What
The transcript is the saved record of a session. When Claude Code writes one of Claude's replies into it, the entry now includes extra details worked out from the reply's content. Your own messages are now saved through a different step as well.
Why
The shape of saved transcripts, or of output given to programs built on Claude Code, may differ from before.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear which details are added to each saved reply.