[huangruiteng]

Goal and delivered behavior

Large GitHub comparisons can make a newer runtime look unverified: the updater's bounded metadata reader also downloads the first page's changed-file patches. Keep the existing metadata limit and request one later comparison page, which preserves the relation without that file list.

No written specification; the reproduced failure and GitHub's comparison pagination contract are the basis. The existing installation provider owns this bootstrap I/O; no new capability, permission, configuration or TypeScript decision owner is introduced.

Written by: model_agent — OpenAI Codex (GPT-6 family).

Criterion	Disposition	Evidence
Resolve lineage without unneeded patches	implemented	target_direction; real loopback HTTP cases for ahead, behind and diverged
Keep unknown targets and older targets protected	implemented	unavailable/invalid responses stay unknown; metadata limit and identical fast path retained
Keep standalone bootstrap usable	implemented	existing exported-bootstrap and installer coverage

Validation

Tested head: 965469acd. Source changes are complete; independent review and merge remain separate.

• Five affected modules: 115 passed, 3 skipped. New relation cases failed on the unchanged baseline, then passed; the negative control passed before and after. Skipped cases are not counted as verified.
• Standard premerge after installing the repository's required development dependencies: 6 direct + 10 selected checks passed. The first run failed because TypeScript dependencies were absent; that environment failure is retained.
• Changed-file Ruff, whitespace, bilingual-diff and public-boundary checks passed.
• Read-only requests to the same public immutable comparison returned the same forward relation with 514,657 → 14,140 response bytes. The reverse comparison remained behind. This is transport evidence, not installed-host or long-horizon benefit.
• Existing checksum, signature, metadata-size, downgrade and activation checks are unchanged.

Scope is complete for this bootstrap read. Bounded refactoring: kept the existing transport owner; no additional abstraction is needed. UI impact: none. No App installation, model execution, CI polling, approval or merge is performed by this proposal.

[loopx-agent]

Reviewer: model_agent; model=gpt-6.1-sol; provider=OpenAI; reasoning_effort=max; runtime_reported; observation_id=538b775caf684feb0505d4f4aa3a6cec7dba5f5e6596e7c8a4e473752000e880

Exact head 965469acd13c602c8777907cf5343388e7666f5c；review base/merge base 477df45d9036414a4a7f5a558ef2ef1e38e08c75。没有发现本 PR 的阻断问题。

动机 / Motivation

通过 runtime 快照检查更新的操作者，以及尚未安装 LoopX 时运行独立 bootstrap 的用户。 GitHub comparison 的第一页包含文件 patch；当差异较大，256 KiB 的 metadata 上限会把本来更新的目标识别为 unknown，用户被错误地要求手动检查血缘或放行。 改为读取每页一个 commit 的第二页，保留比较关系且避开第一页文件列表；真实 HTTP 与独立 bootstrap 能确认 ahead，behind、diverged、无效和超限响应仍被拒绝。 范围仅限更新血缘的 metadata 读取；不提高大小限制，不新增配置或权限，不执行真实宿主安装、升级或激活。

改动思路 / Approach

这是安装 provider 的 bootstrap IO，必须能在 LoopX/Node 尚未可用时独立运行；沿用现有 Python transport 和血缘判断，不新增 TypeScript 决策 owner。 当前边界只改善目标血缘解析并保留原下载/校验/降级策略；独立入口到故意损坏归档的校验拒绝已验证，真实安装与激活不在本次执行范围。 No change reproduces false unknown. Raising256KiB limit would download irrelevant patches and weaken existing cap; parsing after full transfer does not save bytes. Existing provider needs only one paginated URL change. 正向路径与拒绝分支沿用已有公开入口，author 的测试声明没有替代本轮执行。没有新增人工准备、复制或确认轮次；原本需要明确授权的动作仍由既有 owner 决定。

具体改动 / Changes

全部2个文件 +38/-1：生产改动是 comparison URL 的 per_page=1&page=2 及原因注释，测试新增真实 HTTP 三种 relation 和原 cap 的负例。没有改变 metadata cap、TLS/credential 来源规则、checksum、签名、owner、downgrade 或 activation 检查。没有已接受的书面 repository specification；依据是重现缺陷、独立入口对照和 GitHub 官方 comparison pagination 文档，未虚构 RFC 验收。

GitHub primary API contract 说明分页的文件列表仅在第一页返回；本轮另外读取不可变 forward/reverse comparison 验证 page2 在 commits=[] 时仍携带 ahead/behind。forward 为19518→10620 bytes，reverse 为9933→9922 bytes，均未在第二页返回 files。没有沿用作者其他比较的字节数作为本轮实测。

关键代码讲解

target_direction：保持 identical 快路径、SHA 校验和 unknown 回退，只把 comparison 请求改到第二页，血缘仍由原四值 allowlist 判断。

read_json：原有 bounded reader 保留256 KiB上限、credential-free URL 和规范化错误；读取 MAX_MANIFEST+1 后才解析 JSON，超限绝不放行。

main：沿已安装 source 与 manifest 解析目标；只有 ahead/identical 可以进入下载，其余关系走原降级保护，本次实际在 integrity guard 停止。

对主干的风险 / Risks

五个相关模块在 base111 PASS/3 SKIP，head115 PASS/3 SKIP；三个 skip 未改称通过。独立导出的 bootstrap 在 python -I 下执行原 main，只有 URL transport 重定向到真实 loopback HTTP，未导入 LoopX。相同7种状态 base6 PASS/1 ahead FAIL，head7 PASS。ahead/identical 进入真实下载后被故意错误归档触发 integrity_mismatch，before installer 拒绝；behind/diverged/unexpected/overcap/HTTP503 在下载前拒绝。相同 SHA 不发 comparison。标准 premerge 6 direct +10 selected PASS、0 failure/hold。

page2 的单个 commit metadata 仍可能超限或 unavailable，当前继续 unknown，不能声称任意 comparison 都有恒定大小。metadata 上限保持256 KiB；此修复也不把 GitHub 可达或元数据存在当成安装许可。作者所说整体实际升级未由本轮执行；这里用真正的校验失败终止下载路径，保证 installer 不执行。最初 reviewer oracle 使用 checksum/digest 的非正式字词，但原 guard 返回 integrity_mismatch；纠正为已有正式诊断后冻结同一 base/head 脚本，保留该失败。

CI 按 wait_for_ci=false 未查询、轮询或等待。实际 PR merge base 是 477df45d9036414a4a7f5a558ef2ef1e38e08c75，目标 main 的快照为 5f1a9d78ba7aca48ae2203425b252b6882ba3c15；diff 与 premerge 使用前者，未把 main 的其他提交混入本 PR。

我的整体评价 / Verdict

交付判断 goal_achieved，long_horizon 与 user_experience 在本次可验证边界内 improved：解除已重现的错误拒绝，保留合法恢复与失败保护。这是安装 provider 的 bootstrap IO，必须能在 LoopX/Node 尚未可用时独立运行；沿用现有 Python transport 和血缘判断，不新增 TypeScript 决策 owner。 当前边界只改善目标血缘解析并保留原下载/校验/降级策略；独立入口到故意损坏归档的校验拒绝已验证，真实安装与激活不在本次执行范围。 scope fit 与改动成本相称，未发现需要在本 PR 扩大重构的相邻 owner。没有新增 UI、renderer 或页面内容；检查路径为更新计划和独立 bootstrap 的 HTTP metadata 读取，visual review 不适用。 未执行真实宿主安装、升级、激活或模型调用；第二页单个 commit metadata 本身仍可能超过上限，此时明确保持 unknown。3 个平台相关 skip 不算通过。 现有 review/required validation、平台 readiness 与 merge 授权仍分别判断，本轮不 merge。

English verdict: APPROVE. At 965469acd13c602c8777907cf5343388e7666f5c, the same public-entry baseline/head differential demonstrates the bounded fix while negative authority/integrity and retry controls remain intact. Installed-host/model adoption is unverified; local required checks pass.