An extension for Zed that adds Roc language support:

• syntax highlighting through treesitter and
• type tooltips, error marker, completion ... through the roc language server

• install roc from the roc-lang website
• add roc and roc_language_server to your PATH
• install Zed from the Zed website

• Website: roc-lang.org
• Tree Sitter: tree-sitter-roc
• Language Server: roc-language-server included in nightly builds of the ROC compiler e.g. https://github.com/roc-lang/roc/releases/download/nightly/roc_nightly-macos_apple_silicon-latest.tar.gz, the roc_language_server binary should be included in PATH.

~/Library/Application\ Support/Zed/extensions/installed/
less ~/Library/Logs/Zed/Zed.log