diff --git a/.agents/skills/unidesk-webdev/SKILL.md b/.agents/skills/unidesk-webdev/SKILL.md
index 5423d0bd..83b45af5 100644
--- a/.agents/skills/unidesk-webdev/SKILL.md
+++ b/.agents/skills/unidesk-webdev/SKILL.md
@@ -27,6 +27,10 @@ description: UniDesk Web 开发与受控浏览器验证技能。用户提到 Web
   - `web-probe` 内部可以使用浏览器引擎，但认证、目标解析、截图、脱敏、artifact 和报告必须由 `web-probe` 合同统一管理；
   - 缺少所需动作时，先在 owning YAML 和 `web-probe` typed command 中补齐通用能力，不得绕过为第二操作面。
 - Web-probe 正式 CLI 入口是 `bun scripts/cli.ts web-probe ...`；旧 `hwlab nodes web-probe` 已移除，只能按 CLI 提示迁移，不要在 issue 或长期文档中继续记录旧入口。
+- `web-probe observe stop` 是 observer 生命周期清理入口：
+  - 不得依赖业务页面 readiness 才执行停止；
+  - graceful command 失败、超时、未消费或缺少有效结果时，默认自动进入 force-stop；
+  - 输出中的 `cleanup.state=confirmed` 才证明进程已停止，`cleanup.state=unknown` 表示远端传输或清理证据仍不完整。
 - 涉及 Web 哨兵、`web-probe sentinel`、`monitor.pikapython.com`、定期/周期巡检或新建巡检时，必须同时加载 `$unidesk-monitor`。
 - 真实用户入口验证优先；源码检查、构建通过或截图局部正常不能替代原入口验收。
 - WebProbe 因内存、浏览器资源或受控启动策略阻断时：
diff --git a/scripts/src/hwlab-node/web-probe-observe-actions.test.ts b/scripts/src/hwlab-node/web-probe-observe-actions.test.ts
index 11c1906e..d6c632aa 100644
--- a/scripts/src/hwlab-node/web-probe-observe-actions.test.ts
+++ b/scripts/src/hwlab-node/web-probe-observe-actions.test.ts
@@ -7,7 +7,7 @@ import { readFileSync } from "node:fs";
 
 import { hwlabRuntimeLaneSpecForNode } from "../hwlab-node-lanes";
 import { rootPath } from "../config";
-import { buildWebObserveCommandVisibility, nodeWebProbeRealtimeFanoutProfiles, nodeWebProbeWorkbenchKafkaDebugReplay, nodeWebProbeWorkbenchTraceReadability, resolveWebObserveActionJson } from "./web-probe-observe-actions";
+import { buildWebObserveCommandVisibility, nodeWebProbeRealtimeFanoutProfiles, nodeWebProbeWorkbenchKafkaDebugReplay, nodeWebProbeWorkbenchTraceReadability, resolveWebObserveActionJson, webObserveStopFallbackReason } from "./web-probe-observe-actions";
 
 test("realtime authority runner contract derives topics, groups, and transactional capabilities from owning YAML", () => {
   const profiles = nodeWebProbeRealtimeFanoutProfiles(hwlabRuntimeLaneSpecForNode("v03", "NC01"));
@@ -120,6 +120,34 @@ test("web observe command visibility does not equate control completion with asy
   assert.equal(visibility.asyncTurn.terminalStatusSource, "not-evaluated-by-control-command");
 });
 
+test("observe stop automatically falls back when graceful cleanup is not proven", () => {
+  assert.equal(webObserveStopFallbackReason({
+    stopCommand: true,
+    exitCode: 255,
+    commandResult: null,
+  }), "graceful-stop-failed");
+  assert.equal(webObserveStopFallbackReason({
+    stopCommand: true,
+    exitCode: 0,
+    commandResult: null,
+  }), "graceful-stop-contract-missing");
+  assert.equal(webObserveStopFallbackReason({
+    stopCommand: true,
+    exitCode: 0,
+    commandResult: { ok: true, queued: true, waitTimedOut: true },
+  }), "graceful-stop-not-consumed");
+  assert.equal(webObserveStopFallbackReason({
+    stopCommand: true,
+    exitCode: 0,
+    commandResult: { ok: true, queued: false, status: "done" },
+  }), null);
+  assert.equal(webObserveStopFallbackReason({
+    stopCommand: false,
+    exitCode: 255,
+    commandResult: null,
+  }), null);
+});
+
 test("web observe action JSON recovery accepts concrete start contract", () => {
   const resolved = resolveWebObserveActionJson({
     stdout: JSON.stringify({
diff --git a/scripts/src/hwlab-node/web-probe-observe-actions.ts b/scripts/src/hwlab-node/web-probe-observe-actions.ts
index 2afa7b76..c3ad62db 100644
--- a/scripts/src/hwlab-node/web-probe-observe-actions.ts
+++ b/scripts/src/hwlab-node/web-probe-observe-actions.ts
@@ -997,6 +997,20 @@ export function buildWebObserveCommandVisibility(input: {
   };
 }
 
+export function webObserveStopFallbackReason(input: {
+  stopCommand: boolean;
+  exitCode: number;
+  commandResult: Record<string, unknown> | null;
+}): string | null {
+  if (!input.stopCommand) return null;
+  if (input.exitCode !== 0) return "graceful-stop-failed";
+  if (input.commandResult === null) return "graceful-stop-contract-missing";
+  if (input.commandResult.ok === false || input.commandResult.status === "failed") return "graceful-stop-rejected";
+  if (input.commandResult.waitTimedOut === true) return "graceful-stop-not-consumed";
+  if (input.commandResult.queued === true) return "graceful-stop-queued";
+  return null;
+}
+
 export function runNodeWebProbeObserveCommand(options: NodeWebProbeObserveOptions, spec: HwlabRuntimeLaneSpec, stopCommand: boolean): Record<string, unknown> | RenderedCliResult {
   const type = options.commandType ?? (stopCommand ? "stop" : null);
   if (type === null) throw new Error("web-probe observe command requires --type");
@@ -1080,7 +1094,7 @@ export function runNodeWebProbeObserveCommand(options: NodeWebProbeObserveOption
     return runNodeWebProbeObserveForceStop(options, spec, payload, commandId, forceBeforeQueueReason, preStopStatus?.result ?? null, preStopStatus?.status ?? null, null);
   }
   const payloadB64 = Buffer.from(JSON.stringify(payload), "utf8").toString("base64");
-  const waitMs = options.force && stopCommand ? Math.max(options.waitMs, 5000) : options.waitMs;
+  const waitMs = stopCommand ? Math.max(options.waitMs, 5000) : options.waitMs;
   const script = [
     "set -eu",
     nodeWebObserveResolveStateDirShell(options),
@@ -1091,21 +1105,18 @@ export function runNodeWebProbeObserveCommand(options: NodeWebProbeObserveOption
   const result = runTransWorkspaceStdinScript(options.node, spec.workspace, script, options.commandTimeoutSeconds);
   const commandResolution = resolveWebObserveActionJson(result, "command");
   const commandResult = commandResolution.parsed;
-  if (options.force && stopCommand && (result.exitCode !== 0 || commandResult?.waitTimedOut === true || commandResult?.queued === true)) {
-    const reason = result.exitCode !== 0
-      ? "graceful-stop-failed"
-      : commandResult?.waitTimedOut === true
-        ? "graceful-stop-not-consumed"
-        : "graceful-stop-queued";
-    return runNodeWebProbeObserveForceStop(options, spec, payload, commandId, reason, preStopStatus?.result ?? null, preStopStatus?.status ?? null, result);
+  const stopFallbackReason = webObserveStopFallbackReason({ stopCommand, exitCode: result.exitCode, commandResult });
+  if (stopFallbackReason !== null) {
+    return runNodeWebProbeObserveForceStop(options, spec, payload, commandId, stopFallbackReason, preStopStatus?.result ?? null, preStopStatus?.status ?? null, result);
   }
   const visibility = buildWebObserveCommandVisibility({
     commandType: type,
     commandResult,
     exitCode: result.exitCode,
   });
+  const commandOk = result.exitCode === 0 && commandResult !== null && commandResult.ok !== false;
   const payloadResult = {
-    ok: result.exitCode === 0 && commandResult !== null && commandResult.ok !== false,
+    ok: commandOk,
     status: visibility.status,
     command: webObserveCommandLabel(stopCommand ? "stop" : "command", options),
     id: webObserveIdFromOptions(options),
@@ -1117,6 +1128,13 @@ export function runNodeWebProbeObserveCommand(options: NodeWebProbeObserveOption
     observer: commandResult,
     control: visibility.control,
     asyncTurn: visibility.asyncTurn,
+    cleanup: stopCommand ? {
+      attempted: true,
+      mode: "graceful-command",
+      state: commandOk ? "requested" : "unknown",
+      terminationConfirmed: false,
+      valuesRedacted: true,
+    } : null,
     wrapper: buildWebObserveWrapperForObserveOptions(stopCommand ? "stop" : "command", options, spec.workspace, { commandType: type }),
     stdoutJson: commandResolution.diagnostics,
     result: compactCommandResult(result),
@@ -1143,9 +1161,13 @@ export function runNodeWebProbeObserveForceStop(
   ].join("\n"), 55);
   const forceResolution = resolveWebObserveActionJson(killResult, "force-stop");
   const forcePayload = forceResolution.parsed;
+  const cleanupConfirmed = killResult.exitCode === 0
+    && forcePayload !== null
+    && forcePayload.ok !== false
+    && forcePayload.aliveAfter !== true;
   const payloadResult = {
-    ok: killResult.exitCode === 0 && forcePayload !== null && forcePayload.ok !== false,
-    status: killResult.exitCode === 0 && forcePayload !== null && forcePayload.ok !== false ? "forced-stopped" : "blocked",
+    ok: cleanupConfirmed,
+    status: cleanupConfirmed ? "forced-stopped" : "blocked",
     command: webObserveCommandLabel("stop", options),
     id: webObserveIdFromOptions(options),
     node: options.node,
@@ -1156,6 +1178,16 @@ export function runNodeWebProbeObserveForceStop(
     observer: forcePayload,
     wrapper: buildWebObserveWrapperForObserveOptions("stop", options, spec.workspace, { commandType: "stop" }),
     forceReason: reason,
+    cleanup: {
+      attempted: true,
+      mode: "force-stop",
+      state: cleanupConfirmed ? "confirmed" : "unknown",
+      terminationConfirmed: cleanupConfirmed,
+      processAliveAfter: forcePayload?.aliveAfter ?? null,
+      transportExitCode: killResult.exitCode,
+      reason,
+      valuesRedacted: true,
+    },
     preflightObserver: preflightStatus,
     preflightResult: preflightResult === null ? null : compactCommandResult(preflightResult),
     gracefulResult: gracefulResult === null ? null : compactCommandResult(gracefulResult),