portaljs-add-dataset

# PortalJS — Add Dataset ## Overview Register a dataset in a PortalJS (`portaljs-catalog`) portal. The skill appends one entry to `datasets.json` — the single source of truth for the catalog — and routes the underlying bytes by **source first, then size**: a local file defaults to R2 via Git LFS, a remote URL defaults to passthrough (no copy). No per-dataset page is created; the catalog at `/search` lists the new entry and the dynamic showcase route `pages/[owner]/[slug].tsx` renders it automatically at `/@<namespace>/<slug>`. Supported formats for the showcase preview: CSV, TSV, JSON (array), and GeoJSON. ## Prerequisites - A scaffolded PortalJS portal (see `portaljs-new-portal`) with `datasets.json`, `package.json`, and `pages/[owner]/[slug].tsx` present. - The source data: a local file path or a publicly reachable URL. - For the R2/Git LFS default route: `git` and `git-lfs` installed, and an Arc account token (or an OSS Giftless key) to mint a push-scoped LFS credential. - Node 18+ and npm available in the portal directory. ## Instructions The canonical, full step-by-step workflow is [`.claude/commands/portaljs-add-dataset.md`](https://github.com/datopian/portaljs/blob/main/.claude/commands/portaljs-add-dataset.md) — the single source of truth. Read and follow it when executing. Summary: 1. Gather input from `$ARGUMENTS` — source (file path or URL), portal directory (default `.`), dataset name/slug, description, namespace. If the source is missing, interview ...