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 Mathews-Tom/armory --skill chart-claritygit clone --depth 1 https://github.com/Mathews-Tom/armoryWrote 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/mathews-tom/armory/chart-clarity)<a href="https://agentmods.dev/skills/mathews-tom/armory/chart-clarity"><img src="https://agentmods.dev/badge/skills/mathews-tom/armory/chart-clarity.svg" alt="Measured on agentmods" 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 | $0.00120 | $0.02254 |
| Opus 5 | $0.00060 | $0.01127 |
| Sonnet 5 | $0.00024 | $0.00451 |
| Haiku 4.5 | $0.00012 | $0.00225 |
Grade A, and why
chart-clarity 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 8d 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 — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Chart Clarity
Create and critique charts that make quantitative comparisons obvious without decorative chartjunk. This skill adapts Caylent's MIT-licensed tufte-data-viz skill into armory under the broader chart-clarity name. It applies Edward Tufte's core data visualization principles and adds screen-first requirements for accessibility, responsiveness, dark mode, progressive disclosure, and human-readable numbers.
Use this skill whenever the user asks for a chart, graph, plot, dashboard visualization, sparkline, slopegraph, data table, or visualization review. It covers Recharts, ECharts, Chart.js, matplotlib, Plotly, seaborn, D3.js, SVG, and HTML.
When to Use
| User need | Use chart-clarity |
Use instead |
|---|---|---|
| Generate chart code in Recharts, Plotly, matplotlib, Chart.js, ECharts, D3, SVG, or HTML | Yes | — |
| Review an existing chart for misleading design, clutter, accessibility, or readability | Yes | — |
| Restyle dashboard charts while keeping the dashboard structure unchanged | Yes | ux-expert for broader dashboard UX |
| Build a static infographic or rich HTML artifact around charts | No | static-web-artifacts-builder |
| Design a slide deck or presentation using charts | No | html-presentation, marp-slides, or pptx |
| Design logos, posters, icons, or non-data visuals | No | concept-to-image or canvas-design |
Trigger Families
- Chart creation: "create a chart", "plot this data", "make a graph", "build a sparkline", "generate a slopegraph".
- Chart review: "review this visualization", "what is wrong with this graph", "make this chart clearer", "remove chartjunk".
- Tufte-specific: "Tufte chart", "high data-ink ratio", "range-frame axes", "small multiples", "direct labels".
- Library-specific: "Recharts", "ECharts", "Chart.js", "matplotlib", "seaborn", "Plotly", "D3", "SVG chart".
Workflow
Follow this order for every chart task.
- Identify the message. Determine the finding the chart needs to make visible. A useful title states the finding: "Revenue Beat Target by 24% in Q2", not "Revenue by Month".
- Identify comparison context. Add a baseline, prior period, target, average, peer group, or distribution. A number without comparison context is weak evidence.
- Choose the chart type. Use the data shape to select line, horizontal bar, scatter, small multiple, sparkline, slopegraph, heatmap, or table. Refuse pie charts by default; use sorted horizontal bars unless the user explicitly asks for a pie chart.
- Apply the universal rules. Remove decorative ink, direct-label series, use gray-first color, annotate notable features, format numbers for humans, and ensure the chart earns its space.
- Read one library reference. For implementation code, read exactly one matching library file from
references/rules/unless the task compares multiple libraries. - Validate before presenting. Run the checklist at the end of this file against the final chart or review output.
What ships with it
32 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.
- assets/showcase/before-after-animated.gif 444 KB
- assets/showcase/before-after.png 183 KB
- assets/showcase/small-multiples.png 100 KB
- assets/showcase/tufte-accessible-scatter.png 91 KB
- assets/showcase/tufte-bar-chart.png 67 KB
- assets/showcase/tufte-dark-mode.png 119 KB
- assets/showcase/tufte-data-table.png 87 KB
- assets/showcase/tufte-light-dark.png 105 KB
- assets/showcase/tufte-line-chart.png 127 KB
- assets/showcase/tufte-slopegraph.png 109 KB
- assets/showcase/tufte-sparklines.png 83 KB
- evals/cases.yaml 3.6 KB
- references/examples/chartjs-tufte-plugin.js 4.8 KB runs code
- references/examples/echarts-tufte-theme.ts 4.5 KB runs code
- references/examples/matplotlib-tufte-annotated.py 3.8 KB runs code
- references/examples/plotly-tufte-template.py 4.2 KB runs code
- references/examples/recharts-tufte-bar.tsx 2.2 KB
- references/examples/recharts-tufte-line.tsx 5.3 KB
- references/examples/sparkline-inline.svg 800 B
- references/interactive-demo.html 48 KB
- references/rules/anti-patterns.md 6.7 KB
- references/rules/chartjs.md 8.1 KB
- references/rules/echarts.md 7.3 KB
- references/rules/interactive-and-accessible.md 7.5 KB
- references/rules/matplotlib.md 8.0 KB
- references/rules/plotly.md 6.1 KB
- references/rules/recharts.md 9.8 KB
- references/rules/small-multiples-sparklines.md 9.7 KB
- references/rules/svg-html.md 7.3 KB
- references/rules/typography-and-color.md 5.7 KB
- references/upstream/LICENSE 1.0 KB
- references/upstream/provenance.md 1.8 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.
- 8d ago First seen · 137 lines · 120 tokens per session scan A 6673d21d33cf
chart-clarity is a skill published in the GitHub repository Mathews-Tom/armory (316 stars, last pushed 2d ago), licensed MIT. It adds 120 tokens to every session and 2,254 once invoked, about $0.0006 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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