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drawio-skill

drawio-skill is a skill for Claude Code from LFTPadilla/agent-dev-kit. It costs 120 tokens per session (9,524 once invoked), scanned A, original, MIT.

A tool guide for creating editable diagrams and exporting them as PNG, SVG, PDF, or JPG files with draw.io. It supports flowcharts, architecture diagrams, UML, database diagrams, network maps, and other structured visuals.

In plain words
What is it for?
Use it to create system architectures, ER diagrams, sequence diagrams, class diagrams, network topologies, machine-learning figures, or mind maps.
Why use it?
It provides a consistent way to make precise diagrams that can remain editable, including when the exported image is shared.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions Codex.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is mkdir -p ./artifacts && drawio -x -f png -e -s 2 -o ./artifacts/diagram.drawio.png input.drawio.

Part of the dev-skills plugin — 26 skills, 1 command shipped together

not rated 2repo 1mo ago A scan 120 tokens original MIT

Good fit Use it to create system architectures, ER diagrams, sequence diagrams, class diagrams, network topologies, machine-learning figures, or mind maps.

Compare 6 skills from other repositories ↓
View source ↗ LFTPadilla/agent-dev-kit agent-dev-kit.devpipe.net
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/LFTPadilla/agent-dev-kit
agentmods
npx agentmods add skills/lftpadilla/agent-dev-kit/drawio-skill

Made for: Claude Code.

Or install dev-skills, the plugin that ships this one along with the rest of its 26 skills, 1 command.

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 drawio-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/lftpadilla/agent-dev-kit/drawio-skill/github.svg)](https://agentmods.dev/skills/lftpadilla/agent-dev-kit/drawio-skill)
Your own site
<a href="https://agentmods.dev/skills/lftpadilla/agent-dev-kit/drawio-skill"><img src="https://agentmods.dev/badge/skills/lftpadilla/agent-dev-kit/drawio-skill/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 drawio-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/lftpadilla/agent-dev-kit/drawio-skill"><img src="https://agentmods.dev/badge/skills/lftpadilla/agent-dev-kit/drawio-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 120 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 9,524 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 $0.00120 $0.09524
Opus 5.5 $0.00048 $0.03810
Sonnet 5.5 $0.00024 $0.01905
Haiku 4.5 $0.00012 $0.00952

Measured 2mo ago against content hash 07bae75d5f0c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

drawio-skill 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 2mo ago.

The scan reads SKILL.md. This mod also ships 11 executable files (scripts/aiicons.py, scripts/autolayout.py, scripts/encode_drawio_url.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/dev-skills/skills/drawio-skill/SKILL.md · 489 lines

How it starts

The opening of the file, as written. The whole thing — 489 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Draw.io Diagrams

Vendored from Agents365-ai/drawio-skill (MIT). See LICENSE in this directory and the repo's ATTRIBUTION.md.

Overview

Generate .drawio XML files and export to PNG/SVG/PDF/JPG locally using the native draw.io desktop app CLI.

Supported formats: PNG, SVG, PDF, JPG — no browser automation needed.

PNG, SVG, and PDF exports support --embed-diagram (-e) — the exported file contains the full diagram XML, so opening it in draw.io recovers the editable diagram. Use double extensions (name.drawio.png) to signal embedded XML.

When to use / when NOT to use

Use this skill for: polished, precise diagrams (architecture, network, strict UML, ERD), anything needing solid opaque fills, 10,000+ stock/branded shapes, swimlanes, or custom geometry, exported as editable PNG/SVG/PDF.

Do NOT use it — route elsewhere — for:

  • A casual hand-drawn / whiteboard look → excalidraw or tldraw.
  • Diagrams-as-code that live in git / render in Markdown → mermaid (general) or plantuml (UML).
  • Freeform infinite-canvas sketching or freehand strokes → tldraw.

Bundled resources

When the workflow references one of these, read it on demand — none of them need to be in context up front.

File Read it when
references/diagram-types.md The user names a specific diagram type (ERD, UML class, sequence, architecture, ML/DL, flowchart)
references/shapes.md + scripts/shapesearch.py The diagram needs a specific shape — a cloud icon (AWS/Azure/GCP), Cisco/Kubernetes/network symbol, UML/BPMN/ER/electrical/P&ID element — or any time you'd otherwise guess a style= string. shapesearch.py "<keywords>" returns the exact official style for 10k+ shapes
scripts/aiicons.py The diagram involves an AI/LLM brand (OpenAI, Claude, Gemini, Mistral, Llama, HuggingFace, Ollama, LangChain, …) — aiicons.py "<brand>" returns a draw.io image style for the brand logo (lobe-icons via CDN; --embed to inline). draw.io has no built-in AI logos. See references/shapes.md → "AI / LLM brand logos"
references/style-presets.md The user asks to learn / save / list / set-default / delete a style preset, or you've resolved an active preset and need the application rules
references/style-extraction.md You're inside the Learn flow and need the extraction procedure (called from style-presets.md)
references/troubleshooting.md An export fails, vision rejects a PNG, or a rendering looks wrong
scripts/repair_png.py After every -e PNG export — fixes draw.io's truncated IEND chunk (issue #8)
scripts/encode_drawio_url.py The CLI is unavailable and you need a browser-fallback diagrams.net URL (--edit for an editable editor URL)
references/autolayout.md The diagram is large or layout-heavy (dependency/call graph, code structure, >~15 nodes) and you want Graphviz to place nodes + route edges instead of hand-placing coordinates
scripts/pyimports.py · jsimports.py · goimports.py · rustimports.py The user wants to visualize a Python, JS/TS, Go, or Rust project structure — extracts the import graph (transitive-reduced, optional --group containers, nested by sub-package) for autolayout
scripts/pyclasses.py The user wants a Python class hierarchy / class diagram — extracts classes + inheritance edges (boxed by module with --group) for autolayout
scripts/validate.py You generated a .drawio (especially via autolayout or for a large hand-placed diagram) and want a fast deterministic structural lint (dangling edges, dup/reserved ids, broken parents, overlaps) before the vision self-check

Read the full file on GitHub · 489 lines

Files

What ships with it

25 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 489 lines · 120 tokens per session scan A 07bae75d5f0c

Subscribe to this mod's changes

drawio-skill is a skill published in the GitHub repository LFTPadilla/agent-dev-kit (2 stars, last pushed 1mo ago), licensed MIT. It adds 120 tokens to every session and 9,524 once invoked, about $0.0005 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.

Claude CodeCode reviewDesign and UXLLMagent-skillsai-agentsdeveloper-tools
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