Ling: Agent for Claude Code

.agents/agents/debugger.md

debugger is an agent for Claude Code from MisonL/Ling. It costs 52 tokens per session (1,835 once invoked), scanned A, original, MIT.

A debugging agent that investigates bugs, crashes, production incidents, performance problems, and other errors in a step-by-step way.

In plain words
What is it for?
Use it to reproduce failures, narrow them to a component, understand why they happen, fix the underlying issue, and add tests to prevent regressions.
Why use it?
It replaces guesswork with reproduction, evidence gathering, isolation of the failing part, and root-cause analysis. Root-cause analysis means finding the underlying reason a problem occurs, not just hiding its symptoms.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: installed under .agents/ (shared by several agents).

This is MisonL/Ling's own configuration. It tells Claude Code how to work on Ling itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Ling configures →

Reuse

Borrowing it

Nothing to install: this file belongs to MisonL/Ling. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/MisonL/Ling/main/.agents/agents/debugger.md
Clone the repo
git clone --depth 1 https://github.com/MisonL/Ling

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 debugger

README.md
[![agentmods](https://agentmods.dev/badge/agents/misonl/ling/debugger/github.svg)](https://agentmods.dev/agents/misonl/ling/debugger)
Your own site
<a href="https://agentmods.dev/agents/misonl/ling/debugger"><img src="https://agentmods.dev/badge/agents/misonl/ling/debugger/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.

agentmods 80×15 button for debugger

Your own site · 80×15
<a href="https://agentmods.dev/agents/misonl/ling/debugger"><img src="https://agentmods.dev/badge/agents/misonl/ling/debugger.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,835 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 $0.00052 $0.01835
Opus 5.5 $0.00021 $0.00734
Sonnet 5.5 $0.00010 $0.00367
Haiku 4.5 $0.00005 $0.00184

Measured 1mo ago against content hash 029d104b1327, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

debugger 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 1mo 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.

.agents/agents/debugger.md · 226 lines

How it starts

The opening of the file, as written. The whole thing — 226 lines — stays where its author put it; the contents beside it link to each section on GitHub.

调试专家(Debugger)- 根因分析(Root Cause Analysis)

核心哲学

“不要猜测。要系统化调查。修复根本原因,而非表面症状。”

你的心态

  • 复现优先:看不见,就修不了
  • 基于证据:遵循数据,而非假设
  • 根因导向:症状往往掩盖真实问题
  • 一次只改一处:同时进行多项变更会导致混乱
  • 防止回归:每一个 Bug 都需要一个对应测试

4 阶段调试流程

+-------------------------------------------------------------+
|  阶段 1:复现                                               |
|  - 获取确切的复现步骤                                       |
|  - 确定复现频率(100%?间歇性?)                            |
|  - 记录预期行为与实际行为                                   |
+---------------------------+---------------------------------+
                            |
                            v
+-------------------------------------------------------------+
|  阶段 2:隔离                                                |
|  - 故障是什么时候开始的?最近有哪些变更?                   |
|  - 哪个组件应为此负责?                                     |
|  - 创建最小复现案例                                          |
+---------------------------+---------------------------------+
                            |
                            v
+-------------------------------------------------------------+
|  阶段 3:理解(根因)                                        |
|  - 应用 “5 Whys” 技术                                       |
|  - 追踪数据流                                                |
|  - 识别真正的 Bug,而非表面症状                              |
+---------------------------+---------------------------------+
                            |
                            v
+-------------------------------------------------------------+
|  阶段 4:修复与验证                                          |
|  - 修复根本原因                                              |
|  - 验证修复是否生效                                          |
|  - 添加回归测试                                              |
|  - 检查是否存在类似问题                                      |
+-------------------------------------------------------------+

Bug 分类与调查策略

按错误类型划分

错误类型 调查方法
Runtime Error(运行时错误) 阅读堆栈追踪,检查类型与空值
Logic Bug(逻辑错误) 追踪数据流,对比预期与实际输出
Performance(性能问题) 先 Profile(性能分析),再优化
Intermittent(间歇性) 寻找竞争条件或时序问题
Memory Leak(内存泄漏) 检查事件监听器、闭包与缓存

Read the full file on GitHub · 226 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. 1mo ago First seen · 226 lines · 52 tokens per session scan A 029d104b1327

Subscribe to this mod's changes

debugger is an agent published in the GitHub repository MisonL/Ling (8 stars, last pushed 7mo ago), licensed MIT. It adds 52 tokens to every session and 1,835 once invoked, about $0.0002 per session on Opus 5.5. 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.

Related

Other agents, from other repositories

review-obsidian-guidelines

Reviews a diff of obsidian-reminder against Obsidian's community plugin guidelines and directory review rules that ESLint does not already enforce — manifest metadata, command naming, settings UI, styling, mobile compatibility, vault access APIs. Used by the pr-review workflow; read-only.

uphy/obsidian-reminder · 63 tokens

debugger

Diagnoses and fixes failed modules using root-cause analysis, not guessing.

TT-Wang/forge · 17 tokens

debugger

Investigate errors systematically to find root cause before attempting fixes. Gathers evidence, analyzes patterns, and forms testable hypotheses.

bostonaholic/rpikit · 28 tokens

loom-advisor

Read-only advisory agent for debugging and repeated failures. Spawned instead of a blind retry when an implementer has failed twice on the same task, or a bug resists straightforward diagnosis. Returns a root-cause diagnosis plus one concrete next step.

cosmix/loom · 53 tokens

evolve-retrospective

Failure post-mortem agent for the Evolve Loop. Fires only on Auditor FAIL or WARN verdicts. Reads cycle artifacts and produces a structured retrospective + failure-lesson YAML files. READ-ONLY outside the lessons directory.

mickeyyaya/evolve-loop · 51 tokens

type-reconstructor

Dedicated struct/class reconstruction from IDA Pro decompiled binaries. Scans every function for memory access patterns, merges evidence across the module, resolves vtable and COM interface layouts, and generates compilable C++ header files with per-field confidence annotations. Use for full-module or single-class…

marcosd4h/DeepExtractRuntime · 63 tokens