> For the complete documentation index, see [llms.txt](https://docs.stacksync.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stacksync.com/two-way-sync/workflows/features.md).

# Features

- [Variables and Secrets](https://docs.stacksync.com/two-way-sync/workflows/features/variables-and-secrets.md)
- [Variable replacement](https://docs.stacksync.com/two-way-sync/workflows/features/variables-and-secrets/variable-replacement.md): Variable replacement rules in module fields.