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 smartbrainactivity/visual-diagramming-export --skill plantuml-architectgit clone --depth 1 https://github.com/smartbrainactivity/visual-diagramming-exportWrote 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/smartbrainactivity/visual-diagramming-export/plantuml-architect)<a href="https://agentmods.dev/skills/smartbrainactivity/visual-diagramming-export/plantuml-architect"><img src="https://agentmods.dev/badge/skills/smartbrainactivity/visual-diagramming-export/plantuml-architect/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/smartbrainactivity/visual-diagramming-export/plantuml-architect"><img src="https://agentmods.dev/badge/skills/smartbrainactivity/visual-diagramming-export/plantuml-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00085 | $0.00715 |
| Opus 5 | $0.00043 | $0.00358 |
| Sonnet 5 | $0.00017 | $0.00143 |
| Haiku 4.5 | $0.00009 | $0.00072 |
Grade A, and why
plantuml-architect 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 9d 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 — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PlantUML Architect
This skill enables Claude to author highly technical, formal UML diagrams (structural or behavioral) and deliver them as instantly viewable SVG images by transparently compiling the code against the public Kroki API.
When to Use This Skill
- The user asks for a strict Unified Modeling Language (UML) diagram.
- The user requests a "Sequence diagram", "Class diagram", "Component network", or "Use case diagram".
- The user specifically requests "PlantUML", "Kroki", or "SVG diagram from code".
- The hierarchy is extremely complex and not suited for simple mind maps or manual whiteboarding.
How to Execute the Workflow
1. Author the PlantUML Source Code
Produce the PlantUML syntax enclosed in @startuml and @enduml blocks.
Ensure you strictly follow Sentence Case for all text labels, nodes, and action descriptions.
Example structure:
@startuml
skinparam handwritten false
skinparam backgroundColor transparent
node "User Browser" as user
node "Web Server" as web
database "PostgreSQL" as db
user -> web : Request Dashboard
web -> db : Query User Data
db --> web : Return JSON
web --> user : Render View
@enduml
2. Save the Source Code Locally
Save the generated raw PlantUML code to a fast temporary file inside the diagrams/ folder of this skill, for example: diagrams/diagram.puml.
3. Generate the Hosted Image Link
The final deliverable should NOT be raw code strings, but a working, visual image. To achieve this cleanly and efficiently, use the bundled URL generation script provided with this skill.
Command to execute:
Execute the custom standalone script located in the scripts/ folder using the run_command tool. Point it to the file in the diagrams/ folder:
node "C:\Users\FL2024\.gemini\antigravity\skills\visual-diagramming-export\plantuml-architect\scripts\generate_url.js" "diagrams/diagram.puml"
(Note: If the terminal returns an error like "node is not recognized", you MUST stop and run node c:\Users\FL2024\.gemini\antigravity\skills\visual-diagramming-export\scripts\start-skill.js to trigger the installation wizard for the user).
What ships with it
4 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.
- 9d ago First seen · 60 lines · 85 tokens per session scan A ee8ddf763254
plantuml-architect is a skill published in the GitHub repository smartbrainactivity/visual-diagramming-export (3 stars, last pushed 6mo ago), licensed MIT. It adds 85 tokens to every session and 715 once invoked, about $0.0004 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 2026-08-31.
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