I’d be curious to see the outcome of changing the license to a Fair Source License or explicitly “You are not allowed to use this software if you are Anthropic,

I’d be curious to see the outcome of changing the license to a Fair Source License or explicitly “You are not allowed to use this software if you are Anthropic, otherwise MIT”. They could still use the current version, but for any in the future they’d be forced to fork it or be prepared to face yet another legal battle (I can imagine some lawyers already salivating at the thought). It’s also curious the author is looking inside the app for proof their software is being used. If it’s MIT, mustn’t the license be included and available somewhere easier to verify?