Moving a session to the cloud now sends a summary, with new refusal messages

What

You can move a local session (one conversation with Claude) to a cloud session with --cloud. The move now sends a summary of the conversation instead of attaching the conversation as a file.

• The notice now says Claude in the cloud has a summary, "not the conversation itself". Before, it said Claude had "its newest messages, with the conversation as a file to read", and the conversation was sent as an attached file.
• If the conversation is too long, the error tells you to run /compact in claude --resume first.
• If logging in failed, it tells you to log in first.
• If the conversation changed after the summary was made, the move is refused.

Claude Code also records whether a summary was carried over.

Why

A session moved to the cloud starts from a summary only, so Claude there may know less of the older history. The new messages tell you what to do when a move does not go through.