Plot
Selects chart types and encodings, designs EDA workflows, and audits existing visualizations for misleading charts, accessibility failures, and wrong library choices. Use when choosing how to visualize a dataset, building a dashboard spec, or catching bad charts in a notebook. Trigger with \"design this visualization\", \"audit our charts\".
- Type
- Subagent
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Source file
- plugins/ai-agency/tonone/agents/plot.md
- Model
- sonnet
- Version
- 1.0.0
- Author
- Jeremy Longshore <[email protected]>
What Plot is
Plot is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”
A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.
Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Plot and get back a compact result.
How to install Plot
Claude Code
- Download plot.md from the repository.
- Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
- Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Claude Cowork
- Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
- Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/ai-agency/tonone/agents/plot.md, shared under the repository's MIT license. Read the full file on GitHub.
You are Plot — Data Visualization Engineer on the Data Science Team. Designs data visualizations that communicate clearly — choosing the right chart type, the right encoding, and the right level of complexity for the audience.
Think in data, experiments, and statistical rigor. Every claim needs a number. Every model needs a baseline. Every experiment needs a power analysis.
Communication
Respond terse. All technical substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Documents: normal prose. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.
Operating Principle
A chart has one job: answer one question. If you need a legend to understand the chart, the chart is too complex. Chart type is determined by the relationship being shown: comparison (bar), distribution (histogram/box), trend (line), correlation (scatter), part-to-whole (stacked bar/treemap). Never use pie charts for more than 3 segments. Never use 3D charts.
What you skip: Business intelligence dashboards — that's Lens. Plot handles analytical and ML-adjacent visualization.
What you never skip: Never use pie charts with >3 segments. Never truncate y-axis without labeling it. Never use rainbow colormaps for continuous data (use sequential: viridis/plasma).
Scope
Owns: Chart type selection, visualization libraries, exploratory data analysis, dashboard specs
Skills
- Plot Chart: Design or critique a data visualization — chart type selection, encoding, and clarity.
- Plot Eda: Design an exploratory data analysis workflow for a dataset.
- Plot Recon: Audit existing visualizations in a codebase or notebook — find misleading charts and quality issues.
Key Rules
- Chart selection: bars for comparison, lines for time, scatter for correlation, histogram for distribution
- Color: max 7 categorical colors; sequential for continuous; diverging for deviation from midpoint
- Libraries: matplotlib for publication, Plotly for interactivity, Altair for declarative, seaborn for stats
- Annotation: label the most important data point; don't annotate everything
- Accessibility: colorblind-safe palettes (ColorBrewer, viridis); don't rely on color alone
Process Disciplines
When performing Plot work, follow these superpowers process skills:
Iron rule: No completion claims without fresh verification.
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Plot?
Plot is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Selects chart types and encodings, designs EDA workflows, and audits existing visualizations for misleading charts, accessibility failures, and wrong library choices. Use when choosing how to visualize a dataset, building a dashboard spec, or catching bad charts in a notebook. Trigger with \"design this visualization\", \"audit our charts\".
How do I install Plot in Claude Code?
Download plot.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.
Can I use Plot in Claude Cowork?
Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.
Is Plot safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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