# libtmux.neo.FIELD_VERSION

- **Module:** libtmux.neo
- **Package:** libtmux
- **Language:** Python
- **Kind:** constant
- **Source:** https://github.com/tmux-python/libtmux/blob/036c521c4b83ce6e434eb50afe2a0d08a6a05e46/src/libtmux/neo.py#L51
- **Page:** https://libtmux.org/reference/py/libtmux-neo-field_version/

Minimum tmux version that registers each format token.

Field names absent from this dict default to ``"3.2a"`` (always-safe within
the supported tmux range). Entries here represent tokens added after 3.2a
that need explicit gating to keep the ``-F`` template compatible with older
tmux versions.