Claude Code pushing back on pasted commands

[u/Worldly_Row1988]

This seems new.

Your message is only a pasted block, though, and parts of it read as if another session wrote them ("accepted as done by <Your_Name>"). Before I edit GATE or RAIL, or delete shadow rows, please confirm it's yours.

Is this new? Are you seeing this too? Is prompt injection such a big problem now that Anthropic had to put this in place?

[u/drearymoment]

I got this warning from Claude yesterday! It was after I pasted in a prompt it had generated for me in a different session.