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Atlas

Atlas is a database schema-as-code tool: like Terraform, for databases. Define your schema in SQL, HCL,

For agents: Atlas: schema-as-code tool for databases (like Terraform). Covers schema, migrations, security and data as code, testing, and configuration docs.

schema as codedatabase migrationssql schematerraform for databasesdatabase testing

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-21T11:43:06.093Z. Cached copy · Source on atlasgo.io

# Atlas

> Atlas is a database schema-as-code tool: like Terraform, for databases. Define your schema in SQL, HCL,
> or your ORM (SQLAlchemy, Django, Prisma, Drizzle, TypeORM, Sequelize, Hibernate, Ent, GORM, EF Core,
> Doctrine), and Atlas diffs, plans, lints, tests, and applies safe migrations, declarative or versioned.
> The same as-code workflow shifts the whole database left: Security as Code (roles, users, and permissions),
> Data as Code (declarative seed and reference data), and Monitoring as Code (drift detection with
> auto-remediation). Supports PostgreSQL, MySQL, MariaDB, SQLite, SQL Server, ClickHouse, Oracle, Snowflake,
> Spanner, Redshift, Databricks, and more. Documentation: https://atlasgo.io

## Terms

- Content on atlasgo.io is Copyright Ariga Technologies. All rights reserved. Use is governed by the
  website Terms of Use: https://ariga.io/legal/tos
- The documentation is provided for using and evaluating Atlas and for educational purposes. Using it to
  build or support products or services that compete with Ariga or Atlas is not permitted.
- Atlas binaries are distributed under the Master License and Services Agreement (MSA), which prohibits
  using the Software to build or support products or services that compete with Ariga or Atlas:
  https://ariga.io/legal/msa

## Schema as Code

- [Schema as Code](https://atlasgo.io/atlas-schema): Define the desired state of your database and compose schemas like Terraform modules.
- [HCL syntax](https://atlasgo.io/atlas-schema/hcl): The Atlas HCL schema language: tables, columns, indexes, foreign keys, views, functions, triggers.
- [SQL schema](https://atlasgo.io/atlas-schema/sql): Define the desired schema in plain SQL DDL.
- [External schemas and ORMs](https://atlasgo.io/atlas-schema/external): Load the desired state from ORMs and external programs.
- [Monitoring as Code](https://atlasgo.io/monitoring): Monitor live databases for schema drift, permission mismatches, and policy violations.
- [Drift detection](https://atlasgo.io/monitoring/drift-detection): Detect drift and generate the SQL to bring databases back in line.

## Configuration

- [Project configuration](https://atlasgo.io/atlas-schema/projects): The atlas.hcl project file: environments, variables, migration and lint settings.
- [Data sources](https://atlasgo.io/atlas-schema/projects#data-sources): Load configuration and schema state from external sources in atlas.hcl.
- [Input variables](https://atlasgo.io/atlas-schema/input-variables): Parameterize schemas and project files with typed variables.
- [HCL column types](https://atlasgo.io/atlas-schema/hcl-types): The column type registry for every supported engine.

## Security as Code

- [Security as Code](https://atlasgo.io/guides/security-as-code): Manage roles, users, and permissions as code; Atlas diffs, plans, and applies the changes.
- [PostgreSQL declarative security](https://atlasgo.io/guides/postgres/security-declarative): Roles and permissions as code for PostgreS
…

Related sites

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