diff --git a/back/api/cron.ts b/back/api/cron.ts
index 0067a0c8..3c61dd46 100644
--- a/back/api/cron.ts
+++ b/back/api/cron.ts
@@ -5,10 +5,7 @@ import CronService from '../services/cron';
 import CronViewService from '../services/cronView';
 import { celebrate, Joi } from 'celebrate';
 import { commonCronSchema } from '../validation/schedule';
-import {
-  RunningInstanceModel,
-  InstanceStatus,
-} from '../data/runningInstance';
+import { RunningInstanceModel, InstanceStatus } from '../data/runningInstance';
 import { t } from '../shared/i18n';
 
 const route = Router();
@@ -313,7 +310,11 @@ export default (app: Router) => {
       try {
         const cronService = Container.get(CronService);
         const result = await cronService.log(req.params.id);
-        return res.send({ code: 200, data: result.content, logStatus: result.status });
+        return res.send({
+          code: 200,
+          data: result.content,
+          logStatus: result.status,
+        });
       } catch (e) {
         return next(e);
       }
@@ -435,6 +436,11 @@ export default (app: Router) => {
         last_running_time: Joi.number().optional().allow(null),
         last_execution_time: Joi.number().optional().allow(null),
         exit_code: Joi.number().optional().allow(null),
+        execution_id: Joi.string()
+          .pattern(
+            /^legacy-system:[1-9][0-9]{0,12}:[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/u,
+          )
+          .optional(),
       }),
     }),
     async (req: Request, res: Response, next: NextFunction) => {
@@ -483,7 +489,11 @@ export default (app: Router) => {
         instanceId: Joi.number().required(),
       }),
     }),
-    async (req: Request<{ id: number; instanceId: number }>, res: Response, next: NextFunction) => {
+    async (
+      req: Request<{ id: number; instanceId: number }>,
+      res: Response,
+      next: NextFunction,
+    ) => {
       try {
         const cronService = Container.get(CronService);
         const data = await cronService.stopInstance(req.params.instanceId);
diff --git a/back/runtime/application/legacyShadowRunWriter.ts b/back/runtime/application/legacyShadowRunWriter.ts
index 5ae923cb..4c82b7b6 100644
--- a/back/runtime/application/legacyShadowRunWriter.ts
+++ b/back/runtime/application/legacyShadowRunWriter.ts
@@ -1,3 +1,4 @@
+import { createHash } from 'node:crypto';
 import { v7 as uuidV7 } from 'uuid';
 import type {
   RunAttemptRecord,
@@ -43,6 +44,38 @@ export interface LegacyShadowRunReference {
 
 export type ShadowIdFactory = () => string;
 
+function deterministicShadowId(
+  requestId: string,
+  acceptedAtMs: number,
+  domain: 'run' | 'attempt',
+): string {
+  if (
+    !/^[A-Za-z0-9][A-Za-z0-9._:-]{0,127}$/u.test(requestId) ||
+    !Number.isSafeInteger(acceptedAtMs) ||
+    acceptedAtMs < 0 ||
+    acceptedAtMs > 0xffffffffffff
+  ) {
+    throw new TypeError('Invalid deterministic Legacy Shadow identity');
+  }
+  const bytes = createHash('sha256')
+    .update(`qinglong:legacy-shadow:${domain}:`)
+    .update(requestId)
+    .digest()
+    .subarray(0, 16);
+  let timestamp = acceptedAtMs;
+  for (let index = 5; index >= 0; index -= 1) {
+    bytes[index] = timestamp & 0xff;
+    timestamp = Math.floor(timestamp / 256);
+  }
+  bytes[6] = (bytes[6] & 0x0f) | 0x70;
+  bytes[8] = (bytes[8] & 0x3f) | 0x80;
+  const value = bytes.toString('hex');
+  return `${value.slice(0, 8)}-${value.slice(8, 12)}-${value.slice(
+    12,
+    16,
+  )}-${value.slice(16, 20)}-${value.slice(20)}`;
+}
+
 export class LegacyShadowRunWriter {
   constructor(
     private readonly repository: RunRepository,
@@ -52,10 +85,25 @@ export class LegacyShadowRunWriter {
   async accept(
     fact: LegacyExecutionAcceptedFact,
   ): Promise<LegacyShadowRunReference> {
-    const reference = {
-      runId: this.createId(),
-      attemptId: this.createId(),
-    };
+    const reference =
+      fact.requestId === undefined
+        ? { runId: this.createId(), attemptId: this.createId() }
+        : {
+            runId: deterministicShadowId(
+              fact.requestId,
+              fact.acceptedAtMs,
+              'run',
+            ),
+            attemptId: deterministicShadowId(
+              fact.requestId,
+              fact.acceptedAtMs,
+              'attempt',
+            ),
+          };
+    const idempotencyKey =
+      fact.requestId === undefined
+        ? undefined
+        : `legacy-shadow:${fact.origin}:${fact.requestId}`;
     const initialRun: RunRecord = {
       id: reference.runId,
       projectId: fact.projectId,
@@ -79,6 +127,7 @@ export class LegacyShadowRunWriter {
       version: 0,
       eventSequence: 0,
       priority: 0,
+      ...(idempotencyKey === undefined ? {} : { idempotencyKey }),
       createdAtMs: fact.acceptedAtMs,
     };
     const initialAttempt: RunAttemptRecord = {
@@ -91,48 +140,100 @@ export class LegacyShadowRunWriter {
       createdAtMs: fact.acceptedAtMs,
     };
 
-    await this.repository.transaction(async (transaction) => {
-      await transaction.insertRun(initialRun);
-      await transaction.insertAttempt(initialAttempt);
+    try {
+      await this.repository.transaction(async (transaction) => {
+        await transaction.insertRun(initialRun);
+        await transaction.insertAttempt(initialAttempt);
 
-      const created = reserveRunEvent(initialRun, 0);
-      const createdRun = created.run;
-      const createdUpdated = await transaction.compareAndSetRun(createdRun, 0);
-      if (!createdUpdated) {
-        throw new RunVersionConflictError(initialRun.id, 0, initialRun.version);
-      }
-      await transaction.appendEvent(
-        this.event(
+        const created = reserveRunEvent(initialRun, 0);
+        const createdRun = created.run;
+        const createdUpdated = await transaction.compareAndSetRun(
           createdRun,
-          {
-            sequence: created.sequence,
-            type: 'run.created',
-            payload: {
-              status: 'created',
-              version: createdRun.version,
-              execution_owner: 'legacy',
-              shadow: true,
+          0,
+        );
+        if (!createdUpdated) {
+          throw new RunVersionConflictError(
+            initialRun.id,
+            0,
+            initialRun.version,
+          );
+        }
+        await transaction.appendEvent(
+          this.event(
+            createdRun,
+            {
+              sequence: created.sequence,
+              type: 'run.created',
+              payload: {
+                status: 'created',
+                version: createdRun.version,
+                execution_owner: 'legacy',
+                shadow: true,
+              },
             },
-          },
-          fact.acceptedAtMs,
-        ),
-      );
+            fact.acceptedAtMs,
+          ),
+        );
 
-      const queued = transitionRun(createdRun, {
-        to: 'queued',
-        expectedVersion: createdRun.version,
-        atMs: fact.acceptedAtMs,
+        const queued = transitionRun(createdRun, {
+          to: 'queued',
+          expectedVersion: createdRun.version,
+          atMs: fact.acceptedAtMs,
+        });
+        await this.persistRunDecision(
+          transaction,
+          createdRun,
+          queued,
+          fact.acceptedAtMs,
+        );
       });
-      await this.persistRunDecision(
-        transaction,
-        createdRun,
-        queued,
-        fact.acceptedAtMs,
-      );
-    });
+    } catch (error) {
+      if (
+        fact.requestId === undefined ||
+        !(await this.isExactReplay(
+          reference,
+          initialRun,
+          initialAttempt,
+          idempotencyKey!,
+        ))
+      ) {
+        throw error;
+      }
+    }
     return reference;
   }
 
+  private async isExactReplay(
+    reference: LegacyShadowRunReference,
+    expectedRun: RunRecord,
+    expectedAttempt: RunAttemptRecord,
+    idempotencyKey: string,
+  ): Promise<boolean> {
+    const [run, attempt] = await Promise.all([
+      this.repository.findRunById(reference.runId),
+      this.repository.findAttemptById(reference.attemptId),
+    ]);
+    if (!run || !attempt) return false;
+    return (
+      run.projectId === expectedRun.projectId &&
+      run.taskId === expectedRun.taskId &&
+      run.taskRevision === expectedRun.taskRevision &&
+      run.taskName === expectedRun.taskName &&
+      run.legacyCronId === expectedRun.legacyCronId &&
+      run.triggerType === expectedRun.triggerType &&
+      run.executionOrigin === expectedRun.executionOrigin &&
+      run.executionOwner === 'legacy' &&
+      run.triggeredBy === expectedRun.triggeredBy &&
+      run.requestId === expectedRun.requestId &&
+      run.idempotencyKey === idempotencyKey &&
+      run.createdAtMs === expectedRun.createdAtMs &&
+      attempt.runId === run.id &&
+      attempt.attempt === 1 &&
+      attempt.executorType === 'legacy_local' &&
+      attempt.createdAtMs === expectedAttempt.createdAtMs
+    );
+  }
+
   async spawned(
     reference: LegacyShadowRunReference,
     fact: LegacyExecutionSpawnedFact,
diff --git a/back/runtime/compatibility/legacyExecutionBridge.ts b/back/runtime/compatibility/legacyExecutionBridge.ts
index 7adc03c4..efde7df2 100644
--- a/back/runtime/compatibility/legacyExecutionBridge.ts
+++ b/back/runtime/compatibility/legacyExecutionBridge.ts
@@ -22,6 +22,7 @@ const SHADOW_ORIGINS_ENV = 'QL3_SHADOW_ORIGINS';
 const SUPPORTED_SHADOW_ORIGINS = new Set<ExecutionOrigin>([
   'manual',
   'scheduled_node',
+  'scheduled_system',
   'script',
   'subscription',
   'system',
@@ -84,7 +85,7 @@ function readConfiguredOrigins(): ReadonlySet<ExecutionOrigin> {
         incrementFailure('configuration:unsupported_origin');
         try {
           Logger.warn(
-            '[ql3-shadow] ignored unsupported origin; this slice supports manual,scheduled_node,script,subscription,system',
+            '[ql3-shadow] ignored unsupported origin; this slice supports manual,scheduled_node,scheduled_system,script,subscription,system',
           );
         } catch {
           // Invalid compatibility configuration must not affect legacy paths.
@@ -269,6 +270,57 @@ export function observeLegacyExecution(
     : NOOP_OBSERVATION;
 }
 
+export interface LegacyShellExecutionCallbackInput {
+  pid?: number;
+  logPath?: string;
+  atMs: number;
+  phase: 'running' | 'finished';
+  exitCode?: number;
+}
+
+/**
+ * Observes one callback-owned execution without registering an in-memory
+ * ChildProcess correlation entry. The accepted fact must carry a durable
+ * requestId so callback replay can converge in the Shadow writer.
+ */
+export function observeLegacyShellExecutionCallback(
+  createFact: LegacyExecutionAcceptedFactFactory,
+  input: LegacyShellExecutionCallbackInput,
+): LegacyExecutionObservation | undefined {
+  const origin: ExecutionOrigin = 'scheduled_system';
+  let observation: LegacyExecutionObservation;
+  if (override) {
+    if (!override.origins.has(origin)) return undefined;
+    const fact = createAcceptedFactFailOpen(origin, createFact);
+    observation = fact
+      ? beginFailOpen(override.observer, fact)
+      : NOOP_OBSERVATION;
+  } else {
+    if (!readConfiguredOrigins().has(origin)) return undefined;
+    const fact = createAcceptedFactFailOpen(origin, createFact);
+    observation = fact
+      ? deferredObservation(getDefaultObserver(), fact)
+      : NOOP_OBSERVATION;
+  }
+
+  observation.spawned({
+    atMs: input.atMs,
+    ...(input.pid === undefined ? {} : { pid: input.pid }),
+    ...(input.logPath === undefined
+      ? {}
+      : { logArtifactId: createLegacyLogArtifactId(input.logPath) }),
+  });
+  if (input.phase === 'running') {
+    observation.running({ atMs: input.atMs });
+  } else {
+    observation.exited({
+      atMs: input.atMs,
+      exitCode: input.exitCode ?? 0,
+    });
+  }
+  return observation;
+}
+
 export interface LegacyExecutionCancellationInput {
   legacyCronId: number;
   pid?: number;
diff --git a/back/runtime/compatibility/legacyScheduledSystemExecution.ts b/back/runtime/compatibility/legacyScheduledSystemExecution.ts
new file mode 100644
index 00000000..b7d5074d
--- /dev/null
+++ b/back/runtime/compatibility/legacyScheduledSystemExecution.ts
@@ -0,0 +1,87 @@
+import type { Crontab } from '../../data/cron';
+import type { LegacyExecutionObservation } from '../ports/legacyExecutionObserver';
+import { observeLegacyShellExecutionCallback } from './legacyExecutionBridge';
+import { createLegacyTaskRevision } from './legacyTaskRevision';
+
+const EXECUTION_ID_PATTERN =
+  /^legacy-system:([1-9][0-9]{0,12}):([0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12})$/u;
+
+export interface LegacyScheduledSystemCallbackInput {
+  executionId: string;
+  phase: 'running' | 'finished';
+  observedAtMs: number;
+  pid?: number;
+  logPath?: string;
+  exitCode?: number;
+}
+
+export function decorateScheduledSystemCronCommand(
+  command: string,
+  systemScheduler: boolean,
+): string {
+  return systemScheduler
+    ? `QL_EXECUTION_ORIGIN=scheduled_system ${command}`
+    : command;
+}
+
+export function parseLegacyScheduledSystemExecutionId(
+  value: string,
+): { requestId: string; acceptedAtMs: number } | undefined {
+  const match = EXECUTION_ID_PATTERN.exec(value);
+  if (!match) return undefined;
+  const acceptedAtMs = Number(match[1]) * 1000;
+  if (!Number.isSafeInteger(acceptedAtMs) || acceptedAtMs < 1) return undefined;
+  return Object.freeze({ requestId: value, acceptedAtMs });
+}
+
+export function observeLegacyScheduledSystemExecution(
+  cron: Crontab,
+  input: LegacyScheduledSystemCallbackInput,
+): LegacyExecutionObservation | undefined {
+  const identity = parseLegacyScheduledSystemExecutionId(input.executionId);
+  if (
+    !identity ||
+    cron.id === undefined ||
+    !Number.isSafeInteger(input.observedAtMs) ||
+    input.observedAtMs < identity.acceptedAtMs
+  ) {
+    return undefined;
+  }
+  return observeLegacyShellExecutionCallback(
+    () => ({
+      origin: 'scheduled_system',
+      projectId: 'default',
+      taskId: `legacy-cron:${cron.id}`,
+      taskRevision: createLegacyTaskRevision({
+        command: cron.command,
+        ...(cron.schedule === undefined ? {} : { schedule: cron.schedule }),
+        extraSchedules:
+          cron.extra_schedules?.map((item) => item.schedule) ?? [],
+        ...(cron.task_before === undefined
+          ? {}
+          : { taskBefore: cron.task_before }),
+        ...(cron.task_after === undefined
+          ? {}
+          : { taskAfter: cron.task_after }),
+        ...(cron.work_dir === undefined
+          ? {}
+          : { workDirectory: cron.work_dir }),
+        ...(cron.log_name === undefined ? {} : { logName: cron.log_name }),
+      }),
+      ...(cron.name === undefined ? {} : { taskName: cron.name }),
+      legacyCronId: cron.id,
+      triggerType: 'scheduled_system',
+      triggeredBy: 'legacy:system-crond',
+      requestId: identity.requestId,
+      scheduledForMs: identity.acceptedAtMs,
+      acceptedAtMs: identity.acceptedAtMs,
+    }),
+    {
+      phase: input.phase,
+      atMs: input.observedAtMs,
+      ...(input.pid === undefined ? {} : { pid: input.pid }),
+      ...(input.logPath === undefined ? {} : { logPath: input.logPath }),
+      ...(input.exitCode === undefined ? {} : { exitCode: input.exitCode }),
+    },
+  );
+}
diff --git a/back/services/cron.ts b/back/services/cron.ts
index eeb76916..c0b40188 100644
--- a/back/services/cron.ts
+++ b/back/services/cron.ts
@@ -39,6 +39,10 @@ import {
   createLegacyLogArtifactId,
   createLegacyTaskRevision,
 } from '../runtime/compatibility/legacyTaskRevision';
+import {
+  decorateScheduledSystemCronCommand,
+  observeLegacyScheduledSystemExecution,
+} from '../runtime/compatibility/legacyScheduledSystemExecution';
 import {
   selectManualPrimaryExecutionRouter,
   stopManualPrimaryAttempt,
@@ -233,6 +237,7 @@ export default class CronService {
     last_running_time = 0,
     last_execution_time = 0,
     exit_code,
+    execution_id,
   }: {
     ids: number[];
     status: CrontabStatus;
@@ -241,6 +246,7 @@ export default class CronService {
     last_running_time: number;
     last_execution_time: number;
     exit_code?: number;
+    execution_id?: string;
   }) {
     let options: any = {
       status,
@@ -261,14 +267,26 @@ export default class CronService {
         continue;
       }
       if (status === CrontabStatus.running || status === CrontabStatus.idle) {
-        observeLegacyExecutionCallback({
-          legacyCronId: id,
-          ...(pid ? { pid } : {}),
-          ...(log_path ? { logPath: log_path } : {}),
-          atMs: Date.now(),
-          phase: status === CrontabStatus.running ? 'running' : 'finished',
-          ...(exit_code === undefined ? {} : { exitCode: exit_code }),
-        });
+        const observedAtMs = Date.now();
+        if (execution_id) {
+          observeLegacyScheduledSystemExecution(cron, {
+            executionId: execution_id,
+            ...(pid ? { pid } : {}),
+            ...(log_path ? { logPath: log_path } : {}),
+            observedAtMs,
+            phase: status === CrontabStatus.running ? 'running' : 'finished',
+            ...(exit_code === undefined ? {} : { exitCode: exit_code }),
+          });
+        } else {
+          observeLegacyExecutionCallback({
+            legacyCronId: id,
+            ...(pid ? { pid } : {}),
+            ...(log_path ? { logPath: log_path } : {}),
+            atMs: observedAtMs,
+            phase: status === CrontabStatus.running ? 'running' : 'finished',
+            ...(exit_code === undefined ? {} : { exitCode: exit_code }),
+          });
+        }
       }
       if (status === CrontabStatus.idle && log_path !== cron.log_path) {
         options = omit(options, ['status', 'log_path', 'pid']);
@@ -1046,6 +1064,7 @@ export default class CronService {
 
   private async setCrontab(data?: { data: Crontab[]; total: number }) {
     const tabs = data ?? (await this.crontabs());
+    const systemScheduler = this.schedulerMode === 'system';
     var crontab_string = '';
     tabs.data.forEach((tab) => {
       if (
@@ -1056,19 +1075,25 @@ export default class CronService {
         crontab_string += '# ';
         crontab_string += tab.schedule;
         crontab_string += ' ';
-        crontab_string += this.makeCommand(tab);
+        crontab_string += decorateScheduledSystemCronCommand(
+          this.makeCommand(tab),
+          systemScheduler,
+        );
         crontab_string += '\n';
       } else {
         crontab_string += tab.schedule;
         crontab_string += ' ';
-        crontab_string += this.makeCommand(tab);
+        crontab_string += decorateScheduledSystemCronCommand(
+          this.makeCommand(tab),
+          systemScheduler,
+        );
         crontab_string += '\n';
       }
     });
 
     await writeFileWithLock(config.crontabFile, crontab_string);
 
-    if (this.schedulerMode === 'system') {
+    if (systemScheduler) {
       try {
         execSync(`crontab ${config.crontabFile}`);
       } catch (error: any) {
diff --git a/docs/QINGLONG_3_0_ARCHITECTURE_RFC.md b/docs/QINGLONG_3_0_ARCHITECTURE_RFC.md
index 03ca8957..4ccb6796 100644
--- a/docs/QINGLONG_3_0_ARCHITECTURE_RFC.md
+++ b/docs/QINGLONG_3_0_ARCHITECTURE_RFC.md
@@ -11,6 +11,21 @@
 
 最新增量证据（2026-08-18）：
 
+- D-354/ADR-0446（已接受）：关闭 system crond Shadow 的最后一个准入身份缺口。只有实际 system scheduler 写出的
+  crontab 命令带 `QL_EXECUTION_ORIGIN=scheduled_system`；Node scheduler、manual/boot 与直接 Shell 调用不带标记，避免一次执行双记。Shell 每次
+  被标记执行只生成一个 `legacy-system:<start-seconds>:<uuid-v4>`，start/finish callback 原样复用；Linux 路由设备优先读取 kernel UUID，
+  `uuidgen`/Node 只作 fallback。后端严格校验 ID，使用专用 detached observer 从 finish-only callback 建立 accepted→spawned→exited，不伪造
+  ChildProcess。Shadow writer 以 ID/accepted time 派生稳定 UUIDv7 形态 Run/Attempt ID并复用既有 Project idempotency unique index；只有完整
+  task/Cron/origin/request/time fence 一致才接受重放，response loss、重复 finish 和迟到 start 不增加 Run/Event，定义漂移失败开放。默认仍关闭，
+  不新增 package、生产依赖、schema、migration、timer、watcher、网络重试、端口或部署对象。D-354 开始前还复核了 18 包边界：4 个小包分别是
+  六消费者文件协议叶子、高权限短生命周期维护进程、三消费者 POSIX adapter 与 Secret/keyring authority，合并会扩大依赖或权限闭包，因此保留；
+  当前没有单源码包或平铺实现包。阶段门已重跑：system crond/Bridge/Correlation 聚焦 38/38、`build:back` 与 4 个 Shell 文件语法检查、完整
+  backend 1,415 pass + 2 条条件 skip/0 fail、18-package clean build/test、14/14 静态审计与 14/14 artifact 档位全部通过；artifact
+  字节与 D-353 完全一致：基础 Edge/Standalone `2589998/2590076`、adopted `2809293/2809416`、application
+  `3632877/3632997`、application-api `3800430/3800574`、AI `3069251/3069341`、application+AI
+  `4493151/4493283`、MCP `7315930/7316038`。本阶段没有修改数据库 schema/adapter、容器或 Kubernetes 拓扑，因此没有重跑物理
+  PostgreSQL HA/K3s 门，也不把相邻阶段结果冒充 D-354 新证据。
+
 - D-353/ADR-0445（已接受；`scheduled_system` 的 response-loss-safe 幂等准入待独立 Gate）：3.0 Shadow Run 不再只覆盖
   `manual/scheduled_node`。现有 `ScheduleService.runTask` 在既有 task limit 选中且 `onBefore` 成功后，可按默认关闭的
   `QL3_SHADOW_ORIGINS` 精确旁路观察 `subscription/system/script`；观察器只附着到 Legacy 已创建的同一个 ChildProcess，不调用
@@ -9055,7 +9070,7 @@ flowchart LR
 | PR-1 Run Schema | Incubating | Run/RunAttempt/RunEvent schema、nullable cancel request 与 Attempt deadline 字段及恢复索引、CancellationDispatch 状态/version/lease/backoff schema、Repository port、临时 Sequelize adapter、统一事件大小/分页上限、跨 adapter RunRepository contract suite（原子事务、回滚、Run/Attempt/RetryPolicy CAS、唯一错误、分页与取消恢复）；ADR-0041 的 `pg-0003-run-retry-policy`、capability v2、driver-neutral PostgreSQL Run Repository 与真实 `pg.Pool` 上的共享 Repository/rollback/SQLSTATE contract；ADR-0063/0069/0071/0073/0074/0076 的独立 Node 24 local-sqlite typed schema、十二条 reviewed migration、capability v6、共享 operation authority、readiness/RunRepository/API credential repository/receipt journal/dispatch plan/encrypted Secret envelope/Project Policy/security audit/authorized mutation/stable Identity catalog、Drizzle↔真实 catalog table/column/index/CHECK/FK lockstep、base/adopted/application edge/standalone 产物门禁；ADR-0064 的 legacy baseline/plan digest、Online Backup recovery、side-by-side target migration、staged manifest、双库栅栏 activation、source 生命周期写栅栏、target stable identity 和重启语义；ADR-0065 的独立 cutover authority、外部副作用停机 evidence、append-only journal、start/restart/stop barrier 与 unknown→manual_required 收敛；ADR-0066 的 adopted storage→Run reconciliation→receipt maintenance→domain recovery→lifecycle→admission application gate、严格有界 recovery summary 与 admission-first reverse stop；ADR-0067 的 SQLite 事实驱动 Run 候选源、256 条硬上限、截断失败关闭和唯一 Repository authority；ADR-0068 的 receipt-first Reconciler、callback token/sequence fence、exact local-process identity、Attempt/Run/双 Event 原子终态推进和最终 verifier；ADR-0069 的 local-process 单向包边界、pre-spawn journal、受审 POSIX launcher、immutable receipt、exact identity 和 Profile-aware cleanup lifecycle；ADR-0070 的独立 local-execution、spawn 前后双 transaction CAS、callback digest、exact stop 补偿与 fail-closed starting 保留；ADR-0071 的独立 local-dispatch、不可变 revision/context、Secret-first materializer、Profile Artifact admission、4/64 MiB output hard quota 和窄 application facade；ADR-0073/0074 的 Project-bound SecretRef、AES-256-GCM、外置 keyring 生命周期、双 SQLite authority CAS、application preflight、强 Principal/Policy 和 envelope+audit 原子提交；ADR-0086 的本机 Owner provisioning/challenge/claim/delivery acknowledgement/credential recovery CLI；ADR-0377 的 Local/Cluster 同构、Profile-aware、Project-scoped Artifact range read | fresh database/pepper setup、credential rotation/GC 运维编排与 Secret/Project/Role/Approval 管理 CLI/API/UI、备份/rekey、2.x/target process controller、人工 recovery、target 写后 reconciliation 与完整 cutover/rollback 演练；retry 产品策略、Artifact retention/tombstone stack、具体本机 lifecycle 和 target executable；Linux x64/arm64、PID namespace、断电与固定路由设备门禁；PostgreSQL 16/18 双连接并发与 failover integration；Task revision/context 跨方言 contract/并发压力与引用感知 retention、Keyv 数据迁移 |
 | PR-2 Run 状态机 | Incubating | 纯转换表、终态/时间/错误/执行器元数据规则、Run version 与 event sequence CAS、事务性 RunCommandService、回滚测试 | 重复 Worker callback/fencing、并发数据库压力测试、Primary 执行链接入 |
 | PR-3 Executor 端口 | Incubating | ADR-0003、ExecutionSpec/Context/Handle/Result、Executor port、LocalProcessExecutor、进程组取消/超时升级、流式背压、Legacy Cron spec builder、真实进程 contract tests、可复现 edge 基准入口 | 固定 edge/多架构设备基线、Legacy builder 与 makeCommand 差异审计、Primary 生产流量接入 |
-| PR-4 Shadow Run | Incubating | origin 三态策略；默认关闭的 `QL3_SHADOW_ORIGINS`；manual、scheduled_node、subscription、system 与 script 现有 ChildProcess 旁路观察；每个 worker 懒加载；Run/Attempt/Event 影子生命周期；稳定且不复制 caller 原文的 task identity/revision 与有界日志引用；同 worker 有界注册表和跨 worker 持久化候选关联；stop all/stop instance、Shell callback、乱序/迟到/歧义处理；失败开放和契约测试 | system crond `scheduled_system` 的 response-loss-safe accept identity/幂等准入；once/boot/grpc 独立裁决；启动后 Reconciler、差异报表、可采集指标、资源压力、回滚演练和 Primary 门禁 |
+| PR-4 Shadow Run | Incubating | origin 三态策略；默认关闭的 `QL3_SHADOW_ORIGINS`；manual、scheduled_node、subscription、system 与 script 现有 ChildProcess 旁路观察；system crond 显式 origin marker、Shell execution ID、finish-only 准入、确定性 Run/Attempt 与 exact replay；每个 worker 懒加载；Run/Attempt/Event 影子生命周期；稳定且不复制 caller 原文的 task identity/revision 与有界日志引用；同 worker 有界注册表和跨 worker 持久化候选关联；stop all/stop instance、Shell callback、乱序/迟到/歧义处理；失败开放和契约测试 | once/boot/grpc 独立裁决；启动后 Reconciler、差异报表、可采集指标、资源压力、回滚演练和 Primary 门禁 |
 | PR-5 Primary LocalExecutor | Incubating（默认不激活，仅 manifest-gated manual） | runtime-owned Run 创建器；持久化先于 spawn；Run/Attempt 完整成功、失败、取消、超时与 lost 闭环；Executor handle 身份校验；spawn 后激活写失败的 stop+lost 补偿；completion rejection 安全收敛；独立 Primary 幂等查询与唯一索引竞态裁决；durable `run.cancel_requested`、stop-before-signal、首次请求幂等、晚到完成裁决与待取消有界恢复查询；最多 64 条一页的 cross-worker cancellation source；独立 CancellationDispatch Repository 原子 claim/result、lease expiry 接管、owner/token/version fencing、指数退避与结果 RunEvent；最多 64 页的单周期 cancel supervisor；显式 start/stop、无重叠、错误隔离、停止等待有上限且 timer unref 的 lifecycle runner；Linux durable handle 的 PID/boot/start ticks/process-group 复验与 TERM/KILL controller；完整有界分页且 fail-closed 的 startup Reconcile supervisor；RunningInstance nullable `run_id/attempt_id` 关联；Primary 专用组合 Repository 在同一 SQLite 事务提交前投影 Crontab/RunningInstance，失败整体回滚；有界且防穿越的 legacy log output ref；manual owner seam、真实本机装配、单 spawn/fail-closed；严格 manual-only rollout manifest loader、短期审批/gate、配置哈希审计；HTTP worker 已接轻量 lazy bootstrap，accepted 后按 receipt-first reconcile→completion receipt lifecycle→timeout intent lifecycle→cancel dispatch lifecycle→router 顺序激活，失败撤销，监听失败和 shutdown 有界停止；Primary timeout 在 spawn 前持久化绝对 deadline，有界 source/requester/supervisor 只提交 timeout 意图并复用 CancellationDispatch；代码级 edge/standalone Profile 为各 lifecycle 提供不同 cadence 与页上限，cluster-control/worker 拒绝误装本机 SQLite Primary；统一 CompletionService 原子提交 Attempt/Run/双 Event，spawn 前保存 callback token hash、终态推进 sequence，实时回调与 receipt consumer 共享入口并覆盖两个清理 crash window；manual Primary 已接入受限 POSIX launcher、`0600` direct-file stdout/stderr、父进程退出后续写、不可覆盖 receipt 生产、回执环境清除、TERM 转发等待及 live transaction 后清理；Startup Reconciler receipt-first 双检查并在确定 exited 后执行 profile 化的单次 50/100 ms publish grace；`0007` 独立 CompletionReceiptJournal 在 spawn 前登记、为升级前 active Attempt 补登记并驱动周期扫描，使终态残留继续可发现；确定无效的已知 Attempt receipt 先持久化隔离状态，再进入确定性私有分片 quarantine；终态 missing 与 quarantine 按 edge/standalone retention 有界清理；非 Journal 文件具备只读优先、固定分片/条目上限、overflow fail-closed、显式同盘隔离的 Node 24 运维 CLI；扫描具备页上限、resume cursor、timer unref、无重叠、有界 stop 和低敏计数；ENOSPC 与 launcher receipt 存储失败有代码门禁 | 部署配置写入/审批入口与用户可见状态；PostgreSQL CancellationDispatch adapter；cluster-control 生产启动拓扑；固定 edge/Linux 多架构与真实磁盘压力基线、完整 2.x API 契约和回滚演练 |
 | PR-7 Worker Session、Run Lease 与启动协议基础 | Incubating（默认关闭，独立入口显式 opt-in） | ADR-0012/0013/0014/0021/0057–0061/0108–0121/0231–0239/0377；有界 capability/Placement/Dispatcher；SQLite 协议孵化与 PostgreSQL v9 Session/Run Lease/credential/attestation authority；immutable revision Placement、数据库时钟 keyset candidate、认证 Worker Pull、digest-only offer recovery；versioned capability-free ExecutionSpec response、stable claim 跨重启退避、单 owner 原子 inbox 准入与 TLS 1.3 mTLS/`ql3w` HTTPS client；同一 package journal 上 revision-fenced starting/spawn/started/running/completion 状态、callback digest、tagged no-spawn 与 ambiguous recovery；PostgreSQL starting/running/start-failure/completion 数据库权威事务、精确重放与 cancellation/timeout 优先终态；batch Secret delivery 在 Attempt advisory lock 下复验 Session/Lease/revision 完整围栏并复用单 Agent，Secret-before-Artifact materializer 将同一 log ID 交给 Executor/journal/running ACK；offer-scoped `wlog-*` 私有文件 spool、Edge/Node 容量策略、append/quota/path 防护、barrier 后 output ownership、受审 POSIX Executor、truncation fact、固定内存流式 source、认证 Artifact stream、共享 immutable store port、S3-compatible SSE/checksum/条件 promotion adapter、upload-before-completion 协调，以及 Local/Cluster 同构、Profile-aware、ETag-fenced range read；用户取消 run.stop mutation 以数据库时间写 intent/Event 并在事务内复验 Project/RoleBinding fence；非执行取消 convergence lifecycle、运行期 expiry 与安全 lost retry 已接入 cluster-control 单一全局 cadence；完整 generation/version/token/Attempt fencing；独立最小权限 Worker ingress、CA/CRL 与连接 generation 热重载；offer journal、spawn barrier、receipt-first recovery；独立 `@qinglong/worker-runtime` 的本地 P-256 CSR、key/chain/trust 验证、generation + active pointer 安装和持久退避；默认关闭的 production process 已装配具体 execution graph、完整 Session heartbeat/drain/offline、direct-file bootstrap、单 Agent/单 cadence、startup reconciliation、证书 maintenance、transport fail-close/recovery 与 Edge/Node 有界预算；真实 PostgreSQL 18 + Linux Node 合约已覆盖 Run completion、credential 和 CA 双轮换且保持同一 Session；真实 K3s 合约已覆盖 TLS/credential Secret 分权、双对象 CAS、Recreate 顺序、identity generation 与单节点 PVC recovery；所有能力默认不可达且受 edge/cluster import audit 约束 | 具体 cert-manager/Vault/SPIFFE/离线 CA adapter 与模板、ingress reload controller、生产 RBAC、证书到期告警和 `ql3w` credential recovery 产品面；具体 KMS/Vault Secret provider、对象存储 credential/temporary lifecycle 与 retention/tombstone；Worker 管理 API；真实 Kubernetes 多节点 CSI/node-loss/production 360 秒 drain 与固定 edge 文件系统 suspend/时钟/断电、x64/arm64 资源门禁 |
 | PR-8 Project/Policy/Approval Core | Incubating（默认拒绝、无生产业务执行入口） | ADR-0028；统一六类 ActorRef 与 exact-shape 校验；`0017` ownerless default Project 和 append-only versioned RoleBinding；owner/admin/operator/viewer 固定矩阵；Project 内 mutation 幂等、expected-version CAS、双 SQLite 连接竞争门禁；archived read-only、revocation、存储损坏 fail-closed；Agent 写/Secret/Tool `require_approval`；ADR-0047 把六类 subject、role/permission matrix 与 fence 抽到 runtime-core，`pg-0004-project-policy`/capability v3 建立 ownerless PostgreSQL baseline、严格 role/state CHECK、append-only runtime 权限、SERIALIZABLE Project lock、mutation replay、双连接单 winner 和 cluster admission authorizer；ADR-0049/`pg-0005` capability v4 建立 stable IdentitySubject、append-only digest-only API credential、真实 cluster bearer authenticator、write-only durable security audit 与最小权限 runtime role，且已验证 HTTP→credential→Policy→audit→handler 纵向链路；ADR-0051 建立 `/api/v3` 认证前 peer/global 双预算、transport-peer-only、无 timer 且有界内存的 overload shield；ADR-0027 Artifact authorizer adapter；ADR-0029 `AuthenticatedPrincipal` contract、`0018` digest-only versioned challenge、CSPRNG/TTL、同事务消费 challenge + 写首 owner、精确重放与双连接竞争/崩溃回滚门禁；ADR-0030 `0019` stable identity/binding、legacy HS384 + current-session membership、logout/platform/revoke/disable、single-factor 与损坏 fail-closed 门禁；ADR-0031 `0020` digest-bound ApprovalRequest、User-only decision、Project/Role version fence、精确 expiry/重放/并发裁决及同事务 immutable dispatch；ADR-0032 `0021` execution backfill、三表原子 consume、稳定 due keyset、claim/renew/start/result fencing、pre-start takeover/post-start recovery-required、attempt budget、handler inspect/digest barrier 和 bounded dispatcher；ADR-0033/`0022` control/resolution backfill、start/renew/completion 原子联动、稳定 recovery keyset、双 resolver claim/takeover、finding/result 精确重放、自动/人工终结、迟到 completion 单 winner 和 evidence-only bounded reconciler；ADR-0034/`0023` 首个 `run.create` canonical plan、Run/Attempt/Event/receipt 同事务、幂等 collision fail-closed、renew/终态 fence、真实 SQLite handler 与 automatic evidence provider；ADR-0035/`0024` 独立 `approval.recover` 矩阵、稳定 User + 五分钟强认证、Project/RoleBinding fence、human resolution + authorization fact 原子提交、撤权竞态与回滚门禁；ADR-0036 recovery-first 单 timer lifecycle、edge/standalone 独立 cadence/页预算、跨周期 cursor、非重叠与有界 stop；ADR-0074 以新的 Node 24 SQLite v5 ownerless Project/RoleBinding/audit authority 和独立 local-secret-admin 提供强 Principal、`secret.manage`、撤权 fence、envelope+allowed audit 原子提交及不回显语义；ADR-0086 以可信 POSIX console 和 staged delivery 完成本机首 Owner 产品 ceremony | fresh database/pepper setup 与安全迁移向导；`shareStore`/Express 到 authentication core 的 production migration；credential rotation/revocation API、mTLS/Worker enrollment、恢复码；Project/Role/Approval/Secret 管理 CLI/API/UI、audit retention/query/export/alert、preview Artifact/digest/immutable plan builder、真实 MFA/hardware adapter、人工 recovery API/UI/独立 rate limit 与审计事件、handler/provider registry、lifecycle startup/shutdown/指标/admission gate；PostgreSQL action/receipt/provider/recovery-authorization 与 OPA adapter、缓存 version 失效；Tool/Package/Secret/Shell 各自的 handler/evidence contract；Secret/Run/Tool/Workflow waiting_approval 全入口装配；完整回滚演练 |
diff --git a/docs/adr/ADR-0002-legacy-crontab-compatibility-and-shadow-write.md b/docs/adr/ADR-0002-legacy-crontab-compatibility-and-shadow-write.md
index ec70387b..629ff937 100644
--- a/docs/adr/ADR-0002-legacy-crontab-compatibility-and-shadow-write.md
+++ b/docs/adr/ADR-0002-legacy-crontab-compatibility-and-shadow-write.md
@@ -5,7 +5,7 @@
 - 决策者：QingLong Maintainers
 - 关联 RFC：[QL-RFC-0001](../QINGLONG_3_0_ARCHITECTURE_RFC.md)
 - 前置决策：[ADR-0001](./ADR-0001-run-state-and-transaction-boundaries.md)
-- Amended by：[ADR-0445](./ADR-0445-schedule-service-origin-shadow-run-coverage.md)
+- Amended by：[ADR-0445](./ADR-0445-schedule-service-origin-shadow-run-coverage.md)、[ADR-0446](./ADR-0446-system-crond-stable-shadow-admission.md)
 
 ## 1. 决策摘要
 
@@ -145,15 +145,16 @@ owner 在接受触发时写入执行上下文，并贯穿日志、指标和回
 
 当前孵化实现只开放观察型 Shadow，不通过该环境变量提供 primary：
 
-    QL3_SHADOW_ORIGINS=manual,scheduled_node,subscription,system,script
+    QL3_SHADOW_ORIGINS=manual,scheduled_node,scheduled_system,subscription,system,script
 
 - 未设置或设置为空时全部为 off。
-- ADR-0445 后当前只接受 `manual`、`scheduled_node`、`subscription`、`system` 与 `script`；未知 origin 被忽略并记录有界配置告警，
-  `scheduled_system`、`once`、`boot` 与 `grpc` 仍不开放。
+- ADR-0446 后当前接受 `manual`、`scheduled_node`、`scheduled_system`、`subscription`、`system` 与 `script`；未知 origin 被忽略并记录
+  有界配置告警，`once`、`boot` 与 `grpc` 仍不开放。
 - 配置在进程内首次使用时读取；edge 不启动 watcher，变更后需要通过既有进程重启或未来的显式 reload 生效。
 - 兼容观察器在实际 HTTP/gRPC worker 中按需加载；关闭时不构造 Shadow 事实或任务摘要、不增加 ChildProcess 监听器、不初始化 Repository、不创建后台任务，也不引入额外数据库写入。
-- 所有已开放 origin 都只监听 Legacy 已创建的同一个 ChildProcess。Shadow 代码不得调用 Executor 或第二次 spawn；
-  `subscription/system/script` 仅在 `ScheduleService` 已选中执行且 `onBefore` 成功后 accepted。
+- `manual/scheduled_node/subscription/system/script` 只监听 Legacy 已创建的同一个 ChildProcess。`scheduled_system` 不持有 Node ChildProcess，
+  只接受 system crond 显式标记后由 Shell start/finish 共用的稳定 execution ID；finish-only 回调可以幂等补齐 accepted→terminal 聚合。Shadow
+  代码不得调用 Executor 或第二次 spawn；`subscription/system/script` 仅在 `ScheduleService` 已选中执行且 `onBefore` 成功后 accepted。
 - 任意初始化、接受或后续写入失败都退化为 no-op，只记录不含命令、环境变量和 Secret 的稳定错误类型与有界计数。
 - `boot` 虽复用 `runSingle`，仍携带独立 origin，当前不在允许列表中，不能被误记为 manual。
 
diff --git a/docs/adr/ADR-0445-schedule-service-origin-shadow-run-coverage.md b/docs/adr/ADR-0445-schedule-service-origin-shadow-run-coverage.md
index 45856c3e..37297bdd 100644
--- a/docs/adr/ADR-0445-schedule-service-origin-shadow-run-coverage.md
+++ b/docs/adr/ADR-0445-schedule-service-origin-shadow-run-coverage.md
@@ -5,6 +5,7 @@
 - 关联 RFC：QL-RFC-0001 D-02、D-353、PR-4
 - 关联 ADR：ADR-0001、ADR-0002、ADR-0003
 - Amends：ADR-0002 的当前 Alpha Shadow origin allowlist，不改变 Legacy owner 或 Primary 门禁
+- Follow-up：[ADR-0446](./ADR-0446-system-crond-stable-shadow-admission.md) 已完成本文保留的 `scheduled_system` 稳定准入 Gate
 
 ## 上下文
 
diff --git a/docs/adr/ADR-0446-system-crond-stable-shadow-admission.md b/docs/adr/ADR-0446-system-crond-stable-shadow-admission.md
new file mode 100644
index 00000000..f3252574
--- /dev/null
+++ b/docs/adr/ADR-0446-system-crond-stable-shadow-admission.md
@@ -0,0 +1,81 @@
+# ADR-0446：System Crond 稳定 Shadow 准入与回调重放
+
+- 状态：Accepted
+- 日期：2026-08-18
+- 关联 RFC：QL-RFC-0001 D-02、D-354、PR-4
+- 关联 ADR：ADR-0001、ADR-0002、ADR-0445
+- Amends：ADR-0002 的 Alpha Shadow origin allowlist 与 system crond callback 关联规则
+
+## 上下文
+
+system crond 不由 Node worker spawn。它执行 `crontab.list` 中的 Shell 命令，`task.sh/share.sh` 再分别向
+`/open/crons/status` 发送 running 与 idle callback。旧 callback 只有 Cron ID、PID、log path 和秒级开始时间：running callback 丢失时，finish
+无法证明 accepted identity；重复、乱序或 HTTP response loss 又可能把同一次执行创建为多个 Shadow Run。因此 D-353 明确拒绝从结束事实直接伪造
+`scheduled_system` Run。
+
+这条边界还必须区分 Node scheduler 和面板手动执行。三者最终都可能进入同一 Shell 脚本；仅凭 `ID`、PID 或 `real_log_path` 猜测来源会把同一次手动
+执行同时记为 `manual` 与 `scheduled_system`。
+
+## 决策
+
+1. 只有 `CronService.setCrontab` 在实际 system scheduler 模式写出的命令增加
+   `QL_EXECUTION_ORIGIN=scheduled_system`。Node scheduler 注册命令、manual/boot `runSingle` 和直接 Shell 调用不带该标记。
+2. Shell 仅在标记存在时生成一次 `legacy-system:<start-seconds>:<uuid-v4>` execution ID，并在 start/finish callback 复用。UUID 优先读取 Linux
+   kernel random UUID，其次使用 `uuidgen`，最后使用已存在的 Node runtime；三者都不可用或输出非法时不发送 ID，Legacy 执行仍继续且不创建
+   `scheduled_system` Shadow Run。
+3. `/open/crons/status` 只接受严格小写 UUIDv4 和正整数秒时间的可选 `execution_id`。旧客户端没有该字段时继续走原 Cron ID/PID/log correlation，
+   不改变 2.x 请求兼容性。
+4. 带稳定 ID 的 callback 使用专用 detached observation，不注册虚构 ChildProcess，也不进入易歧义的本机 registry。running 映射为
+   accepted→spawned→running；finish 映射为 accepted→spawned→exited，因此 start request/response 丢失后，finish-only 仍能形成完整的终态聚合。
+5. Shadow Run 固定 `executionOwner=legacy`、origin/trigger type `scheduled_system`、`triggeredBy=legacy:system-crond`、Project `default` 和
+   `legacy-cron:<id>` task identity。accepted/scheduled 时间从 execution ID 内的开始秒派生，task revision 摘要与 manual/node Cron 使用相同字段集合。
+6. 带 request ID 的 `LegacyShadowRunWriter` 使用 request ID 和 accepted time 派生稳定 UUIDv7 形态的 Run/Attempt ID，并写既有
+   `(project_id,idempotency_key)` 唯一键。重放只有在 Run、Attempt、task revision、Cron ID、origin、request ID 与创建时间全部一致时才复用；任一
+   漂移都失败开放，不创建第二个 Run，也不改 Legacy callback 结果。
+7. `QL3_SHADOW_ORIGINS` 增加 `scheduled_system`，但默认仍为 off；本决定不开放 Primary，不调用 Executor，不增加网络重试、timer、watcher 或后台
+   reconciler。
+
+## Response-loss 与乱序语义
+
+- start 成功且 response 丢失：finish 使用同一 execution ID，复用既有 Run 并终结。
+- start request 未到达：finish-only 创建同一确定性 Run/Attempt 后直接终结。
+- finish 成功且 response 丢失后重放：唯一键和确定性 ID 命中 exact replay，终态与 Event 数不增加。
+- finish 先于迟到 start：迟到 start 命中已终态聚合，writer 的幂等状态推进保持终态不变。
+- 相同 ID 携带不同任务定义：exact replay 校验失败，Shadow 记录有界 accept failure；Legacy 状态更新与任务结果不受影响。
+- 无 ID、ID 非法或来源未显式标记：不创建 `scheduled_system` Run；无 ID 的既有 callback correlation 保持原行为。
+
+## 部署与资源影响
+
+- 不新增 workspace package、生产依赖、schema、migration、表、索引、端口、Kubernetes object 或常驻进程。
+- 复用 Run 表既有 idempotency unique index；SQLite 与 PostgreSQL Repository contract 不变。
+- 默认关闭时后端只多一次缓存 Set 查询；system crond 命令仍可执行，Shell 只在显式标记下读取一个 UUID。
+- Edge/路由设备优先读取 `/proc/sys/kernel/random/uuid`，不额外启动 Node；只有缺少 kernel UUID 与 `uuidgen` 时才使用已有 Node runtime 作为
+  兼容 fallback。
+- 不增加 callback retry，避免低配设备网络阻塞扩大；本决定保证重放安全和 finish-only 收敛，不把“最终一定送达”伪装成已解决问题。
+
+## 被拒绝的替代方案
+
+### 继续使用 Cron ID、PID 与 log path
+
+拒绝。它们在并发、PID 复用、`/dev/null` 日志和进程重启后都不能证明一次 execution identity。
+
+### 每个 callback 在后端生成新 ID
+
+拒绝。start/finish 以及 response-loss 重放会产生不同 Run，无法幂等收敛。
+
+### 为 Shell callback 注册虚构 ChildProcess
+
+拒绝。Node 不拥有 system crond 子进程；伪造 handle 会污染取消、恢复和 owner 语义。
+
+### 默认启用 scheduled_system Shadow
+
+拒绝。低写入寿命设备必须显式选择迁移观测成本，且 Primary 与对账门仍未完成。
+
+## 验证
+
+- Shell contract 覆盖显式 origin 才生成 ID、UUID 格式和 callback JSON 原样复用；
+- SQLite 集成覆盖 running→finish、start response-loss replay、finish-only、重复终态和 task revision drift；
+- Bridge/registry/correlation/ChildProcess/ScheduleService/rollout 聚焦回归 38/38 通过，包含真实隔离 crontab 文件写入与 system/node 模式差异；
+- `build:back`、4 个 Shell 文件语法检查与完整 backend 回归通过（1,415 pass、2 条条件 skip、0 fail）；
+- 18-package clean build/test 退出 0，14/14 静态审计与 14/14 artifact 档位均 compatible，artifact 字节与 D-353 相同；
+- 物理 PostgreSQL HA/K3s 只在数据库或部署面变化时重跑，本决定不以相邻阶段证据冒充新运行。
diff --git a/docs/adr/README.md b/docs/adr/README.md
index f5016c1f..ce1200aa 100644
--- a/docs/adr/README.md
+++ b/docs/adr/README.md
@@ -448,7 +448,8 @@
 | [ADR-0442](./ADR-0442-catalog-ready-terminal-release-tag-publication.md)                                | Catalog-ready 的终态 Release Tag 发布与闭合收据                                                                                                                             | Superseded by ADR-0443（bounded promotion/closure 机制保留） |
 | [ADR-0443](./ADR-0443-deployment-ready-terminal-release-finalization.md)                                | Deployment-ready 的终态 Release Finalization                                                                                                                               | Accepted（首份真实 GHCR deployment-ready finalization 待实际 release tag） |
 | [ADR-0444](./ADR-0444-fail-closed-release-tag-finalizer-and-replay-rehearsal.md)                         | Fail-closed Release Tag Finalizer 与重放演练                                                                                                                                | Accepted（首份真实 GHCR response-loss 重放待实际 release tag） |
-| [ADR-0445](./ADR-0445-schedule-service-origin-shadow-run-coverage.md)                                    | ScheduleService 执行来源的 Shadow Run 覆盖                                                                                                                                  | Accepted（`scheduled_system` 幂等准入待独立 Gate） |
+| [ADR-0445](./ADR-0445-schedule-service-origin-shadow-run-coverage.md)                                    | ScheduleService 执行来源的 Shadow Run 覆盖                                                                                                                                  | Accepted（`scheduled_system` 后续由 ADR-0446 完成） |
+| [ADR-0446](./ADR-0446-system-crond-stable-shadow-admission.md)                                            | System Crond 稳定 Shadow 准入与回调重放                                                                                                                                      | Accepted |
 
 ## 规则
 
diff --git a/shell/api.sh b/shell/api.sh
index 59f3b5f9..8cfd0bff 100755
--- a/shell/api.sh
+++ b/shell/api.sh
@@ -142,11 +142,15 @@ update_cron() {
   local lastExecutingTime="${5:-0}"
   local runningTime="${6:-0}"
   local exitCode="${7:-}"
+  local executionId="${8:-}"
   local currentTimeStamp=$(date +%s)
   local dataRaw="{\"ids\":[$ids],\"status\":\"$status\",\"pid\":\"$pid\",\"log_path\":\"$logPath\",\"last_execution_time\":$lastExecutingTime,\"last_running_time\":$runningTime"
   if [[ -n $exitCode ]]; then
     dataRaw="${dataRaw},\"exit_code\":$exitCode"
   fi
+  if [[ -n $executionId ]]; then
+    dataRaw="${dataRaw},\"execution_id\":\"$executionId\""
+  fi
   dataRaw="${dataRaw}}"
   local api=$(
     curl -s --noproxy "*" "http://localhost:${ql_port}/open/crons/status?t=$currentTimeStamp" \
@@ -166,6 +170,27 @@ update_cron() {
   fi
 }
 
+create_legacy_system_execution_id() {
+  local startedAt="$1"
+  local uuid=""
+  if [[ "${QL_EXECUTION_ORIGIN:-}" != "scheduled_system" ]] ||
+    [[ ! "$startedAt" =~ ^[0-9]{1,13}$ ]]; then
+    return 0
+  fi
+  if [[ -r /proc/sys/kernel/random/uuid ]]; then
+    IFS= read -r uuid </proc/sys/kernel/random/uuid
+  elif command -v uuidgen >/dev/null 2>&1; then
+    uuid=$(uuidgen)
+  elif command -v node >/dev/null 2>&1; then
+    uuid=$(node -e "process.stdout.write(require('node:crypto').randomUUID())")
+  fi
+  uuid=$(printf '%s' "$uuid" | tr '[:upper:]' '[:lower:]')
+  if [[ ! "$uuid" =~ ^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$ ]]; then
+    return 0
+  fi
+  printf 'legacy-system:%s:%s' "$startedAt" "$uuid"
+}
+
 notify_api() {
   local title="$1"
   local content="$2"
diff --git a/shell/share.sh b/shell/share.sh
index f182e4b7..7bba3b5b 100755
--- a/shell/share.sh
+++ b/shell/share.sh
@@ -377,7 +377,7 @@ clear_env() {
 handle_task_start() {
   local error_message=""
   if [[ $ID ]]; then
-    local error=$(update_cron "\"$ID\"" "0" "$$" "$log_path" "$begin_timestamp")
+    local error=$(update_cron "\"$ID\"" "0" "$$" "$log_path" "$begin_timestamp" "" "" "$execution_id")
     if [[ $error ]]; then
       error_message=", 任务状态更新失败(${error})"
     fi
@@ -414,7 +414,7 @@ handle_task_end() {
   [[ "$diff_time" == 0 ]] && diff_time=1
 
   if [[ $ID ]]; then
-    local error=$(update_cron "\"$ID\"" "1" "$$" "$log_path" "$begin_timestamp" "$diff_time" "$exit_code")
+    local error=$(update_cron "\"$ID\"" "1" "$$" "$log_path" "$begin_timestamp" "$diff_time" "$exit_code" "$execution_id")
     if [[ $error ]]; then
       error_message=", 状态更新失败(${error})"
     fi
diff --git a/shell/task.sh b/shell/task.sh
index e18e18cb..a7c922aa 100755
--- a/shell/task.sh
+++ b/shell/task.sh
@@ -126,6 +126,7 @@ format_params() {
 init_begin_time() {
   begin_time=$(format_time "$time_format" "$time")
   begin_timestamp=$(format_timestamp "$time_format" "$time")
+  execution_id=$(create_legacy_system_execution_id "$begin_timestamp")
 }
 
 import_config "$@"
diff --git a/shell/update.sh b/shell/update.sh
index cdd6a6dc..8d52221a 100755
--- a/shell/update.sh
+++ b/shell/update.sh
@@ -488,6 +488,7 @@ main() {
   local time_format="%Y-%m-%d %H:%M:%S"
   local time=$(date "+$time_format")
   local begin_timestamp=$(format_timestamp "$time_format" "$time")
+  local execution_id=$(create_legacy_system_execution_id "$begin_timestamp")
 
   local begin_time=$(format_time "$time_format" "$time")
 
@@ -495,7 +496,7 @@ main() {
     eval echo -e "\#\# 开始执行... $begin_time\\\n" $cmd
   fi
 
-  [[ $ID ]] && update_cron "\"$ID\"" "0" "$$" "$log_path" "$begin_timestamp"
+  [[ $ID ]] && update_cron "\"$ID\"" "0" "$$" "$log_path" "$begin_timestamp" "" "" "$execution_id"
 
   case $p1 in
   update)
@@ -558,7 +559,7 @@ main() {
   local end_time=$(format_time "$time_format" "$etime")
   local end_timestamp=$(format_timestamp "$time_format" "$etime")
   local diff_time=$(($end_timestamp - $begin_timestamp))
-  [[ $ID ]] && update_cron "\"$ID\"" "1" "$$" "$log_path" "$begin_timestamp" "$diff_time"
+  [[ $ID ]] && update_cron "\"$ID\"" "1" "$$" "$log_path" "$begin_timestamp" "$diff_time" "" "$execution_id"
 
   if [[ "$p1" != "repo" ]] && [[ "$p1" != "raw" ]]; then
     eval echo -e "\\\n\#\# 执行结束... $end_time  耗时 $diff_time 秒　　　　　" $cmd
diff --git a/test/back/legacyScheduleServiceShadow.test.cjs b/test/back/legacyScheduleServiceShadow.test.cjs
index 4de80372..114a036f 100644
--- a/test/back/legacyScheduleServiceShadow.test.cjs
+++ b/test/back/legacyScheduleServiceShadow.test.cjs
@@ -45,7 +45,7 @@ function successfulCommand() {
   return `${JSON.stringify(process.execPath)} -e "process.exit(0)"`;
 }
 
-test('admits the three reviewed origins through the default environment boundary', () => {
+test('admits the reviewed schedule and system-crond origins through the environment boundary', () => {
   const source = `
     const bridge = require('./back/runtime/compatibility/legacyExecutionBridge');
     const fact = (origin) => ({
@@ -56,11 +56,11 @@ test('admits the three reviewed origins through the default environment boundary
       triggerType: origin,
       acceptedAtMs: 1,
     });
-    const result = ['subscription', 'system', 'script', 'boot'].map((origin) =>
+    const result = ['subscription', 'system', 'script', 'scheduled_system', 'boot'].map((origin) =>
       Boolean(bridge.observeLegacyExecution(origin, () => fact(origin))),
     );
     process.stdout.write(JSON.stringify(result));
-    process.exit(result.join(',') === 'true,true,true,false' ? 0 : 1);
+    process.exit(result.join(',') === 'true,true,true,true,false' ? 0 : 1);
   `;
   const child = spawnSync(
     process.execPath,
@@ -69,7 +69,7 @@ test('admits the three reviewed origins through the default environment boundary
       cwd: path.resolve(__dirname, '../..'),
       env: {
         ...process.env,
-        QL3_SHADOW_ORIGINS: 'subscription,system,script',
+        QL3_SHADOW_ORIGINS: 'subscription,system,script,scheduled_system',
       },
       encoding: 'utf8',
       timeout: 10_000,
@@ -77,7 +77,7 @@ test('admits the three reviewed origins through the default environment boundary
   );
 
   assert.equal(child.status, 0, child.stderr);
-  assert.equal(child.stdout, '[true,true,true,false]');
+  assert.equal(child.stdout, '[true,true,true,true,false]');
 });
 
 test('observes subscription, system and script children without replacing legacy execution', async () => {
diff --git a/test/back/legacyScheduledSystemExecution.test.cjs b/test/back/legacyScheduledSystemExecution.test.cjs
new file mode 100644
index 00000000..577e1303
--- /dev/null
+++ b/test/back/legacyScheduledSystemExecution.test.cjs
@@ -0,0 +1,384 @@
+require('ts-node/register/transpile-only');
+
+const assert = require('node:assert/strict');
+const fs = require('node:fs/promises');
+const os = require('node:os');
+const path = require('node:path');
+const { spawnSync } = require('node:child_process');
+const { test } = require('node:test');
+const { Sequelize } = require('sequelize');
+const config = require('../../back/config').default;
+const { CrontabModel } = require('../../back/data/cron');
+const {
+  defineSchemaMigrationModel,
+} = require('../../back/data/schemaMigration');
+const CronService = require('../../back/services/cron').default;
+const { runSchemaMigration } = require('../../back/migrations/0002-run-schema');
+const {
+  runCancellationRequestMigration,
+} = require('../../back/migrations/0004-run-cancellation-request');
+const {
+  runAttemptDeadlineMigration,
+} = require('../../back/migrations/0006-run-attempt-deadline');
+const { runMigrations } = require('../../back/migrations/runner');
+const {
+  LegacySequelizeRunRepository,
+} = require('../../back/runtime/adapters/legacy-sequelize/runRepository');
+const {
+  LegacyShadowRunObserver,
+} = require('../../back/runtime/application/legacyShadowRunObserver');
+const {
+  LegacyShadowRunWriter,
+} = require('../../back/runtime/application/legacyShadowRunWriter');
+const {
+  installLegacyExecutionObserver,
+} = require('../../back/runtime/compatibility/legacyExecutionBridge');
+const {
+  decorateScheduledSystemCronCommand,
+  observeLegacyScheduledSystemExecution,
+  parseLegacyScheduledSystemExecutionId,
+} = require('../../back/runtime/compatibility/legacyScheduledSystemExecution');
+const {
+  shadowOnlyRollout,
+} = require('../../back/runtime/domain/runtimeRollout');
+
+const EXECUTION_ID =
+  'legacy-system:1787004000:123e4567-e89b-42d3-a456-426614174000';
+const SECOND_EXECUTION_ID =
+  'legacy-system:1787004060:123e4567-e89b-42d3-b456-426614174001';
+
+function cron(overrides = {}) {
+  return {
+    id: 37,
+    name: 'system scheduled task',
+    command: 'task scripts/job.js',
+    schedule: '*/5 * * * *',
+    extra_schedules: [],
+    ...overrides,
+  };
+}
+
+async function databaseFixture() {
+  const database = new Sequelize({
+    dialect: 'sqlite',
+    storage: ':memory:',
+    logging: false,
+  });
+  await runMigrations({
+    database,
+    migrationModel: defineSchemaMigrationModel(database),
+    migrations: [
+      runSchemaMigration,
+      runCancellationRequestMigration,
+      runAttemptDeadlineMigration,
+    ],
+    logger: { info() {} },
+  });
+  return database;
+}
+
+async function runRows(database) {
+  const [rows] = await database.query(
+    'SELECT id FROM "Runs" ORDER BY created_at_ms, id',
+  );
+  return rows;
+}
+
+function logger() {
+  return { info() {}, warn() {}, error() {} };
+}
+
+test('marks only system-crond commands and parses one bounded execution identity', () => {
+  const command = 'real_time=false no_tee=true ID=37 task scripts/job.js';
+  assert.equal(
+    decorateScheduledSystemCronCommand(command, true),
+    `QL_EXECUTION_ORIGIN=scheduled_system ${command}`,
+  );
+  assert.equal(decorateScheduledSystemCronCommand(command, false), command);
+  assert.deepEqual(parseLegacyScheduledSystemExecutionId(EXECUTION_ID), {
+    requestId: EXECUTION_ID,
+    acceptedAtMs: 1_787_004_000_000,
+  });
+  for (const invalid of [
+    '',
+    'legacy-system:0:123e4567-e89b-42d3-a456-426614174000',
+    'legacy-system:1787004000:123e4567-e89b-12d3-a456-426614174000',
+    'manual:1787004000:123e4567-e89b-42d3-a456-426614174000',
+  ]) {
+    assert.equal(parseLegacyScheduledSystemExecutionId(invalid), undefined);
+  }
+});
+
+test('Shell creates the identity only for an explicitly marked system execution', () => {
+  const script = `
+    . ./shell/api.sh
+    first=$(create_legacy_system_execution_id 1787004000)
+    QL_EXECUTION_ORIGIN=scheduled_system
+    second=$(create_legacy_system_execution_id 1787004000)
+    printf '%s\\n%s' "$first" "$second"
+  `;
+  const child = spawnSync('bash', ['-c', script], {
+    cwd: path.resolve(__dirname, '../..'),
+    encoding: 'utf8',
+    timeout: 10_000,
+  });
+  assert.equal(child.status, 0, child.stderr);
+  const [unmarked, marked] = child.stdout.split('\n');
+  assert.equal(unmarked, '');
+  assert.match(
+    marked,
+    /^legacy-system:1787004000:[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/u,
+  );
+});
+
+test('Shell sends the same execution identity as bounded callback JSON', async () => {
+  const temporary = await fs.mkdtemp(
+    path.join(os.tmpdir(), 'ql3-system-callback-'),
+  );
+  const capture = path.join(temporary, 'curl-arguments');
+  const script = `
+    . ./shell/api.sh
+    curl() {
+      printf '%s\\n' "$@" > "$CALLBACK_CAPTURE"
+      printf '{"code":200}'
+    }
+    jq() {
+      if [[ "$*" == *'.code'* ]]; then printf '200'; fi
+    }
+    update_cron '"37"' '0' '4321' 'task/run.log' '1787004000' '' '' "$EXECUTION_ID"
+  `;
+  try {
+    const child = spawnSync('bash', ['-c', script], {
+      cwd: path.resolve(__dirname, '../..'),
+      env: {
+        ...process.env,
+        CALLBACK_CAPTURE: capture,
+        EXECUTION_ID,
+      },
+      encoding: 'utf8',
+      timeout: 10_000,
+    });
+    assert.equal(child.status, 0, child.stderr);
+    const args = (await fs.readFile(capture, 'utf8')).split('\n');
+    const dataIndex = args.indexOf('--data-raw');
+    assert.equal(dataIndex >= 0, true);
+    assert.deepEqual(JSON.parse(args[dataIndex + 1]), {
+      ids: ['37'],
+      status: '0',
+      pid: '4321',
+      log_path: 'task/run.log',
+      last_execution_time: 1_787_004_000,
+      last_running_time: 0,
+      execution_id: EXECUTION_ID,
+    });
+  } finally {
+    await fs.rm(temporary, { recursive: true, force: true });
+  }
+});
+
+test('CronService marks the real system crontab file but not the node scheduler file', async () => {
+  const temporary = await fs.mkdtemp(
+    path.join(os.tmpdir(), 'ql3-system-crontab-'),
+  );
+  const executableDirectory = path.join(temporary, 'bin');
+  const crontabExecutable = path.join(executableDirectory, 'crontab');
+  const capture = path.join(temporary, 'crontab-call');
+  const crontabFile = path.join(temporary, 'crontab.list');
+  const previous = {
+    crontabFile: config.crontabFile,
+    path: process.env.PATH,
+    scheduler: process.env.QL_SCHEDULER,
+    update: CrontabModel.update,
+  };
+  await fs.mkdir(executableDirectory);
+  await fs.writeFile(
+    crontabExecutable,
+    '#!/bin/sh\nprintf "%s" "$1" > "$CRONTAB_CAPTURE"\n',
+    { mode: 0o755 },
+  );
+  config.crontabFile = crontabFile;
+  process.env.PATH = `${executableDirectory}:${process.env.PATH ?? ''}`;
+  process.env.CRONTAB_CAPTURE = capture;
+  CrontabModel.update = async () => [0];
+  try {
+    const service = new CronService(logger());
+    process.env.QL_SCHEDULER = 'system';
+    await service.setCrontab({ data: [cron()], total: 1 });
+    const systemContent = await fs.readFile(crontabFile, 'utf8');
+    assert.match(
+      systemContent,
+      /^\*\/5 \* \* \* \* QL_EXECUTION_ORIGIN=scheduled_system /u,
+    );
+    assert.equal(await fs.readFile(capture, 'utf8'), crontabFile);
+
+    process.env.QL_SCHEDULER = 'node';
+    await service.setCrontab({ data: [cron()], total: 1 });
+    const nodeContent = await fs.readFile(crontabFile, 'utf8');
+    assert.equal(nodeContent.includes('QL_EXECUTION_ORIGIN='), false);
+  } finally {
+    config.crontabFile = previous.crontabFile;
+    process.env.PATH = previous.path;
+    CrontabModel.update = previous.update;
+    delete process.env.CRONTAB_CAPTURE;
+    if (previous.scheduler === undefined) {
+      delete process.env.QL_SCHEDULER;
+    } else {
+      process.env.QL_SCHEDULER = previous.scheduler;
+    }
+    await fs.rm(temporary, { recursive: true, force: true });
+  }
+});
+
+test('running, finish and response-loss replay converge to one durable aggregate', async () => {
+  const database = await databaseFixture();
+  const repository = new LegacySequelizeRunRepository(database);
+  const failures = [];
+  const observer = new LegacyShadowRunObserver(
+    shadowOnlyRollout(['scheduled_system']),
+    new LegacyShadowRunWriter(repository),
+    { failure: (failure) => failures.push(failure) },
+  );
+  const restore = installLegacyExecutionObserver(observer, [
+    'scheduled_system',
+  ]);
+  try {
+    const running = observeLegacyScheduledSystemExecution(cron(), {
+      executionId: EXECUTION_ID,
+      phase: 'running',
+      observedAtMs: 1_787_004_001_000,
+      pid: 4321,
+      logPath: 'task/run.log',
+    });
+    await running.settled();
+    const finished = observeLegacyScheduledSystemExecution(cron(), {
+      executionId: EXECUTION_ID,
+      phase: 'finished',
+      observedAtMs: 1_787_004_005_000,
+      pid: 4321,
+      logPath: 'task/run.log',
+      exitCode: 0,
+    });
+    await finished.settled();
+    const replay = observeLegacyScheduledSystemExecution(cron(), {
+      executionId: EXECUTION_ID,
+      phase: 'finished',
+      observedAtMs: 1_787_004_005_000,
+      pid: 4321,
+      logPath: 'task/run.log',
+      exitCode: 0,
+    });
+    await replay.settled();
+
+    const rows = await runRows(database);
+    assert.equal(rows.length, 1);
+    assert.match(
+      rows[0].id,
+      /^[0-9a-f]{8}-[0-9a-f]{4}-7[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/u,
+    );
+    const run = await repository.findRunById(rows[0].id);
+    const attempt = await repository.findLatestAttemptByRunId(rows[0].id);
+    const events = await repository.listEvents(rows[0].id);
+    assert.deepEqual(failures, []);
+    assert.equal(run.executionOrigin, 'scheduled_system');
+    assert.equal(run.executionOwner, 'legacy');
+    assert.equal(run.requestId, EXECUTION_ID);
+    assert.equal(
+      run.idempotencyKey,
+      `legacy-shadow:scheduled_system:${EXECUTION_ID}`,
+    );
+    assert.equal(run.createdAtMs, 1_787_004_000_000);
+    assert.equal(run.status, 'succeeded');
+    assert.equal(attempt.status, 'succeeded');
+    assert.equal(attempt.pid, 4321);
+    assert.equal(events.length, 8);
+    assert.deepEqual(
+      events.map((event) => event.sequence),
+      [1, 2, 3, 4, 5, 6, 7, 8],
+    );
+  } finally {
+    restore();
+    await database.close();
+  }
+});
+
+test('finish-only delivery creates one terminal Run and exact replay stays idempotent', async () => {
+  const database = await databaseFixture();
+  const repository = new LegacySequelizeRunRepository(database);
+  const failures = [];
+  const restore = installLegacyExecutionObserver(
+    new LegacyShadowRunObserver(
+      shadowOnlyRollout(['scheduled_system']),
+      new LegacyShadowRunWriter(repository),
+      { failure: (failure) => failures.push(failure) },
+    ),
+    ['scheduled_system'],
+  );
+  try {
+    for (let replay = 0; replay < 2; replay += 1) {
+      const observation = observeLegacyScheduledSystemExecution(cron(), {
+        executionId: SECOND_EXECUTION_ID,
+        phase: 'finished',
+        observedAtMs: 1_787_004_065_000,
+        pid: 4322,
+        exitCode: 17,
+      });
+      await observation.settled();
+    }
+    const rows = await runRows(database);
+    assert.equal(rows.length, 1);
+    const run = await repository.findRunById(rows[0].id);
+    const attempt = await repository.findLatestAttemptByRunId(rows[0].id);
+    assert.equal(run.status, 'failed');
+    assert.equal(attempt.status, 'failed');
+    assert.equal(attempt.exitCode, 17);
+    assert.deepEqual(failures, []);
+  } finally {
+    restore();
+    await database.close();
+  }
+});
+
+test('same execution identity with changed task facts fails open without a second Run', async () => {
+  const database = await databaseFixture();
+  const repository = new LegacySequelizeRunRepository(database);
+  const failures = [];
+  const restore = installLegacyExecutionObserver(
+    new LegacyShadowRunObserver(
+      shadowOnlyRollout(['scheduled_system']),
+      new LegacyShadowRunWriter(repository),
+      { failure: (failure) => failures.push(failure) },
+    ),
+    ['scheduled_system'],
+  );
+  try {
+    const first = observeLegacyScheduledSystemExecution(cron(), {
+      executionId: EXECUTION_ID,
+      phase: 'finished',
+      observedAtMs: 1_787_004_005_000,
+      exitCode: 0,
+    });
+    await first.settled();
+    const drifted = observeLegacyScheduledSystemExecution(
+      cron({ command: 'task scripts/changed.js' }),
+      {
+        executionId: EXECUTION_ID,
+        phase: 'finished',
+        observedAtMs: 1_787_004_005_000,
+        exitCode: 0,
+      },
+    );
+    await drifted.settled();
+    assert.equal((await runRows(database)).length, 1);
+    assert.equal(
+      failures.some(
+        (failure) =>
+          failure.origin === 'scheduled_system' &&
+          failure.operation === 'accept',
+      ),
+      true,
+    );
+  } finally {
+    restore();
+    await database.close();
+  }
+});