diff --git a/internal/llm/provider/anthropic.go b/internal/llm/provider/anthropic.go
index 11c131c6cbc0919e9847c1820740b81cccf7f781..636257565caf91fc4f7f81af20a6e742aadbd3ee 100644
--- a/internal/llm/provider/anthropic.go
+++ b/internal/llm/provider/anthropic.go
@@ -507,6 +507,7 @@ func (a *anthropicClient) shouldRetry(attempts int, err error) (bool, int64, err
 	}
 
 	isOverloaded := strings.Contains(apiErr.Error(), "overloaded") || strings.Contains(apiErr.Error(), "rate limit exceeded")
+	// 529 (unofficial): The service is overloaded
 	if apiErr.StatusCode != http.StatusTooManyRequests && apiErr.StatusCode != 529 && !isOverloaded {
 		return false, 0, err
 	}