Module path 

PATH manipulation, always over OsString (paths may be non-UTF8).

Functions

prepend_dedup

dir prepended to current, with any pre-existing occurrence of dir removed (dedupe, so nested dejavu start doesn’t stack shim dirs).

split_path

Split PATH into entries, dropping empty entries (POSIX “current dir”).

without_dir

current with every occurrence of dir removed — the sanitized PATH the real command runs against, so nested tool calls don’t re-enter a shim.