[BigDataDZ]

Goal And Delivered Outcome

• Outcome basis: reproduced failure in the existing contributor installation guidance.
• Goal/source and gap: loopx doctor uses local_install_command to print checkout repair commands. The POSIX branch concatenates an unquoted installer path: a checkout under Loop X becomes two shell words, and an apostrophe produces a syntax error.
• Before → after: the same eight focused cases fail six times on the unchanged base, with the two ordinary-path controls passing; all eight pass after quoting the existing executable token. Both normal and skill-opt-out commands still reach the owned installer.
• Intended base: main; no broader installation issue is claimed closed.

Author Declaration

• Written by: model_agent — OpenAI Codex, GPT-6 family.
• Specification and revision: existing loopx/install_contract.py::local_install_command and its doctor consumers at 12803354ab13a003de8620ab496250617224ff37; existing host-specific rendering and LOOPX_INSTALL_SKILL=0 compatibility are the contract.

Criterion	Disposition	Symbol / path	Evidence
Preserve the selected installer as one POSIX executable word	implemented	local_install_command	Real Bash execution of the shipped installer help path, ordinary/spaced/apostrophe-and-dollar paths
Preserve skill opt-out and Windows rendering	implemented	same existing owner	Both opt-out values in new tests; existing platform suites

• Self-check: read the complete diff and the doctor call sites; checked related PRs before implementation. Tests precede the fix. Product change is one existing Python shell-rendering line; it introduces no control-plane decision owner.

Scope And Continuation

• Complete within this scope. Reuses the module's existing shlex dependency rather than adding a quoting abstraction. The bounded future-facing pass found no additional abstraction necessary for this token.
• No new vocabulary, activation switch, authority, or persisted state. Existing Windows behavior remains covered by the same suite.

Validation

• Tested revision: current PR head; same tests were run against the unchanged base before the production edit.
• Run state: finished. Input classes: synthetic and public_fixture.

Check kind	Result	Evidence / limitation
regression_parity	passed	Eight focused cases: base 6 failed / 2 passed; head passes. The initial Windows-path harness attempt was corrected to use POSIX-shaped paths before this comparison.
real_entrypoint	passed	Actual Bash executes a disposable copy of shipped scripts/install-local.sh --help for six path/opt-out combinations. No installation, download or user configuration write is performed.
unit	passed	python -m pytest -q tests/test_install_hint_platform.py tests/test_python_install_owner_platform.py tests/test_onboarding_command_platform.py: 52 passed, 1 existing platform skip.
static	passed	Focused Ruff, semantic advisory (no supported new vocabulary), staged bilingual RFC check, whitespace and public-boundary review.
integration	not_run	Full installation and native Linux/macOS execution were not run; Bash evidence is Git Bash on Windows. Full repository CI remains separate.

Frontend / Visual Evidence

Not applicable: no rendered UI, first-screen presentation or new caller capability. Existing doctor command guidance is corrected in its current owner; no settings editor or Lark companion operation is introduced.

[loopx-agent]

Reviewer: model_agent; model=gpt-6.1-sol; provider=OpenAI; reasoning_effort=max; declaration_source=runtime_reported; execution_observation_id=27fbaa154dc58cf6c39f08cbecc6542890c378cc5e3cdc446b14ac23890a9b09

未发现阻塞性代码问题。最强反例与回归敏感性已经由同一输入的基线/head 真实执行覆盖。

动机 / Motivation

在源码 checkout 中按 doctor 建议修复安装的 POSIX 用户。例如 checkout 路径包含空格或撇号时，旧命令被 shell 拆分或解释，复制后无法启动正确的安装器；修复后整条路径作为一个可执行文件参数传入。独立实测普通路径与六类特殊路径、两种 skill 安装选项，在 sh、bash、zsh 和真实安装脚本的 --help 入口共 56 个组合均保持正确目标、参数和环境变量。本 PR 不改变 Windows 安装策略、安装权限、技能归属或自动执行行为，也不证明真实用户已完成升级。

改动思路 / Approach

修复属于现有安装命令生成 owner，标准库引用即可恢复一个路径一个 token 的不变量；没有新增配置、并行决策 owner 或安装机制。当前 PR 完成 POSIX checkout 修复命令的字面路径调用和回归覆盖；实际安装授权、Windows 原生运行与用户升级结果仍由各自 owner 验证。

正向流程是 doctor 根据已有 skill 归属生成 contributor 命令，用户授权执行后 shell 把路径交给同一个安装脚本；没有增加问答或确认轮次。对普通 checkout，不需要改变任何操作。负向流程用带撇号、美元符号、分号和换行的临时目录实际执行，而不是只用字符串断言或 shlex.split 证明正确。 搜索基线和 exact head 的定义及相邻 caller 后，没有发现需要保留的第二套决策规则。采用仓库经验建议中的真实任务、恢复和 readback 检查；通用 recovery RFC 与长期收益研究不被升级为本修复的新强制验收门。该边界无需额外图示，源代码与执行对照足以说明分支。

具体改动 / Changes

生产改动只有 loopx/install_contract.py:98 的一行替换，测试文件增加 42 行、删除 1 行；沿用现成 shlex import，没有新模块、schema、状态或 CLI 参数。先读了基线安装指南的 owner/activation 边界和 install_contract 模块契约，再读 diff。未找到为路径引用单独写定的正式验收规格，spec_basis=no_spec；该结论来自实际故障对照，不把作者自述或测试内容伪装成既有规范。安装指南的只读建议和执行授权边界继续有效。

关键代码讲解

1. local_install_command 的平台分支保留 Windows 命令与当前解释器绑定，POSIX 在第 98 行引用整个路径，随后仍把 LOOPX_INSTALL_SKILL=0 放在命令之前。这样路径中的分号或美元符号不会成为额外 shell 语法。
2. build_install_freshness继续从 externally managed skills 的事实决定 skip_skills，再在第 303 行复用 helper。它只输出建议，不获得安装、激活或写入 Goal 的权限。独立探针验证了真正生成的 contributor 命令。

新增回归测试执行复制到临时目录的实际 Bash 安装脚本 --help，并补充 token 与环境变量检查。独立审查进一步覆盖三种实际 shell、七类路径和两种选项。基线同输入失败，固定 head 同输入通过；不以新实现自身输出作为唯一预期。

对主干的风险 / Risks

未发现阻塞性代码问题。最强反例与回归敏感性已经由同一输入的基线/head 真实执行覆盖。 相关六文件测试为 95 passed / 13 skipped；Ruff、配置内 mypy（17 个源文件）及原预算串行完整 premerge 均通过。13 项条件跳过不能当作原生 Windows 验证。

首轮两项完整 premerge 并行运行时，安装 smoke 均达到默认超时，保留为 FAIL；未修改基线同预算单独运行 67.34 秒通过，此后两 head 串行完整检查通过。没有提高阈值，也不声称查明了并行超时根因或已获得并行冷构建稳定性资格。 maintainability ratchet 仍报告既有 _admitted_interaction_next_cli_actions 超限：独立基线与 head 的完整失败文本一致，相关函数和规则未改；native gate 将其标为 advisory_inherited_failure，保留该红项而不伪装通过。

本 PR 不改变 Windows 安装策略、安装权限、技能归属或自动执行行为，也不证明真实用户已完成升级。 复用既有平台owner，未增加默认开关、状态分类、权限或自动执行；不需要为局部Python字符串修复另建TypeScript决策内核。

我的整体评价 / Verdict

对 head 19c49792cb32dffd3c3ec21528b18ac12d97020b，problem_context=goal_achieved 仅指该具体现有缺陷修复，change_proportionality=proportionate；代码量与验证均围绕同一真实 caller。long_horizon=preserved：不改变工作状态、调度、配额或权限，也没有量化长期收益；user_experience=improved：既有 doctor 入口可继续完成该恢复/诊断任务，没有新增必需交互轮次。

loopx/install_contract.py 与 tests/test_install_hint_platform.py 仅改变 CLI 恢复命令和测试，没有渲染页面或布局变化，因此 visual_review 为 not_applicable。Windows 原生 PowerShell 执行、实际用户升级和并行冷构建耗时未获本轮验证。 observable_semantics=intentional_change_validated，保留旧缺陷失败和合法控制输入对照。复用标准库与既有owner已是合适的有界简化，额外抽象没有当前收益。原生平台、运行中App和并行构建的未验证范围保持明确；本结论不授予 merge、安装或激活权限，合并资格须另查。

English verdict: APPROVE — 19c4979; no blocking finding; changed-invariant probes and serial repository validation passed, with prior timeouts and inherited ratchet debt retained.