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big-review SKILL.md skillA

big-review 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/big-review@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/big-review/SKILL.md
Versions recorded: 1
Latest version: git:20261029.2e2b6c2, committed Oct 29, 2026
Size: 1,610 bytes
Repository stars: 81
License: MIT

Use once a month, or when the platform feels slow, heavy or cluttered, to review the whole platform from the query logs and the repo, and propose improvements with effort and risk.

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

# Big review

The job: one review of the whole platform, from what the consumers use to what nobody uses, every proposal with its effort and risk. It changes nothing.

Input: the period, the last month by default, with at least 90 days of query logs for the unused data.

## Steps

1. Usage: the most read tables, the slowest queries, and the rows scanned against the rows needed.
2. Unused data: the tables and columns nobody read in the last 90 days, checked against the month-end, quarter-end and year-end jobs, the stale tables, and the storage they take.
3. Dead code: the functions, parameters and SQL that nothing uses.
4. Code health: duplicated logic, outdated documents and the longest functions.
5. Data quality: the checks per layer, and the layers without any.
6. Proposals: each one with the effort and the risk, in order of priority. A table is deprecated first and dropped only after its owner agrees.
7. Give the result as one web page.

## Output

One HTML file, like [references/big-review.html](references/big-review.html): the numbers on top, one section per step with a chart or a table, the proposals last. Read it for the layout before you write the page.

## Reads
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add datawithbaraa/claude-code-data-engineering-skills/big-review@sha256:7cca604939e2e0e4

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_ffoh2eyyrkvcyuiy.svg)](https://markdownregistry.com/a/art_ffoh2eyyrkvcyuiy)

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	1,610 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 (1610 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_ffoh2eyyrkvcyuiy
GET https://markdownregistry.com/api/v1/resolve?ref=datawithbaraa/claude-code-data-engineering-skills/big-review
GET https://markdownregistry.com/api/v1/blob/7cca604939e2e0e476046a485c74b0ff31c5455c23f66d712a3a6297e1c3938e

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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