What is dbt-test-gen?

A test generator for dbt projects, where dbt is a tool that builds data models from SQL. It creates tests for input data, model structure, and specific expected results from the original ETL definition.

It helps create and run dbt seed data, schema tests, and one-off assertions for Snowflake data-transformation projects.

It provides an independent check before repairs are made, so fixes are judged against the original data flow rather than the already-broken model SQL.

dbt-test-gen — Skill for Claude Code by sfc-gh-dflippo

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.

Any agent

npx skills add sfc-gh-dflippo/snowflake-dbt-demo --skill dbt-test-gen

Clone the repo

git clone --depth 1 https://github.com/sfc-gh-dflippo/snowflake-dbt-demo

Made for: Claude Code.

Or install snowflake-migration, the plugin that ships this one along with the rest of its 72 skills, 7 agents.

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/skills/sfc-gh-dflippo/snowflake-dbt-demo/dbt-test-gen/github.svg)](https://agentmods.dev/skills/sfc-gh-dflippo/snowflake-dbt-demo/dbt-test-gen)

Your own site

<a href="https://agentmods.dev/skills/sfc-gh-dflippo/snowflake-dbt-demo/dbt-test-gen"><img src="https://agentmods.dev/badge/skills/sfc-gh-dflippo/snowflake-dbt-demo/dbt-test-gen/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/skills/sfc-gh-dflippo/snowflake-dbt-demo/dbt-test-gen"><img src="https://agentmods.dev/badge/skills/sfc-gh-dflippo/snowflake-dbt-demo/dbt-test-gen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 5,905 The whole file, excluding the scripts and references it only reads on demand.

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.

Token cost

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	$0.00056	$0.05905
Opus 5	$0.00028	$0.02952
Sonnet 5	$0.00011	$0.01181
Haiku 4.5	$0.00006	$0.00590

Measured 2d ago against content hash d40a33f929de, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

dbt-test-gen 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 2d 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.

.claude/skills/snowflake-migration/skills/migration/migrate-objects/actions/etl-stabilization/dbt-test-gen/SKILL.md · 519 lines

How it starts

The opening of the file, as written. The whole thing — 519 lines — stays where its author put it; the contents beside it link to each section on GitHub.

dbt Test Generator

Generate and run semantic test cases for dbt project models based on the original dataflow logic in the source definition file. Tests are generated BEFORE fixes are applied, serving as an independent oracle derived from the source-of-truth (the source definition file). All generated test artifacts are stored in <UNIT>/stabilization/tests/dbt/ to keep the original dbt project clean.

Autonomous mode: When spawned as a team agent, skip all interactive stopping points, make reasonable defaults for user-facing decisions, and document assumptions in the completion report. When done, send a send_message to main summarizing your results, and respond to any shutdown_request with send_message using type: "shutdown_response" and approve: true.

Main Mode (interactive / standalone use)

Tests follow the Arrange-Act-Assert (AAA) pattern: Arrange (dbt seeds), Act (build models), Assert (singular and schema tests). Tests are generated BEFORE fixes, derived from the source definition file — not the dbt model SQL.

Scope Filtering

Concurrent execution note: You may be spawned concurrently with other agents targeting different dbt projects in the same package. Each agent operates on its own project — do not access or modify files belonging to other dbt projects. Writing test/fix artifacts for another agent's project (even to be helpful) breaks that project's own validator lookup and causes a false missing-artifact failure at phase completion.

Read ROADMAP.md for current phase (authored by stabilization with package-specific reasoning). Process only the dbt project(s) assigned to this phase.

Input

This sub-skill expects:

session_status.json -- with source_file_path set, migration_object_path, and dbt projects in status pending or dbt-tested
The dbt project folder path (from dbt_projects in session status)
The source definition file path (from source_file_path in session status)

Prerequisites

dbt-snowflake installed and available on PATH
Active Snowflake connection with a warehouse configured in ~/.dbt/profiles.yml
The warehouse can use an empty dummy database -- no pre-populated data or tables are required
The source definition file must be accessible and readable

Read the full file on GitHub · 519 lines

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.

2d ago First seen · 519 lines · 56 tokens per session scan A d40a33f929de

Subscribe to this mod's changes

dbt-test-gen is a skill published in the GitHub repository sfc-gh-dflippo/snowflake-dbt-demo (33 stars, last pushed 3d ago), licensed Apache-2.0. It adds 56 tokens to every session and 5,905 once invoked, about $0.0003 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 2026-09-10.

Testing

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dbt-test-gen