From 4aa0a7c195376aa90e9948e71bc24748c805da17 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=98=BF=E6=B3=A5=E8=B1=86?= <1243352777@qq.com>
Date: Tue, 28 Apr 2026 10:18:56 +0800
Subject: [PATCH] fix(error-classifier): add insufficient balance to billing
 patterns

DeepSeek API returns HTTP 400 with 'Insufficient Balance' message when
account funds are depleted. This pattern was not in _BILLING_PATTERNS,
causing the error to be misclassified instead of triggering billing
exhaustion handling (e.g., fallback to alternate provider).

Suggested by teknium1 in PR review of #15586.
---
 agent/error_classifier.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/agent/error_classifier.py b/agent/error_classifier.py
index 0780bde90..511ab353c 100644
--- a/agent/error_classifier.py
+++ b/agent/error_classifier.py
@@ -91,6 +91,7 @@ class ClassifiedError:
 _BILLING_PATTERNS = [
     "insufficient credits",
     "insufficient_quota",
+    "insufficient balance",
     "credit balance",
     "credits have been exhausted",
     "top up your credits",