Kagi assistant could benefit a lot from having a dedicated proofreading mode similar to Apple's proofreading where it highlights all the changes made by the AI and let you pick the ones you want.
Currently with Kagi I have to ask it to proofread and then use WinMerge to actually compare the results in order to pick what I want to keep as AI is wonderful a proofreading, but still not perfect. Which is suboptimal to say the least.
This could also be a tool in the browser extension as then it would let people proofread all their replies on the fly which would be a major selling point for Kagi. IMO. As is I probably won't keep my ultamiate subscription because I just don't use it that much. However if had more useable proofreading tools that alone would make it an instant perma-subscription for me.
Appel intelligence proofreading is the best example I can give.
By adding this feature to Kagi assistant, it would allow the assistant to do a much greater job at assistant with one of the most common writing tasks people need assistance with.
As a mode on the website I see it being a seperate page were you can upload or past what you want proofread and then after submitting it you are taken to another page where were it shows the resulting proof reading results allowing you to hover over each one and select if you want to keep the change or revert it.
As part of the browser extension I'd see it as an option to highlight text and use a shortcut, or click the extension icon to proofread the currently selected text.