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Agent skill

Portaljs Migrate

by datopian in datopian/portaljs

Migrate (harvest) datasets between open-data platforms. An agent skill from datopian/portaljs.

MITAuto-check passedMarketing & SEO

Install Portaljs Migrate

skills CLI
$ npx skills add datopian/portaljs --skill portaljs-migrate -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install datopian/portaljs portaljs-migrate --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/datopian/portaljs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/portaljs-migrate .claude/skills/portaljs-migrate && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
portaljs-migrate
GitHub stars
2.4k
Used in
1 other repo
Token cost
~1.8k tokens
SKILL.md length
682 words
Files
2 (incl. references)
Skills in repo
14
Repo updated
First seen
Licence
MIT

At a glance

Migrate (harvest) datasets between open-data platforms. An agent skill from datopian/portaljs.

  • Works in 9 steps: Gather input — source type, source URL,… → Validate the target — confirm the static… → Detect the source type from the URL (or… → …
  • Moving datasets from an external open-data platform into a PortalJS portal
  • SKILL.md covers Overview, Prerequisites, Instructions and Output, plus 3 more sections
  • Calls npm and npx; reaches demo.dev.datopian.com and catalog.data.gov; needs CKAN_API_KEY

What it does

Portaljs Migrate is an agent skill from datopian/portaljs. Migrate (harvest) datasets between open-data platforms. Reads CKAN, a DCAT-US /data.json catalog (DKAN, ArcGIS Hub, data.gov), a DCAT / DCAT-AP RDF feed (JSON-LD, Turtle, or RDF/XML), Socrata, OpenDataSoft, or an ArcGIS FeatureServer, and writes them to a static PortalJS catalog or pushes them into a CKAN instance over its API. Use when moving datasets from an external open-data platform into a PortalJS portal, or bridging one CKAN instance to another.

Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/reference.md`). Compatibility notes: Claude Code with PortalJS portals (Next.js 14, React 18, Node 18+). Runs from any project via the plugin, a personal ~/.claude/commands install, or a portaljs…

It sits in Marketing & SEO, covering Schema markup. It works with npm. The repository describes itself as: 🌀 AI-native framework for building data portals. Scaffold a full portal from a brief and load datasets in minutes with agentic skills — any backend (CKAN, GitHub, Frictionless). The licence is MIT.

When your agent uses it

  • Moving datasets from an external open-data platform into a PortalJS portal
  • Bridging one CKAN instance to another

Example prompts

  • “/portaljs-migrate”

Requirements

  • Node.js
  • A credential in CKAN_API_KEY
  • Compatibility (from SKILL.md): Claude Code with PortalJS portals (Next.js 14, React 18, Node 18+). Runs from any project via the plugin, a personal ~/.claude/commands install, or a portaljs clone.
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(npm:*), Bash(npx:*), Bash(node:*), Bash(curl:*), Bash(git:*), WebFetch

Workflow steps

9 steps, taken from the first numbered list in SKILL.md.

  1. Gather input — source type, source URL, target (static/ckan), portal
  2. Validate the target — confirm the static catalog files exist, or that the CKAN
  3. Detect the source type from the URL (or --source) and verify reachability.
  4. Read the source into canonical dataset entries, per the source's field table in
  5. For a static target, resolve resource paths by copy mode: link keeps source
  6. Print a dry-run preview; stop if --dry-run was passed.
  7. Write datasets.json (upsert or --replace), or push packages/resources into
  8. Verify — npm run build (static) or re-query package_search (CKAN).
  9. Report datasets migrated, namespaces touched, and next steps.

What it can do on your machine

Read from SKILL.md and the folder at commit d5c096a. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Bash(npm:*)
    • Bash(npx:*)
    • Bash(node:*)
    • Bash(curl:*)
    • Bash(git:*)
    • WebFetch

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • npm
    • npx

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • demo.dev.datopian.com
    • catalog.data.gov
    • data.europa.eu

    Also links to:

    • docs.ckan.org

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • CKAN_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Claude Code with PortalJS portals (Next.js 14, React 18, Node 18+). Runs from any project via the plugin, a personal ~/.claude/commands install, or a portaljs clone.

    From compatibility in the SKILL.md frontmatter.

Context cost

Portaljs Migrate loads about 1.8k tokens when it runs, and up to ~2.8k if it reads all its reference files. Until then it costs about 118 tokens; SKILL.md has 682 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~118
When it runs · the whole SKILL.md, loaded when a task matches
~1.8k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from datopian/portaljs at commit d5c096a, republished under its MIT licence (© datopian). 682 words, ~1,756 tokens.

Download SKILL.mdSave it as .claude/skills/portaljs-migrate/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
portaljs-migrate
description
Migrate (harvest) datasets between open-data platforms. Reads CKAN, a DCAT-US /data.json catalog (DKAN, ArcGIS Hub, data.gov), a DCAT / DCAT-AP RDF feed (JSON-LD, Turtle, or RDF/XML), Socrata, OpenDataSoft, or an ArcGIS FeatureServer, and writes them to a static PortalJS catalog or pushes them into a CKAN instance over its API. Use when moving datasets from an external open-data platform into a PortalJS portal, or bridging one CKAN instance to another.
allowed-tools
Read, Write, Edit, Bash(npm:*), Bash(npx:*), Bash(node:*), Bash(curl:*), Bash(git:*), WebFetch
compatibility
Claude Code with PortalJS portals (Next.js 14, React 18, Node 18+). Runs from any project via the plugin, a personal ~/.claude/commands install, or a portaljs clone.
version
1.0.0
author
Datopian <hello@datopian.com>
license
MIT
tags
portaljs, data-portal, migration, harvest, dcat, ckan

PortalJS — Migrate

Overview

Harvest datasets from an external open-data platform into a PortalJS portal, or push them into a CKAN instance. Every source reads into one canonical shape — { slug, namespace, name, description, resources[] } — then writes to the target from that shape, so adding a source covers every target automatically.

Supported sources: CKAN, a DCAT-US /data.json catalog (DKAN, ArcGIS Hub, data.gov), a DCAT / DCAT-AP RDF feed, Socrata, OpenDataSoft, or an ArcGIS FeatureServer/MapServer. Supported targets: a static PortalJS catalog (datasets.json, resources linked by URL or downloaded into Cloudflare R2) or a CKAN instance over its write API.

This is the copy-into-the-portal path, the inverse of /portaljs-connect-ckan (which reads the source live at build time): a one-time, re-runnable snapshot so the portal stands alone and needs no backend.

Prerequisites

  • An existing PortalJS portal for the static target: datasets.json, package.json, and pages/[owner]/[slug].tsx must exist (the portaljs-catalog template).
  • Node 18+ and npm, with portal dependencies installed (npm install).
  • Network access to the source platform's API or feed URL.
  • For a CKAN target: a write API key in CKAN_API_KEY — never hardcoded.
  • For download copy mode: git-lfs and a PortalJS Arc account (or a self-hosted Giftless endpoint) to push resource files to R2.
  • For dcat-rdf sources: lib/metadata/dcat-harvest.ts and dcat-profiles.ts (copy from examples/portaljs-catalog/lib/metadata/ if missing), run via npx tsx.

Instructions

Full step-by-step workflow: .claude/commands/portaljs-migrate.md.

  1. Gather input — source type, source URL, target (static/ckan), portal directory, copy mode (link/download), filters. Interview instead of erroring.
  2. Validate the target — confirm the static catalog files exist, or that the CKAN URL and API key authenticate.
  3. Detect the source type from the URL (or --source) and verify reachability.
  4. Read the source into canonical dataset entries, per the source's field table in the reference doc, applying the metadata hygiene rules (license sentinel — never fabricate CC-BY; description sanitizer + fallback chain; source dates preserved with migratedAt separate; cleanTitle display-name cleanup with slugs from the raw title; category from a meaningful theme).
  5. For a static target, resolve resource paths by copy mode: link keeps source URLs; download copies files into the repo under Git LFS, pushed to R2.
  6. Print a dry-run preview; stop if --dry-run was passed.
  7. Write datasets.json (upsert or --replace), or push packages/resources into CKAN over its action API.
  8. Verify — npm run build (static) or re-query package_search (CKAN).
  9. Report datasets migrated, namespaces touched, and next steps.
Show full SKILL.md (293 more words)Show less

Output

Static target: an updated datasets.json (upserted on (namespace, slug)), optionally with resource files in Git LFS served from Cloudflare R2, plus a passing npm run build. CKAN target: created/updated packages and resources; per-dataset failures are logged and skipped, not fatal.

Error Handling

SymptomCauseFix
"not a portaljs-catalog template"datasets.json missingConfirm the portal directory, or run /portaljs-new-portal
CKAN target rejects every write (403)Key missing, expired, or lacks org permissionSet a valid CKAN_API_KEY; stop rather than partially migrating
Source URL matches no known formatAuto-detection failedPass --source explicitly (ckan, dcat, dcat-rdf, socrata, ods, arcgis)
DCAT-RDF fetch returns HTML, not a feedURL is a portal page, not the feedFollow its <link rel="alternate"> href, or use the direct feed URL
Build fails after writeMalformed entry (missing slug/namespace/name)Inspect /tmp/portaljs-migrate-build.log, fix, rebuild
download mode push failsgit-lfs missing, or no Arc/Giftless tokenInstall git-lfs; mint a token via the Arc API or self-hosted Giftless
Duplicate datasets after re-running--replace used unintentionally, or slug collisionsOmit --replace to upsert; keep slugs unique per namespace

Examples

bash
/portaljs-migrate --source ckan --source-url https://demo.dev.datopian.com \
  --target static --portal-dir . --copy-mode link

Upserts all packages from the CKAN demo instance into datasets.json, referencing source resource URLs directly.

Example 2 — data.gov DCAT-US catalog, downloaded into R2
bash
/portaljs-migrate --source dcat --source-url https://catalog.data.gov/data.json \
  --target static --copy-mode download --org-filter epa-gov

Harvests one publisher and copies every resource file into the repo under Git LFS, served from Cloudflare R2.

Example 3 — DCAT-AP RDF feed from a national portal
bash
/portaljs-migrate --source dcat-rdf \
  --source-url https://data.europa.eu/api/hub/search/catalog.jsonld \
  --target static --dry-run

Fetches the JSON-LD feed through the RDF harvester and previews the canonical datasets without writing anything.

Example 4 — CKAN to CKAN (platform-to-platform)
bash
/portaljs-migrate --source ckan --source-url https://old-portal.example.org \
  --target ckan --target-url https://new-portal.example.org --owner-org research

Pushes every package from the old CKAN instance into the new one, filed under research.

Resources

© datopian, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/portaljs-migrate of datopian/portaljs.

  • SKILL.md
  • references/reference.md

Open the folder on GitHubat commit d5c096a

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in datopian/portaljs, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Portaljs Migrate next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

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Works with

Categories

Questions about Portaljs Migrate

What does Portaljs Migrate do?

Migrate (harvest) datasets between open-data platforms. An agent skill from datopian/portaljs. Portaljs Migrate is an agent skill from datopian/portaljs. Migrate (harvest) datasets between open-data platforms.

When should I use Portaljs Migrate?

Portaljs Migrate fits situations like: moving datasets from an external open-data platform into a PortalJS portal; bridging one CKAN instance to another.

How do I install Portaljs Migrate in Claude Code?

Run `npx skills add datopian/portaljs --skill portaljs-migrate -a claude-code`. Or copy the skill folder (skills/portaljs-migrate in datopian/portaljs) into .claude/skills/portaljs-migrate in your project. Claude Code loads it when a task matches its description.

How do I install Portaljs Migrate in Codex?

Run `npx skills add datopian/portaljs --skill portaljs-migrate -a codex`. Or copy the skill folder (skills/portaljs-migrate in datopian/portaljs) into .agents/skills/portaljs-migrate in your project. Codex loads it when a task matches its description.

Can I use Portaljs Migrate in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add datopian/portaljs --skill portaljs-migrate -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/portaljs-migrate, .gemini/skills/portaljs-migrate, .github/skills/portaljs-migrate and .opencode/skills/portaljs-migrate in your project.

What does Portaljs Migrate need to run?

Going by SKILL.md and its folder, Portaljs Migrate needs the command-line tools its instructions call (npm and npx) and credentials named CKAN_API_KEY. Our summary lists: Node.js; A credential in CKAN_API_KEY. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash(npm:*), Bash(npx:*), Bash(node:*), Bash(curl:*), Bash(git:*), WebFetch. Compatibility (from SKILL.md): Claude Code with PortalJS portals (Next.js 14, React 18, Node 18+). Runs from any project via the plugin, a personal ~/.claude/commands install, or a portaljs clone..

Does Portaljs Migrate access the network?

SKILL.md names 4 domains. In commands or code: demo.dev.datopian.com, catalog.data.gov and data.europa.eu; the agent is likely to contact these when it follows the instructions. As links in the text: docs.ckan.org. This is read from the text; nothing was executed.

Is Portaljs Migrate safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Portaljs Migrate use?

Portaljs Migrate is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Portaljs Migrate use?

About 1.8k tokens (SKILL.md is roughly 7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1k tokens, read only when the agent opens those files.

What are the alternatives to Portaljs Migrate?

Skills that share tags, products or a category with Portaljs Migrate: SEO Geo (ReScienceLab/opc-skills, 1.8k stars), GEO-First SEO Audit Tool (zubair-trabzada/geo-seo-claude, 11k stars), Schema Markup (freekmurze/dotfiles, 1k stars) and SEO Optimizer (ailabs-393/ai-labs-claude-skills, 454 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Portaljs Migrate?

datopian (a GitHub organization) maintains it in datopian/portaljs, which has 2,358 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on September 7, 2026.

Source: datopian/portaljs on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.