[eru]

Just say that you don't support mixing both APIs.

[lazyasciiart]

Now you’re telling users to check the source code of any tools they use with your stuff? “We recommend using ToolOne only on content you do not also manage with ToolTwo”

[eru]

See how libfuse handles it with their low level and high level APIs.

[actionfromafar]

That’ll fix it. ;-)