# fs/tmp-dir
Per-process scratch directory `/tmp/deft-<pid>/`. Created on first call.
Use for ephemeral files (editor snapshots, MCP transport, debug dumps).
## Syntax
[fs/tmp-dir]
## Examples
set dir [fs/tmp-dir] [fs/write [fs/join $dir "debug.log"] $msg]
## Returns
String path to the scratch directory.
## See Also
`fs/tmp-path`, `fs/tempdir`