diff --git a/api/openapi.yaml b/api/openapi.yaml
index aecfad0..b5d9f3e 100644
--- a/api/openapi.yaml
+++ b/api/openapi.yaml
@@ -1547,6 +1547,58 @@
     }
    }
   },
+  "/api/v1/library/baselines": {
+   "post": {
+    "tags": [
+     "Runtime"
+    ],
+    "operationId": "startLibraryBaseline",
+    "summary": "建立目标权威基线：管理员在维护隔离下把非空目标整库捕获成快照、逐类校验后登记为生效版本；不清空目标、不手写版本",
+    "responses": {
+     "202": {
+      "description": "已创建基线作业（worker 在维护窗口内捕获并校验）"
+     },
+     "400": {
+      "$ref": "#/components/responses/BadRequest"
+     },
+     "403": {
+      "description": "不是管理员"
+     },
+     "409": {
+      "description": "已有生效版本、目标为空、目标正在维护或已有在飞写作业"
+     },
+     "500": {
+      "$ref": "#/components/responses/InternalError"
+     },
+     "503": {
+      "description": "目标整库读不到，不能建立基线（不创建作业、不登记版本）"
+     }
+    },
+    "requestBody": {
+     "required": true,
+     "content": {
+      "application/json": {
+       "schema": {
+        "type": "object",
+        "additionalProperties": false,
+        "required": [
+         "scope"
+        ],
+        "properties": {
+         "scope": {
+          "type": "string",
+          "enum": [
+           "internal",
+           "external"
+          ]
+         }
+        }
+       }
+      }
+     }
+    }
+   }
+  },
   "/api/v1/library/snapshots/{id}": {
    "get": {
     "tags": [
diff --git a/cmd/api/main.go b/cmd/api/main.go
index 0a652f3..163a637 100644
--- a/cmd/api/main.go
+++ b/cmd/api/main.go
@@ -203,6 +203,12 @@ func run(ctx context.Context, getenv func(string) string) error {
 		VersionHistoryRepo:           versionHistoryRepo,
 		LibraryArchiveRoot:           config.LibraryArchiveRoot,
 		LibraryTargetInstance:        config.LibraryTargetInstance,
+		LibraryTargetProject:         config.LibraryTargetProject,
+		LibraryTargetWriters:         config.LibraryTargetWriters,
+		LibraryTargetIngressURL:      config.LibraryTargetIngressURL,
+		LibraryTargetIngressService:  config.LibraryTargetIngressService,
+		LibraryTargetDockerSocket:    config.LibraryTargetDockerSocket,
+		LibraryTargetJournalRoot:     config.LibraryTargetJournalRoot,
 		LibrarySourceInstance:        config.SourceInstance(),
 		LibrarySourceProject:         config.SourceProject(),
 		LibraryAgentSocket:           config.LibraryAgentSocket,
diff --git a/cmd/worker/library_baseline.go b/cmd/worker/library_baseline.go
new file mode 100644
index 0000000..0dab748
--- /dev/null
+++ b/cmd/worker/library_baseline.go
@@ -0,0 +1,227 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"log"
+	"time"
+
+	"knowledge-governance/internal/appconfig"
+	"knowledge-governance/internal/governance"
+	"knowledge-governance/internal/jobs"
+	"knowledge-governance/internal/libraryfreeze"
+	"knowledge-governance/internal/librarymaintenance"
+	"knowledge-governance/internal/libraryrelease"
+	postgresstore "knowledge-governance/internal/platform/postgres"
+)
+
+// libraryBaselinePayload 是"建立目标权威基线"的队列载荷。
+type libraryBaselinePayload struct {
+	LibraryJobID string `json:"library_job_id"`
+	Scope        string `json:"scope"`
+}
+
+// runLibraryBaseline 给"非空但没有权威版本"的目标建立基线。
+//
+// 真实链路：维护隔离（关入口/停写入者/证明排空）→ 把目标整库捕获成归档快照
+// → 用同一套 Verify 证明目标与这份快照逐类一致 → 登记 production_effective。
+// 它不写目标内容、不清空目标、不猜版本：基线只是"目标现在是什么"的忠实记录，
+// 因此失败时重新开放目标永远是安全的（allowRestore 恒 true）。
+func runLibraryBaseline(ctx context.Context, store *postgresstore.Store, config appconfig.Config, job jobs.Job) error {
+	var payload libraryBaselinePayload
+	if err := json.Unmarshal(job.Payload, &payload); err != nil || payload.LibraryJobID == "" ||
+		(payload.Scope != "internal" && payload.Scope != "external") {
+		return errors.New("invalid library baseline payload")
+	}
+	now := time.Now().UTC()
+	recorder := libraryStageRecorder{store: store, jobID: payload.LibraryJobID, scope: payload.Scope}
+	fail := func(message, stage string) error {
+		return failLibraryJob(ctx, store, recorder, payload.LibraryJobID, message, stage)
+	}
+	_ = store.AdvanceLibraryJob(ctx, payload.LibraryJobID, governance.LibraryJobRunning, "capture", "", "", "", "", now)
+
+	// 已有生效版本时不再建基线：基线只解决"目标非空但无权威版本"的首次发布，
+	// 版本切换必须走同步/恢复（它们有预备份、回滚与授权）。
+	versions, versionErr := store.LibraryVersions(ctx, payload.Scope, 50)
+	if versionErr != nil {
+		return fail("读不到版本记录，无法确认是否需要建立基线；未对目标执行任何操作", "capture")
+	}
+	for _, item := range versions {
+		if item.Kind == governance.LibraryVersionProductionEffective && item.SupersededAt == nil {
+			return fail("该目标已有生效版本 "+item.SnapshotID+"，不需要再建基线；换版本请走同步或恢复", "capture")
+		}
+	}
+
+	if !config.ProductionReleaseRequestsEnabled {
+		return fail("生产写入闸口关闭（PRODUCTION_RELEASE_REQUESTS_ENABLED=false）：建立基线要动目标运行状态，闸口关闭时不执行", "capture")
+	}
+	target, backups, wireErr := buildLibraryBaselineStack(ctx, config, payload.Scope)
+	if wireErr != nil {
+		return fail(wireErr.Error(), "capture")
+	}
+	defer target.Close()
+
+	manager, managerErr := openLibraryMaintenance(config)
+	if managerErr != nil {
+		return fail("目标维护未接线，拒绝在挡不住入口/后台写入的情况下捕获目标："+managerErr.Error(), "capture")
+	}
+	defer manager.Close()
+	if topoErr := manager.VerifyTopology(ctx); topoErr != nil {
+		return fail("目标拓扑不满足唯一入口约束，拒绝开维护窗口："+topoErr.Error(), "capture")
+	}
+	originalState, stateErr := manager.OriginalState(ctx)
+	if stateErr != nil {
+		return fail("读不到目标写入者的原运行状态，不能开维护窗口："+stateErr.Error(), "capture")
+	}
+	identity := manager.Target()
+	// 实例级占用：internal/external 动的是同一批容器，必须按实例互斥。
+	if _, instanceErr := store.AcquireInstanceMaintenance(ctx, postgresstore.LibraryInstanceMaintenance{
+		Instance: identity.Instance, OwnerJobID: payload.LibraryJobID, OwnerScope: payload.Scope,
+		TargetFingerprint: identity.Fingerprint, Level: librarymaintenance.LevelInstance,
+		Services: identity.Writers, IngressState: "unknown", State: "acquired",
+		OriginalServiceState: originalState,
+		Note:                 "实例级维护：为建立权威基线捕获目标整库，捕获并校验后按原状态恢复",
+	}, now); instanceErr != nil {
+		return fail("目标实例正在维护中（跨对内/对外互斥）："+instanceErr.Error(), "capture")
+	}
+	if _, acquireErr := store.AcquireLibraryMaintenance(ctx, postgresstore.LibraryMaintenance{
+		Scope: payload.Scope, OwnerJobID: payload.LibraryJobID,
+		TargetIdentity:       identity.Fingerprint,
+		Level:                "instance",
+		TargetFingerprint:    identity.Fingerprint,
+		Services:             identity.Writers,
+		IngressState:         "unknown",
+		State:                "acquired",
+		OriginalServiceState: originalState,
+		Note:                 "实例级维护：为建立权威基线捕获目标整库，捕获并校验后按原状态恢复",
+	}, now); acquireErr != nil {
+		_ = store.UpdateInstanceMaintenanceState(ctx, identity.Instance, payload.LibraryJobID, "needs_restore",
+			"scope 占用申请失败，实例状态未确认："+acquireErr.Error(), now)
+		return fail("目标正在维护中："+acquireErr.Error(), "capture")
+	}
+
+	coordinator, control, openErr := manager.Open(config.LibraryTargetJournalRoot)
+	if openErr != nil {
+		_ = releaseWindowLocks(ctx, store, identity.Instance, payload.Scope, payload.LibraryJobID,
+			"未进入维护窗口（协调器不可用），目标未被停用", time.Now().UTC())
+		return fail("维护协调器不可用："+openErr.Error(), "capture")
+	}
+	defer control.Close()
+	defer coordinator.Close()
+
+	var baselineID string
+	var counts map[string]int64
+	verified := false
+	work := func(ctx context.Context, window *libraryfreeze.Window) (string, error) {
+		current, currentErr := target.Current(ctx)
+		if currentErr != nil {
+			return "", errors.New("读取目标当前整库状态失败：" + currentErr.Error())
+		}
+		counts = map[string]int64{}
+		for table, count := range current.Counts {
+			counts[table] = count
+		}
+		// 预备份存储在导出后用同一份指纹复核"导出期间内容没变"，所以这里
+		// 必须把窗口内读到的 state 交进去，而不是事后再读一次。
+		backup, backupErr := backups.Prepare(ctx, "", current)
+		if backupErr != nil {
+			return "", errors.New("捕获目标整库失败：" + backupErr.Error())
+		}
+		baselineID = backup.SnapshotID
+		// 先把"这次窗口的基线快照"落盘：进程在这里被杀时，恢复器知道该回到哪一份，
+		// 而不是把目标留在停机状态且没有任何可核对的基线。
+		if markErr := window.SetBackupSnapshot(ctx, baselineID); markErr != nil {
+			return "", errors.New("记录基线快照身份失败：" + markErr.Error())
+		}
+		// 作业行也要立刻带上这份快照身份：worker 被杀后接管/按预备份恢复都靠它，
+		// 否则"目标停着、却不知道拿哪一份核对"会让目标一直卡在维护里。
+		if persistErr := store.AdvanceLibraryJob(ctx, payload.LibraryJobID, governance.LibraryJobRunning, "",
+			"", "", baselineID, "", time.Now().UTC()); persistErr != nil {
+			return "", errors.New("持久化基线快照引用失败：" + persistErr.Error())
+		}
+		recorder.Stage(ctx, "capture", "succeeded", "已封存目标整库快照 "+baselineID)
+		recorder.Stage(ctx, "verify", "running", "逐表/索引/资源比对目标与刚封存的快照")
+		if verifyErr := target.Verify(ctx, libraryrelease.Expectation{SnapshotID: baselineID}); verifyErr != nil {
+			return "", errors.New("目标内容与刚封存的快照不一致，拒绝登记基线：" + verifyErr.Error())
+		}
+		verified = true
+		recorder.Stage(ctx, "verify", "succeeded", "行身份/逐行内容/索引文档/资源摘要与快照一致")
+		return baselineID, nil
+	}
+
+	actor := ""
+	if libJob, jobErr := store.LibraryJob(ctx, payload.LibraryJobID); jobErr == nil {
+		actor = libJob.Actor
+	}
+	window, windowErr := coordinator.RunWindow(ctx, payload.LibraryJobID,
+		func(ctx context.Context) error { return manager.VerifyRunning(ctx) }, work,
+		func(error) bool { return true })
+
+	now2 := time.Now().UTC()
+	if !verified || window.State != "succeeded" {
+		message := "未建立基线：维护窗口没有完成捕获与校验"
+		if windowErr != nil {
+			message += "：" + windowErr.Error()
+		}
+		if window.State == "held" {
+			// 目标仍被占用：内容状态未知只能按维护保持，等"按预备份恢复"收尾。
+			note := message + "（目标保持维护）"
+			_ = store.UpdateLibraryMaintenanceState(ctx, payload.Scope, payload.LibraryJobID, "needs_restore", note, now2)
+			_ = store.UpdateInstanceMaintenanceState(ctx, identity.Instance, payload.LibraryJobID, "needs_restore", note, now2)
+			recorder.Stage(ctx, "capture", "failed", note)
+			_ = store.AdvanceLibraryJob(ctx, payload.LibraryJobID, governance.LibraryJobFailed, "capture", note,
+				"按预备份恢复并校验后再重试", baselineID, "", now2)
+			return errors.New(note)
+		}
+		// 没有写过目标：重新开放占用是安全的，窗口也已按原状态恢复。
+		if releaseErr := releaseWindowLocks(ctx, store, identity.Instance, payload.Scope, payload.LibraryJobID,
+			"未建立基线，目标未被改动", now2); releaseErr != nil {
+			return fmt.Errorf("%s；维护占用释放失败: %w", message, releaseErr)
+		}
+		recorder.Stage(ctx, "capture", "failed", message)
+		_ = store.AdvanceLibraryJob(ctx, payload.LibraryJobID, governance.LibraryJobFailed, "capture", message,
+			"未对目标执行任何写入，可直接重试", baselineID, "", now2)
+		return errors.New(message)
+	}
+
+	// 校验通过 → 登记权威基线。证据里记的是这份快照本身、逐表行数与目标索引映射；
+	// created_by 用发起人（管理员），不是 worker 自封。
+	recorder.Stage(ctx, "finalize", "running", "登记目标权威基线")
+	mapping, _ := target.Search().MappingSHA256(ctx)
+	versionErr = store.RecordLibraryVersion(ctx, governance.LibraryVersion{
+		ID:    governance.LibraryVersionID(governance.LibraryVersionProductionEffective, payload.Scope, baselineID),
+		Scope: payload.Scope, Kind: governance.LibraryVersionProductionEffective,
+		SnapshotID: baselineID, SourceJobID: payload.LibraryJobID, CreatedBy: actor,
+		Evidence: map[string]any{
+			"action":               "target_baseline_init",
+			"origin":               "target_baseline",
+			"baseline_snapshot":    baselineID,
+			"index_mapping_sha256": mapping,
+			"scope_content_counts": counts,
+			"verification":         "目标与快照逐表行身份/逐行内容/索引文档/资源摘要一致",
+			"note":                 "基线是目标在维护窗口内的真实整库捕获，不是手写版本；发布仍需独立 sync 授权",
+		},
+		CreatedAt: now2,
+	})
+	if versionErr != nil {
+		message := "目标已捕获并校验，但基线版本登记失败：" + versionErr.Error()
+		recorder.Stage(ctx, "finalize", "failed", message)
+		_ = store.UpdateLibraryMaintenanceState(ctx, payload.Scope, payload.LibraryJobID, "needs_restore", message, now2)
+		_ = store.UpdateInstanceMaintenanceState(ctx, identity.Instance, payload.LibraryJobID, "needs_restore", message, now2)
+		_ = store.AdvanceLibraryJob(ctx, payload.LibraryJobID, governance.LibraryJobFailed, "finalize", message,
+			"基线快照 "+baselineID+" 保留；修好治理库后可续作登记", baselineID, "", time.Now().UTC())
+		return errors.New(message)
+	}
+	recorder.Stage(ctx, "finalize", "succeeded", "已登记目标权威基线 "+baselineID)
+
+	// 成功要等目标服务、入口与两把维护锁都落定才暴露。
+	if finishErr := finishLibrarySuccess(ctx, store, manager, identity.Instance, payload.Scope,
+		payload.LibraryJobID, successBoundary{Ready: true, Backup: baselineID, FinishedAt: time.Now().UTC()}); finishErr != nil {
+		return finishErr
+	}
+	log.Printf("library baseline succeeded job=%s scope=%s snapshot=%s actor=%s",
+		payload.LibraryJobID, payload.Scope, baselineID, actor)
+	return nil
+}
diff --git a/cmd/worker/library_handlers.go b/cmd/worker/library_handlers.go
index 331c6eb..795817e 100644
--- a/cmd/worker/library_handlers.go
+++ b/cmd/worker/library_handlers.go
@@ -480,8 +480,13 @@ func resumeInterruptedLibraryJobs(ctx context.Context, store *postgresstore.Stor
 			continue
 		}
 		queueType := librarySyncJobType
-		if job.Kind == governance.LibraryJobRestore {
+		switch job.Kind {
+		case governance.LibraryJobRestore:
 			queueType = libraryRestoreJobType
+		case governance.LibraryJobBaseline:
+			// 基线作业被杀时窗口可能还停着目标：用同一个作业 id 接管那个窗口，
+			// 继续捕获/校验，而不是留下一个 held 目标等人工处理。
+			queueType = libraryBaselineJobType
 		}
 		payload, _ := json.Marshal(map[string]string{"library_job_id": job.ID, "scope": job.Scope,
 			"target_snapshot_id": job.TargetSnapshotID})
diff --git a/cmd/worker/library_wiring.go b/cmd/worker/library_wiring.go
index b4a6dfc..74f4aa6 100644
--- a/cmd/worker/library_wiring.go
+++ b/cmd/worker/library_wiring.go
@@ -11,11 +11,15 @@ import (
 	v071 "knowledge-governance/internal/releaseadapter/v071"
 )
 
-// buildLibraryProductionStack 用部署注入的配置装配生产整库目标与独立预备份存储。
-// 任何一项缺失都返回明确原因，调用方据此把作业失败并把缺项写进阶段，
-// 不用"未配置"的占位对象假装能跑。
-func buildLibraryProductionStack(ctx context.Context, config appconfig.Config, scope, snapshotID, knownMapping string) (
-	*v071.ProductionLibraryTarget, *v071.ProductionBackupStore, error) {
+// productionScopeConfig 是"某个 scope 的生产整库目标"的部署注入配置。
+// 校验、错误措辞与 S3 参数只在这里有一份：同步、恢复与基线共用同一套装配，
+// 不允许任何一条路径自己拼一份（那会让"目标是谁"随路径漂移）。
+type productionScopeConfig struct {
+	target v071.ProductionScope
+	s3     v071.S3ObjectStoreConfig
+}
+
+func productionScopeOf(ctx context.Context, config appconfig.Config, scope string) (productionScopeConfig, error) {
 	missing := make([]string, 0, 4)
 	if config.LibraryProductionDatabaseURL == "" {
 		missing = append(missing, "LIBRARY_PRODUCTION_DATABASE_URL")
@@ -38,26 +42,53 @@ func buildLibraryProductionStack(ctx context.Context, config appconfig.Config, s
 		missing = append(missing, "LIBRARY_PRODUCTION_S3_ENDPOINT/BUCKET/ACCESS_KEY/SECRET_KEY")
 	}
 	if len(missing) > 0 {
-		return nil, nil, fmt.Errorf("生产整库目标未配置：缺少 %s", strings.Join(missing, "、"))
+		return productionScopeConfig{}, fmt.Errorf("生产整库目标未配置：缺少 %s", strings.Join(missing, "、"))
 	}
-	secure := strings.HasPrefix(config.LibraryProductionS3Endpoint, "https://")
-	objects, err := v071.NewS3ObjectStore(v071.S3ObjectStoreConfig{
-		Provider: config.LibraryProductionS3Provider, Endpoint: config.LibraryProductionS3Endpoint,
-		Region: config.LibraryProductionS3Region, Bucket: config.LibraryProductionS3Bucket,
-		AccessKeyID: config.LibraryProductionS3AccessKey, SecretAccessKey: config.LibraryProductionS3SecretKey,
-		Secure: secure, ForcePathStyle: true, MaxObjectBytes: 256 * 1024 * 1024,
-	})
+	return productionScopeConfig{
+		target: v071.ProductionScope{TenantID: config.LibraryProductionTenantID, KnowledgeBaseID: kb},
+		s3: v071.S3ObjectStoreConfig{
+			Provider: config.LibraryProductionS3Provider, Endpoint: config.LibraryProductionS3Endpoint,
+			Region: config.LibraryProductionS3Region, Bucket: config.LibraryProductionS3Bucket,
+			AccessKeyID: config.LibraryProductionS3AccessKey, SecretAccessKey: config.LibraryProductionS3SecretKey,
+			Secure:         strings.HasPrefix(config.LibraryProductionS3Endpoint, "https://"),
+			ForcePathStyle: true, MaxObjectBytes: 256 * 1024 * 1024,
+		},
+	}, nil
+}
+
+func newProductionTarget(ctx context.Context, config appconfig.Config, scope productionScopeConfig) (*v071.ProductionLibraryTarget, error) {
+	objects, err := v071.NewS3ObjectStore(scope.s3)
 	if err != nil {
-		return nil, nil, errors.New("生产对象存储配置无效")
+		return nil, errors.New("生产对象存储配置无效")
 	}
-	identity := v071.ProductionScope{TenantID: config.LibraryProductionTenantID, KnowledgeBaseID: kb}
-	target, err := v071.NewProductionLibraryTarget(ctx, v071.ProductionLibraryConfig{
+	return v071.NewProductionLibraryTarget(ctx, v071.ProductionLibraryConfig{
 		Postgres: config.LibraryProductionDatabaseURL, SearchURL: config.LibraryProductionElasticURL,
 		SearchIndex: config.LibraryProductionIndex, Objects: objects, ObjectsReader: objects,
 		ArchiveRoot:   config.LibraryArchiveRoot,
 		ObjectsBucket: config.LibraryProductionS3Bucket,
 		MaxDocuments:  200000,
-	}, identity)
+	}, scope.target)
+}
+
+func newProductionBackupStore(config appconfig.Config, scope string,
+	target *v071.ProductionLibraryTarget, contract librarysnapshot.Compatibility) (*v071.ProductionBackupStore, error) {
+	return v071.NewProductionBackupStore(v071.ProductionBackupConfig{
+		Pool: target.Pool(), Search: target.Search(), Objects: target.Objects(),
+		ArchiveRoot: config.LibraryArchiveRoot, Scope: scope, Identity: target.Identity(),
+		Compatibility: contract, MaxDocuments: 200000, MaxObjectByte: 256 * 1024 * 1024,
+	})
+}
+
+// buildLibraryProductionStack 用部署注入的配置装配生产整库目标与独立预备份存储。
+// 任何一项缺失都返回明确原因，调用方据此把作业失败并把缺项写进阶段，
+// 不用"未配置"的占位对象假装能跑。
+func buildLibraryProductionStack(ctx context.Context, config appconfig.Config, scope, snapshotID, knownMapping string) (
+	*v071.ProductionLibraryTarget, *v071.ProductionBackupStore, error) {
+	scopeConfig, err := productionScopeOf(ctx, config, scope)
+	if err != nil {
+		return nil, nil, err
+	}
+	target, err := newProductionTarget(ctx, config, scopeConfig)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -105,11 +136,43 @@ func buildLibraryProductionStack(ctx context.Context, config appconfig.Config, s
 	if knownMapping != "" {
 		backupContract.IndexMappingSHA256 = knownMapping
 	}
-	backups, err := v071.NewProductionBackupStore(v071.ProductionBackupConfig{
-		Pool: target.Pool(), Search: target.Search(), Objects: target.Objects(),
-		ArchiveRoot: config.LibraryArchiveRoot, Scope: scope, Identity: target.Identity(),
-		Compatibility: backupContract, MaxDocuments: 200000, MaxObjectByte: 256 * 1024 * 1024,
-	})
+	backups, err := newProductionBackupStore(config, scope, target, backupContract)
+	if err != nil {
+		target.Close()
+		return nil, nil, err
+	}
+	return target, backups, nil
+}
+
+// buildLibraryBaselineStack 装配"给目标自己建基线"所需的目标与捕获器。
+//
+// 与同步的差别只有契约来源：同步要拿**待发布快照**的兼容性做契约，而基线
+// 还没有快照——它要捕获的正是目标当前状态，所以契约取目标此刻的真实索引映射，
+// 绝不去借一份别人的快照来当契约（那会把基线登记成"与某份快照一致"的假象）。
+func buildLibraryBaselineStack(ctx context.Context, config appconfig.Config, scope string) (
+	*v071.ProductionLibraryTarget, *v071.ProductionBackupStore, error) {
+	scopeConfig, err := productionScopeOf(ctx, config, scope)
+	if err != nil {
+		return nil, nil, err
+	}
+	target, err := newProductionTarget(ctx, config, scopeConfig)
+	if err != nil {
+		return nil, nil, err
+	}
+	mapping, mapErr := target.Search().MappingSHA256(ctx)
+	if mapErr != nil {
+		target.Close()
+		return nil, nil, fmt.Errorf("读取目标索引映射失败，无法确定基线契约: %w", mapErr)
+	}
+	// 只写能证明的字段：embedding 配置来自部署声明（与目标实例同一份配置），
+	// 索引映射来自目标此刻的真实映射。目标实例的 WeKnora/schema 版本这里没有
+	// 可靠来源，就不填——空白比编一个数字诚实，迁移/兼容判断不会因此放行任何东西。
+	contract := librarysnapshot.Compatibility{
+		EmbeddingModel:     config.LibraryEmbeddingModel,
+		EmbeddingDimension: config.LibraryEmbeddingDimension,
+		IndexMappingSHA256: mapping,
+	}
+	backups, err := newProductionBackupStore(config, scope, target, contract)
 	if err != nil {
 		target.Close()
 		return nil, nil, err
diff --git a/cmd/worker/main.go b/cmd/worker/main.go
index e72aaf2..acdefac 100644
--- a/cmd/worker/main.go
+++ b/cmd/worker/main.go
@@ -93,6 +93,9 @@ const libraryRecoverJobType = "library.recover"
 // libraryRestoreJobType 是按指定整库版本恢复的队列类型；与同步分开、授权也分开。
 const libraryRestoreJobType = "library.restore"
 
+// libraryBaselineJobType 是"建立目标权威基线"的队列类型（与 API 侧常量同值）。
+const libraryBaselineJobType = "library.baseline"
+
 func main() {
 	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
 	defer stop()
@@ -326,6 +329,10 @@ func workerHandlers(store *postgresstore.Store, config appconfig.Config) (map[st
 		handlers[libraryRestoreJobType] = func(ctx context.Context, job jobs.Job) error {
 			return runLibraryRelease(ctx, store, config, job, governance.LibraryJobRestore)
 		}
+		// 建立目标权威基线：目标非空又没有生效版本时的唯一入口（只读捕获 + 校验 + 登记）。
+		handlers[libraryBaselineJobType] = func(ctx context.Context, job jobs.Job) error {
+			return runLibraryBaseline(ctx, store, config, job)
+		}
 		// A crash can leave the source writer stopped: recover before taking work,
 		// and keep the failure visible instead of pretending the worker is ready.
 		go func() {
diff --git a/internal/governance/library_flow.go b/internal/governance/library_flow.go
index ed8bb7b..7e6b440 100644
--- a/internal/governance/library_flow.go
+++ b/internal/governance/library_flow.go
@@ -31,6 +31,10 @@ const (
 	LibraryJobSync LibraryJobKind = "sync"
 	// LibraryJobRestore 是按指定整库版本恢复：与同步分开，授权与阶段也独立。
 	LibraryJobRestore LibraryJobKind = "restore"
+	// LibraryJobBaseline 建立首次发布目标的权威基线：在维护隔离下把目标整库
+	// 读出来封存成快照并逐类校验，再登记成 production_effective。
+	// 它不写目标内容、不清空目标、不猜版本——基线只能来自真实捕获与校验。
+	LibraryJobBaseline LibraryJobKind = "baseline"
 )
 
 type LibraryJobState string
@@ -134,6 +138,12 @@ func SealStages() []string {
 	return []string{"export"}
 }
 
+// BaselineStages 是"建立目标权威基线"的阶段：捕获目标整库 → 与快照逐类校验
+// → 登记生效版本。没有 rollback 阶段：基线过程不写目标内容。
+func BaselineStages() []string {
+	return []string{"capture", "verify", "finalize"}
+}
+
 // LibraryReleaseAuthorization 是生产发布授权：绑定目标、快照、参数摘要与有效期。
 type LibraryReleaseAuthorization struct {
 	ID           string     `json:"id"`
diff --git a/internal/httpapi/library_baseline.go b/internal/httpapi/library_baseline.go
new file mode 100644
index 0000000..a96e803
--- /dev/null
+++ b/internal/httpapi/library_baseline.go
@@ -0,0 +1,150 @@
+package httpapi
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"time"
+
+	"knowledge-governance/internal/governance"
+	"knowledge-governance/internal/jobs"
+	postgresstore "knowledge-governance/internal/platform/postgres"
+)
+
+// 建立目标权威基线：首次发布时目标已经有内容，却没有生效版本记录。
+//
+// 唯一诚实的解法是"维护隔离 + 真实整库捕获 + 逐类校验 + 登记版本"：
+//   - 不手写 production_effective，不伪造验收；
+//   - 不清空目标换库绕过（那会把"非空但未知"变成"空"）；
+//   - 页面只投递作业，停写入者、捕获、校验都在 worker 里执行。
+//
+// 这个入口只建作业，不签发发布授权：基线不等于发布，同步仍然要单独的 sync 授权。
+const libraryBaselineJobType = "library.baseline"
+
+type libraryBaselineRequest struct {
+	Scope string `json:"scope"`
+}
+
+func libraryBaselineEnqueue(w http.ResponseWriter, r *http.Request, config Config) {
+	if r.Method != http.MethodPost {
+		writeJSON(w, http.StatusMethodNotAllowed, map[string]string{"error": "method not allowed"})
+		return
+	}
+	identity, ok := sessionFrom(r.Context())
+	if !ok || roleRank(identity.Role) < roleRank(roleAdmin) {
+		writeJSON(w, http.StatusForbidden, map[string]any{"error": "建立目标权威基线仅管理员可发起"})
+		return
+	}
+	var request libraryBaselineRequest
+	if err := json.NewDecoder(http.MaxBytesReader(w, r.Body, 4096)).Decode(&request); err != nil {
+		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid request body"})
+		return
+	}
+	if request.Scope != "internal" && request.Scope != "external" {
+		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "scope must be internal or external"})
+		return
+	}
+	store, ok := libraryStore(config)
+	if !ok {
+		writeJSON(w, http.StatusServiceUnavailable, map[string]any{"code": "library_baseline_unavailable",
+			"error": "版本登记存储不可用"})
+		return
+	}
+	versions, err := store.LibraryVersions(r.Context(), request.Scope, 50)
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "cannot read library versions"})
+		return
+	}
+	for _, item := range versions {
+		if item.Kind == governance.LibraryVersionProductionEffective && item.SupersededAt == nil {
+			writeJSON(w, http.StatusConflict, map[string]any{"code": "library_baseline_exists",
+				"error":       "该目标已有生效版本，不需要再建基线；换版本请走同步或恢复",
+				"snapshot_id": item.SnapshotID})
+			return
+		}
+	}
+	// 目标必须真的读得到：读不到就不是"非空无权威版本"，而是另一个问题，
+	// 不允许用建基线去掩盖连接/配置故障。
+	empty, counts, probeErr := productionScopeState(r.Context(), config, request.Scope)
+	if probeErr != nil {
+		writeJSON(w, http.StatusServiceUnavailable, map[string]any{"code": "library_baseline_unprobeable",
+			"error": "无法读取目标整库状态，不能建立基线：" + probeErr.Error()})
+		return
+	}
+	if empty {
+		writeJSON(w, http.StatusConflict, map[string]any{"code": "library_baseline_target_empty",
+			"error":  "目标整库为空，不需要基线：首次同步会在写入前生成完整预备份并登记生效版本",
+			"counts": counts})
+		return
+	}
+	// 维护互斥与同步一致：基线要在目标上开维护窗口，目标正在维护时直接拒绝。
+	if body, held := instanceMaintenanceGuard(r.Context(), config, request.Scope); held {
+		writeJSON(w, http.StatusConflict, body)
+		return
+	}
+	if maintenanceStore, ok := config.Store.(interface {
+		LibraryMaintenanceOf(ctx context.Context, scope string) (*postgresstore.LibraryMaintenance, error)
+	}); ok {
+		if held, err := maintenanceStore.LibraryMaintenanceOf(r.Context(), request.Scope); err == nil && held != nil && held.ReleasedAt == nil {
+			writeJSON(w, http.StatusConflict, map[string]any{"code": "library_target_in_maintenance",
+				"error":     "目标正在维护中，验证完成前不接受新的写入请求",
+				"owner_job": held.OwnerJobID, "state": held.State})
+			return
+		}
+	}
+	digest, err := governance.LibraryRequestDigest(request.Scope, governance.LibraryJobBaseline,
+		map[string]any{"scope": request.Scope})
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "cannot digest request"})
+		return
+	}
+	now := time.Now().UTC()
+	job, reused, err := store.CreateLibraryJob(r.Context(), governance.LibraryJob{
+		ID: fmt.Sprintf("libbase-%s-%d", request.Scope, now.UnixNano()), Scope: request.Scope,
+		Kind:           governance.LibraryJobBaseline,
+		IdempotencyKey: "library.baseline:" + request.Scope + ":" + now.Format("20060102T150405.000000000"),
+		RequestDigest:  digest, Actor: identity.Username,
+	}, governance.BaselineStages(), now)
+	if errors.Is(err, governance.ErrLibraryJobActive) {
+		writeJSON(w, http.StatusConflict, map[string]any{"code": "library_write_active",
+			"error": "该目标已有在飞的写作业（同步/恢复/基线互斥），等它结束再发起"})
+		return
+	}
+	if errors.Is(err, governance.ErrLibraryJobIdempotencyConflict) {
+		writeJSON(w, http.StatusConflict, map[string]any{"code": "library_baseline_conflict",
+			"error": "同一幂等键对应了不同的请求"})
+		return
+	}
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "cannot create library baseline job"})
+		return
+	}
+	if reused {
+		writeJSON(w, http.StatusAccepted, map[string]any{"job": job, "reused": true})
+		return
+	}
+	payload, err := json.Marshal(map[string]string{"library_job_id": job.ID, "scope": request.Scope})
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "cannot build baseline payload"})
+		return
+	}
+	queueJob, err := config.Store.Enqueue(r.Context(), jobs.EnqueueRequest{
+		ID: governance.QueueJobIDFor(job.ID), Type: libraryBaselineJobType, Payload: payload,
+		AvailableAt: now, MaxAttempts: 1, IdempotencyKey: "library.baseline.queue:" + job.ID,
+	}, now)
+	if err != nil || queueJob == nil {
+		// 作业先落库、队列投递失败就把作业取消：不留下"看起来在跑"的空作业，
+		// 否则它会一直占着该 scope 的写互斥。
+		_ = store.CancelLibraryJob(r.Context(), job.ID, "队列投递失败，未开始建立基线", now)
+		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "cannot enqueue baseline job"})
+		return
+	}
+	if attachErr := store.AttachLibraryQueueJob(r.Context(), job.ID, queueJob.ID, now); attachErr != nil {
+		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "cannot attach baseline job"})
+		return
+	}
+	writeJSON(w, http.StatusAccepted, map[string]any{"job": job, "reused": false,
+		"target_counts": counts})
+}
diff --git a/internal/httpapi/library_baseline_test.go b/internal/httpapi/library_baseline_test.go
new file mode 100644
index 0000000..ce83293
--- /dev/null
+++ b/internal/httpapi/library_baseline_test.go
@@ -0,0 +1,162 @@
+package httpapi
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
+	"knowledge-governance/internal/governance"
+)
+
+// 建立目标权威基线的入口契约：
+//   - 只有管理员能发起（它是生产侧维护动作）；
+//   - 已有生效版本时拒绝（基线只解决首次发布）；
+//   - 目标读不到时拒绝，且**不建作业、不登记版本**（不能用基线掩盖连接问题）。
+
+func baselineRequest(body, role, username string) *http.Request {
+	request := httptest.NewRequest(http.MethodPost, "/api/v1/library/baselines", strings.NewReader(body))
+	request.Header.Set("Content-Type", "application/json")
+	ctx := context.WithValue(request.Context(), sessionKey{}, sessionIdentity{Username: username, Role: role})
+	return request.WithContext(ctx)
+}
+
+func decodeBody(t *testing.T, recorder *httptest.ResponseRecorder) map[string]any {
+	t.Helper()
+	var payload map[string]any
+	if err := json.Unmarshal(recorder.Body.Bytes(), &payload); err != nil {
+		t.Fatalf("response is not JSON: %s", recorder.Body.String())
+	}
+	return payload
+}
+
+func TestLibraryBaselineRequiresAdmin(t *testing.T) {
+	store := &fakeLibraryStore{}
+	recorder := httptest.NewRecorder()
+	libraryBaselineEnqueue(recorder, baselineRequest(`{"scope":"internal"}`, roleEngineer, "eng"), Config{Store: store})
+	if recorder.Code != http.StatusForbidden {
+		t.Fatalf("status=%d body=%s", recorder.Code, recorder.Body.String())
+	}
+	if store.createN != 0 {
+		t.Fatal("non-admin must not create a baseline job")
+	}
+}
+
+func TestLibraryBaselineRefusesWhenEffectiveVersionExists(t *testing.T) {
+	store := &fakeLibraryStore{versions: []governance.LibraryVersion{{
+		ID: "libver-1", Scope: "internal", Kind: governance.LibraryVersionProductionEffective,
+		SnapshotID: "snap-effective", CreatedAt: time.Now().UTC(),
+	}}}
+	recorder := httptest.NewRecorder()
+	libraryBaselineEnqueue(recorder, baselineRequest(`{"scope":"internal"}`, roleAdmin, "admin"), Config{Store: store})
+	if recorder.Code != http.StatusConflict {
+		t.Fatalf("status=%d body=%s", recorder.Code, recorder.Body.String())
+	}
+	if body := decodeBody(t, recorder); body["code"] != "library_baseline_exists" || body["snapshot_id"] != "snap-effective" {
+		t.Fatalf("body=%v", body)
+	}
+	if store.createN != 0 {
+		t.Fatal("existing effective version must not create another baseline job")
+	}
+}
+
+// 目标读不到（这里用"没配置目标库"复现）：必须 503 并说明原因，
+// 既不能建作业，也不能顺手写一条版本记录来"解决"未知状态。
+func TestLibraryBaselineRefusesWhenTargetUnreadable(t *testing.T) {
+	store := &fakeLibraryStore{}
+	recorder := httptest.NewRecorder()
+	libraryBaselineEnqueue(recorder, baselineRequest(`{"scope":"external"}`, roleAdmin, "admin"), Config{Store: store})
+	if recorder.Code != http.StatusServiceUnavailable {
+		t.Fatalf("status=%d body=%s", recorder.Code, recorder.Body.String())
+	}
+	body := decodeBody(t, recorder)
+	if body["code"] != "library_baseline_unprobeable" || !strings.Contains(func() string {
+		text, _ := body["error"].(string)
+		return text
+	}(), "无法读取目标整库状态") {
+		t.Fatalf("body=%v", body)
+	}
+	if store.createN != 0 {
+		t.Fatal("unreadable target must not create a baseline job")
+	}
+	if len(store.versions) != 0 {
+		t.Fatal("unreadable target must not record any version")
+	}
+}
+
+// 测试候选只认登记过 test_sealed 的那份快照：归档里同时存在更新的目标基线/
+// 预备份快照时，绝不能把它们当成"拟发布的测试版本"。
+func TestTestSealedCandidateComesFromRegistryNotNewestArchiveEntry(t *testing.T) {
+	sealed := librarySnapshotView{SnapshotID: "snap-sealed", CreatedAt: time.Date(2026, 10, 29, 8, 54, 0, 0, time.UTC)}
+	prebackup := librarySnapshotView{SnapshotID: "snap-prebackup", CreatedAt: time.Date(2026, 10, 29, 9, 30, 0, 0, time.UTC)}
+	byID := map[string]librarySnapshotView{sealed.SnapshotID: sealed, prebackup.SnapshotID: prebackup}
+	versions := []governance.LibraryVersion{
+		{Kind: governance.LibraryVersionProductionPrebackup, SnapshotID: "snap-prebackup"},
+		{Kind: governance.LibraryVersionTestSealed, SnapshotID: "snap-sealed"},
+	}
+	candidate, reason := testSealedOf(versions, byID)
+	if reason != "" {
+		t.Fatalf("reason=%q", reason)
+	}
+	if candidate == nil || candidate.SnapshotID != "snap-sealed" {
+		t.Fatalf("candidate=%v, want the registered test seal", candidate)
+	}
+
+	// 没有任何 test_sealed 登记：宁可说"还没有测试封存"，也不拿别的快照顶替。
+	none, reason := testSealedOf([]governance.LibraryVersion{
+		{Kind: governance.LibraryVersionProductionPrebackup, SnapshotID: "snap-prebackup"},
+	}, byID)
+	if none != nil || !strings.Contains(reason, "还没有该目标的测试封存") {
+		t.Fatalf("candidate=%v reason=%q", none, reason)
+	}
+
+	// 登记过但它已经不在本机归档：说清是归档问题，不给候选。
+	missing, reason := testSealedOf([]governance.LibraryVersion{
+		{Kind: governance.LibraryVersionTestSealed, SnapshotID: "snap-gone"},
+	}, byID)
+	if missing != nil || !strings.Contains(reason, "不在本机归档里") {
+		t.Fatalf("candidate=%v reason=%q", missing, reason)
+	}
+}
+
+// 非空但无权威版本时，缺项必须指向真实入口，而不是一句"未知"。
+func TestLibrarySyncGateNamesTheBaselineEntryForNonEmptyTarget(t *testing.T) {
+	gate := librarySyncGateWithGrant(Config{ProductionReleaseRequestsEnabled: true,
+		ProductionBackupRestoreVerified: true, LibraryProductionDatabaseURL: "postgres://prod.invalid/db",
+		LibraryProductionInternalKB: "kb-int", LibraryCapacityBudgetBytes: 1 << 30},
+		libraryKnownView{State: "unknown"}, libraryKnownView{State: "unknown"}, "snap-1", true)
+	if gate.SyncAllowed {
+		t.Fatal("unknown production version must block the sync")
+	}
+	joined := strings.Join(gate.Reasons, "|")
+	if !strings.Contains(joined, "目标非空且没有生效版本记录") || !strings.Contains(joined, "目标权威基线") {
+		t.Fatalf("reasons=%v", gate.Reasons)
+	}
+}
+
+// 维护能力是配置事实：配置齐全时必须说"已接线"，缺项要列出缺哪个变量。
+func TestLibraryMaintenanceCapabilityReportsWiringInsteadOfOneVagueSentence(t *testing.T) {
+	wired := libraryMaintenanceCapability(Config{
+		LibraryTargetInstance: "kgseal-app", LibraryTargetProject: "kgseal-weknora",
+		LibraryTargetWriters: []string{"app"}, LibraryTargetIngressURL: "http://kgseal-ingress:18084/health",
+		LibraryTargetIngressService: "ingress", LibraryTargetJournalRoot: "/var/lib/knowledge-governance/journal",
+		LibraryTargetDockerSocket: "/var/run/docker.sock",
+	})
+	if wired["configured"] != true {
+		t.Fatalf("capability=%v", wired)
+	}
+	if wired["instance"] != "kgseal-app" {
+		t.Fatalf("instance=%v", wired["instance"])
+	}
+	broken := libraryMaintenanceCapability(Config{LibraryTargetInstance: "kgseal-app"})
+	if broken["configured"] != false {
+		t.Fatalf("capability=%v", broken)
+	}
+	missing, _ := broken["missing"].([]string)
+	if len(missing) == 0 || !strings.Contains(strings.Join(missing, ","), "LIBRARY_TARGET_WRITERS") {
+		t.Fatalf("missing=%v", broken["missing"])
+	}
+}
diff --git a/internal/httpapi/library_flow.go b/internal/httpapi/library_flow.go
index 19f355f..191b427 100644
--- a/internal/httpapi/library_flow.go
+++ b/internal/httpapi/library_flow.go
@@ -19,6 +19,7 @@ import (
 	"knowledge-governance/internal/librarydiff"
 	"knowledge-governance/internal/librarysnapshot"
 	postgresstore "knowledge-governance/internal/platform/postgres"
+	v071 "knowledge-governance/internal/releaseadapter/v071"
 )
 
 // 整库版本/状态/差异读取契约 + 生产同步的 fail-closed 入口。
@@ -56,30 +57,36 @@ type libraryKnownView struct {
 	EmptyBaseline bool `json:"empty_baseline,omitempty"`
 }
 
-// productionScopeEmpty 只读探测生产目标：真正连库数一遍，不用缓存或推断。
-func productionScopeEmpty(ctx context.Context, config Config, scope string) (bool, error) {
+// productionScopeState 只读探测生产目标：真正连库数一遍，不用缓存或推断。
+//
+// "空"必须是整库意义的空：只数 knowledges 会把"文档已删、分块/Wiki/资源还在"
+// 的目标当成首次发布的空基线，从而绕过基线初始化。所以这里用适配层同一份
+// 表清单与范围过滤（v071.ScopeContentEmpty），并把逐表行数交回调用方作为证据。
+func productionScopeState(ctx context.Context, config Config, scope string) (bool, map[string]int64, error) {
 	if strings.TrimSpace(config.LibraryProductionDatabaseURL) == "" {
-		return false, errors.New("生产整库目标未配置")
+		return false, nil, errors.New("生产整库目标未配置")
 	}
 	kb := config.LibraryProductionInternalKB
 	if scope == "external" {
 		kb = config.LibraryProductionExternalKB
 	}
 	if kb == "" {
-		return false, errors.New("生产知识库未配置")
+		return false, nil, errors.New("该范围的目标知识库未配置")
 	}
 	pool, err := pgxpool.New(ctx, config.LibraryProductionDatabaseURL)
 	if err != nil {
-		return false, err
+		return false, nil, err
 	}
 	defer pool.Close()
-	var count int64
-	err = pool.QueryRow(ctx, `SELECT count(*) FROM knowledges WHERE tenant_id=$1 AND knowledge_base_id=$2 AND deleted_at IS NULL`,
-		config.LibraryProductionTenantID, kb).Scan(&count)
-	if err != nil {
-		return false, err
-	}
-	return count == 0, nil
+	return v071.ScopeContentEmpty(ctx, pool,
+		v071.ProductionScope{TenantID: config.LibraryProductionTenantID, KnowledgeBaseID: kb})
+}
+
+// productionScopeEmpty 保留"只问空不空"的调用形状；逐表行数在需要举证时用
+// productionScopeState 取。
+func productionScopeEmpty(ctx context.Context, config Config, scope string) (bool, error) {
+	empty, _, err := productionScopeState(ctx, config, scope)
+	return empty, err
 }
 
 type libraryDiffView struct {
@@ -508,6 +515,70 @@ func errString(err error) string {
 	return err.Error()
 }
 
+// shortSnapshot 只用于给人看的提示：完整摘要留给快照详情，别在原因句里塞 64 位。
+func shortSnapshot(id string) string {
+	if len(id) <= 12 {
+		return id
+	}
+	return id[:12]
+}
+
+// testSealedOf 选"拟发布的测试封存"：只有登记过 test_sealed 的那一份才算候选。
+//
+// 归档是共享的：生产预备份与目标基线快照同样带着 scope 写进同一个归档根，
+// 按"这个 scope 最新一份"挑会把目标自己的内容当成测试候选（页面会显示一份
+// 永远不该被发布的东西）。所以候选来自版本登记，再用归档确认它真的还在本地。
+func testSealedOf(versions []governance.LibraryVersion, byID map[string]librarySnapshotView) (*librarySnapshotView, string) {
+	for _, item := range versions {
+		if item.Kind != governance.LibraryVersionTestSealed {
+			continue
+		}
+		snapshot, ok := byID[item.SnapshotID]
+		if !ok {
+			return nil, "最近一次测试封存 " + shortSnapshot(item.SnapshotID) + " 不在本机归档里（归档被清理或换了归档根）"
+		}
+		return &snapshot, ""
+	}
+	return nil, "还没有该目标的测试封存"
+}
+
+// libraryMaintenanceCapability 用配置事实回答"这台机器上维护是否接线"。
+// 它刻意只说配置：能停写入者/关入口/证明排空的真实能力在 worker 侧（docker socket、
+// 闸门、排空文件），API 若声称"能力可用"就是拿配置字符串冒充执行证据。
+func libraryMaintenanceCapability(config Config) map[string]any {
+	missing := make([]string, 0, 6)
+	if config.LibraryTargetInstance == "" {
+		missing = append(missing, "LIBRARY_TARGET_INSTANCE")
+	}
+	if config.LibraryTargetProject == "" {
+		missing = append(missing, "LIBRARY_TARGET_PROJECT")
+	}
+	if len(config.LibraryTargetWriters) == 0 {
+		missing = append(missing, "LIBRARY_TARGET_WRITERS")
+	}
+	if config.LibraryTargetIngressURL == "" {
+		missing = append(missing, "LIBRARY_TARGET_INGRESS_URL")
+	}
+	if config.LibraryTargetIngressService == "" {
+		missing = append(missing, "LIBRARY_TARGET_INGRESS_SERVICE")
+	}
+	if config.LibraryTargetJournalRoot == "" {
+		missing = append(missing, "LIBRARY_TARGET_JOURNAL_ROOT")
+	}
+	if config.LibraryTargetDockerSocket == "" {
+		missing = append(missing, "LIBRARY_TARGET_DOCKER_SOCKET")
+	}
+	return map[string]any{
+		"configured":      len(missing) == 0,
+		"missing":         missing,
+		"instance":        config.LibraryTargetInstance,
+		"project":         config.LibraryTargetProject,
+		"writers":         config.LibraryTargetWriters,
+		"ingress_service": config.LibraryTargetIngressService,
+		"note":            "配置齐全只说明治理侧接线完整；停写入者、关入口与排空由 worker 在作业内校验并执行",
+	}
+}
+
 func librarySyncGate(config Config, production libraryKnownView, prebackup libraryKnownView, target string) libraryGateView {
 	return librarySyncGateWithGrant(config, production, prebackup, target, false)
 }
@@ -531,9 +602,11 @@ func librarySyncGateWithGrant(config Config, production libraryKnownView, prebac
 		gate.Reasons = append(gate.Reasons, "生产整库目标未配置（LIBRARY_PRODUCTION_DATABASE_URL），无法核验生产当前状态")
 	}
 	// 首次发布：生产还没有"生效版本"记录，但只要生产目标可读且是空的，
-	// 这就是一个合法的"空基线"，不应该被永久挡住。非空但无权威版本仍然阻断。
+	// 这就是一个合法的"空基线"，不应该被永久挡住。非空但无权威版本仍然阻断，
+	// 指向真实可行的入口（在维护隔离下捕获目标整库并校验后登记基线），
+	// 而不是让人去手写版本或清空目标。
 	if production.State != "known" && !production.EmptyBaseline {
-		gate.Reasons = append(gate.Reasons, "生产当前权威版本未知，不能启动写入")
+		gate.Reasons = append(gate.Reasons, "目标非空且没有生效版本记录：先建立目标权威基线（维护隔离下捕获整库并逐类校验），或确认目标确实是空库")
 	}
 	if target == "" {
 		gate.Reasons = append(gate.Reasons, "还没有可同步的测试封存版本")
@@ -569,21 +642,20 @@ func libraryOverviewHandler(w http.ResponseWriter, r *http.Request, config Confi
 	// 可发起封存 = worker 真实探测到执行器可用且指向本实例；原因逐条给全。
 	overview.CaptureAvailable, overview.CaptureReason, overview.Executor = libraryExecutorAvailability(r.Context(), config)
 
-	// 测试封存来自归档：它只是测试侧事实。
+	// 测试封存来自归档 + 版本登记：归档里**不止**测试封存——生产预备份与目标基线
+	// 快照同样带 scope，如果只按"这个 scope 最新一份"挑，页面就会把目标自己的内容
+	// 当成拟发布的测试候选。所以候选只认登记过 kind=test_sealed 的那一份。
 	snapshots, snapErr := readLibrarySnapshots(r.Context(), config.LibraryArchiveRoot)
+	byID := map[string]librarySnapshotView{}
+	archiveReadable := false
 	if snapErr != nil {
 		_, overview.TestSealedReason = libraryArchiveErrorStatus(snapErr, "归档不可读")
 	} else if !snapshots.Available {
 		overview.TestSealedReason = snapshots.Reason
 	} else {
-		for index := range snapshots.Snapshots {
-			if snapshots.Snapshots[index].Scope == scope {
-				overview.TestSealed = &snapshots.Snapshots[index]
-				break
-			}
-		}
-		if overview.TestSealed == nil {
-			overview.TestSealedReason = "还没有该目标的测试封存"
+		archiveReadable = true
+		for _, snapshot := range snapshots.Snapshots {
+			byID[snapshot.SnapshotID] = snapshot
 		}
 	}
 
@@ -593,6 +665,9 @@ func libraryOverviewHandler(w http.ResponseWriter, r *http.Request, config Confi
 		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "cannot read library versions"})
 		return
 	}
+	if archiveReadable {
+		overview.TestSealed, overview.TestSealedReason = testSealedOf(versions, byID)
+	}
 	overview.Production = libraryKnownView{State: "unknown", Reason: "还没有生产验证通过的生效版本记录"}
 	overview.Prebackup = libraryKnownView{State: "unknown", Reason: "本次目标快照还没有生产预备份"}
 	target := ""
diff --git a/internal/httpapi/server.go b/internal/httpapi/server.go
index 1b1c4cf..bb53029 100644
--- a/internal/httpapi/server.go
+++ b/internal/httpapi/server.go
@@ -148,6 +148,15 @@ type Config struct {
 	// LibraryTargetInstance 是实例级维护的目标实例名；留空即"未接线"，
 	// 页面不能发起按预备份恢复，接口返回原因而不是假装能恢复。
 	LibraryTargetInstance string
+	// 维护能力的其余配置项只用于如实展示"是否接线"：未运行维护与没有维护能力
+	// 是两件事，页面不能混成一句"未接入"。真正停写入者/关入口的能力由 worker
+	// 在执行作业时校验（socket、入口、排空文件都在 worker 侧）。
+	LibraryTargetProject        string
+	LibraryTargetWriters        []string
+	LibraryTargetIngressURL     string
+	LibraryTargetIngressService string
+	LibraryTargetDockerSocket   string
+	LibraryTargetJournalRoot    string
 	// LibrarySourceInstance 是死信解除记录的来源实例名（封存源），留空回落到目标实例名。
 	LibrarySourceInstance string
 	// LibraryAgentSocket 是主机侧封存 agent 的 unix socket；留空即页面不能发起封存。
@@ -479,6 +488,8 @@ func NewHandler(config Config) (http.Handler, error) {
 			return
 		}
 		response := map[string]any{"held": held != nil && held.ReleasedAt == nil, "maintenance": held}
+		// 有没有维护能力是配置事实，和"此刻没有窗口"必须分开回答。
+		response["capability"] = libraryMaintenanceCapability(config)
 		// 实例级占用才是真正的互斥来源：跨 scope 也在这里体现。
 		if instanceStore, ok := config.Store.(interface {
 			InstanceMaintenanceOf(ctx context.Context, instance string) (*postgresstore.LibraryInstanceMaintenance, error)
@@ -527,6 +538,10 @@ func NewHandler(config Config) (http.Handler, error) {
 	mux.HandleFunc("POST /api/v1/library/syncs", func(w http.ResponseWriter, r *http.Request) {
 		librarySyncEnqueue(w, r, config)
 	})
+	// 首次发布的目标权威基线：管理员在维护隔离下捕获目标整库并校验后登记版本。
+	mux.HandleFunc("POST /api/v1/library/baselines", func(w http.ResponseWriter, r *http.Request) {
+		libraryBaselineEnqueue(w, r, config)
+	})
 	// 全部 main 提交时间线（读本库缓存，不直接打 Gitea）
 	mux.HandleFunc("GET /api/v1/version-history", func(w http.ResponseWriter, r *http.Request) {
 		versionHistoryList(w, r, config)
diff --git a/internal/platform/postgres/library_jobs.go b/internal/platform/postgres/library_jobs.go
index 83c7b92..66ad5fb 100644
--- a/internal/platform/postgres/library_jobs.go
+++ b/internal/platform/postgres/library_jobs.go
@@ -261,7 +261,7 @@ func (s *Store) InterruptedLibraryJobs(ctx context.Context) ([]governance.Librar
 	rows, err := s.db.Query(ctx, `
 SELECT lj.id FROM library_jobs lj
 LEFT JOIN jobs j ON j.id=lj.queue_job_id
-WHERE lj.kind IN ('sync','restore')
+WHERE lj.kind IN ('sync','restore','baseline')
   AND (
     -- 业务作业在跑、队列已经没了/停了/租约过期
     (lj.state='running' AND (j.id IS NULL OR j.state IN ('failed','completed','cancelled','dead')
diff --git a/internal/platform/postgres/migrations/000075_library_baseline_kind.down.sql b/internal/platform/postgres/migrations/000075_library_baseline_kind.down.sql
new file mode 100644
index 0000000..a863f58
--- /dev/null
+++ b/internal/platform/postgres/migrations/000075_library_baseline_kind.down.sql
@@ -0,0 +1,8 @@
+DELETE FROM library_jobs WHERE kind='baseline';
+ALTER TABLE library_jobs DROP CONSTRAINT IF EXISTS library_jobs_kind_check;
+ALTER TABLE library_jobs ADD CONSTRAINT library_jobs_kind_check
+    CHECK (kind IN ('seal','sync','restore'));
+DROP INDEX IF EXISTS library_jobs_write_target;
+CREATE UNIQUE INDEX library_jobs_write_target
+    ON library_jobs(scope)
+    WHERE state IN ('pending','running') AND kind IN ('sync','restore');
\ No newline at end of file
diff --git a/internal/platform/postgres/migrations/000075_library_baseline_kind.up.sql b/internal/platform/postgres/migrations/000075_library_baseline_kind.up.sql
new file mode 100644
index 0000000..741515e
--- /dev/null
+++ b/internal/platform/postgres/migrations/000075_library_baseline_kind.up.sql
@@ -0,0 +1,12 @@
+-- 允许"建立目标权威基线"作为一种独立业务作业：首次发布的目标非空又没有生效版本时，
+-- 只能通过真实捕获 + 校验登记基线，不能手写版本记录。
+-- 基线会在目标上开维护窗口（停写入者），所以它与 sync/restore 共用同一把写互斥：
+-- 同一 scope 不允许同时存在两种写作业。
+ALTER TABLE library_jobs DROP CONSTRAINT IF EXISTS library_jobs_kind_check;
+ALTER TABLE library_jobs ADD CONSTRAINT library_jobs_kind_check
+    CHECK (kind IN ('seal','sync','restore','baseline'));
+
+DROP INDEX IF EXISTS library_jobs_write_target;
+CREATE UNIQUE INDEX library_jobs_write_target
+    ON library_jobs(scope)
+    WHERE state IN ('pending','running') AND kind IN ('sync','restore','baseline');
\ No newline at end of file
diff --git a/internal/platform/postgres/migrations_test.go b/internal/platform/postgres/migrations_test.go
index e15f24e..e638bba 100644
--- a/internal/platform/postgres/migrations_test.go
+++ b/internal/platform/postgres/migrations_test.go
@@ -11,45 +11,51 @@ func TestEmbeddedMigrationsAreVersionSorted(t *testing.T) {
 	if err != nil {
 		t.Fatalf("loadMigrations() error = %v", err)
 	}
-	if len(migrations) != 74 {
-		t.Fatalf("migration count = %d, want 74", len(migrations))
+	if len(migrations) != 75 {
+		t.Fatalf("migration count = %d, want 75", len(migrations))
+	}
+	// 75 允许"建立目标权威基线"作为独立业务作业，并与 sync/restore 共用写互斥。
+	if baseline := migrations[len(migrations)-1]; baseline.Version != 75 ||
+		!strings.Contains(baseline.UpSQL, "library_jobs_write_target") ||
+		!strings.Contains(baseline.UpSQL, "'baseline'") {
+		t.Fatalf("migration 75 = %#v", baseline)
 	}
 	// 74 记录封存执行器的运行时状态：页面可用性来自真实观测，不来自配置字符串。
-	if executor := migrations[len(migrations)-1]; executor.Version != 74 ||
+	if executor := migrations[len(migrations)-2]; executor.Version != 74 ||
 		!strings.Contains(executor.UpSQL, "library_executor_status") {
 		t.Fatalf("migration 74 = %#v", executor)
 	}
 	// 73 记录死信精确解除：保留上游行，只绑定指纹、重放引用与观测摘要。
-	if release := migrations[len(migrations)-2]; release.Version != 73 ||
+	if release := migrations[len(migrations)-3]; release.Version != 73 ||
 		!strings.Contains(release.UpSQL, "library_dead_letter_releases") {
 		t.Fatalf("migration 73 = %#v", release)
 	}
 	// 72 让维护占用按实例互斥（internal/external 不再各有各的锁）。
-	if instance := migrations[len(migrations)-3]; instance.Version != 72 ||
+	if instance := migrations[len(migrations)-4]; instance.Version != 72 ||
 		!strings.Contains(instance.UpSQL, "library_instance_maintenance") {
 		t.Fatalf("migration 72 = %#v", instance)
 	}
 	// 71 让维护记录能区分实例级维护与仅治理库互斥。
-	if level := migrations[len(migrations)-4]; level.Version != 71 ||
+	if level := migrations[len(migrations)-5]; level.Version != 71 ||
 		!strings.Contains(level.UpSQL, "level") || !strings.Contains(level.UpSQL, "ingress_state") {
 		t.Fatalf("migration 71 = %#v", level)
 	}
-	if maint := migrations[len(migrations)-5]; maint.Version != 70 || !strings.Contains(maint.UpSQL, "library_maintenance") {
+	if maint := migrations[len(migrations)-6]; maint.Version != 70 || !strings.Contains(maint.UpSQL, "library_maintenance") {
 		t.Fatalf("migration 70 = %#v", maint)
 	}
-	if tail := migrations[len(migrations)-6]; tail.Version != 69 ||
+	if tail := migrations[len(migrations)-7]; tail.Version != 69 ||
 		!strings.Contains(tail.UpSQL, "library_jobs_write_target") {
 		t.Fatalf("migration 69 = %#v", tail)
 	}
-	if restore := migrations[len(migrations)-7]; restore.Version != 68 || !strings.Contains(restore.UpSQL, "restore") {
+	if restore := migrations[len(migrations)-8]; restore.Version != 68 || !strings.Contains(restore.UpSQL, "restore") {
 		t.Fatalf("migration 68 = %#v", restore)
 	}
-	if last := migrations[len(migrations)-8]; last.Version != 67 ||
+	if last := migrations[len(migrations)-9]; last.Version != 67 ||
 		!strings.Contains(last.UpSQL, "library_release_authorizations") ||
 		!strings.Contains(last.UpSQL, "params_digest") {
 		t.Fatalf("migration 67 = %#v", last)
 	}
-	if flow := migrations[len(migrations)-9]; flow.Version != 66 ||
+	if flow := migrations[len(migrations)-10]; flow.Version != 66 ||
 		!strings.Contains(flow.UpSQL, "CREATE TABLE library_versions") ||
 		!strings.Contains(flow.UpSQL, "library_jobs_active") {
 		t.Fatalf("migration 66 = %#v", flow)
diff --git a/internal/releaseadapter/v071/library_scope_probe.go b/internal/releaseadapter/v071/library_scope_probe.go
new file mode 100644
index 0000000..d25ec8e
--- /dev/null
+++ b/internal/releaseadapter/v071/library_scope_probe.go
@@ -0,0 +1,46 @@
+package v071
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+// ScopeContentCounts 数一个知识库在各内容表里的行数（数据库侧事实）。
+//
+// 为什么不能只数 knowledges：文档被删掉、分块与 Wiki/资源还在的库并不为空。
+// 只数一张表会把这种目标判成"首次发布的空库"，从而让一条本该走基线初始化的
+// 路径绕过去；这里用与整库读写完全相同的表清单与过滤条件，保证"空"的定义只有一份。
+func ScopeContentCounts(ctx context.Context, pool *pgxpool.Pool, identity ProductionScope) (map[string]int64, error) {
+	if pool == nil || identity.TenantID == 0 || !validSearchIdentifier(identity.KnowledgeBaseID) {
+		return nil, errors.New("invalid scope identity")
+	}
+	counts := make(map[string]int64, len(productionLibraryTables))
+	for _, table := range productionLibraryTables {
+		var count int64
+		if err := pool.QueryRow(ctx, fmt.Sprintf(`SELECT count(*) FROM %s WHERE %s`, table, scopeWhere(table)),
+			identity.TenantID, identity.KnowledgeBaseID).Scan(&count); err != nil {
+			return nil, fmt.Errorf("count %s: %w", table, err)
+		}
+		counts[table] = count
+	}
+	return counts, nil
+}
+
+// ScopeContentEmpty 只有每张内容表都是 0 才算空目标，并交回逐表行数作为证据。
+// 注意它**不**包含检索索引：索引由分块派生，分块为空而索引非空属于不一致，
+// 应在执行侧（预备份/基线捕获）报出来，不能在这里被当成"空"。
+func ScopeContentEmpty(ctx context.Context, pool *pgxpool.Pool, identity ProductionScope) (bool, map[string]int64, error) {
+	counts, err := ScopeContentCounts(ctx, pool, identity)
+	if err != nil {
+		return false, nil, err
+	}
+	for _, count := range counts {
+		if count != 0 {
+			return false, counts, nil
+		}
+	}
+	return true, counts, nil
+}