> You can even see the emdash attempt (markdown renders two normal dashes as an emdash)
He says he wrote it all manually.[0] Obviously I can't know if that's true, but I do think your internal AI detector is at least overconfident. For example, some of us have been regularly using the double hyphen since long before the LLM era. (In Word, it auto-corrects to an en dash, or to an em dash if it's not surrounded by spaces. In plain text, it's the best looking easily-typable alternative to a dash. AFAICT, it's not actually used for dashes in CommonMark Markdown.)
The rest is more subjective, but there are some things Claude would be unlikely to write (like the parenthetical "(ie. progressive disclosure)" -- it would write "i.e." with both dots, and it would probably follow it with a comma). Of course those could all be intentional obfuscations or minimal human edits, but IMO you are conflating the corporate communications vibe with the LLM vibe.