> This page location: Docs > Reference
> Full index for agents: https://www.semantius.com/llms.txt

# Reference

> Detailed documentation for models, business logic, MCP connectors, agent skills and the CLI.

- **URL**: https://www.semantius.com/docs/reference

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Reference documentation for every part of Semantius. Start with the
[Overview](https://www.semantius.com/docs/overview.md) if you are new, or jump straight to the
area you are working in.

## Overview

[What Semantius is](https://www.semantius.com/docs/overview.md) and how semantic models, MCP
servers, agent skills and the CLI fit together.

## Models

[Models](https://www.semantius.com/docs/models.md) are the centre of Semantius. Learn how a model
is [structured](https://www.semantius.com/docs/models/structure.md), how to
[create](https://www.semantius.com/docs/models/create.md) one, how to start from a
[template](https://www.semantius.com/docs/models/templates.md), and how to
[deploy](https://www.semantius.com/docs/models/deploy.md) and
[optimize](https://www.semantius.com/docs/models/optimize.md) it.

## Business Logic

[Business logic](https://www.semantius.com/docs/business-logic.md) is expressed in
[JsonLogic](https://www.semantius.com/docs/business-logic/jsonlogic.md), plus the
[extensions](https://www.semantius.com/docs/business-logic/extensions.md) Semantius adds for
record-level computed fields, validation rules and permissions.

## MCP Connectors

[MCP connectors](https://www.semantius.com/docs/mcp-connectors.md) expose your model to AI chats.
See [installation](https://www.semantius.com/docs/mcp-connectors/installation.md) to connect one.

## Agent Skills

[Agent skills](https://www.semantius.com/docs/agent-skills.md) give coding agents domain
expertise for your model. See
[installation](https://www.semantius.com/docs/agent-skills/installation.md) to add them.

## CLI

The [CLI](https://www.semantius.com/docs/cli.md) drives Semantius from your terminal: the
[semantius command](https://www.semantius.com/docs/cli/command.md) and the
[use-semantius skill](https://www.semantius.com/docs/cli/use-semantius.md).

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## Related

- [Overview](https://www.semantius.com/docs/overview.md)
- [Docs home](https://www.semantius.com/docs.md)
- [Full index for agents](https://www.semantius.com/llms.txt)