Atlas is a language-independent tool that treats a database schema as code and manages changes to it through declarative or versioned migrations. Developers use it to describe, compare, plan, lint, and apply database schemas expressed in SQL, HCL, or an ORM. The catalogue entries provide add-ons for operating Atlas workflows.
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.
npx skills add ariga/atlas --skill atlas-mssqlgit clone --depth 1 https://github.com/ariga/atlasWrote 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.
[](https://agentmods.dev/skills/ariga/atlas/atlas-mssql)<a href="https://agentmods.dev/skills/ariga/atlas/atlas-mssql"><img src="https://agentmods.dev/badge/skills/ariga/atlas/atlas-mssql/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.
<a href="https://agentmods.dev/skills/ariga/atlas/atlas-mssql"><img src="https://agentmods.dev/badge/skills/ariga/atlas/atlas-mssql.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00147 | $0.03594 |
| Opus 5.5 | $0.00059 | $0.01438 |
| Sonnet 5.5 | $0.00029 | $0.00719 |
| Haiku 4.5 | $0.00015 | $0.00359 |
Grade A, and why
atlas-mssql 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.
How it starts
The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Atlas for SQL Server
What is specific to SQL Server when Atlas manages the schema. The atlas skill covers the workflows
and commands; this skill covers the rules, edge cases, and answers that differ on SQL Server. Behavior
is described for SQL Server 2022; where a compatibility level changes it, the text says so. Azure SQL
Database follows the same rules, and Fabric Data Warehouse has a guide of its own
(https://atlasgo.io/guides/azure-fabric).
Files
This skill is SKILL.md plus seven reference files under references/, each served at
https://atlasgo.io/skills/atlas-mssql/references/<name>. Read a reference when the task needs it:
| File | Read it for |
|---|---|
references/dev-database.md |
Connection URLs, mode=schema and mode=database, Docker dev URLs, atlas tool docker, the docker block (collate, baseline), your own dev database, compatibility level and collation, Azure SQL |
references/security.md |
Database roles and users, users for logins, fixed database roles, GRANT and REVOKE, what is not managed (DENY, logins, row-level security) |
references/objects.md |
Constraint names, identity and sequences, column changes, alias and table types, functions, procedures, triggers and views, clustered indexes, temporal, memory-optimized and partitioned tables, what Atlas does not manage |
references/hcl.md |
Writing the schema in HCL: the NOT NULL default, defaults and their names, types (-1 for MAX, datetime2(7)), nonclustered, routines, sequences and types, seed data |
references/migrations.md |
Lint on SQL Server, transactions, GO and the delimiter directive, txmode none, lock-safe changes, the revisions table and the lock, baselines |
references/testing.md |
Testing every change: T-SQL assertions, schema tests, permission tests with as, migration tests with seeded rows |
references/custom-rules.md |
Writing a custom lint rule in the HCL rule language when no analyzer covers a check: what SQL Server objects expose, and tested rules |
What ships with it
7 files 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.
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.
- 3d ago First seen · 157 lines · 147 tokens per session scan A e741db134b83
atlas-mssql is a skill published in the GitHub repository ariga/atlas (8,773 stars, last pushed 3d ago), licensed Apache-2.0. It adds 147 tokens to every session and 3,594 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-10-12.
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