diff --git a/GLOSSARY.md b/GLOSSARY.md
index cb76b740..360a3977 100644
--- a/GLOSSARY.md
+++ b/GLOSSARY.md
@@ -292,7 +292,7 @@ _避免用词_：菜单栏形态（Menu bar form，应用形态并非恒定）
 用户明确查看或复制界面事件与后台服务日志行的入口；行正文为脱敏后的原始文本，所展示的日志行不属于诊断报告。
 
 **系统日志（System log）**：
-本应用图形界面与后台服务写入 macOS 统一日志系统、供用户在 Console.app 中按来源与类别过滤查看的本地事件流。它面向本地排错，不是诊断报告的内容来源，也不替代诊断日志视图的显式查看与复制。
+本应用图形界面、后台服务与特权系统代理 helper 写入 macOS 统一日志系统、供用户在 Console.app 中按来源与类别过滤查看的本地事件流。它面向本地排错，不是诊断报告的内容来源，也不替代诊断日志视图的显式查看与复制；特权系统代理 helper 的事件只有这一个查看面，不进诊断日志视图。
 _避免用词_：os_log 输出（实现机制名，不是领域概念）。
 
 **诊断事实（Diagnostic facts）**：
diff --git a/ShadowsocksX-NG2/Domain/Runtime/RuntimeLog.swift b/ShadowsocksX-NG2/Domain/Runtime/RuntimeLog.swift
index 4a6daaff..de5f8e35 100644
--- a/ShadowsocksX-NG2/Domain/Runtime/RuntimeLog.swift
+++ b/ShadowsocksX-NG2/Domain/Runtime/RuntimeLog.swift
@@ -184,15 +184,6 @@ extension RuntimeLogEvent {
   }
 }
 
-/// 系统日志路由事实：发射缝按此构造统一日志消息。`text` 已含与
-/// `privateDetail` 之间的分隔符，两者拼接等于事件的 `description`。
-struct SystemLogRoute: Sendable {
-  var level: OSLogType
-  var category: String
-  var text: String
-  var privateDetail: String?
-}
-
 /// 事件接收缝：GUI 进程把事件接入 RuntimeEventStore（内存环形
 /// 缓冲），供主窗口日志查看器实时呈现与诊断导出取用；wrapper 进程不注册
 /// （stderr 收敛进 agent.log）。接收方拿到的是封闭枚举原值，渲染发生在
@@ -219,18 +210,6 @@ enum Redactor {
 /// agent.log）与系统日志输出（统一 subsystem，Console.app 按 category 过滤，
 /// 拆出的 detail 段标 private）；GUI 启动时另注册接收缝接入事件缓冲。
 enum RuntimeLog {
-  /// 系统日志 subsystem：各进程共用一个名字，Console.app 一条过滤全看。
-  static let subsystem = "com.qiuyuzhou.ShadowsocksX-NG2"
-
-  /// 统一日志写入开关（测试缝）：`SSXNG_SYSTEM_LOG=0` 关闭系统日志写入，
-  /// stderr 行与事件缓冲不受影响。scheme 的测试动作注入该值，测试拉起的
-  /// 子进程在夹具 env 显式设置——测试运行不把大量日志灌进系统日志 store。
-  static let systemLogEnabled = isSystemLogEnabled(ProcessInfo.processInfo.environment)
-
-  static func isSystemLogEnabled(_ environment: [String: String]) -> Bool {
-    environment["SSXNG_SYSTEM_LOG"] != "0"
-  }
-
   private static let sinkHolder = SinkHolder()
   private static let lineSourceLock = OSAllocatedUnfairLock(initialState: LogLineSource.gui)
 
@@ -252,16 +231,7 @@ enum RuntimeLog {
     if let line = event.standardErrorLine(timestamp: now) {
       FileHandle.standardError.write(Data(line.utf8))
     }
-    if systemLogEnabled {
-      let route = event.systemLogRoute
-      let logger = Logger(subsystem: subsystem, category: route.category)
-      if let detail = route.privateDetail {
-        logger.log(
-          level: route.level, "\(route.text, privacy: .public)\(detail, privacy: .private)")
-      } else {
-        logger.log(level: route.level, "\(route.text, privacy: .public)")
-      }
-    }
+    SystemLog.emit(event.systemLogRoute)
     sinkHolder.current?.append(event: event, timestamp: now)
   }
 
diff --git a/ShadowsocksX-NG2/Domain/Runtime/SslocalOutputIntake.swift b/ShadowsocksX-NG2/Domain/Runtime/SslocalOutputIntake.swift
index d7cc628f..81405c9d 100644
--- a/ShadowsocksX-NG2/Domain/Runtime/SslocalOutputIntake.swift
+++ b/ShadowsocksX-NG2/Domain/Runtime/SslocalOutputIntake.swift
@@ -29,11 +29,11 @@ struct SslocalStandardErrorDestination: SslocalLineDestination {
 /// 获得时间戳、category、level 与行数关联；stderr/agent.log 通路没有这些
 /// 可过滤维度。级别由 intake 探测，这里只投影到统一日志五级。
 struct SslocalUnifiedLogDestination: SslocalLineDestination {
-  private let logger = Logger(subsystem: RuntimeLog.subsystem, category: "sslocal")
+  private let logger = Logger(subsystem: SystemLog.subsystem, category: "sslocal")
 
   func receive(_ row: LogLine) {
     // 统一日志写入受测试缝控制（SSXNG_SYSTEM_LOG=0 关闭），agent.log 去向不受影响。
-    guard RuntimeLog.systemLogEnabled else { return }
+    guard SystemLog.systemLogEnabled else { return }
     logger.log(level: OSLogType(row.level), "\(row.text, privacy: .private)")
   }
 }
diff --git a/ShadowsocksX-NG2/Domain/Runtime/SystemLog.swift b/ShadowsocksX-NG2/Domain/Runtime/SystemLog.swift
new file mode 100644
index 00000000..55264c2e
--- /dev/null
+++ b/ShadowsocksX-NG2/Domain/Runtime/SystemLog.swift
@@ -0,0 +1,42 @@
+import Foundation
+import os
+
+/// 统一日志（Unified Logging）最小发射单元：GUI、wrapper 与特权
+/// helper 三个进程共用同一 subsystem，Console.app 一条过滤即可对照
+/// 各进程事件。发射的事实（level/category/text/privateDetail）由调用方的
+/// 封闭事件枚举给出；privacy 拆分口径与去向取舍见 ADR-0045，特权 helper
+/// 的接入边界见 ADR-0047。
+enum SystemLog {
+  /// 系统日志 subsystem：各进程共用一个名字，Console.app 一条过滤全看。
+  static let subsystem = "com.qiuyuzhou.ShadowsocksX-NG2"
+
+  /// 统一日志写入开关（测试缝）：`SSXNG_SYSTEM_LOG=0` 关闭系统日志写入，
+  /// stderr 行与事件缓冲不受影响。scheme 的测试动作注入该值，测试拉起的
+  /// 子进程在夹具 env 显式设置——测试运行不把大量日志灌进系统日志 store。
+  static let systemLogEnabled = isSystemLogEnabled(ProcessInfo.processInfo.environment)
+
+  static func isSystemLogEnabled(_ environment: [String: String]) -> Bool {
+    environment["SSXNG_SYSTEM_LOG"] != "0"
+  }
+
+  /// 按路由发射一条统一日志消息：公开文本标 public，自由 detail 段标
+  /// private（普通视图显示 `<private>`）。写入开关关闭时整体跳过。
+  static func emit(_ route: SystemLogRoute) {
+    guard systemLogEnabled else { return }
+    let logger = Logger(subsystem: subsystem, category: route.category)
+    if let detail = route.privateDetail {
+      logger.log(level: route.level, "\(route.text, privacy: .public)\(detail, privacy: .private)")
+    } else {
+      logger.log(level: route.level, "\(route.text, privacy: .public)")
+    }
+  }
+}
+
+/// 系统日志路由事实：发射缝按此构造统一日志消息。`text` 已含与
+/// `privateDetail` 之间的分隔符，两者拼接等于事件的 `description`。
+struct SystemLogRoute: Sendable {
+  var level: OSLogType
+  var category: String
+  var text: String
+  var privateDetail: String?
+}
diff --git a/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperEngine.swift b/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperEngine.swift
index 828a1ec7..2acc4bec 100644
--- a/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperEngine.swift
+++ b/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperEngine.swift
@@ -26,36 +26,39 @@ final class SystemProxyHelperEngine: NSObject, SystemProxyHelperControlling {
 
   private let queue: DispatchQueue
   private let perform: Performing
+  private let log: @Sendable (SystemProxyHelperLogEvent) -> Void
 
-  init(perform: @escaping Performing, queue: DispatchQueue? = nil) {
+  /// `log` 是事件发射缝（ADR-0047）：生产直通统一日志，测试注入替身
+  /// 断言发射内容；默认参数不改变既有测试装配。
+  init(
+    perform: @escaping Performing,
+    queue: DispatchQueue? = nil,
+    log: @escaping @Sendable (SystemProxyHelperLogEvent) -> Void = SystemProxyHelperLog.emit
+  ) {
     self.perform = perform
     self.queue = queue ?? Self.sharedQueue
+    self.log = log
     super.init()
   }
 
   func apply(_ payload: Data, withReply reply: @escaping (Data) -> Void) {
     let reply = ReplyBox(reply)
-    queue.async { [perform, reply] in
+    queue.async { [perform, reply, log] in
       let request = Result { try SystemProxyHelperWire.decodeConfiguration(payload) }
-      reply(Self.responseData(request: request.map { .apply($0) }, perform: perform))
+      reply(
+        Self.loggedResponseData(request: request.map { .apply($0) }, perform: perform, log: log))
     }
   }
 
   func clear(withReply reply: @escaping (Data) -> Void) {
     let reply = ReplyBox(reply)
-    queue.async { [perform, reply] in
-      reply(Self.responseData(request: .success(.clear), perform: perform))
+    queue.async { [perform, reply, log] in
+      reply(Self.loggedResponseData(request: .success(.clear), perform: perform, log: log))
     }
   }
 
   // MARK: - 请求执行（纯逻辑，可测）
 
-  static func responseData(
-    request: Result<Request, Error>, perform: Performing
-  ) -> Data {
-    SystemProxyHelperWire.encode(response(request: request, perform: perform))
-  }
-
   static func response(
     request: Result<Request, Error>, perform: Performing
   ) -> SystemProxyHelperResponse {
@@ -73,6 +76,17 @@ final class SystemProxyHelperEngine: NSObject, SystemProxyHelperControlling {
       return .failure(.helperUnavailable(String(describing: error)))
     }
   }
+
+  /// 执行请求、按应答发射一条执行结果事件并编码应答——日志与应答同源，
+  /// 不可能记下与回传不一致的结果。
+  private static func loggedResponseData(
+    request: Result<Request, Error>, perform: Performing,
+    log: @Sendable (SystemProxyHelperLogEvent) -> Void
+  ) -> Data {
+    let response = self.response(request: request, perform: perform)
+    log(SystemProxyHelperLogEvent(response: response))
+    return SystemProxyHelperWire.encode(response)
+  }
 }
 
 /// XPC 应答闭包的 Sendable 桥。@objc 协议里 reply 参数无法标注 @Sendable，
diff --git a/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperListenerDelegate.swift b/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperListenerDelegate.swift
index ee3cc353..d6a4dac5 100644
--- a/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperListenerDelegate.swift
+++ b/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperListenerDelegate.swift
@@ -7,17 +7,21 @@ import Security
 final class SystemProxyHelperListenerDelegate: NSObject, NSXPCListenerDelegate {
   private let engine: SystemProxyHelperEngine
   private let expectedClientIdentifier: String
+  private let log: @Sendable (SystemProxyHelperLogEvent) -> Void
 
   /// 引擎由进程入口显式注入：特权写入器 SystemProxyWriter 属 helper 专属
   /// （不进共享编译单元），测试注入假写入器。期望客户端身份生产默认为 2.0
   /// bundle identifier；去宿主化（ADR 0021）后单测运行于 xctest runner，
-  /// 连接方身份随宿主改变，测试注入本进程实际签名 identifier。
+  /// 连接方身份随宿主改变，测试注入本进程实际签名 identifier。`log` 是
+  /// 事件发射缝（ADR-0047）：连接接受/拒绝各记一条。
   init(
     engine: SystemProxyHelperEngine,
-    expectedClientIdentifier: String = SystemProxyHelperIdentity.clientCodeSigningIdentifier
+    expectedClientIdentifier: String = SystemProxyHelperIdentity.clientCodeSigningIdentifier,
+    log: @escaping @Sendable (SystemProxyHelperLogEvent) -> Void = SystemProxyHelperLog.emit
   ) {
     self.engine = engine
     self.expectedClientIdentifier = expectedClientIdentifier
+    self.log = log
     super.init()
   }
 
@@ -28,7 +32,11 @@ final class SystemProxyHelperListenerDelegate: NSObject, NSXPCListenerDelegate {
     guard
       SystemProxyClientValidator.clientSigningIdentifier(newConnection)
         == expectedClientIdentifier
-    else { return false }
+    else {
+      log(.connectionRejected(pid: newConnection.processIdentifier))
+      return false
+    }
+    log(.connectionAccepted(pid: newConnection.processIdentifier))
     newConnection.exportedInterface = NSXPCInterface(with: SystemProxyHelperControlling.self)
     newConnection.exportedObject = engine
     newConnection.resume()
diff --git a/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperLog.swift b/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperLog.swift
new file mode 100644
index 00000000..c2537629
--- /dev/null
+++ b/ShadowsocksX-NG2/Domain/SystemProxy/SystemProxyHelperLog.swift
@@ -0,0 +1,116 @@
+import Foundation
+import os
+
+/// 特权系统代理 helper 的封闭事件枚举：helper 侧的执行事实只进
+/// 统一日志（Console.app 按 subsystem 查看），无文件面——不写 stderr、
+/// 不进 agent.log、诊断日志视图与诊断报告（ADR-0006 不新增披露面）。
+/// 事件面是生命周期最小集：拉起就绪、连接接受/拒绝与每个请求的 typed
+/// 结果；不记 payload 内容（例外列表等）。GUI 侧 XPC 结果转述照旧，root
+/// 侧事件与之在 Console 按同一 subsystem 相邻对照（ADR-0047）。
+enum SystemProxyHelperLogEvent: Equatable, Sendable, CustomStringConvertible {
+  /// helper 进程已拉起并开始监听（launchd on-demand 激活的唯一痕迹）。
+  case listenerReady
+  /// 已接受签名标识合规的客户端连接（对端 pid 为本机事实字段）。
+  case connectionAccepted(pid: Int32)
+  /// 拒绝签名标识不符的客户端连接（谁在敲门的唯一痕迹）。
+  case connectionRejected(pid: Int32)
+  /// apply 请求成功（written/unchanged 由 typed 结果给出）。
+  case applyCompleted(SystemProxyWriteOutcome)
+  /// clear 请求成功。
+  case clearCompleted
+  /// 请求失败（typed 错误族；自由 detail 段发射时标 private）。
+  case requestFailed(SystemProxyError)
+
+  /// 从 XPC 应答派生执行结果事件；引擎把解码失败与执行异常都归入
+  /// typed 失败应答，这里不区分来源。
+  init(response: SystemProxyHelperResponse) {
+    switch response {
+    case .applied(let outcome): self = .applyCompleted(outcome)
+    case .cleared: self = .clearCompleted
+    case .failure(let error): self = .requestFailed(error)
+    }
+  }
+
+  /// 事件完整文本：typed 枚举文本 + 自由 detail 段。拆分规则沿
+  /// ADR-0045：公开文本由本描述尾部裁切派生，不手抄前缀。
+  var description: String {
+    switch self {
+    case .listenerReady:
+      return "system proxy helper listening"
+    case .connectionAccepted(let pid):
+      return "system proxy helper connection accepted (pid=\(pid))"
+    case .connectionRejected(let pid):
+      return "system proxy helper connection rejected (pid=\(pid))"
+    case .applyCompleted(let outcome):
+      switch outcome {
+      case .written:
+        return "system proxy helper apply completed (outcome=written)"
+      case .unchanged:
+        return "system proxy helper apply completed (outcome=unchanged)"
+      }
+    case .clearCompleted:
+      return "system proxy helper clear completed"
+    case .requestFailed(let error):
+      let parts = error.logParts
+      guard let detail = parts.detail else {
+        return "system proxy helper request failed: \(parts.text)"
+      }
+      return "system proxy helper request failed: \(parts.text): \(detail)"
+    }
+  }
+
+  /// 发射时标 private 的自由 detail 段：恰为 `description` 的尾段。
+  private var privateDetail: String? {
+    guard case .requestFailed(let error) = self else { return nil }
+    return error.logParts.detail
+  }
+
+  /// 系统日志路由：失败类 error、里程碑 default；category 沿用
+  /// `system-proxy`，与 GUI 侧 `.systemProxyWriteFailed` 同类可对照。
+  var logRoute: SystemLogRoute {
+    switch self {
+    case .listenerReady, .connectionAccepted, .applyCompleted, .clearCompleted:
+      return route(level: .default)
+    case .connectionRejected, .requestFailed:
+      return route(level: .error)
+    }
+  }
+
+  private func route(level: OSLogType) -> SystemLogRoute {
+    guard let detail = privateDetail else {
+      return SystemLogRoute(
+        level: level, category: "system-proxy", text: description, privateDetail: nil)
+    }
+    return SystemLogRoute(
+      level: level, category: "system-proxy",
+      text: String(description.dropLast(detail.count)), privateDetail: detail)
+  }
+}
+
+/// 事件发射缝：生产直通统一日志；测试注入替身断言发射。
+enum SystemProxyHelperLog {
+  static func emit(_ event: SystemProxyHelperLogEvent) {
+    SystemLog.emit(event.logRoute)
+  }
+}
+
+extension SystemProxyError {
+  /// 统一日志文本拆分：公开的 typed 错误名与待标 private 的自由 detail
+  /// 段（服务标识或 SC/XPC 错误文本）。
+  var logParts: (text: String, detail: String?) {
+    switch self {
+    case .preferencesUnavailable: return ("preferences unavailable", nil)
+    case .preferencesBusy: return ("preferences busy", nil)
+    case .noCurrentNetworkSet: return ("no current network set", nil)
+    case .noNetworkLocations: return ("no network locations", nil)
+    case .noProxyServices: return ("no proxy services", nil)
+    case .unreadableService(let detail): return ("unreadable service", detail)
+    case .invalidStoredConfiguration(let detail): return ("invalid stored configuration", detail)
+    case .cannotWriteService(let detail): return ("cannot write service", detail)
+    case .commitFailed(let detail): return ("commit failed", detail)
+    case .applyFailed(let detail): return ("apply failed", detail)
+    case .invalidRequest(let detail): return ("invalid request", detail)
+    case .helperUnavailable(let detail): return ("helper unavailable", detail)
+    }
+  }
+}
diff --git a/ShadowsocksX-NG2/SystemProxyHelper/main.swift b/ShadowsocksX-NG2/SystemProxyHelper/main.swift
index 0d463de2..9f6d95f9 100644
--- a/ShadowsocksX-NG2/SystemProxyHelper/main.swift
+++ b/ShadowsocksX-NG2/SystemProxyHelper/main.swift
@@ -8,4 +8,7 @@ let delegate = SystemProxyHelperListenerDelegate(
 let listener = NSXPCListener(machServiceName: SystemProxyHelperIdentity.machServiceName)
 listener.delegate = delegate
 listener.resume()
+// 拉起就绪事件只进统一日志（ADR-0047）：launchd 丢弃本进程 stdout/stderr，
+// 这是「helper 是否被拉起」的唯一痕迹。
+SystemProxyHelperLog.emit(.listenerReady)
 dispatchMain()
diff --git a/ShadowsocksX-NG2/Tests/Runtime/RuntimeLogSystemLogSwitchTests.swift b/ShadowsocksX-NG2/Tests/Runtime/RuntimeLogSystemLogSwitchTests.swift
deleted file mode 100644
index 7e2e8ebd..00000000
--- a/ShadowsocksX-NG2/Tests/Runtime/RuntimeLogSystemLogSwitchTests.swift
+++ /dev/null
@@ -1,11 +0,0 @@
-import Testing
-
-@testable import ShadowsocksX_NG2
-
-struct RuntimeLogSystemLogSwitchTests {
-  @Test func systemLogIsDisabledOnlyByExplicitZero() {
-    #expect(RuntimeLog.isSystemLogEnabled([:]))
-    #expect(RuntimeLog.isSystemLogEnabled(["SSXNG_SYSTEM_LOG": "1"]))
-    #expect(!RuntimeLog.isSystemLogEnabled(["SSXNG_SYSTEM_LOG": "0"]))
-  }
-}
diff --git a/ShadowsocksX-NG2/Tests/Runtime/SystemLogSwitchTests.swift b/ShadowsocksX-NG2/Tests/Runtime/SystemLogSwitchTests.swift
new file mode 100644
index 00000000..19f7d88b
--- /dev/null
+++ b/ShadowsocksX-NG2/Tests/Runtime/SystemLogSwitchTests.swift
@@ -0,0 +1,11 @@
+import Testing
+
+@testable import ShadowsocksX_NG2
+
+struct SystemLogSwitchTests {
+  @Test func systemLogIsDisabledOnlyByExplicitZero() {
+    #expect(SystemLog.isSystemLogEnabled([:]))
+    #expect(SystemLog.isSystemLogEnabled(["SSXNG_SYSTEM_LOG": "1"]))
+    #expect(!SystemLog.isSystemLogEnabled(["SSXNG_SYSTEM_LOG": "0"]))
+  }
+}
diff --git a/ShadowsocksX-NG2/Tests/Support/ProcessSigningIdentifier.swift b/ShadowsocksX-NG2/Tests/Support/ProcessSigningIdentifier.swift
new file mode 100644
index 00000000..799a8cdc
--- /dev/null
+++ b/ShadowsocksX-NG2/Tests/Support/ProcessSigningIdentifier.swift
@@ -0,0 +1,21 @@
+import Foundation
+import Security
+
+/// 本进程的代码签名 identifier（与生产 SystemProxyClientValidator 同一
+/// SecCode 查询路径，对自身用 SecCodeCopySelf 取 code）。去宿主化（ADR 0021）
+/// 后单测运行于 xctest runner，XPC 连接方身份随宿主改变；helper XPC 装配
+/// 测试以本值注入期望客户端身份，无需 launchd。
+enum ProcessSigningIdentifier {
+  static func current() -> String? {
+    var code: SecCode?
+    guard SecCodeCopySelf([], &code) == errSecSuccess, let code else { return nil }
+    var staticCode: SecStaticCode?
+    guard SecCodeCopyStaticCode(code, [], &staticCode) == errSecSuccess, let staticCode
+    else { return nil }
+    var information: CFDictionary?
+    guard SecCodeCopySigningInformation(staticCode, SecCSFlags(), &information) == errSecSuccess,
+      let information
+    else { return nil }
+    return (information as NSDictionary)[kSecCodeInfoIdentifier] as? String
+  }
+}
diff --git a/ShadowsocksX-NG2/Tests/SystemProxy/SystemProxyHelperLogTests.swift b/ShadowsocksX-NG2/Tests/SystemProxy/SystemProxyHelperLogTests.swift
new file mode 100644
index 00000000..58ce7a8b
--- /dev/null
+++ b/ShadowsocksX-NG2/Tests/SystemProxy/SystemProxyHelperLogTests.swift
@@ -0,0 +1,216 @@
+import Foundation
+import Testing
+
+@testable import ShadowsocksX_NG2
+
+/// 特权 helper 事件的统一日志路由与发射缝测试（ADR-0047）：route 是纯
+/// 函数，断言 level/category/公开文本与 privacy 拆分；engine 与 listener
+/// 经注入替身断言发射调用。测试不写真实系统日志 store（scheme 注入
+/// SSXNG_SYSTEM_LOG=0），也不触真实 SystemConfiguration。
+@Suite struct SystemProxyHelperLogTests {
+  private let configuration = SystemProxyConfiguration(
+    socks: .init(host: "127.0.0.1", port: 1086),
+    http: .init(host: "127.0.0.1", port: 1087),
+    https: .init(host: "127.0.0.1", port: 1087),
+    exceptions: ["localhost"])
+
+  /// 并发闭包与断言之间的线程安全事件交接。
+  private final class EventRecorder: @unchecked Sendable {
+    private let lock = NSLock()
+    private var events: [SystemProxyHelperLogEvent] = []
+
+    func append(_ event: SystemProxyHelperLogEvent) {
+      lock.lock()
+      events.append(event)
+      lock.unlock()
+    }
+
+    var all: [SystemProxyHelperLogEvent] {
+      lock.lock()
+      defer { lock.unlock() }
+      return events
+    }
+  }
+
+  // MARK: - route（纯函数）
+
+  @Test func lifecycleEventsRouteToSystemProxyCategory() {
+    let ready = SystemProxyHelperLogEvent.listenerReady.logRoute
+    #expect(ready.level == .default)
+    #expect(ready.category == "system-proxy")
+    #expect(ready.text == "system proxy helper listening")
+    #expect(ready.privateDetail == nil)
+
+    let accepted = SystemProxyHelperLogEvent.connectionAccepted(pid: 42).logRoute
+    #expect(accepted.level == .default)
+    #expect(accepted.text == "system proxy helper connection accepted (pid=42)")
+    #expect(accepted.privateDetail == nil)
+
+    let rejected = SystemProxyHelperLogEvent.connectionRejected(pid: 7).logRoute
+    #expect(rejected.level == .error)
+    #expect(rejected.text == "system proxy helper connection rejected (pid=7)")
+    #expect(rejected.privateDetail == nil)
+  }
+
+  @Test func requestResultsRouteAsMilestones() {
+    let written = SystemProxyHelperLogEvent.applyCompleted(.written).logRoute
+    #expect(written.level == .default)
+    #expect(written.text == "system proxy helper apply completed (outcome=written)")
+
+    let unchanged = SystemProxyHelperLogEvent.applyCompleted(.unchanged).logRoute
+    #expect(unchanged.level == .default)
+    #expect(unchanged.text == "system proxy helper apply completed (outcome=unchanged)")
+
+    let cleared = SystemProxyHelperLogEvent.clearCompleted.logRoute
+    #expect(cleared.level == .default)
+    #expect(cleared.text == "system proxy helper clear completed")
+  }
+
+  @Test func requestFailureKeepsFreeDetailPrivate() {
+    let event = SystemProxyHelperLogEvent.requestFailed(
+      .commitFailed("SCPreferencesCommitChanges: busy"))
+    let route = event.logRoute
+    #expect(route.level == .error)
+    #expect(route.category == "system-proxy")
+    #expect(route.text == "system proxy helper request failed: commit failed: ")
+    #expect(route.privateDetail == "SCPreferencesCommitChanges: busy")
+    #expect(route.text + route.privateDetail! == event.description, "text+detail == description")
+  }
+
+  @Test func requestFailureWithoutDetailHasNoPrivateSegment() {
+    let event = SystemProxyHelperLogEvent.requestFailed(.preferencesBusy)
+    #expect(event.logRoute.text == "system proxy helper request failed: preferences busy")
+    #expect(event.logRoute.privateDetail == nil)
+    #expect(event.description == "system proxy helper request failed: preferences busy")
+  }
+
+  @Test func errorCasesSplitDetailFromPublicText() {
+    #expect(SystemProxyError.unreadableService("svc-1").logParts.text == "unreadable service")
+    #expect(SystemProxyError.unreadableService("svc-1").logParts.detail == "svc-1")
+    #expect(SystemProxyError.invalidRequest("bad json").logParts.detail == "bad json")
+    #expect(SystemProxyError.helperUnavailable("timeout").logParts.detail == "timeout")
+    #expect(SystemProxyError.preferencesUnavailable.logParts.detail == nil)
+    #expect(SystemProxyError.noProxyServices.logParts.detail == nil)
+    #expect(SystemProxyError.noCurrentNetworkSet.logParts.detail == nil)
+    #expect(SystemProxyError.noNetworkLocations.logParts.detail == nil)
+    #expect(SystemProxyError.invalidStoredConfiguration("svc-2").logParts.detail == "svc-2")
+    #expect(SystemProxyError.cannotWriteService("svc-3").logParts.detail == "svc-3")
+    #expect(SystemProxyError.applyFailed("SCError").logParts.detail == "SCError")
+  }
+
+  @Test func eventsDeriveFromTypedResponses() {
+    #expect(SystemProxyHelperLogEvent(response: .applied(.written)) == .applyCompleted(.written))
+    #expect(SystemProxyHelperLogEvent(response: .cleared) == .clearCompleted)
+    #expect(
+      SystemProxyHelperLogEvent(response: .failure(.noProxyServices))
+        == .requestFailed(.noProxyServices))
+  }
+
+  // MARK: - 发射缝（engine 注入替身）
+
+  @Test func engineEmitsTypedApplyResult() async throws {
+    let recorder = EventRecorder()
+    let engine = SystemProxyHelperEngine(perform: { _ in .applied(.written) }, log: recorder.append)
+    let payload = try SystemProxyHelperWire.encodeConfiguration(configuration)
+    await withCheckedContinuation { (continuation: CheckedContinuation<Void, Never>) in
+      engine.apply(payload) { _ in continuation.resume() }
+    }
+    #expect(recorder.all == [.applyCompleted(.written)])
+  }
+
+  @Test func engineEmitsClearResult() async {
+    let recorder = EventRecorder()
+    let engine = SystemProxyHelperEngine(perform: { _ in .cleared }, log: recorder.append)
+    await withCheckedContinuation { (continuation: CheckedContinuation<Void, Never>) in
+      engine.clear { _ in continuation.resume() }
+    }
+    #expect(recorder.all == [.clearCompleted])
+  }
+
+  @Test func engineEmitsFailureForUndecodablePayload() async {
+    let recorder = EventRecorder()
+    let engine = SystemProxyHelperEngine(perform: { _ in .cleared }, log: recorder.append)
+    await withCheckedContinuation { (continuation: CheckedContinuation<Void, Never>) in
+      engine.apply(Data("not json".utf8)) { _ in continuation.resume() }
+    }
+    guard case .requestFailed(let error) = recorder.all.first else {
+      Issue.record("无效 payload 应发射 requestFailed，实际 \(recorder.all)")
+      return
+    }
+    #expect(error.logParts.text == "invalid request")
+    #expect(error.logParts.detail != nil)
+  }
+
+  // MARK: - 发射缝（listener 注入替身，真实匿名 XPC）
+
+  @Test func listenerEmitsAcceptedConnectionBeforeRequestResult() async throws {
+    let recorder = EventRecorder()
+    let engine = SystemProxyHelperEngine(perform: { _ in .cleared }, log: recorder.append)
+    let delegate = SystemProxyHelperListenerDelegate(
+      engine: engine,
+      expectedClientIdentifier: try #require(ProcessSigningIdentifier.current()),
+      log: recorder.append)
+    let listener = NSXPCListener.anonymous()
+    listener.delegate = delegate
+    listener.resume()
+    defer { listener.invalidate() }
+
+    let connection = NSXPCConnection(listenerEndpoint: listener.endpoint)
+    connection.remoteObjectInterface = NSXPCInterface(with: SystemProxyHelperControlling.self)
+    connection.resume()
+    defer { connection.invalidate() }
+
+    let proxy = try #require(
+      connection.remoteObjectProxyWithErrorHandler { _ in } as? SystemProxyHelperControlling)
+    await withCheckedContinuation { (continuation: CheckedContinuation<Void, Never>) in
+      proxy.clear { _ in continuation.resume() }
+    }
+    #expect(recorder.all == [.connectionAccepted(pid: getpid()), .clearCompleted])
+  }
+
+  @Test func listenerEmitsRejectedConnection() async {
+    let recorder = EventRecorder()
+    let engine = SystemProxyHelperEngine(perform: { _ in .cleared }, log: recorder.append)
+    let delegate = SystemProxyHelperListenerDelegate(
+      engine: engine,
+      expectedClientIdentifier: "com.example.not-the-client",
+      log: recorder.append)
+    let listener = NSXPCListener.anonymous()
+    listener.delegate = delegate
+    listener.resume()
+    defer { listener.invalidate() }
+
+    let connection = NSXPCConnection(listenerEndpoint: listener.endpoint)
+    connection.remoteObjectInterface = NSXPCInterface(with: SystemProxyHelperControlling.self)
+    // XPC 惰性连接：发一条消息才触发服务端签名校验；被拒绝的连接以失效
+    // （或代理错误回调）告终。超时兜底避免挂死，超时后事件断言自然失败。
+    await withCheckedContinuation { (continuation: CheckedContinuation<Void, Never>) in
+      let once = ResumeOnce(continuation)
+      connection.invalidationHandler = { once.resume() }
+      connection.resume()
+      let proxy = connection.remoteObjectProxyWithErrorHandler { _ in once.resume() }
+      (proxy as? SystemProxyHelperControlling)?.clear { _ in }
+      DispatchQueue.global().asyncAfter(deadline: .now() + 10) { once.resume() }
+    }
+    connection.invalidate()
+    #expect(recorder.all == [.connectionRejected(pid: getpid())])
+  }
+}
+
+/// 只恢复一次的 continuation 装箱：失效回调与超时兜底竞争同一恢复权。
+private final class ResumeOnce: @unchecked Sendable {
+  private let lock = NSLock()
+  private var continuation: CheckedContinuation<Void, Never>?
+
+  init(_ continuation: CheckedContinuation<Void, Never>) {
+    self.continuation = continuation
+  }
+
+  func resume() {
+    lock.lock()
+    let taken = continuation
+    continuation = nil
+    lock.unlock()
+    taken?.resume()
+  }
+}
diff --git a/ShadowsocksX-NG2/Tests/SystemProxy/SystemProxyHelperXPCRoundTripTests.swift b/ShadowsocksX-NG2/Tests/SystemProxy/SystemProxyHelperXPCRoundTripTests.swift
index 470c7eee..371824f6 100644
--- a/ShadowsocksX-NG2/Tests/SystemProxy/SystemProxyHelperXPCRoundTripTests.swift
+++ b/ShadowsocksX-NG2/Tests/SystemProxy/SystemProxyHelperXPCRoundTripTests.swift
@@ -1,5 +1,4 @@
 import Foundation
-import Security
 import XCTest
 
 @testable import ShadowsocksX_NG2
@@ -21,7 +20,7 @@ final class SystemProxyHelperXPCRoundTripTests: XCTestCase {
     })
     let delegate = SystemProxyHelperListenerDelegate(
       engine: engine,
-      expectedClientIdentifier: try XCTUnwrap(Self.currentProcessSigningIdentifier()))
+      expectedClientIdentifier: try XCTUnwrap(ProcessSigningIdentifier.current()))
     let listener = NSXPCListener.anonymous()
     listener.delegate = delegate
     listener.resume()
@@ -69,19 +68,4 @@ final class SystemProxyHelperXPCRoundTripTests: XCTestCase {
     await fulfillment(of: [clearReplied], timeout: 10)
     XCTAssertEqual(clearedResponse, .cleared)
   }
-
-  /// 本进程的代码签名 identifier（与生产 SystemProxyClientValidator 同一
-  /// SecCode 查询路径，对自身用 SecCodeCopySelf 取 code）。
-  private static func currentProcessSigningIdentifier() -> String? {
-    var code: SecCode?
-    guard SecCodeCopySelf([], &code) == errSecSuccess, let code else { return nil }
-    var staticCode: SecStaticCode?
-    guard SecCodeCopyStaticCode(code, [], &staticCode) == errSecSuccess, let staticCode
-    else { return nil }
-    var information: CFDictionary?
-    guard SecCodeCopySigningInformation(staticCode, SecCSFlags(), &information) == errSecSuccess,
-      let information
-    else { return nil }
-    return (information as NSDictionary)[kSecCodeInfoIdentifier] as? String
-  }
 }
diff --git a/ShadowsocksX-NG2/project.yml b/ShadowsocksX-NG2/project.yml
index 54336c2c..555730c5 100644
--- a/ShadowsocksX-NG2/project.yml
+++ b/ShadowsocksX-NG2/project.yml
@@ -201,13 +201,15 @@ targets:
     platform: macOS
     sources:
       - path: Agent
-      # Agent 只共享非秘密监管协议、路径、探针与 sslocal 输出 intake，不编译
-      # sslocal 配置或凭据类型。显式文件路径变动必须同步本清单并重新生成工程。
+      # Agent 只共享非秘密监管协议、路径、探针、统一日志发射单元与
+      # sslocal 输出 intake，不编译 sslocal 配置或凭据类型。显式文件路径
+      # 变动必须同步本清单并重新生成工程。
       - path: Domain/Settings/ApplicationSupportPaths.swift
       - path: Domain/Runtime/RuntimePaths.swift
       - path: Domain/Runtime/AtomicFileWriter.swift
       - path: Domain/Runtime/RuntimeSupervision.swift
       - path: Domain/Runtime/RuntimeLog.swift
+      - path: Domain/Runtime/SystemLog.swift
       - path: Domain/Runtime/LogLine.swift
       - path: Domain/Runtime/SslocalOutputIntake.swift
       - path: Domain/Runtime/EndpointHealthProbe.swift
@@ -222,14 +224,17 @@ targets:
     sources:
       - path: SystemProxyHelper
       # helper 与 GUI 共享的 typed 契约与纯逻辑：closed typed 配置、property
-      # list 映射、计划器、XPC 协议与请求引擎。helper 不含产品
-      # 策略：不在这些文件之外做任何域判断。以下 6 条同为显式路径，移动需同步。
+      # list 映射、计划器、XPC 协议、请求引擎、helper 侧日志事件与统一日志
+      # 发射单元（helper 日志只进统一日志，ADR-0047）。helper 不含产品
+      # 策略：不在这些文件之外做任何域判断。以下 8 条同为显式路径，移动需同步。
       - path: Domain/SystemProxy/SystemProxyConfiguration.swift
       - path: Domain/SystemProxy/SystemProxyPlan.swift
       - path: Domain/SystemProxy/SystemProxyPropertyList.swift
       - path: Domain/SystemProxy/SystemProxyHelperContract.swift
       - path: Domain/SystemProxy/SystemProxyHelperEngine.swift
       - path: Domain/SystemProxy/SystemProxyHelperListenerDelegate.swift
+      - path: Domain/SystemProxy/SystemProxyHelperLog.swift
+      - path: Domain/Runtime/SystemLog.swift
     settings:
       base:
         PRODUCT_NAME: ShadowsocksX-NG2SystemProxyHelper
diff --git a/docs/adr/0045-native-oslog-unified-log-routing.md b/docs/adr/0045-native-oslog-unified-log-routing.md
index e95a0daa..44aa939a 100644
--- a/docs/adr/0045-native-oslog-unified-log-routing.md
+++ b/docs/adr/0045-native-oslog-unified-log-routing.md
@@ -11,3 +11,5 @@ sslocal 的上游自由文本是进入统一日志的第二条流，不进 `Runt
 考虑过但拒绝的选项：把上游自由文本塞进封闭枚举（破坏脱敏由构造保证的基线）；密码脱敏后把上游行标 public（服务器地址进持久 store）；再加一层地址形态正则脱敏后标 public（会漂移的正则防线）；让 intake 拥有 agent.log 截断策略（该策略属于 wrapper 事件行与 sslocal 行共写的文件去向）。`.info`/`.debug` 只在 stream 可见、不落盘，统一日志的持久面只收探测到的警告与错误，agent.log 才是完整持久面；private 字段对普通 Console 用户显示 `<private>`，正文阅读继续走 app 内诊断查看面。诊断报告的白名单投影独立于本路由，新增事件仍须显式决策（ADR-0006）。
 
 测试运行关闭统一日志写入：测试缝 `SSXNG_SYSTEM_LOG=0` 由 scheme 的测试动作注入、测试拉起的子进程在夹具显式设置，stderr 行与事件缓冲不受影响——测试不把日志灌进系统日志 store。这不是用户日志级别设置（ADR-0014 的口径不变）。
+
+**2026-10-20 补充**：统一日志的写入单元随后抽为 `SystemLog`（`Domain/Runtime/SystemLog.swift`），GUI/wrapper 的 `RuntimeLog.emit` 与特权系统代理 helper 共用它；helper 侧事件的边界（专属封闭枚举、无文件面）见 ADR-0047。
diff --git a/docs/adr/0047-privileged-helper-unified-log-only.md b/docs/adr/0047-privileged-helper-unified-log-only.md
new file mode 100644
index 00000000..4182d795
--- /dev/null
+++ b/docs/adr/0047-privileged-helper-unified-log-only.md
@@ -0,0 +1,15 @@
+# 特权 helper 事件只进统一日志
+
+**状态**：已接受（2026-10-20）。
+
+特权系统代理 helper（root LaunchDaemon）此前是日志黑洞：launchd 丢弃其 stdout/stderr，进程内零输出，helper 侧失败上下文只剩随 XPC 应答回传的 typed 错误、由 GUI 进程转述成 `.systemProxyWriteFailed`。GUI 视角不完整的场景完全没有痕迹：GUI 超时后 helper 实际做了什么、连接中途失效、helper 被 launchd 杀死或拉起失败、签名校验拒绝的连接（谁在敲门）。
+
+helper 复用统一日志的最小发射单元 `SystemLog`（`Domain/Runtime/SystemLog.swift`），与 GUI、wrapper 共用 subsystem `com.qiuyuzhou.ShadowsocksX-NG2`，category 沿用 `system-proxy`——root 侧事件与 GUI 侧 XPC detail 在 Console.app 同一过滤下按时间相邻对照。特权进程的编译面只增加两个文件：发射单元 `SystemLog` 与 helper 侧事件枚举 `SystemProxyHelperLogEvent`。
+
+helper 事件是专属封闭枚举 `SystemProxyHelperLogEvent`，不扩 `RuntimeLogEvent`：GUI 事件枚举（含连通性测量内容）不进特权进程。事件面是生命周期最小集：拉起就绪、连接接受/拒绝（含对端 pid，本机事实字段）、每个 apply/clear 请求的 typed 结果（written/unchanged/cleared 或失败 case + detail）；不记 payload 内容（例外列表等不入日志）。privacy 口径沿 ADR-0045：typed 枚举文本标 public，自由 detail 段（服务标识、SC/XPC 错误文本）标 private。
+
+事件没有文件面：不写 stderr、不进 agent.log、诊断日志视图与诊断报告（ADR-0006 不新增披露面），root 侧细节的查看路径就是 Console.app。诊断日志视图里系统代理的行仍是 GUI 侧转述。发射缝可注入（engine 与 listener 的构造参数，生产默认 `SystemProxyHelperLog.emit`），测试注入替身断言发射内容；`SSXNG_SYSTEM_LOG=0` 测试静默缝照旧。
+
+考虑过但拒绝的选项：扩 `RuntimeLogEvent` 并让 helper 编译 `RuntimeLog.swift`（特权进程背上 GUI 全事件面，编译面扩大）；helper 直写 `os.Logger`（privacy 拆分与测试缝两处重复）；OSLogStore 回读并入诊断日志视图（helper 事件文本公开、回读可读全，但引入读系统日志的测试面与真实 store 写入，与测试静默缝相互作用，复杂度不值当前失败面）；GUI 在失败应答时把 root 事件转记进视图（只覆盖应答成功的场景，超时与断连仍缺，恰是本决策要补的面）。
+
+helper 与 GUI 的 XPC 契约不变，不加请求关联 id：helper 请求串行执行，同一 subsystem 下的时间戳与串行顺序足以对照两侧事件。
diff --git a/docs/project-structure.md b/docs/project-structure.md
index e69da90a..fc207118 100644
--- a/docs/project-structure.md
+++ b/docs/project-structure.md
@@ -22,14 +22,14 @@
   - `Catalog/` — 配置目录树、结构不变量错误、目录文件存储、节点与凭据身份，以及 `ss://` 编解码 `SsUri`。
   - `Subscription/` — 订阅文档解析、抓取、订阅记录与刷新失败。
   - `Rules/` — 代理模式、规则身份与匹配、内置规则快照、规则集合/浏览/分析、离线规则测试；`Rules/Custom/` 为用户自定义规则的编辑草稿、校验与存储。
-  - `Runtime/` — 代理运行服务：运行时文档与监听设置、ACL 与部署收据、路径、原子写入、文件存储、日志与事件（统一日志行 `LogLine`、sslocal 输出 intake）、端点/端口/socket 探针。
+  - `Runtime/` — 代理运行服务：运行时文档与监听设置、ACL 与部署收据、路径、原子写入、文件存储、日志与事件（统一日志发射单元 `SystemLog`、统一日志行 `LogLine`、sslocal 输出 intake）、端点/端口/socket 探针。
   - `Activation/` — 激活候选校验、激活状态机与 `RuntimeConfiguration`。
   - `Settings/` — 代理监听配置文件、独立代理控制偏好、运行计算的内存快照与静默启动偏好。
-  - `SystemProxy/` — 系统代理 typed 配置、property list 映射、计划器与特权 helper 的 XPC 契约/请求引擎。
+  - `SystemProxy/` — 系统代理 typed 配置、property list 映射、计划器、特权 helper 的 XPC 契约/请求引擎与 helper 侧日志事件。
   - `Plugin/` — 托管插件、用户插件映射与插件安全校验。
   - `Credentials/`、`LegacyImport/`、`Diagnostics/` — 主密钥存储与加密文件提交、旧版导入、诊断报告。
 
-  跨进程契约按**文件**编入其它 target：`Runtime/` 的 8 个文件和 `Settings/ApplicationSupportPaths.swift` 同时编入 wrapper（`RuntimePaths`、`RuntimeSupervision`、`RuntimeLog`、`LogLine`、`SslocalOutputIntake` 等），`SystemProxy/` 全部 6 个文件编入特权 helper。`project.yml` 里这 15 条是显式路径，在 `Domain/` 内移动文件必须同步，漏改会让 `xcodegen generate` 以缺文件直接失败。布局守卫（`Tests/Architecture/SkeletonTests.swift` 的 `DomainLayoutTests`）断言根下无平铺 `.swift`、树下只有 `.swift`（非源码文件会被 XcodeGen 收进 Resources 阶段并封进签名后的 bundle）。
+  跨进程契约按**文件**编入其它 target：`Runtime/` 的 9 个文件和 `Settings/ApplicationSupportPaths.swift` 同时编入 wrapper（`RuntimePaths`、`RuntimeSupervision`、`RuntimeLog`、`SystemLog`、`LogLine`、`SslocalOutputIntake` 等），`SystemProxy/` 全部 7 个文件连同 `Runtime/SystemLog.swift` 编入特权 helper（helper 侧日志只进统一日志，ADR-0047）。`project.yml` 里这 18 条是显式路径，在 `Domain/` 内移动文件必须同步，漏改会让 `xcodegen generate` 以缺文件直接失败。布局守卫（`Tests/Architecture/SkeletonTests.swift` 的 `DomainLayoutTests`）断言根下无平铺 `.swift`、树下只有 `.swift`（非源码文件会被 XcodeGen 收进 Resources 阶段并封进签名后的 bundle）。
 - `Tests/` — 单元测试 target，随 `ShadowsocksX-NG2` scheme 运行。目录即主题，根下不留平铺测试文件：
   - `Architecture/` — 跨切面工程约束守卫（分层与布局、平台效应 seam、开窗落点、清单完整性），扫源码或构建产物而不驱动行为。
   - `TestSupport/` — 测试等待与清理 helper 的故障回归用例。