From 8b0ab9ddb257c991ce607670b90f599e14aaaba8 Mon Sep 17 00:00:00 2001
From: Ian <ian@usestrix.com>
Date: Wed, 7 Oct 2026 16:48:45 -0400
Subject: [PATCH] fix(execution): match DeepSeek's image rejection

---
 strix/core/execution.py                 | 3 ++-
 tests/test_execution_transient_retry.py | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/strix/core/execution.py b/strix/core/execution.py
index a0b81490..c6af2263 100644
--- a/strix/core/execution.py
+++ b/strix/core/execution.py
@@ -65,7 +65,8 @@ _IMAGE_REJECTION = re.compile(
     r"|image_url is only supported by certain models"  # OpenAI
     r"|is not a multimodal model|at most 0 image\(s\)"  # vLLM
     r"|does not support image input"  # LiteLLM's Fireworks check
-    r"|doesn't support the image field",  # Bedrock Converse
+    r"|doesn't support the image field"  # Bedrock Converse
+    r"|unknown variant `image_url`",  # DeepSeek, e.g. via Vercel AI Gateway
     re.IGNORECASE,
 )
 _MAX_COMPACTIONS_PER_CYCLE = 2
diff --git a/tests/test_execution_transient_retry.py b/tests/test_execution_transient_retry.py
index fa9f13c5..f175e1e9 100644
--- a/tests/test_execution_transient_retry.py
+++ b/tests/test_execution_transient_retry.py
@@ -188,6 +188,7 @@ async def test_run_cycle_does_not_retry_permanent_error(
         (400, "Invalid content type. image_url is only supported by certain models.", True),
         (400, "my-model is not a multimodal model", True),
         (400, "This model doesn't support the image field for user messages.", True),
+        (422, "messages[3]: unknown variant `image_url`, expected `text`", True),
         (
             400,
             "OpenRouterException: Message: This model's maximum context length is 1048576 "