safe-bulk-rename

Rename a token across hundreds or thousands of files in this shared worktree — a package, a directory, a product name — without corrupting load-bearing strings, without committing a peer's in-flight work, and without leaving dangling references. Load BEFORE the first sed of any rename touching more than ~20 files, before renaming a published package, and whenever a rename has to move a directory that other files reference by path. Do NOT load for a rename inside one file, or a symbol rename an LSP can do.