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internal/agent/agent.go

@@ -91,15 +91,15 @@ func NewAgent(cfg *config.OpenAIConfig, agentCfg *config.AgentConfig, mcpServer
 	llmClient := openai.NewClient(cfg, httpClient, logger)
 
 	return &Agent{
-		openAIClient:         llmClient,
-		config:               cfg,
-		agentConfig:          agentCfg,
-		mcpServer:            mcpServer,
-		externalMCPMgr:       externalMCPMgr,
-		logger:               logger,
-		maxIterations:        maxIterations,
-		toolNameMapping:      make(map[string]string), // 初始化工具名称映射
-		toolDescriptionMode:  "short",
+		openAIClient:        llmClient,
+		config:              cfg,
+		agentConfig:         agentCfg,
+		mcpServer:           mcpServer,
+		externalMCPMgr:      externalMCPMgr,
+		logger:              logger,
+		maxIterations:       maxIterations,
+		toolNameMapping:     make(map[string]string), // 初始化工具名称映射
+		toolDescriptionMode: "short",
 	}
 }
 
@@ -120,6 +120,9 @@ type ChatMessage struct {
 	ToolName string `json:"tool_name,omitempty"`
 	// ReasoningContent 对应 OpenAI/DeepSeek 的 reasoning_content；思考模式 + 工具调用后续跑须回传（见 DeepSeek 文档）。
 	ReasoningContent string `json:"reasoning_content,omitempty"`
+	// ModelFacingTrace is runtime-only metadata: true means Content was already the exact
+	// payload seen at the model boundary and must be restored byte-for-byte.
+	ModelFacingTrace bool `json:"-"`
 }
 
 // MarshalJSON 自定义JSON序列化，将tool_calls中的arguments转换为JSON字符串

internal/agent/agent_trace.go

@@ -5,6 +5,31 @@ import (
 	"strings"
 )
 
+const ModelFacingTraceVersionKey = "cyberstrike_model_facing_trace_version"
+
+// IsModelFacingTraceJSON reports whether a persisted trace was produced from the final
+// model-boundary state. Legacy traces have no version marker and require one-time migration.
+func IsModelFacingTraceJSON(traceInputJSON string) bool {
+	var raw []map[string]interface{}
+	if err := json.Unmarshal([]byte(strings.TrimSpace(traceInputJSON)), &raw); err != nil {
+		return false
+	}
+	for _, msg := range raw {
+		extra, _ := msg["extra"].(map[string]interface{})
+		v, ok := extra[ModelFacingTraceVersionKey]
+		if !ok {
+			continue
+		}
+		switch n := v.(type) {
+		case float64:
+			return n >= 1
+		case int:
+			return n >= 1
+		}
+	}
+	return false
+}
+
 // ParseTraceMessages 解析落库的 last_react_input（OpenAI 风格 messages JSON 数组）。
 func ParseTraceMessages(traceInputJSON string) ([]ChatMessage, error) {
 	traceInputJSON = strings.TrimSpace(traceInputJSON)
@@ -15,6 +40,7 @@ func ParseTraceMessages(traceInputJSON string) ([]ChatMessage, error) {
 	if err := json.Unmarshal([]byte(traceInputJSON), &raw); err != nil {
 		return nil, err
 	}
+	modelFacing := IsModelFacingTraceJSON(traceInputJSON)
 	out := make([]ChatMessage, 0, len(raw))
 	for _, msgMap := range raw {
 		msg := ChatMessage{}
@@ -23,6 +49,7 @@ func ParseTraceMessages(traceInputJSON string) ([]ChatMessage, error) {
 			continue
 		}
 		msg.Role = role
+		msg.ModelFacingTrace = modelFacing
 		if content, ok := msgMap["content"].(string); ok {
 			msg.Content = content
 		}

internal/agent/agent_trace_test.go

@@ -55,3 +55,22 @@ func TestMergeAssistantTraceOutput(t *testing.T) {
 		t.Fatalf("expected merged output, got %q", out[len(out)-1].Content)
 	}
 }
+
+func TestParseTraceMessagesMarksVersionedModelFacingTrace(t *testing.T) {
+	raw := `[{"role":"system","content":"s","extra":{"cyberstrike_model_facing_trace_version":1}},{"role":"user","content":"u"},{"role":"tool","content":"exact","tool_call_id":"c1"}]`
+	if !IsModelFacingTraceJSON(raw) {
+		t.Fatal("versioned trace not detected")
+	}
+	msgs, err := ParseTraceMessages(raw)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for i, msg := range msgs {
+		if !msg.ModelFacingTrace {
+			t.Fatalf("message %d missing model-facing marker", i)
+		}
+	}
+	if IsModelFacingTraceJSON(`[{"role":"user","content":"legacy"}]`) {
+		t.Fatal("legacy trace incorrectly marked model-facing")
+	}
+}