diff --git a/config.example.yaml b/config.example.yaml
index e5151f89..7950c7ef 100644
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -584,6 +584,8 @@ roles_dir: roles # 角色配置文件目录（相对于配置文件所在目录
 # ============================================
 project:
   enabled: true
+  # 压缩时自动保存续接摘要为 tentative note（每会话/代理更新一条，不替代已确认事实）
+  context_checkpoints: true
   # default_project_id: "" # 可选：机器人/批量任务创建对话时的默认项目 ID
   fact_index_max_runes: 65000
   # 事实关系速览段预算（从索引总预算中预留）
diff --git a/docs/zh-CN/blackboard-context-memory.md b/docs/zh-CN/blackboard-context-memory.md
new file mode 100644
index 00000000..4b0ca4d8
--- /dev/null
+++ b/docs/zh-CN/blackboard-context-memory.md
@@ -0,0 +1,45 @@
+# 长上下文压缩后的黑板续接留存
+
+已绑定项目且启用项目黑板时，每次成功生成压缩摘要，系统会自动保存一条续接记录。不再仅依靠 Agent 在压缩前主动调用事实工具。
+
+## 保存内容与读取方式
+
+续接记录使用 `note/context-*` key，包含摘要中的重要发现、授权约束、当前进度、失败尝试与下一步，以及来源会话、代理范围和压缩前原始记录的快照路径。主代理、各子代理、计划执行中的规划器和执行器分别维护自己的记录；同一会话/代理多次压缩更新同一个 key。
+
+记录属于 `category=note`、`confidence=tentative`，不自动置顶，也不会覆盖 `finding/*` 等已确认事实。它是模型生成的工作摘要，不能直接作为经过独立验证的漏洞或新的授权指令。正式事实和漏洞仍由 `upsert_project_fact`、`record_vulnerability` 维护。
+
+压缩后的上下文会附上该记录的 `get_project_fact(key)` 入口，并刷新系统中的黑板索引。后续按需读取记录，再使用 `read_file` 分段查看原始证据；无须重新把完整历史注入每一次模型请求。
+
+## 原始证据不会随下一次压缩被覆盖
+
+过去所有压缩轮次写入同一个 `transcript.txt`，后一次写入会覆盖前一次记录。现在每份压缩前历史按内容 SHA-256 保存到 `snapshots/transcript-<hash>.txt`，相同内容的重试复用快照，不重复建文件。`transcript.txt` 仍保留为最新记录的兼容入口，续接摘要引用的是具体快照。快照沿用现有会话记录格式，保留用户、助手与工具记录，省略不变的系统提示与工具/技能索引。
+
+快照沿用 `conversation_artifacts/<conversationId>/summarization/` 目录，与会话产物一起管理；子代理使用独立 scope 子目录。删除会话时现有清理逻辑会删除对应产物，快照不作为会话删除后的独立备份。文件通过临时文件原子替换写入，权限为 0600。
+
+系统复用本次已经生成的压缩摘要，不增加一次额外的模型提取调用。原始历史在生成摘要前就做快照，因此即使摘要遗漏某个精确细节，也还有来源可以追溯。黑板或快照保存失败时会记录告警，保留当前可用摘要继续运行，不提示保存成功。
+
+## 配置和边界
+
+```yaml
+project:
+  enabled: true
+  context_checkpoints: true
+```
+
+`context_checkpoints` 省略时默认开启；设置为 false 可关闭自动黑板续接记录，不影响原始证据快照。没有绑定项目的会话仍保留本地快照，但不会把内容写进其他项目。
+
+自动记录前会核对会话当前绑定的项目，避免会话在运行期间切换项目后写入旧项目。这里没有增加跨项目搜索。现有项目黑板权限与事实工具的当前会话范围继续适用。
+
+自动记录只在压缩触发时落库，不能代替每次新发现后的即时事实登记。摘要仍可能遗漏细节；具体原文以快照为准。快照累计占用本地存储，保留到对应会话产物被清理。
+
+## 索引预算与来源区分
+
+自动注入仍只包含 key、短摘要与关系边，完整 body 留在数据库按需读取。索引查询不再加载最终不会注入的 body。字符预算现在包含标题、起止标记、查询提示、遗漏说明和关系速览；特别小的预算会使用简短查询提示或不注入索引，不截断 HTML 边界。
+
+遗留超长 summary 在展示索引时缩短为单行，库中的完整 summary/body 不改动。关系速览仅使用实际列入索引的事实，避免预算外事实继续通过路径视图占用上下文。置顶与事实类型的原有优先级保持不变。
+
+## 实现依据与验证
+
+Eino 的压缩流程支持在 `Finalize` 中处理摘要并重写上下文，`Callback` 在后处理之后触发；本项目在既有自定义 Finalize 中落库、附上快照引用，然后更新索引。普通消息与原生 AgenticMessage 路径均使用同一留存函数。[Eino Summarization 文档](https://www.cloudwego.io/docs/eino/core_modules/eino_adk/eino_adk_chatmodelagentmiddleware/middleware_summarization/)
+
+回归覆盖多次压缩保留早期证据、重复快照幂等、原子文件权限、主/子代理记录隔离、已确认事实保持不变、配置关闭、项目不匹配、保存失败不宣称成功、多段文本摘要、普通与原生中间件自动落库/刷新，以及索引硬预算和正文不注入。
diff --git a/docs/zh-CN/configuration.md b/docs/zh-CN/configuration.md
index 8b9aed3c..edca05d7 100644
--- a/docs/zh-CN/configuration.md
+++ b/docs/zh-CN/configuration.md
@@ -256,12 +256,14 @@ c2:
   enabled: true
 project:
   enabled: true
+  context_checkpoints: true
   fact_index_max_runes: 65000
 ```
 
 - `c2.enabled`：关闭后不启动 C2 监听器，也不注册 C2 MCP 工具。
 - WebShell 连接配置存 SQLite，没有单独的主配置开关。
 - `project` 控制跨对话事实黑板注入预算。
+- `project.context_checkpoints` 默认开启：已绑定项目的会话成功压缩时，将续接摘要自动保存为 `note/context-*`（tentative），按会话及主/子代理分别更新，不覆盖已确认事实。完整原始记录保存为不可变快照，后续可通过 `get_project_fact` 与 `read_file` 找回。关闭此项仅停止自动黑板记录，仍保留原始上下文快照。详见 [长上下文续接留存](blackboard-context-memory.md)。
 
 ## 机器人
 
diff --git a/internal/config/config.go b/internal/config/config.go
index dc5c9165..2249919b 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -78,6 +78,7 @@ const (
 
 // ProjectConfig 项目黑板（跨对话共享事实）配置。
 type ProjectConfig struct {
+	ContextCheckpoints      *bool  `yaml:"context_checkpoints,omitempty" json:"context_checkpoints,omitempty"`
 	Enabled                 bool   `yaml:"enabled" json:"enabled"`
 	DefaultProjectID        string `yaml:"default_project_id,omitempty" json:"default_project_id,omitempty"` // 机器人/批量等无显式项目时绑定的默认项目
 	FactIndexMaxRunes       int    `yaml:"fact_index_max_runes,omitempty" json:"fact_index_max_runes,omitempty"`
@@ -86,6 +87,11 @@ type ProjectConfig struct {
 	DefaultInjectDeprecated bool   `yaml:"default_inject_deprecated,omitempty" json:"default_inject_deprecated,omitempty"`
 }
 
+// ContextCheckpointsEnabled persists generated continuation notes on compaction.
+func (c ProjectConfig) ContextCheckpointsEnabled() bool {
+	return c.ContextCheckpoints == nil || *c.ContextCheckpoints
+}
+
 // FactIndexMaxRunesEffective 自动注入黑板索引的最大 rune 数。
 func (c ProjectConfig) FactIndexMaxRunesEffective() int {
 	if c.FactIndexMaxRunes <= 0 {
diff --git a/internal/database/project.go b/internal/database/project.go
index c2201267..68620931 100644
--- a/internal/database/project.go
+++ b/internal/database/project.go
@@ -337,7 +337,7 @@ func (db *DB) SetConversationProjectID(conversationID, projectID string) error {
 
 // ListProjectFactsForIndex 列出用于黑板索引注入的事实（不含 deprecated，除非 includeDeprecated）。
 func (db *DB) ListProjectFactsForIndex(projectID string, includeDeprecated bool) ([]*ProjectFact, error) {
-	query := `SELECT id, project_id, fact_key, category, summary, COALESCE(body,''), confidence,
+	query := `SELECT id, project_id, fact_key, category, summary, '', confidence,
 		COALESCE(source_conversation_id,''), COALESCE(source_message_id,''), pinned,
 		COALESCE(related_vulnerability_id,''), created_at, updated_at
 		FROM project_facts WHERE project_id = ?`
diff --git a/internal/multiagent/eino_agentic_summarize.go b/internal/multiagent/eino_agentic_summarize.go
index a2423370..0526beb1 100644
--- a/internal/multiagent/eino_agentic_summarize.go
+++ b/internal/multiagent/eino_agentic_summarize.go
@@ -28,6 +28,7 @@ func newEinoAgenticSummarizationMiddleware(
 	db *database.DB,
 	projectID string,
 	logger *zap.Logger,
+	memoryScopes ...string,
 ) (adk.TypedChatModelAgentMiddleware[*schema.AgenticMessage], error) {
 	if summaryModel == nil || appCfg == nil {
 		return nil, fmt.Errorf("multiagent: agentic summarization 需要 model 与配置")
@@ -90,12 +91,16 @@ func newEinoAgenticSummarizationMiddleware(
 		summaryInputMax = 4096
 	}
 
+	memoryScope := summarizationMemoryScope(memoryScopes)
 	transcriptPath := ""
 	if conv := strings.TrimSpace(conversationID); conv != "" {
 		baseRoot := filepath.Join(os.TempDir(), "cyberstrike-summarization")
 		if dbPath := strings.TrimSpace(appCfg.Database.Path); dbPath != "" {
 			baseRoot = filepath.Join(filepath.Dir(dbPath), "conversation_artifacts", sanitizeEinoPathSegment(conv), "summarization")
 		}
+		if memoryScope != "main" {
+			baseRoot = filepath.Join(baseRoot, "scopes", summarizationScopeID(memoryScope))
+		}
 		base := baseRoot
 		if abs, err := filepath.Abs(base); err == nil {
 			base = abs
@@ -202,8 +207,7 @@ func newEinoAgenticSummarizationMiddleware(
 			if len(defaultFinalized) == 0 {
 				return nil, fmt.Errorf("agentic summarization default finalize returned no messages")
 			}
-			summaryMsg := appendTranscriptPathToSummarizationMessage(defaultFinalized[len(defaultFinalized)-1], transcriptPath)
-			summaryMsg = stripAnalysisFromSummarizationMessage(summaryMsg)
+			summaryMsg := finalizeSummarizationMemory(defaultFinalized[len(defaultFinalized)-1], classicOriginal, transcriptPath, db, projectID, conversationID, memoryScope, appCfg.Project, logger)
 			userLedger := buildOriginalUserIntentLedgerMessage(classicOriginal, userLedgerMaxRunes, userLedgerEntryMaxRunes)
 			out, ferr := summarizeFinalizeWithRecentAssistantToolTrail(ctx, compactionMessages, summaryMsg, classicTokenCounter, recentTrailMax)
 			if ferr != nil {
diff --git a/internal/multiagent/eino_context_checkpoint.go b/internal/multiagent/eino_context_checkpoint.go
new file mode 100644
index 00000000..d0c85e00
--- /dev/null
+++ b/internal/multiagent/eino_context_checkpoint.go
@@ -0,0 +1,181 @@
+package multiagent
+
+import (
+	"crypto/sha256"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"cyberstrike-ai/internal/config"
+	"cyberstrike-ai/internal/database"
+
+	"github.com/cloudwego/eino/adk"
+	"github.com/cloudwego/eino/schema"
+	"go.uber.org/zap"
+)
+
+// Content-addressed snapshots keep earlier evidence reachable after the mutable
+// transcript.txt alias advances to a later compaction round.
+func writeSummarizationTranscriptSnapshot(path string, msgs []adk.Message) (string, error) {
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return "", nil
+	}
+	body := []byte(formatSummarizationTranscript(msgs))
+	dir := filepath.Join(filepath.Dir(path), "snapshots")
+	if err := os.MkdirAll(dir, 0o700); err != nil {
+		return "", err
+	}
+	digest := sha256.Sum256(body)
+	snapshot := filepath.Join(dir, fmt.Sprintf("transcript-%x.txt", digest))
+	if _, err := os.Stat(snapshot); os.IsNotExist(err) {
+		if err := writeContextArtifactAtomically(snapshot, body); err != nil {
+			return "", err
+		}
+	} else if err != nil {
+		return "", err
+	}
+	if err := writeContextArtifactAtomically(path, body); err != nil {
+		return "", err
+	}
+	return snapshot, nil
+}
+
+func writeContextArtifactAtomically(path string, body []byte) error {
+	file, err := os.CreateTemp(filepath.Dir(path), ".context-*")
+	if err != nil {
+		return err
+	}
+	temp := file.Name()
+	defer os.Remove(temp)
+	if _, err = file.Write(body); err != nil {
+		file.Close()
+		return err
+	}
+	if err = file.Close(); err != nil {
+		return err
+	}
+	return os.Rename(temp, path)
+}
+
+// Persist generated working memory separately from verified project findings.
+// One key per conversation/agent scope is updated; retries do not grow the fact index.
+func persistSummarizationCheckpoint(db *database.DB, projectID, conversationID, memoryScope, summary, snapshot string, cfg config.ProjectConfig) (string, error) {
+	if db == nil || !cfg.Enabled || !cfg.ContextCheckpointsEnabled() || strings.TrimSpace(projectID) == "" || strings.TrimSpace(conversationID) == "" || strings.TrimSpace(summary) == "" {
+		return "", nil
+	}
+	// Bind storage to the current conversation rather than trusting a stale run's project ID.
+	bound, err := db.GetConversationProjectID(conversationID)
+	if err != nil {
+		return "", err
+	}
+	if bound != projectID {
+		return "", fmt.Errorf("checkpoint project does not match conversation")
+	}
+	hash := sha256.Sum256([]byte(conversationID + "\x00" + memoryScope))
+	key := fmt.Sprintf("note/context-%x", hash[:16])
+	body := "## 会话续接记录（自动摘要，尚未经独立验证）\n来源对话: " + conversationID + "\n代理范围: " + memoryScope + "\n\n" + summary
+	if snapshot != "" {
+		body += "\n\n压缩前原始证据快照（按需 read_file）: " + snapshot
+	}
+	_, err = db.UpsertProjectFact(&database.ProjectFact{
+		ProjectID: projectID, FactKey: key, Category: "note", Confidence: "tentative",
+		SourceConversationID: conversationID,
+		Summary:              checkpointSummaryLabel(memoryScope, summary, cfg.FactSummaryMaxRunesEffective()),
+		Body:                 body,
+	})
+	if err != nil {
+		return "", err
+	}
+	return key, nil
+}
+
+func checkpointSummaryLabel(scope, summary string, cap int) string {
+	// A generated note must not turn a permissive fact-summary setting into
+	// automatic reinjection of the entire compaction output.
+	if cap > 200 {
+		cap = 200
+	}
+	var lines []string
+	for _, line := range strings.Split(summary, "\n") {
+		line = strings.TrimSpace(line)
+		if line == "" || strings.HasPrefix(line, "#") || strings.HasPrefix(line, "<") {
+			continue
+		}
+		lines = append(lines, strings.TrimLeft(line, "- *"))
+		if len(lines) == 4 {
+			break
+		}
+	}
+	label := "自动续接（" + strings.Join(strings.Fields(scope), " ") + "）：" + strings.Join(lines, "；")
+	runes := []rune(label)
+	if len(runes) > cap {
+		return string(runes[:cap-1]) + "…"
+	}
+	return label
+}
+
+func finalizeSummarizationMemory(msg adk.Message, originals []adk.Message, transcriptPath string, db *database.DB, projectID, conversationID, memoryScope string, cfg config.ProjectConfig, logger *zap.Logger) adk.Message {
+	msg = stripAnalysisFromSummarizationMessage(msg)
+	snapshot, err := writeSummarizationTranscriptSnapshot(transcriptPath, originals)
+	if err != nil && logger != nil {
+		logger.Warn("保存上下文证据快照失败", zap.Error(err))
+	}
+	// Only advertise an artifact that was successfully written.
+	if err == nil {
+		msg = appendTranscriptPathToSummarizationMessage(msg, snapshot)
+	}
+	text := ""
+	if msg != nil {
+		text = msg.Content
+		if text == "" {
+			for _, part := range msg.UserInputMultiContent {
+				if part.Type == schema.ChatMessagePartTypeText {
+					text = part.Text
+					break
+				}
+			}
+		}
+	}
+	if inner, ok := extractSummarizationSummaryBody(text); ok {
+		text = inner
+	}
+	key, err := persistSummarizationCheckpoint(db, projectID, conversationID, memoryScope, text, snapshot, cfg)
+	if err != nil {
+		if logger != nil {
+			logger.Warn("保存黑板续接记录失败", zap.String("conversationId", conversationID), zap.Error(err))
+		}
+		return msg
+	}
+	if key == "" || msg == nil {
+		return msg
+	}
+	section := "本轮续接摘要已保存到项目黑板 get_project_fact(" + key + ")；这是未独立验证的工作记录，使用前核对证据与当前任务范围。"
+	clone := *msg
+	if clone.Content != "" {
+		clone.Content = appendSummarizationSection(clone.Content, section)
+	}
+	if len(clone.UserInputMultiContent) > 0 {
+		clone.UserInputMultiContent = append([]schema.MessageInputPart(nil), clone.UserInputMultiContent...)
+		for i, part := range clone.UserInputMultiContent {
+			if part.Type == schema.ChatMessagePartTypeText {
+				clone.UserInputMultiContent[i].Text = appendSummarizationSection(part.Text, section)
+				break
+			}
+		}
+	}
+	return &clone
+}
+
+func summarizationMemoryScope(scopes []string) string {
+	if len(scopes) > 0 && strings.TrimSpace(scopes[0]) != "" {
+		return strings.TrimSpace(scopes[0])
+	}
+	return "main"
+}
+
+func summarizationScopeID(scope string) string {
+	hash := sha256.Sum256([]byte(scope))
+	return fmt.Sprintf("%x", hash[:16])
+}
diff --git a/internal/multiagent/eino_context_checkpoint_test.go b/internal/multiagent/eino_context_checkpoint_test.go
new file mode 100644
index 00000000..ebc8711f
--- /dev/null
+++ b/internal/multiagent/eino_context_checkpoint_test.go
@@ -0,0 +1,199 @@
+package multiagent
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"cyberstrike-ai/internal/config"
+	"cyberstrike-ai/internal/database"
+	"cyberstrike-ai/internal/project"
+
+	"github.com/cloudwego/eino/adk"
+	"github.com/cloudwego/eino/schema"
+	"go.uber.org/zap"
+)
+
+func TestTranscriptSnapshotsPreserveEarlierEvidence(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "transcript.txt")
+	first := []adk.Message{schema.UserMessage("first target"), schema.AssistantMessage("first evidence", nil)}
+	before, err := writeSummarizationTranscriptSnapshot(path, first)
+	if err != nil {
+		t.Fatal(err)
+	}
+	again, err := writeSummarizationTranscriptSnapshot(path, first)
+	if err != nil || before != again {
+		t.Fatalf("snapshot is not idempotent: %s %s %v", before, again, err)
+	}
+	after, err := writeSummarizationTranscriptSnapshot(path, []adk.Message{schema.UserMessage("second target")})
+	if err != nil || before == after {
+		t.Fatalf("new history reused old snapshot: %v", err)
+	}
+	raw, err := os.ReadFile(before)
+	if err != nil || !strings.Contains(string(raw), "first evidence") {
+		t.Fatalf("earlier evidence lost: %s %v", raw, err)
+	}
+	alias, _ := os.ReadFile(path)
+	if !strings.Contains(string(alias), "second target") {
+		t.Fatal("latest alias not updated")
+	}
+	stat, _ := os.Stat(before)
+	if stat.Mode().Perm() != 0o600 {
+		t.Fatalf("snapshot permissions: %v", stat.Mode())
+	}
+	files, _ := filepath.Glob(filepath.Join(filepath.Dir(before), "transcript-*.txt"))
+	if len(files) != 2 {
+		t.Fatalf("retries duplicated snapshots: %v", files)
+	}
+}
+
+func checkpointTestProject(t *testing.T) (*database.DB, string, string) {
+	t.Helper()
+	db, err := database.NewDB(filepath.Join(t.TempDir(), "test.db"), zap.NewNop())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { db.Close() })
+	proj, err := db.CreateProject(&database.Project{Name: "memory"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	conv, err := db.CreateConversation("test", database.ConversationCreateMeta{ProjectID: proj.ID})
+	if err != nil {
+		t.Fatal(err)
+	}
+	return db, proj.ID, conv.ID
+}
+
+func TestContextCheckpointsSeparateAgentsAndPreserveConfirmedFacts(t *testing.T) {
+	db, pid, cid := checkpointTestProject(t)
+	cfg := config.ProjectConfig{Enabled: true}
+	db.UpsertProjectFact(&database.ProjectFact{ProjectID: pid, FactKey: "finding/original", Category: "finding", Confidence: "confirmed", Body: "original evidence", Summary: "confirmed result", Pinned: true})
+	main, err := persistSummarizationCheckpoint(db, pid, cid, "main", "first summary", "/old/snapshot", cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	updated, err := persistSummarizationCheckpoint(db, pid, cid, "main", "new summary", "/new/snapshot", cfg)
+	if err != nil || updated != main {
+		t.Fatalf("unstable key: %s %s %v", main, updated, err)
+	}
+	sub, err := persistSummarizationCheckpoint(db, pid, cid, "sub/scanner", "sub findings", "/sub/snapshot", cfg)
+	if err != nil || sub == main {
+		t.Fatalf("subagent overwrites coordinator: %v", err)
+	}
+	fact, _ := db.GetProjectFactByKey(pid, main)
+	if fact.Confidence != "tentative" || fact.Pinned || fact.SourceConversationID != cid || !strings.Contains(fact.Body, "new summary") || !strings.Contains(fact.Body, "/new/snapshot") {
+		t.Fatalf("invalid checkpoint: %#v", fact)
+	}
+	existing, _ := db.GetProjectFactByKey(pid, "finding/original")
+	if existing.Confidence != "confirmed" || existing.Body != "original evidence" || !existing.Pinned {
+		t.Fatalf("confirmed fact altered: %#v", existing)
+	}
+	facts, err := db.ListProjectFacts(pid, database.ProjectFactListFilter{}, 100, 0)
+	if err != nil || len(facts) != 3 {
+		t.Fatalf("checkpoint updates grow fact list: %d %v", len(facts), err)
+	}
+}
+
+func TestContextCheckpointDisabledAndProjectMismatch(t *testing.T) {
+	db, pid, cid := checkpointTestProject(t)
+	off := false
+	for _, cfg := range []config.ProjectConfig{{Enabled: false}, {Enabled: true, ContextCheckpoints: &off}} {
+		key, err := persistSummarizationCheckpoint(db, pid, cid, "main", "summary", "", cfg)
+		if err != nil || key != "" {
+			t.Fatalf("disabled checkpoint wrote data: %s %v", key, err)
+		}
+	}
+	if key, err := persistSummarizationCheckpoint(db, "other-project", cid, "main", "summary", "", config.ProjectConfig{Enabled: true}); err == nil || key != "" {
+		t.Fatalf("wrong-project write: %s %v", key, err)
+	}
+}
+
+func TestFinalizeMemorySupportsMultipartSummaryAndReportsOnlySuccessfulWrites(t *testing.T) {
+	db, pid, cid := checkpointTestProject(t)
+	original := []adk.Message{schema.UserMessage("exact evidence from history")}
+	summary := &schema.Message{Role: schema.User, UserInputMultiContent: []schema.MessageInputPart{{Type: schema.ChatMessagePartTypeText, Text: "<analysis>internal</analysis><summary>keep important finding</summary>"}}}
+	out := finalizeSummarizationMemory(summary, original, filepath.Join(t.TempDir(), "transcript.txt"), db, pid, cid, "main", config.ProjectConfig{Enabled: true}, nil)
+	text := out.UserInputMultiContent[0].Text
+	if strings.Contains(text, "internal") || !strings.Contains(text, "snapshots/transcript-") || !strings.Contains(text, "get_project_fact(note/context-") {
+		t.Fatalf("continuation missing durable references: %s", text)
+	}
+	if !strings.Contains(summary.UserInputMultiContent[0].Text, "internal") {
+		t.Fatal("input summary was mutated")
+	}
+	bad := finalizeSummarizationMemory(schema.UserMessage("still usable summary"), original, "", db, "wrong-project", cid, "main", config.ProjectConfig{Enabled: true}, nil)
+	if strings.Contains(bad.Content, "已保存") || !strings.Contains(bad.Content, "still usable summary") {
+		t.Fatalf("failed write claimed success or lost summary: %s", bad.Content)
+	}
+}
+
+func TestSummarizationMiddlewaresAutomaticallySaveCheckpoint(t *testing.T) {
+	for _, native := range []bool{false, true} {
+		t.Run(fmt.Sprintf("native=%v", native), func(t *testing.T) {
+			db, pid, cid := checkpointTestProject(t)
+			cfg := &config.Config{Project: config.ProjectConfig{Enabled: true}}
+			cfg.Database.Path = filepath.Join(t.TempDir(), "runtime.db")
+			cfg.OpenAI.Model = "gpt-4o"
+			cfg.OpenAI.MaxTotalTokens = 5000
+			emit := false
+			mwCfg := &config.MultiAgentEinoMiddlewareConfig{SummarizationEmitInternalEvents: &emit, SummarizationOutputReserveTokens: 1024}
+			index, err := project.BuildFactIndexBlock(db, pid, cfg.Project)
+			if err != nil {
+				t.Fatal(err)
+			}
+			originals := []adk.Message{
+				schema.SystemMessage("system root\n" + index),
+				schema.UserMessage("precise original evidence\n" + strings.Repeat("old scan output ", 12000)),
+				schema.AssistantMessage("found endpoint", nil),
+				schema.UserMessage("continue from confirmed endpoint"),
+			}
+			const summary = "<analysis>do not persist scratchpad</analysis><summary>Important endpoint /api/check; next validate response</summary>"
+			var after []adk.Message
+			ctx := context.Background()
+			if native {
+				m := &capturingAgenticChatModel{output: agenticAssistantTextMessage(summary)}
+				mw, err := newEinoAgenticSummarizationMiddleware(ctx, m, cfg, mwCfg, cid, db, pid, nil)
+				if err != nil {
+					t.Fatal(err)
+				}
+				_, state, err := mw.BeforeModelRewriteState(ctx, &adk.TypedChatModelAgentState[*schema.AgenticMessage]{Messages: EinoMessagesToAgentic(originals)}, nil)
+				if err != nil {
+					t.Fatal(err)
+				}
+				after = AgenticMessagesToEino(state.Messages)
+			} else {
+				m := &capturingClassicChatModel{output: &schema.Message{Role: schema.Assistant, Content: summary, ResponseMeta: &schema.ResponseMeta{FinishReason: "stop"}}}
+				mw, err := newEinoSummarizationMiddleware(ctx, m, cfg, mwCfg, cid, db, pid, nil)
+				if err != nil {
+					t.Fatal(err)
+				}
+				_, state, err := mw.BeforeModelRewriteState(ctx, &adk.ChatModelAgentState{Messages: originals}, nil)
+				if err != nil {
+					t.Fatal(err)
+				}
+				after = state.Messages
+			}
+			facts, err := db.ListProjectFacts(pid, database.ProjectFactListFilter{}, 100, 0)
+			if err != nil || len(facts) != 1 {
+				t.Fatalf("automatic checkpoint missing: %v %#v", err, facts)
+			}
+			if !strings.Contains(facts[0].Body, "/api/check") || strings.Contains(facts[0].Body, "scratchpad") {
+				t.Fatalf("wrong working memory: %s", facts[0].Body)
+			}
+			joined := joinClassicMessageContent(after)
+			if !strings.Contains(joined, facts[0].FactKey) || strings.Contains(joined, "（暂无事实）") {
+				t.Fatalf("live index did not refresh after save: %s", joined)
+			}
+		})
+	}
+}
+
+func TestCheckpointIndexLabelStaysShortWithLargeSummarySetting(t *testing.T) {
+	label := checkpointSummaryLabel("main", "## findings\n- Important endpoint /api/check\n- "+strings.Repeat("raw output ", 1000), 24000)
+	if len([]rune(label)) > 200 || !strings.Contains(label, "/api/check") {
+		t.Fatalf("checkpoint reinjects long history or loses key hint: %s", label)
+	}
+}
diff --git a/internal/multiagent/eino_orchestration.go b/internal/multiagent/eino_orchestration.go
index 051984e2..26b6f61a 100644
--- a/internal/multiagent/eino_orchestration.go
+++ b/internal/multiagent/eino_orchestration.go
@@ -118,7 +118,7 @@ func buildPlanExecuteAgenticExecutorHandlers(ctx context.Context, a *PlanExecute
 		execHandlers = append(execHandlers, a.AgenticSkillMiddleware)
 	}
 	if a.AppCfg != nil {
-		sumMw, sumErr := newEinoAgenticSummarizationMiddleware(ctx, a.AgenticExecModel, a.AppCfg, a.MwCfg, a.ConversationID, a.DB, a.ProjectID, a.Logger)
+		sumMw, sumErr := newEinoAgenticSummarizationMiddleware(ctx, a.AgenticExecModel, a.AppCfg, a.MwCfg, a.ConversationID, a.DB, a.ProjectID, a.Logger, "plan_execute/executor")
 		if sumErr != nil {
 			return nil, fmt.Errorf("plan_execute agentic executor summarization: %w", sumErr)
 		}
diff --git a/internal/multiagent/eino_summarize.go b/internal/multiagent/eino_summarize.go
index 63eede98..180a2347 100644
--- a/internal/multiagent/eino_summarize.go
+++ b/internal/multiagent/eino_summarize.go
@@ -88,6 +88,7 @@ func newEinoSummarizationMiddleware(
 	db *database.DB,
 	projectID string,
 	logger *zap.Logger,
+	memoryScopes ...string,
 ) (adk.ChatModelAgentMiddleware, error) {
 	if summaryModel == nil || appCfg == nil {
 		return nil, fmt.Errorf("multiagent: summarization 需要 model 与配置")
@@ -144,6 +145,7 @@ func newEinoSummarizationMiddleware(
 	if summaryInputMax < 4096 {
 		summaryInputMax = 4096
 	}
+	memoryScope := summarizationMemoryScope(memoryScopes)
 	transcriptPath := ""
 	if conv := strings.TrimSpace(conversationID); conv != "" {
 		baseRoot := filepath.Join(os.TempDir(), "cyberstrike-summarization")
@@ -151,6 +153,9 @@ func newEinoSummarizationMiddleware(
 			// Persist with the same lifecycle as local conversation storage.
 			baseRoot = filepath.Join(filepath.Dir(dbPath), "conversation_artifacts", sanitizeEinoPathSegment(conv), "summarization")
 		}
+		if memoryScope != "main" {
+			baseRoot = filepath.Join(baseRoot, "scopes", summarizationScopeID(memoryScope))
+		}
 		base := baseRoot
 		if abs, err := filepath.Abs(base); err == nil {
 			base = abs
@@ -247,8 +252,7 @@ func newEinoSummarizationMiddleware(
 			if len(defaultFinalized) == 0 {
 				return nil, fmt.Errorf("summarization default finalize returned no messages")
 			}
-			summary = appendTranscriptPathToSummarizationMessage(defaultFinalized[len(defaultFinalized)-1], transcriptPath)
-			summary = stripAnalysisFromSummarizationMessage(summary)
+			summary = finalizeSummarizationMemory(defaultFinalized[len(defaultFinalized)-1], originalMessages, transcriptPath, db, projectID, conversationID, memoryScope, appCfg.Project, logger)
 			userLedger := buildOriginalUserIntentLedgerMessage(originalMessages, userLedgerMaxRunes, userLedgerEntryMaxRunes)
 			out, ferr := summarizeFinalizeWithRecentAssistantToolTrail(ctx, compactionMessages, summary, tokenCounter, recentTrailMax)
 			if ferr != nil {
@@ -679,14 +683,8 @@ func writeSummarizationTranscript(path string, msgs []adk.Message) error {
 	if path == "" {
 		return nil
 	}
-	body := formatSummarizationTranscript(msgs)
-	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
-		return fmt.Errorf("mkdir transcript dir: %w", err)
-	}
-	if err := os.WriteFile(path, []byte(body), 0o600); err != nil {
-		return fmt.Errorf("write transcript: %w", err)
-	}
-	return nil
+	_, err := writeSummarizationTranscriptSnapshot(path, msgs)
+	return err
 }
 
 func einoSummarizationTokenCounter(openAIModel string) summarization.TokenCounterFunc {
diff --git a/internal/multiagent/runner.go b/internal/multiagent/runner.go
index a4bbb568..c4ed82c2 100644
--- a/internal/multiagent/runner.go
+++ b/internal/multiagent/runner.go
@@ -222,7 +222,7 @@ func RunDeepAgent(
 
 			subMax := resolveMaxIterations(appCfg, sub.MaxIterations)
 
-			subSumMw, err := newEinoAgenticSummarizationMiddleware(ctx, subModel, appCfg, &ma.EinoMiddleware, conversationID, db, projectID, logger)
+			subSumMw, err := newEinoAgenticSummarizationMiddleware(ctx, subModel, appCfg, &ma.EinoMiddleware, conversationID, db, projectID, logger, "sub/"+id)
 			if err != nil {
 				return nil, fmt.Errorf("子代理 %q agentic summarization 中间件: %w", id, err)
 			}
@@ -488,7 +488,7 @@ func RunDeepAgent(
 		if perr != nil {
 			return nil, fmt.Errorf("plan_execute 执行器 AgenticModel: %w", perr)
 		}
-		planRewriteSumMw, perr := newEinoSummarizationMiddleware(ctx, execModel, appCfg, &ma.EinoMiddleware, conversationID, db, projectID, logger)
+		planRewriteSumMw, perr := newEinoSummarizationMiddleware(ctx, execModel, appCfg, &ma.EinoMiddleware, conversationID, db, projectID, logger, "plan_execute/planning")
 		if perr != nil {
 			return nil, fmt.Errorf("plan_execute planner/replanner summarization: %w", perr)
 		}
diff --git a/internal/project/blackboard.go b/internal/project/blackboard.go
index d1e2aec9..f93a0a98 100644
--- a/internal/project/blackboard.go
+++ b/internal/project/blackboard.go
@@ -49,31 +49,44 @@ func BuildFactIndexBlock(db *database.DB, projectID string, cfg config.ProjectCo
 	allEdges, _ := db.ListProjectFactEdgesByProject(projectID)
 	_, incomingByTarget := indexEdgeGroupMaps(allEdges)
 
+	maxRunes := cfg.FactIndexMaxRunesEffective()
+	header := fmt.Sprintf("## 项目黑板索引（project: %s, id: %s）\n", indexSingleLine(proj.Name), proj.ID)
 	if len(facts) == 0 {
-		return wrapFactIndexBlock(fmt.Sprintf("## 项目黑板索引（project: %s, id: %s）\n（暂无事实）\n%s", proj.Name, proj.ID, factIndexFooterEmpty)), nil
+		block := wrapFactIndexBlock(header + "（暂无事实）\n" + factIndexFooterEmpty)
+		if len([]rune(block)) <= maxRunes {
+			return block, nil
+		}
+		return minimalFactIndexBlock(maxRunes), nil
 	}
 
 	sortFactsForIndex(facts)
 
-	maxRunes := cfg.FactIndexMaxRunesEffective()
 	pathMaxRunes := cfg.FactIndexPathMaxRunesEffective()
 	footer := factIndexFooterGetDetail + "\n" + factIndexFooterWriteHint
-	footerRunes := len([]rune(footer))
-	factsBudget := maxRunes - pathMaxRunes - footerRunes
+	// Include markers, separators and the worst-case omission notice in the cap.
+	omissionReserve := len([]rune(factIndexOmissionNotice(len(facts))))
+	framingRunes := len([]rune(wrapFactIndexBlock(header+footer))) + omissionReserve
+	available := maxRunes - framingRunes
+	if available <= 0 {
+		return minimalFactIndexBlock(maxRunes), nil
+	}
+	if pathMaxRunes > available {
+		pathMaxRunes = available
+	}
+	factsBudget := available - pathMaxRunes
 	if factsBudget < 800 {
-		factsBudget = maxRunes - footerRunes
+		factsBudget = available
 		pathMaxRunes = 0
 	}
 
 	indexedKeys := make(map[string]struct{}, len(facts))
 	var b strings.Builder
-	b.WriteString(fmt.Sprintf("## 项目黑板索引（project: %s, id: %s）\n", proj.Name, proj.ID))
-	used := len([]rune(b.String()))
+	b.WriteString(header)
+	used := 0
 	omitted := 0
 
 	for _, f := range facts {
-		indexedKeys[f.FactKey] = struct{}{}
-		line := fmt.Sprintf("- [%s] %s — %s (%s)", f.FactKey, f.Category, strings.TrimSpace(f.Summary), f.Confidence)
+		line := fmt.Sprintf("- [%s] %s — %s (%s)", f.FactKey, f.Category, truncateIndexSummary(indexSingleLine(f.Summary), cfg.FactSummaryMaxRunesEffective()), f.Confidence)
 		line += FormatFactIndexLinksHint(f.FactKey, incomingByTarget[f.FactKey])
 		line += "\n"
 		lineRunes := len([]rune(line))
@@ -81,15 +94,16 @@ func BuildFactIndexBlock(db *database.DB, projectID string, cfg config.ProjectCo
 			omitted++
 			continue
 		}
+		indexedKeys[f.FactKey] = struct{}{}
 		b.WriteString(line)
 		used += lineRunes
 	}
 
 	if omitted > 0 {
-		b.WriteString(fmt.Sprintf("\n（另有 %d 条未列入索引，请使用 list_project_facts 或 search_project_facts 查询。）\n", omitted))
+		b.WriteString(factIndexOmissionNotice(omitted))
 	}
 
-	if pathSection := BuildFactPathOverviewSection(allEdges, indexedKeys, pathMaxRunes); pathSection != "" {
+	if pathSection := BuildFactPathOverviewSection(allEdges, indexedKeys, pathMaxRunes-1); len(indexedKeys) > 0 && pathSection != "" {
 		b.WriteString("\n")
 		b.WriteString(pathSection)
 	}
@@ -97,3 +111,25 @@ func BuildFactIndexBlock(db *database.DB, projectID string, cfg config.ProjectCo
 	b.WriteString(footer)
 	return wrapFactIndexBlock(b.String()), nil
 }
+
+func indexSingleLine(s string) string { return strings.Join(strings.Fields(s), " ") }
+
+func truncateIndexSummary(s string, maxRunes int) string {
+	runes := []rune(s)
+	if maxRunes > 0 && len(runes) > maxRunes {
+		return string(runes[:maxRunes-1]) + "…"
+	}
+	return s
+}
+
+func factIndexOmissionNotice(count int) string {
+	return fmt.Sprintf("\n（另有 %d 条未列入索引，请使用 list_project_facts 或 search_project_facts 查询。）\n", count)
+}
+
+func minimalFactIndexBlock(maxRunes int) string {
+	block := wrapFactIndexBlock("## 项目黑板索引\n索引预算不足；使用 list_project_facts 或 search_project_facts 按需查询。")
+	if len([]rune(block)) > maxRunes {
+		return ""
+	}
+	return block
+}
diff --git a/internal/project/blackboard_budget_test.go b/internal/project/blackboard_budget_test.go
new file mode 100644
index 00000000..d3f67e6b
--- /dev/null
+++ b/internal/project/blackboard_budget_test.go
@@ -0,0 +1,85 @@
+package project
+
+import (
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"cyberstrike-ai/internal/config"
+	"cyberstrike-ai/internal/database"
+	"go.uber.org/zap"
+)
+
+func TestFactIndexCapIncludesFramingAndDoesNotInjectBodies(t *testing.T) {
+	db, err := database.NewDB(filepath.Join(t.TempDir(), "facts.db"), zap.NewNop())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+	proj, err := db.CreateProject(&database.Project{Name: strings.Repeat("very long project ", 100)})
+	if err != nil {
+		t.Fatal(err)
+	}
+	for i, key := range []string{"target/core", "finding/key", "note/progress"} {
+		_, err = db.UpsertProjectFact(&database.ProjectFact{ProjectID: proj.ID, FactKey: key, Summary: strings.Repeat("old summary\n", 1000), Body: "SECRET_FULL_BODY", Category: strings.Split(key, "/")[0], Pinned: i == 0, Confidence: "confirmed"})
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	for _, cap := range []int{30, 100, 300, 700, 3500, 6500} {
+		block, err := BuildFactIndexBlock(db, proj.ID, config.ProjectConfig{Enabled: true, FactIndexMaxRunes: cap, FactIndexPathMaxRunes: 1000, FactSummaryMaxRunes: 120})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if n := len([]rune(block)); n > cap {
+			t.Fatalf("index has %d runes for cap %d", n, cap)
+		}
+		if strings.Contains(block, "SECRET_FULL_BODY") {
+			t.Fatal("full body leaked into index")
+		}
+		if block != "" && (!strings.HasPrefix(block, FactIndexSectionStartMarker) || !strings.Contains(block, FactIndexSectionEndMarker)) {
+			t.Fatalf("broken markers: %s", block)
+		}
+	}
+	projected, err := db.ListProjectFactsForIndex(proj.ID, false)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if projected[0].Body != "" {
+		t.Fatal("index query loads unused full bodies")
+	}
+	full, err := db.GetProjectFactByKey(proj.ID, "target/core")
+	if err != nil || full.Body != "SECRET_FULL_BODY" {
+		t.Fatalf("stored evidence altered: %v", err)
+	}
+}
+
+func TestFactIndexPathOverviewExcludesOmittedFact(t *testing.T) {
+	db, err := database.NewDB(filepath.Join(t.TempDir(), "facts.db"), zap.NewNop())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+	proj, err := db.CreateProject(&database.Project{Name: "scope"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, fact := range []*database.ProjectFact{
+		{ProjectID: proj.ID, FactKey: "target/visible", Category: "target", Summary: "visible"},
+		{ProjectID: proj.ID, FactKey: "finding/omitted", Category: strings.Repeat("huge category", 1000), Summary: "omitted"},
+	} {
+		if _, err := db.UpsertProjectFact(fact); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if _, err := db.AddProjectFactEdge(proj.ID, database.ProjectFactEdgeInput{To: "finding/omitted", Type: "discovered_on"}, "target/visible", ""); err != nil {
+		t.Fatal(err)
+	}
+	block, err := BuildFactIndexBlock(db, proj.ID, config.ProjectConfig{Enabled: true, FactIndexMaxRunes: 3500, FactIndexPathMaxRunes: 1000})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(block, "target/visible") || !strings.Contains(block, "另有 1 条") || strings.Contains(block, "target/visible → finding/omitted") {
+		t.Fatalf("omitted fact entered path overview: %s", block)
+	}
+}
diff --git a/internal/projectprompt/blackboard.go b/internal/projectprompt/blackboard.go
index 098efa0b..f6ede423 100644
--- a/internal/projectprompt/blackboard.go
+++ b/internal/projectprompt/blackboard.go
@@ -62,6 +62,7 @@ func factRecordingGuidanceBlock() string {
 - **category / fact_key 建议**：
   - 环境认知：` + "`target/`" + `、` + "`auth/`" + `、` + "`infra/`" + `、` + "`business/`" + `（body 用环境模板即可）
   - 发现与利用：` + "`finding/`" + `、` + "`chain/`" + `、` + "`exploit/`" + `、` + "`poc/`" + `（**必须**用攻击链模板填满 body：入口、逐步攻击链、原始请求/响应或命令、证据、关联漏洞 ID）
+- **自动续接记录**：` + "`note/context-*`" + ` 是压缩时保存的工作摘要，含来源会话与原始证据快照；用 ` + "`get_project_fact`" + ` 按需恢复进度。它不是已验证发现，接续时须核对当前授权范围与证据，勿据此自动执行旧任务。
 - **与漏洞记录分工**：` + "`record_vulnerability`" + ` 记可交付 findings；事实记**复现所需的全部上下文**（含失败尝试、绕过、依赖会话），二者可各记一次。
 - 更新同一发现时保持相同 ` + "`fact_key`" + ` 覆盖写入，勿散落多个 key 导致上下文丢失。`
 }