fix: decode repeated source layout escapes

agent_platform/runtime/loop.py

@@ -257,19 +257,22 @@ def decode_code_layout_escapes(content: str) -> str:
             index += 1
             continue
 
-        if content.startswith("\\r\\n", index):
+        escaped_crlf = re.match(r"\\+r\\+n", content[index:])
+        if escaped_crlf:
             output.append("\n")
-            index += 4
+            index += len(escaped_crlf.group(0))
             line_comment = False
             continue
-        if content.startswith("\\n", index):
+        escaped_newline = re.match(r"\\+n", content[index:])
+        if escaped_newline:
             output.append("\n")
-            index += 2
+            index += len(escaped_newline.group(0))
             line_comment = False
             continue
-        if content.startswith("\\t", index):
+        escaped_tab = re.match(r"\\+t", content[index:])
+        if escaped_tab:
             output.append("\t")
-            index += 2
+            index += len(escaped_tab.group(0))
             continue
         if line_comment:
             if content[index] == "\n":
@@ -297,13 +300,15 @@ def decode_code_layout_escapes(content: str) -> str:
 
 def normalize_write_file_content(path: str, content: str) -> str:
     literal_newlines = content.count("\\n") + content.count("\\r\\n")
-    actual_newlines = content.count("\n")
-    if literal_newlines < 2 or literal_newlines <= max(2, actual_newlines * 2):
+    if literal_newlines < 2:
         return content
     suffix = PurePosixPath(path).suffix.lower()
     if suffix in CODE_FILE_SUFFIXES:
         return decode_code_layout_escapes(content)
     if suffix in PLAIN_TEXT_FILE_SUFFIXES:
+        actual_newlines = content.count("\n")
+        if literal_newlines <= max(2, actual_newlines * 2):
+            return content
         return content.replace("\\r\\n", "\n").replace("\\n", "\n").replace("\\t", "\t")
     return content