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contract SKILL.md skillA

contract from datawithbaraa/claude-code-data-engineering-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add datawithbaraa/claude-code-data-engineering-skills/contract@git:20261029.2e2b6c2

Pins git:20261029.2e2b6c2 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: datawithbaraa/claude-code-data-engineering-skills
Path: skills/contract/SKILL.md
Versions recorded: 1
Latest version: git:20261029.2e2b6c2, committed Oct 29, 2026
Size: 2,181 bytes
Repository stars: 81
License: MIT

Use when a new source is connected or a source changes how it delivers, to write the data contract with the source system, the format, the schema, the quality rules, the delivery, the owner and the change process.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Contract

The job: the data contract between the data platform and one source system, written from the profile and the metadata, and agreed with the source owner. It holds facts and agreements, never steps and never SQL. The contract with the consumers of a table is part of the data-product skill.

Input: the name of the source, with its profile and its metadata.

## Steps

1. Start from the profile of the source: every finding marked for the contract.
2. The format the source delivers: one delimiter, one encoding, one date format, one decimal separator, one null token.
3. The schema: take the tables, columns, types, keys and descriptions from the metadata file, never retype them. Mark the required columns.
4. The quality rules the source agrees to: unique keys, no empty required columns, values in range.
5. The delivery: how often, by what time, full or only the changes, and how a deleted row is marked.
6. The owner and the support channel on the source side.
7. The change process: the version of the contract, and how many days before a change the source announces it.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add datawithbaraa/claude-code-data-engineering-skills/contract@sha256:cfebb8abf6b211c0

The line at the top of this page pins the label git:20261029.2e2b6c2, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_qek4l3w2sird374g.svg)](https://markdownregistry.com/a/art_qek4l3w2sird374g)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Oct 29, 2026.

version	committed	commit	size	audit
git:20261029.2e2b6c2 latest	2026-10-29	2e2b6c2	2,181 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the 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 (2181 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

datawithbaraa/claude-code-data-engineering-skills · 81 stars · license MIT · pushed 2026-11-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_qek4l3w2sird374g
GET https://markdownregistry.com/api/v1/resolve?ref=datawithbaraa/claude-code-data-engineering-skills/contract
GET https://markdownregistry.com/api/v1/blob/cfebb8abf6b211c0d3d2226251fedd3fd9a9c8262eeeda61f662ca741d05e622

Your AI assistant 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.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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CLAUDE.md CLAUDE.md file

datawithbaraa/claude-code-data-engineering-skills · CLAUDE.md

git:20261029.a57f353 · audit A · 81 stars

big-review SKILL.md skill

datawithbaraa/claude-code-data-engineering-skills · skills/big-review/SKILL.md · Use once a month, or when the platform feels slow, heavy or cluttered, to review the whole platform from the query logs…