Move a repo without losing its Claude Code sessions

A plain mv of a repo works fine for git and breaks everything Claude Code keeps about that repo. Nothing errors — the sessions simply stop appearing, the trust dialog comes back, and the old transcripts sit in a directory nothing looks at any more. This skill is the remap that makes the move invisible.

Commands live in reference/playbook.md; three helpers live in scripts/ — slug derivation, the worktree move plan, and the registry remap. This body is the model and the rules.

The three things, and only one of them is the repo