Fix responses-format handling for chat completions

internal/translator/codex/openai/chat-completions/compat_test.go

@@ -0,0 +1,43 @@
+package chat_completions
+
+import (
+	"os"
+	"strings"
+	"testing"
+
+	responsesconverter "github.com/router-for-me/CLIProxyAPI/v6/internal/translator/openai/openai/responses"
+	"github.com/tidwall/gjson"
+)
+
+func TestResponsesPayloadToolsArePreserved(t *testing.T) {
+	data, err := os.ReadFile("../../../../../error1.log")
+	if err != nil {
+		t.Fatalf("read log: %v", err)
+	}
+
+	var requestLine string
+	for _, line := range strings.Split(string(data), "\n") {
+		trimmed := strings.TrimSpace(line)
+		if strings.HasPrefix(trimmed, "{\"user\"") {
+			requestLine = trimmed
+			break
+		}
+	}
+	if requestLine == "" {
+		t.Fatalf("failed to extract request body from log")
+	}
+
+	raw := []byte(requestLine)
+	chatPayload := responsesconverter.ConvertOpenAIResponsesRequestToOpenAIChatCompletions("gpt-5.1-codex-max(xhigh)", raw, true)
+	codexPayload := ConvertOpenAIRequestToCodex("gpt-5.1-codex-max(xhigh)", chatPayload, true)
+
+	tools := gjson.GetBytes(codexPayload, "tools")
+	if !tools.IsArray() || len(tools.Array()) == 0 {
+		t.Fatalf("expected tools array, got: %s", tools.Raw)
+	}
+	for i, tool := range tools.Array() {
+		if name := strings.TrimSpace(tool.Get("name").String()); name == "" {
+			t.Fatalf("tool %d missing name after conversion: %s", i, tool.Raw)
+		}
+	}
+}