For example, when trying to initialize R on Windows, I was instructed to try all three methods (radian, sircon, and ark), and in the end only the ark method worked, so there was a lot of trial and error, but I don't understand the details myself. What's amazing is the ingenuity of our predecessors.

Actually, my Rust skills are not that great.
Most of the code for arf was written by Opus 4.5, and I only instructed them to refer to the source code of sircon, etc. (I was also in charge of manual testing.)

The installation size has become slightly smaller (9MB v.s. 11MB now), and I confirmed during development that startup times are faster.

As mentioned on mstdn, this is probably due to the fast drawing speed of Rust, so drawing may be faster than in the regular R console.

I don't think I could have done this kind of software without AI, so I have a lot of respect for what was written by hand, but times seem to have changed, for better or worse.

In fact, the existence of sircon convinced me that this was technically possible, and I've been thinking about making it someday.
I've never installed sircon, but after having Claude Code look at it, I was impressed by how incredibly advanced its functionality is.