Portaljs Define Schema
Portaljs Define Schema is an agent skill (a SKILL.md file) from datopian/portaljs. Define a dataset's metadata profile — infer a Frictionless Table Schema from its data, add Data Package metadata (license, sources, keywords), and write it into datasets.json so the showcase… It works with Claude Code and has 2,357 GitHub stars across a repository of 3 listed skills.
github.com/datopian/portaljs/skills/portaljs-define-schema (opens in a new tab)
- Official
- Multi-skill repo
- Plugin marketplace
- Data & analysis
- Actively maintained
Add this skill
Claude
This repository is a Claude Code plugin marketplace. In Claude Code:
/plugin marketplace add datopian/portaljs
/plugin install portaljs@datopian-portaljsIn the Claude apps, zip the portaljs-define-schema folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).
ChatGPT / Codex
Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:
git clone --depth 1 https://github.com/datopian/portaljs.git
cp -r portaljs/skills/portaljs-define-schema .agents/skills/portaljs-define-schema # repo; ~/.agents/skills for all projectsStandalone skills also load in the ChatGPT desktop app.
Cursor
Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:
git clone --depth 1 https://github.com/datopian/portaljs.git
cp -r portaljs/skills/portaljs-define-schema .cursor/skills/portaljs-define-schema # project; ~/.cursor/skills for all projectsSource (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)
What this skill does
Define a dataset's metadata profile — infer a Frictionless Table Schema from its data, add Data Package metadata (license, sources, keywords), and write it into datasets.json so the showcase renders a typed field table. Extend or customize via the L0-L3 profile ladder. Use when a registered dataset needs field types, constraints, or catalog metadata before publishing. Define a dataset's metadata profile — the authoring skill for the metadata-profile contract (lib/metadata).
When it triggers
- Use when a registered dataset needs field types, constraints, or catalog metadata before publishing.
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3 skills are listed from this repository.
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What is the Portaljs Define Schema skill?
Portaljs Define Schema is an agent skill (a SKILL.md file) from datopian/portaljs. Define a dataset's metadata profile — infer a Frictionless Table Schema from its data, add Data Package metadata (license, sources, keywords), and write it into datasets.json so the showcase… It works with Claude Code and has 2,357 GitHub stars across a repository of 3 listed skills. Its SKILL.md lives at github.com/datopian/portaljs/skills/portaljs-define-schema.
How do I install the Portaljs Define Schema skill?
In Claude Code, run /plugin marketplace add datopian/portaljs and then /plugin install portaljs@datopian-portaljs. For Codex or Cursor, copy the portaljs-define-schema folder into .agents/skills/ or .cursor/skills/.
Is the Portaljs Define Schema skill free?
Yes. The repository is open source under the MIT license.
Is Portaljs Define Schema maintained?
The repository's most recent commit was on Sep 7, 2026. Its latest release is create-portaljs@0.6.0. appsgit only lists skills from repositories with a commit in the last six months.