diff --git a/cmd/sip-go-agent/current_dispatcher_setup.go b/cmd/sip-go-agent/current_dispatcher_setup.go
new file mode 100644
index 0000000..2126228
--- /dev/null
+++ b/cmd/sip-go-agent/current_dispatcher_setup.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"net/http"
+
+	"git.ipao.vip/rogee/go-sip/internal/config"
+	"git.ipao.vip/rogee/go-sip/internal/configread"
+)
+
+// dispatcherConfigurationClient binds the deployment-owned Dispatcher identity
+// to the sole read-only SaaS configuration client. It opens no external resource.
+func dispatcherConfigurationClient(mode string, httpClient *http.Client) (config.DispatcherEnvironment, *configread.Client, error) {
+	settings, err := config.LoadDispatcherEnvironment(mode)
+	if err != nil {
+		return config.DispatcherEnvironment{}, nil, err
+	}
+	reader, err := configread.NewClient(settings.SaaSBaseURL, settings.DispatcherID, settings.SecretKey, httpClient)
+	if err != nil {
+		return config.DispatcherEnvironment{}, nil, err
+	}
+	return settings, reader, nil
+}
diff --git a/cmd/sip-go-agent/current_dispatcher_setup_test.go b/cmd/sip-go-agent/current_dispatcher_setup_test.go
new file mode 100644
index 0000000..f23f95f
--- /dev/null
+++ b/cmd/sip-go-agent/current_dispatcher_setup_test.go
@@ -0,0 +1,69 @@
+package main
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync/atomic"
+	"testing"
+)
+
+func TestDispatcherConfigurationClientReadsApprovedSIPWithExplicitIdentity(t *testing.T) {
+	const dispatcherID = "c046b893-8628-4589-ae50-619d049248a6"
+	const secret = "synthetic-placeholder-not-a-credential"
+	fixture, err := os.ReadFile(filepath.Join("..", "..", "contracts", "local", "examples", "config-read-sip.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	var requests atomic.Int32
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		requests.Add(1)
+		if r.Method != http.MethodGet || r.URL.Path != "/internal/v1/dispatcher/sip" || r.Header.Get("X-DISPATCHER-id") != dispatcherID || r.Header.Get("X-DISPATCHER-SECRET-KEY") != secret {
+			t.Errorf("unexpected SaaS read method, path or Dispatcher headers: %s %s", r.Method, r.URL.Path)
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write(fixture)
+	}))
+	defer server.Close()
+	path := filepath.Join(t.TempDir(), "dispatcher.sqlite")
+	t.Setenv("DISPATCHER_ID", dispatcherID)
+	t.Setenv("DISPATCHER_SECRET_KEY", secret)
+	t.Setenv("SAAS_BASE_URL", server.URL)
+	t.Setenv("RABBITMQ_URL", "amqp://127.0.0.1:5672/%2Fmock")
+	t.Setenv("DISPATCHER_SQLITE_PATH", path)
+
+	settings, reader, err := dispatcherConfigurationClient("mock", server.Client())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if settings.DispatcherID != dispatcherID || settings.SQLitePath != path {
+		t.Fatal("dispatcher startup changed approved deployment identity or SQLite path")
+	}
+	sip, err := reader.ReadCurrentSIP(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if sip.DispatcherID != dispatcherID || sip.Revision != 8 || requests.Load() != 1 {
+		t.Fatalf("wrong approved SIP snapshot or HTTP request count: revision=%d requests=%d", sip.Revision, requests.Load())
+	}
+	if _, err := os.Stat(path); !os.IsNotExist(err) {
+		t.Fatalf("HTTP client assembly opened SQLite: %v", err)
+	}
+}
+
+func TestDispatcherConfigurationClientNeverUsesLegacyHTTPSetting(t *testing.T) {
+	t.Setenv("DISPATCHER_ID", "c046b893-8628-4589-ae50-619d049248a6")
+	t.Setenv("DISPATCHER_SECRET_KEY", "synthetic-placeholder-not-a-credential")
+	t.Setenv("SAAS_BASE_URL", "")
+	t.Setenv("DISPATCHER_CONFIG_READ_BASE_URL", "http://127.0.0.1:8080")
+	t.Setenv("RABBITMQ_URL", "amqp://127.0.0.1:5672/%2Fmock")
+	t.Setenv("DISPATCHER_SQLITE_PATH", filepath.Join(t.TempDir(), "dispatcher.sqlite"))
+	if _, _, err := dispatcherConfigurationClient("mock", nil); err == nil || !strings.Contains(err.Error(), "SAAS_BASE_URL") {
+		t.Fatalf("legacy HTTP source silently became a fallback: %v", err)
+	}
+}
diff --git a/docs/evidence/saas-dispatcher-implementation.md b/docs/evidence/saas-dispatcher-implementation.md
index 283ad15..281f81a 100644
--- a/docs/evidence/saas-dispatcher-implementation.md
+++ b/docs/evidence/saas-dispatcher-implementation.md
@@ -37,6 +37,7 @@
 ## P03：HTTP 读取分批改造（未整体签收）
 
 - `contract.ValidateCurrent` 与 `configread` 按当前 Schema 读取 SIP、provider、task、quota 和 cursor 任务发现；严格检查数字 tenant_id、本 D 归属及不可变配置。provider 凭据原值只保留在内存快照，不写日志；Agent 参数中的显式 0/false 保真；无旧 Schema/旧配置回退。
+- CLI 组装辅助 `dispatcherConfigurationClient` 将严格 Mock 环境预检与当前 HTTP Client 绑定；本机 HTTP 隔离测试实际读取 SIP，核对固定 `/internal/v1/dispatcher/sip`、D 身份/密钥 Header、revision 与不打开 SQLite；旧 `DISPATCHER_CONFIG_READ_BASE_URL` 不可充当缺失的当前地址。`go test ./cmd/sip-go-agent -run '^TestDispatcherConfigurationClient' -count=1` 通过；主 `dispatcher` 命令尚未调用该辅助，不能声称启动已切换。
 - `store.OpenCurrent` 新建数字租户 SQLite 状态；旧表、旧版当前布局、残缺布局均在写入前拒绝并保留原记录；不执行旧数据迁移或自动清理。启动时完整发现同一快照一次提交，分页增量逐页持久提交后才推进**内存** cursor；失败关闭准入，重启重新取完整快照。HTTP 的旧 running 不能解除 MQ 暂停/终止，同 revision 异内容及跨任务 SIP/租户额度冲突拒绝。
 - `CurrentBootstrap` 先关闭准入，核验 SIP 全量与 Agent/Asterisk 已加载 revision、读取任务和 provider/额度，再排空 MQ 控制积压，最后依据已验证 SIP revision 开准入；有更新的持久 SIP 通知时保持关闭但控制与结果处理仍可继续。`CurrentDiscoveryFollower` 逐页绑定任务快照；HTTP 错误、失效或授权不一致只失败，不回退旧读取。**目前只在隔离运行组件中调用，尚未接入 `cmd/sip-go-agent/main.go`；provider 向真实 Agent 交付及真实加载尚待 P05/P07。**
 - TDD 与回归：`go test ./internal/configread ./internal/tenant ./internal/store ./internal/dispatcher -count=1`、`bash scripts/check-current-contracts.sh`、已提交 `a0118e3` 的干净归档测试通过；旧布局行/表原样保留由 `TestCurrentStoreRefusesPreviousCurrentLayoutBeforeModifyingDatabase` 覆盖。