I assumed bias was meant to mean I'm biased towards Anthropic, or to reflect some other unfair semi-hidden agenda that influences my writing.

I do have a relevant bias here I guess: I'm biased towards the pattern of granting an LLM the ability to execute commands in a Unix-style environment. I've been a huge fan of that approach ever since ChatGPT Code Interpreter launched in early 2023 and I'm excited that skills further solidifies why that pattern is such a good bet.

Well, personally I believe you don't have any ulterior motives here. But be warned - when you hype up stuff like that and aligns perfectly with the interests of Anthropic (or whatever other VC-propped GenAI company), it can certainly come across the wrong way. Take this feedback as an indicator to help you steer your writing, not as a personal attack.