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 marchatton/agent-skills --skill visual-explainergit clone --depth 1 https://github.com/marchatton/agent-skillsWrote 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/marchatton/agent-skills/visual-explainer)<a href="https://agentmods.dev/skills/marchatton/agent-skills/visual-explainer"><img src="https://agentmods.dev/badge/skills/marchatton/agent-skills/visual-explainer/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/marchatton/agent-skills/visual-explainer"><img src="https://agentmods.dev/badge/skills/marchatton/agent-skills/visual-explainer.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 | $0.00090 | $0.07195 |
| Opus 5.5 | $0.00036 | $0.02878 |
| Sonnet 5.5 | $0.00018 | $0.01439 |
| Haiku 4.5 | $0.00009 | $0.00720 |
Grade A, and why
visual-explainer 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 1mo 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.
This is a copy
86% identical to visual-explainer — 355 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 410 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Visual Explainer
Generate self-contained HTML files for technical diagrams, visualizations, and data tables. Always open the result in the browser. Never fall back to ASCII art when this skill is loaded.
Proactive table rendering. When you're about to present tabular data as an ASCII box-drawing table in the terminal (comparisons, audits, feature matrices, status reports, any structured rows/columns), generate an HTML page instead. The threshold: if the table has 4+ rows or 3+ columns, it belongs in the browser. Don't wait for the user to ask — render it as HTML automatically and tell them the file path. You can still include a brief text summary in the chat, but the table itself should be the HTML page.
Workflow
1. Think (5 seconds, not 5 minutes)
Before writing HTML, commit to a direction. Don't default to "dark theme with blue accents" every time.
Visual is always default. Even essays, blog posts, and articles get visual treatment — extract structure into cards, diagrams, grids, tables.
Prose patterns (lead paragraphs, pull quotes, callout boxes) are accent elements within visual pages, not a separate mode. Use them to highlight key points or provide breathing room, but the page structure remains visual.
For prose accents, see "Prose Page Elements" in ./references/css-patterns.md. For everything else, use the standard freeform approach with aesthetic directions below.
Who is looking? A developer understanding a system? A PM seeing the big picture? A team reviewing a proposal? This shapes information density and visual complexity.
What type of content? Architecture, flowchart, sequence, data flow, schema/ER, state machine, mind map, data table, timeline, dashboard, or prose-first page. Each has distinct layout needs and rendering approaches (see Diagram Types below).
What aesthetic? Pick one and commit. The constrained aesthetics (Blueprint, Editorial, Paper/ink) are safer — they have specific requirements that prevent generic output. The flexible ones (IDE-inspired) require more discipline.
What ships with it
21 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.
- .gitignore 10 B
- banner.png 1160 KB
- CHANGELOG.md 11 KB
- LICENSE 1.0 KB
- package.json 329 B
- prompts/diff-review.md 8.2 KB
- prompts/fact-check.md 4.6 KB
- prompts/generate-slides.md 1.9 KB
- prompts/generate-visual-plan.md 6.8 KB
- prompts/generate-web-diagram.md 913 B
- prompts/plan-review.md 9.0 KB
- prompts/project-recap.md 7.0 KB
- README.md 3.7 KB
- references/css-patterns.md 41 KB
- references/libraries.md 18 KB
- references/responsive-nav.md 5.7 KB
- references/slide-patterns.md 44 KB
- templates/architecture.html 17 KB
- templates/data-table.html 16 KB
- templates/mermaid-flowchart.html 13 KB
- templates/slide-deck.html 34 KB
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.
- 1mo ago First seen · 410 lines · 90 tokens per session scan A a458bcf6f73d
visual-explainer is a skill published in the GitHub repository marchatton/agent-skills (5 stars, last pushed 7mo ago), licensed MIT. It adds 90 tokens to every session and 7,195 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 86% identical to visual-explainer, differing in 355 lines, and is treated as a copy.
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