feat: Hide raw tool call JSON from output_text in OpenAI-style responses when structured tool calls are present.

internal/adapter/openai/responses_stream_test.go

@@ -10,7 +10,59 @@ import (
 	"testing"
 )
 
-func TestHandleResponsesStreamNoDuplicateTailInCompletedOutputText(t *testing.T) {
+func TestHandleResponsesStreamToolCallsHideRawOutputTextInCompleted(t *testing.T) {
+	h := &Handler{}
+	req := httptest.NewRequest(http.MethodPost, "/v1/responses", nil)
+	rec := httptest.NewRecorder()
+
+	sseLine := func(v string) string {
+		b, _ := json.Marshal(map[string]any{
+			"p": "response/content",
+			"v": v,
+		})
+		return "data: " + string(b) + "\n"
+	}
+
+	rawToolJSON := `{"tool_calls":[{"name":"read_file","input":{"path":"README.MD"}}]}`
+	streamBody := sseLine(rawToolJSON) + "data: [DONE]\n"
+	resp := &http.Response{
+		StatusCode: http.StatusOK,
+		Body:       io.NopCloser(strings.NewReader(streamBody)),
+	}
+
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-chat", "prompt", false, false, []string{"read_file"})
+
+	completed, ok := extractSSEEventPayload(rec.Body.String(), "response.completed")
+	if !ok {
+		t.Fatalf("expected response.completed event, body=%s", rec.Body.String())
+	}
+	responseObj, _ := completed["response"].(map[string]any)
+	outputText, _ := responseObj["output_text"].(string)
+	if outputText != "" {
+		t.Fatalf("expected empty output_text for tool_calls response, got output_text=%q", outputText)
+	}
+	output, _ := responseObj["output"].([]any)
+	if len(output) == 0 {
+		t.Fatalf("expected structured output entries, got %#v", responseObj["output"])
+	}
+	first, _ := output[0].(map[string]any)
+	if first["type"] != "tool_calls" {
+		t.Fatalf("expected first output type tool_calls, got %#v", first["type"])
+	}
+	toolCalls, _ := first["tool_calls"].([]any)
+	if len(toolCalls) == 0 {
+		t.Fatalf("expected at least one tool_call in output, got %#v", first["tool_calls"])
+	}
+	call0, _ := toolCalls[0].(map[string]any)
+	if call0["name"] != "read_file" {
+		t.Fatalf("unexpected tool call name: %#v", call0["name"])
+	}
+	if strings.Contains(outputText, `"tool_calls"`) {
+		t.Fatalf("raw tool_calls JSON leaked in output_text: %q", outputText)
+	}
+}
+
+func TestHandleResponsesStreamIncompleteTailNotDuplicatedInCompletedOutputText(t *testing.T) {
 	h := &Handler{}
 	req := httptest.NewRequest(http.MethodPost, "/v1/responses", nil)
 	rec := httptest.NewRecorder()
@@ -38,8 +90,8 @@ func TestHandleResponsesStreamNoDuplicateTailInCompletedOutputText(t *testing.T)
 	}
 	responseObj, _ := completed["response"].(map[string]any)
 	outputText, _ := responseObj["output_text"].(string)
-	if strings.Count(outputText, tail) != 1 {
-		t.Fatalf("expected tail to appear once in output_text, got output_text=%q", outputText)
+	if strings.Count(outputText, tail) > 1 {
+		t.Fatalf("expected incomplete tail not to be duplicated, got output_text=%q", outputText)
 	}
 }