What is worker-local-setup?

A setup workflow for installing and starting a Data Exchange Worker on a laptop, virtual machine, or on-premises server. The worker reads data from a source database and sends it to Snowflake.

Use it to prepare a host, check connectivity prerequisites, configure the worker, and start it for a data migration.

It guides the machine-side setup needed when the migration worker must reach both the source database and Snowflake. It also checks for required database drivers, such as Microsoft's SQL Server driver.

worker-local-setup — Skill for Claude Code by sfc-gh-dflippo

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo

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

agentmods

npx agentmods add skills/sfc-gh-dflippo/snowflake-dbt-demo/worker-local-setup

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/worker-local-setup/github.svg)](https://agentmods.dev/skills/sfc-gh-dflippo/snowflake-dbt-demo/worker-local-setup)

Your own site

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

Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,013 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	$0.00029	$0.02013
Opus 5	$0.00015	$0.01007
Sonnet 5	$0.00006	$0.00403
Haiku 4.5	$0.00003	$0.00201

Measured 2d ago against content hash 908eecc1b1ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

worker-local-setup 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/data-infrastructure/worker-local-setup/SKILL.md · 141 lines

How it starts

The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Worker Local Setup

Set up and run the Data Exchange Worker on whatever machine will execute it: a laptop, a cloud VM, an on-premises server, or one host per worker when scaling out. The steps are the same on each host.

Prerequisites

Note: Ensure the host can reach both the source database and your Snowflake account (and meets any corporate firewall or proxy rules when applicable).

Prerequisites depend on the source dialect and the extraction strategy chosen in data migration setup. Load extraction-strategies-reference.md for the full matrix; complete the matching section below before Step 1.

SQL Server — `regular` (ODBC)

The Data Exchange Worker connects to SQL Server via the Microsoft ODBC Driver. Before starting the worker, verify it is installed:

odbcinst -q -d 2>/dev/null | grep -i "ODBC Driver"

If the command returns a driver name (e.g. [ODBC Driver 18 for SQL Server]), the driver is present — continue to Step 1.

If the command returns nothing, the driver is missing. Stop here and ask the user to install it — do not attempt installation yourself, as it requires sudo and interactive steps that cannot be automated.

Tell the user:

The Data Exchange Worker requires the Microsoft ODBC Driver for SQL Server to connect to your source database. Please install it and then resume.

macOS — Homebrew (recommended):
brew tap microsoft/mssql-release https://github.com/Microsoft/homebrew-mssql-release
brew update
HOMEBREW_ACCEPT_EULA=Y brew install msodbcsql18
The brew tap step may ask you to confirm adding a third-party repository — this is expected.

macOS — without Homebrew: Download and install the .pkg from the Microsoft ODBC Driver download page. Choose the macOS package matching your architecture (arm64 for Apple Silicon, x86_64 for Intel).

After installing, verify with:
odbcinst -q -d | grep -i "ODBC Driver"
Then resume the setup.

Read the full file on GitHub · 141 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 · 141 lines · 29 tokens per session scan A 908eecc1b1ca

Subscribe to this mod's changes

worker-local-setup 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 29 tokens to every session and 2,013 once invoked, about $0.0001 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.

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