Skales is source-available under the Business Source License 1.1 (BSL-1.1). This is not the same as being open source, and it is worth understanding the difference clearly so you know exactly what you can and cannot do with the code.
What BSL-1.1 Means in Practice
For personal users: Skales is completely free. Download it, use it, modify it for your personal use, share your customisations with other personal users. The source code is on GitHub and you can read every line. No cost, no restriction on personal use.
For developers: You can build on Skales, fork it, contribute to it, and modify it for personal use or for contributing back to the project. The restriction is on commercial deployment — you cannot use Skales as the foundation for a commercial product or service without a commercial license.
For businesses: Using Skales internally within your organisation (employees using it as a productivity tool) is generally permitted under personal use. Distributing Skales to your customers, embedding it in your product, or offering Skales-based services commercially requires a commercial license.
Why BSL-1.1, Not MIT?
BSL-1.1 is a sustainable model for independent developers. It keeps the source open and the product free for the users who benefit most from it — individuals and small teams — while creating a path to revenue from large commercial users who build businesses on top of the work. Without some commercial protection, building and maintaining Skales long-term would not be viable as an independent project. The source is visible, the personal use is free, and the commercial terms are clear. That is the trade-off we chose. Questions? Open an issue on GitHub.