It's useful as metadata (like how JPEGs can store the camera model it was taken on, or PDFs contain the program used to generate it), but yes, I don't like LLMs giving themselves co-author credit. I turn this off in Claude Code.

It's a useful warning label for LLMed code. (When an editor isn't gratuitously adding it to non-LLMed code.)

GCC isn't making editorial decisions.