auto-pair

Auto-closes brackets and quotes as you type; a manual style instead closes the nearest unmatched opener when you press one key.

On by default. Type ( and you get () with the caret between; type ) before an existing ) and the caret steps over it; backspace inside an empty pair deletes both. The full set is () [] {} and "" '' \``.

Options (set via :set, lattice.toml, or config::set_option in init.rs):

The manual style. With auto-pair.style=manual, the pair keys just insert themselves; a single key (<C-j>) closes the nearest unmatched opener above the caret, scanning only the enclosing lexical scope (via the tree-sitter seam, so it stays fast on large files) and falling through to whatever else the key is bound to when nothing is open. This is the vim-pairify model.

# lattice.toml — manual pairing
auto-pair.style = "manual"

Testing it. Open any file, enter insert mode, and:

• auto (default): type ( → (), caret between; type " → ""; type ) over an existing ) → steps over; <BS> inside () → deletes both.
• manual (:set auto-pair.style=manual): type ( → just (; move on, then press <C-j> → the matching ) is inserted at the nearest unmatched (.

Getting it

It ships with lattice and is enabled by default — nothing to install, no toolchain, works offline.

It contributes the minor mode auto-pair-mode, and the loader registers auto-pair.enabled as the switch for it:

:set auto-pair.enabled=false