License
The culsans library is REUSE-compliant and is offered under multiple licenses:
All original source code is licensed under ISC.
All original test code is licensed under 0BSD.
All documentation is licensed under CC-BY-4.0.
All configuration is licensed under CC0-1.0.
Some test code borrowed from python/cpython is licensed under PSF-2.0.
For more accurate information, check the individual files.