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
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/datopian/portaljsnpx agentmods add commands/datopian/portaljs/portaljs-check-data-qualityWrote 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/commands/datopian/portaljs/portaljs-check-data-quality)<a href="https://agentmods.dev/commands/datopian/portaljs/portaljs-check-data-quality"><img src="https://agentmods.dev/badge/commands/datopian/portaljs/portaljs-check-data-quality/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/commands/datopian/portaljs/portaljs-check-data-quality"><img src="https://agentmods.dev/badge/commands/datopian/portaljs/portaljs-check-data-quality.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00037 | $0.00312 |
| Opus 5 | $0.00018 | $0.00156 |
| Sonnet 5 | $0.00007 | $0.00062 |
| Haiku 4.5 | $0.00004 | $0.00031 |
Grade A, and why
portaljs-check-data-quality 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 9d 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.
What it actually says
/portaljs-check-data-quality
Run a read-only data quality audit for a specific local file or remote file URL. Requires python3.
Usage
bash scripts/portaljs-check-data-quality.sh "FILE_PATH_OR_URL"
Examples:
bash scripts/portaljs-check-data-quality.sh "./data/trash.csv"
bash scripts/portaljs-check-data-quality.sh "https://example.com/trash.csv"
What it checks
- row count
- null and blank values
- duplicate rows
- duplicate values for likely identifier columns
- numeric min/max and negative values
- likely year/date field quality
- ambiguous overlapping year columns such as
calendar yearandfiscal year - mixed-type columns based on sampled values
Output
A JSON object with:
status:ok,warning, orcriticalfile,file_name,source_typerow_count,column_countfindings: array of structured issuesrecommendations: array of suggested next stepscolumn_profiles: per-column summary
Notes
- Read-only; accepts one CSV or TSV file at a time.
- Local paths and
http/httpsURLs are supported.
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.
- 9d ago First seen · 48 lines · 37 tokens per session scan A f12cdf09cc2e
portaljs-check-data-quality is a command published in the GitHub repository datopian/portaljs (2,349 stars, last pushed yesterday), licensed MIT. It adds 37 tokens to every session and 312 once invoked, about $0.0002 per session on Opus 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.
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