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.
npx agentmods add skills/softaworks/agent-toolkit/draw-ionpx skills add softaworks/agent-toolkit --skill draw-iogit clone --depth 1 https://github.com/softaworks/agent-toolkitWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00033 | $0.02032 |
| Opus 5 | $0.00016 | $0.01016 |
| Sonnet 5 | $0.00007 | $0.00406 |
| Haiku 4.5 | $0.00003 | $0.00203 |
Grade A, and why
draw-io 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.
How it starts
The opening of the file, as written. The whole thing — 279 lines — stays where its author put it; the contents beside it link to each section on GitHub.
draw.io Diagram Skill
1. Basic Rules
- Edit only
.drawiofiles - Do not directly edit
.drawio.pngfiles - Use auto-generated
.drawio.pngby pre-commit hook in slides
2. Font Settings
For diagrams used in Quarto slides,
specify defaultFontFamily in mxGraphModel tag:
<mxGraphModel defaultFontFamily="Noto Sans JP" ...>
Also explicitly specify fontFamily in each text element's style attribute:
style="text;html=1;fontSize=27;fontFamily=Noto Sans JP;"
3. Conversion Commands
See conversion script at scripts/convert-drawio-to-png.sh.
# Convert all .drawio files
mise exec -- pre-commit run --all-files
# Convert specific .drawio file
mise exec -- pre-commit run convert-drawio-to-png --files assets/my-diagram.drawio
# Run script directly (using skill's script)
bash ~/.claude/skills/draw-io/scripts/convert-drawio-to-png.sh assets/diagram1.drawio
Internal command used:
drawio -x -f png -s 2 -t -o output.drawio.png input.drawio
| Option | Description |
|---|---|
-x |
Export mode |
-f png |
PNG format output |
-s 2 |
2x scale (high resolution) |
-t |
Transparent background |
-o |
Output file path |
4. Layout Adjustment
4.1. Coordinate Adjustment Steps
- Open
.drawiofile in text editor (plain XML format) - Find
mxCellfor element to adjust (search byvalueattribute for text) - Adjust coordinates in
mxGeometrytagx: Position from lefty: Position from topwidth: Widthheight: Height
- Run conversion and verify
4.2. Coordinate Calculation
- Element center coordinate =
y + (height / 2) - To align multiple elements, calculate and match center coordinates
5. Design Principles
5.1. Basic Principles
- Clarity: Create simple, visually clean diagrams
- Consistency: Unify colors, fonts, icon sizes, line thickness
- Accuracy: Do not sacrifice accuracy for simplification
5.2. Element Rules
What ships with it
5 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.
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.
- 2d ago First seen · 279 lines · 33 tokens per session scan A fb23a8baa3a3
draw-io is a skill published in the GitHub repository softaworks/agent-toolkit (2,413 stars, last pushed 6mo ago), licensed MIT. It adds 33 tokens to every session and 2,032 once invoked, about $0.0002 per session on Opus 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 2026-08-30.
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