[8organicbits]

Huh, that's a breaking change. yes/y/no/n/on/off are no longer boolean.

https://perlpunk.github.io/yaml-test-schema/schemas.html

[milliams]

Yes, it it. However, it's a breaking change that happened 14 years ago.

[masklinn]

Except for many yaml implementations either not supporting 1.2 at all (pyyaml, ruby stdlib) or being a weird mix (goyaml) so as to keep working with older files.

So when you’re dealing with objective reality, this is still an issue today.