azuresql-db-seed

azuresql-db-seed is a skill for Claude Code, Codex from microsoft/azure-sql-database-container. It costs 163 tokens per session (2,025 once invoked), scanned A, original, MIT.

A guide for filling an existing local database named appdb with realistic sample or test data. Seed data gives an application records to display, query, and test against.

In plain words
What is it for?
Use it to populate a development database, load fixtures, insert fake data, or create sample rows for testing.
Why use it?
It avoids developing against an empty database and avoids manually entering repetitive test records.

Skill for Claude CodeCodex

Part of the azure-sql-database-container plugin — 17 skills shipped together

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.

agentmods
npx agentmods add skills/microsoft/azure-sql-database-container/azuresql-db-seed
Any agent
npx skills add microsoft/azure-sql-database-container --skill azuresql-db-seed
Clone the repo
git clone --depth 1 https://github.com/microsoft/azure-sql-database-container

Made for: Claude Code, Codex.

Or install azure-sql-database-container, the plugin that ships this one along with the rest of its 17 skills.

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.

agentmods badge for azuresql-db-seed

README.md
[![agentmods](https://agentmods.dev/badge/skills/microsoft/azure-sql-database-container/azuresql-db-seed.svg)](https://agentmods.dev/skills/microsoft/azure-sql-database-container/azuresql-db-seed)
Your own site
<a href="https://agentmods.dev/skills/microsoft/azure-sql-database-container/azuresql-db-seed"><img src="https://agentmods.dev/badge/skills/microsoft/azure-sql-database-container/azuresql-db-seed.svg" alt="Measured on agentmods" height="20"></a>
Per session 163 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,025 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00163 $0.02025
Opus 5 $0.00081 $0.01012
Sonnet 5 $0.00033 $0.00405
Haiku 4.5 $0.00016 $0.00202

Measured 3d ago against content hash f386b7be1ab4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

azuresql-db-seed 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 3d 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.

skills/azuresql-db-seed/SKILL.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Seed the dev database on the Azure SQL Database container

Fill an existing appdb with realistic sample data so the app has something to render, query, and test against. This is the Azure SQL engine (Private Preview), not the SQL Server image.

Use this skill for populating data. For bootstrapping a whole new app use azuresql-db-scaffold; for restoring an existing .bacpac use azuresql-db-import.

Engine facts that shape seeding

  • USE this engine image: sqldbpreview-dpgaeqhmgphzd4bk.azurecr.io/azure-sql/db-dev:latest (x64 / linux/amd64). Do NOT use mcr.microsoft.com/mssql/server (the SQL Server image).
  • The registry is private (Private Preview): run docker login sqldbpreview-dpgaeqhmgphzd4bk.azurecr.io first with the pull-only credentials from https://aka.ms/sqldbcontainerpreview-signup (they may rotate).
  • Verify identity: SELECT SERVERPROPERTY('EngineEdition') returns 5 and SERVERPROPERTY('Edition') returns 'SQL Azure'.
  • Required env when starting the container: ACCEPT_EULA=Y and a complex MSSQL_SA_PASSWORD (example literal used throughout: YourStr0ng_Passw0rd). The engine listens on 1433.
  • On a non-x64 host add --platform linux/amd64 to docker run.
  • The engine does NOT auto-create databases. You must CREATE DATABASE appdb on a master connection before you seed anything.
  • Do NOT use USE appdb to switch databases. In a user-database session USE returns Msg 40508. Always select the target database in the connection string (Database=appdb, or -d appdb for sqlcmd).
  • Apps read one env var, SQL_CONNECTION_STRING. Strings use User Id= / Password= / Database= and TrustServerCertificate=true. sqlcmd uses -C to trust the self-signed cert.

Step 1: provision appdb (always, before any seed)

Seeding into a database that does not exist fails. Create appdb on a master connection first:

docker exec sqldb /opt/mssql-tools18/bin/sqlcmd -S localhost -U sa -P "YourStr0ng_Passw0rd" -C -b \
  -Q "IF DB_ID('appdb') IS NULL CREATE DATABASE appdb;"

Read the full file on GitHub · 124 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

  1. 3d ago First seen · 124 lines · 163 tokens per session scan A f386b7be1ab4

Subscribe to this mod's changes

azuresql-db-seed is a skill published in the GitHub repository microsoft/azure-sql-database-container (16 stars, last pushed 2d ago), licensed MIT. It adds 163 tokens to every session and 2,025 once invoked, about $0.0008 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 2026-08-30.

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