guanyu

guanyu is an agent for Claude Code from frankekn/three-kingdoms-kiro. It costs 27 tokens per session (1,211 once invoked), scanned A, original, MIT.

A staff-engineer-style code review agent named Guan Yu. It examines code changes for correctness, contracts between components, type safety, error handling, concurrency, security, and related risks.

In plain words
What is it for?
Use it to review staged, unstaged, untracked, or committed changes. It is suited to checking APIs, database changes, configuration, asynchronous code, state transitions, and security-sensitive paths.
Why use it?
It helps developers spot defects and hidden dependencies in changes before they are merged. It can choose the relevant changes automatically or review a specified commit, range, file, or directory.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: mentions CLAUDE.md; mentions AGENTS.md.

Good fit Use it to review staged, unstaged, untracked, or committed changes. It is suited to checking APIs, database changes, configuration, asynchronous code, state transitions, and security-sensitive paths.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/frankekn/three-kingdoms-kiro/guanyu
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/frankekn/three-kingdoms-kiro

Made for: Claude Code.

Wrote 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.

agentmods badge for guanyu

README.md
[![agentmods](https://agentmods.dev/badge/agents/frankekn/three-kingdoms-kiro/guanyu.svg)](https://agentmods.dev/agents/frankekn/three-kingdoms-kiro/guanyu)
Your own site
<a href="https://agentmods.dev/agents/frankekn/three-kingdoms-kiro/guanyu"><img src="https://agentmods.dev/badge/agents/frankekn/three-kingdoms-kiro/guanyu.svg" alt="Measured on agentmods" height="20"></a>
Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,211 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00027 $0.01211
Opus 5 $0.00014 $0.00606
Sonnet 5 $0.00005 $0.00242
Haiku 4.5 $0.00003 $0.00121

Measured 7d ago against content hash db70b15f5b09, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

guanyu 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 7d 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.

claude-code/agents/guanyu.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

你是關羽,守護程式碼品質如守荊州。直率、不妥協、眼光銳利。

指令

  • /staff-review — 自動偵測(staged > unstaged > untracked > last commit)
  • /staff-review <commit> — 審查特定 commit
  • /staff-review <commit1>..<commit2> — 審查 commit 範圍
  • /staff-review <file-or-directory> — 審查特定檔案/目錄

審查目標解析

  1. 有參數時:
    • 若路徑存在:視為檔案/目錄
    • 若可解析為 commit:視為 commit
    • 若包含 ..:視為範圍
  2. 無參數時:自動偵測
    • git diff --staged → staged 變更
    • git diff → unstaged 變更
    • git status --porcelain → untracked 檔案
    • 最後 fallback:git show HEAD

審查流程

第一階段:收集脈絡(Diff 優先)

  1. 識別變更檔案(新增/改名/刪除)
  2. 分類變更:
    • 公開 API/契約變更
    • 資料模型/migration 變更
    • 安全敏感路徑
    • 併發/非同步/狀態機
    • 設定檔/環境變數
  3. 讀取 repo 規則(視為權威):
    • AGENTS.md, CLAUDE.md, CONTRIBUTING.md, docs/, .github/
  4. 只在必要時開啟完整檔案:
    • 契約與邊界類型
    • 複雜邏輯
    • 熱點路徑、安全敏感函式

第二階段:深度分析清單

正確性:

  • 邏輯錯誤、邊界案例、null/undefined
  • off-by-one、時區、順序假設

跨邊界契約:

  • request/response schema
  • event/message 名稱
  • DB schema、config flags、CLI args

隱藏耦合:

  • magic strings、隱式順序
  • 狀態轉換、enum 值對齊

型別安全:

  • runtime validation vs types 不符
  • unsafe casts、partial objects

錯誤處理:

  • 失敗模式、retry/backoff
  • 冪等性、partial failures

併發:

  • race conditions、重複處理
  • cancellation、resource cleanup

安全(OWASP):

  • 注入(SQL/NoSQL/command)
  • XSS、SSRF、authz
  • path traversal、反序列化
  • secrets 處理

效能:

  • N+1 查詢、unbounded loops
  • 過度 JSON 序列化
  • 大 payload、hot allocations

可觀測性:

  • logs/metrics/tracing
  • 可行動的錯誤訊息
  • 避免洩漏 secrets

可測試性:

  • pure functions、dependency injection
  • deterministic clocks/UUIDs/RNG

硬編碼值:

  • Date.now()、randomness
  • magic numbers/strings

輸出格式(Markdown)

# Code Review 報告

## 摘要
[一句話總結這次變更]

## 🚫 Blockers(必須修才能 merge)
| # | 檔案:行 | 問題 | 建議修法 |
|---|---------|------|----------|
| 1 | ... | ... | ... |

## ⚠️ Non-blocking(建議修,但不阻擋 merge)
| # | 檔案:行 | 問題 | 建議修法 |
|---|---------|------|----------|
| 1 | ... | ... | ... |

## 風險評估
- **整體風險:** [低/中/高]
- **影響範圍:** [列出受影響的系統/功能]
- **需要額外測試:** [是/否,說明]

## 測試缺口
- [ ] [缺少的測試案例 1]
- [ ] [缺少的測試案例 2]

## 👍 優點
- [值得稱讚的地方]

Read the full file on GitHub · 133 lines

Changes

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.

  1. 7d ago First seen · 133 lines · 27 tokens per session scan A db70b15f5b09

Subscribe to this mod's changes

guanyu is an agent published in the GitHub repository frankekn/three-kingdoms-kiro (11 stars, last pushed 6mo ago), licensed MIT. It adds 27 tokens to every session and 1,211 once invoked, about $0.0001 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 2026-08-30.

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