fix(vision): add Xiaomi MiMo 'text is not set' to image rejection phrases

agent/conversation_loop.py

@@ -1981,6 +1981,10 @@ def _stop_spinner():
                     # "unknown variant `image_url`, expected `text`".
                     "unknown variant `image_url`, expected `text`",
                     "unknown variant image_url, expected text",
+                    # Xiaomi MiMo: rejects requests where text content part is missing
+                    "text is not set",
+                    # Xiaomi MiMo variant with backticks around text
+                    "`text` is not set",
                 )
                 _err_lower = _err_body.lower()
                 _looks_like_image_rejection = any(

gateway/platforms/weixin.py

@@ -1388,10 +1388,12 @@ async def _process_message(self, message: Dict[str, Any]) -> None:
         if message_id and self._dedup.is_duplicate(message_id):
             return
 
-        # Secondary content-fingerprint dedup for text messages
+        # Secondary content-fingerprint dedup for text messages.
+        # Commands (prefixed with /) are always processed — deduplicating them
+        # silently drops intentionally-repeated slash commands like /approve.
         item_list = message.get("item_list") or []
         text = _extract_text(item_list)
-        if text:
+        if text and not text.strip().startswith("/"):
             content_key = f"content:{sender_id}:{hashlib.md5(text.encode()).hexdigest()}"
             if self._dedup.is_duplicate(content_key):
                 logger.debug("[%s] Content-dedup: skipping duplicate message from %s", self.name, sender_id)

tests/run_agent/test_image_rejection_fallback.py

@@ -195,6 +195,9 @@ class TestImageRejectionPhraseIsolation:
         "does not support vision",
         "model does not support image",
         "image_url'. expected",
+        # Xiaomi MiMo: rejects requests where text content part is missing
+        "text is not set",
+        "`text` is not set",
     )
 
     def _matches(self, body: str) -> bool:
@@ -265,3 +268,14 @@ def test_codex_data_url_rejection_does_not_false_match_other_url_errors(self):
         ]
         for body in bodies:
             assert self._matches(body) is False, f"false positive on: {body}"
+
+    def test_mimo_text_is_not_set_trips(self):
+        """Xiaomi MiMo 'text is not set' — model requires text content part
+        but the request only has image_url parts. Should trigger image
+        rejection recovery (strip all images from user messages)."""
+        bodies = [
+            "Error code: 400 - {'error': {'code': '400', 'message': 'Param Incorrect', 'param': 'text is not set', 'type': ''}}",
+            "{'error': {'code': '400', 'message': 'Param Incorrect', 'param': '`text` is not set', 'type': ''}}",
+        ]
+        for body in bodies:
+            assert self._matches(body) is True, f"false negative on: {body}"