> For the complete documentation index, see [llms.txt](https://engine.sygnal.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://engine.sygnal.com/usage.md).

# Usage Notes

- [Developing with SSE](https://engine.sygnal.com/usage/developing-with-sse.md): The basics of developing with Sygnal Site Engine.
- [Building & Deploying Code](https://engine.sygnal.com/usage/building-and-deploying-code.md)
- [Functional Interactions (FIX)](https://engine.sygnal.com/usage/functional-interactions-fix.md)
- [FIX Elements](https://engine.sygnal.com/usage/functional-interactions-fix/fix-elements.md)
- [Code Structure](https://engine.sygnal.com/usage/code-structure.md)
- [Page Router](https://engine.sygnal.com/usage/page-router.md)
- [Components](https://engine.sygnal.com/usage/components.md)
- [Components Future Notes](https://engine.sygnal.com/usage/components/components-future-notes.md)
- [Source Structure & Key Files](https://engine.sygnal.com/usage/source-structure-and-key-files.md)
- [Utilities](https://engine.sygnal.com/usage/source-structure-and-key-files/utilities.md)
- [Route Dispatcher](https://engine.sygnal.com/usage/source-structure-and-key-files/route-dispatcher.md)
- [Infrastructure](https://engine.sygnal.com/usage/source-structure-and-key-files/infrastructure.md)
- [Usage Notes](https://engine.sygnal.com/usage/source-structure-and-key-files/usage-notes.md)
- [SCSS](https://engine.sygnal.com/usage/scss.md)
- [Useful Library Additions](https://engine.sygnal.com/usage/useful-library-additions.md)
- [Adding Libraries](https://engine.sygnal.com/usage/useful-library-additions/adding-libraries.md)
- [Luxon](https://engine.sygnal.com/usage/useful-library-additions/luxon.md)
- [Cookies](https://engine.sygnal.com/usage/useful-library-additions/cookies.md)
- [Core Libraries](https://engine.sygnal.com/usage/useful-library-additions/core-libraries.md): These are included in the base Engine configuration.
- [Extending Capabilities](https://engine.sygnal.com/usage/useful-library-additions/extending-capabilities.md)
- [Best Practices](https://engine.sygnal.com/usage/best-practices.md)
- [Sygnal DevTools](https://engine.sygnal.com/usage/sygnal-devtools.md)
- [Unit Testing](https://engine.sygnal.com/usage/unit-testing.md)
- [Using Google Sheets as a Unit Test Data Source](https://engine.sygnal.com/usage/unit-testing/using-google-sheets-as-a-unit-test-data-source.md)
- [Datetime & Timezone Tests](https://engine.sygnal.com/usage/unit-testing/datetime-and-timezone-tests.md)
- [Best Practices](https://engine.sygnal.com/usage/unit-testing/best-practices.md)
- [Page 1](https://engine.sygnal.com/usage/unit-testing/page-1.md)