diff --git a/internal/multiagent/eino_orchestration.go b/internal/multiagent/eino_orchestration.go
index 8461225f..fa387137 100644
--- a/internal/multiagent/eino_orchestration.go
+++ b/internal/multiagent/eino_orchestration.go
@@ -7,6 +7,7 @@ import (
 
 	"cyberstrike-ai/internal/agent"
 	"cyberstrike-ai/internal/config"
+	"cyberstrike-ai/internal/database"
 
 	"github.com/cloudwego/eino-ext/components/model/openai"
 	"github.com/cloudwego/eino/adk"
@@ -29,7 +30,9 @@ type PlanExecuteRootArgs struct {
 	MwCfg  *config.MultiAgentEinoMiddlewareConfig
 	// ConversationID is used for transcript/isolation paths in middleware.
 	ConversationID string
-	Logger *zap.Logger
+	DB             *database.DB
+	ProjectID      string
+	Logger         *zap.Logger
 	// ModelName is used for model input token estimation logs.
 	ModelName string
 	// ExecPreMiddlewares 是由 prependEinoMiddlewares 构建的前置中间件（patchtoolcalls, reduction, toolsearch, plantask），
@@ -93,7 +96,7 @@ func NewPlanExecuteRoot(ctx context.Context, a *PlanExecuteRootArgs) (adk.Resuma
 	}
 	// 4. summarization（最后，与 Deep/Supervisor 一致）
 	if a.AppCfg != nil {
-		sumMw, sumErr := newEinoSummarizationMiddleware(ctx, a.ExecModel, a.AppCfg, a.MwCfg, a.ConversationID, a.Logger)
+		sumMw, sumErr := newEinoSummarizationMiddleware(ctx, a.ExecModel, a.AppCfg, a.MwCfg, a.ConversationID, a.DB, a.ProjectID, a.Logger)
 		if sumErr != nil {
 			return nil, fmt.Errorf("plan_execute executor summarization: %w", sumErr)
 		}
diff --git a/internal/multiagent/eino_single_runner.go b/internal/multiagent/eino_single_runner.go
index 96b9df91..c38e508a 100644
--- a/internal/multiagent/eino_single_runner.go
+++ b/internal/multiagent/eino_single_runner.go
@@ -11,6 +11,7 @@ import (
 
 	"cyberstrike-ai/internal/agent"
 	"cyberstrike-ai/internal/config"
+	"cyberstrike-ai/internal/database"
 	"cyberstrike-ai/internal/einomcp"
 	"cyberstrike-ai/internal/openai"
 	"cyberstrike-ai/internal/project"
@@ -32,6 +33,7 @@ func RunEinoSingleChatModelAgent(
 	appCfg *config.Config,
 	ma *config.MultiAgentConfig,
 	ag *agent.Agent,
+	db *database.DB,
 	logger *zap.Logger,
 	conversationID string,
 	projectID string,
@@ -121,7 +123,7 @@ func RunEinoSingleChatModelAgent(
 		return nil, fmt.Errorf("eino single 模型: %w", err)
 	}
 
-	mainSumMw, err := newEinoSummarizationMiddleware(ctx, mainModel, appCfg, &ma.EinoMiddleware, conversationID, logger)
+	mainSumMw, err := newEinoSummarizationMiddleware(ctx, mainModel, appCfg, &ma.EinoMiddleware, conversationID, db, projectID, logger)
 	if err != nil {
 		return nil, fmt.Errorf("eino single summarization: %w", err)
 	}
diff --git a/internal/multiagent/eino_summarize.go b/internal/multiagent/eino_summarize.go
index 5dc358b8..702eb6e1 100644
--- a/internal/multiagent/eino_summarize.go
+++ b/internal/multiagent/eino_summarize.go
@@ -9,7 +9,9 @@ import (
 
 	"cyberstrike-ai/internal/agent"
 	"cyberstrike-ai/internal/config"
+	"cyberstrike-ai/internal/database"
 	copenai "cyberstrike-ai/internal/openai"
+	"cyberstrike-ai/internal/project"
 
 	"github.com/bytedance/sonic"
 	"github.com/cloudwego/eino/adk"
@@ -40,6 +42,8 @@ func newEinoSummarizationMiddleware(
 	appCfg *config.Config,
 	mwCfg *config.MultiAgentEinoMiddlewareConfig,
 	conversationID string,
+	db *database.DB,
+	projectID string,
 	logger *zap.Logger,
 ) (adk.ChatModelAgentMiddleware, error) {
 	if summaryModel == nil || appCfg == nil {
@@ -143,7 +147,14 @@ func newEinoSummarizationMiddleware(
 			},
 		},
 		Finalize: func(ctx context.Context, originalMessages []adk.Message, summary adk.Message) ([]adk.Message, error) {
-			return summarizeFinalizeWithRecentAssistantToolTrail(ctx, originalMessages, summary, tokenCounter, recentTrailMax)
+			out, ferr := summarizeFinalizeWithRecentAssistantToolTrail(ctx, originalMessages, summary, tokenCounter, recentTrailMax)
+			if ferr != nil {
+				return nil, ferr
+			}
+			if appCfg != nil {
+				out = refreshFactIndexInMessages(out, db, projectID, appCfg.Project, logger)
+			}
+			return out, nil
 		},
 		Callback: func(ctx context.Context, before, after adk.ChatModelAgentState) error {
 			if transcriptPath != "" && len(before.Messages) > 0 {
@@ -176,6 +187,50 @@ func newEinoSummarizationMiddleware(
 	return mw, nil
 }
 
+// refreshFactIndexInMessages 在 summarization 压缩后，用 DB 最新索引替换 system 中已有的项目黑板索引段。
+func refreshFactIndexInMessages(msgs []adk.Message, db *database.DB, projectID string, cfg config.ProjectConfig, logger *zap.Logger) []adk.Message {
+	if db == nil || !cfg.Enabled {
+		return msgs
+	}
+	projectID = strings.TrimSpace(projectID)
+	if projectID == "" {
+		return msgs
+	}
+	freshIndex, err := project.BuildFactIndexBlock(db, projectID, cfg)
+	if err != nil {
+		if logger != nil {
+			logger.Warn("summarization: 刷新项目黑板索引失败", zap.String("projectId", projectID), zap.Error(err))
+		}
+		return msgs
+	}
+	freshIndex = strings.TrimSpace(freshIndex)
+	if freshIndex == "" {
+		return msgs
+	}
+
+	changed := false
+	out := make([]adk.Message, len(msgs))
+	for i, msg := range msgs {
+		if msg == nil || msg.Role != schema.System {
+			out[i] = msg
+			continue
+		}
+		newContent, ok := project.ReplaceFactIndexSection(msg.Content, freshIndex)
+		if !ok {
+			out[i] = msg
+			continue
+		}
+		cloned := *msg
+		cloned.Content = newContent
+		out[i] = &cloned
+		changed = true
+	}
+	if changed && logger != nil {
+		logger.Info("summarization: 已刷新项目黑板索引", zap.String("projectId", projectID))
+	}
+	return out
+}
+
 // summarizeFinalizeWithRecentAssistantToolTrail 在摘要消息后保留最近 assistant/tool 轨迹，避免压缩后执行链断裂。
 //
 // 关键不变量：tool_call ↔ tool_result 的 pair 必须整体保留或整体丢弃。
diff --git a/internal/multiagent/eino_summarize_test.go b/internal/multiagent/eino_summarize_test.go
index 7197f672..94fdefda 100644
--- a/internal/multiagent/eino_summarize_test.go
+++ b/internal/multiagent/eino_summarize_test.go
@@ -7,9 +7,14 @@ import (
 	"strings"
 	"testing"
 
+	"cyberstrike-ai/internal/config"
+	"cyberstrike-ai/internal/database"
+	"cyberstrike-ai/internal/project"
+
 	"github.com/cloudwego/eino/adk"
 	"github.com/cloudwego/eino/adk/middlewares/summarization"
 	"github.com/cloudwego/eino/schema"
+	"go.uber.org/zap"
 )
 
 // fixedTokenCounter 让 tool 消息按 tokensPerToolMessage 计，其它消息按 1 计。
@@ -389,9 +394,11 @@ func TestSanitizeSystemContentForTranscript_BestPractice(t *testing.T) {
 		"你是CyberStrikeAI，是一个专业的网络安全渗透测试专家。",
 		"高强度扫描要求：全力出击",
 		"",
+		project.FactIndexSectionStartMarker,
 		"## 项目黑板索引（project: 123, id: abc）",
 		"（暂无事实）",
 		"需要写入请使用 upsert_project_fact。",
+		project.FactIndexSectionEndMarker,
 		"",
 		"# Skills System",
 		"**How to Use Skills**",
@@ -419,7 +426,7 @@ func TestSanitizeSystemContentForTranscript_BestPractice(t *testing.T) {
 func TestFormatSummarizationTranscript_OmitsBloatedSystem(t *testing.T) {
 	t.Parallel()
 	msgs := []adk.Message{
-		schema.SystemMessage("以下是当前会话绑定的工具名称索引\n- nmap\n\n你是CyberStrikeAI\n## 项目黑板索引（project: p1, id: x）\n（暂无事实）\n# Skills System\nboiler"),
+		schema.SystemMessage("以下是当前会话绑定的工具名称索引\n- nmap\n\n你是CyberStrikeAI\n" + project.FactIndexSectionStartMarker + "\n## 项目黑板索引（project: p1, id: x）\n（暂无事实）\n" + project.FactIndexSectionEndMarker + "\n# Skills System\nboiler"),
 		schema.UserMessage("hello"),
 		schema.AssistantMessage("reply", nil),
 	}
@@ -434,3 +441,51 @@ func TestFormatSummarizationTranscript_OmitsBloatedSystem(t *testing.T) {
 		t.Fatalf("dynamic blackboard missing: %q", out)
 	}
 }
+
+func TestRefreshFactIndexInMessages(t *testing.T) {
+	t.Parallel()
+	dbPath := filepath.Join(t.TempDir(), "summarize-facts.db")
+	db, err := database.NewDB(dbPath, zap.NewNop())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	proj, err := db.CreateProject(&database.Project{Name: "summarize-proj"})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cfg := config.ProjectConfig{Enabled: true}
+	oldIndex, err := project.BuildFactIndexBlock(db, proj.ID, cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = db.UpsertProjectFact(&database.ProjectFact{
+		ProjectID: proj.ID,
+		FactKey:   "target/host",
+		Category:  "target",
+		Summary:   "fresh host fact",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	msgs := []adk.Message{
+		schema.SystemMessage("instruction\n\n" + oldIndex),
+		schema.UserMessage("hi"),
+	}
+
+	out := refreshFactIndexInMessages(msgs, db, proj.ID, cfg, nil)
+	sys := out[0].Content
+	if strings.Contains(sys, "（暂无事实）") {
+		t.Fatalf("expected refreshed index, got: %q", sys)
+	}
+	if !strings.Contains(sys, "fresh host fact") {
+		t.Fatalf("expected new fact in index: %q", sys)
+	}
+	if !strings.Contains(sys, "instruction") {
+		t.Fatalf("non-index system content should be preserved: %q", sys)
+	}
+}
diff --git a/internal/multiagent/eino_summarize_transcript.go b/internal/multiagent/eino_summarize_transcript.go
index 7c31f040..fcb7e2c3 100644
--- a/internal/multiagent/eino_summarize_transcript.go
+++ b/internal/multiagent/eino_summarize_transcript.go
@@ -6,6 +6,8 @@ import (
 	"github.com/cloudwego/eino/adk"
 	"github.com/cloudwego/eino/schema"
 
+	"cyberstrike-ai/internal/project"
+
 	"github.com/bytedance/sonic"
 )
 
@@ -19,7 +21,6 @@ const (
 	transcriptToolIndexStartMarker   = "以下是当前会话绑定的工具名称索引"
 	transcriptPersonaStartMarker     = "你是CyberStrikeAI"
 	transcriptSkillsSystemMarker     = "# Skills System"
-	transcriptProjectBlackboardMarker  = "## 项目黑板索引"
 )
 
 // formatSummarizationTranscript renders pre-compaction messages for transcript.txt.
@@ -88,11 +89,17 @@ func stripSkillsSystemBoilerplate(s string) string {
 }
 
 func extractProjectBlackboardSection(s string) string {
-	idx := strings.Index(s, transcriptProjectBlackboardMarker)
-	if idx < 0 {
+	start := strings.Index(s, project.FactIndexSectionStartMarker)
+	if start < 0 {
 		return ""
 	}
-	return strings.TrimSpace(s[idx:])
+	section := s[start:]
+	end := strings.Index(section, project.FactIndexSectionEndMarker)
+	if end < 0 {
+		return ""
+	}
+	section = section[:end+len(project.FactIndexSectionEndMarker)]
+	return strings.TrimSpace(section)
 }
 
 func appendTranscriptSection(sb *strings.Builder, role schema.RoleType, body string) {
diff --git a/internal/multiagent/runner.go b/internal/multiagent/runner.go
index 70279edc..2cc2c32d 100644
--- a/internal/multiagent/runner.go
+++ b/internal/multiagent/runner.go
@@ -15,6 +15,7 @@ import (
 	"cyberstrike-ai/internal/agent"
 	"cyberstrike-ai/internal/agents"
 	"cyberstrike-ai/internal/config"
+	"cyberstrike-ai/internal/database"
 	"cyberstrike-ai/internal/einomcp"
 	"cyberstrike-ai/internal/openai"
 	"cyberstrike-ai/internal/project"
@@ -56,6 +57,7 @@ func RunDeepAgent(
 	appCfg *config.Config,
 	ma *config.MultiAgentConfig,
 	ag *agent.Agent,
+	db *database.DB,
 	logger *zap.Logger,
 	conversationID string,
 	projectID string,
@@ -210,7 +212,7 @@ func RunDeepAgent(
 
 			subMax := resolveMaxIterations(appCfg, sub.MaxIterations)
 
-			subSumMw, err := newEinoSummarizationMiddleware(ctx, subModel, appCfg, &ma.EinoMiddleware, conversationID, logger)
+			subSumMw, err := newEinoSummarizationMiddleware(ctx, subModel, appCfg, &ma.EinoMiddleware, conversationID, db, projectID, logger)
 			if err != nil {
 				return nil, fmt.Errorf("子代理 %q summarization 中间件: %w", id, err)
 			}
@@ -281,7 +283,7 @@ func RunDeepAgent(
 		return nil, fmt.Errorf("多代理主模型: %w", err)
 	}
 
-	mainSumMw, err := newEinoSummarizationMiddleware(ctx, mainModel, appCfg, &ma.EinoMiddleware, conversationID, logger)
+	mainSumMw, err := newEinoSummarizationMiddleware(ctx, mainModel, appCfg, &ma.EinoMiddleware, conversationID, db, projectID, logger)
 	if err != nil {
 		return nil, fmt.Errorf("多代理主 summarization 中间件: %w", err)
 	}
@@ -441,6 +443,8 @@ func RunDeepAgent(
 			AppCfg:               appCfg,
 			MwCfg:                &ma.EinoMiddleware,
 			ConversationID:       conversationID,
+			DB:                   db,
+			ProjectID:            projectID,
 			Logger:               logger,
 			ModelName:            appCfg.OpenAI.Model,
 			ExecPreMiddlewares:   mainOrchestratorPre,