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The OP's comment to the post is clearly Markdown-formatted, real humans don't write like that on HN.

The readme is very obviously Claude-written (or a similar model - certainly not GPT), if you check enough vibecoded projects you'll easily spot those readmes.

The style of the HTML page, as noted by others.

Useless comments in the source code, which humans also do, but LLMs do more often:

// Basic random double

static inline double rand_double() { return (double)rand() / (double)RAND_MAX; }

I did not. The html was generated by Deepseek. Claude is far way too expensive for that. This is only an experimental code. I don't think it is worth to pay Claude to test a code which was already peer reviewed theoretically.

The most obvious thing to me is the style of the HTML graphs

The readme is outright slop, the HTML chart has the classic "tailwind dark theme" layout that models default to absent specific instructions, many of the comments in the code are classic AI.

Didn't have time to read the code more in depth.