diff --git a/internal/multiagent/eino_single_runner.go b/internal/multiagent/eino_single_runner.go
index 2bade093..ab0696e6 100644
--- a/internal/multiagent/eino_single_runner.go
+++ b/internal/multiagent/eino_single_runner.go
@@ -117,6 +117,7 @@ func RunEinoSingleChatModelAgent(
 		},
 	}
 	httpClient = openai.NewEinoHTTPClient(&appCfg.OpenAI, httpClient)
+	openai.AttachSummarizationDiagTransport(httpClient, logger)
 
 	baseModelCfg := &einoopenai.ChatModelConfig{
 		APIKey:     appCfg.OpenAI.APIKey,
diff --git a/internal/multiagent/eino_summarize.go b/internal/multiagent/eino_summarize.go
index d1ab90b2..762ffd34 100644
--- a/internal/multiagent/eino_summarize.go
+++ b/internal/multiagent/eino_summarize.go
@@ -9,15 +9,19 @@ import (
 
 	"cyberstrike-ai/internal/agent"
 	"cyberstrike-ai/internal/config"
+	copenai "cyberstrike-ai/internal/openai"
 
 	"github.com/bytedance/sonic"
 	"github.com/cloudwego/eino/adk"
 	"github.com/cloudwego/eino/adk/middlewares/summarization"
 	"github.com/cloudwego/eino/components/model"
 	"github.com/cloudwego/eino/schema"
+	einoopenai "github.com/cloudwego/eino-ext/components/model/openai"
 	"go.uber.org/zap"
 )
 
+const defaultSummarizationRetryMax = 3
+
 // einoSummarizeUserInstruction：压缩历史时保留渗透测试关键信息。
 const einoSummarizeUserInstruction = `在保持所有关键安全测试信息完整的前提下压缩对话历史。
 
@@ -89,8 +93,32 @@ func newEinoSummarizationMiddleware(
 		}
 	}
 
+	retryMax := defaultSummarizationRetryMax
+	if mwCfg != nil && mwCfg.SummarizationRetryMaxAttempts > 0 {
+		retryMax = mwCfg.SummarizationRetryMaxAttempts
+	}
+
+	// ModelOptions apply only to summarization Generate (same ChatModel instance as the agent).
+	// Strip thinking/reasoning on this call path; mark requests for empty-choices diagnostics.
+	summaryModelOpts := []model.Option{
+		einoopenai.WithExtraHeader(map[string]string{
+			copenai.SummarizationRequestHeader: "1",
+		}),
+		einoopenai.WithRequestPayloadModifier(func(_ context.Context, in []*schema.Message, rawBody []byte) ([]byte, error) {
+			if logger != nil {
+				logger.Info("eino summarization generate request",
+					zap.Int("input_messages", len(in)),
+					zap.Int("payload_bytes", len(rawBody)),
+					zap.String("model", modelName),
+				)
+			}
+			return stripReasoningFromSummarizationPayload(rawBody)
+		}),
+	}
+
 	mw, err := summarization.New(ctx, &summarization.Config{
-		Model: summaryModel,
+		Model:        summaryModel,
+		ModelOptions: summaryModelOpts,
 		Trigger: &summarization.TriggerCondition{
 			ContextTokens: trigger,
 		},
@@ -102,6 +130,18 @@ func newEinoSummarizationMiddleware(
 			Enabled:   true,
 			MaxTokens: preserveMax,
 		},
+		Retry: &summarization.RetryConfig{
+			MaxRetries: &retryMax,
+			ShouldRetry: func(_ context.Context, _ adk.Message, err error) bool {
+				if err != nil && logger != nil {
+					logger.Warn("eino summarization generate attempt failed, will retry if attempts remain",
+						zap.Error(err),
+						zap.Int("max_retries", retryMax),
+					)
+				}
+				return err != nil
+			},
+		},
 		Finalize: func(ctx context.Context, originalMessages []adk.Message, summary adk.Message) ([]adk.Message, error) {
 			return summarizeFinalizeWithRecentAssistantToolTrail(ctx, originalMessages, summary, tokenCounter, recentTrailMax)
 		},
diff --git a/internal/multiagent/eino_summarize_payload.go b/internal/multiagent/eino_summarize_payload.go
new file mode 100644
index 00000000..03372dac
--- /dev/null
+++ b/internal/multiagent/eino_summarize_payload.go
@@ -0,0 +1,35 @@
+package multiagent
+
+import (
+	"github.com/bytedance/sonic"
+)
+
+// stripReasoningFromSummarizationPayload removes thinking / reasoning fields from a
+// chat-completions JSON body. Applied only to summarization Generate calls via
+// model.ModelOptions on the shared ChatModel — main-agent requests are unchanged.
+func stripReasoningFromSummarizationPayload(rawBody []byte) ([]byte, error) {
+	var payload map[string]any
+	if err := sonic.Unmarshal(rawBody, &payload); err != nil {
+		return rawBody, nil
+	}
+	changed := false
+	for _, key := range []string{
+		"thinking",
+		"reasoning_effort",
+		"output_config",
+		"reasoning",
+	} {
+		if _, ok := payload[key]; ok {
+			delete(payload, key)
+			changed = true
+		}
+	}
+	if !changed {
+		return rawBody, nil
+	}
+	out, err := sonic.Marshal(payload)
+	if err != nil {
+		return rawBody, err
+	}
+	return out, nil
+}
diff --git a/internal/multiagent/eino_summarize_payload_test.go b/internal/multiagent/eino_summarize_payload_test.go
new file mode 100644
index 00000000..a84ce33f
--- /dev/null
+++ b/internal/multiagent/eino_summarize_payload_test.go
@@ -0,0 +1,30 @@
+package multiagent
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestStripReasoningFromSummarizationPayload(t *testing.T) {
+	in := []byte(`{"model":"deepseek-chat","messages":[],"thinking":{"type":"enabled"},"reasoning_effort":"high"}`)
+	out, err := stripReasoningFromSummarizationPayload(in)
+	if err != nil {
+		t.Fatal(err)
+	}
+	s := string(out)
+	if strings.Contains(s, "thinking") || strings.Contains(s, "reasoning_effort") {
+		t.Fatalf("expected reasoning fields stripped, got %s", s)
+	}
+	if !strings.Contains(s, `"model":"deepseek-chat"`) {
+		t.Fatalf("expected model preserved, got %s", s)
+	}
+
+	plain := []byte(`{"model":"gpt-4o","messages":[]}`)
+	out2, err := stripReasoningFromSummarizationPayload(plain)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if string(out2) != string(plain) {
+		t.Fatalf("expected unchanged payload, got %s", out2)
+	}
+}
diff --git a/internal/multiagent/runner.go b/internal/multiagent/runner.go
index d2f12db6..6d5c2237 100644
--- a/internal/multiagent/runner.go
+++ b/internal/multiagent/runner.go
@@ -161,6 +161,7 @@ func RunDeepAgent(
 
 	// 若配置为 Claude provider，注入自动桥接 transport，对 Eino 透明走 Anthropic Messages API
 	httpClient = openai.NewEinoHTTPClient(&appCfg.OpenAI, httpClient)
+	openai.AttachSummarizationDiagTransport(httpClient, logger)
 
 	baseModelCfg := &einoopenai.ChatModelConfig{
 		APIKey:     appCfg.OpenAI.APIKey,
diff --git a/internal/openai/summarization_diag.go b/internal/openai/summarization_diag.go
new file mode 100644
index 00000000..c3be41e5
--- /dev/null
+++ b/internal/openai/summarization_diag.go
@@ -0,0 +1,88 @@
+package openai
+
+import (
+	"bytes"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/bytedance/sonic"
+	"go.uber.org/zap"
+)
+
+// SummarizationRequestHeader marks chat/completion requests issued by Eino summarization
+// middleware (via model.WithExtraHeader). The diagnostic transport logs empty-choices bodies
+// only for these requests so main-agent traffic stays quiet.
+const SummarizationRequestHeader = "X-CyberStrike-Summarization"
+
+const summarizationDiagBodyMaxBytes = 8192
+
+// AttachSummarizationDiagTransport wraps client.Transport to log raw API bodies when
+// summarization receives HTTP 200 with an empty choices array.
+func AttachSummarizationDiagTransport(client *http.Client, logger *zap.Logger) {
+	if client == nil || logger == nil {
+		return
+	}
+	base := client.Transport
+	if base == nil {
+		base = http.DefaultTransport
+	}
+	client.Transport = &summarizationDiagRoundTripper{base: base, logger: logger}
+}
+
+type summarizationDiagRoundTripper struct {
+	base   http.RoundTripper
+	logger *zap.Logger
+}
+
+func (rt *summarizationDiagRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	resp, err := rt.base.RoundTrip(req)
+	if err != nil || resp == nil || resp.Body == nil {
+		return resp, err
+	}
+	if !isSummarizationRequest(req) || !strings.Contains(strings.ToLower(resp.Header.Get("Content-Type")), "json") {
+		return resp, err
+	}
+
+	body, readErr := io.ReadAll(resp.Body)
+	_ = resp.Body.Close()
+	if readErr != nil {
+		resp.Body = io.NopCloser(bytes.NewReader(nil))
+		return resp, err
+	}
+	resp.Body = io.NopCloser(bytes.NewReader(body))
+	resp.ContentLength = int64(len(body))
+
+	if rt.logger != nil && summarizationResponseEmptyChoices(body) {
+		rt.logger.Warn("eino summarization: API returned empty choices",
+			zap.Int("status", resp.StatusCode),
+			zap.Int("response_bytes", len(body)),
+			zap.String("raw_body", truncateForLog(string(body), summarizationDiagBodyMaxBytes)),
+		)
+	}
+	return resp, err
+}
+
+func isSummarizationRequest(req *http.Request) bool {
+	if req == nil {
+		return false
+	}
+	return strings.TrimSpace(req.Header.Get(SummarizationRequestHeader)) == "1"
+}
+
+func summarizationResponseEmptyChoices(body []byte) bool {
+	var parsed struct {
+		Choices []any `json:"choices"`
+	}
+	if err := sonic.Unmarshal(body, &parsed); err != nil {
+		return false
+	}
+	return len(parsed.Choices) == 0
+}
+
+func truncateForLog(s string, maxBytes int) string {
+	if maxBytes <= 0 || len(s) <= maxBytes {
+		return s
+	}
+	return s[:maxBytes] + "…(truncated)"
+}
diff --git a/internal/openai/summarization_diag_test.go b/internal/openai/summarization_diag_test.go
new file mode 100644
index 00000000..753a61ae
--- /dev/null
+++ b/internal/openai/summarization_diag_test.go
@@ -0,0 +1,47 @@
+package openai
+
+import (
+	"io"
+	"net/http"
+	"strings"
+	"testing"
+
+	"go.uber.org/zap"
+)
+
+type staticRoundTripper struct {
+	status int
+	body   string
+}
+
+func (s *staticRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	return &http.Response{
+		StatusCode: s.status,
+		Header:     http.Header{"Content-Type": []string{"application/json"}},
+		Body:       io.NopCloser(strings.NewReader(s.body)),
+	}, nil
+}
+
+func TestSummarizationResponseEmptyChoices(t *testing.T) {
+	if !summarizationResponseEmptyChoices([]byte(`{"choices":[]}`)) {
+		t.Fatal("expected empty choices")
+	}
+	if summarizationResponseEmptyChoices([]byte(`{"choices":[{"index":0}]}`)) {
+		t.Fatal("expected non-empty choices")
+	}
+}
+
+func TestSummarizationDiagRoundTripper_SkipsWithoutHeader(t *testing.T) {
+	client := &http.Client{
+		Transport: &summarizationDiagRoundTripper{
+			base:   &staticRoundTripper{status: 200, body: `{"choices":[]}`},
+			logger: zap.NewNop(),
+		},
+	}
+	req, _ := http.NewRequest(http.MethodPost, "https://example.com/v1/chat/completions", nil)
+	resp, err := client.Do(req)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_ = resp.Body.Close()
+}