I have an approach for multiple of these steps, which involves adapting a kind of non-LLMs respected authority tech approach (my previous side project), to LLMs.
I think it can be done right now with MCP servers in a way that you don't immediately hand over your data to the chatbot portal companies so that they can cut you out. (But, over time/traffic, they could quickly learn to mimick your MCP server, much like they mimick Web content and other training data, and at least appear to casual users to interact like you, even if twisted to push whatever company bid for the current user interaction. I haven't figured out what you do when they've trained on mimicking you with an evil twin; maybe you get acquired early, and then there are more resources to solve that next problem.)
I think it can be done right now with MCP servers in a way that you don't immediately hand over your data to the chatbot portal companies so that they can cut you out. (But, over time/traffic, they could quickly learn to mimick your MCP server, much like they mimick Web content and other training data, and at least appear to casual users to interact like you, even if twisted to push whatever company bid for the current user interaction. I haven't figured out what you do when they've trained on mimicking you with an evil twin; maybe you get acquired early, and then there are more resources to solve that next problem.)