alt Hacker NewsAgree, that it is an ad. Also, unless the full session (in a resume-able format, along all session artifact such as intermediate research/docs used to produce the final output) is also included in the commit, the session id is useless.
I presume this is Anthropic trying to their "usage" stats before their IPO.
Funny to compare it to “Sent from iPhone” that Apple appended to emails by default way back when.
It was an ad, but nobody cared because using iPhone was a point of pride.