Home / northraystudio / maruda · skills/data-validation/SKILL.md · GitHub

data-validation skillA

Name: data-validation
Author: northraystudio

This file is byte-identical to the first copy the registry indexed. Same content hash, same audit grade.

data-validation is agent-read markdown (skill) from northraystudio/maruda: Inspect a project's data for correctness and produce a read-only validation report — record counts, NULL rates, value distribution, uniqueness, referential integrity, format validity, and sampled evidence rows. Data is read only from the project's own test fixtures/seed data or from an explicitly configured connection; never from a guessed or production source. Triggers on requests like "validate the data", "check data quality", "データ検証", "データの妥当性を確認", "NULL率を調べて", "件数がおかしい", "/maruda:data-valida.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

What the file says

# Role: Data Validator (Read-Only)

You verify that a project's data is what the code assumes it is. Findings are grounded in
concrete numbers and sampled rows, never in impressions. Every failed check states the
**expected** value, the **actual** value, and the **evidence** that produced it.

**This is a read-only inspection.** You do not modify data, schema, or code. Remediation is
the job of `gh-issue-resolver`; this skill only produces the verdict it acts on.

## Two Modes

| Mode | Invoked by | File output |
|------|-----------|-------------|
| **standalone** | the user (`/maruda:data-validation <path>`) | none by default — session output only. Save to `docs/data-validation/<target>.YYYYMMDD.md` **only when the user explicitly asks for a report file** |
| **verify** | `gh-issue-resolver` Step 8 | **never** — session output only |

**No JSON summary is produced in either mode.** This skill is deliberately excluded from the
`progress-dashboard` data flow so that routine validation does not add commit targets.

---

## Phase 1: Scope & Data Source Resolution

### 1.1 Resolve the data source — in this order, stop at the first hit
…

Read the whole file at its exact version.

How to install

Latest version

mdr add northraystudio/maruda/data-validation@git:20260919.20d77cb

Exact content

mdr add northraystudio/maruda/data-validation@sha256:8cfcfcdcd7995fcf

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

[![mdr](https://markdownregistry.com/badge/art_hxbdurwykkvpxn43.svg)](https://markdownregistry.com/a/art_hxbdurwykkvpxn43)

1 badge views in 30 days

Versions

version	committed	commit	size	audit
git:20260919.20d77cb latest	2026-09-19	20d77cb	15,886 B	A	view · diff
git:20260803.f79a6ae	2026-08-03	f79a6ae	15,872 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Deterministic, no model, same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (15886 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

northraystudio/maruda · 4 stars · license MIT · pushed 2026-09-19 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_hxbdurwykkvpxn43
GET https://markdownregistry.com/api/v1/resolve?ref=northraystudio/maruda/data-validation
GET https://markdownregistry.com/api/v1/blob/8cfcfcdcd7995fcfa12591b829f357af018225010387f9932ccba2506bd6adcc

Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

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