PortalJS is a framework for building data portals that present searchable datasets through a home page, catalog, and dataset showcase. It is for teams that want to choose a data backend, scaffold a Next.js portal, load CSV or JSON data, connect services such as CKAN, and deploy the result. The catalogue entries are agent commands, skills, instructions, and a plugin that guide portal creation and data loading.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add datopian/portaljs --skill portaljs-add-mapgit clone --depth 1 https://github.com/datopian/portaljsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/datopian/portaljs/portaljs-add-map)<a href="https://agentmods.dev/skills/datopian/portaljs/portaljs-add-map"><img src="https://agentmods.dev/badge/skills/datopian/portaljs/portaljs-add-map/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/datopian/portaljs/portaljs-add-map"><img src="https://agentmods.dev/badge/skills/datopian/portaljs/portaljs-add-map.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 57 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 67 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00069 | $0.01474 |
| Opus 5.5 | $0.00028 | $0.00590 |
| Sonnet 5.5 | $0.00014 | $0.00295 |
| Haiku 4.5 | $0.00007 | $0.00147 |
Grade A, and why
portaljs-add-map scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 17d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PortalJS — Add Map
Overview
Add an interactive Leaflet map as a view on a dataset's showcase in a
portaljs-catalog portal. The skill installs react-leaflet/leaflet (added directly —
never @portaljs/components), writes a reusable Map component split across
MapView.tsx (the Leaflet code) and Map.tsx (a dynamic(..., { ssr: false }) wrapper,
since Leaflet touches window at module load), and renders <Map /> into the Views
section of the showcase route pages/[owner]/[slug].tsx for one chosen GeoJSON dataset.
The dataset should already carry format: "geojson" in datasets.json; if it doesn't
exist yet, the skill can copy the file and register it first.
Prerequisites
- A scaffolded PortalJS portal (see
portaljs-new-portal). - The target dataset registered in
datasets.jsonwithformat: "geojson"(seeportaljs-add-dataset), or a GeoJSON source file/URL to register. - Node 18+ and npm available in the portal directory.
Instructions
The canonical, full step-by-step workflow is
.claude/commands/portaljs-add-map.md — the
single source of truth. Read and follow it when executing. Summary:
- Gather input — dataset slug (or a GeoJSON source to register), portal directory. If any is missing, interview the user; never dead-end on a missing value.
- Validate the portal directory (
datasets.json,package.json,pages/[owner]/[slug].tsxmust exist). - Resolve the dataset from
datasets.json, or validate and register a new GeoJSON source (copy to/public/data/, append a manifest entry). - Install map dependencies:
npm install react-leaflet@^5 leaflet@^1.9andnpm install -D @types/leaflet(skip if already present). - Write
components/MapView.tsxandcomponents/Map.tsx(idempotent — skip ifMap.tsxalready exists). - Render
<Map />into the Views section, gated on the dataset's(namespace, slug)so other showcases are unaffected. Extend an existing view-dispatch block, do not overwrite it. - Verify with
npx tsc --noEmit(nevernext buildagainst a live dev server). - Report the component, route, and dependency added.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 17d ago Changed · +3 lines d859ec59fa9d
- 2mo ago First seen · 108 lines · 69 tokens per session scan A 3ef788fba54f
portaljs-add-map is a skill published in the GitHub repository datopian/portaljs (2,370 stars, last pushed 9d ago), licensed MIT. It adds 69 tokens to every session and 1,474 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
portaljs-add-map compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| portaljs-add-mapdatopian/portaljs | Skill | 2.4k | 9d ago | MIT | A | 69 | Claude Code |
| leafletznlgis/opengis-skills | Skill | 76 | 10d ago | MIT | A | 69 | Claude Code, Codex |
| openlayersznlgis/opengis-skills | Skill | 76 | 10d ago | MIT | A | 78 | Claude Code, Codex |
| migrate-radix-to-baseshadcn-ui/ui | Skill | 127k | yesterday | MIT | A | 61 | Cursor |
| saas-builderixartz/SaaS-Boilerplate | Skill | 7.5k | 5d ago | MIT | A | 75 | Claude Code, Codex |
| trigger-authoring-taskstriggerdotdev/trigger.dev | Skill | 17k | 3d ago | Apache-2.0 | A | 115 | Claude Code, Codex |
| fast-typescript-checkinternet-development/www-sacred | Skill | 1.6k | 2d ago | MIT | A | 84 | Claude Code, Codex |