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Fennel

v0.2.0 · by Peter Tripp · added 3 November 2026

Fennel language support.

LanguagesLanguage servers

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 Fennel. The extension's id is fennel.

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.

Fennel for Zed

Zed Extension for Fennel language support for powered by:

Screenshot

Features

  • Syntax highlighting for Fennel forms, literals, bindings, reader macros, and calls
  • Automatic indentation and bracket matching
  • Code outline entries for named functions, lambdas, macros, and function bindings
  • Comment toggling and .fnl file detection
  • Completions, diagnostics, navigation, and formatting through fennel-ls

Language server

This extension does not download fennel-ls. It looks for a fennel-ls executable in the worktree's PATH and reports an error if it cannot find one.

On macOS, install it with Homebrew:

brew install fennel-ls

For other installation methods, see the fennel-ls installation guide.

Development installation

  1. Open Zed's Extensions page.
  2. Select Install Dev Extension.
  3. Choose this repository's directory.

License

MIT