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Hexaly

v0.1.0 · by Sergii Gulenok · added 3 November 2026

Syntax highlighting for Hexaly Modeler models (.hxm)

Languages
Install in Forge SuperView the source

How to install

With Forge Super installed, the button above opens the app on this extension, where you press Install. Nothing is installed until you do.

You can also open the Extensions panel in the app and search for Hexaly. The extension's id is hexaly.

Don't have Forge Super yet? Download it here.

README

From the extension's repository, written by its authors and not by Mentenaz. See the source.

zed-hexaly

Hexaly language support for Zed — syntax highlighting for Hexaly Modeler models (.hxm).

Ships a purpose-built tree-sitter grammar for the language, because none existed publicly: tree-sitter-hexaly. Zed cannot use the TextMate grammar from the official Hexaly VS Code extension, so highlighting had to be rebuilt on tree-sitter.

Status

Syntax highlighting only. A language server (diagnostics, go-to-definition, completions) is the next milestone and is not implemented yet.

What works today:

  • Highlighting of modeling constructs — constraint, minimize/maximize, the <- decision operator, indexed declarations over an index space, and sum/min/max aggregates
  • Bracket matching, auto-indent, and text objects
  • An outline listing model decisions alongside functions, since in a Hexaly model the decisions are the structure

Install

Not yet in the Zed extension registry. To use it now, install as a dev extension:

  1. Clone this repository
  2. In Zed, run zed: install dev extension from the command palette
  3. Select the cloned directory

Development

This repository holds the Zed queries in languages/hexaly. The grammar is a separate repository, tree-sitter-hexaly, pinned by rev in extension.toml: Zed clones it and compiles its generated src/parser.c directly, so keeping it apart is what keeps generated C out of this repo. A grammar change means landing it there and bumping rev here.

The grammar was validated by parsing a production Hexaly model (12 files, ~2500 lines) and all 66 example models shipped with Hexaly 14.0 with zero errors, and corrected against the official HXM BNF and the compiler itself; the findings from those passes are kept in the grammar repository's docs/.

License

MIT — see LICENSE. Not affiliated with or endorsed by Hexaly.