d2-diagrams

d2-diagrams is a plugin for Claude Code from denisraison/claude-plugins. Its manifest loads nothing; the 1 skill it bundles cost 63 tokens per session together, scanned A, original, no licence file.

A tool for creating software architecture and process-flow diagrams with D2, a language for describing diagrams in text. It uses C4 conventions, a way to show software systems at different levels of detail.

In plain words
What is it for?
Drawing architecture diagrams, mapping system components and relationships, documenting flows, and refining diagram layout and quality.
Why use it?
It helps turn system structure and processes into consistent diagrams that are easier to review. It also includes guidance for layout and a quality-review cycle.

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 denisraison/claude-plugins
agentmods
npx agentmods add plugins/denisraison/claude-plugins/d2-diagrams
Clone the repo
git clone --depth 1 https://github.com/denisraison/claude-plugins

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill cost 63 tokens a session between them.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

d2-diagrams 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 3d 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.

plugins/d2-diagrams/.claude-plugin/plugin.json · 14 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

Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 63 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. 3d ago First seen · 14 lines scan A 9c8dbbe082c5

Subscribe to this mod's changes

d2-diagrams is a plugin published in the GitHub repository denisraison/claude-plugins (3 stars, last pushed 2mo ago), with no licence file. 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 2026-08-31.