fix

apps/api/internal/processing/openai_api_error_test.go

@@ -47,6 +47,23 @@ func TestFormatOpenAIHTTPError_preservesUsefulHints(t *testing.T) {
 			},
 			want: "model rejects legacy token cap",
 		},
+		{
+			status: 429,
+			err: &openAIErrorBody{
+				Message: "You exceeded your current quota, please check your plan and billing details.",
+				Type:    "insufficient_quota",
+				Code:    "insufficient_quota",
+			},
+			want: "API billing/quota empty",
+		},
+		{
+			status: 429,
+			err: &openAIErrorBody{
+				Message: "Rate limit reached for requests",
+				Code:    "rate_limit_exceeded",
+			},
+			want: "AI provider rate limited",
+		},
 		{
 			status: 401,
 			err: &openAIErrorBody{
@@ -81,6 +98,19 @@ func TestFormatOpenAIHTTPError_preservesUsefulHints(t *testing.T) {
 	}
 }
 
+func TestOpenAIErrorIsRetryableRateLimit(t *testing.T) {
+	t.Parallel()
+	if openAIErrorIsRetryableRateLimit(&openAIErrorBody{Code: "insufficient_quota", Type: "insufficient_quota"}) {
+		t.Fatal("quota must not retry")
+	}
+	if !openAIErrorIsRetryableRateLimit(&openAIErrorBody{Code: "rate_limit_exceeded"}) {
+		t.Fatal("true rate limit should retry")
+	}
+	if openAIErrorIsRetryableRateLimit(nil) {
+		t.Fatal("nil 429 body must not auto-retry")
+	}
+}
+
 func TestProbeCompleteOptions(t *testing.T) {
 	t.Parallel()
 	opts := ProbeCompleteOptions()