fishbone-diagram

A tool for creating Fishbone, also called Ishikawa or cause-and-effect, diagrams to investigate why a problem happened. It groups possible causes, explores sub-causes, helps prioritize them, and can connect with the 5 Whys method.

In plain words
What is it for?
Use it for root-cause analysis, defect or failure investigations, quality improvement, and team problem-solving. It can generate visual SVG diagrams and HTML reports.
Why use it?
It gives teams a repeatable way to brainstorm causes without overlooking major categories. The resulting diagram and report make the investigation easier to review.

Plugin for Claude Code

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.

Claude Code
/plugin marketplace add ddunnock/claude-plugins
agentmods
npx agentmods add plugins/ddunnock/claude-plugins/fishbone-diagram
Clone the repo
git clone --depth 1 https://github.com/ddunnock/claude-plugins

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

fishbone-diagram 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 2d 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.

skills/fishbone-diagram/.claude-plugin/plugin.json · 18 lines

What it actually says

{
  "name": "fishbone-diagram",
  "description": "Create comprehensive Fishbone (Ishikawa/Cause-and-Effect) diagrams for structured root cause brainstorming. Guides teams through problem definition, category selection (6Ms, 8Ps, 4Ss, or custom), cause identification, sub-cause drilling, prioritization via multi-voting, and 5 Whys integration. Generates visual SVG diagrams and professional HTML reports. Use when brainstorming potential causes, conducting root cause analysis, facilitating quality improvement sessions, analyzing defects or failures, structuring team problem-solving, or when user mentions \"fishbone\", \"Ishikawa\", \"cause and effect diagram\", \"6Ms\", \"cause analysis\", or \"brainstorming causes\".",
  "version": "1.0.1",
  "author": {
    "name": "dunnock"
  },
  "keywords": [
    "fishbone",
    "ishikawa",
    "cause-effect",
    "6ms",
    "brainstorming",
    "root-cause",
    "quality"
  ]
}
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. 2d ago First seen · 18 lines scan A 193f963ac0ae

Subscribe to this mod's changes

fishbone-diagram is a plugin published in the GitHub repository ddunnock/claude-plugins (12 stars, last pushed 5mo ago), 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 2026-08-30.