Borrowing it
Nothing to install: this file belongs to Ailian0206/mcp-guardian. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Ailian0206/mcp-guardian/main/.claude/skills/pr-review/SKILL.mdgit clone --depth 1 https://github.com/Ailian0206/mcp-guardianWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ailian0206/mcp-guardian/pr-review)<a href="https://agentmods.dev/skills/ailian0206/mcp-guardian/pr-review"><img src="https://agentmods.dev/badge/skills/ailian0206/mcp-guardian/pr-review/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ailian0206/mcp-guardian/pr-review"><img src="https://agentmods.dev/badge/skills/ailian0206/mcp-guardian/pr-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00046 | $0.00901 |
| Opus 5 | $0.00023 | $0.00451 |
| Sonnet 5 | $0.00009 | $0.00180 |
| Haiku 4.5 | $0.00005 | $0.00090 |
Grade A, and why
pr-review scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
PR 独立只读审核（MCP Guardian）
替代 Cursor Bugbot。只发现和报告问题；修复由开发 agent 完成。
成本红线（最高优先级）
- 每个 PR 只审一次。评论里已有任意
CLAUDE_REVIEWED_SHA，或已有claude-reviewed/claude-changes-requested→ 立即退出，不发新评论、不改标签、不读 diff。 - 禁止因 head 前进、修复 push、pr-gate 重跑而复审。
- 禁止并行启动第二个
/pr-review（同一 PR）。 - 禁止扫描「所有缺 marker 的 PR」并批量审核；一次调用只处理用户指定的那一个开放 PR（普通模式若有多个开放 PR，只审编号最小的一个，且若它已审过则退出）。
- 优先
gh pr diff；高风险文件按需用 Contents API，禁止无目的整仓拉取。
调用模式
/pr-review
/pr-review --trusted-base <PR编号>
- 普通：当前工作区；未改审核协议 skill/规则时用这个。
- 可信基线：仅当 diff 命中
.claude/skills/pr-review/**或.cursor/rules/pr-review-gate.mdc时使用。
代码只读硬边界
允许：gh pr list/view/diff、gh api、Read、Grep、只读验证。
禁止：改 tracked 文件、commit/push、开/关/合 PR、checkout 目标 head、在 trusted-base 执行目标分支代码、直接修 finding。
审核状态协议
Summary 结尾：
<!-- CLAUDE_REVIEWED_SHA: <head-sha> -->
claude-reviewed：本次（也是本 PR 唯一一次）审核完成。claude-changes-requested：存在未解决 CRITICAL/HIGH。
幂等：本 PR 任意历史 marker / 上述标签已存在 → 跳过（不要求 marker 等于当前 head）。
只有本审核器可维护这两个标签。
审核协议路径（才强制 trusted-base）
.claude/skills/pr-review/**.cursor/rules/pr-review-gate.mdc
普通模式若命中上述路径：零 GitHub 写入退出，提示开发 agent 用 trusted-base。
注意：改 AGENT.md / playbook 文案 不再强制 trusted-base（避免无意义烧额度）。
普通模式
gh pr list --state open ...；取编号最小的一个开放 PR。- 若已审过（marker 或标签）→ 退出。
- 命中协议路径 → 退出并要求 trusted-base。
- 否则进入共同审核过程（一次）。
可信基线模式
只审参数指定的一个 PR。校验 OPEN、baseRefOid、detached HEAD=baseRefOid。
已审过 → 立即退出。
读目标：只用 gh pr diff + 必要的 Contents API。
共同审核过程
- 读完整
gh pr diff。 - 策略/Gateway/审批等高风险点按需读全文。
- 等级：CRITICAL/HIGH 阻塞；MEDIUM/LOW 记录。
- 必查：密钥、路径穿越、fail-open、审批绕过、审计、ownership、吞错、无界查询、缺测。
- inline + 一条 summary + marker；设标签；立即退出，不轮询、不复审。
项目约束
- Draft 也审（仍只一次）。
- 忽略无关
.worktrees/。
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 82 lines · 46 tokens per session scan A abf3c6617c82
pr-review is a skill published in the GitHub repository Ailian0206/mcp-guardian (1 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 901 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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