s\S]*?\](?P=comment_eq)\]|--[^\n]*)'
+            )
+        source = pattern.sub(
+            lambda match: re.sub(r'[^\n]', ' ', match.group())
+            if match.group("comment") else match.group(),
+            source,
+        )
         sources.append((relative, source))
 
     if not sources:
diff --git a/tests/test_semantic.py b/tests/test_semantic.py
index f9cc3fb..d33487e 100644
--- a/tests/test_semantic.py
+++ b/tests/test_semantic.py
@@ -22,6 +22,31 @@ def test_positive_negative_and_comments(self):
             f.write_text("Event += OnEvent;\nEvent -= OnEvent;")
             self.assertEqual(evaluate(root,rule())["status"],"pattern_observed_control_flow_unverified")
 
+    def test_csharp_comment_markers_inside_strings_do_not_hide_code(self):
+        with tempfile.TemporaryDirectory() as d:
+            root = Path(d)
+            f = root/"Root.cs"
+            f.write_text('var url = "https://example.com"; Event += OnEvent; // Event -= OnEvent;\n')
+            result = evaluate(root, rule(["Root.cs"]))
+            self.assertEqual(result["status"], "review_needed")
+            self.assertEqual([item["token"] for item in result["evidence"]], ["Event += OnEvent;"])
+            self.assertEqual(result["missing_tokens"], ["Event -= OnEvent;"])
+
+    def test_lua_comment_markers_inside_strings_do_not_hide_code(self):
+        with tempfile.TemporaryDirectory() as d:
+            root = Path(d)
+            f = root/"transaction.lua"
+            f.write_text('local marker = "-- not a comment"; query(db, "COMMIT") -- query(db, "ROLLBACK")\n')
+            value = {
+                "plugin_id": "skynet", "id": "transaction", "topic": "transaction",
+                "recommendation": "review recovery", "language": "lua",
+                "paths": ["transaction.lua"], "tokens": ['"COMMIT"', '"ROLLBACK"'],
+            }
+            result = evaluate(root, value)
+            self.assertEqual(result["status"], "review_needed")
+            self.assertEqual([item["token"] for item in result["evidence"]], ['"COMMIT"'])
+            self.assertEqual(result["missing_tokens"], ['"ROLLBACK"'])
+
     def test_relocation_and_absence(self):
         with tempfile.TemporaryDirectory() as d:
             root=Path(d)