From 24a0f7b0320d14c66c6f5ceef02d02d408778f80 Mon Sep 17 00:00:00 2001
From: Ravi Tharuma <RaviTharuma@users.noreply.github.com>
Date: Mon, 16 Mar 2026 13:04:14 +0100
Subject: [PATCH] fix(runtime-fallback): extract status code from nested AI SDK
 errors

AI SDK wraps HTTP status codes inside error.error.statusCode (e.g., AI_APICallError). The current extractStatusCode only checks the top level, missing these nested codes.

This caused runtime-fallback to skip retryable errors like 400, 500, 504 because it couldn't find the status code.

Fixes #2617
---
 src/hooks/runtime-fallback/error-classifier.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hooks/runtime-fallback/error-classifier.ts b/src/hooks/runtime-fallback/error-classifier.ts
index c20aa8979..512ba734d 100644
--- a/src/hooks/runtime-fallback/error-classifier.ts
+++ b/src/hooks/runtime-fallback/error-classifier.ts
@@ -33,7 +33,7 @@ export function extractStatusCode(error: unknown, retryOnErrors?: number[]): num
 
   const errorObj = error as Record<string, unknown>
 
-  const statusCode = errorObj.statusCode ?? errorObj.status ?? (errorObj.data as Record<string, unknown>)?.statusCode
+  const statusCode = errorObj.statusCode ?? errorObj.status ?? (errorObj.data as Record<string, unknown>)?.statusCode ?? (errorObj.error as Record<string, unknown>)?.statusCode ?? (errorObj.cause as Record<string, unknown>)?.statusCode
   if (typeof statusCode === "number") {
     return statusCode
   }