root-cause-finder

root-cause-finder is an agent for Claude Code from DennisLiuCk/claude-plugin-marketplace. It costs 111 tokens per session (6,836 once invoked), scanned A, original, no licence file.

A debugging agent that tests possible explanations for a software problem and works toward confirming the actual root cause.

In plain words
What is it for?
Use it to check whether a suspected cause is real, understand how a bug occurs, and trace a problem through the code.
Why use it?
It helps prevent fixing only the visible symptom or stopping at an unverified guess.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the issue-review plugin — 1 skill, 2 commands, 5 agents shipped together

Good fit Use it to check whether a suspected cause is real, understand how a bug occurs, and trace a problem through the code.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/dennisliuck/claude-plugin-marketplace/root-cause-finder
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/DennisLiuCk/claude-plugin-marketplace

Made for: Claude Code.

Or install issue-review, the plugin that ships this one along with the rest of its 1 skill, 2 commands, 5 agents.

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 root-cause-finder

README.md
[![agentmods](https://agentmods.dev/badge/agents/dennisliuck/claude-plugin-marketplace/root-cause-finder/github.svg)](https://agentmods.dev/agents/dennisliuck/claude-plugin-marketplace/root-cause-finder)
Your own site
<a href="https://agentmods.dev/agents/dennisliuck/claude-plugin-marketplace/root-cause-finder"><img src="https://agentmods.dev/badge/agents/dennisliuck/claude-plugin-marketplace/root-cause-finder/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 root-cause-finder

Your own site · 80×15
<a href="https://agentmods.dev/agents/dennisliuck/claude-plugin-marketplace/root-cause-finder"><img src="https://agentmods.dev/badge/agents/dennisliuck/claude-plugin-marketplace/root-cause-finder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 111 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 6,836 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00111 $0.06836
Opus 5.5 $0.00044 $0.02734
Sonnet 5.5 $0.00022 $0.01367
Haiku 4.5 $0.00011 $0.00684

Measured 1mo ago against content hash bfe7dfb87e87, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

root-cause-finder scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

const response = await fetch(url); // 沒有 timeout
plugins/issue-review/agents/root-cause-finder.md · 755 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 755 lines · 111 tokens per session scan A bfe7dfb87e87

Subscribe to this mod's changes

root-cause-finder is an agent published in the GitHub repository DennisLiuCk/claude-plugin-marketplace (27 stars, last pushed 7mo ago), with no licence file. It adds 111 tokens to every session and 6,836 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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