fix

apps/api/internal/processing/openai_test.go

@@ -179,6 +179,52 @@ func TestOpenAIClient_doComplete_emptyContentWithReasoningJSON(t *testing.T) {
 	}
 }
 
+func TestOpenAIClient_doComplete_gpt56LunaUsesMaxCompletionTokens(t *testing.T) {
+	t.Parallel()
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var req map[string]any
+		_ = json.NewDecoder(r.Body).Decode(&req)
+		if _, ok := req["temperature"]; ok {
+			t.Errorf("temperature must be omitted for gpt-5.6-luna")
+		}
+		if _, ok := req["max_tokens"]; ok {
+			t.Errorf("max_tokens must be omitted for gpt-5.6-luna")
+		}
+		gotMax, _ := req["max_completion_tokens"].(float64)
+		if int(gotMax) != MaxTokensEnhance {
+			t.Errorf("max_completion_tokens=%v want %d", gotMax, MaxTokensEnhance)
+		}
+		if req["reasoning_effort"] != "low" {
+			t.Errorf("reasoning_effort=%v want low", req["reasoning_effort"])
+		}
+		_ = json.NewEncoder(w).Encode(map[string]any{
+			"model": "gpt-5.6-luna",
+			"choices": []map[string]any{{
+				"finish_reason": "stop",
+				"message": map[string]any{
+					"role":    "assistant",
+					"content": `{"name":"Acme Monitor","description":"<h1>Acme Monitor</h1><p>IPS panel for office use.</p>"}`,
+				},
+			}},
+			"usage": map[string]int{"prompt_tokens": 20, "completion_tokens": 40, "total_tokens": 60},
+		})
+	}))
+	defer srv.Close()
+	c := NewOpenAIClient("test-key", srv.URL, "gpt-5.6-luna", 0, 1)
+	c.HTTPClient = srv.Client()
+	comp, err := c.CompleteWithOptions(context.Background(), "sys", "user", CompleteOptions{
+		MaxTokens:       MaxTokensEnhance,
+		Temperature:     DefaultStructuredTemp,
+		ReasoningEffort: "low",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(comp.Text, "Acme Monitor") {
+		t.Fatalf("text=%q", comp.Text)
+	}
+}
+
 func TestOpenAIClient_doComplete_emptyContentLengthRetriesWithBudget(t *testing.T) {
 	t.Parallel()
 	calls := 0