OpenData Skills

Agent skills for data, visualizations, and design. Built on the Agent Skills spec, distributed as a Claude Code plugin marketplace.

Plugin	What it does	Skills
opendata	Query and analyze public datasets via the OpenData API	opendata-api
openchart	Generate charts, tables, graphs, and sankey diagrams with OpenChart	openchart
opendesign	Create SVG logos, icons, and graphics	svg-design

Installation

Claude Code

Add the marketplace, then install whichever plugins you need:

/plugin marketplace add tryopendata/skills

/plugin install opendata@opendata-skills
/plugin install openchart@opendata-skills
/plugin install opendesign@opendata-skills

Or from the CLI directly:

claude plugin marketplace add tryopendata/skills
claude plugin install opendata@opendata-skills

You can scope the install with --scope project (shared via version control) or --scope local (gitignored). Default is user (available everywhere).

OpenAI Codex, Gemini CLI, Cursor, VS Code/Copilot, etc.

Each skill is a standalone Agent Skills spec directory with a SKILL.md file. To use them on other platforms, copy the skill directory you want into your platform's skills location (typically .agents/skills/):

plugins/<plugin>/skills/<skill-name>/   # copy this directory

For example, to add svg-design to a Codex project:

cp -r plugins/opendesign/skills/svg-design .agents/skills/svg-design

Check your platform's Agent Skills docs for where it discovers skills.

Migrating from pre-1.0? svg-design moved from the openchart plugin to the new opendesign plugin in v1.0.0.

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Contributing

Structure

.claude-plugin/
  marketplace.json           # Claude Code marketplace registry
plugins/
  opendata/                  # OpenData plugin
    skills/
      opendata-api/
  openchart/                 # OpenChart plugin
    skills/
      openchart/
  opendesign/                # OpenDesign plugin
    skills/
      svg-design/

Each skill is a directory with a SKILL.md file:

skills/<name>/
├── SKILL.md        # Instructions with YAML frontmatter (name + description)
├── evals/          # Test cases for output quality verification
├── scripts/        # Bundled executable code
├── references/     # Supplementary docs loaded on-demand
└── assets/         # Templates, schemas, static resources

Adding a Skill

1. Create a directory under plugins/<plugin>/skills/ with a SKILL.md file
2. Follow the Agent Skills specification for frontmatter format
3. Add evals to verify output quality
4. See best practices for writing effective skills

License

MIT