# Concepts

Concepts holds the model the rest of the documentation is written against: the entities you own, who may act on them, and the interfaces those actions run through.

- [Read the Lessly platform model](/concepts/platform-model): organization, product, member, role, permission, integration, API key and session — each defined once, with the four interfaces that reach them.

## Where the depth lives

- [Manage your organization and its members](/access/organizations-and-members): the customer entity that holds the members and the invoice.
- [Create and rename a product](/products/products): slugs, reserved names, and the `eu` region.
- [Compose roles and permissions](/access/roles-and-permissions): the `{area}_{entity}_{action}` key and the allow/deny decision.
- [Pick an interface](/interfaces): the Product App, the CLI, the MCP server and the REST API, compared.
- [Understand how deployment works](/ship/deployment): what happens between your prompt and a live URL.