libtmux:load-buffer

Load a file's bytes into a literal named or automatic buffer; return an outcome. PATH is literal path text, not a format. Relative paths follow the tmux command client's cwd. An empty file is tmux's no-op and preserves an existing buffer. New names reject backslashes, ASCII controls and DEL before I/O. Use SET-BUFFER for in-memory bytes. Signals INVALID-ARGUMENT or an operational condition; a failure after dispatch may have an uncertain outcome.