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Released May 25, 2026.

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New features

  • In-editor grammar management. A new :grammar command brings the vorto grammar CLI into the editor. :grammar (or :grammar list) opens an interactive modal listing every recipe with its install status — j/k move, Enter installs the selected grammar, d removes it, and the modal stays open across installs. :grammar install <name>… | --all and :grammar remove <name>… also work inline. Installs run on a worker thread, and the active buffer re-highlights on completion with no restart. The command shows up in the which-key hint panel and Tab completion.
  • Install on open. Opening a file whose language has an install recipe but whose grammar isn’t on disk now shows a yes/no install this grammar? prompt instead of a highlight-failed error. Press y or Enter to install; the buffer lights up when the install finishes. Each grammar is asked about at most once per session, so opening more files of the same language stays quiet.
  • Custom [grammars.<name>] recipes. You can now define grammars outside the built-in catalog in config.toml, so vorto grammar install <name> works for them too. Each recipe takes a source git URL (alias src), an optional rev to pin a tag, branch, or commit, and an optional subpath for grammars that live inside a monorepo. Queries for custom grammars are user-supplied, since only built-ins carry bundled .scm files.

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Improvements

  • In-process grammar compilation. Grammars now compile in-process via the cc crate instead of shelling out to tree-sitter build, so a C compiler is the only hard build requirement. The tree-sitter CLI is now a fallback used only for the rare grammar that ships no pre-generated parser.c and must be generated from grammar.js. Grammars that ship only parser.c build without a C++ toolchain — a C++ compiler is required only when the grammar includes a scanner.cc / scanner.cpp.
  • vorto grammar list grouped by status. The list now groups grammars by install status and adds a custom (from config) section for [grammars.*] recipes. Pass -v for the detailed per-grammar view.