diff --git a/.github/workflows/ql3-ci.yml b/.github/workflows/ql3-ci.yml
index 1f601611..45af05c4 100644
--- a/.github/workflows/ql3-ci.yml
+++ b/.github/workflows/ql3-ci.yml
@@ -435,6 +435,21 @@ jobs:
         run: |
           node scripts/ql3-local-image-live-contract.cjs --image="${IMAGE}" --profile=edge
           node scripts/ql3-local-image-live-contract.cjs --image="${IMAGE}" --profile=standalone
+      - name: Run authenticated Local API cancellation through real Linux processes
+        env:
+          QL3_LOCAL_API_CANCELLATION_LIVE: '1'
+        run: |
+          install -d -m 0700 "${{ runner.temp }}/ql3-local-api-cancellation"
+          node scripts/ql3-local-api-cancellation-live-contract.cjs \
+            --profile=edge \
+            --report="${{ runner.temp }}/ql3-local-api-cancellation/edge.json"
+          node scripts/ql3-local-api-cancellation-live-contract.cjs \
+            --profile=standalone \
+            --report="${{ runner.temp }}/ql3-local-api-cancellation/standalone.json"
+          node scripts/ql3-local-api-cancellation-live-audit.cjs \
+            --report="${{ runner.temp }}/ql3-local-api-cancellation/edge.json"
+          node scripts/ql3-local-api-cancellation-live-audit.cjs \
+            --report="${{ runner.temp }}/ql3-local-api-cancellation/standalone.json"
 
   cluster-image:
     name: Cluster ${{ matrix.image }} image (${{ matrix.image_arch }})
diff --git a/docs/QINGLONG_3_0_ARCHITECTURE_RFC.md b/docs/QINGLONG_3_0_ARCHITECTURE_RFC.md
index 50d39fcf..8af5ff5e 100644
--- a/docs/QINGLONG_3_0_ARCHITECTURE_RFC.md
+++ b/docs/QINGLONG_3_0_ARCHITECTURE_RFC.md
@@ -11,6 +11,24 @@
 
 最新增量证据（2026-08-12）：
 
+- D-299/ADR-0387（已接受）
+  Local `run.cancel` 已从“HTTP durable intent 与 `/proc` stop 分别验证”推进为同一次真实 Linux 组合门。门先用既有离线 pack/prune
+  生成可选 `edge/standalone-application-api` 最终制品，再在锁定 Node 24 arm64 Linux 容器内以 non-root、read-only root、network none、
+  capabilities none、0.5 CPU、Edge 128 MiB/64 PIDs 或 Standalone 256 MiB/256 PIDs 运行单进程 Local API。真实 HTTP `task.start`
+  拉起长期子进程，SQLite 持久 PID 后由 `/proc/<pid>/stat` 绑定 start ticks；真实 HTTP cancellation 必须得到
+  `accepted → already_requested`，最终只有 1 条 intent Event、1 条 cancelled Event、2 条 allowed audit，Run/Attempt 均 cancelled，精确
+  PID/start identity 消失，SQLite integrity `ok`，API 有序重启后仍通过 HTTP 观察 cancelled。Edge/Standalone 可选 API 制品为
+  3,668,052/3,668,196 bytes、429 files、85 modules，距 6 MiB 保留 2,623,404/2,623,260 bytes；API RSS 为
+  80,736,256/78,868,480 bytes，低于对应 envelope。两份 `0600` 私有报告经独立 audit 零 finding，SHA-256 分别为
+  `056f8f1c07f0c5dfe4552fcb605d6b55b194cd826dbf1c720b21fdba4bd55e53` 与
+  `223b7241ec3af8edea824dd802f24d573d0987c2ec55fd82b380c95acdf46ba7`。报告固定声明
+  `linux_virtualized_live_contract/physicalDevice:false`，因此关闭自动化组合缝隙但不冒充固定型号路由器报告，ADR-0372 继续保持
+  Proposed。实现只增强 artifact auditor 的可选临时输出并新增 scripts/test/CI，不新增 package、生产依赖、migration、表、默认 listener、
+  timer、watcher、连接、cache 或 sidecar；默认 API-excluded Edge/Standalone 产品闭包不变。完整 backend 为 1,180 tests、1,178 pass/2
+  conditional skip/0 fail，完整 18-package clean build/test 退出 0；package/dependency/local-image boundary 全绿，仍无 single-source/shallow
+  package。14 个 Profile artifact 全部 compatible，最小 Edge 为 2,467,343 bytes/295 files/53 modules，最重 Standalone MCP 为
+  7,168,978 bytes/778 files/213 modules，RSS delta 38,158,336 bytes，均低于各自预算。PostgreSQL 18.4 arm64 HA 干净重跑通过 123 gates、
+  timeline `1→2`，报告 SHA-256 `4bf01be43b6eaa0bb6b2d5a2510e6a701c7d02a0fe4a0f246e207cc2c63dc003`。
 - D-298/ADR-0386（已接受）
   Cluster `run.retry | run.stop` 已建立人工触发的真实三节点 Kubernetes 组合门：1 control-plane + 2 worker K3s/Flannel、3 实例
   CloudNativePG 1.30.0/PostgreSQL 18.4、2 个跨节点 Run manager Pod、TLS 1.3 mTLS、purpose-bound OIDC strong User、identity
diff --git a/docs/adr/ADR-0372-two-phase-authenticated-local-run-cancellation-api.md b/docs/adr/ADR-0372-two-phase-authenticated-local-run-cancellation-api.md
index b1018b9d..1e1218a8 100644
--- a/docs/adr/ADR-0372-two-phase-authenticated-local-run-cancellation-api.md
+++ b/docs/adr/ADR-0372-two-phase-authenticated-local-run-cancellation-api.md
@@ -35,7 +35,7 @@ D-283 后，Local `/api/v3` 已能按 Project 读取 Run、列表、RunEvent 与
 - Runtime Core 覆盖 profile-neutral canonical schema、严格 body/result、compat export 与非法状态；
 - Local admission/transport 覆盖认证与持久审计早于 body、512-byte hard cap、content-type/content-length/UTF-8/JSON 严格性、GET 零 body parser；
 - SQLite repository 覆盖 accepted、response-loss replay、already-requested、already-terminal、跨 Project、Role revoke/version drift、counter overflow、Event collision、rollback 与 bounded authority queue；
-- 真实 SQLite HTTP 覆盖 Owner/Operator allow、Viewer deny、credential confirm、durable Run/Event、取消 lifecycle 收敛与重启后可观察状态；
+- 真实 SQLite HTTP 覆盖 Owner/Operator allow、Viewer deny、credential confirm、durable Run/Event、取消 lifecycle 收敛与重启后可观察状态；Linux 虚拟化组合门必须在同一进程链证明 API→intent→真实 PID stop，固定物理设备报告仍独立采集；
 - Cluster canonical schema、完整源码、制品、Local image 与 PostgreSQL HA 门全绿，且 MCP Tool 清单和默认 Edge/Standalone import closure 不获得写 authority。
 
 ## 当前验证证据
@@ -45,4 +45,4 @@ D-283 后，Local `/api/v3` 已能按 Project 读取 Run、列表、RunEvent 与
 - 14 个 Profile artifact 全部 compatible。默认 Edge/Standalone 仅包含 SQLite/Runtime Core/SemVer，为 3,694,042/3,694,096 bytes、375 files、50 loaded modules；API 组合为 5,113,425/5,113,569 bytes。最紧 Application+AI 为 6,281,428/6,281,560 bytes，距 6 MiB 只余 10,028/9,896 bytes，后续增量必须先恢复包内可达文件裁剪余量，不得提高 cap。
 - AI/API-excluded arm64 Local image 为 478 files/4,717,459 bytes；Edge 128 MiB/64 PIDs 与 Standalone 256 MiB/256 PIDs 均在只读根、无网络、非 root 条件下 active→graceful stop，SQLite integrity 为 `ok`。
 - PostgreSQL 18.4 arm64 HA 112/112 gates、timeline 1→2；私有报告 SHA-256 为 `8416a26aa6220210961a40e22aec897215a55e59423ad48638ca203a8cb488e6`，离线审计 `compatible=true/findings=[]`，Docker 资源零残留。
-- HTTP→SQLite durable intent/exact replay、重启前 cancellation intent 收敛，以及 Linux `/proc` 真实进程 stop 已由相邻集成门分别证明；固定型号低配路由器上的同一 API→进程 stop 链尚无物理报告，因此本 ADR 保持 Proposed。
+- D-299/ADR-0387 已把相邻证据收敛为同一真实 arm64 Linux 链：可选 `edge/standalone-application-api` 制品经 HTTP `task.start` 拉起真实子进程，再经 HTTP cancellation 写入唯一 durable intent/Event，exact replay 不重复，execution-control 收敛 `run/attempt=cancelled`，`/proc/<pid>` 的精确 start identity 消失，重启后仍可读 cancelled。Edge 128 MiB/64 PIDs 与 Standalone 256 MiB/256 PIDs 报告均通过独立离线审计；两份报告明确标记 `physicalDevice:false`，因此不能替代固定型号低配路由器上的物理报告，本 ADR 保持 Proposed。
diff --git a/docs/adr/ADR-0387-local-api-cancellation-linux-live-evidence.md b/docs/adr/ADR-0387-local-api-cancellation-linux-live-evidence.md
new file mode 100644
index 00000000..b5de8fb1
--- /dev/null
+++ b/docs/adr/ADR-0387-local-api-cancellation-linux-live-evidence.md
@@ -0,0 +1,43 @@
+# ADR-0387：Local API Cancellation Linux 组合实证门
+
+- 状态：Accepted
+- 日期：2026-08-12
+- 关联 RFC：QL-RFC-0001 D-299
+- 前置决策：ADR-0364、ADR-0366、ADR-0367、ADR-0372、ADR-0373、ADR-0376、ADR-0380
+
+## 上下文
+
+ADR-0372 已分别证明认证 HTTP 写入 SQLite durable cancellation intent、execution-control 收敛和 Linux `/proc` 子进程退出，但不同测试之间仍存在组合缝隙：HTTP 使用的 Run 可能不是 runtime 实际拉起的 Run，进程 stop 也可能来自命令文件或测试内直接调用，而非同一个 API mutation。
+
+部署用户同时包含 128 MiB 路由设备和 Standalone 主机。默认 Local image 刻意排除 API，不能为了取证把 HTTP listener、认证依赖与 Owner Pepper provider 强塞进所有低配部署；但可选 `edge-application-api | standalone-application-api` 制品已经定义了单进程产品闭包。因此组合门应验证可选 API 制品，同时保持默认 Edge/Standalone 零增量。
+
+## 决策
+
+1. 新增 opt-in `ql3-local-api-cancellation-live-contract`。它只接受 fresh absolute `0600` report path，并要求显式 `QL3_LOCAL_API_CANCELLATION_LIVE=1` 后才允许调用 Docker。
+2. live gate 复用 `ql3-local-profile-artifact-audit` 的离线 pack、精确 import closure 与 runtime JavaScript pruning；auditor 新增 `--output-directory`，只允许复制一个此前不存在的 absolute 目录，不改变默认 stdout schema、预算或已有 14 个 profile 行为。
+3. 每个 profile 在 `node:24.18.0-bookworm-slim` 锁定镜像内以当前非 root UID、read-only root、network none、capabilities none、no-new-privileges、0.5 CPU、16 MiB noexec tmpfs 运行；Edge 固定 128 MiB/64 PIDs，Standalone 固定 256 MiB/256 PIDs。
+4. 同一 Local API 进程经真实 loopback HTTP `task.start` 创建并调度一个长期 command Run。gate 从 SQLite 读取 runtime 持久化的 PID，并从 `/proc/<pid>/stat` 绑定 start ticks；随后真实 HTTP `run.cancel` 必须得到 `accepted → already_requested`。
+5. gate 必须观察唯一 `run.cancel_requested`、唯一 `run.cancelled`、两条 allowed audit、Run/Attempt 均 cancelled、精确 PID/start identity 消失、SQLite integrity `ok`；Local API 有序停止并重启后，同一 Run 仍必须通过 HTTP 观察为 cancelled。
+6. 私有 report 只保存 profile、平台、resource envelope、artifact size/files/modules 和低敏布尔/计数事实；不保存 token、Pepper、路径、命令、Run ID、PID 或业务内容。独立 audit 对缺失 replay、PID exit、durability、资源预算或 qualification 的报告失败关闭。
+7. report 的资格固定为 `linux_virtualized_live_contract`、`physicalDevice:false`。它关闭自动化组合缝隙，但不伪装成固定型号路由器证据，不能单独把 ADR-0372 转为 Accepted。
+8. 不新增 workspace package、生产依赖、migration、表、索引、listener、timer、watcher、连接、cache、sidecar 或默认产品能力。代码放在现有 `scripts/` live/audit 分层中，不制造只有一个文件的微包。
+
+## Package 与低配影响
+
+workspace 仍为 18 个领域 package。新增文件都是发布/证据脚本，不进入任何 runtime artifact；默认 Edge/Standalone image 仍不包含 API。可选 API 制品的 Edge/Standalone 实测为 3,668,052/3,668,196 bytes、429 files、85 loaded modules，分别距 6 MiB 上限保留 2,623,404/2,623,260 bytes。真实运行 API RSS 为 80,736,256/78,868,480 bytes，均低于对应 128/256 MiB envelope。
+
+## 验收状态
+
+- report validator 与 opt-in/no-overwrite 失败关闭测试 3/3 通过；脚本均通过 Node syntax check。
+- 完整 backend 回归 1,180 tests、1,178 pass/2 conditional skip/0 fail；完整 18-package clean build/test 退出 0。
+- package boundary 保持 18 个 workspace package，`singleSourcePackages=[]`、`shallowSourcePackages=[]`；dependency 与 Local image static audit 均为 `compatible:true/findings:[]`。
+- 14 个 Edge/Standalone Profile artifact 全部 compatible。最小 Edge 为 2,467,343 bytes/295 files/53 loaded modules，RSS delta 11,157,504 bytes；最重 Standalone MCP 为 7,168,978 bytes/778 files/213 loaded modules，RSS delta 38,158,336 bytes，均低于各自预算。
+- arm64 Linux Edge 组合门通过：task start/cancellation/exact replay、durable intent/cancelled Event、两条 allowed audit、PID/start identity exit、重启观察、SQLite integrity 全绿；私有报告权限 `0600`，SHA-256 `056f8f1c07f0c5dfe4552fcb605d6b55b194cd826dbf1c720b21fdba4bd55e53`，离线审计零 finding。
+- arm64 Linux Standalone 组合门同样通过；私有报告权限 `0600`，SHA-256 `223b7241ec3af8edea824dd802f24d573d0987c2ec55fd82b380c95acdf46ba7`，离线审计零 finding。
+- PostgreSQL 18.4 arm64 HA 干净重跑通过 123 gates、timeline `1→2`；报告 SHA-256 `4bf01be43b6eaa0bb6b2d5a2510e6a701c7d02a0fe4a0f246e207cc2c63dc003`。
+- CI 在 local image 的 amd64/arm64 matrix 中分别执行 Edge 与 Standalone gate；live 资源为短生命周期，完成后 artifact/evidence 临时目录和容器被清理。
+- 固定型号物理 Edge 设备尚未产生 `physicalDevice:true` 的独立资格报告；ADR-0372 因此继续保持 Proposed。
+
+## 后果
+
+Local cancellation 的自动化证据不再依赖“两个相邻测试看起来可以拼接”的推断，路由器与 Standalone profile 都有同构、可复现的真实 Linux 子进程门。代价是 local-image CI 每个架构额外组装两次可选 API 制品；这是 release evidence 成本，不进入产品常驻面。后续物理 recorder 应复用相同低敏事实和 PID/start identity 语义，但必须增加设备 manifest、反虚拟化检查与签名/导入流程，不能修改本报告的 `physicalDevice:false`。
diff --git a/docs/adr/README.md b/docs/adr/README.md
index f1c9ed78..5107289c 100644
--- a/docs/adr/README.md
+++ b/docs/adr/README.md
@@ -375,7 +375,7 @@
 | [ADR-0369](./ADR-0369-profile-exact-runtime-export-projection.md)                                              | Profile 精确 Runtime Export 投影                                                                                        | Accepted                    |
 | [ADR-0370](./ADR-0370-bounded-project-run-event-timeline-http-api.md)                                          | 有界、Project-scoped 的 RunEvent 时间线 HTTP API                                                                         | Accepted                    |
 | [ADR-0371](./ADR-0371-bounded-project-run-step-list-http-and-mcp-api.md)                                       | 有界、Project-scoped 的 Run StepRun HTTP 与 MCP API                                                                       | Accepted                    |
-| [ADR-0372](./ADR-0372-two-phase-authenticated-local-run-cancellation-api.md)                                   | 两阶段认证的 Local Run Cancellation API                                                                                   | Proposed（实现完成，固定实机 API/进程 stop 门待补） |
+| [ADR-0372](./ADR-0372-two-phase-authenticated-local-run-cancellation-api.md)                                   | 两阶段认证的 Local Run Cancellation API                                                                                   | Proposed（Linux 组合门已完成，固定物理设备报告待补） |
 | [ADR-0373](./ADR-0373-profile-reachable-runtime-javascript-projection.md)                                      | Profile 可达的 Runtime JavaScript 投影                                                                                     | Accepted                     |
 | [ADR-0374](./ADR-0374-shared-bounded-task-discovery-http-api.md)                                               | 共享、有界的 Task Discovery HTTP API                                                                                       | Accepted |
 | [ADR-0375](./ADR-0375-shared-current-task-point-read-api.md)                                                   | 共享的 current Task point-read API                                                                                         | Proposed（设计冻结，实现中） |
@@ -390,6 +390,7 @@
 | [ADR-0384](./ADR-0384-strong-cluster-run-stop-management.md)                                                  | 强认证的 Cluster Run Stop Management 与列级数据库权限                                                                            | Accepted                                |
 | [ADR-0385](./ADR-0385-strong-local-run-stop-product-entry.md)                                                 | 强认证的 Local Run Stop 产品入口与原子审计                                                                                        | Accepted                                |
 | [ADR-0386](./ADR-0386-cluster-run-management-kubernetes-live-evidence.md)                                     | Cluster Run Management Kubernetes 多节点实证                                                                                       | Accepted |
+| [ADR-0387](./ADR-0387-local-api-cancellation-linux-live-evidence.md)                                           | Local API Cancellation Linux 组合实证门                                                                                             | Accepted |
 
 ## 规则
 
diff --git a/package.json b/package.json
index 5d834091..8c863246 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,8 @@
     "audit:approval-management-kubernetes-live:ql3": "node scripts/ql3-approval-management-kubernetes-live-audit.cjs",
     "test:run-management-kubernetes-live:ql3": "pnpm --filter @qinglong/cluster-admin build && pnpm --filter @qinglong/cluster-control build && node scripts/ql3-run-management-kubernetes-live-contract.cjs",
     "audit:run-management-kubernetes-live:ql3": "node scripts/ql3-run-management-kubernetes-live-audit.cjs",
+    "test:local-api-cancellation-live:ql3": "node scripts/ql3-local-api-cancellation-live-contract.cjs",
+    "audit:local-api-cancellation-live:ql3": "node scripts/ql3-local-api-cancellation-live-audit.cjs",
     "test:provider-credential-test-kubernetes-live:ql3": "pnpm --filter @qinglong/cluster-admin build && node scripts/ql3-provider-credential-test-kubernetes-live-contract.cjs",
     "audit:provider-credential-test-kubernetes-live:ql3": "node scripts/ql3-provider-credential-test-kubernetes-live-audit.cjs",
     "test:prompt-output-key-retirement-kubernetes-live:ql3": "pnpm --filter @qinglong/cluster-admin build && node scripts/ql3-prompt-output-key-retirement-kubernetes-live-contract.cjs",
diff --git a/scripts/lib/ql3-local-api-cancellation-live-scenario.cjs b/scripts/lib/ql3-local-api-cancellation-live-scenario.cjs
new file mode 100644
index 00000000..e1502a27
--- /dev/null
+++ b/scripts/lib/ql3-local-api-cancellation-live-scenario.cjs
@@ -0,0 +1,706 @@
+#!/usr/bin/env node
+
+'use strict';
+
+const crypto = require('node:crypto');
+const fs = require('node:fs');
+const http = require('node:http');
+const net = require('node:net');
+const path = require('node:path');
+const { createRequire } = require('node:module');
+const { spawn } = require('node:child_process');
+const { DatabaseSync } = require('node:sqlite');
+
+const TIMEOUT_MS = 45_000;
+
+function fail(message) {
+  throw new Error(
+    `QingLong Local API cancellation scenario failed: ${message}`,
+  );
+}
+
+function options(argv) {
+  if (argv.length !== 3)
+    fail('usage: artifact-root evidence-root edge|standalone');
+  const [artifactRoot, evidenceRoot, profile] = argv;
+  for (const [value, label] of [
+    [artifactRoot, 'artifact root'],
+    [evidenceRoot, 'evidence root'],
+  ]) {
+    if (!path.isAbsolute(value) || path.normalize(value) !== value) {
+      fail(`${label} must be absolute and normalized`);
+    }
+  }
+  if (!['edge', 'standalone'].includes(profile)) fail('profile is invalid');
+  return Object.freeze({ artifactRoot, evidenceRoot, profile });
+}
+
+function privateDirectory(directory) {
+  fs.mkdirSync(directory, { recursive: true, mode: 0o700 });
+  fs.chmodSync(directory, 0o700);
+  const stat = fs.lstatSync(directory);
+  if (
+    !stat.isDirectory() ||
+    stat.isSymbolicLink() ||
+    (stat.mode & 0o777) !== 0o700
+  ) {
+    fail(`private directory is invalid: ${directory}`);
+  }
+}
+
+function privateJson(filePath, value) {
+  fs.writeFileSync(filePath, `${JSON.stringify(value, null, 2)}\n`, {
+    flag: 'wx',
+    mode: 0o600,
+  });
+}
+
+function procStartTicks(pid) {
+  const fields = fs.readFileSync(`/proc/${pid}/stat`, 'utf8').trim().split(' ');
+  const ticks = fields[21];
+  if (!/^[1-9][0-9]*$/.test(ticks ?? ''))
+    fail('process start ticks are invalid');
+  return ticks;
+}
+
+function sameProcessExists(pid, startTicks) {
+  try {
+    return procStartTicks(pid) === startTicks;
+  } catch (error) {
+    if (error?.code === 'ENOENT' || error?.code === 'ESRCH') return false;
+    throw error;
+  }
+}
+
+function rssBytes(pid) {
+  const status = fs.readFileSync(`/proc/${pid}/status`, 'utf8');
+  const match = /^VmRSS:\s+(\d+) kB$/m.exec(status);
+  if (!match) fail('process RSS is unavailable');
+  return Number(match[1]) * 1024;
+}
+
+function request(port, token, requestPath, values = {}) {
+  return new Promise((resolve, reject) => {
+    const outgoing = http.request(
+      {
+        host: '127.0.0.1',
+        port,
+        path: requestPath,
+        method: values.method ?? 'GET',
+        headers: {
+          authorization: `Bearer ${token}`,
+          connection: 'close',
+          ...(values.headers ?? {}),
+        },
+      },
+      (response) => {
+        const chunks = [];
+        response.on('data', (chunk) => chunks.push(chunk));
+        response.on('end', () => {
+          try {
+            resolve({
+              statusCode: response.statusCode,
+              body: JSON.parse(Buffer.concat(chunks).toString('utf8')),
+            });
+          } catch (error) {
+            reject(error);
+          }
+        });
+      },
+    );
+    outgoing.once('error', reject);
+    if (values.body !== undefined) outgoing.write(values.body);
+    outgoing.end();
+  });
+}
+
+function reservePort() {
+  return new Promise((resolve, reject) => {
+    const server = net.createServer();
+    server.once('error', reject);
+    server.listen(0, '127.0.0.1', () => {
+      const address = server.address();
+      server.close((error) => {
+        if (error) reject(error);
+        else if (!address || typeof address === 'string') {
+          reject(new Error('dynamic loopback port is unavailable'));
+        } else resolve(address.port);
+      });
+    });
+  });
+}
+
+async function waitFor(probe, label) {
+  const deadline = Date.now() + TIMEOUT_MS;
+  let lastError;
+  while (Date.now() < deadline) {
+    try {
+      const value = await probe();
+      if (value) return value;
+    } catch (error) {
+      lastError = error;
+    }
+    await new Promise((resolve) => setTimeout(resolve, 100));
+  }
+  fail(`${label} did not converge${lastError ? `: ${lastError.message}` : ''}`);
+}
+
+function query(databasePath, sql, ...parameters) {
+  const database = new DatabaseSync(databasePath, {
+    readOnly: true,
+    timeout: 100,
+  });
+  try {
+    return database.prepare(sql).get(...parameters);
+  } finally {
+    database.close();
+  }
+}
+
+function insertTaskAndIdentity(
+  modules,
+  databasePath,
+  pepperKeyId,
+  pepper,
+  now,
+) {
+  const {
+    apiCredentialSecretDigest,
+    createBuiltInTaskSpecSemanticRegistry,
+    createTaskDefinitionRecord,
+    compileLocalCommandTaskDefinition,
+    formatApiCredentialToken,
+  } = modules;
+  const credentialId = 'local-live-operator';
+  const subjectId = 'local-live-user';
+  const secret = crypto.randomBytes(32).toString('base64url');
+  const taskSemantics = createBuiltInTaskSpecSemanticRegistry();
+  const taskCommand = {
+    projectId: 'default',
+    taskId: 'live-cancellation-task',
+    expectedRevision: null,
+    mutationId: '019f8700-0000-7000-8000-000000000001',
+    name: 'Local API cancellation live task',
+    kind: 'command',
+    spec: {
+      schema: 'qinglong/command@v1',
+      config: {
+        command: {
+          kind: 'argv',
+          file: '/bin/sh',
+          args: ['-c', 'trap "exit 0" TERM INT; while :; do sleep 1; done'],
+        },
+      },
+    },
+    labels: {},
+    enabled: true,
+    occurredAtMs: now,
+  };
+  const definition = createTaskDefinitionRecord(
+    {
+      ...taskCommand,
+      spec: taskSemantics.normalize({
+        projectId: taskCommand.projectId,
+        taskId: taskCommand.taskId,
+        kind: taskCommand.kind,
+        spec: taskCommand.spec,
+      }),
+    },
+    now,
+  );
+  const execution = compileLocalCommandTaskDefinition(
+    definition,
+    taskSemantics,
+  );
+  const database = new DatabaseSync(databasePath, { timeout: 100 });
+  try {
+    database.exec('PRAGMA foreign_keys = ON; BEGIN IMMEDIATE');
+    database
+      .prepare(
+        `INSERT INTO "QingLong3IdentitySubjects" (
+         "subject_type", "subject_id", "status", "version",
+         "created_at_ms", "updated_at_ms"
+       ) VALUES ('user', ?, 'active', 1, ?, ?)`,
+      )
+      .run(subjectId, now, now);
+    database
+      .prepare(
+        `INSERT INTO "QingLong3ApiCredentials" (
+         "credential_id", "version", "state", "subject_type", "subject_id",
+         "secret_digest", "created_at_ms", "not_before_at_ms", "expires_at_ms"
+       ) VALUES (?, 1, 'active', 'user', ?, ?, ?, ?, ?)`,
+      )
+      .run(
+        credentialId,
+        subjectId,
+        apiCredentialSecretDigest(pepper, credentialId, secret),
+        now,
+        now,
+        now + 3_600_000,
+      );
+    database
+      .prepare(
+        `INSERT INTO "QingLong3ApiCredentialPepperBindings" (
+         "credential_id", "credential_version", "pepper_key_id"
+       ) VALUES (?, 1, ?)`,
+      )
+      .run(credentialId, pepperKeyId);
+    database
+      .prepare(
+        `INSERT INTO "QingLong3ProjectRoleBindings" (
+         "project_id", "subject_type", "subject_id", "version", "state",
+         "role", "mutation_id", "changed_by_type", "changed_by_id",
+         "created_at_ms"
+       ) VALUES ('default', 'user', ?, 1, 'active', 'operator', ?, 'system',
+                 'local-live-gate', ?)`,
+      )
+      .run(subjectId, 'local-live-role-binding', now);
+    database
+      .prepare(
+        `INSERT INTO "QingLong3TaskDefinitions" (
+         "project_id", "task_id", "current_revision", "created_at_ms",
+         "updated_at_ms"
+       ) VALUES (?, ?, ?, ?, ?)`,
+      )
+      .run(
+        definition.projectId,
+        definition.taskId,
+        definition.revision,
+        now,
+        now,
+      );
+    database
+      .prepare(
+        `INSERT INTO "QingLong3TaskDefinitionRevisions" (
+         "project_id", "task_id", "revision", "mutation_id", "name",
+         "description", "kind", "spec_json", "labels_json", "enabled",
+         "content_digest", "created_at_ms"
+       ) VALUES (?, ?, ?, ?, ?, NULL, ?, ?, ?, 1, ?, ?)`,
+      )
+      .run(
+        definition.projectId,
+        definition.taskId,
+        definition.revision,
+        definition.mutationId,
+        definition.name,
+        definition.kind,
+        JSON.stringify(definition.spec),
+        JSON.stringify(definition.labels),
+        definition.contentDigest,
+        now,
+      );
+    database
+      .prepare(
+        `INSERT INTO "QingLong3LocalExecutionContextRecipes" (
+         "context_ref", "environment_json", "content_digest", "created_at_ms"
+       ) VALUES (?, ?, ?, ?)`,
+      )
+      .run(
+        execution.contextRecipe.contextRef,
+        JSON.stringify(execution.contextRecipe.environment),
+        execution.contextRecipe.contentDigest,
+        execution.contextRecipe.createdAtMs,
+      );
+    database
+      .prepare(
+        `INSERT INTO "QingLong3LocalTaskExecutionRevisions" (
+         "project_id", "task_id", "task_revision", "executor_type",
+         "command_json", "working_directory", "timeout_ms", "context_ref",
+         "content_digest", "created_at_ms"
+       ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+      )
+      .run(
+        execution.executionRevision.projectId,
+        execution.executionRevision.taskId,
+        execution.executionRevision.taskRevision,
+        execution.executionRevision.executorType,
+        JSON.stringify(execution.executionRevision.command),
+        execution.executionRevision.workingDirectory ?? null,
+        execution.executionRevision.timeoutMs ?? null,
+        execution.executionRevision.contextRef,
+        execution.executionRevision.contentDigest,
+        execution.executionRevision.createdAtMs,
+      );
+    database.exec('COMMIT');
+  } catch (error) {
+    if (database.isTransaction) database.exec('ROLLBACK');
+    throw error;
+  } finally {
+    database.close();
+  }
+  return Object.freeze({
+    definition,
+    token: formatApiCredentialToken(credentialId, secret),
+  });
+}
+
+function startApi(executable, configPath) {
+  const child = spawn(process.execPath, [executable, '--config', configPath], {
+    stdio: ['ignore', 'pipe', 'pipe'],
+    env: { ...process.env, NODE_ENV: 'production' },
+  });
+  const events = [];
+  let stdout = '';
+  let stderr = '';
+  child.stdout.setEncoding('utf8');
+  child.stderr.setEncoding('utf8');
+  child.stdout.on('data', (chunk) => {
+    stdout += chunk;
+    while (stdout.includes('\n')) {
+      const index = stdout.indexOf('\n');
+      const line = stdout.slice(0, index);
+      stdout = stdout.slice(index + 1);
+      if (line) events.push(JSON.parse(line));
+    }
+  });
+  child.stderr.on('data', (chunk) => {
+    stderr = (stderr + chunk).slice(-16_384);
+  });
+  const exit = new Promise((resolve, reject) => {
+    child.once('error', reject);
+    child.once('exit', (code, signal) => resolve({ code, signal }));
+  });
+  return Object.freeze({ child, events, exit, stderr: () => stderr });
+}
+
+async function stopApi(active) {
+  active.child.kill('SIGTERM');
+  const outcome = await Promise.race([
+    active.exit,
+    new Promise((_, reject) =>
+      setTimeout(() => reject(new Error('API stop timeout')), 30_000),
+    ),
+  ]);
+  if (outcome.code !== 0 || outcome.signal !== null) {
+    fail(
+      `API process did not stop cleanly: ${JSON.stringify({
+        ...outcome,
+        stderr: active.stderr(),
+      })}`,
+    );
+  }
+  return outcome;
+}
+
+async function main(argv = process.argv.slice(2)) {
+  const value = options(argv);
+  if (process.platform !== 'linux' || !fs.existsSync('/proc/self/stat')) {
+    fail('a real Linux /proc runtime is required');
+  }
+  privateDirectory(value.evidenceRoot);
+  const deploymentRoot = path.join(value.evidenceRoot, 'deployment');
+  for (const directory of [
+    deploymentRoot,
+    path.join(deploymentRoot, 'owner-peppers'),
+    path.join(deploymentRoot, 'receipts'),
+    path.join(deploymentRoot, 'artifacts'),
+    path.join(deploymentRoot, 'plugin-staging'),
+    path.join(deploymentRoot, 'plugin-activation'),
+  ])
+    privateDirectory(directory);
+
+  const artifactRequire = createRequire(
+    path.join(value.artifactRoot, 'package.json'),
+  );
+  const { migrateLocalSqlitePath } = artifactRequire(
+    '@qinglong/local-sqlite/migration',
+  );
+  const { LocalOwnerPepperKeyringFileProvider, provisionLocalOwnerPepperKey } =
+    artifactRequire('@qinglong/local-owner-console/pepper-custody');
+  const { provisionLocalSecretKeyring } = artifactRequire(
+    '@qinglong/local-secret',
+  );
+  const tokenModule = artifactRequire(
+    '@qinglong/runtime-core/api-credential-token',
+  );
+  const definitionModule = artifactRequire(
+    '@qinglong/runtime-core/task-definition',
+  );
+  const compilerModule = artifactRequire(
+    '@qinglong/runtime-core/task-definition-execution-compiler',
+  );
+  const semanticModule = artifactRequire(
+    '@qinglong/runtime-core/task-spec-semantic',
+  );
+  const databasePath = path.join(deploymentRoot, 'qinglong3.sqlite');
+  const pepperKeyId = 'owner-v1';
+  const now = Date.now();
+  const pepperSummary = provisionLocalOwnerPepperKey({
+    keyringDirectory: path.join(deploymentRoot, 'owner-peppers'),
+    pepperKeyId,
+  });
+  await migrateLocalSqlitePath({ databasePath, profile: value.profile });
+  await provisionLocalSecretKeyring(
+    path.join(deploymentRoot, 'local-secret-keyring.json'),
+  );
+  const database = new DatabaseSync(databasePath);
+  try {
+    database
+      .prepare(
+        `INSERT INTO "QingLong3LocalOwnerPepperKeys" (
+         "pepper_key_id", "material_digest", "backup_digest", "state",
+         "version", "register_mutation_id", "activate_mutation_id",
+         "registered_at_ms", "activated_at_ms"
+       ) VALUES (?, ?, ?, 'active', 2, ?, ?, ?, ?)`,
+      )
+      .run(
+        pepperKeyId,
+        pepperSummary.digest,
+        'b'.repeat(64),
+        '019f8700-0000-4000-8000-000000000002',
+        '019f8700-0000-4000-8000-000000000003',
+        now,
+        now,
+      );
+    database
+      .prepare(
+        `INSERT INTO "QingLong3LocalOwnerPepperActivations" (
+         "generation", "mutation_id", "expected_generation",
+         "previous_pepper_key_id", "active_pepper_key_id", "material_digest",
+         "backup_digest", "activated_at_ms"
+       ) VALUES (1, ?, 0, NULL, ?, ?, ?, ?)`,
+      )
+      .run(
+        '019f8700-0000-4000-8000-000000000003',
+        pepperKeyId,
+        pepperSummary.digest,
+        'b'.repeat(64),
+        now,
+      );
+  } finally {
+    database.close();
+  }
+  const pepper = new LocalOwnerPepperKeyringFileProvider(
+    path.join(deploymentRoot, 'owner-peppers'),
+  ).resolve(pepperKeyId).pepper;
+  const seeded = insertTaskAndIdentity(
+    {
+      ...tokenModule,
+      ...definitionModule,
+      ...compilerModule,
+      ...semanticModule,
+    },
+    databasePath,
+    pepperKeyId,
+    pepper,
+    now,
+  );
+  const port = await reservePort();
+  const applicationConfigPath = path.join(
+    deploymentRoot,
+    'local-application.json',
+  );
+  const apiConfigPath = path.join(deploymentRoot, 'local-api.json');
+  privateJson(applicationConfigPath, {
+    schema: 'qinglong/local-application-process@v2',
+    instanceId: `local-api-cancellation-${value.profile}`,
+    profile: value.profile,
+    storage: { mode: 'fresh', databasePath, busyTimeoutMs: 100 },
+    runtime: {
+      receiptRoot: path.join(deploymentRoot, 'receipts'),
+      artifactRoot: path.join(deploymentRoot, 'artifacts'),
+      secretKeyringPath: path.join(deploymentRoot, 'local-secret-keyring.json'),
+    },
+    pluginPackages: {
+      stagingRoot: path.join(deploymentRoot, 'plugin-staging'),
+      activationRoot: path.join(deploymentRoot, 'plugin-activation'),
+      recoverySource: { mode: 'disabled' },
+      pageSize: value.profile === 'edge' ? 4 : 16,
+      maxPages: 1,
+      taskPublicationPageSize: value.profile === 'edge' ? 4 : 16,
+      taskPublicationMaxPages: 1,
+    },
+    ai: { deployment: 'excluded' },
+  });
+  privateJson(apiConfigPath, {
+    schema: 'qinglong/local-api-process@v1',
+    deploymentRoot,
+    applicationConfigFilePath: applicationConfigPath,
+    ownerPepperKeyringDirectory: path.join(deploymentRoot, 'owner-peppers'),
+    listener: { host: '127.0.0.1', port },
+  });
+  const executable = path.join(
+    value.artifactRoot,
+    'node_modules/@qinglong/local-api/dist/cli.js',
+  );
+  let active = startApi(executable, apiConfigPath);
+  try {
+    await waitFor(
+      () => active.events.some((event) => event.event === 'listening'),
+      'Local API listener',
+    );
+    const startBody = JSON.stringify({
+      schema: 'qinglong/task-start@v1',
+      mutationId: '019f8700-0000-7000-8000-000000000004',
+      expectedRevision: seeded.definition.revision,
+      expectedContentDigest: seeded.definition.contentDigest,
+    });
+    const started = await request(
+      port,
+      seeded.token,
+      '/api/v3/projects/default/tasks/live-cancellation-task/runs',
+      {
+        method: 'POST',
+        headers: {
+          'content-type': 'application/json',
+          'content-length': String(Buffer.byteLength(startBody)),
+        },
+        body: startBody,
+      },
+    );
+    if (started.statusCode !== 202 || started.body.status !== 'accepted') {
+      fail(`task start was rejected: ${JSON.stringify(started)}`);
+    }
+    const running = await waitFor(() => {
+      const row = query(
+        databasePath,
+        `SELECT run.status, attempt.status AS attemptStatus, attempt.pid
+           FROM Runs AS run JOIN RunAttempts AS attempt ON attempt.run_id = run.id
+          WHERE run.id = ?`,
+        started.body.runId,
+      );
+      return row?.status === 'running' &&
+        row?.attemptStatus === 'running' &&
+        row?.pid
+        ? row
+        : null;
+    }, 'task process start');
+    const taskPid = Number(running.pid);
+    const taskStartTicks = procStartTicks(taskPid);
+    const apiRssBytes = rssBytes(active.child.pid);
+    const cancellationBody = JSON.stringify({
+      schema: 'qinglong/run-cancellation@v1',
+      mutationId: 'local-live-cancellation-1',
+    });
+    const cancellationPath = `/api/v3/projects/default/runs/${started.body.runId}/cancellation`;
+    const requestOptions = {
+      method: 'POST',
+      headers: {
+        'content-type': 'application/json',
+        'content-length': String(Buffer.byteLength(cancellationBody)),
+      },
+      body: cancellationBody,
+    };
+    const accepted = await request(
+      port,
+      seeded.token,
+      cancellationPath,
+      requestOptions,
+    );
+    const replay = await request(
+      port,
+      seeded.token,
+      cancellationPath,
+      requestOptions,
+    );
+    if (accepted.statusCode !== 202 || accepted.body.status !== 'accepted') {
+      fail(`cancellation was rejected: ${JSON.stringify(accepted)}`);
+    }
+    if (
+      replay.statusCode !== 200 ||
+      replay.body.status !== 'already_requested'
+    ) {
+      fail(`cancellation replay drifted: ${JSON.stringify(replay)}`);
+    }
+    const terminal = await waitFor(() => {
+      const row = query(
+        databasePath,
+        `SELECT run.status, attempt.status AS attemptStatus
+           FROM Runs AS run JOIN RunAttempts AS attempt ON attempt.run_id = run.id
+          WHERE run.id = ?`,
+        started.body.runId,
+      );
+      return row?.status === 'cancelled' && row?.attemptStatus === 'cancelled'
+        ? row
+        : null;
+    }, 'durable cancellation');
+    await waitFor(
+      () => !sameProcessExists(taskPid, taskStartTicks),
+      'task process identity exit',
+    );
+    await stopApi(active);
+    active = startApi(executable, apiConfigPath);
+    await waitFor(
+      () => active.events.some((event) => event.event === 'listening'),
+      'restarted Local API listener',
+    );
+    const observed = await request(
+      port,
+      seeded.token,
+      `/api/v3/projects/default/runs/${started.body.runId}`,
+    );
+    if (
+      observed.statusCode !== 200 ||
+      observed.body.run.status !== 'cancelled'
+    ) {
+      fail(`restart observation drifted: ${JSON.stringify(observed)}`);
+    }
+    await stopApi(active);
+    const facts = query(
+      databasePath,
+      `SELECT
+         (SELECT COUNT(*) FROM RunEvents WHERE run_id = ? AND type = 'run.cancel_requested') AS cancelEvents,
+         (SELECT COUNT(*) FROM RunEvents WHERE run_id = ? AND type = 'run.cancelled') AS cancelledEvents,
+         (SELECT COUNT(*) FROM QingLong3SecurityAuditEvents WHERE operation_id = 'run.cancel' AND outcome = 'allowed') AS cancelAudits,
+         (SELECT integrity_check FROM pragma_integrity_check LIMIT 1) AS integrity`,
+      started.body.runId,
+      started.body.runId,
+    );
+    if (
+      facts.cancelEvents !== 1 ||
+      facts.cancelledEvents !== 1 ||
+      facts.cancelAudits !== 2 ||
+      facts.integrity !== 'ok'
+    )
+      fail(`durable facts drifted: ${JSON.stringify(facts)}`);
+    const report = {
+      schemaVersion: 1,
+      profile: value.profile,
+      platform: { os: 'linux', architecture: process.arch, procfs: true },
+      resourceEnvelope: {
+        memoryBytes:
+          value.profile === 'edge' ? 128 * 1024 * 1024 : 256 * 1024 * 1024,
+        pids: value.profile === 'edge' ? 64 : 256,
+        apiRssBytes,
+      },
+      observations: {
+        taskStartAccepted: true,
+        cancellationAccepted: true,
+        exactReplay: true,
+        durableIntentEvents: facts.cancelEvents,
+        durableCancellationEvents: facts.cancelledEvents,
+        durableAllowedAudits: facts.cancelAudits,
+        processIdentityObserved: true,
+        processIdentityGone: !sameProcessExists(taskPid, taskStartTicks),
+        restartObservedCancelled: true,
+        sqliteIntegrity: facts.integrity,
+      },
+      qualification: {
+        evidenceClass: 'linux_virtualized_live_contract',
+        physicalDevice: false,
+        passed: true,
+      },
+      compatible: terminal.status === 'cancelled',
+    };
+    privateJson(path.join(value.evidenceRoot, 'report.json'), report);
+    process.stdout.write(`${JSON.stringify(report)}\n`);
+  } finally {
+    if (active.child.exitCode === null && active.child.signalCode === null) {
+      active.child.kill('SIGKILL');
+      await active.exit.catch(() => undefined);
+    }
+  }
+}
+
+if (require.main === module) {
+  main().catch((error) => {
+    process.stderr.write(
+      `${
+        error instanceof Error ? error.stack || error.message : String(error)
+      }\n`,
+    );
+    process.exitCode = 1;
+  });
+}
+
+module.exports = { options };
diff --git a/scripts/ql3-local-api-cancellation-live-audit.cjs b/scripts/ql3-local-api-cancellation-live-audit.cjs
new file mode 100644
index 00000000..765970ed
--- /dev/null
+++ b/scripts/ql3-local-api-cancellation-live-audit.cjs
@@ -0,0 +1,164 @@
+#!/usr/bin/env node
+
+'use strict';
+
+const fs = require('node:fs');
+const path = require('node:path');
+
+const PROFILES = new Set(['edge', 'standalone']);
+
+function exactKeys(value, expected) {
+  return (
+    value !== null &&
+    typeof value === 'object' &&
+    !Array.isArray(value) &&
+    JSON.stringify(Object.keys(value).sort()) ===
+      JSON.stringify([...expected].sort())
+  );
+}
+
+function validateLocalApiCancellationLiveReport(value) {
+  const findings = [];
+  const record = exactKeys(value, [
+    'artifact',
+    'compatible',
+    'observations',
+    'platform',
+    'profile',
+    'qualification',
+    'resourceEnvelope',
+    'schemaVersion',
+  ]);
+  if (!record || value.schemaVersion !== 1 || !PROFILES.has(value.profile)) {
+    return Object.freeze({
+      compatible: false,
+      findings: ['report identity is invalid'],
+    });
+  }
+  const expectedMemory =
+    value.profile === 'edge' ? 128 * 1024 * 1024 : 256 * 1024 * 1024;
+  const expectedPids = value.profile === 'edge' ? 64 : 256;
+  if (
+    !exactKeys(value.platform, ['architecture', 'os', 'procfs']) ||
+    value.platform?.os !== 'linux' ||
+    !['arm64', 'x64'].includes(value.platform?.architecture) ||
+    value.platform?.procfs !== true
+  )
+    findings.push('Linux /proc platform observation is invalid');
+  if (
+    !exactKeys(value.resourceEnvelope, [
+      'apiRssBytes',
+      'memoryBytes',
+      'pids',
+    ]) ||
+    value.resourceEnvelope?.memoryBytes !== expectedMemory ||
+    value.resourceEnvelope?.pids !== expectedPids ||
+    !Number.isSafeInteger(value.resourceEnvelope?.apiRssBytes) ||
+    value.resourceEnvelope.apiRssBytes < 1 ||
+    value.resourceEnvelope.apiRssBytes > expectedMemory
+  )
+    findings.push('resource envelope is invalid');
+  if (
+    !exactKeys(value.artifact, [
+      'bytes',
+      'compatible',
+      'files',
+      'loadedModules',
+      'profile',
+    ]) ||
+    value.artifact?.profile !== `${value.profile}-application-api` ||
+    !Number.isSafeInteger(value.artifact?.bytes) ||
+    value.artifact.bytes < 1 ||
+    value.artifact.bytes > 6 * 1024 * 1024 ||
+    !Number.isSafeInteger(value.artifact?.files) ||
+    value.artifact.files < 1 ||
+    value.artifact.files > 640 ||
+    !Number.isSafeInteger(value.artifact?.loadedModules) ||
+    value.artifact.loadedModules < 1 ||
+    value.artifact.loadedModules > 256 ||
+    value.artifact.compatible !== true
+  )
+    findings.push('optional API artifact evidence is invalid');
+  const observed = value.observations;
+  if (
+    !exactKeys(observed, [
+      'cancellationAccepted',
+      'durableAllowedAudits',
+      'durableCancellationEvents',
+      'durableIntentEvents',
+      'exactReplay',
+      'processIdentityGone',
+      'processIdentityObserved',
+      'restartObservedCancelled',
+      'sqliteIntegrity',
+      'taskStartAccepted',
+    ]) ||
+    observed?.taskStartAccepted !== true ||
+    observed?.cancellationAccepted !== true ||
+    observed?.exactReplay !== true ||
+    observed?.durableIntentEvents !== 1 ||
+    observed?.durableCancellationEvents !== 1 ||
+    observed?.durableAllowedAudits !== 2 ||
+    observed?.processIdentityObserved !== true ||
+    observed?.processIdentityGone !== true ||
+    observed?.restartObservedCancelled !== true ||
+    observed?.sqliteIntegrity !== 'ok'
+  )
+    findings.push('API to durable process-stop observations are incomplete');
+  if (
+    !exactKeys(value.qualification, [
+      'evidenceClass',
+      'passed',
+      'physicalDevice',
+    ]) ||
+    value.qualification?.evidenceClass !== 'linux_virtualized_live_contract' ||
+    value.qualification?.physicalDevice !== false ||
+    value.qualification?.passed !== true
+  )
+    findings.push('qualification boundary is invalid');
+  if (value.compatible !== true) findings.push('report is not compatible');
+  return Object.freeze({
+    compatible: findings.length === 0,
+    findings: Object.freeze(findings),
+  });
+}
+
+function reportPath(argv) {
+  if (
+    argv.length !== 1 ||
+    !argv[0].startsWith('--report=') ||
+    !path.isAbsolute(argv[0].slice('--report='.length))
+  )
+    throw new Error(
+      'usage: ql3-local-api-cancellation-live-audit --report=/absolute/private-report.json',
+    );
+  return argv[0].slice('--report='.length);
+}
+
+if (require.main === module) {
+  try {
+    const filePath = reportPath(process.argv.slice(2));
+    const stat = fs.lstatSync(filePath);
+    if (
+      !stat.isFile() ||
+      stat.isSymbolicLink() ||
+      (typeof process.getuid === 'function' && stat.uid !== process.getuid()) ||
+      (stat.mode & 0o077) !== 0 ||
+      stat.size > 32 * 1024
+    ) {
+      throw new Error('report must be a private bounded regular file');
+    }
+    const audit = validateLocalApiCancellationLiveReport(
+      JSON.parse(fs.readFileSync(filePath, 'utf8')),
+    );
+    process.stdout.write(`${JSON.stringify(audit)}\n`);
+    if (!audit.compatible) process.exitCode = 1;
+  } catch (error) {
+    process.stderr.write(
+      `${error instanceof Error ? error.message : String(error)}\n`,
+    );
+    process.exitCode = 1;
+  }
+}
+
+module.exports = { validateLocalApiCancellationLiveReport };
diff --git a/scripts/ql3-local-api-cancellation-live-contract.cjs b/scripts/ql3-local-api-cancellation-live-contract.cjs
new file mode 100644
index 00000000..53e5ed0d
--- /dev/null
+++ b/scripts/ql3-local-api-cancellation-live-contract.cjs
@@ -0,0 +1,175 @@
+#!/usr/bin/env node
+
+'use strict';
+
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const os = require('node:os');
+const path = require('node:path');
+const { spawnSync } = require('node:child_process');
+
+const {
+  validateLocalApiCancellationLiveReport,
+} = require('./ql3-local-api-cancellation-live-audit.cjs');
+
+const ROOT = path.resolve(__dirname, '..');
+const NODE_IMAGE =
+  'node:24.18.0-bookworm-slim@sha256:6f7b03f7c2c8e2e784dcf9295400527b9b1270fd37b7e9a7285cf83b6951452d';
+
+function fail(message) {
+  throw new Error(
+    `QingLong Local API cancellation live contract failed: ${message}`,
+  );
+}
+
+function argumentsOf(argv) {
+  if (argv.length !== 2)
+    fail(
+      'usage: --profile=edge|standalone --report=/absolute/private-report.json',
+    );
+  const values = Object.fromEntries(
+    argv.map((argument) => {
+      const match = /^--(profile|report)=(.+)$/.exec(argument);
+      if (!match) fail(`unsupported argument ${argument}`);
+      return [match[1], match[2]];
+    }),
+  );
+  if (!['edge', 'standalone'].includes(values.profile))
+    fail('profile is invalid');
+  if (
+    !path.isAbsolute(values.report ?? '') ||
+    path.normalize(values.report) !== values.report ||
+    path.parse(values.report).root === values.report ||
+    fs.existsSync(values.report)
+  )
+    fail('report must be a fresh normalized absolute non-root path');
+  const parent = fs.lstatSync(path.dirname(values.report));
+  if (!parent.isDirectory() || parent.isSymbolicLink())
+    fail('report parent must be a real directory');
+  return Object.freeze(values);
+}
+
+function run(command, args, options = {}) {
+  const result = spawnSync(command, args, {
+    cwd: ROOT,
+    encoding: 'utf8',
+    maxBuffer: 4 * 1024 * 1024,
+    ...options,
+  });
+  if (result.error) throw result.error;
+  if (result.status !== 0) {
+    fail(
+      `${command} ${args[0]} failed: ${(result.stderr || result.stdout)
+        .trim()
+        .slice(0, 4096)}`,
+    );
+  }
+  return result.stdout.trim();
+}
+
+function main(argv = process.argv.slice(2)) {
+  const selected = argumentsOf(argv);
+  if (process.env.QL3_LOCAL_API_CANCELLATION_LIVE !== '1') {
+    fail('refusing to run Docker without QL3_LOCAL_API_CANCELLATION_LIVE=1');
+  }
+  const temporaryRoot = fs.realpathSync(
+    fs.mkdtempSync(path.join(os.tmpdir(), 'ql3-local-api-cancel-live-')),
+  );
+  fs.chmodSync(temporaryRoot, 0o700);
+  const artifactRoot = path.join(temporaryRoot, 'artifact');
+  const evidenceRoot = path.join(temporaryRoot, 'evidence');
+  fs.mkdirSync(evidenceRoot, { mode: 0o700 });
+  try {
+    const artifactOutput = run(process.execPath, [
+      path.join(ROOT, 'scripts/ql3-local-profile-artifact-audit.cjs'),
+      `${selected.profile}-application-api`,
+      `--output-directory=${artifactRoot}`,
+    ]);
+    const artifact = JSON.parse(artifactOutput.split(/\r?\n/).at(-1));
+    const uid = typeof process.getuid === 'function' ? process.getuid() : null;
+    const gid = typeof process.getgid === 'function' ? process.getgid() : null;
+    if (!Number.isSafeInteger(uid) || !Number.isSafeInteger(gid))
+      fail('a POSIX identity is required');
+    const memory = selected.profile === 'edge' ? '128m' : '256m';
+    const pids = selected.profile === 'edge' ? '64' : '256';
+    run('docker', [
+      'run',
+      '--rm',
+      '--read-only',
+      '--user',
+      `${uid}:${gid}`,
+      '--network',
+      'none',
+      '--cap-drop',
+      'ALL',
+      '--security-opt',
+      'no-new-privileges',
+      '--memory',
+      memory,
+      '--memory-swap',
+      memory,
+      '--cpus',
+      '0.5',
+      '--pids-limit',
+      pids,
+      '--tmpfs',
+      '/tmp:rw,nosuid,nodev,noexec,size=16m',
+      '--volume',
+      `${artifactRoot}:/opt/ql3-artifact:ro`,
+      '--volume',
+      `${path.join(ROOT, 'scripts')}:/opt/ql3-scripts:ro`,
+      '--volume',
+      `${evidenceRoot}:/evidence`,
+      NODE_IMAGE,
+      'node',
+      '/opt/ql3-scripts/lib/ql3-local-api-cancellation-live-scenario.cjs',
+      '/opt/ql3-artifact',
+      '/evidence',
+      selected.profile,
+    ]);
+    const scenario = JSON.parse(
+      fs.readFileSync(path.join(evidenceRoot, 'report.json'), 'utf8'),
+    );
+    const report = Object.freeze({
+      ...scenario,
+      artifact: Object.freeze({
+        profile: artifact.profile,
+        bytes: artifact.artifactBytes,
+        files: artifact.artifactFiles,
+        loadedModules: artifact.loadedModuleCount,
+        compatible: artifact.compatible,
+      }),
+    });
+    const audit = validateLocalApiCancellationLiveReport(report);
+    assert.deepEqual(audit.findings, []);
+    fs.writeFileSync(selected.report, `${JSON.stringify(report, null, 2)}\n`, {
+      flag: 'wx',
+      mode: 0o600,
+    });
+    process.stdout.write(
+      `${JSON.stringify({
+        schemaVersion: 1,
+        profile: selected.profile,
+        reportWritten: true,
+        compatible: true,
+      })}\n`,
+    );
+  } finally {
+    fs.rmSync(temporaryRoot, { recursive: true, force: true });
+  }
+}
+
+if (require.main === module) {
+  try {
+    main();
+  } catch (error) {
+    process.stderr.write(
+      `${
+        error instanceof Error ? error.stack || error.message : String(error)
+      }\n`,
+    );
+    process.exitCode = 1;
+  }
+}
+
+module.exports = { argumentsOf };
diff --git a/scripts/ql3-local-image-audit.cjs b/scripts/ql3-local-image-audit.cjs
index e9b62e08..fcd1ca63 100644
--- a/scripts/ql3-local-image-audit.cjs
+++ b/scripts/ql3-local-image-audit.cjs
@@ -284,8 +284,8 @@ function auditWorkflow(contents, findings) {
     'scripts/ql3-local-image-inventory.cjs',
     '--inventory-root=/opt/qinglong/node_modules',
     'node ../../scripts/ql3-build-package-closure.cjs',
-    '--profile=edge',
-    '--profile=standalone',
+    'node scripts/ql3-local-image-live-contract.cjs --image="${IMAGE}" --profile=edge',
+    'node scripts/ql3-local-image-live-contract.cjs --image="${IMAGE}" --profile=standalone',
   ];
   for (const value of required) {
     if (!job.includes(value)) {
diff --git a/scripts/ql3-local-profile-artifact-audit.cjs b/scripts/ql3-local-profile-artifact-audit.cjs
index 0e46c609..340e4a3c 100644
--- a/scripts/ql3-local-profile-artifact-audit.cjs
+++ b/scripts/ql3-local-profile-artifact-audit.cjs
@@ -48,6 +48,35 @@ function boundedPositiveInteger(value, fallback, label) {
   return normalized;
 }
 
+function outputDirectoryArgument(value) {
+  if (value === undefined) return undefined;
+  if (
+    value.length < 1 ||
+    Buffer.byteLength(value, 'utf8') > 4_096 ||
+    value.includes('\0') ||
+    !path.isAbsolute(value) ||
+    path.normalize(value) !== value ||
+    path.parse(value).root === value
+  ) {
+    fail(
+      'output directory must be a normalized bounded absolute non-root path',
+    );
+  }
+  if (fs.existsSync(value)) {
+    fail('output directory must not already exist');
+  }
+  const parent = path.dirname(value);
+  const stat = fs.lstatSync(parent);
+  if (
+    !stat.isDirectory() ||
+    stat.isSymbolicLink() ||
+    fs.realpathSync(parent) !== parent
+  ) {
+    fail('output directory parent must be a canonical real directory');
+  }
+  return value;
+}
+
 function parseArguments(argv) {
   const profile = argv[0];
   if (
@@ -70,13 +99,23 @@ function parseArguments(argv) {
       'Profile must be edge, standalone, an adopted/application variant, an AI/API variant, or an MCP variant',
     );
   }
-  const values = Object.fromEntries(
-    argv.slice(1).map((argument) => {
-      const match = /^--([a-z-]+)=(\d+)$/.exec(argument);
-      if (!match) fail(`unsupported argument ${argument}`);
-      return [match[1], match[2]];
-    }),
-  );
+  const values = {};
+  for (const argument of argv.slice(1)) {
+    const match = /^--([a-z-]+)=(.+)$/.exec(argument);
+    if (!match || Object.hasOwn(values, match[1])) {
+      fail(`unsupported argument ${argument}`);
+    }
+    values[match[1]] = match[2];
+  }
+  const supported = new Set([
+    'max-artifact-files',
+    'max-artifact-bytes',
+    'max-rss-delta-bytes',
+    'output-directory',
+  ]);
+  for (const name of Object.keys(values)) {
+    if (!supported.has(name)) fail(`unsupported argument --${name}`);
+  }
   return Object.freeze({
     profile,
     runtimeProfile: profile.startsWith('edge') ? 'edge' : 'standalone',
@@ -128,6 +167,7 @@ function parseArguments(argv) {
       profile.includes('-application') && profile.endsWith('-ai')
         ? MIN_APPLICATION_AI_ARTIFACT_HEADROOM_BYTES
         : 0,
+    outputDirectory: outputDirectoryArgument(values['output-directory']),
   });
 }
 
@@ -221,8 +261,7 @@ function auditImportClosure(
   }
   const forbidden = result.loaded.filter(
     (filePath) =>
-      (!allowSemver &&
-        /node_modules[\\/]semver(?:[\\/]|$)/i.test(filePath)) ||
+      (!allowSemver && /node_modules[\\/]semver(?:[\\/]|$)/i.test(filePath)) ||
       /(?:node_modules[\\/](?:croner|pg|drizzle-orm|sequelize|sqlite3)(?:[\\/]|$)|node_modules[\\/]@qinglong[\\/]cluster-|local-sqlite[\\/]dist[\\/]migration\.js$|local-sqlite[\\/]dist[\\/]migrations[\\/])/i.test(
         filePath,
       ),
@@ -309,8 +348,7 @@ function auditLocalApiExecutable(artifactDirectory) {
     artifactDirectory,
   );
   if (
-    output !==
-    'Usage: ql3-local-api --config /absolute/private-config.json'
+    output !== 'Usage: ql3-local-api --config /absolute/private-config.json'
   ) {
     fail('local API executable help output is invalid');
   }
@@ -670,6 +708,13 @@ function main() {
         `import RSS delta is ${closure.rssDeltaBytes} bytes, budget is ${options.maxRssDeltaBytes}`,
       );
     }
+    if (options.outputDirectory !== undefined) {
+      fs.cpSync(artifactDirectory, options.outputDirectory, {
+        recursive: true,
+        errorOnExist: true,
+        force: false,
+      });
+    }
     process.stdout.write(
       `${JSON.stringify({
         schemaVersion: 1,
@@ -680,8 +725,7 @@ function main() {
         maxArtifactFiles: options.maxArtifactFiles,
         maxArtifactBytes: options.maxArtifactBytes,
         artifactHeadroomBytes,
-        minimumArtifactHeadroomBytes:
-          options.minimumArtifactHeadroomBytes,
+        minimumArtifactHeadroomBytes: options.minimumArtifactHeadroomBytes,
         prunedRuntimeDevelopmentFiles: prunedRuntimeArtifact.development.files,
         prunedRuntimeDevelopmentBytes: prunedRuntimeArtifact.development.bytes,
         runtimeJavaScriptFilesBefore:
@@ -716,10 +760,8 @@ function main() {
           prunedRuntimeArtifact.packageManifests.runtimeExports
             .excludedSpecifiers,
         prunedRuntimeArtifactBytes: prunedRuntimeArtifact.savedBytes,
-        prunedMcpExternalDevelopmentFiles:
-          prunedMcpExternalDevelopment.files,
-        prunedMcpExternalDevelopmentBytes:
-          prunedMcpExternalDevelopment.bytes,
+        prunedMcpExternalDevelopmentFiles: prunedMcpExternalDevelopment.files,
+        prunedMcpExternalDevelopmentBytes: prunedMcpExternalDevelopment.bytes,
         loadedModuleCount: closure.loadedModuleCount,
         rssDeltaBytes: closure.rssDeltaBytes,
         maxRssDeltaBytes: options.maxRssDeltaBytes,
diff --git a/test/back/ql3LocalApiCancellationLiveContract.test.cjs b/test/back/ql3LocalApiCancellationLiveContract.test.cjs
new file mode 100644
index 00000000..6047c12e
--- /dev/null
+++ b/test/back/ql3LocalApiCancellationLiveContract.test.cjs
@@ -0,0 +1,123 @@
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const os = require('node:os');
+const path = require('node:path');
+const { spawnSync } = require('node:child_process');
+const { test } = require('node:test');
+
+const {
+  validateLocalApiCancellationLiveReport,
+} = require('../../scripts/ql3-local-api-cancellation-live-audit.cjs');
+
+function report(profile = 'edge') {
+  return {
+    schemaVersion: 1,
+    profile,
+    platform: { os: 'linux', architecture: 'arm64', procfs: true },
+    resourceEnvelope: {
+      memoryBytes: profile === 'edge' ? 128 * 1024 * 1024 : 256 * 1024 * 1024,
+      pids: profile === 'edge' ? 64 : 256,
+      apiRssBytes: 80 * 1024 * 1024,
+    },
+    observations: {
+      taskStartAccepted: true,
+      cancellationAccepted: true,
+      exactReplay: true,
+      durableIntentEvents: 1,
+      durableCancellationEvents: 1,
+      durableAllowedAudits: 2,
+      processIdentityObserved: true,
+      processIdentityGone: true,
+      restartObservedCancelled: true,
+      sqliteIntegrity: 'ok',
+    },
+    qualification: {
+      evidenceClass: 'linux_virtualized_live_contract',
+      physicalDevice: false,
+      passed: true,
+    },
+    compatible: true,
+    artifact: {
+      profile: `${profile}-application-api`,
+      bytes: 4 * 1024 * 1024,
+      files: 429,
+      loadedModules: 85,
+      compatible: true,
+    },
+  };
+}
+
+test('accepts exact Edge and Standalone API to process-stop evidence', () => {
+  for (const profile of ['edge', 'standalone']) {
+    assert.deepEqual(validateLocalApiCancellationLiveReport(report(profile)), {
+      compatible: true,
+      findings: [],
+    });
+  }
+});
+
+test('rejects missing process, replay, resource, artifact or qualification facts', () => {
+  for (const mutate of [
+    (value) => {
+      value.observations.processIdentityGone = false;
+    },
+    (value) => {
+      value.observations.exactReplay = false;
+    },
+    (value) => {
+      value.resourceEnvelope.memoryBytes += 1;
+    },
+    (value) => {
+      value.artifact.bytes = 6 * 1024 * 1024 + 1;
+    },
+    (value) => {
+      value.qualification.physicalDevice = true;
+    },
+    (value) => {
+      value.unreviewed = true;
+    },
+  ]) {
+    const value = report();
+    mutate(value);
+    assert.equal(
+      validateLocalApiCancellationLiveReport(value).compatible,
+      false,
+    );
+  }
+});
+
+test('requires a fresh private report before Docker opt-in is checked', () => {
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), 'ql3-local-cancel-test-'));
+  try {
+    const script = path.resolve(
+      __dirname,
+      '../../scripts/ql3-local-api-cancellation-live-contract.cjs',
+    );
+    const reportPath = path.join(root, 'report.json');
+    const result = spawnSync(
+      process.execPath,
+      [script, '--profile=edge', `--report=${reportPath}`],
+      {
+        encoding: 'utf8',
+        env: { ...process.env, QL3_LOCAL_API_CANCELLATION_LIVE: '0' },
+      },
+    );
+    assert.equal(result.status, 1);
+    assert.match(result.stderr, /refusing to run Docker/);
+    assert.equal(fs.existsSync(reportPath), false);
+    fs.writeFileSync(reportPath, '{}', { mode: 0o600 });
+    const existing = spawnSync(
+      process.execPath,
+      [script, '--profile=edge', `--report=${reportPath}`],
+      {
+        encoding: 'utf8',
+        env: { ...process.env, QL3_LOCAL_API_CANCELLATION_LIVE: '1' },
+      },
+    );
+    assert.equal(existing.status, 1);
+    assert.match(existing.stderr, /fresh normalized absolute/);
+    assert.doesNotMatch(existing.stderr, /docker/i);
+  } finally {
+    fs.rmSync(root, { recursive: true, force: true });
+  }
+});