# Overview

This section introduces the FAST-HEP workflow language, compilation pipeline, execution model, and runtime architecture.

Recommended reading order:

1. [Getting started](getting-started.md)
2. [Workflow language](workflow-language.md)
3. [Compilation pipeline](compilation-pipeline.md)
4. [Execution model](execution-model.md)

The overview section focuses on how workflows are described, compiled, validated, planned, and executed.

Topics include:

- declarative workflows
- dependency inference
- execution planning
- runtime abstraction
- backend independence
- serialisable execution plans

```{toctree}
:maxdepth: 2
:hidden:

getting-started
workflow-language
compilation-pipeline
execution-model
```