diff --git a/internal/app/compiled.go b/internal/app/compiled.go
index 4eed7ce..433e182 100644
--- a/internal/app/compiled.go
+++ b/internal/app/compiled.go
@@ -27,6 +27,29 @@ type pluginRegistry struct {
 	compiledRegistry
 	pluginID string
 	caps     hostcaps
+	// summary 是本插件的注册面摘要（WP3-I4）：AddAdminZone 声明记录于此，
+	// server 经 CompiledPlugins 供给分区清单端点（WP3-I3）。
+	summary *server.CompiledPlugin
+}
+
+// AddAdminZone 记录管理区分区声明（WP3-I3）：声明即展示元数据，权威记录
+// 就是注册期摘要；规格非法（非对象、id/title 缺失）fail-closed 拒绝，
+// 使 register() 整体中止（与命令注册同一失败语义）。
+func (r pluginRegistry) AddAdminZone(spec json.RawMessage) error {
+	if r.summary == nil {
+		return errors.New("extension: " + r.pluginID + ": admin zone outside applyCompiled")
+	}
+	var s extension.AdminZoneSpec
+	if err := json.Unmarshal(spec, &s); err != nil {
+		return fmt.Errorf("extension: admin zone spec: %w", err)
+	}
+	if s.ID == "" || s.Title == "" {
+		return fmt.Errorf("extension: %s: admin zone requires id and title", r.pluginID)
+	}
+	r.summary.AdminZones = append(r.summary.AdminZones, server.AdminZoneSection{
+		ID: s.ID, Title: s.Title, Icon: s.Icon, Desc: s.Desc, Order: s.Order,
+	})
+	return nil
 }
 
 func (r pluginRegistry) AddCommandHandler(spec json.RawMessage, h extension.Handler) error {
@@ -170,10 +193,10 @@ func applyCompiled(skillsRoot string, bus *cmdbus.Bus, caps hostcaps) []server.C
 		if e.Register == nil {
 			continue
 		}
-		reg := pluginRegistry{compiledRegistry: base, pluginID: e.ID, caps: caps}
+		sum := server.CompiledPlugin{ID: e.ID}
+		reg := pluginRegistry{compiledRegistry: base, pluginID: e.ID, caps: caps, summary: &sum}
 		// Register 失败的插件保留已成功注册部分（与命令总线一致：部分注册
 		// 生效），摘要如实反映实际注册面。
-		sum := server.CompiledPlugin{ID: e.ID}
 		if err := e.Register(recordRegistry{Registry: reg, sum: &sum}); err != nil {
 			log.Printf("extension: %s: %v", e.ID, err)
 		}
diff --git a/internal/app/compiled_list_test.go b/internal/app/compiled_list_test.go
index 346cd5e..17125e4 100644
--- a/internal/app/compiled_list_test.go
+++ b/internal/app/compiled_list_test.go
@@ -33,6 +33,13 @@ func TestApplyCompiledRecordsSummary(t *testing.T) {
 			return err
 		}
 		_ = reg.AddSkill("demo-skill", "# 演示\n技能正文")
+		// WP3-I3：管理区分区声明记入摘要；缺 id/title 的非法规格 fail-closed。
+		if err := reg.AddAdminZone(json.RawMessage(`{"id":"demo.audit","title":"演示审计","icon":"search","order":20}`)); err != nil {
+			return err
+		}
+		if err := reg.AddAdminZone(json.RawMessage(`{"title":"缺 id"}`)); err == nil {
+			t.Fatal("admin zone without id should fail")
+		}
 		return nil
 	}})
 	extension.RegisterCompiled(extension.InProc{ID: "broken", Register: func(reg extension.Registry) error {
@@ -66,6 +73,13 @@ func TestApplyCompiledRecordsSummary(t *testing.T) {
 	if len(sums[0].Skills) != 1 || sums[0].Skills[0] != "demo-skill" {
 		t.Fatalf("demo skills = %v", sums[0].Skills)
 	}
+	// WP3-I3：合法声明记入，非法规格（缺 id）被拒后摘要不受污染。
+	if len(sums[0].AdminZones) != 1 {
+		t.Fatalf("demo admin zones = %+v", sums[0].AdminZones)
+	}
+	if z := sums[0].AdminZones[0]; z.ID != "demo.audit" || z.Title != "演示审计" || z.Icon != "search" || z.Order != 20 {
+		t.Fatalf("demo admin zone = %+v", z)
+	}
 	// broken：Register 报错但先成功的命令仍在总线，摘要如实保留。
 	if sums[1].ID != "broken" || len(sums[1].Commands) != 1 || sums[1].Commands[0] != "broken.cmd" {
 		t.Fatalf("broken summary = %+v", sums[1])
diff --git a/internal/genui/genui_test.go b/internal/genui/genui_test.go
index 03d0eb3..d1e1908 100644
--- a/internal/genui/genui_test.go
+++ b/internal/genui/genui_test.go
@@ -223,6 +223,7 @@ func (r *fakeRegistry) RegisterResourceAuthorizer(fn extension.ResourceAuthorize
 	return nil
 }
 func (r *fakeRegistry) AddIntent(spec json.RawMessage) error { return nil }
+func (r *fakeRegistry) AddAdminZone(spec json.RawMessage) error { return nil }
 
 func TestPresentRejectsUnknownActionIDs(t *testing.T) {
 	newRealSvc(t)
diff --git a/internal/server/adminzone_test.go b/internal/server/adminzone_test.go
new file mode 100644
index 0000000..1779ccc
--- /dev/null
+++ b/internal/server/adminzone_test.go
@@ -0,0 +1,91 @@
+package server
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"path/filepath"
+	"testing"
+
+	"agent-system-backend/internal/bus"
+	"agent-system-backend/internal/plugins"
+	"agent-system-backend/internal/profiles"
+	"agent-system-backend/internal/runmgr"
+	"agent-system-backend/internal/runtime"
+	"agent-system-backend/internal/settings"
+	"agent-system-backend/internal/store"
+	"agent-system-backend/internal/tools"
+)
+
+// WP3-I3：GET /api/admin-zone/sections 展平编译插件的分区声明并按
+// Order→ID 稳定排序；无声明时空数组（非 null）。
+func TestListAdminZoneSections(t *testing.T) {
+	dir := t.TempDir()
+	st, err := store.OpenSQLite(filepath.Join(dir, "test.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { st.Close() })
+	b := bus.New()
+	reg := tools.NewRegistry()
+	reg.RegisterBuiltin()
+	setSvc := settings.NewService(st)
+	profSvc := profiles.New(st)
+	profSvc.EnsureDefault()
+	mgr := runmgr.New(st, b, reg, profSvc, setSvc, &runtime.LLMRunner{}, &runtime.SubLLMRunner{}, &runtime.MockRunner{}, &runtime.MockSubagent{})
+	ph := plugins.New(st, reg, setSvc, filepath.Join(dir, "plugins"))
+	srv := New(st, mgr, reg, profSvc, setSvc, ph)
+	srv.Auth = NewAuthenticator(st, true)
+	srv.CompiledPlugins = []CompiledPlugin{
+		{ID: "rdm", AdminZones: []AdminZoneSection{
+			{ID: "rdm.audit", Title: "项目追溯与审计", Icon: "search", Order: 20},
+		}},
+		{ID: "other", AdminZones: []AdminZoneSection{
+			{ID: "other.z", Title: "Z", Order: 10},
+			{ID: "other.a", Title: "A", Order: 10},
+		}},
+	}
+	h := srv.Handler()
+	key, err := st.CreateAPIKey("alice", "e2e")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	get := func(path string) *httptest.ResponseRecorder {
+		req := httptest.NewRequest(http.MethodGet, path, nil)
+		req.Header.Set("Authorization", "Bearer "+key)
+		rec := httptest.NewRecorder()
+		h.ServeHTTP(rec, req)
+		return rec
+	}
+	// 未认证拒绝。
+	if rec := httptest.NewRecorder(); func() *httptest.ResponseRecorder {
+		req := httptest.NewRequest(http.MethodGet, "/api/admin-zone/sections", nil)
+		h.ServeHTTP(rec, req)
+		return rec
+	}().Code != http.StatusUnauthorized {
+		t.Fatalf("unauthenticated request should 401")
+	}
+	rec := get("/api/admin-zone/sections")
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status %d: %s", rec.Code, rec.Body.String())
+	}
+	var got []AdminZoneSection
+	if err := json.Unmarshal(rec.Body.Bytes(), &got); err != nil {
+		t.Fatal(err)
+	}
+	wantIDs := []string{"other.a", "other.z", "rdm.audit"} // Order 同为 10 的按 ID，再 Order 20
+	if len(got) != 3 {
+		t.Fatalf("sections = %+v", got)
+	}
+	for i, w := range wantIDs {
+		if got[i].ID != w {
+			t.Fatalf("sections[%d] = %s, want %s (full: %+v)", i, got[i].ID, w, got)
+		}
+	}
+	// 无声明时空数组非 null。
+	srv.CompiledPlugins = nil
+	if rec := get("/api/admin-zone/sections"); rec.Body.String() == "null" {
+		t.Fatalf("empty listing must be [] not null: %s", rec.Body.String())
+	}
+}
diff --git a/internal/server/server.go b/internal/server/server.go
index b695a76..dd7acd2 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -14,6 +14,7 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -325,6 +326,9 @@ func (s *Server) Handler() http.Handler {
 	mux.HandleFunc("POST /api/plugins/reload", s.reloadPlugins)
 	mux.HandleFunc("GET /api/plugins/settings-schema", s.pluginSettingsSchema)
 	mux.HandleFunc("GET /api/registry", s.registry)
+	// WP3-I3/KTD4：管理区声明分区清单（编译插件经 Registry.AddAdminZone 声明；
+	// 展示元数据对所有认证主体开放，分区内数据能力由组件命令面 fail-closed）。
+	mux.HandleFunc("GET /api/admin-zone/sections", s.listAdminZoneSections)
 
 	// ---- 计划 / 待办 / 命令 / 解析器 / 检索 ----
 	mux.HandleFunc("GET /api/conversations/{id}/plan", s.getPlan)
@@ -1457,10 +1461,22 @@ func (s *Server) deleteUserTool(w http.ResponseWriter, r *http.Request) {
 // ID 即插件身份；Commands/Intents/Skills 为装载期成功注册的声明资产名。
 // 命令规格与处理器在命令总线，摘要只服务 /api/plugins 管理清单展示。
 type CompiledPlugin struct {
-	ID       string
-	Commands []string
-	Intents  []string
-	Skills   []string
+	ID         string
+	Commands   []string
+	Intents    []string
+	Skills     []string
+	AdminZones []AdminZoneSection
+}
+
+// AdminZoneSection 是编译插件声明的管理区展示分区（WP3-I3/KTD4）：
+// 字段与 extension.AdminZoneSpec 对齐（组合根装载期记录）；入口不做基座级
+// 权限判定，分区内数据能力由组件自身命令面 fail-closed。
+type AdminZoneSection struct {
+	ID    string `json:"id"`
+	Title string `json:"title"`
+	Icon  string `json:"icon,omitempty"`
+	Desc  string `json:"desc,omitempty"`
+	Order int    `json:"order,omitempty"`
 }
 
 type pluginView struct {
@@ -1512,6 +1528,23 @@ func (s *Server) pluginSettingsSchema(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, s.plugins.SettingsSchema())
 }
 
+// listAdminZoneSections 管理区声明分区清单（WP3-I3）：展平全部编译插件的
+// 声明并按 Order→ID 稳定排序。声明是展示元数据，对所有认证主体一致；
+// 分区内可见数据由分区组件自身的命令面按 owner fail-closed 判定。
+func (s *Server) listAdminZoneSections(w http.ResponseWriter, r *http.Request) {
+	var out []AdminZoneSection
+	for _, cp := range s.CompiledPlugins {
+		out = append(out, cp.AdminZones...)
+	}
+	sort.Slice(out, func(i, j int) bool {
+		if out[i].Order != out[j].Order {
+			return out[i].Order < out[j].Order
+		}
+		return out[i].ID < out[j].ID
+	})
+	writeJSON(w, http.StatusOK, orEmptySlice(out))
+}
+
 // registry 统一注册表视图（来源标记 + 按来源启停入口）。
 func (s *Server) registry(w http.ResponseWriter, r *http.Request) {
 	reg := map[string]any{
diff --git a/pkg/extension/extension.go b/pkg/extension/extension.go
index 37bad19..809a0d1 100644
--- a/pkg/extension/extension.go
+++ b/pkg/extension/extension.go
@@ -25,7 +25,10 @@ import (
 // 2.8.0-experimental：EXT-17 新增可选能力接口 SurfaceHost（SurfaceSave/Get/List/
 // Activation；Generative UI U2）。实现由基座 hostcaps 注入；未装配时类型断言
 // 不成立即明确拒绝，不给必实现 Host 接口加方法（不破坏既有消费者）。
-const SurfaceVersion = "2.8.0-experimental"
+// 2.9.0-experimental：Registry.AddAdminZone 与 AdminZoneSpec（WP3-I3/KTD4：编译
+// 插件向基座管理区声明展示分区；分区入口不做基座级权限判定，数据能力由
+// 分区组件自身的命令面 fail-closed）。
+const SurfaceVersion = "2.9.0-experimental"
 
 // ErrNotLinked 表示进程没有空白导入 link 包，Main 无法启动服务。
 var ErrNotLinked = errors.New("extension: runner not linked; blank-import agent-system-backend/pkg/extension/link")
@@ -49,6 +52,23 @@ type Registry interface {
 	// AddIntent 声明自然语言意图（G2-2）：短语命中后路由到已注册命令——
 	// 经同一命令总线分发（同审计信封与 HITL 收口）。规格见 IntentSpec。
 	AddIntent(spec json.RawMessage) error
+	// AddAdminZone 声明基座管理区展示分区（WP3-I3/KTD4）：编译插件把自己的
+	// 领域工作台以分区形式挂进管理区；声明只携带展示元数据，分区入口不做
+	// 基座级权限判定——数据能力由分区组件自身的命令面 fail-closed。
+	// 规格见 AdminZoneSpec。
+	AddAdminZone(spec json.RawMessage) error
+}
+
+// AdminZoneSpec 管理区分区声明（WP3-I3）：ID 是分区身份（建议形如
+// <plugin>.<section>，前端按 ID 映射内置分区组件）；Title/Icon/Desc 为展示
+// 元数据（icon 取基座前端 IconName 词表，未知值前端回退通用图标）；Order
+// 越小越靠前，同 Order 按 ID 字典序。
+type AdminZoneSpec struct {
+	ID    string `json:"id"`
+	Title string `json:"title"`
+	Icon  string `json:"icon,omitempty"`
+	Desc  string `json:"desc,omitempty"`
+	Order int    `json:"order,omitempty"`
 }
 
 // SurfaceSaveRequest 是一次页面提交（EXT-17）：Spec 为 core.SurfaceSpec 的
diff --git a/pkg/extension/surface.txt b/pkg/extension/surface.txt
index 93c6b6f..9fa2ef7 100644
--- a/pkg/extension/surface.txt
+++ b/pkg/extension/surface.txt
@@ -1,5 +1,6 @@
 AdminProvider
 AdminProvider.IsAdmin
+AdminZoneSpec
 Compiled
 ErrNotLinked
 Handler
@@ -28,6 +29,7 @@ NewScopedHost
 Options
 RegisterCompiled
 Registry
+Registry.AddAdminZone
 Registry.AddCommand
 Registry.AddCommandHandler
 Registry.AddIntent