A plugin that checks database data after every dbt run or dbt build. dbt builds database tables from SQL models, and this plugin runs a read-only verification against a person-approved baseline and passes the findings to the coding agent.

Use it to add automatic data-quality checks after dbt commands, then investigate anomalies and verify the data again after fixing them.

A dbt command can succeed even when it produces incorrect or unexpected data. The automatic check exposes changes in table shape, values, counts, missing data, distributions, or freshness before the result is accepted.

scherlok — Plugin for Claude Code by rbmuller

Install

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.

Clone the repo

git clone --depth 1 https://github.com/rbmuller/scherlok

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/rbmuller/scherlok/claude-code/github.svg)](https://agentmods.dev/plugins/rbmuller/scherlok/claude-code)

Your own site

<a href="https://agentmods.dev/plugins/rbmuller/scherlok/claude-code"><img src="https://agentmods.dev/badge/plugins/rbmuller/scherlok/claude-code/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/rbmuller/scherlok/claude-code"><img src="https://agentmods.dev/badge/plugins/rbmuller/scherlok/claude-code.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 1 skill, 1 hook cost 82 tokens a session between them.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

scherlok 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 yesterday.

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.

integrations/claude-code/.claude-plugin/plugin.json · 14 lines

What it actually says

{
  "name": "scherlok",
  "displayName": "Scherlok",
  "description": "Check the data after every dbt run: a hook runs the read-only `scherlok verify` gate after `dbt run` and `dbt build` and hands Claude the findings, and the verify-data-pipeline skill sets the loop of verify, fix and verify again, with baseline changes left to a person.",
  "author": {
    "name": "Robson Bayer Müller",
    "url": "https://github.com/rbmuller"
  },
  "homepage": "https://rbmuller.github.io/scherlok/agents/",
  "repository": "https://github.com/rbmuller/scherlok",
  "license": "MIT",
  "keywords": ["data-quality", "dbt", "anomaly-detection", "data-engineering"]
}

Contents

What it installs

The manifest is a name and a version. 1 skill, 1 hook travel with it, and installing the plugin installs all of them — 82 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

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.

yesterday First seen · 14 lines scan A 7e4590f16789

Subscribe to this mod's changes

scherlok is a plugin published in the GitHub repository rbmuller/scherlok (13 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-11-06.

Analytics and metrics anomaly-detection bigquery cli data-engineering data-observability data-quality

scherlok next to 6 plugins from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
scherlokrbmuller/scherlok	Plugin	13	yesterday	MIT	A	—	Claude Code
bigquery-data-analyticsgemini-cli-extensions/bigquery-data-analytics	Plugin	50	1mo ago	Apache-2.0	A	—	Claude Code
scomp-linkGiacomoSaccaggi/scomp_link	Plugin	15	7d ago	MIT	A	—	Cursor
bigquery-data-analyticsgemini-cli-extensions/bigquery-data-analytics	Plugin	50	1mo ago	Apache-2.0	A	—	Gemini CLI
freshprobeSudhan30/freshprobe	Plugin	2	7mo ago	MIT	A	—	Claude Code
jkavivsinai/jenkins-cli	Plugin	98	3d ago	MIT	A	—	Claude Code
mc-agent-toolkitmonte-carlo-data/mc-agent-toolkit	Plugin	93	2d ago	Apache-2.0	A	—	Cursor