"Claude 3.7"?
2. I'd wager the majority of HN commenters don't read their own comment before posting (pre-LLM days).
See: why authors wait days, weeks, or even months before editing what they've written (or, if you're more interested: cognitive regression, inattentional blindness, and the effects of misdirected saccades).
I read this to mean he wrote the comment, then asked Claude to fix the grammar (as many ESL speakers do). Sounds to me like he did write it.