[MistEO]

同一实例收到 Stop 后立即开始下一轮，旧 pretask 还没轮询到停止标记，下一轮的 reset 就会清除它，旧子进程因此继续运行。现在每轮等待者持有自己的取消接收端，reset 开放下一轮时保留旧等待者的停止状态。

已置 Stop 的 pretask 会在创建进程前返回取消。受管 pretask 在取消后等待直接子进程退出，再完成本次调用。等待型前置程序继续只取消等待，允许该程序自行结束。桌面和 Web 入口共用取消注册表。

独立 review 未发现阻塞问题。基于最新 main c321532，与 #434 head 21494a8 对照。可复跑回归位于 tests/pretask，执行生产命令代码和有时限的真实子进程：

• python tests/pretask/run.py --offline：7 个进程断言和 2 个注册表单测通过。同一回归在 main 上 3 项通过、4 项失败，复现 Stop/reset 丢取消、返回时未等子进程退出、已停止仍启动和前置程序等待丢取消。
• Rust 库测试：91 passed、1 ignored、4 个更新测试排除。本机直接启动测试 EXE 有基线同样存在的 0xc0000139，为临时测试 EXE 副本嵌入 Common Controls v6 manifest 后执行，未修改应用配置。
• cargo fmt --check、独立测试源 rustfmt 和 git diff --check 通过。

Stop 请求表示已登记取消，跨客户端的新调用可能与旧进程退出短暂重叠。测试不覆盖任意孙进程树、Tauri/HTTP 传输或真实项目进程。

Sourcery 摘要

在重置期间保留每次运行的预任务取消状态，并确保托管预操作和用户配置的预操作具有一致的取消完成行为。

Bug 修复：

• 当新运行重置同一实例时，保留正在执行的预任务的取消状态，防止已取消的子进程继续运行。
• 在启动前拒绝已取消的预任务，并确保托管预任务在取消完成前退出。
• 用户配置的预操作取消仅中断等待过程，允许程序独立完成。

增强功能：

• 在桌面端和 Web 端的停止入口之间共享实例级取消注册表。

文档：

• 为独立的预任务取消回归测试工具及其支持的执行模式添加文档。

测试：

• 使用真实子进程添加回归测试，覆盖停止与重置竞态、启动前取消、进程退出顺序、实例隔离、重置行为，以及仅中断等待的预操作取消。

Original summary in English

Summary by Sourcery

Preserve per-run pretask cancellation across resets and make cancellation completion consistent for managed and user-configured pre-actions.

Bug Fixes:

• Preserve cancellation state for in-flight pretasks when a new run resets the same instance, preventing canceled child processes from continuing.
• Reject already-canceled pretasks before spawning and ensure managed pretasks exit before cancellation completes.
• Keep user-configured pre-action cancellation limited to interrupting the wait while allowing the program to finish independently.

Enhancements:

• Share the per-instance cancellation registry across desktop and Web stop entry points.

Documentation:

• Add documentation for the standalone pretask cancellation regression harness and its supported execution modes.

Tests:

• Add regression coverage using real child processes for stop/reset races, pre-spawn cancellation, process-exit ordering, instance isolation, reset behavior, and wait-only pre-action cancellation.

AI 使用信息：

• Agent：Codex
• 模型：gpt-6-astra（实现与内部复审），gpt-6.1-sol（额外交叉审查）
• 思考强度：ultra（实现与内部复审），max（额外交叉审查）

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[chatgpt-codex-connector]

Codex Review Summary: ✅ Completed

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-11-11T08:44:34.551551Z	2d2aad1	Draft marked ready

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