Copilot Agent and Claude Code use their own sandbox, which requires less setup but is also quite limited. With your own cloud setup, agents can perform better end to end testing, including database dependencies and specific tool calls.
The context is i, j, k as indices in programs. No doubt FORTRAN was influenced by prior use such as you cite. But in no case does i used as an index come from i designating an imaginary number, which is what I aimed to refute.
The site is pretty clear: "Free and works in browser", "Processed locally", "Private". But apparently the site (sorry for the harsh word, but I can't interpret it any other way) lies.
"is incorrect" is slightly less harsh, but in this case, I'd call it a lie. It's a rather subtle but important implementation detail. I don't think the author (who is here in this thread) is necessarily malicious because of this, but, well, it's a lie.
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