diagnose

diagnose is a plugin for Claude Code from musingfox/cc-plugins. Its manifest loads nothing; the 2 skills it bundles cost 71 tokens per session together, scanned A, original, MIT.

A debugging tool that investigates a confirmed bug cause and leaves one failing test on a separate Git branch without applying the fix. A failing test is a repeatable check that currently demonstrates the problem.

In plain words
What is it for?
Use it to confirm why a bug happens, create a test that exposes it, and hand off the work before implementation of the fix.
Why use it?
It gives the next developer a clear reproduction of the bug while keeping the proposed fix separate. The separate branch also avoids changing the main working copy.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it to confirm why a bug happens, create a test that exposes it, and hand off the work before implementation of the fix.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add musingfox/cc-plugins
/plugin install diagnose
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/musingfox/cc-plugins

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 diagnose

README.md
[![agentmods](https://agentmods.dev/badge/plugins/musingfox/cc-plugins/diagnose/github.svg)](https://agentmods.dev/plugins/musingfox/cc-plugins/diagnose)
Your own site
<a href="https://agentmods.dev/plugins/musingfox/cc-plugins/diagnose"><img src="https://agentmods.dev/badge/plugins/musingfox/cc-plugins/diagnose/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 diagnose

Your own site · 80×15
<a href="https://agentmods.dev/plugins/musingfox/cc-plugins/diagnose"><img src="https://agentmods.dev/badge/plugins/musingfox/cc-plugins/diagnose.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 2 skills cost 71 tokens a session between them.
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.
Security

Grade A, and why

diagnose 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 4d 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.

diagnose/.claude-plugin/plugin.json · 22 lines

What it actually says

{
  "name": "diagnose",
  "description": "Diagnose a confirmed cause of a bug and leave one failing test on a branch to read from, without applying the fix",
  "version": "0.1.4",
  "author": {
    "name": "Nick Huang",
    "email": "[email protected]"
  },
  "keywords": [
    "diagnose",
    "debug",
    "bugs",
    "failing-test",
    "worktree"
  ],
  "homepage": "https://github.com/musingfox/cc-plugins/tree/main/diagnose",
  "license": "MIT",
  "dependencies": [
    "context-flow"
  ]
}
Contents

What it installs

The manifest is a name and a version. 2 skills travel with it, and installing the plugin installs all of them — 71 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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. 4d ago Changed 4cec3ad71094
  2. 10d ago Changed 5316b2dec873
  3. 18d ago Changed f6d418343ffc
  4. 1mo ago Changed de1021772c49
  5. 1mo ago First seen · 22 lines scan A eb77079d9d80

Subscribe to this mod's changes

diagnose is a plugin published in the GitHub repository musingfox/cc-plugins (2 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-11.