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 artem-from-ua/claude-plugins --skill plantuml-diagram-guidegit clone --depth 1 https://github.com/artem-from-ua/claude-pluginsWrote 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/artem-from-ua/claude-plugins/plantuml-diagram-guide)<a href="https://agentmods.dev/skills/artem-from-ua/claude-plugins/plantuml-diagram-guide"><img src="https://agentmods.dev/badge/skills/artem-from-ua/claude-plugins/plantuml-diagram-guide/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/artem-from-ua/claude-plugins/plantuml-diagram-guide"><img src="https://agentmods.dev/badge/skills/artem-from-ua/claude-plugins/plantuml-diagram-guide.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 | $0.00092 | $0.01449 |
| Opus 5 | $0.00046 | $0.00724 |
| Sonnet 5 | $0.00018 | $0.00290 |
| Haiku 4.5 | $0.00009 | $0.00145 |
Grade A, and why
plantuml-diagram-guide 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 4d 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 — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PlantUML Diagram Type Guide
Use this guide to choose the right PlantUML diagram type for documentation. When creating or updating .md files, proactively suggest and use the appropriate diagram type.
IMPORTANT: Every diagram MUST include a title directive immediately after the opening tag. This makes diagrams self-documenting. Example: title User Authentication Flow
IMPORTANT: Every diagram MUST set a non-default arrow thickness on the next line — skinparam sequenceArrowThickness 1.5 for sequence, skinparam ArrowThickness 1.5 for every other supported type. At the default 1 arrows weigh no more than element borders.
Visual styling: Read
references/styling.mdfor the arrow thickness table, the muted pastel palette, color support by diagram type, and legend guidance — including the three skinparams every legend needs (legendBackgroundColor #F4F4F4,legendBorderColor transparent,LegendFontColor #404040).
Behavioral Diagrams (how things work)
| Type | When to use | When to suggest | Syntax |
|---|---|---|---|
| Sequence | Interactions between processes/services, API call flows, request-response chains. For ≤ 10 arrows add hide footbox; for longer diagrams keep footbox for navigation |
Spec files with pipeline/API descriptions; new inter-process communication | @startuml with ->, -->, ->> |
| Activity | Algorithms, business logic, decision trees, branching flows, parallel processes | Decision log entries; complex functions with many branches; CI/CD procedures | @startuml with start, :action;, if/then/else, fork |
| State | State machines, object lifecycles, connection/session/process states | Code with if/else chains that implement a state machine; specs describing behavior with distinct states | @startuml with [*] -->, state |
| Use Case | Functional requirements, actor-system interactions, feature overview | PRD files; new feature overview; user stories | @startuml with actor, usecase, --> |
| Timing | Time-based event characteristics, latency profiling, synchronization, timeout/retry logic | Performance documentation; pipeline latency analysis | @startuml with concise/robust, @ |
What ships with it
2 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.
- 4d ago Changed · +2 lines faa87bb4b28d
- 12d ago First seen · 74 lines · 92 tokens per session scan A 00ebc3bc9bc9
plantuml-diagram-guide is a skill published in the GitHub repository artem-from-ua/claude-plugins (11 stars, last pushed 4d ago), licensed MIT. It adds 92 tokens to every session and 1,449 once invoked, about $0.0005 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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