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 skills add ekusiadadus/draw-mcp --skill draw-iogit clone --depth 1 https://github.com/ekusiadadus/draw-mcpWrote 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.
[](https://agentmods.dev/skills/ekusiadadus/draw-mcp/draw-io)<a href="https://agentmods.dev/skills/ekusiadadus/draw-mcp/draw-io"><img src="https://agentmods.dev/badge/skills/ekusiadadus/draw-mcp/draw-io/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.
<a href="https://agentmods.dev/skills/ekusiadadus/draw-mcp/draw-io"><img src="https://agentmods.dev/badge/skills/ekusiadadus/draw-mcp/draw-io.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00055 | $0.02251 |
| Opus 5 | $0.00028 | $0.01125 |
| Sonnet 5 | $0.00011 | $0.00450 |
| Haiku 4.5 | $0.00006 | $0.00225 |
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 10d 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 — 298 lines — stays where its author put it; the contents beside it link to each section on GitHub.
draw.io XML Generation Specification v2.0
1. Scope
This specification defines the rules for AI-generated draw.io XML files. It ensures consistent, high-quality output that renders correctly in draw.io desktop, web, and PNG export. Rules are categorized as:
- MUST (Severity: ERROR) — Violations break rendering or structure
- SHOULD (Severity: WARNING) — Violations degrade quality
- INFORMATIONAL (Severity: INFO) — Suggestions for best practices
All rules are enforced by the draw-mcp-validate CLI tool with 23 validation rules.
2. Structural Rules (MUST)
2.1 File Hierarchy
mxfile > diagram > mxGraphModel > root > mxCell...
Every file MUST follow this hierarchy. The mxfile element is the root.
2.2 Root Cells
Two root cells MUST always be present:
<mxCell id="0"/>
<mxCell id="1" parent="0"/>
Cell id="0" is the invisible root. Cell id="1" is the default layer with parent="0".
2.3 Parent References
Every mxCell with a parent attribute MUST reference an existing cell id. Orphaned references cause rendering failures.
2.4 Vertex/Edge Exclusivity
A cell MUST NOT have both vertex="1" and edge="1". It is either a shape or a connection, never both.
2.5 Edge Geometry
Edge mxGeometry MUST have relative="1":
<mxCell id="e1" edge="1" parent="1" source="a" target="b"
style="edgeStyle=orthogonalEdgeStyle;">
<mxGeometry relative="1" as="geometry"/>
</mxCell>
2.6 Unique IDs
All mxCell elements MUST have unique id attributes.
2.7 XML Well-Formedness
- MUST NOT use
--inside XML comments (illegal per XML spec) - MUST escape special characters in attribute values:
&,<,>,"
3. Style String Rules (MUST)
3.1 Format
Style strings use key=value; pairs with a trailing semicolon:
style="rounded=1;whiteSpace=wrap;html=1;fontFamily=Noto Sans JP;fontSize=18;"
3.2 Boolean Values
Boolean style keys MUST use 0 or 1, never true or false:
What ships with it
3 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.
- 10d ago First seen · 298 lines · 55 tokens per session scan A 06f2e1bc0558
draw-io is a skill published in the GitHub repository ekusiadadus/draw-mcp (29 stars, last pushed 1mo ago), licensed MIT. It adds 55 tokens to every session and 2,251 once invoked, about $0.0003 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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