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

# Tools and reference

- [Built-ins and value methods](https://osl.mistium.com/tools-and-reference/builtins-and-methods.md)
- [OSL command line](https://osl.mistium.com/tools-and-reference/cli.md)
- [Opal projects](https://osl.mistium.com/tools-and-reference/opal.md)
- [Testing](https://osl.mistium.com/tools-and-reference/testing.md)
- [Editor tooling](https://osl.mistium.com/tools-and-reference/editor.md)