Borrowing it
Nothing to install: this file belongs to Dynokostya/just-works. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Dynokostya/just-works/main/.claude/skills/plantuml-diagramming/SKILL.mdgit clone --depth 1 https://github.com/Dynokostya/just-worksWrote 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/dynokostya/just-works/plantuml-diagramming)<a href="https://agentmods.dev/skills/dynokostya/just-works/plantuml-diagramming"><img src="https://agentmods.dev/badge/skills/dynokostya/just-works/plantuml-diagramming/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/dynokostya/just-works/plantuml-diagramming"><img src="https://agentmods.dev/badge/skills/dynokostya/just-works/plantuml-diagramming.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 | $0.00065 | $0.02728 |
| Opus 5 | $0.00032 | $0.01364 |
| Sonnet 5 | $0.00013 | $0.00546 |
| Haiku 4.5 | $0.00006 | $0.00273 |
Grade A, and why
plantuml-diagramming 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 7d 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 — 253 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PlantUML Diagramming
Match the project's existing conventions. When uncertain, check for existing .puml files to infer the local style -- naming, layout direction, theme usage, and abstraction level. Check for shared includes (!include) or a project theme file. These defaults apply only when the project has no established convention.
References index
Deep-dive material lives alongside this file. Load the reference only when you need it.
references/sequence-diagrams.md-- participants, arrows, activation, grouping, notes and dividers.references/component-deployment.md-- component and deployment diagrams, container types, interfaces.references/activity-diagrams.md-- basic activity flow, swimlane partitions, stereotype coloring rules.references/class-diagrams.md-- relationships table, full example, visibility modifiers, stereotypes, packages.references/state-diagrams.md-- lifecycle modeling, key syntax, concurrent regions.references/other-diagram-types.md-- use case, mindmap, gantt, WBS, ER, JSON/YAML visualization.references/styling.md-- modern<style>blocks, built-in themes, color formats, layout direction.references/preprocessing.md--!include,!procedure,!function, variables, conditionals, loops.
Never rules
These are unconditional. They prevent broken or unreadable diagrams regardless of project style.
-
Never omit
@startuml/@endumldelimiters -- PlantUML silently fails or produces garbage without them. Every.pumlfile must start with@startumland end with@enduml(or the equivalent for the diagram type:@startmindmap/@endmindmap,@startgantt/@endgantt, etc.). -
Never use cryptic abbreviations or internal codenames as labels -- use plain English that any team member understands.
AuthSvcmeans nothing to a product manager;Authentication Servicedoes. Labels are for humans, not compilers. -
Never create diagrams with more than ~15 elements without grouping/nesting -- overcrowded diagrams defeat the purpose. Use
package,rectangle,node,cloud, ortogetherto group related elements. If you cannot group meaningfully, split into multiple diagrams.
What ships with it
8 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.
- 7d ago First seen · 253 lines · 65 tokens per session scan A 6bd604e1855a
plantuml-diagramming is a skill published in the GitHub repository Dynokostya/just-works (14 stars, last pushed 2d ago), licensed Apache-2.0. It adds 65 tokens to every session and 2,728 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 2026-09-04.
Other skills, from other repositories
webgl-holographic-foil
A self-contained WebGL2 hero: thin-film interference over a crushed-foil surface whose palette shifts with the viewing angle; move the cursor to tilt the film.
html-ppt-hermes-cyber-terminal
OpenDesign + BYOK: choosing and wiring your own model, hands-on — cost, quality, and the routing decision. Built as a decision-grade AI literacy deck for engineers, IT, applied-AI teams.
html-ppt-taste-brutalist
16:9 HTML deck in tactical-telemetry / CRT-terminal taste. Deactivated-CRT charcoal slides, white-phosphor monospace, hazard-red accent, scanline overlay, ASCII syntax, density over decoration. Distilled from Leonxlnx/taste-skill brutalist-skill (Tactical Telemetry mode).
visual-ralph
Visual Ralph orchestration for frontend UI from generated references, static references, or live URL targets, using $ultragoal with built-in visual verdict and pixel-diff evidence until the implementation matches and leaves a reproducible design system.
accessibility
Consolidated accessibility skill entrypoint for WCAG 2.2, ARIA Authoring Practices, cognitive accessibility, Section 508, EN 301 549, design intent verification, and the Accessibility Planner workflow.
make-resume
A Chinese-language tool for creating editable HTML resumes that can be changed in a browser and printed to PDF. It uses available resume templates when they are installed and otherwise provides a simpler fallback.