My assumption was that it's a way to convey it was written by a human because it would be hard to get an AI to write in all lowercase (which it actually isn't).

I was just this morning reading one of those navel-gazing moltbook posts where the agent describes their "soul.md", and one of its few instructions was all-lowercase (which it was doing).

That early sentence "i’ll be vulnerable here (screenshots or it didn't happen) and share exactly what i've actually set up:" reads pretty clawdbot to me.